*I'll definitely build one of these within the next 5 years. I'll add it to my list of things to build. Everyone ask me again in 5 years if you see this comment!*
I've been thinking of this for a while and was looking for a good "how to" video, so thanks - I can't give you enough upticks! All the ideas I had were complicating the whole thing far too much. This is simple and doable and I can't wait to get started. Best wishes.
@@gustav-adolfschildt I’m about to start building one, have several 330 totes available and even have a long piece of 6” pvc and 10” pvc female ends that I picked up on Craigslist for $20, any tips you can give me? 6” too big, 4” better? 🙏🏼🙏🏼🙏🏼
I’ve seen some people use double blow up mattresses to store the gas, if you can’t find bladders. Then you could tee them together to increase capacity. On the plus side, it would allow you to put a flat board on top of the stack and sandbag it to give the required pressure, instead of pumping!
I read "The Handbook of Homemade Power" when I was 14.. and studied deeply on these.. I had dug a hole in the yard, gotten barrels and many of the other parts, unfortunately, my parents made me fill the hole back in and I never finished. You have re-inspired me... Maybe I will build one of these for my farm sometime soon. There are 2 best temperature zones for anaerobic digestion 90 degrees F and 120-130 F. My thought is to tie this in to my greenhouse thermal mass system and use the excess heat to help better regulate the digester temps. Thanks for sharing!
best video on the subject right now I'm sleeping in my car, lost my home due to Hurricane Micheal when it hit Florida, On social security due to Parkinson. could not afford house insurance. Probably get me a utility building next month to live in and maybe a use RV in 6 months,, Just got power back yesterday got a tent set up as well Studying up on as many ways as I can that I can be off the grid,, I do have to have the power lines running to my new place, but I will be using my power as much as possible
This is a great solution for off-grid living and I plan to build a system like this to manage off-grid waste. However I must point out that in several of your examples you show biogas stored in bags in areas where if they were exposed to a source of ignition a serious fire or explosion could occur. I feel that unless someone is properly trained in how to store gas safely they should not attempt it without professional help. these gas bags are only safe if stored outside and away from any buildings and should be fenced off with warning signs like you would find at a gas station. People could be seriously injured or killed by the amount of gas these bags can hold. Never store these bags inside a building. You should note this in your video. Other than that this is really great technology that should be used more. I am working on a way to use the waste gas to heat the digestor to keep the bacteria happy in a cold climate and make the process more effective than a septic waste disposal system.
Top video. Looking forward to the video to teach how to scrub the gases produced of all impurities that will lead to the corrosion of pressurised storage and plumbing.
Thank you so much for sharing. I have been eye balling this biogas stuff for awhile now. But trying to think about its viability here in Canada. I think after seeing this that I have found the solution here. This should complete my off grid system very nicely. Again thank you!!!!!
I have considered this for my home, but the things I have read indicate a small amount of gas is produced in a household sized system. This lead me to think of what else it could be used for, and I came to the conclusion that a green/grow house, lit/heated by gaslight would make sense. When I search for information on growing plants by gaslight, I get either ancient information, or weed growers referencing that ancient information to use with electrical light. I think a building that processes compost through chickens and the chicken waste through a biogas system, while growing plants, and producing fertilizer, would be a good fit in lots of urban areas.
Thanks to Mashav 2017, I had a hands on training on this simple but very useful technology. I hope to use it basically solve sanitation problem and use the efflueut to plant vegetables
Would this work coupled with a black soldier fly cultivation unit? To use the worms to pre grind the biomass and use what nutrients they can for a more useful/valuable resource (food or feed), then make biogass from what remains?
Awesome video, thanks! Quick question. I've built the 3ibc system. Now that it's all connected and producing gas, my slury out pipe is never exiting fertilizer. It does when I close off the gas as the pressure pushes it out. How do you balance this? Or do you occasionally close off the gas to get the fertiliser. Thanks!
Exactamente, lo que te ocurre es normal, ningún fluido va a ascender nunca por una tubería sin una fuerza que le obligue a ello. Si el consumo de gas es superior o igual al ritmo de producción la presión dentro del tanque va nunca a ser la necesaria para que el bioabono salga.
If you use a hot water recirculating pump to limit how much water you waste in your house waiting for hot water when you turn on a faucet, I think you can add more loop so that you can heat the reactor. less water waste, no need to worry about the temps dropping
Great tutorial. Whatehver, If You are stuck with diffrent designs, remember the basics. Digestion takes place în a sealed container, in order to be able to collect the gas.
Great Video, but why are the pipes extended to the bottom of the tank? couldn't we cut the gas pipe under the top directly ? the waster water pipe be plugged on the side of the tank at mid height ? and the sludge pipe cut under the top too ?
Love this design. I picked up a dozen IBC totes today and am using some for pig housing. I think I would do this design with a larger intake pipe, Something 6-12" in diameter. Would you foresee any issue with that? I'd like to be able to shovel manure into it. Also does the intake pipe need a cap? Great Work!
Very scientific explanation. I like your T fix method to prevent vapour lock. For a while, I was thinking about a single solution to purify both CO2 and H2S through a sustainable method. How about using NaOH or KOH solution to bubble through first? H2S becomes Na2S/K2S+H2O and CO2 becomes Na2CO3/K2CO3+ H2O. Then we can add a water container to bubble through to remove alkalinity in the gas in case. You can make the system locally sustainable if you use KOH solution made from wood-ash.
I will be trying this at home. I have a newly (black) painted IBC. I live in the tropics and will be placing my biodigester outdoors. Is there a maximum temperature I have to worry about?
if the hole in the gas pipe is above the water line, how does the slurry escape through the third pipe? how is the slurry pushed up the compost-tea above the water mark?
The hole in the slurry pipe is half way up the tank, and below the liquid level. as you feed waste and H2O into the feed tube, the level of slurry will rise, and will run off through the slurry pipe. That the methane builds inside the airtight tank (above the liquid level), it will offset the "pressure" that will build as slurry is added, then exit through the runoff tube. If no gas is consumed and the methane storage bladder is aloud to reach max capacity, the slurry level will be pushed down as the methane increases in volume, until it is pushed out the slurry hole and the gas escapes there too.
I just wanna ask something about the fertilizer outlet pipe, isn't it using a 3inch pipe? because I'm confused with the 2inch Tee and a 2 inch pipe. Any clarification is appreciated. Thanks.
So I’m currently doing vermicomposting, bokashi ferment and basic thermocomposting. Very curious about this as an addition or adjunct. Curious what the tea that comes out looks like under a microscope and how much gas can be produced from one of these on average. Seems like the amount of fertilizer out is the same amount of food waste in roughly.
I’m about to move into my RV and would like to build my own biogas system. I’d like to feed it through my black and gray holding tanks. I’m in Florida so the weather is hot but for ease of feeding the digester should I bury the IBC tank next to the RV like I’ve seen in one of your videos? And where is a good source to buy the tank? And the gas storage bags? Thank you:-)
Der Dünger ist ein nährstoffreicher flüssiger Komposttee. Es ist stark, so dass Sie es mit Wasser etwa 10 zu 1 oder 20 zu 1 verdünnen müssen. Sie können es sich wie die Flüssigkeit vorstellen, die aus einem Wurmkompostsystem kommt. Die zermahlenen Lebensmittelabfälle werden verdaut und treten als dünne Flüssigkeit aus. Sie gießen das einfach in einen Eimer mit Wasser und tragen es dann auf die Erde auf. Wenn Sie unserer Facebook-Gruppe beitreten, können wir viel mehr ins Detail gehen! Ich hoffe dich dort zu sehen. facebook.com/groups/methanogens
Just want to ask. So the digester is full? Bcoz the outlet dictates the level of water inside the tank right? And the gas pipe r we sure that its methane will come out and not the liquid?
Good day, I have some questions... - Why does the digester have to be fed at the bottom? Will some of the fresh material you throw in not float in the pipe? - How long does it take to produce fertilizer at optimum temperature? - There are different grades/types of steel wool, which one do I use to clean the gas of SO2? - How do the microorganisms get into the digester? Or are they on/in the food scraps that are thrown in? - I’m aware that the fertilizer is produced in the middle but what can I do with what floats at the top of the tank and what sinks to the bottom? Thank you
Hi ToffaX, please post these excellent questions to our facebook group "Solar CITIES Biogas Innoventors and Practitoners" and we can answer them better.
Hi all, liked the video and started collecting the various components. However there is a question on my side...the way that you are using the INLET & OUTLET, I fail to see how this will work as an automatic overflow, i.e. quantity feedstock in = same quantity of fertilizer out. When you fill the tank, doesn't the slurry level just increase in the tank ? From what I can gather, 75% of the tank volume = slurry, and 25% should be gas space ? So if I add feedstock, I would need to continue adding feedstock until the liquid fertilizer has moved up the outlet pipe until it eventually reaches the T piece and starts flowing into the bucket. If the gas valve is still OPEN, won't the designated 25% gas volume will now be full of slurry ? I guess that I'm overlooking something fundamental... please help me out here as it's a pity to get everything setup just to dismantle & do it again.
I keep my valve open all the time and let the water level push all the gas out into the storage bag. So my tanks are always overfilled with liquid. The uniseals hold the water pressure. If you keep the valve closed then the gas will build up in the tank and push the slurry up in both pipes. It will spill out the outlet because it is lower than the feed pipe.
So im interested in building one of these but i have 2 questions. 1st one is when you finish building it isnt there air inside the digester so it wont be preforming anaerobic restoration or am i over thinking this? 2. I live where 6 months out of the air its below freezing. Will that be an issue?
Excellent video!! Just a few questions: where can I order the bladder for gas storage? At what level or how long will it take to start producing gas? How was the food ground in the areas without electricity? Can I put animal (cow, dogs and donkeys) manure in it? Thanks for this, I will build this very soon.
LingahbytheSea I'll try to help. First I had the same question about gas bags as well as biogas appliances. They're easy to get in Asia especially India but no one seems to be importing them into the US. All the local gas bag producers are for industrial applications. In a pinch use car and truck tires. Used ones are dirt cheap or free and even new ones can be cheap. They can also be compressed to increase gas pressure. As to how long until they start producing usable gas? At least a couple of months depending on temperature and feed stocks, 2 to 3 months. It's a continuous feed set up so it's a one time issue. I'd try to load it up half way as soon as possible using whatever you can scrounge including grass clippings. As to grinding you can use hand crank meat grinders although I like the garbage disposals best of all. Spend the money and get the best you can get so they'll even take animal bones. It adds calcium to your compost. Grazing animals are best but any manure will work. If you are adding a lot of dog, cat and human manure add in grass clippings or another bulk source. You'll get better output and better compost. Some of the best are rabbit and guinea pig although full size pigs work as well. Just treat their waste like human and add bulking materials as a carbon source. Just keep the light and oxygen out like he says. You might add in a packet of septic tank microbes to get the process kick started. Not essential but it can speed up the start up.
so I'm guessing the fertilizer pipe doesn't exhaust gas because of the upper liquid layer of the compost creating a sort of "gas seal"? seems like it means it would take some time for the gas build up to start.
I'm sorry but I am trying to build one of these thing and am a little unclear on a few things. The uniseal is 2" but the hole is 3" the pipe is 2"??? Would it matter if I used a 3" uniseal on a 4" hole for the inlet and a 3" pipe? I ask because the plumbing on my house runs 3" pipe. Do I have to use a 3" or 4" pipe for the outlet if I use a 3" inlet pipe?
Uniseals are difficult to come by. INstead use crazy glue mixed with fine dry sand while gluing the pipes to IBC. Use some sort of flange on the outside of IBC to increase the area of glued connection and therefore strengthening it. Good silicone should work as well.
I saw it in India and all it consists of was a square brick trough, a metal container with bottom removed, and the trough was filled with animal cow pat's and then the metal box put on top, a pipe came from the box to a cooker, and that was that. Brick+ box +pipe =free gas. Government in the UK would rather you died from cold than have anything free.
I am having issues in that my slurry pipe is not producing. My tank is now full, but nothing is coming out of the slurry pipe. In fact it is so full that it has blocked by gas outlet, and is forcing gas out the seals. I have ran a rod down the pipe thinking their could be blockage, but this has not cleared the pipe. I have liquid in the pipe at the top of the IBC, but it isn't forcing it up and out. Can you explain the issue and the solution?
Would it be possible to build a digester out of a 12 inch PVC pipe and lay it horizontally? Feed it on one end, take the gas from the top and take the slurry from the far end? If so, this would open up a lot of possibilities as to where you could put it, and it would make it easier to connect it to your sink and its garbage disposal.
Hi Thomas, Interested in this gas collection system. Can I ask how you stop the pressure in the gas holder pushing back into the digester? I had an issue with slurry being pushed out of the feed and effluent pipes. Anyway all the best. Tanc
Thomas - I'm kinda obsessed with this topic for the various food waste reduction, reduced carbon footprint, and alternative fuel reasons and have been watching a number of your well-done how-to's - thanks!! I'd love to see what setup you did for the under-sink version at 6:24 as something that would work for we house- and apartment-dwelling masses? I've been all over your Solar CITIES website, too...love the mission! Cheers
Great video tutorial. Question about the hydrogen sulfide byproduct from anaerobic digestion which can be an issue. Is this an issue for residential biogas generators? if so, how can this issue be mitigated.
Mitigation is via a gas scrubber. The bio gas produced bubbles through a container of water with bleach added, and then through another filled with wire wool. This process removes the hydrogen sulphide which corrodes steel plumbing fittings and compressed gas storage tanks, and removes the C02. The next vessel holds cat litter to absorb the H2O and dry the gas before passing clean and dry into the storage device. Unscrubbed gas burns orange like the flame in this video. Clean scrubbed gas burns colourless in daylight and blue in a dark environment. Loads of You tube vids show how to make a bio gas scrubbing system to attach to the digester.
3:48 about PLUG-FLOW digestor design. Wont material remain in the input pipe that will basically be full to the fill line? Does it require an air-tight push plunger? to start the system you must fill it to the fill line? Also, the exit fertilizer pipe is open at the bottom? it's touching the bottom? Any filters or scrubbers? Will a system like this work in Florida for a solo off grid where it will be fed by table scraps and human bathroom?
thanks for the tutorial, I'm collecting information to try one by myself. I've just one question: for the T that comes out for the liquid fertilizer, the top should remain cover until i feed the tank, or it just open all the time? i'm not getting that part, I'm thinking that oxigen will get in via that open T top... thanks again!
I believe if you make a seal for the top of slury out, it will create a ciphon and the contents of the digester will empty if you have the external pipe going into a bucket. The slury pipe has the hole half way down the IBC, so no oxygen can get in too, closed system.
You can keep it open, the water creates an airlock. But yes I would get a cap for it but drill holes in the side, almost like a chimney top so no rain can enter.
Hi, Good video! The way you feed it and draw off, the heights of your pipes where you draw off will be the the height of your liquid, how do you keep the fluid out of your gas line?
Gas generated floats on top of the fat-oil-grease or F.O.G; which will escape through the whole drilled on the blue pvc pipe near the top the IBC tank for maximum gas collection. As far as the fluid and gas getting mixed up goes, well they won't because the gas escape whole is up near the IBC upper wall, where the liquid fertilizer intake perforation is around the middle of the fluid within the system. And remember, if you feed five litters of new grounded food material into the biodigester, an equivalent of five litter of liquid fertilizer will be forced out...It is simply a mass balance kind of situation. I hope this helped clearify this system. DISCLAIMER- I don't work for this company; However I am a Hydraulic Engineer and I believe in knowledge sharing. Cheers!
I am Kenya where there is plenty of sunshine through out the year. I have a biogas system (50 litres) it's like it is not working... I did set it up on my balcony but for about a month now I haven't gotten any gas from it. What could be the problem?
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
*I'll definitely build one of these within the next 5 years. I'll add it to my list of things to build. Everyone ask me again in 5 years if you see this comment!*
4 years to go, clock’s ticking! :’)
Imagine how many hot meals you cook or have cooked for you in 5 years, how about this year?! 🙏
3 years left
Better start collecting the materials 😊
@@adamdoig1448 I call next years message😉😂
Already been 2 years better get started
The most informative video on this subject that I have found yet. Thank you.
this is gold. million of people should see and do this.
This a trippy ass way to explain it in the opening. I like it. Simple construction instructions.
This is the best I have seen. Simple and informative and motivational at the same time. Very good.
I've been thinking of this for a while and was looking for a good "how to" video, so thanks - I can't give you enough upticks! All the ideas I had were complicating the whole thing far too much. This is simple and doable and I can't wait to get started. Best wishes.
I am not sure if you build one already. If not try to build it with a 4" Feed in Pipe in the center and incorporate a stirrer
@@gustav-adolfschildt I’m about to start building one, have several 330 totes available and even have a long piece of 6” pvc and 10” pvc female ends that I picked up on Craigslist for $20, any tips you can give me? 6” too big, 4” better? 🙏🏼🙏🏼🙏🏼
I’ve seen some people use double blow up mattresses to store the gas, if you can’t find bladders. Then you could tee them together to increase capacity. On the plus side, it would allow you to put a flat board on top of the stack and sandbag it to give the required pressure, instead of pumping!
Any possible links to videos on how to connect that to this system?
THIS IS THE BEST DESIGN I HAVE SEEN SO FAR
I AGREE! THIS MAKES ME REALLY FEEL LIKE I CAN DO IT MYSELF!
agree been studying up on the subject uses materials that I can get a hole of
concise, clear, and no bs! thank you!
Excellent, so inspiring, thank you! I can't wait to implement this on my off-grid finca
I'll pile on the accolades. Phenomenal video.
Aside from the victimization 'hook' at the beginning, this was an extremely well done video. Straightforward and understandable.
I read "The Handbook of Homemade Power" when I was 14.. and studied deeply on these.. I had dug a hole in the yard, gotten barrels and many of the other parts, unfortunately, my parents made me fill the hole back in and I never finished. You have re-inspired me... Maybe I will build one of these for my farm sometime soon. There are 2 best temperature zones for anaerobic digestion 90 degrees F and 120-130 F. My thought is to tie this in to my greenhouse thermal mass system and use the excess heat to help better regulate the digester temps. Thanks for sharing!
What a fantastic video, so well explained and inspiring.
best video on the subject right now I'm sleeping in my car, lost my home due to Hurricane Micheal when it hit Florida, On social security due to Parkinson. could not afford house insurance. Probably get me a utility building next month to live in and maybe a use RV in 6 months,, Just got power back yesterday got a tent set up as well Studying up on as many ways as I can that I can be off the grid,, I do have to have the power lines running to my new place, but I will be using my power as much as possible
This is a great solution for off-grid living and I plan to build a system like this to manage off-grid waste. However I must point out that in several of your examples you show biogas stored in bags in areas where if they were exposed to a source of ignition a serious fire or explosion could occur. I feel that unless someone is properly trained in how to store gas safely they should not attempt it without professional help. these gas bags are only safe if stored outside and away from any buildings and should be fenced off with warning signs like you would find at a gas station. People could be seriously injured or killed by the amount of gas these bags can hold. Never store these bags inside a building. You should note this in your video. Other than that this is really great technology that should be used more. I am working on a way to use the waste gas to heat the digestor to keep the bacteria happy in a cold climate and make the process more effective than a septic waste disposal system.
Top video.
Looking forward to the video to teach how to scrub the gases produced of all impurities that will lead to the corrosion of pressurised storage and plumbing.
one wonders how one missed this video... great job!
Thank you so much for sharing. I have been eye balling this biogas stuff for awhile now. But trying to think about its viability here in Canada. I think after seeing this that I have found the solution here. This should complete my off grid system very nicely. Again thank you!!!!!
You guys are amazing! This is absolutely priceless!
Thanks a lot for this video! It the exact amount of intentionality and detail that I want! You rock.
That is for taking the time to share those folks 👍💓🙏
I have considered this for my home, but the things I have read indicate a small amount of gas is produced in a household sized system.
This lead me to think of what else it could be used for, and I came to the conclusion that a green/grow house, lit/heated by gaslight would make sense.
When I search for information on growing plants by gaslight, I get either ancient information, or weed growers referencing that ancient information to use with electrical light.
I think a building that processes compost through chickens and the chicken waste through a biogas system, while growing plants, and producing fertilizer, would be a good fit in lots of urban areas.
Thanks to Mashav 2017, I had a hands on training on this simple but very useful technology. I hope to use it basically solve sanitation problem and use the efflueut to plant vegetables
Great job on the illustration.
Incredible, inspiring and so informative thank you!
Thank you from Zimbabwe. 2021 lockdown project.
Best video I have seen thus far. Many thanks.
Brilliant explanation and design, thank you for sharing!
Thank you for this video. It is exactly what I have been looking for. Now I can build one. Cheers
Very good technique and presentation.
Would this work coupled with a black soldier fly cultivation unit?
To use the worms to pre grind the biomass and use what nutrients they can for a more useful/valuable resource (food or feed), then make biogass from what remains?
I love it was a great information i will do this once i got back from my country
Awesome video, thanks! Quick question. I've built the 3ibc system. Now that it's all connected and producing gas, my slury out pipe is never exiting fertilizer. It does when I close off the gas as the pressure pushes it out. How do you balance this? Or do you occasionally close off the gas to get the fertiliser. Thanks!
Exactamente, lo que te ocurre es normal, ningún fluido va a ascender nunca por una tubería sin una fuerza que le obligue a ello. Si el consumo de gas es superior o igual al ritmo de producción la presión dentro del tanque va nunca a ser la necesaria para que el bioabono salga.
Hi, wonderful video. Very clear. It´s there a possibility to get a list of materials please? Thanks
If you use a hot water recirculating pump to limit how much water you waste in your house waiting for hot water when you turn on a faucet, I think you can add more loop so that you can heat the reactor. less water waste, no need to worry about the temps dropping
BEAUTIFUL!!!Can't wait to build one!! THANKS!!!!!!!!!!
5 years later, how did it turn out?
Great tutorial. Whatehver, If You are stuck with diffrent designs, remember the basics.
Digestion takes place în a sealed container, in order to be able to collect the gas.
Thank you very much for sharing with us all your knowledges about biogas. Thanks for your practical and clever ideas.
You might consider marking the pipes above the top of the tank, to indicate which direction the cuts and holes below.
Awesome video tutorial. I'm definitely going to make one to heat water.
O my friend how I so agree with what you said at the start of your very well made video. God bless you and keep you and thank you 👍
Great Video, but why are the pipes extended to the bottom of the tank? couldn't we cut the gas pipe under the top directly ? the waster water pipe be plugged on the side of the tank at mid height ? and the sludge pipe cut under the top too ?
I had the same question. But since he uses a uniseal, it prevents the pipe from sliding further in. In other words, the height can be maintained.
holy shit so many great ideas for sustainability. I personally love the idea of using hot shower waster water for heating of the biogas generator
Love this design. I picked up a dozen IBC totes today and am using some for pig housing. I think I would do this design with a larger intake pipe, Something 6-12" in diameter. Would you foresee any issue with that? I'd like to be able to shovel manure into it. Also does the intake pipe need a cap? Great Work!
Michael Carey I now routinely use 4 inch pipes for inlet for the past 4 years. Works much better, yes.
How has this turned out for your farm?
Great stuff, I'm yet to try this in Mzansi(S.Africa) My country men don't share information. Once again great stuff
Thank you so much for such a great video explaining and proving this can be done :)
Thanks for sharing.
Does the 2nd pipe have one hole or is it on both sides?
Again Thank you
Very scientific explanation. I like your T fix method to prevent vapour lock. For a while, I was thinking about a single solution to purify both CO2 and H2S through a sustainable method. How about using NaOH or KOH solution to bubble through first? H2S becomes Na2S/K2S+H2O and CO2 becomes Na2CO3/K2CO3+ H2O. Then we can add a water container to bubble through to remove alkalinity in the gas in case. You can make the system locally sustainable if you use KOH solution made from wood-ash.
nice!
Can someone point to WHAT this would look like and how to do it. Thanks
in cold climates placing the digester in the ground surrounded by grass clippings would likely increase the heat of the tank.
I would use strawbales covered with something waterproof..very cheap and god insulator
Great video!
I’m thinking of using this system for vermicomposting with some adjustments. Do you think that’s possible?
Thanks!
The gas would kill the worms. Worms would also drown.
How much gas, if everything is optimized, should you get on a daily basis? Enough to heat an average sized house in a moderate climate for a day?
I will be trying this at home.
I have a newly (black) painted IBC. I live in the tropics and will be placing my biodigester outdoors. Is there a maximum temperature I have to worry about?
This is fantastic information.
if the hole in the gas pipe is above the water line, how does the slurry escape through the third pipe? how is the slurry pushed up the compost-tea above the water mark?
gas that is produced pushes the slurry out
The hole in the slurry pipe is half way up the tank, and below the liquid level. as you feed waste and H2O into the feed tube, the level of slurry will rise, and will run off through the slurry pipe. That the methane builds inside the airtight tank (above the liquid level), it will offset the "pressure" that will build as slurry is added, then exit through the runoff tube. If no gas is consumed and the methane storage bladder is aloud to reach max capacity, the slurry level will be pushed down as the methane increases in volume, until it is pushed out the slurry hole and the gas escapes there too.
I just wanna ask something about the fertilizer outlet pipe, isn't it using a 3inch pipe? because I'm confused with the 2inch Tee and a 2 inch pipe. Any clarification is appreciated. Thanks.
So I’m currently doing vermicomposting, bokashi ferment and basic thermocomposting. Very curious about this as an addition or adjunct. Curious what the tea that comes out looks like under a microscope and how much gas can be produced from one of these on average. Seems like the amount of fertilizer out is the same amount of food waste in roughly.
Excellent must try to build this
I’m about to move into my RV and would like to build my own biogas system. I’d like to feed it through my black and gray holding tanks. I’m in Florida so the weather is hot but for ease of feeding the digester should I bury the IBC tank next to the RV like I’ve seen in one of your videos? And where is a good source to buy the tank? And the gas storage bags? Thank you:-)
I dont understand the fertilizer... how does it work (please in simple englisch, i am from Germany)
Der Dünger ist ein nährstoffreicher flüssiger Komposttee. Es ist stark, so dass Sie es mit Wasser etwa 10 zu 1 oder 20 zu 1 verdünnen müssen. Sie können es sich wie die Flüssigkeit vorstellen, die aus einem Wurmkompostsystem kommt. Die zermahlenen Lebensmittelabfälle werden verdaut und treten als dünne Flüssigkeit aus. Sie gießen das einfach in einen Eimer mit Wasser und tragen es dann auf die Erde auf. Wenn Sie unserer Facebook-Gruppe beitreten, können wir viel mehr ins Detail gehen! Ich hoffe dich dort zu sehen. facebook.com/groups/methanogens
Just want to ask. So the digester is full? Bcoz the outlet dictates the level of water inside the tank right? And the gas pipe r we sure that its methane will come out and not the liquid?
this is a better design that i watch
Excellent video
Good day,
I have some questions...
- Why does the digester have to be fed at the bottom? Will some of the fresh material you throw in not float in the pipe?
- How long does it take to produce fertilizer at optimum temperature?
- There are different grades/types of steel wool, which one do I use to clean the gas of SO2?
- How do the microorganisms get into the digester? Or are they on/in the food scraps that are thrown in?
- I’m aware that the fertilizer is produced in the middle but what can I do with what floats at the top of the tank and what sinks to the bottom?
Thank you
Hi ToffaX, please post these excellent questions to our facebook group "Solar CITIES Biogas Innoventors and Practitoners" and we can answer them better.
I'm looking to maybe build one, is this designed just as good as prebuild ones?
Hi all, liked the video and started collecting the various components. However there is a question on my side...the way that you are using the INLET & OUTLET, I fail to see how this will work as an automatic overflow, i.e. quantity feedstock in = same quantity of fertilizer out. When you fill the tank, doesn't the slurry level just increase in the tank ? From what I can gather, 75% of the tank volume = slurry, and 25% should be gas space ? So if I add feedstock, I would need to continue adding feedstock until the liquid fertilizer has moved up the outlet pipe until it eventually reaches the T piece and starts flowing into the bucket. If the gas valve is still OPEN, won't the designated 25% gas volume will now be full of slurry ? I guess that I'm overlooking something fundamental... please help me out here as it's a pity to get everything setup just to dismantle & do it again.
I keep my valve open all the time and let the water level push all the gas out into the storage bag. So my tanks are always overfilled with liquid. The uniseals hold the water pressure. If you keep the valve closed then the gas will build up in the tank and push the slurry up in both pipes. It will spill out the outlet because it is lower than the feed pipe.
So im interested in building one of these but i have 2 questions. 1st one is when you finish building it isnt there air inside the digester so it wont be preforming anaerobic restoration or am i over thinking this? 2. I live where 6 months out of the air its below freezing. Will that be an issue?
Great video.
Do you have a step by step instructions coupled with this video? Also could I use this to power my car!?
What paint are you using... I painted my IBC black, and it flaked off in big chunks within a year... I roughed up the surface and primed it too...
Can the feeding pipe NOT touch the base of the tank, but feed the kitchen scraps to the middle depth instead?
I didnt go throught all the comments but is there a link to the pvc balloon, either make or buy? Thanks
Excellent video!!
Just a few questions: where can I order the bladder for gas storage?
At what level or how long will it take to start producing gas?
How was the food ground in the areas without electricity?
Can I put animal (cow, dogs and donkeys) manure in it?
Thanks for this, I will build this very soon.
LingahbytheSea I'll try to help. First I had the same question about gas bags as well as biogas appliances. They're easy to get in Asia especially India but no one seems to be importing them into the US. All the local gas bag producers are for industrial applications. In a pinch use car and truck tires. Used ones are dirt cheap or free and even new ones can be cheap. They can also be compressed to increase gas pressure.
As to how long until they start producing usable gas? At least a couple of months depending on temperature and feed stocks, 2 to 3 months. It's a continuous feed set up so it's a one time issue. I'd try to load it up half way as soon as possible using whatever you can scrounge including grass clippings.
As to grinding you can use hand crank meat grinders although I like the garbage disposals best of all. Spend the money and get the best you can get so they'll even take animal bones. It adds calcium to your compost.
Grazing animals are best but any manure will work. If you are adding a lot of dog, cat and human manure add in grass clippings or another bulk source. You'll get better output and better compost. Some of the best are rabbit and guinea pig although full size pigs work as well. Just treat their waste like human and add bulking materials as a carbon source. Just keep the light and oxygen out like he says. You might add in a packet of septic tank microbes to get the process kick started. Not essential but it can speed up the start up.
If you are using excrement you have to be mindful of pathogens.
... not if it's your own excrement, for your own end product
you think your shit does not have parasites etc?
I will do this for sure...
Hey, it's been 2 years. Have you tried? How did it go? Thanks
Did it work?
wonder why theres only comments from 3 years ago..must be shadow banned
As an avid follower of your channel, I'm curious, did you do this? Did I miss a video on it?
Can you feed the gas to a compressor? Still using the bag as an in-between?
Hello, could you please tell me where in Swaziland you built the digester?
so I'm guessing the fertilizer pipe doesn't exhaust gas because of the upper liquid layer of the compost creating a sort of "gas seal"? seems like it means it would take some time for the gas build up to start.
I'm sorry but I am trying to build one of these thing and am a little unclear on a few things. The uniseal is 2" but the hole is 3" the pipe is 2"??? Would it matter if I used a 3" uniseal on a 4" hole for the inlet and a 3" pipe? I ask because the plumbing on my house runs 3" pipe. Do I have to use a 3" or 4" pipe for the outlet if I use a 3" inlet pipe?
I don't think it matters how you seal the pipes, silicone would do the job, just mach the hole close to your pipe size..
awsome?
Uniseals are difficult to come by. INstead use crazy glue mixed with fine dry sand while gluing the pipes to IBC. Use some sort of flange on the outside of IBC to increase the area of glued connection and therefore strengthening it. Good silicone should work as well.
I saw it in India and all it consists of was a square brick trough, a metal container with bottom removed, and the trough was filled with animal cow pat's and then the metal box put on top, a pipe came from the box to a cooker, and that was that. Brick+ box +pipe =free gas. Government in the UK would rather you died from cold than have anything free.
I am having issues in that my slurry pipe is not producing. My tank is now full, but nothing is coming out of the slurry pipe. In fact it is so full that it has blocked by gas outlet, and is forcing gas out the seals. I have ran a rod down the pipe thinking their could be blockage, but this has not cleared the pipe. I have liquid in the pipe at the top of the IBC, but it isn't forcing it up and out. Can you explain the issue and the solution?
Thanks for the response. It did start flowing a few days after I posted.
Would it be possible to build a digester out of a 12 inch PVC pipe and lay it horizontally? Feed it on one end, take the gas from the top and take the slurry from the far end?
If so, this would open up a lot of possibilities as to where you could put it, and it would make it easier to connect it to your sink and its garbage disposal.
Hi Thomas, Interested in this gas collection system. Can I ask how you stop the pressure in the gas holder pushing back into the digester? I had an issue with slurry being pushed out of the feed and effluent pipes. Anyway all the best. Tanc
Thomas - I'm kinda obsessed with this topic for the various food waste reduction, reduced carbon footprint, and alternative fuel reasons and have been watching a number of your well-done how-to's - thanks!! I'd love to see what setup you did for the under-sink version at 6:24 as something that would work for we house- and apartment-dwelling masses? I've been all over your Solar CITIES website, too...love the mission! Cheers
Awesome video and design!!!😎👍
How does this design differ from your previous design which used 3 IBC tanks? Was the pressure from the 3 tank system worth the effort? Thanks!
Great video tutorial. Question about the hydrogen sulfide byproduct from anaerobic digestion which can be an issue. Is this an issue for residential biogas generators? if so, how can this issue be mitigated.
Mitigation is via a gas scrubber.
The bio gas produced bubbles through a container of water with bleach added, and then through another filled with wire wool. This process removes the hydrogen sulphide which corrodes steel plumbing fittings and compressed gas storage tanks, and removes the C02.
The next vessel holds cat litter to absorb the H2O and dry the gas before passing clean and dry into the storage device. Unscrubbed gas burns orange like the flame in this video.
Clean scrubbed gas burns colourless in daylight and blue in a dark environment.
Loads of You tube vids show how to make a bio gas scrubbing system to attach to the digester.
Awesome explanation. Thanks. Must try
In transmitting of the gas to the kitchen could any type of pipe be use
3:48 about PLUG-FLOW digestor design. Wont material remain in the input pipe that will basically be full to the fill line? Does it require an air-tight push plunger? to start the system you must fill it to the fill line? Also, the exit fertilizer pipe is open at the bottom? it's touching the bottom? Any filters or scrubbers? Will a system like this work in Florida for a solo off grid where it will be fed by table scraps and human bathroom?
thanks for the great vid. What's the best forum for questions on biogas systems?
beautiful. you've perfected it. i'll build one this spring. thanks.
did you build it?
thanks for the tutorial, I'm collecting information to try one by myself. I've just one question: for the T that comes out for the liquid fertilizer, the top should remain cover until i feed the tank, or it just open all the time? i'm not getting that part, I'm thinking that oxigen will get in via that open T top... thanks again!
That's the same here...I dont get this part...if uve a solution, post it here pls...thx in advance bro! :)
I personally cover it, but mainly because I live in a place that rains a lot and I don't want it to fill with rainwater
I believe if you make a seal for the top of slury out, it will create a ciphon and the contents of the digester will empty if you have the external pipe going into a bucket. The slury pipe has the hole half way down the IBC, so no oxygen can get in too, closed system.
You can keep it open, the water creates an airlock. But yes I would get a cap for it but drill holes in the side, almost like a chimney top so no rain can enter.
TH You rock! Thanks for making this instructive video - very useful for teaching!
Could someone explain how you would have fertilizer output when you have a hole halfway up the fertilizer output pipe?
Marker 4:50 "to remove" stuff "should it arise". LOL! Let's hope it doesn't arise. I live in a suburban area can I do this w/o serious issues?
I’m wonder if you can use this on a home septic system?
What color should the tank be for use in the U S (South Carolina, for example)?
Hi, Good video! The way you feed it and draw off, the heights of your pipes where you draw off will be the the height of your liquid, how do you keep the fluid out of your gas line?
My thought as well. Did you ever figure it out?
Gas generated floats on top of the fat-oil-grease or F.O.G; which will escape through the whole drilled on the blue pvc pipe near the top the IBC tank for maximum gas collection. As far as the fluid and gas getting mixed up goes, well they won't because the gas escape whole is up near the IBC upper wall, where the liquid fertilizer intake perforation is around the middle of the fluid within the system. And remember, if you feed five litters of new grounded food material into the biodigester, an equivalent of five litter of liquid fertilizer will be forced out...It is simply a mass balance kind of situation. I hope this helped clearify this system. DISCLAIMER- I don't work for this company; However I am a Hydraulic Engineer and I believe in knowledge sharing. Cheers!
@@harissououro4335 o
I am Kenya where there is plenty of sunshine through out the year. I have a biogas system (50 litres) it's like it is not working... I did set it up on my balcony but for about a month now I haven't gotten any gas from it. What could be the problem?
Isnt this essentially a septic tank only with a funnel from the kitchen added?