Thank you. I really appreciate the support.

all the realistic productive people in the world think the same , we don t care for the decoration we only want the butter

I stand to be corrected but sure I saw a comment also regarding prevention of steel degradation to the most vital and dangerous item for storage. The tank itself.

My pleasure. Thank you for the comment.

I have heard biogas could have up to 1% h2, but for some reason last year when I had my gas tested hydrogen wasn’t anywhere on the sheet. Next time I’ll have to ask them if there’s a way to check that too. I can’t find a colorimetric tube for it. Do you install multiple brands of CNG kits or just one? Can you plug one here? What do you think the chances are they sponsor me a kit for a video? I appreciate your comment.

@@BiogasUSA I haven't found a way to measure H2 either, that's why I stopped doing it, but I might start again because I found yesterday that my type 4 cng gas tank is compatible with RNG. We install systems by Lovato, BRC, Stag etc. There are a lot of LPG and CNG cars here in Greece but I can't tell you something about sponsorship as this is a joke around here. I know people who use RNG in type 1 steel tanks but I think it's a risk. There are ways to get rid of the CO2 to turn biogas to RNG which is more powerful. I might try such techniques but maybe in 6 months as I don't have the time now. Maybe you should give it a try and make a video about it. Oh and buy a type 4 carbon tank and get rid of this rusty steel one!

@@vasilispants8241 what are the ways to get rid of the co2? The best I could do so far was 60% ch4.

@@BiogasUSA If you google "How to eliminate CO2 from biogas" you will find many pages on the internet. All professional plants have scrubbers for CO2, hydrogen sulphide, siloxanes and moisture that turn raw biogas into RNG which is 97% methane and is practically the same as CNG. There are many methods and I am sure you will find one that suits you. I will try the water and iron wool one.

@@vasilispants8241@ vasilispants8241 I would go with 2-stage membrane separation, H2S removal (Activated Carbon Filter) before being compressed, moisture removal by refrigeration to 40-60F (4.4-15C), this also removes VOCs which kill your membrane and then into the 2-stage membrane separation. This should give you two separate streams of 99% CH4 and CO2. CO2 to the atmosphere or recover and CH4 to your Storage tank.

Sure thing.

That’s interesting what do you call that system? Any videos on that?

The brass fitting turns out of the tank like a normal propane fitting

Thanks for the heads up. I’ll look there if I ever need another.

I just attach the inner tube to the tube coming out of the digester and wait for it to fill up.

Those are off the shelf for like 12 to 20 bucks. I prefer the hose version, with a valve on it. The hose lets me set the 1 lb can on a scale, and make sure I don't overfill it.

That’s a great question. Watch my most recent video, it’s on just this topic and there is some great discussion in the comments.

from some of the other videos i have watched, the gas burners on a stove in order to burn it are different so i would assume that a furnace would also be different

The pressure is the same, but you have to use different size orifices for propane and natural gas appliances. They have very different heat values

on all the other DIY Bio gas set ups they say the wholes on the burn end need to be bigger, but they may be soley due to the fact the pressure of flow from a tire is nothing like a tank. IDK just a thought from deduction@@hangfire5005

I looked this up earlier, with this method the gas is methane so natural gas appliances are compatible. look it up and research it, so you have a better understanding of the difference. I looked it up to see what appliances would work best with bio gas system because I will be building off grid and want alternatives to consider that will benefit the new homestead. it should power a tri fuel generator as well for electric to top off a solar battery bank on cloudy or bad weather days. lot of uses for this system.

Hey all. I have a video where I convert a propane turkey burner to biogas. I use it often and it works great. I want to try to convert some more things. I have a small natural gas powered furnace I need to tinker with some more. Even though natural gas is methane, biogas doesn’t always work as a plug and play fuel source for NG appliances because biogas is so much more lean. That said, with some modifications I’m confident we can convert anything that runs on gasoline, propane or natural gas.

I like that idea actually

I don't know what kind of compressor is safe. I'm just making it up as I go and trying to recognize and mitigate risk as I go along. I don't know much about hydrogen either, but I am curious. Where are you getting it?

No I don’t. Since it had propane in it before, I’m not too worried about oxygen in the tank.

This is where I got the filters from. Looks like I paid $26 USD for each. a.co/d/gvGm5cQ

Hey Joshua. I guess that would depend what I'm using it for. I had about 30 psi in a tank and I was able to boil a few gallons of water for an hour

Depends on the bed some are single and some are double and depending only what your use it

Check out phase diagrams it depends on the temperature and pressure of the gas. if you filter it or to approximate it you could just assume it's all methane

Any gas will turn to liquid when it reaches its vapor saturation pressure. Propane saturation pressure is around 300psi Methanes vapor saturation pressure is close to 900psi These values vary by temperature also, as mentioned already.

So you need scuba tanks 😂

Biogas can be used to generate the energy to run the compressor also. That would be the end goal. Follow to see me convert a generator to biogas.

Send the questions my way. I just make stuff up as I go, but I’ll be happy to try to figure it out with you.

That’s a fair concern, I’m still concerned with that every time I go to compress. You need to be very careful to make sure there is no oxygen in the system before you start the compressor.

This will depend on so many things. My dogester is 30 gal. When the average temp outside is 90F and I have been feeding the digester daily I can fill an inner tube in a single day.

amzn.to/45juHEX

Between 2 and 3 lbs. I can’t get any higher than that without starting to leak out the bulkhead fittings on my digester.

that what i thought

This is the link amzn.to/45juHEX

I am certain that you could, there is a gasification facility nearby me, they pipe their gas to nearby plants where it gets processed along with natural gas from oil wells.

Thank you for this feedback. I’m going to make another filter video soon. I have since added molecular sieve beads and silica beads. I believe the silica will absorb oxygen.

Yessir. The compressor will overheat almost instantly without it.

That’s a great question. It came with the compressor so… I have no idea. I should probably find a particulate filter with a known pressure rating.

I can’t do that because I don’t have a purge valve, but this tank still had propane in it when I started so I just have always kept some positive pressure on it to prevent oxygen getting in. (I have had my gas tested to ensure this has been successful) You’re using the word “air” in place of “gas”. Since nothing in my tank is going to be liquid, its a little different. The only thing I’m concerned about is O2 specifically. If the tank was open and empty before I started I would purge it by filling it with biogas, and then open the valve and let it vent almost to atmosphere. I would repeat this process 3 or 4 times and then (because I can) I would have the contents of the tank tested for 02 to ensure levels are below acceptable thresholds. This was a really good question. I love liquid gas and one day aspire to liquify biogas hahaha. I suspect a small cryo plant is the most efficient way to purify ch4 enough to maybe run a vehicle.

​@@BiogasUSAmost of those types of tanks have them in the valve itself, typically a flat head you back off, looking at the video I think yours might be the opposite of the inlet/outlet port on the valve but be cautious if you open it there are times they won't seal once you open them if they haven't been used in a while. Thanks for the answer, great idea.

@@BiogasUSA also yes I guess gas is probably a better way of saying it, good point on the LP obviously is liquid lol, I wasn't sure how you would get any unwanted gas out of a tank if it had been depleted, but your answer makes sense

It can’t explode because there is not enough oxygen. Methane lower explosive limit (LEL) is 5%, the upper explosive limit (UEL) is 15%. Being my gas is almost 60%methane it is far too rich for combustion. This is why I am very careful to purge oxygen from my system before I start.

sketch lol@@BiogasUSA

@@BiogasUSA I would be more worried about the Methane you used to purge the line between the bottle and compression and the tyre and compressor, as this is now in the atmosphere, next to a Non-Hazardous area-rated compressor in a non-ventilated room, but you didn't blow up this time. All you need is the LEL at 5% and a static spark (from clothing), or wiring in your shed that is bad and you are history. I would do this in a well-ventilated (No walls) space with no roof, as a roof will capture any Methane. I like the idea of compressing the methane as less storage space is required.

Great points. Thank you so much for the safety tips.I’ll ad these to the description. My setup has changed quite a bit since this was filmed. If I ever film an update I’ll be sure to include these safety points also. I have no prv or anything, the gauge you saw I added is the only measure to protect from over pressuring.

They aren't filling it as high pressure as a standard tank.

I think this is an affiliate link to Amazon, does it work? Compressor

Not yet, I haven't attempted that but I will make a video soon when I do. Thank you for the suggestion.

Two things @mattycastaway. I am working hard to produce a more pure methane, so I don’t want to dilute it with all the nitrogen in the atmosphere. Also, if methane and oxygen mix in the right quantities there is a chance it could explode. For these reasons I do my best to purge all air out of the system.

Not sure on the brand. Compressor was about $300. I think it's about the cheapest in its class. Here's the link www.amazon.com/dp/B07VM6MPC3?ref_=cm_sw_r_apan_dp_PKFV0BX8PF2E8518ZCFQ

@@BiogasUSA Thanks Nate.

@@BiogasUSA am very much interested in compacting biogas for commercial purposes but don't know what compressor to use

I got it from here. Let me know if this link doesn't work. a.co/d/9Cqokh8

@@BiogasUSA awesome thanks

Yessir in the description

​@BiogasUSA Same question do you have link looked in description and don't see it?

amzn.to/45juHEX

Yessir the filter housings are designed for filtering water. Since I am filtering gas I thought it best to run them backwards so flow travels down the center tube and out. If I was using a liquid filter like a water bubbler especially that would prevent the water from running out the tube and traveling downstream.

Yes. This is what I used www.amazon.com/dp/B003JMRJ6Y/ref=cm_sw_r_as_gl_api_gl_i_8C9T3WTSN8NYJN4M33ES?linkCode=ml2&tag=nateslink-20

I do agree. Although my oxygen levels in the lpg tank are very low, I can still get them lower and add to my own convince with larger gas storage vessels. I considered a mattress, but instead of buying something new, I have since plumbed the two innertubes together as one. Thank you for the idea.

To my knowledge, no. I think you can even build a car that runs off biogas and operate it on the road without any special permitting.

Good tip. Thanks for the heads up on that.

Yes, h2s is very water soluble. Bubbling biogas through water it will dissolve very quickly and stay with the water.

@BiogasUSA just normal tape water do not need to need minerals or chemicals to water and how often does water need to be replaced

Thank you. I appreciate that. There are commercial digestion plants out there. I know some of them truck cow manure in and digest it. They have proper gas plant equipment attached so they are exporting pipe gas, identical to the natural gas derived from petroleum. That said, it’s fun for me to get close to the source of things. To understand how they work and where they come from. Thanks for the comment.

Greetings! Welcome.

Hahaha I understand. On the filter full of water if I ran it with the arrows it would suck the water up the pvc like a straw instead of bubbling the gas through it. I actually have this problem sometimes if the gas tries to run backwards. Since filming this video I have relocated the filters to between the digester and the inner tube so the gas passes through a little more slowly. Sometimes if I have a big temperature swing (from hot to cold) the liquid mass inside the digester physically shrinks and sucks the water out of that filter and into the digester.

and be usable in carbonate drinks ?

@@mlionea yes, in fact many welders buy CO2 from a pub.

it would have to be converted to cng first but yes

@@bussafushiguro6064 ok that might make small scale farm digesters more worthwhile, many people wouldn't bother installing one to save maybe €300 per year on cooking gas. People wouldn't even bother to save maybe €1000 on home heating. However, if they could add a saving of €3000-€4000 on car or tractor running costs, that might be a game changer

I know it’s possible to run a car with biogas, but I have not yet figured out how to make it pure enough to justify the cost of the cng kit.

Just compressed. For methane to be liquid it needs to be very cold -250F, or very compressed (around 2000psi if I remember correctly)

Yes, h2s is the first problem. Nothing will eat ferrous metal as fast as h2s and biogas has large quantities of it. After than, moisture is the next problem. I’m hearing now that the 1% hydrogen in biogas could make the walls of my tank brittle too.

I will take this into consideration. Thank you for the feedback.

Some people really do just look for any reason at all to be offended... *Facepalm*

...says the person with literally NO useful content to share on their own KZfaq channel! Thank the man for the amazing technical content of his video or say what you liked about his setup also? I have sensory processing disorder and am sensitive to this kind of thing too but there's no WAY I'd be so self absorbed to criticise this man when he's doing such an amazing service to us all with this information! 🙄

This is a two stage compressor, it will compress up to 6,000psi, however the propane tank I am using would rupture long before I got there. Because of the much lower vapor saturation pressure of Propane, these tanks are generally only rated for a maximum operating pressure of 300 psi. As I stated in the video, I sprang for the expensive two stage compressor because I anticipate upgrading my tanks for a CNG kit on a vehicle in the future. Thank you for the question.

I like to see a update of this video with high perfume tanks.

How big is your digester?

@@BiogasUSA 5000 liters. With complete mix. I run a generator and gas boiler👍

@@Danishfarmer1 did you modify the gas boiler?

@@adw00000 No, we run with 42 psi. And we also use gas to make complete mix

Can I use any compressor other than that