Does anyone have a DIY biogas system in full use?

[Ivan]

I did a fair bit of work on it several years ago. Look up 'fumigation' on google. It's mainly done with LPG. You'll find that it will cause the engine to knock at high load, but works well for mid load. For vehicles, we turn off the gas completely to avoid knocking on over-run (no diesel to provide ignition, so presumably ignites when exhaust valve opens).

[Philip R]

Ivan,
Regarding #20. I recall a CIWEM lecture I attended, the subject was about the changes required for the Killington Lake M6 services when the Lodge was added. The reason being the increase due to the lodge of the Carbon (C) / Nitrogen (N) Ratio. As the lecturer noted, the Poo to Pee ratio!

Some years ago, I visited the Hall and Woodhouse brewery in Blandford St Mary in Dorset. Before partaking in drinking and eating, we were shown the then new canning plant, powerred from the digestion of excess yeast, not required by Marmite, using an anaerobic digester.

PhilipR

[julian]

I did a fair bit of work on it several years ago. Look up 'fumigation' on google. It's mainly done with LPG. You'll find that it will cause the engine to knock at high load, but works well for mid load. For vehicles, we turn off the gas completely to avoid knocking on over-run (no diesel to provide ignition, so presumably ignites when exhaust valve opens).

Ive done some looking on google, but am unsure where you are pointing me to : (

Can you give me a direct link?

[knighty]

these 2 PDFs are quite intresting

http://e-futures.group.shef.ac.uk/publications/pdf/61_AD%20for%20Sri%20Lanka%20Emily%20Hounslow.pdf

https://www.engineeringforchange.org/static/content/Agriculture/S00068/ARTI%20Biodigester%20Construction%20Manual.pdf


especially combined with a quick search on youtube for "arti biodigester"



a 12ton bio digester being built in africa...
http://www.youtube.com/watch?v=s4EWOoPY5OY&feature=related



I've done a quick google but can't find out - can a bio digester run on just manure ?

[clivejo]

Is it possible to use an old insulated copper cylinder as a digester? 

[desperate]

I think the active bugs find copper ions disagreeable. Copper salts are used as antibacterial and antifungal treatments, so it may be a bit iffy using a HWC.

Desp

[clivejo]

Drats... just have to keep looking..  what about big blue plastic drum?

[desperate]

Blue poly should be ok, I think. I wonder if you could put a bit of paint in a HWC and sploosh it around a bit? Would it make a good enough protective coat, I have a couple of old cylinders waiting to be weighed in............

Desp

[batman88]

Just type in "LPG fumigation" into google. You'll have to read the articles yourself to work out which are good and which are not. The reason I suggest looking up LPG fumigation is that a lot more people have done this, but the principle is the same for methane fumigation.

Here's a link for the search: http://www.google.co.uk/#sclient=psy-ab&hl=en&source=hp&q=lpg+fumigation&pbx=1&oq=lpg+fumigation&aq=f&aqi=g2g-v2&aql=&gs_sm=e&gs_upl=1475l6967l0l7387l23l13l4l6l6l1l563l2775l0.7.5.5-1l21l0&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=1f2282e8f46da277&biw=1280&bih=587