The Forum

HI Folks! David House will be in Pennsylvania later this month for two workshops. These are hands on workshops including how to make and use biogas, and how to build 200 gal digester. Its a great opportunity, I think David is coming all the way from India. He wrote the book Biogas Handbook and he is...

You bet Bob. If you want to attract a few more biodiesel nuts to this forum, just say the word and I'll post a message on the "alt uses for glycerol byproduct" thread.

Cheers,
farmer

Oh yeah, we recover methanol from our glycerol but not everybody does. We are trying to work out some viable options for use of the glycerol if people don't want to do methanol recovery... right now trying to get the PA DEP to allow glycerol with methanol (technically hazardous waste) to be fed to a...

Nice biodiesel design Bob! Looks like you've seen a few of these in action. We are doing something similar in our shop, with the following modifications: 1.Solar hot water system for oil preheat (instead of engine process heat) 2.We've added a settling tank between the reactor and the wash tank. The...

Thanks Bob. Simple is attractive to me too. I just want to use the electric heat mats to start my first "pet" digester... hot water seems to make more sense for the production unit we hope to build. I've got the housing for the inner tube built, now just need to fit it with insulation and get the ba...

Hi Bob, Thanks a million for tracking that down! How do you think this would do in temperate climates? I am envisioning building an insulated house for the bag, then looping radiant heat tubing around the base of the bag to keep it around 90F... After reading your posts about two stage digesters, I ...

HI Bob,

The link you provided above is inactive. Any thoughts?

My initial guess, without knowing more, is that something like this simple inexpensive design from Francisco Aguilar

Thanks!
farmer

Hi gang, The digester designs I've seen in Home Power magazine picture a horizontal sausage-like arrangement... feedstock flows into the digester from one end, and effluent exits the tube from the other end. Is there a reason why a vertical digester like the one pictured on Bob's site would be prefe...

Hi gang. I am looking at using food waste, leaves, and crude biodiesel glycerol to feed my digester, but I think this application could also apply to human waste and other feedstocks. What sort of prep are you doing on the front end? Would passing the feedstocks through a garbage disposal be effecti...

Hi Guys, not sure what happened to Shadow, but this post has been helpful to me in getting together a little home brew project. Thanks for your efforts working with newbies!
Farmer

Hi Gang! I am very very happy to find this forum and get to discuss with you here. I have been scheming to build a digester for over a year... built and drew several prototype schemes in my spare time... this forum is just the medicine for my interest! Thanks to Bob for putting it together. Anyway l...