hat is Biogas...?

For those who are not familiar with the term Biogas :

Microorganisms who thrive in the absence of air digests the organic material and releases a mixture of gases. The gases thus produced contains mostly methane along with other gases like Carbon dioxide, Nitrogen and Hydrogen Sulphide in small quantities. This process is known as anaerobic digestion.

Methane is a colorless and odorless gas and is highly flammable. (It is Hydrogen Sulphide that smells bad) Methane is not poisonous.

Methane along with other gases occurs naturally in swamps, waste dumps and even in home toilets in the septic tank. Due to its highly flammable quality, it can be used as fuel. But capturing the methane from the atmosphere is very difficult as it is lighter than air. The Biogas Digester or Biogas Plant we see here is a device which helps us in collecting this gas and use it as fuel.

Biogas Plant


The Biogas plant consists of a digester tank, where the organic material is stored and the microorganisms work on them and release gas.
The gas thus produced is collected in a tank known as gas collector. In a floating type model, this tank is floating in the slurry and moves up-and-down based on the amount of gas stored in it
A guide pipe helps the gas collector tank to move up-and-down inside the digester tank.
Waste is fed through feed pipe inside the digester tank.
The fully digested slurry drains out through the outlet pipe. This can be collected, diluted and used as fertilizer for plants.
A gas pipe line from the Gas collector tank helps in utilizing the gas for cooking and lighting

Now let's get down to business and construct a medium sized Biogas plant for home use

for my tank i used a 300litre tank for my gas coolector.
i had it cut from the shop where i bought it

Pics;->

And a 500 liter tank for the digester tank
also had it cut
but the size of the cut must match the size f the 300 litre tank so i can drop the smaller tank into the bigger tank freely

following....

other items needed are:
ball valve for gas outlet
one length of 1 inch pipe for my support
elbow joints to fit on the 1 inch pipe
4 inch pipe for intake of organic waste

one and half in socket
2 inch pipe and socket
araldite gum
hack saw and access bend

i start by cutting a 4 inch hole on the 500 litre tank to fit my access bend
attach the access bend and glue the edges with the gum to avoide leakage as shown in the picture

next i cut a 2 inch hole for the 2 inch pipe and apply the gum as well as shown in the diagram

Then i cut out the side of the drum as shown in the picture and used epoxy resin gum to hold the 1 inch pipe to the body of the drum.
i got disappointed when the pipe kept falling off so i used riveting pins instead

Watching...

Waiting ....

I used inflammable PVC gum to burn a hole on the bottom of the 300litre tank.You can use knife or any suitable object to cut the hole but be careful not to make it too big in order to avoid gas leakage
then i sealed it with the epoxy resin to avoid leakage

Keep it coming bro

will post more of the pics and instructions this morning didnt sleep well last night did a lot of reading for post utme things.

Due to the distance involved and people complaining we have decided to put the whole biogas process into a very comprehensive production package that goes for #6000 naira, it contains step by step well explained guide on how to produce your own biogas plant, how to purify it, generate electricity from it, how to package it and sell and turn in huge amount of profit in no time. If your interested please let know early.

Hello waste to energy engineer, am promise by name and i have a possible contract work to assign to you on this splendid project.
please drop your number as soon as possible.

hello, please, how much will building a biogas plant cost?