Biogas DIY Training 2

I would like to suggest to all beginners to start small at 40-50 liters first for self education purpose in getting the first flame before going bigger.

In my case just use a standard normal dustbin.

Could you name the basic inner and outlet and their purpose in these photos?

On the lid has two opening. One bigger than another. The one bigger in the middle is inlet for the feeding purposes. Smaller  opening observed is an outlet for biogas in which you have to further install valve and gas hose connected to inner tube or a gas bag for storage.

This is how its look like under the lid. Inlet for feeding has to extended towards below to ensure biogas does not escape through the lid. Also to make sure all feed goes down to the bottom. Observe the outlet for gas which only briefly short and does not extend deep to below. This is to make sure the release gas will go through that and collected in a proper storage. Also by this way the outlet won't easily get blocked by floating organic matter thus also halt gas move from the digester to storage via the gas outlet.

There is another outlet in this part. The purpose is for releasing slurry when the feeding is performed. Digester function like stomach. Every volume you load will take space so some of the content in digester has to be get out from it. Roughly the same amount fed, the same amount deducted from digester. This is where the slurry outlet become very useful.

Once you have a complete parts, both lid and below dustbin could be sealed by using any sealant such as silicon, rubber silicon or any glue that you would think can do the job successfully. This to make sure the inside part will achieve anaerobic condition once everything filled up in the digester.

So, finally it will look like this setup. It is just you need to connect it to inner tube to store the gas. To give a better understanding please look at my dustbin digester drawing below.

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Another example of using 50 liter container.

A bigger example below when using a 200 liter hdpe drum. Though all these container turn to digester are really different, please notice that they have similar one inlet and two outlets for a digester to function properly. Of course this is the minimum requiremet and you cal also add so many features later.

 

By now you should have already understand the critical system design.

Next, want to know more on how to inoculate the digester? 

Check it out on below links to understand the system as a whole. Learn the small unit first!

How about now? Lets inoculate digester with microbes !!!

===> GO TO TRAINING BIOGAS 3

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