Saturday, August 8, 2009

Biogas Digester by Cecilia and Nelson




As its name indicates, the biogas digester exclusively uses biodegradable materials as fuel. It is a 3-part system that functions automatically and therefore requires almost no manpower.

How it works.

The first part of the digester is the inlet. All of the biodegradable materials enter the digester through the inlet. These materials include human and animal waste, as well as leftover food. They decompose more quickly in the digester, the second part of the system, because it is hermetically sealed to facilitate the process. The decomposition of these elements in the digester produces a gas, called “biogas.” The biogas creates a pressure which pushes the excess waste through the last part of the system, the outlet. In the meantime, the biogas is directed to the points of us. It can be used as fuel for a variety of applications and, contrary to popular concern, is completely odorless.

The biogas digester at ACRESt was constructed 3 years ago. It is composed of cement. At first, it was used to run a motor. Now, the biogas is used as fuel for cooking.

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