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Showing posts from September, 2012

Getting stuck in ...

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A few weeks ago, our garden shed was moved from the site of our rental property up to our lot. It was rather muddy and the truck got stuck rather severely. Here are some pictures ...













Biogas :: The making of ...

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A few weeks ago I went to a Biogas workshop which was held in an area not far from us. Here we learnt how to make a bio digester using commonly available materials.

For those of you who may not be aware, a Biogas digester is a device that is used to generate biogas (a mixture of methane, CO2 and hydrogen sulphide) from organic waste material. Biogas can be used for cooking, heating, lighting or even running a heat engine to generate mechanical or electrical power. About 2kgs of organic waste material is required to create about 1m3 of biogas. This could run one average size cooking burner for about 3 hours. It depends on various factors - some waste streams can generate far more gas than others, and some anaerobic bacteria better at producing methane than others. For the sake of this article, the above approximations hold roughly accurate.

The digestor has two main components, the digesting compartment (bottom tank) and the gas collector (top tank). In some cases these two tanks are …