SURVEY OF USE OF BIODIGESTERS IN KENYA

Abstract
On-site sanitation, also called decentralized sanitation, is a system where the treatment of excreta or sewage takes place at the same location where it is generated. The bio-digester is a far more environmentally friendly way of storing and treating effluent waste compared to the septic tank. It works on a similar basis of a septic tank, however it does not need to emptied regularly because the waste that comes out of the ‘Bio-digester’ has been treated so much so that it can be released into the local environment. The system works by storing the untreated waste- allowing the solid waste to fall to the bottom of the tank. Air is then used to agitate the sludge so that aerobic digestion can occur.
The bio-digester occupies a small construction area. i.e. 1 square meter for domestic purposes and only 2 square meters for commercial purposes hence leaving greater space for other construction purposes.
The study is carried out through discussions and obtaining relevant information. The discussions were conducted with the personnel involved in bio-digester construction. Information obtained included the types and sizes of the bio-digesters and their cost. Site visit was conducted to ascertain the works done.
On the basis of the findings in this study, the recommendations were made in order to promote the use of bio-digesters.

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