How biodigesters works

How Biodigesters Works

The biodigester is fed from the final manhole of the sewer system. The solid human waste is broken down to liquid affluent by the methanogenic bacteria culture supplied with the biodigester and the same time it produces biogas. The liquid affluent can be recycled to flush toilets, for irrigation or channeled to a sock pit. There is an option of using the biogas for cooking or lighting by incorporating a gas storage tank which is a digester by itself in floating drum concept and can be fed by waste water from the kitchen, food waste or animal dung. The gas produced will supplement the gas from the biodigester.


The biodigesters and piping system are made of heavy duty plastic. The dome cover is coated with vynl, all bolts and nuts are made of galvanized steel and coated with silicone for total prevention against corrosion. The biodigester is enclosed in a stone and motar compartment and the top is reinforced with steel and concrete to guard against mechanical damage. The digesters are delivered on site as complete units together with pipes and inspection manholes.

Can Anaerobic Bacteria digest fats?

The anaerobic bacteria is capable of digesting all edible fats that's why we recommend channeling all kitchen waste water to the biodigester. For more detailed information click the link below

University of NairobiICT