Biodigester Septic Tanks

The biodigester Septic Tank (BST) is an on-site sanitation unit that utilizes anaerobic technology for the disposal of toilet (black) wastewater as well as of kitchen and bathroom (grey) water, in a closed system. The treated water can then be used for other functions like watering gardens, irrigation flushing toilets and so on.

Advantages of biodigesters septic tanks

They are simple to construct and inexpensive.

Reduces fuel cost, as it is more cost effective to use biogas than Liquid Petroleum Gas (LPG) as fuel.

Why we require biodigester septic tanks?

• The discharge of untreated wastewater on economically important natural resources such as rivers and seas, and their ecosystems leads to their destruction.
• The inadequate handling and disposal of sewage lead to health problems.
• Household sewage generated is causing serious pollution of surface and ground waters.
• The present ‘on-site’ systems of sewage disposal do not provide much in the way of treatment.
• The extremely high cost of high tech systems (activated sludge, oxidation ditches etc.).
• The use of the generated biogas which can be used in place of LPG and firewood.
• The need for alternative energy sources.

When doing an environmental impact assessment on buildings, the NEMA expert recommends a biodigester septic tank especially on commercial and residential buildings so as to conserve the environment from pollutants.

Mercy Wangui (NEMA EXPERT)

0715827209