Biodigester Sewage Treatment

Sewage Treatment Plants

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How they work? Performance Treatment options


The BIODIGESTER sewage treatment plant is designed to produce an effluent quality of :-


Average test results in the USA were 5mg/l BOD and 8mg/l Suspended Solids. The tank has also been tested to the requirements of EN 12566-3 and carries a CE mark. See our Certifications page.


More stringent effluent qualities may also be catered for.

The effluent can be discharged to a watercourse or via a soakaway, subject to approval.


BIODIGESTER effluent quality is similar to that required for a major treatment works.


*BOD = Biochemical Oxygen Demand measured over 5 days

BOD* 5

Suspended Solids

Ammoniacal Nitrogen (as N)




By Comparison a

septic tank produces

a BOD* of 400mg/l