Quiz 1.1

To reduce the desludging frequency and enhance the performance of the septic tank connected to a block of 5 toilets, a solution was suggested to intercept the toilet and septic tank with a biogas digester.

The required assumptions are summarised in the following table.

Average number of toilet users20person
Number of toilets per block5toilets
Biogas potential20 – 30Litre Biogas /person/day