Dear all
This is a question that has been popping up in my work again and again:

Does a biogas reactor have an effluent or not?


The Factsheet on this Technology Compendium of Eawag says no, because, depending on the design, the effluent quantity can be very low.
However, when you look at the picture provided with it: you clearly see an outlet...
When generating different sanitation system options from the technologies, this question becomes very relevant because if I need to consider this effluent, the number of possible options of system configuration is significantly increased (i.e. multiplied by the number of options available to treat this effluent).

Please share your opinions / gut feelings / best guesses!

Cheers, Dorothee