Check your secondary ...

Published March 6, 2017 14:54 by K.R. Ambekar, Freelance Consultant (Proprietor, KR Consultants)

Check your secondary clarifier outlet clarity. If it is turbid, then you may be loosing bacteria & that is forming slime on the sand surface.

1 Comment

Thanks for your Comments Sir

Published March 11, 2017 19:15 by Lokesh Kumar, Chartered Chemist, Assistant Chemist at Delhi Jal Board, Government of NCT Delhi (Formerly: Municipal Water Supply & Sewage Disposal Undertaking)