Trickling filter is used in:
Ans. is 'b' ie secondary t/t of sewage Modern Sewage treatmentThe treatment of sewage may be divided into 2 stages primary t/t & - secondary t/t Primary t/t - in primary t/t the solids are separated from the sewage partly by screening and partly by sedimentation and subjected to anaerobic digestion Secondary t/t - the effluent is subjected to aerobic oxidation.* Secondary treatment is done by one of the following methodsTrickling filter methodActivated sludge process.
Environment and Health
Primary treatment of sewage
Secondary treatment of sewage
Oxygen ponds
Sewage farming
Secondary treatment of sewage