alleryWhy is a small part of activated sludge returned to the aeration tank?
ATo stop aerobic growth
BTo remove all dissolved oxygen
CTo provide a microbial inoculum
DTo distil the effluent
Answer & Solution
Correct answer: C. To provide a microbial inoculum
Recycled activated sludge supplies useful microbes as an inoculum for continued aerobic treatment. The larger remaining portion goes to anaerobic sludge digesters.
Keep practising Neet B08
Browse all Neet B08 questions for NEET UG, or explore more Biology topics.
Related questions
Chikungunya is a viral disease often associated with:Which statement about dengue is correct?Under identical BOD test conditions, samples P, Q and R give 8, 20 and 400 mg/L. Which hasWhy favour a suitable baculovirus when beneficial insects must be conserved?Why must a caterpillar eat leaves sprayed with Bacillus thuringiensis spores for this contWhy is cyclosporin A useful after an organ transplant?Which microbial product is used as a clot buster after myocardial infarction?Which enzyme pair is used to clarify bottled fruit juice?