(a) Explain with sketches the treatment of sewage by activated sludge…
Previous year question for Waste Water Engineering.
Question
(a) Explain with sketches the treatment of sewage by activated sludge process. Mention the advantage and disadvantages of this system.
(b) A single stage trickling filter is designed for an organic loading of $10000\text{ kg}$ of BOD in raw sewage per hectare metre per day with a recirculation ratio of 1.2. This filter treats a flow of $4\text{ mld}$ of raw sewage with a BOD of $220\text{ mg/l}$. Using NRC formula, determine the strength of the effluent.
- Year: 2022
- Subject: Waste Water Engineering