(Solved): A biological setup to treat hazardous liquid waste as shown in Figure below, employs a 4900 gal bi ...

A biological setup to treat hazardous liquid waste as shown in Figure below, employs a 4900 gal bioreactor that operates at a MLVSS of \( 2100 \mathrm{mg} / \mathrm{L} \) and treats \( 11000 \mathrm{gpd} \) of wastewater with \( 1100 \mathrm{mg} / \mathrm{L} \) of TOC. The recycle flow is \( 6000 \mathrm{gpd} \), waste rate is 400 gallons, and MLVSS in effluent is \( 35 \mathrm{mg} / \mathrm{L} \). Determine the sludge age (or solids retention time or SRT) for this setup.