A hold tank is installed in an aqueous effluent-treatment process to smooth out fluctuations in concentration in the eff
Posted: Mon May 16, 2022 1:38 pm
A hold tank is installed in an aqueous effluent-treatment process to smooth out fluctuations in concentration in the effluent stream. The effluent feed to the tank normally contains no more than 100 ppm of acetone. The maximum allowable concentration of acetone in the effluent discharge is set at 150 ppm. The surge tank working capacity is 500 m3 and it can be considered to be perfectly mixed. The effluent flow is 750 L/min. If the acetone concentration in the feed suddenly rises to 1000 ppm, due to a spill in the process plant, and stays at that level for half an hour, will the limit of 150 ppm in the effluent discharge be exceeded?