WASTEWATERA rotating biological contactor (RBC) wastewater treatment plant experiences a utility power failure and standby power is unavailable. Local emergency management officials determine the power will be restored in 36 to 48 hours. What should the operator do to protect the growth on the media and the RBC units themselves?A. Immediately wash the attached growth off the RBC discs with a power washer.B. Manually rotate the RBC drum a quarter-turn every four hours to prevent the slime growth from only growing on the bottom portions.C. Manually rotate the RBC drum completely until power is restored to maintain permit compliance.D. Drain
