WASTEWATER
By Rick Lallish
Typically, for an activated sludge process to maintain its operating parameters, what two variables impact the performance process and must be monitored?
A. Temperature and humidity
B. Upstream and downstream processes
C. Federal guidelines and state regulations
D. Time and operating capability
Answer: B. If the upstream and downstream processes run as desired, the activated sludge process can be controlled to meet objectives that include producing floc-forming bacteria, managing the activated sludge (foot/microorganism ratio) and maintaining healthy settleability in the secondary clarifier. Any disruption in the upstream or downstream process can affect the activated sludge process in many ways. An understanding of these processes
