An activated sludge treatment system (refer to process schematic in course notes) operates with the following parameters: So = 350 mg/L Q = 30 MGD V; = 4 MGal X,

= 11,000 mg/L F/M = 0.4 day Oc = 8 days Explain the difference between F/M and O. Given design and operating parameters, calculate waste and recycle flow rates (Qw and Q.) :) For upgrade to tertiary treatment, identify pollutants that must be removed and the necessary plant modifications/additions to achieve removal of these pollutants d) Briefly discuss how the Sanitation District's largest sewage treatment plant (JWPCP) maybe part of Southern California's future potable water supply