Environmental Engineering Reference
In-Depth Information
12.34 The plant influent includes an industrial flow that contains 220
mg/L BOD. The industrial flow is 0.70 MGD. What is the popula-
tion equivalent for the industrial contribution in people per day?
12.35 The label of hypochlorite solution states that the specific grav-
ity of the solution is 1.1588. What is the weight of 1 gallon of the
hypochlorite solution?
Use the following information for Questions 12.36 through 12.39:
Plant influent
Flow = 8.40 MGD
Suspended solids = 360 mg/L
BOD = 240 mg/L
Primary effluent
Flow = 8.40 MGD
Suspended solids = 130 mg/L
BOD = 160 mg/L
activated sludge effluent
Flow = 8.34 mg/L
Suspended solids = 17 mg/L
BOD = 20 mg/L
anaerobic digester
Solids in = 6.6%
Solids out = 13.5%
Volatile matter in = 65.5%
Volatile matter out = 47.9%
12.36 What is the plant percent removal for BOD
5
?
12.37 What is the plant percent removal for TSS?
12.38 What is the primary treatment percent removal of BOD
5
?
12.39 What is the percent volatile matter reduction in the digestion
percent?
Use the following information for Questions 12.40 through 12.42:
Plant influent
Flow = 8.40 MGD
Suspended solids = 360 mg/L
BOD = 240 mg/L
Primary effluent
Flow = 8.40 MGD
Suspended solids = 130 mg/L
BOD = 160 mg/L
