FE Exam - Environmental with correct answers 2023

WASTEWATER TREATMENT BIOLOGY correct answers Aerobic Decomposition correct answersdecomposition of organic material in the presence of oxygen Aerobic Decomposition a. end products b. appropriate BOD levels c. how much sludge produced correct answersa. water, CO2, new cell material b. 500 mg/l (dilute ww) c. produces a lot of sludge Anaerobic Decomposition correct answersdecomposition in the absence of oxygen and nitrate - primary electron acceptors are sulfate (SO42-), CO2, and organic compounds that can be reduced Anaerobic Decomposition a. end products b. appropriate BOD levels c. how much sludge produced correct answersa. CO2, methane, water, ammonia, hydrogen sulfide b. 1000 mg/l c. very little sludge, anaerobic can be used to stabilize sludge produced in aerobic and anoxic treatment d. is a smelly process and requires temperatures to be elevated initially Anoxic decomposition correct answersNO3- if final e- acceptor Sequence of oxidation by bacteria in the presence of no oxygen