Wastewater practice Exam Revision Exam With All Correct Answers 2024.

What's the methane content in a properly operating a anerboic digestor? - Answer 65-70% by volume What will the addition of chlorine gas do to the pH of wastewatee - Answer Decrease pH What's the purpose of a parshall flume? - Answer Measure flowrate What's the typical removal efficiency of set table solids in a primary clarifier ? - Answer 95-99% Which of the following is true about pumping scum from a primary clarifier ? - Answer Scum causes piping issues What causes thick billows of white sudsy foam in the aeration tank ? - Answer MLSS is too low What does the M in F/M ratio represents? - Answer Mixed liquour violtile suspended solids in aeration tank How will warmer temp affect the settling rate of solids in a clarifier? - Answer Increase settling rate What could happen if the digestor gas is mixed with air (85-95% by volume) - Answer Cause an explosion How will algae impact the chlorine demand in the pond effluents? - Answer Doesnt affect chlorine demand What's true about a positive displacement pump? - Answer Must never b started with ghe discharge valve closed