Sewage Treatment Plant Questions with Correct Answers

Persigo Wastewater Treatment Plant Correct Answer Put into service in 1984, uses conventional activated sludge system (with aerobic and anaerobic sludge digesters) Domestic input and industrial wastewater (%) Correct Answer 80% input is domestic and 20% is industrial wastewater How much water does the plant treat every day? Correct Answer 8 million gallons of water (max of 12 gallons) How many hours does it take to run through the system? Correct Answer 14 hours Biological Oxygen Demand Correct Answer the amount of oxygen that would be consumed if all the organics in one liter of water were oxidized by bacteria/protozoa. In the plant they provide more than the necessary oxygen to the microorganisms in the aeration basin to ensure optimum digestion of the organic material Activated Sludge System Correct Answer a method of wastewater treatment where microorganisms are used to digest the organic materials. These microorganisms are constantly recycled in the sewage treatment system to keep the system going #1 Operations Building Correct Answer -Test incoming water -Atomic absorption spectrometer tests for heavy metals #2 Input line/pit and flow meter Correct Answer -All the waste water enters here -If there is too much to handle at one time (large rain) or incoming water is too toxic, then the excess water is diverted to the Flow Equalization Basins