Wastewater Grade III Practice Test Guide With Complete & Verified Solution

Wastewater Grade III Practice Test Guide With Complete & Verified Solution A properly functioning anaerobic digester will achieve a reduction in volatile solids of greater than 50%. ( )True ( )False - Correct Answer True Explanation: A properly functioning anaerobic digester will achieve a reduction in volatile solids of greater than 50%. The careful use of chlorine can correct certain operational problems of a trickling filter. ( )True ( )False - Correct Answer True Explanation: The careful use of chlorine can correct certain operational problems of a trickling filter. These include Ponding, Odors, and Filter Flies Of the following list, which chemical is used to correct an anaerobic digester upset? HTH Quicklime Aluminum sulfate Ferric chloride - Correct Answer Quicklime Explanation: Quicklime is a base which will neutralize the acid in an upset digester. HTH is a form of chlorine that will kill desirable bacteria. The other chemical listed are acidic and will not work to neutralize an upset digester. Buffer in an anaerobic digester: Is added weekly by adding quicklime to the digester Is the result of calcium carbonate present in the water portion of the sludge that is pumped to the anaerobic digester