Texas Wastewater B Exam Questions And Answers

Texas Wastewater B Exam Questions And Answers Primary Clarifiers - ANS In an activated sludge treatment system, primary treatment processes include the: Removal of Inorganic material from grit - ANS In a washing grit remover, the grit is moved slowly by screw conveyors up an inclined channel in order to? 90% or above - ANS An efficient primary clarifier is expected to remove ? of the influent settleable solids. Adequate DO at surface at all times - ANS Proper operation of a facultative pond system requires that:, True - ANS The amount of organic matter removed by a trickling filter is mostly dependent on the recirculation ratio Bulking - ANS In an activated sludge treatment plant, a Sludge Volume Index (SVI) of 180 would indicate Reseed The AB, Remove sludge from FC - ANS The purpose of returning the solids from the bottom of the clarifier to the aeration tank in the activated sludge process is to Free swimmer rotifers stalked ciliates - ANS Microscopic examination of a good-settling sludge should show a predominance of: Dissolved oxygen (DO) or oxygen obtained from food materials such as sulfate or nitrate - ANS When nitrification takes place in the activated sludge process, facultative bacteria use Primary clarifiers - ANS In an activated sludge process, the results of a mixed liquor settling test indicate that the supernatant of the mixed liquor sample is clear, but the supernatant of the plant effluent sample is turbid. These test results indicate that the problem is occurring in the? Low C02 high Methane - ANS One indication that an anaerobic digestion facility is improving would be? False - ANS The terms "low rate" and "high rate" when used in reference to the anaerobic digester refer to the rate of stabilization of the raw sludge? Control odor, Reduce BOD ,Control foaming, Aid in sludge - ANS Besides disi