Texas Wastewater B Exam 2024/2025, Exams of Water and Wastewater Engineering

Download Texas Wastewater B Exam 2024/2025 and more Exams Water and Wastewater Engineering in PDF only on Docsity! TEXAS WASTEWATER B EXAM 2024/2025 WITH THE LATEST AND UPDATED SCORE(100% PASS). Primary Clarifiers -- Answer ✔✔ In an activated sludge treatment system, primary treatment processes include the: Removal of Inorganic material from grit -- Answer ✔✔ In a washing grit remover, the grit is moved slowly by screw conveyors up an inclined channel in order to? 90% or above -- Answer ✔✔ An efficient primary clarifier is expected to remove ? of the influent settleable solids. Adequate DO at surface at all times -- Answer ✔✔ Proper operation of a facultative pond system requires that:, True -- Answer ✔✔ The amount of organic matter removed by a trickling filter is mostly dependent on the recirculation ratio Bulking -- Answer ✔✔ In an activated sludge treatment plant, a Sludge Volume Index (SVI) of 180 would indicate Reseed The AB, Remove sludge from FC -- Answer ✔✔ 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 -- Answer ✔✔ 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 -- Answer ✔✔ When nitrification takes place in the activated sludge process, facultative bacteria use Primary clarifiers -- Answer ✔✔ 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 -- Answer ✔✔ One indication that an anaerobic digestion facility is improving would be? False -- Answer ✔✔ 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 -- Answer ✔✔ Besides disinfection, chlorination can be used in wastewater treatment processes to? 450ml -- Answer ✔✔ If released to atmospheric pressure, one part liquid chlorine will expand to about? 8-12" -- Answer ✔✔ Anaerobically digested sludge should be applied to a drying bed to a depth of about? Not to create a negative pressure in the anaerobic digester and to prevent coning of sludge -- Answer ✔✔ Sludge from a digester should be slowly drawn to a drying bed in order to? Recharge Water supply, keep saline out of groundwater stop ground Substance -- Answer ✔✔ Direct aquifer recharge of treated effluent can be used to?