High sludge age mlss - Study guides, Class notes & Summaries

Young Sludge Floc Size straggler Floc, large, fluffy, irregular shape Old Sludge Floc Size pin Floc, round, small, granular Young Sludge Foam Characteristics white, billowy, crisp Old Sludge Foam Characteristics shiny, dark tan, greasy, dark leathery Young Sludge Indicator Organisms Amoebae, Flagellates Old Sludge Indicator Organisms Rotifers, worms, nematodes Young Sludge MLSS low, under-oxidized Old Sludge MLSS high, over-oxidizes ...

Important factors that determine the type of treatment scheme that will be used include ________. Select one: area available ent quality required ting costs of the above d. all of the above Causes of sludge bulking include ________. Select one: DO and presence of sulfides supply too low ic loading rate too high ent imbalance the above the above A rotating biological contactor is ________. Select one: ced treatment rarely found in Texas b.a centrifuge for micr...

Texas Wastewater A Exam Quuestions and Complete Solutions What is TCEQ doing to control "point source" pollution of the Texas waterways? - Answer: *Permitting of domestic wastewater plants *Permitting of industrial wastewater plants Describe proper design of force main wastewater lines. - Answer: Minimum two fps velocity with the smallest pump operating alone. Minimum four inch diameter pipe with 150 psi rating. What is Standard Dimension Ratio? - Answer: Ratio of outside pipe diamet...

Wastewater Exam Class C Questions and Answers Already Passed The Activated Sludge Process: A. requires preaeration B. requires Activated Carbon C. is an aerobic biological process. D. Usually precedes primary sedimentation. E. Requires 50% by volume old sludge to work effectively. C. Is an Aerobic biological process A complete mix activated sludge plant has a fast settling sludge and high amounts of pin floc leaving the clarifier. One way to correct this problem is to : A. Increase the RA...

WasteWater Operator class C exam practice review questions and answers with certified solutions When Chlorine is combined with water what type of pipe should be used? A. Ductile iron B. Asbestos concrete C. PVC D. Carbon Steel C. PVC A good settling sludge would consist of what type of protozoa? A. Rotifers and nematodes B. Amoebas and Flagellates C. Stalked ciliates and mastagoria D. Free swimmers and stalk ciliates D. Free swimmers and stalk ciliates What is Phenolphylein used for in ...

Texas Wastewater Class A Exam Questions and Complete Solutions Seeding of BOD samples is necessary when samples - Answer: (All of the above) have a chlorine residual, have a previously been chlorinated, have been subjected to high temperatures, contain high or low pH industrial wastes When is blue-green algae the most dominant on a pond treatment system? - Answer: Summer A 30-inch diameter wastewater interceptor is observed to be flowing half-full at about two fps. The approximate volum...

WASTEWATER TREATMENT BIOLOGY - answer- Aerobic Decomposition - answer-decomposition of organic material in the presence of oxygen Aerobic Decomposition a. end products b. appropriate BOD levels c. how much sludge produced - answer-a. water, CO2, new cell material b. <500 mg/l (dilute ww) c. produces a lot of sludge Anaerobic Decomposition - answer-decomposition in the absence of oxygen and nitrate - primary electron acceptors are sulfate (SO42-), CO2, and organic compounds that...

What is the methane content in a properly operation anaerobic digester? A) 30 to 35% by volume B) 1 to 2% by volume C) 65 to 70% by volume D) 15 to 20% by volume -ANSWER C) 65 to 70% by volume (v.2 pg 158) What will the addition of chlorine gas do to the pH of wastewater? A) Moderately increase pH B) pH will not be affected C) Significantly increase the pH D) Decrease the pH -ANSWER D) Decrease the pH (v.1 pg 349-350) What is the purpose of a Parshall flume? A) measure turb...

Wastewater Exam Class C The Activated Sludge Process: A. requires preaeration B. requires Activated Carbon C. is an aerobic biological process. D. Usually precedes primary sedimentation. E. Requires 50% by volume old sludge to work effectively. Ans- C. Is an Aerobic biological process A complete mix activated sludge plant has a fast settling sludge and high amounts of pin floc leaving the clarifier. One way to correct this problem is to : A. Increase the RAS Flow B. Reduce Wasting Rat...

What is the methane content in a properly operation anaerobic digester? A) 30 to 35% by volume B) 1 to 2% by volume C) 65 to 70% by volume D) 15 to 20% by volume - ANSWER C) 65 to 70% by volume (v.2 pg 158) What will the addition of chlorine gas do to the pH of wastewater? A) Moderately increase pH B) pH will not be affected C) Significantly increase the pH D) Decrease the pH - ANSWER D) Decrease the pH (v.1 pg 349-350) What is the purpose of a Parshall flume? A) measure tu...