Anaerobic digester - Study guides, Class notes & Summaries

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 (Ans- 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 (Ans- D) Decrease the pH (v.1 pg 349-350) What is the purpose of a Parshall flume? A) measure turb...

WASTEWATER OPERATOR GUIDE TO PREPARING FOR THE CERTIFICATION EXAMINATIONS (CLASS B-A OR III-IV) Anaerobic digestion gas handling systems are kept under positive pressure for what reason? - correct answer To prevent air from entering the system and mixing with digester gas, which could cause an explosion What are the components of an effective safety program? - correct answer Regular safety briefings, daily practice, a strong advocate for safety, and a strong central leader. Which of the...

What is the methane content in a properly operating 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 - correct answer c What will the addition of chlorine gas do to the pH of wastewater? a. Moderately increase the pH b. pH will not be affected c. Significantly increase the pH d. Decrease the pH - correct answer d What is the purpose of a Parshall flume? a. Measure turbidity b. Measure flowrate c. Measure settlin...

Waste Water Operator class C exam 2024/2025 Review Questions and Answers correct verified When Chlorine is combined with water what type of pipe should be used? A. Ductile iron B. Asbestos concrete C. PVC D. Carbon Steel - CORRECT ANSWER-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 - CORRECT ANSWER-D. Free swimmers and stalk ciliates...

Ca Grade 2 Wastewater Treatment Operator Practice Exam with Complete Solutions What is the methane content in a properly operating anaerobic digester? 65 to 70% by volume What will the addition of chlorine gas do to the pH of wastewater? decrease the pH What is the purpose of a Parshall Flume? Measure the flow rate What is the typical removal efficency of settleable solids in a primary clarifier? 95 to 99% Which of the follwing is true about pumoing scum from a primary clarifier? scum...

What is the methane content in a properly operating 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 What will the addition of chlorine gas do to the pH of wastewater? a. Moderately increase the pH b. pH will not be affected c. Significantly increase the pH d. Decrease the pH - Answer d What is the purpose of a Parshall flume? a. Measure turbidity b. Measure flowrate c. Measure settling rate d. M...

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 volume of wastewater flowing through the pipe is 3.14x1.25 x 1.25 x 2...

Texas Wastewater Class A Exam Prep Seeding of BOD samples is necessary when samples - (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? - Summer A 30-inch diameter wastewater interceptor is observed to be flowing half-full at about two fps. The approximate volume of wastewater flowing through the pipe ...

Fluffy white foam indicates low aerator solids concentration, while leathery brown foam indicates high solids concentration. - T When an anaerobic digester is becoming upset, the first sign will be increased alkalinity and decreased volatile acid concentration - F Surface aerator oxygen transfer efficiency increases as submergence decreases and the oxygen transfer efficiency increases - F When chlorine is used before disinfection for odor control it is not necessary to satisfy a chlorine ...

Seeding of BOD samples is necessary when samples correct answers (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? correct answers Summer A 30-inch diameter wastewater interceptor is observed to be flowing half-full at about two fps. The approximate volume of wastewater flowing through the pipe is 3.14x1.25 ...