Wastewater III Study Exam Actual Questions and Answers Solved 100% Latest 2024 Guide

Wastewater III Study Exam Actual Questions and Answers Solved 100% Latest 2024 Guide First action for a polymer spill Apply an absorbent to the spill such as sand or kitty litter and then sweep up the materials. Total discharge head includes Discharge pressure head + static discharge head + Velocity head (outlet) + Friction Head (discharge line) Where is the best location to collect a sample? A location that represents the entire waste stream or basin. What are the preservation and hold times for BOD samples? 48 hours at < or = to 6 degrees C. Define BOD. The rate at which organisms use the oxygen in water or waste water while stabilizing decomposeable organic matter under aerobic conditions. What is the purpose of a dessicator? To allow residual samples to control moisture prior to weighing. What will happen if the flow to the grit chamber is too low? Too much organic material will be deposited. How does an operator control the suspended solids in an activated sludge basin? By wasting and returning activated sludge. Chlorine combines with ammonia to form what Chloramines What can the operator control with the activated sludge process? Wasting and return rates. What is the best way to control filamentous bacteria? Addition of chlorine to the (RAS.) Called return on some tests. A 5.2 acre lagoon with an in-fluent of 47000 gallons per day is dropped 3 inches a day from a depth of 5 feet to a depth of 2 feet. How many gallons are discharged each day? 470,577 gallons per day (exact problem) Define endogenous respiration. A situation where living organisms oxidize some of their own cellular mass instead of new organic matter they absorb or absorb from their environment. What should the velocity of the sewage in a gravity sewer line be coming into the waste water plant? At least 2.0 Feet per second. What does hydrogen sulfide do in a collection system? It causes corrosion. What must be on the warning tag attached to a switch that has been locked out? The signature of the person who locked out the switch and who is the only person authorized to remove the tag. Primary clarification generally removes what percentage of TSS? (Total Suspended Solids) 40 to 60%