Sewage treatment lab (Bio) Questions with Correct Answers

Combined treatment system Correct Answer carry away both water polluted by human use and water polluted as it drains off homes, streets, or land during a storm Separate treatment systems Correct Answer take runoff waste and vent it directly into a body of water, while domestic and industrial waste is piped to the wastewater treatment plant D.O. Correct Answer dissolved oxygen. The life and death of any body of water depends to a great extent upon its ability to maintain a certain amount of dissolved oxygen (low D.O. = bad) B.O.D. Correct Answer biochemical oxygen demand. Measures the dissolved oxygen. Measures if the sewage treatment plan is working (high b.o.d. = bad) Primary treatment Correct Answer physical process. Solids are allowed to settle and are removed from the water