WebSep 1, 2024 · Class 7 Science Wastewater Story Additional Important Questions and Answers. Question 1. Define Wastewater. Answer: The water which is rich in a lather, mixed with oil, black-brown water that goes down the drains from sinks, showers, toilets, laundries is dirty and it is known as Wastewater. Question 2. WebJan 21, 2024 · Air is pumped into the clarified water, obtained in the first stage, so that aerobic bacteria can grow. This bacteria eats up human excreta, food waste and other unwanted matter. After a number of hours, the bacteria settles at the bottom of the tank as activated sludge. Water from the top is removed. The activated sludge contains 97% water.
Wastewater Story Class 7 Extra Questions and Answers Science Chapter …
WebApr 6, 2024 · Waste-Water Treatment Plant is written in short form as WWTP. The wastewater treatment plant is also called sewage treatment plant. The various … WebMar 15, 2024 · ICSE Subjective Questions for Class 7; ICSE Subjective Questions for Class 8; ICSE Subjective Questions for Class 9; ICSE Subjective Questions for Class 10; ICSE Practice Test. ... Define sewage . Asked by Piyushverma9431 15 Mar, … teresa ko husband
Wastewater Story Class 7 Extra Questions Science Chapter 18
WebAug 1, 2024 · at each stage: Fill a large glass jar 3/4 full of water. Add some dirty organic matter such as grass pieces or. orange peels, a small amount of detergent, and a few drops of an ink or any colour. Cap the jar, shake it well and let the mixture stand in the sun for two days. After two days, shake the mixture and pour a small sample into test tube. WebOct 14, 2010 · For most people a complete understanding of the standard methods required to accurately complete critical wastewater analytical tests is not necessary. However, a fundamental understanding of the theory behind and working knowledge of the basic procedures used for each test, and the answers to commonly asked questions about … WebMar 9, 2012 · Definition: A mechanical wastewater treatment unit that provides secondary wastewater treatment for a single home, a cluster of homes, or a commercial establishment by mixing air (oxygen) and aerobic and facultative microbes with the wastewater. ATUs typically use a suspended growth process (such as activated sludge-extended aeration … teresa kok ceramah