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the public. present in grey wastewater by means of tables of contents of household chemical products. C is false. Tannery waste could contain suspended solids however the purpose why it’s highly polluting is as a result of it accommodates toxic chemicals. A high BOD check end result would inform Worknesh that there was lots of organic matter within the pattern. If this was discharged into the river it might remove oxygen from the water, love 420 sunflower all over print air jordan 13 sneakers which might hurt fish and other organisms dwelling in the river. Worknesh is a laboratory technician. She is analysing a pattern of wastewater collected from a pipe that discharges effluent into a river. Name two tests Worknesh might perform to assess the physical traits of the effluent. 9.   They every produce polluting liquid wastes that should be treated before being discharged into the setting. 7. The amount of natural matter in liquid waste is a crucial measure of its polluting potential. If discharged right into a river or lake, natural matter exerts an oxygen demand which might scale back the availability of oxygen for fish and different aquatic organisms. 6. Physical traits embrace the

quantity of suspended solids, the temperature and odour. The quantity of suspended solids is measured by filtering a known quantity of wastewater and weighing the solids retained on the filter. four. The characteristics of commercial wastewaters depend on the type of industry. Some industrial wastewaters are hazardous. 2. Liquid waste from home sources can be classified as blackwater, which accommodates excreta, and greywater, which doesn’t. Food production is a priority in Ethiopia and performs a major part in the financial system, with factories producing bread, beverages, sugar and a number of other other products. Many of the production processes require giant volumes of water and so a lot of the factories are located close to rivers or boreholes. Liquid wastes may be described based on their bodily, chemical, and biological characteristics.   Stormwater can be contaminated with many several types of pollutant similar to faecal matter, soil, rubber from car tyre wear, litter, and oil from autos. Many components of Ethiopia are confronted with large volumes of stormwater through the rainy season (Figure four.4). Where there is a sewerage network , stormwater may be channelled into the sewers, or it might flow into open ditches. The quantity and kind of liquid waste generated in a residential space is dependent upon a number of factors, similar to

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