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Transcript of Water Treatment
-Recreation and Quality of Life
-Health Concerns What are the two product of sewage treatment? -An environmentally-safe fluid waste stream
-Solid waste ( Treated Sluged ) What is removed during " primary " wastewater treatment? -Greased
-Oil What is removed during " secondary " wastewater treatment? -biodegradable soluble organic contaminants Ex: Sugar, fats, most of organic short-chain carbon molecules..., etc What is the purpose of " tertiary " wasteawter treatment? The purpose of tertiary treatment is to provide a final treatment stage to raise the efluennt quality before it is discharged to the receiving environment (sea, river, lake, ground, etc.). NOTE : If disinfection is practiced, it is always the final process. It is also called "effluent polishing." What two things do the biota require? What machine is used for primary sewage treatment? - Primary clarifiers or Primary sedimention tanks - Oxygen
- food What two contaminants are usually found in the water used to cool blast furnaces? -Ammonia
-Cyanide -sulfuric acid
-hydrochloric acid What two acids are commonly used in the iron and steel industry? What are the principal waste-waters associated with mines and quarries? - slurries of rock particles in water. Rendering is a process that converts waste animal tissue into value-added materials. Rendering can refer to processing of animal byproducts into more useful materials, or more narrowly to the rendering of whole animal fatty tissue into purified fats What is required for the processing of food from raw materials? Toxic metals can often be precipitated out of waste water by changing what? - Changing ph value or using other chemical Where is a common place where the agricultural waste is in the form of a liquid slurry? -A common place where the agricultural waste is in the form of a liquid slurry is an agricultural recycling plant Why does disposal of wastewater containing animal waste upstream of a drinking water intake possibly pose serious health problems? − Soil washed off fields is the largest source of agricultural pollution. Excess sediment causes high levels of turbidity in water bodies, which can inhibit growth of aquatic plants, clog fish gills and smother animal larvae. What is "silage" made up of? - Silage is made either by placing cut green vegetation in a silo, by piling it in a large heap covered with plastic sheet, or by wrapping large bales in plastic film. Silage is fermented, high-moisture fodder that can be fed to ruminants (cud-chewing animals like cattle and sheep) or used as a bio fuel feedstock for anaerobic digesters. What is "silage" made from? − It’s usually made from grass crops, including corn (maize), sorghum or other cereals using the entire green plant (not just the grain). Why does animal "dipping" cause a major pesticide runoff problem? - Dipping vats are used for the control of several species of pests affecting domestic animals. They are designed for submerging animals in a pesticide solution. Runoff occurs as water runs over a sloping surface, carrying pesticides either mixed in the water or bound to eroding soil. Runoff may occur when gray water from an animal dip is discharged to an inappropriate site. What pollutants are found in milking parlor wash-down water? - Milk Solid and Manure are two pollutants found in milking parlor wash-down water.