A city water supply is obtained from a deep aquifer. The water has uniform quality. It is
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- A city water supply is obtained from a deep aquifer. The water has uniform quality. It is clear and free of organics; hardness is in excess of 500mg/L and consists of both calcium and magnesium. Dissolved CO2 is approximately 15 mg/L and iron (Fe 2+) is about 1.0mg/L. Other dissolved constituents are below problem levels. Draw a schematic diagram of treatment plant that will render this water potable. Identify each unit and briefly state its purpose. Show points of chemical addition and identify the chemicals.
- A large stream flowing through a highly industrialized area must serve as a raw water supply for a community. The water is consistently turbid, and has refractory organics that are known precursors of trihalomethanes. Draw a schematic diagram of a treatment plant that should render this water potable. Identify all units, state their purpose, and show points of chemical addition. Identify all chemicals.
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