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Wastewater and its Treatment

Wastewater and its Treatment. Peyton Hager Shaelyn Lizee Danielle Carr. City Wastewater Treatment. Septic systems are the most common method for waste water disposal. Primary treatment of waste water removes about 60% of suspended solids from wastewater.

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Wastewater and its Treatment

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  1. Wastewater and its Treatment Peyton Hager Shaelyn Lizee Danielle Carr

  2. City Wastewater Treatment • Septic systems are the most common method for waste water disposal. • Primary treatment of waste water removes about 60% of suspended solids from wastewater. • Wastewater then proceeds to Secondary treatment where roughly 90% of suspended solids are removed.

  3. Wastewater Treatment Cont. • Finally, after wastewater has gone through primary and secondary treatment, the clarified water is treated with chlorine to kill bacteria, sometimes ultraviolet light. • Treatment water, or effluent, is piped into rivers or oceans after both treatments.

  4. Wastewater being purified • Sludge that is removed from wastewater is sent to digesting vats, where microorganisms decompose most of the matter. • The result, a wet solution of “biosolids” is then dried and either disposed of in a landfill, incinerated, or used as fertilizer on cropland.

  5. Artificial Wetlands • Wetlands are already natural water purifiers • Wastewater the has gone through primary treatment at a conventional facility is pumped into a wetland. • Microbes in algae and aquatic plants decompose and filter the remaining pollutants. • The “treated” water is then released into waterways or left to percolate underground • Constructed wetlands also serve as havens for wildlife and areas for human recreation

  6. FUN FACT!!! • Each year about 6 million dry tons of sludge are generated in the U.S. (EWWW!)

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