| 摘要 |
Pollutants, such as heavy metals, phosphorus, and pathogenic organisms, are removed from water by adding a chemical coagulant to water within an enclosure. With mixing, coagulation and flocculation occur, and a floc containing the pollutant settles to the enclosure bottom; so the treated water above the floc is free from at least some of the pollutant. The water and the settled floc are mixed to resuspend floc components containing additional contaminant-removal capability. In an alternate system, the floc can be removed from the enclosure, dried, and added back to the enclosure to employ additional contaminant-removal capability. In another system, treated water is exposed to a pH buffering agent to reduce acidity therein.
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