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| tertiary treatment The process which remove pollutants not adequately removed by secondary treatment, particularly nitrogen and phosphorus; accomplished by means of sand filters, microstraining, or other methods (referring to wastewater treatment) | |||
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| tertiary treatment The process which remove pollutants not adequately removed by secondary treatment, particularly nitrogen and phosphorus; accomplished by means of sand filters, microstraining, or other methods (referring to wastewater treatment) | |||