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Abstract

A treatment system for collecting storm water from an industrial area and removing suspended and dissolved pollutant materials from the storm water. Storm water is accumulated and delivered to a filtration apparatus in which suspended pollutants are removed by filtration, while dissolved materials, particularly heavy metals including zinc and copper, are removed by chemical chelation in a bed of compost filter media having a high humic acid content and which is kept consistently moist. A sparger provides for wide and generally uniform distribution of the storm water over the bed of filter media and provides for slow passage of the storm water through the filter bed, thus giving a long contact time of the storm water with the filter media in order to promote and enhance chemical chelation progress to chemical equilibrium and removal of a high percentage of dissolved metals, and particularly dissolved copper and zinc.

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First Claim