Environmentally friendly filtration

摘要

In 1914, when Jackson, Miss., built its first drinking water treatment plant, it was standard operating procedure to discharge untreated residuals into local waterways. A second plant, built in 1992, did the same until a residuals handling facility was added in 1997. By 2006, the Mississippi Department of Environmental Quality was threatening to fine the city $25,000/day for using the Pearl River as an effluent filter, demand was close to overwhelming the plants'combined 67-mgd capacity, and neither could meet the EPA's Long Term 2 (LT2) Enhanced Surface Water Treatment Rule.