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http://dx.doi.org/10.4491/KSEE.2014.36.2.113

The Aeration to Improve Manganese and Chloroform of Effluent at Sludge Thickener of the Conventional Water Treatment Plant  

Choi, Ilgyung (K-water Unmun Office)
Beak, Inho (K-water Unmun Office)
Jeong, Chanwoo (K-water Unmun Office)
Lee, Sungjin (K-water Unmun Office)
Park, Jungwook (K-water Unmun Office)
Publication Information
Journal of Korean Society of Environmental Engineers / v.36, no.2, 2014 , pp. 113-118 More about this Journal
Abstract
So many nationwide drinking water treatment plants are under much difficulties by new reinforced discharged effluent standards. Generally, the sludge at thickener should be retended for a long time during usual days. Sometime, the soluble manganese and chloroform may be formed under the anaerobic condition in the sludge thickener when the sludge retention time is longer with low turbidity. This phenomenon results in difficulties to keep regulatory level of the discharged effluent. It was necessary to improve the operation conditions and process itself in order to meet water quality standard recently reinforced. For an effort to overcome the problems, a sludge aeration was successfully implemented into the thickening process. Sludge aeration prevent particle oxidated Manganese eluting soluble de-oxidated Manganese, excrete formated Chloroform from effluent to air, and improve sludge settling through homogenized sludge particle. We aerated sludge at the conventional water treatment plant, measured Manganese and Chloroform of clarified water at upper sludge, and solid-fluid interface height of sludge in mass cylinder. As a result, contaminant's concentrations of the final effluent was much decreased : 41% of manganese, approximately 62% of chloroform and 35% of sludge volume, compared with non-aeration sludge.
Keywords
Aeration; Sludge; Effluent Water Quality; Manganese; Chloroform; Sludge Volume;
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