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KMID : 1156220110370060467
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Journal of Environmental Health Sciences
2011 Volume.37 No. 6 p.467 ~ p.473
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Conditioning and Dewatering Properties of Digested and Thickened Sludge with Inorganic Conditioner
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Kim Jeong-Ho
Nam Se-Yong
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Abstract
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Objectives: Wastewater treatment plants typically produce a large volume of waste sludge. In this study, the conditioning and dewatering properties of a digested and thickened sludge from an industrial wastewater treatment plant were investigated in order to improve the dewaterbility of the sludge.
Methods: Jar-tests and Buchner funnel tests were carried out to assess the conditioning and dewatering properties of a waste sludge. TTF (Time to Filter Test) and SRF (Specific Resistance to Filtration) were adopted as the indices of sludge dewaterbility.
Results: The valuation indices influencing the dewaterbility of the waste sludge, including TTF, SRF, water contents, VS/TS ratio and turbidity, were measured. The TTF and SRF of the digested and thickened sludge were decreased to 40 sec, 3.43 × 1012 m/kg, and 39 sec, 1.09 × 1012 m/kg, respectively.
Conclusions: The conditioner composed of natural inorganic materials turned out to be effective in the reduction of sludge water contents.
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KEYWORD
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Sludge dewatering, Conditioning, Inorganic conditioner
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