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http://dx.doi.org/10.15681/KSWE.2017.33.1.63

A Study on the Advanced Treatment Process Improvement through the Dewatering Application an Expressway Rest Area Individual Sewage Treatment Plant  

Choi, Yoo Hyun (Department of Environmental Energy Engineering, Graduate of School Kyonggi University)
Joo, Hyun Jong (Department of Environmental Energy Engineering, Kyonggi University)
Publication Information
Journal of Korean Society on Water Environment / v.33, no.1, 2017 , pp. 63-69 More about this Journal
Abstract
Small size privately owned wastewater treatment plants have been difficult to treat their wasted sludge and maintain steady effluent quality compared with publicly owned wastewater treatment plants. Therefore, this study has focused on treatment efficiency enhancement, specially nitrogen removal efficiency by recycling dewatering filtrate as an alkalinity additive from filter press using $CaCO_3$. As the result, it was found that the optimal mixing ratio between the excess sludge and $CaCO_3$ was 1:2. The major operation parameters such as specific substrate utilization rate, specific nitrification rate, and specific denitrification rate were also improved 64% ($0.048-0.079mg\;BOD_5/mg\;MLVSS{\cdot}day$), 35% ($0.020-0.027mg\;NH_3-N/mg\;MLVSS{\cdot}day$) and 68% ($0.051-0.086mg\;NO_3{^-}-N/mg\;MLVSS{\cdot}day$), respectively, after the adoption of new methods. Therefore, both the problem of sludge treatment at small scale plants and the need for efficiency improvement could be solved.
Keywords
Advanced Treatment Process; $CaCO_3$; Dewatering Sludge; Filter Press;
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