| Title |
A Study on the Advanced Treatment Process Improvement through the Dewatering Application an Expressway Rest Area Individual Sewage Treatment Plant |
| Authors |
최유현 ( Yoo Hyun Choi ) ; 주현종 ( Hyun Jong Joo ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.1.63 |
| Keywords |
Advanced Treatment Process; CaCO3; Dewatering Sludge; Filter Press |
| Abstract |
Small, privately owned wastewater-treatment plants have had a problem in treating their wasted sludge and maintaining steady effluent quality as compared with publicly owned wastewater-treatment plants. Therefore, this study has focused on how to improve treatment efficiency, specially nitrogen removal efficiency, by recycling filtrate as an alkalinity additive from filter press using CaCO3. It was found that the optimal mixing ratio between the excess sludge and the CaCO3 was 1:2. The major operation parameters, such as specific substrate utilization rate, specific nitrification rate, and specific denitrify-cation rate, were also improved by 64% (0.048-0.079 mg BOD5/mg MLVSS·day), 35% (0.020-0.027 mg NH3-N/mg MLVSS·day) and 68% (0.051-0.086 mg NO3--N/mg MLVSS·day), respectively, after the adoption of new methods. Therefore, both the problem of sludge treatment at small scale plants and the need for efficiency efficiency could be solved. |