| Title |
Automatic T-P Coagulation Control System using an EC in the MSBR Process - Full Scale Study - |
| Authors |
장희선 ( Hee-seon Jang ) ; 이호식 ( Ho-sik Lee ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.1.90 |
| Keywords |
Automatic Control System; Coagulant Dosage; EC; MSBR; Phosporus |
| Abstract |
Many sewage-treatment plants have applied the advanced technology of chemical coagulant system to remove phosphorus in Korea. However, there are some problems with the injection of optimum coagulant dosage. In order to solve these problems, research on the more cost-effective automatic total phosphorus coagulation control system using an EC (Electrical Conductivity) has been in progress. This study was conducted by the same process and operation method as the Lab scale for public, small-town sewage-treatment plants. First, it confirmed the correlation among the EC, PO4-P, and coagulant dosage in the Lab-scale MSBR (Membrane Sequencing Batch Reactor) process. Next, it found the correlation coefficient of EC and the coagulant dosage was 0.92 in the Full-scale MSBR process. As a result, not only was the T-P removal efficiency doubled, but the process also it satisfied the effluent water-quality standard in a stable manner. In addition, by applying the automatic control system using the EC, the coagulant dosage could be reduced by 28% compared to the fixed coagulant injection system. |