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DOI : , Vol.22, No.2, 89 ~ 98, 2014
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| Title |
| Development of Pilot Plant Slow Mixing/Sedimentation Net3FM System for Reject Water Treatment from the Side-stream of Wastewater Treatment Plant |
| 장정국 Jeong Gook Jang , 이승헌 Seung Heon Lee , 박종태 Jong Tae Park , 조명찬 Myung Chan Jo , 김미란 Mi Ran Kim , 김정숙 Jeong Sook Kim |
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| Abstract |
| This study was carried out to develop the combined pilot plant slow mixing/ sedimentation and Net3FM(Net Fit Fiber Filter Module) system for reject water treatment from the side-stream of wastewater treatment plant. The sources of reject water are centrifugal thickening supernatant and dehydration leachate. The SS and T-P concentration ranges of supernatant were 100.0~6,820.0 mg/L and 19.2~48.7 mg/L, respectively. PACl(17% liquid) was used as coagulant, and the optimal coagulant dosage was 3 : 1 as Al/P molar ratio in this experiment. The SS concentration of reject water was reduced from 440 mg/L to 133.3 mg/L in slow mixing/sedimentation system. And also, the removal efficiency of T-P was increased due to the SS removal by slow mixing/ sedimentation in combined system. In coagulant injection by in-line mixer, SS and T-P concentrations of final effluent in this system were 5~10 and 3.0~3.4 mg/L. The removal efficiencies of SS and T-P were highly increased to 98.9% and 92.7%, respectively. These results was obtained due to the combined system which is consisted by rapid coagulation, cyclone sedimentation and fiber filtration. Therefore, the combined system(slow mixing/sedimentation Net3FM system) could be evaluated that the removal efficiency of pollutants in reject water and the utilization potential as reclaimed water technology were very high. |
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| Key Words |
| reject water treatment, slow mixing/sedimentation, fiber filter, coagulation |
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