| Title |
Removal of Phosphorus and NOM in Wastewater Effluent Using Ejector·BAF System |
| Authors |
장영호 ( Young Ho Jang ) ; 강동한 ( Dong Han Kang ) ; 김극태 ( Keug Tae Kim ) ; 임홍빈 ( Heung Bin Im ) ; 황찬원 ( Chan Won Hwang ) ; 김미정 ( Mi Jung Kim ) ; 신형순 ( Hyung Soon Shin ) |
| Keywords |
Biological aerated filter; BAF; Dissolved organic carbon; DOC; Ejector; Line velocity; LV; Natural organic material; NOM |
| Abstract |
Abstract While the existing sewage treatment facilities are mainly being operated by biological processes, winter-time efficiency improvement and additional phosphorus treatment equipment using chemicals have been required to follow the effluent criteria of TP (0.2, 0.3 and 0.5 mg/L for the zone of I, II and III respectively) and BOD5 (5.0 mg/L) which is intensified from 2012 in Republic of Korea. We made an investigation into actual condition of biological treatment process and calculated the optimal chemical input amount by jar test of supernatant of secondary sedimentation tank to evaluate the process improvement for the intensified criteria. Ejector BAF system for removing TP, BOD5 of sewage effluent was suggested. The concentration of TP from biological process is 0.3-0.8 mg/L, and the input amount of optimal chemical coagulant was above Al/P ratio of 3(1.9 mg/L as Al) to meet the criteria of TP for secondary treatment effluent. From the results of this experiment, the best Al/P ratio for Ejector BAF system was about Al/P ratio of 1, and LV of BAF process for intensified criteria of BOD5 and TP was below 1.97m/hr. |