| Title |
Reuse Possibility of By-pass Flow and Secondary Effluent using BAF |
| Authors |
안지훈 ( J. H. Ahn ) ; 박종복 ( J. B. Park ) ; 김성원 ( S. W. Kim ) ; 박재홍 ( J. H. Park ) ; 하준수 ( J. S. Ha ) ; 최의소 ( E. Choi ) |
| Keywords |
BAF; First flush; Nitrification; Reuse; Tertiary treatment; Reuse |
| Abstract |
The laboratory and pilot scale BAFs (biological aerated filters) were operated with 0.3 hr to 1.1 hr EBCT(empty bed contact time) at a maximum filtration rate of 472 m³/m²/day as a treatment method for reuse of secondary effluent and by-pass flow in this study. The effluent BOD and SS were generally 3.5 to 5 ㎎/L and 2 to 3 ㎎/L, respectively with 2ndary effluent, but the SS concentrations increased to 4 to 8 ㎎/L with the increased flow rates of by-pass flow. Potential nitrification rates were very high, but the nitrogen removal efficiencies were low due to the limited carbon sources. Bypass of a part of primary effluent seemed to be desirable to increase the nitrogen removal. Disinfection must be furnished for the reuse of BAF effluent. |