| Title |
Application to Microfiltration Process with Activated Sludge in Landfill Leachate Treatment |
| Authors |
김시준(Shi Jun Kim),이병헌(Byung Hun Lee),김정숙(Jeong Sook Kim) |
| Abstract |
Landfill leachates contained high concentration of COD(chemical oxygen demand), BOD (biochemical oxygen demand), nitrogen compounds and inorganic salts. It is very difficult to treat those recalcitrant substances by using conventional biological treatment. ASMF consists of activated sludge process and microfiltration membrane. This membrane with a pore size of 0.1 ㎛ is immersed in a biological reactor and separated sludge from treated water by suction filtration. Low pressure and MLSS(mixed liquid suspended solid) concentration of 10,000 to 20,000㎎/L could kept for stable permeate flux of 140L/㎡·day and prevented from membrane fouling without chemical cleaning during 140 days. An intermittent aeration and suction filtration mode(aeration and suction filtration phase ; 30 minutes, anoxic phase; 60 minutes) had an good effect on high COD_(cr) removal of 93 percents. But, this operation mode showed low TN(total nitrogen) removal of 35 percents. |