| Title |
A comparative study on waste treatment efficiencies between activated sludge , fixed - film and fluidized - bed biological reactors |
| Authors |
안갑환 ; 박태주 ; 송승구 ( Kab Hwan An ; Tae Joo Park ; Seung Koo Song ) |
| Abstract |
A number of experiments to treat wastewater of a dye-plant were conducted to evaluate the treatment efficiency of an aerobic fixed-film reactor, a fluidized bed reactor, and a completely mixed activated sludge reactor upon the variation of organic loading rates. The media used in this fixed-film reactor were SARAN 4000D(media A) of specific surface area, 153㎡/㎥ and SAEAN 1000D(media B) of specific surface area, 308㎡/㎥ and the supporting material of this fluidized-bed reactor was 0.6 - l.2 ㎜ in diameter granular activated carbon. The influent COD concentration was ranged from 1040 to 5365㎎/ℓ. Maximum COD removel efficiencies with 600% diluted wastewater were marked to 90% with a fluidized bed reactor, 83% with an aerobic fixed-film reactor and 77% with a completely mixed activated sludge reactor. But in case of 200% diluted wastewater, COD removel efficiency was 63-83% with an aerobic fixed-film reactor, 46-67% with a fluidized bed reactor 40-46%, with a completely mixed activated sludge reactor. It was assumed to be the toxcity of high concentrated influent of wastewater. Within the range of organic loading rates, average biomass concentration were shown as 7,000㎎/ℓ in an aerobic fixed-film reactor, 6,300㎎/ℓ in a fluidized-bed reactor and 1,700㎎/ℓ in a completely mixed activated sludge reactor. |