| 摘要 |
A wastewater treatment apparatus is provided to solve CSO(Combined Sewer Overflow) problems, stably remove soluble contaminants, and reduce load of a subsequent process by recycling residual coagulated components, thereby increasing the settling efficiency. A wastewater treatment apparatus comprises: a first setting basin(10) for performing biosorption and first settling processes of wastewater to be treated; a bioreactor(20) for performing a biological reaction of effluent from the first setting basin; a second settling basin(30) for performing a second settling process of effluent from the bioreactor; and a biological filter basin(40) for removing soluble organic matters and ammonia nitrogen from effluent from the second settling basin, wherein a first return pipe(13) is installed on the first settling basin itself to return a portion of sludge discharged from the first settling basin to a mixing tank, a second return pipe(33) and a third return pipe(35) are installed on the second settling basin to return sludge discharged from the second settling basin to the first settling basin and the bioreactor, a fourth return pipe(43) is installed on the biological filter basin to return sludge discharged from the biological filter basin to the first settling basin, and a bypass pipe(17) is installed between the first settling basin and the biological filter basin to supply the portion of the treated water into the biological filter basin by bypassing a portion of treated water of the first settling basin. The first setting basin includes a plurality of inclined plates(11). |
