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축산폐수처리에 있어서 전처리 약품주입이 없는 친환경적인 HM공법의 특성에 관한 연구
이현기 ( Hyeon-ki Lee ),이영호 ( Young-ho Lee ),권병훈 ( Byung-hoon Kwon ),노형곤 ( Hyoung-gone Roh ) 한국환경기술학회 2022 한국환경기술학회지 Vol.23 No.4
This study was conducted for the purpose of using the HM method as basic data for livestock waste treatment facilities. As a result of analyzing the treatment characteristics of each process of the eco-friendly HM method and analyzing the effluent water treatment characteristics, the following conclusions were obtained. In the pretreatment process, the removal efficiency by centrifugation was found to be 59.1 %, TOC 55.2 %, SS 61.1 %, T-N 46.7 %, and T-P 38.0 % removed. In the analysis by process, the removal efficiency of water quality items of discharged water was high at BOD 97.7 %, TOC 99.0 %, SS 99.7%, T-N 98.2 %, and T-P 99.6 %. In order to analyze the water quality characteristics of the effluent water, the water quality standard items of the 120 m<sup>3</sup>/day treatment facility were analyzed as BOD 1.9 mg/L to 4.2 mg/L, COD 16.6 mg/L to 48.8 mg/L, SS 1.6 mg/L to 11.0 mg/L, T-N 8.400 mg/L to 38.030 mg/L, and T-P 0.051 mg/L to 0.644 mg/L. This resulted in a relatively high treatment rate due to a very high concentration of inflow water, and in all items, it was measured below the effluent water quality standard of the treatment facility installed by the livestock manure treatment company. According to the calculation of the cost of injecting coagulant and carbon source, which can be saved by the eco-friendly construction method without using chemicals, the cost of a daily treatment amount of 120 m3/day is reduced by about 130 million won per year.
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