유용미생물제제를 이용한 도심 오염 상류 하천의 친환경적 악취제어 및 수질정화 연구

Abstract

Dongchun, one of the representative streams in the urban area in Busan, is a river that carries Hogye Stream, Bujun Stream, Junpo Stream, Danggam Stream and Gaya Stream in its upper streams. Hogye Stream has been mostly covered with concrete structures for decades, causing sewage pollution from the upstream, overflow of the downstream region and other serious pollution that gave rise to many civil complaints from the residents nearby. This problem is particularly severe in the Anchang Town at Donggu region since there has been no sewage treatment system installed in the town. Designated as one of the target areas for an urban restoration of Busan, residents in the town are urgently requesting restoration of the stream environments including odor control and water remediation. In this study, we analyzed water quality and malodor changes of Hogye Stream for the three chosen stations after bioaugmenting the microbial agent (BM-2) for a few months including the rainy season. An activity of augmented bacterial agent on the station (Middle) was initially expected to be relatively higher and thus show lower levels of COD than the upstream site (Chuhhae). However, it turned out that the removal effect of COD was not clear probably due to a flooding in the rainy season and too much incoming pollutants to remove considering the amount of microbial agent augmented into the stream. However, in the case of efficiency of odor control after 2 months of BM-2 treatment, the average control effect at the station (Middle) was about 65% indicating the microbial activity in reduction of malodor in the polluted stream. It was concluded that the bioaugmentation technology was effective in the malodor control and could be applied t other similar streams and improve their water qualities.