http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고농도 도시하수 처리를 위한 입상황 탈질 반응조의 설계 및 운영인자 평가
김용학(Yong Hak Kim),채규정(Kyu Jung Chae),임성균(Seong Keun Yim),이영만(Young Man Lee),배우근(Woo Keun Bae) 大韓環境工學會 2010 대한환경공학회지 Vol.32 No.12
독립영양탈질은 추가적인 질소 제거를 위해 메탄올과 같은 고가의 외부탄소원을 필요로 하지 않는다는 면에서 효과적이고 경제적인 방법이다. 본 연구에서는 고농도 질소 농도를 함유한 하수에 대한 황탈질 평가를 통해 설계 및 운영인자의 도출에 필요한 기초자료를 확보하고자 하였다. 입상황으로 충진된 황탈질조는 유동형 스폰지 담체를 이용하여 영양염류를 제거하는 고도처리 공정 후단에 파일럿 규모로 설치되었다(Q=18 m3/day). 외부 알칼리 주입 없이 황탈질조 유입수 내 알칼리(평균 169.4±20.8 mg CaCO₃/L)만을 활용하였고, 2.45시간의 체류시간으로 운영된 황탈질조 내 추가적인 질산성 질소의 제거를 통해 최종 처리수의 총질소가 7.0 mg T-N/L 이하로 도출되었다. 파일럿 설비 평가를 통해 동절기 저수온(15℃ 이하)에서도 60~80%의 안정적인 황탈질 제거효율을 나타내었으며, 2.78 ppm 이내의 Alum 주입 시 황탈질 성능에 거의 영향을 주지 않는 것으로 나타났다. 황탈질조에서 제거된 질산성 질소 대비 소모된 알칼리도는 4.09±1.29 g CaCO₃/g NO₃(-)-N로 도출되었고(이론 값 4.57 g CaCO₃/g NO₃(-)-N), 황탈질조 유입수 내 질산성 질소의 전환에 필요한 알칼리도 이상을 포함하였다. 입상황의 소모량은 943.8 g S/day로서, 구형입상황의 마모 및 역세 시의 유실 등에 의해 이론적 소모량인 400.1 g S/day 대비 2.4배 정도 높게 나타났다. Autotrophic denitrification is known as an effective and economical alternative for heterotrophic denitrification using external carbon sources such as methanol. In this study, we evaluated design and operation parameters for a sulfur denitrification reactor (SDR) treating high strength nitrogen wastewater. The SDR was filled with spherical sulfur media in connected to a pilot-scale nutrient removal process (daily flow rate, Q=18 m3/d) using moving spongy media. Total nitrogen (TN) concentration of the final effluent was below the 7.0 mg TN/L because nitrate was additionally removed through autotrophic denitrificationin without adding alkalinity (initial alkalinity was 169.4±20.8 mg CaCO₃/L). During the test period, 60~80% of nitrogen in the influent was removed even in low temperature (below 15℃). The alkalinity consumption for nitrate removal in SDR was 4.09±1.29 g CaCO₃/g NO₃ --N, and the residual alkalinity of influent of SDR was higher than that of theoretical requirements for full conversion of nitrate. The consumption of sulfur was 943.8 g S/d and it was 2.4 times higher than theoretical value (400.1 g S/d) due to abrasion and loss of sulfur media in backwash, etc.
폴리우레탄담체를 이용한 합성폐수 및 피혁폐수의 생물학적 처리
김선형(Sun Hyung Kim),박희동(Hee Deung Park),임성균(Seong Keun Yim),최광호(Kwang Ho Choi) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.3
In this study, removal characteristics of nutrient were evaluated using new developed multi-porous polyurethane media(BIOCUBE) with synthetic wastewater and leather industry wastewater as influents. According to the lab. test using synthetic wastewater as influent, to select the best suitable media, removal characteristics with media size and pore size were estimated. Then removal efficiencies of nutrients based on the organic and the ammonia load were tested. For the test of application of industrial wastewater, removal characteristics of organics and nitrogens by introducing leather industry wastewater were evaluated. As regards test with pore size and media size, 40ppi media were better than 20ppi media and 10㎜×10㎜×10㎜ were about 2 times as high as 20㎜×20㎜×20㎜. As test by synthetic wastewater, organic removal efficiencies of BIOCUBE process were 2.5∼3 times as high as those of conventional activated sludge process and nitrification rates were 3∼4 times. Introducing by leather industry wastewater, organic removal efficiencies and nitrification rates were so high but denitrification rates were so low because of lack of carbon sources.