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신춘환,김희숙,허근태 한국환경과학회 1996 한국환경과학회지 Vol.5 No.1
A recycling soap was prepared from non-cooking oils. The effects of physical and chemical properties of the recycling soap on biodegradation are expected to be different due to the thermal histories of the non-cooking oils. Therefore, the biodegradation rate of the recycling soap was studied by using Klebsiella pneumoniae(K. pneumoniae), and the growth rate of K.pneumoniae in soap solution was observed. The biodegradation rate of the recycling soap appeared to be slower as the thermal histories of the non-cooking oils became larger. This might be resulted from hydrolysis, in which the ester bonds in the oils are broken to produce hydroxyl group. It was also observed that the growth rate of the microorganism decreased with the increase in the thermal histories of the oils. As a result, it is desired that recycling soap should be produced from the non-cooking oils with the proper ranges of thermal histories to reduce water contamination. The non-cooking oils with larger thermal histories are considered to be recycling through the cracking process before used.
신춘환,김종현,한선홍 한국환경과학회 1994 한국환경과학회지 Vol.3 No.2
Various antimicrobial agents are widely used for the purpose of antimicrobial process. We investigated anlimicrobial activity and reduction efficiency of mal-ordour by the diphenyl ether compound (2,4,4' - trichloro - 2' - hydroxy diphenyl ether) against Staphylococcus aureus(S.aureus) and Proteus vulgaris(P.vulgaris) causing the mal-ordour. Especially, the diphenyl ether compound is not restricted to the regulation of water-contamination. In this research, we found that the optimum concentration of diphenyl ether compound was 1.5w% for both strains and antimicrobial expressions were c^0.38t = 2.56 for S.aureus, c^0.38t = 2.67 for P.vulgaris. We found also that -OH group played the role of antimicrobial functional group. Lastly, reduction effect of mal-ordour was more than 90% for both strain at the optimum conditions.
하ㆍ폐수 재이용을 위한 중수시스템 구성의 전기분해 반응조의 운전효율
신춘환,김동균 한국대기환경학회 2007 한국대기환경학회 학술대회논문집 Vol.- No.-
본 연구에서는 부산시에서 배출되는 하ㆍ폐수의 재이용을 위한 방편의 일환으로 중수 system을 개발하고 개발된 system의 응용도를 확정함으로서 수요를 창출하고자한다. 중수 system 구성의 1차 처리조인 전기분해장치의 후보 system을 선정하고 회분식 방식과 연속식 방식의 운전조건을 도출하였고, 실제 염색폐수에 적용하여 처리효율을 검토하였다.
신춘환,김종현 한국환경과학회 1992 한국환경과학회지 Vol.1 No.2
Because of varied functions and characteristics, water soluble polymers have long attracted much intrest in both academic and industrial fields, especially now in pollution problems such as wastewater treatment through ploymeric flocculants. In this regard, the main objective of this study is to synthesize polymeric floccuants containning hydrophobic group in presence of the potassium persulfate/sodium thiosulfate redox system and to estimate their flocculating ability on the kaolin suspension. In order to test the flocculating power of flocculant prepared on the kaolin suspension system, turbidity of the supernatant liquid, residence time, filtration rate of flocculated samples, have additionally been measured from the flocculation experiments and analysed in comparision with the theoretical background.