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오리나무 열매를 이용한 생물처리장치에서의 톨루엔 가스 처리효율 특성
공남식,차수길,서정윤 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.6
This study was to examine characteristics of treating toluene vapor, which gets to be problematic due to its harmful carcinogenicity and mass generation from various sources, through a biological treatment facility which is environment-friendly and adopts a high-efficient and low-cost clean technology. In order to identify whether Alnus Firma Fruit (AFF) can be used as a media for a bioreactor, its utility and basic operating factors, a study was conducted on pressure drop, supply of nutrient substances and retention time which are operating factors of a biofilter, and eliminating characteristics were compared between AFF and the conventional biological activated carbon (BAC) widely used as filter media. In the case of AFF, the initial microbial deposits was 2.3 X 10^(7) CFU/g dry AFF, which represents the initial microbial density higher than the case of BAC showing 5.5 x 10^(6) CFU/g dry BAC. And it took about 2 weeks to acclimate until its eliminating rate got to be increased over 90%. As a result of comparing pressure loss taking place with the lapse of time between BAC and AFF, after 130 days passed at SV 25 h^(-1), BAC showed that its eliminating efficiency had a tendency to drop greatly due to a great pressure loss (0.53-> 54.7 ㎜H₂O/m) caused by an excess of biomass as accumulated. On the other hand, AFF showed that the pressure drop was 0.53 ㎜H₂O/m, about 2 times as much as the initial pressure loss of 0.4 ㎜H₂O/m, which represents no great change in the pressure loss, and its eliminating efficiency was also shown to be continuously high. Therefore, when AFF was used as a filler for a biological treatment facility, a biological filter enabling improvement of the purifying efficiency to be promoted could be provided, and moreover, the pressure loss was so small that the filler replacement cycle or the back flushing cycle could be extended. So, even in terms of the operating cost, it was identified to be an economical filler. When an inorganic material was used as a filler, the biofilters performance acted sensitively on whether nutrient substances were supplied or not. In the case of AFF with low adsorptivity, addition of ethyl-alcohol increased the solubility of toluene, and consequently, biodegradation got to be actively made by microbes, and thus, its eliminating rate could be increased. As the flow velocity and the inflow concentration got to be more increased, its eliminating rate got to be lower, and particularly, an increase in the flow velocity made its eliminating rate drop more greatly than an increase in the concentration.
김범진,김순천,공남식,노승만,김진철,박영일 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Imidazole 기반의 촉진제는 epoxy 기반의 코팅, 접착제 등에 범용적으로 사용되는 재료이다. 최근 공정 효율화를 위해 빠른 경화가 되는 신규 경화 촉진제 개발이 산업계에서 이슈화되고 있고 imidazole 기반의 촉진제는 보관 안정성 떨어지므로 일액형 코팅 또는 접착제 개발에 한계가 있다. 따라서 본 연구에서는 imidazole 의 dimer system 을 적용한 신규 촉진제를 개발하였고, 그 재료에 대한 경화 온도 및 특성, 보관 안정성에 대한 다양한 분석을 진행하였으며 그에 대한 토의를 하고자한다.
염분이 함유된 폐수의 생물학적 처리시 염분농도가 오염물질의 제거에 미치는 영향
김상수,문병현,이택순,서규태,공남식 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-
Effects of salt concentration and C/N ratio on pollutants removal efficiencies were investigated in treatment of seafood wastewater by sequence batch reactor(SBR). The synthetic seafood wastewater containing salinity from 3,000 to 10,000 mg/L NaCI and C/N ratio of 2 and 4 was treated by SBR. Removal efficiencies of COD_(Mn), T-N, and T-P decreased with increasing salt concentration, but eventually reached a pollutants removal a platrau. As systems adapted in salts until salts concentration of 8,000mg/L, the time required to reach the pollutants removal efficiencies at steady state was reduced. However, the removal efficiencies of pollutants sharply decreased and the time require to reach steady state was increased as salt concentration rose to 10,000mg/L, Removal efficiencies of COD_(Mn) were higher for C/N ratio of 4 than for 2. Effects of salt on the nitrogen removal were not faster than the organic removal but the time required to the nitrogen removal at steady state was ncreased. The removal efficiencies of phosphorus also were redueed as salt concentration increased, which inhibited the release of phosphorus than the uptake.