염소계 유기산업폐수의 처리공정 개발

신항식 嶺南大學校 環境問題硏究所 1993 環境硏究 Vol.13 No.1

해당정보 없음

상수에서 조류 및 조류 부산물질 제거방안

신항식,전항배 嶺南大學校 環境問題硏究所 1998 環境硏究 Vol.17 No.2

하수처리의 문제점과 연속접촉회분식 반응조를 이용한 고도처리

신항식,남세용,이상형 경산대학교(대구한의과대학) 1999 環境硏究 Vol.4 No.1

The volume of sewage increases as the population grows and the standard of living rises, and also varies in direct proportion to the volume of available water supply. Present1y(at the end of 1998), the sewage treatment ratio is 60%, and 85 facilities are woiking for sewage treatment While sewage treatment plant has been constructed in large cities and heavily industrialized cities, the most treatment plant employ one type of process, i.e. activated sludge process, which may not be desirable for some cities in economical point of view and also in terms of process optimization. Moreover, poor sewer systems resulted in lower strength influet than the designed strength. In this study, to develop a proper process for treating low strength sewage several existing sewage treatment plants were diagnosed. A continuously contacted sequencing batch reactor composed of pre-anoxic contact zone and intermittently aerated zone was operated for biological nitrogen removal. The removal efficiencies of organic matter (SCOD) and total nitrogen (T-N) were 89% and about 60% at the TCOD/T-N ratio as low as 6.0, respectively.

완속여과 시스템에서 입자 제거와 손실수두(headloss)의 관계

신승식,홍진아,전항배 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.1

The operational performance of slow sand filters can be considerably improved by the application of a layer of non-woven synthetic fabric to the top surface of the sand media. This improvement is manifested in terms of an increased filter run time and the avoidance of headloss development within the sand media. The relationship between particulate removal and headloss development were investigated with two pilot-scale slow sand filters(filter A and filter B(ACF)) of which diameter was 140 mm and packed with sand in the depth of 850 ㎜. One of the filters was amended by covering the surface of slow sand filters with a ACF(activated carbon fiber) of which specific surface area was more than 1000 ㎡/g and thickness was 3 ㎜. Effective size and uniform coefficient of the sand medium was 0.31 ㎜ and 2.0 respectively. Initial filtration rate was 0.167 m/hr and the raw water turbidity and pH were in the range of 1.5-2.0 NTU, and 7.0-7.7, respectively. The particle removal efficiency of small than 2 ㎛ showed 86, 78% and greater than 3 ㎛ showed 96, 95% in the slow sand filter A and B(ACF), respectively. NPOC removed within upper 50 ㎜ depth and Schmutzdecke in slow sand filter B(ACF). Therefore, amended slow sand filter with non-woven fabric could reduce filter ripening time.

정반 평면도 평가를 위한 측정점의 합리적인 개수의 결정

신상철,현창헌,박흥식 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-

The flatness is the most important nature for the surface table. For finding such a flatness, the surface is surveyed along a number of straight lines parallel to the edges of table, which form a grid. Next, the variations in height of the grid points are measured relative to a datum point. If the number of such points is increased. It is not necessarily to use many grid points for finding the original flatness ofa measured surface tabel. So it is necessary to find the rational quantity of such grid points. It is found that about 220 points per 1 m? of surface tabel for measurement is the rational quantity with less than about 15% error of the original flatness.

Denitrification and Dephosphatation by DPB at the Anoxic Stage on BNR Process

이상형,신항식 대구대학교 환경기술연구소 2005 미래환경기술 Vol.1 No.2

The denitrification activity of DPB at the anoxic stage was investigated by analyzing organic and nitrogen balances at the selected internal recycle ratios. Moreover, for verification of the microbial community, the identification of microbiology accomplished using the PCR-DGGE method. As the internal recycle ratio increased 1 to 3, the amountsof anoxic phosphorus uptake and nitrate reduction rate increased due to the improved activity of DPBs in the anoxic state. In batch test, the nitrate removal efficiencies by denitrifiers and dephosphatation by DPBs were 76 % and 24 % of total nitrate removal efficiency, respectively. Most PAO species from the sludge using synthetic wastewater were affiliated with the beta subclass of the Proteobacteria. The species detected belonged to two genera: Dechloromonas and Rhodocyclus. However, Acinetobactersp., Aeromonas sp. and Pseudomonas sp., which historically have been considered dominant in phosphorus removing sludge communities, were not detected.

SBR에서 탈질효율 향상을 위한 운전인자 연구

이상민,신항식 대구대학교 환경기술연구소 2004 미래환경기술 Vol.1 No.1

본 연구는 국내 하수의 특성인 저 C/N비와 이로 인한 총질소 제거효율 저하현상을 최소화하기 위해서 SBR공정을 이용하여 탈질효율 향상을 위한 최적운전인자 도출하기 위해 일반적인 SBR, 간헐포기방식 SBR, Step-feeding방식 SBR 세가지 형태의 운전방식을 비교 검토하였고 또한 SBR에서의 유입수 주입비율, 주입시간 등의 변수에 대해서도 조사되었다. 탈질효율 향상을 위한 운전 결과 간헐포기식 SBR, step-feed SBR이 기존 운전모드에 비해 탈질효율을 증가시켰고 특히 Step-feeding SBR이 가장 우수한 탈질효율을 보여주었다. Step-feeding SBR의 탈질효율은 95%이고, 다음이 간헐포기식 SBR이 61% 그리고 재래식 SBR이 19%를 나타내었다. Enhanced denitrification was performed using modified SBR operations. Controlling the fill volume, fill time, and changing feeding methods of SBR could enhance denitrification efficiencyand reduced effluent nitrate concentration without external carbon addition. Denitrification efficiency increased as to decreasing of fill volume. The step-feed could enhance denitrification efficiency and maintained low concentration of nitrate concentration which was reduced from 14 to 2 mg/L. The three type of the modified SBR operations that were conventional SBR, IA-SBR, and step-feed SBR was tested through pilot scale SBR process. The denitrification efficienty of the step-feeding SBR was best among the three SBRs and followed by IA-SBR, and conventional SBR. Those were 95%, 61%, and 19%, respectively.

Ehrlich 암세포에 대한 Acriflavine-Guanosine 복합제 (AG60)의 항암효과 -광학현미경적, 자기방사법적 및 전자현미경적 연구-

안의태,고정식,김형진,김상건,이경영,강종구,유보림,정영신,홍은경,한영복 대한해부학회 1999 Anatomy & Cell Biology Vol.32 No.2

동물성 지방의 재활용 방안에 관한 연구

김남천,이시진,신항식,송영채 한국유기성폐기물자원화협의회 1993 유기성폐기물자원화 Vol.1 No.2

본 연구에서는 우리나라의 동물성 생지방의 발생 실태 및 유통현황에 대해서 조사, 분석하여 제반 문제점을 파악하고 적절한 유통근대화 방안을 제시하였으며, 생지방이 환경에 미치는 영향 등에 대한 연구를 종합적으로 수행하여 최종처리, 재활용 등 효과적인 관리대책을 제시하고자 하였다. 생지방의 발생원은 전국에 산재한 170여개의 도축장과 280여개의 육가공공장을 비롯한 식육점, 음식점 등으로서 식육의 모든 유통과정과 관련성이 크며, 수도권에만 60%이상의 발생원이 집중되어 있는 것으로 밝혀졌다. 현재 전국에서 발생되는 생지방의 1일 발생량은 약 650-750여톤으로 300여명의 수집원이 손수레, 자전거, 오토바이 등의 낙후된 수거 장비를 등원하여 수거하고있으며, 약 60여개에 이르는 수집상은 수집원으로 부터 생지방을 매입하여 재활용 공장으로 운송하고 있다. 그러나, 유통업계의 현실은 영세성과 전근대적인 경영방법, 거래형태의 무질서등의 문제점을 내포하고 있으며, 결국 유통체계의 혼란을 야기시켜 정상적인 생지방 재활용업계의 발전을 저해하고 있어 적절한 관리 및 유통구조의 근대화를 위한 행정적인 지원 및 제도적인 장치가 필요한 것으로 사료된다. 유통구조의 근대화 방안으르 효율적인 유통경로가 제시되었으며 유통산업의 대형화, 계열화 등을 통하여 수거효율의 향상과 유통마진율의 절감효과를 얻을 수 있는 것으로 분석되었다. In this study, generation characteristics and distribution situation of the animal fat residue were investigated to identify it's management problems and to propose alternatives for the recycling and final disposal. Generation sources were the meat distribution net-work including about 170 slaughterhouses, 280 meat-packing plants. thousands of meat shops and restaurants etc. The daily total amount of the animal fat residue is about 700 ton/day. More than 60% of the generation sources were concentrated in Seoul metropolitan area. The residue was collected by about 300 men using old-fashioned devices like handcarts, bike and auto bike, transported to the recycling plants by about 60 collection agencies. The residue was processed to produce by-products such as grease, tallow, animal feed ingredient in the recycling plants. At present, however, a great number of unlicensed, and mostly small rendering processors without having pollution control facilities do the unlawful business. These small, old fashioned and unorganized businesses are creating environmental problems by disposing the waste in improper ways such as open burning and dump. Improvement of the distribution network, the large-scale plants, and the estabilishing proper infrastructures were suggested to overcome the problems for the sound fat residues reprocessing industry.

High-rate Anaerobic Treatment of Landfill Leachate

Shin,Hang-Sik,Lee,Chae Young,Bae,Byung-Uk 嶺南大學校 環境問題硏究所 1994 環境硏究 Vol.14 No.1