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은나노 활성탄에 의한 하수 2차 처리수 중의 오염물질 제거 특성에 관 한 연구
선용호(Yong-Ho Seon) 한국생물공학회 2014 KSBB Journal Vol.29 No.5
This study targets the pollutant removal of secondary effluent from final clarifiers in wastewater treatment plant using silver nanoparticles on activated carbon. The removal efficiency and treatment characteristics of pollutant are anlayzed by perfoming experiments using granular activated carbon with silver nanoparticles and ordinary granular activated carbon. The specific surface area of granular activated carbon with silver nanoparticles is smaller than that of ordinary granular activated carbon. However, the removal efficiency of CODMn, T-N and T-P in experiments using activated carbon with silver nanoparticles are higher than that in experiment using ordinary granular activated carbon. That means the case of activated carbon with silver nanoparticles is much better at treatment activity. In addition, activated carbon with silver nanoparticles has antimicrobial activity because there is no microbe on the surface of it after experiments.
표면개질 담체를 이용한 충전탑 반응기에서 유기물 제거 및 미생물 부착 특성
선용호(Yong-Ho Seon) 한국생물공학회 2012 KSBB Journal Vol.27 No.3
This study was accomplished using packed bed column reactors that contain nonsurface-modified polypropylene media and surface-modified media from hydrophobic surface property into hydrophilic property by ion beam irradiation. The objectives of this research was investigated the characteristics of organic compounds removal and microbe attachment from sewage of school cafeteria in these reactors. In 736.8 mg/L of the average inflow CODCr concentration the reactors with and without surface modification showed 81.8% and 70.3% of average CODCr removal efficiencies, respectively, which proves the CODCr removal efficiency of surface-modified media reactor is higher than that of nonsurface-modified media reactor. After 90 days, there were maximum differences between modified system and nonmodified system. In that time the maximum removal efficiency of CODCr was 96.5% in modified system and was 85.2% in non-modified system that showed removal efficiency of surface-modified media system is 11.3% higher than that of nonsurface-modified media system. The average removal efficiency of SS was 80.4% for the surface modified system and 61.6% for the non-modified system under same condition. Also, the reactor of surface-modified media has advantage on microbe attachment and biofilm formation.
은나노 모래를 이용한 모래여과에서 유기물질 제거 및 소독 효과에 관한 연구
선용호(Yong-Ho Seon) 한국생물공학회 2012 KSBB Journal Vol.27 No.1
In this study, novel nano silver sand filtration method was compared with UV treatment and normal sand filtration method through filtering treated water from sewage treatment plant. As a result, BOD? removal rate of nano silver sand filtration showed higher approximately 31% and 23%, comparing with UV treatment and sand filtration. Moreover, KMnO₄ removal rate of nano silver sand was about 6.6 and 2.8 times higher than other two methods. In addition, it showed better for removing SS and total coliform, comparing with others. Also, there is no bacteria on nano silver sand after experiments. Therefore, nano silver sand filtration will be effective for advanced water treatment.
원주시 아파트 및 학교 오수정화시설의 처리현황에 관한 연구
선용호(Yong-Ho Seon) 상지대학교 환경과학기술연구소 1996 환경과학연구 Vol.2 No.1
폐수중 생활하수량은 66.3%를 차지하며 생활하수의 현장처리시설인 오수정화시설에서의 오염불 감소는 수질환경개선을 위하여 필수적이다. 이에 생활하수 배출시설 중 인구밀집지역으로 주오염원인 아파트와 공공시설인 학교의 오수정화시설을 선정하여 오수정화시설의 처리효율을 알아보고자 하였다. 실험은 Standard Method와 수질오염공정시험법에 준하여 10개 항목을 실시하였으며 실험결과는 각 대상건물의 오수정화시설 처리방식 및 관리 정도에 따라 처리효율에 차이를 보였다. 또한 상지전문대는 오수정화시설의 방류수 수질기준 (기준 : BOD 40 ppm)을 만족시킨 반면 아파트는 모두 기준을 초과하였으며, 이의 해결을 위해서는 미생물과 오수와의 효율적인 혼합을 위해 분산식 산기관과 폭기량의 증가가 필요할 것으로 생각된다. 더불어 폭기조의 균을 고농도로 유지하기 위한 균의 고정화가 필요할 것으로 사료된다. Domestic wastewater has been reported to be 66.3% of the total wastewater generated. Therefore, pollution reduction in sewage treatment plants installed in discharging points for the treatment of domestic wastewater is necessary to improve surface water quality. We carried out a performance test for sewage treatment systems in apartments and school which are, due to large population, major sewage sources among others. EPA Standard Method and Korea Standard Method were used for analyses of 10 items in our experiment. The results varied with different modes of treatment as well as various management systems in the buildings tested. Sewage treatment system in Sang Ji College satisfied removal limits (<BOD 40 ppm) while failed in apartments. To solve this, we suggest an ejection mode of aerator which induces effective mixing of microorganisms with sewage as well as more oxygen supply. In addition, immobilization of microorganisms in aeration reactor is supposed to be necessary to maintain microorganism population enough for reduction of pollution to satisfied levels.