http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
황재훈(Hwang, Jae-Hoon),최정아(Choi, Jeong-A),전병훈(Jeon, Byong-Hun) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
The effects of various organic wastes on anaerobic fermentative hydrogen production were studied using enriched mixed microflora in batch tests. Rotten fruit, corn powder and organic wastewater enriched with sulfate (up to 1,000 mg/L) were used for experiments. Maximum hydrogen production (547.1 mL) was observed from rotten apple with initial substrate concentration of 132.2 g COD/L. The experimental result on sulfate enriched organic wastewater indicated that hydrogen production is not adversely influenced by relatively high sulfate concentration. Residual sulfate content remained at 96-98 % after 75 hours of reaction, which showed that no major sulfate reduction was occurred at pH 5.3-5.5 in the reactor. The volatile fatty acid (VFA) fractions produced during the reaction was in the order of butyrate > acetate > propionate in all experiments. The results of this study would be useful for controlling the conditions on fermentative hydrogen production using different feedstocks.
혐기 혼합균주에서 황산염 농도변화에 따른 수소 발효 특성
황재훈(Jae Hoon Hwang),최정아(Jeong A Choi),이종학(Jong Hak Lee),정태영(Tae Young Jeong),차기철(Gi Cheol Cha),송호철(Ho Cheol Song),용보영(Bo Young Yong),김동진(Dong Jin Kim),전병훈(Byong Hun Jeon) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.6
황산염의 농도변화에 따른 연속 혐기성 수소 발효에 미치는 영향을 고찰하기 위해서 혼합균주를 사용한 완전 혼합형 반응조를 운전하였다. 기질은 글루코오스를 사용하였고, 수리학적 체류시간은 1, 0.5, 0.25 일로 각각 고정하였다. 황산염 농도는 0~20,000 mg/L로 단계별 증가시켰고 pH 5.5로 운전하였다. 실험 결과 높은 황산염 농도에 관계없이 수소가 발생하였고, HRT 0.25일로 짧아짐에 따라 수소 발생이 높게 나타났다. HRT 1, 0.5, 0.25일 각 조건별 수소 생성량과 수소 수율은 2.9, 4.6, 9.4 L/day, 2.0, 1.8, 1.6 mol H₂/mol glucose로 나타났으며, 잔존 황산염 96~98, 95~97, 94~97%로 나타나 황산염 환원이 발생하지 않았다. FISH 결과 모든 조건에서 수소생성균의 분포는 나타났지만 황산염환원균의 분포는 나타나지 않았다. The effect of varying sulfate concentration on continuous fermentative hydrogen production was studied using enriched mixed microflora in continuously fed reactor. Glucose was used as a model substrate for carbohydrates, and hydraulic retention time (HRT) was maintained at 1, 0.5, 0.25 day, respectively. Sulfate concentration was 0~20,000 mg/L and the operating pH was maintained at 5.5. The experimental results indicate that hydrogen production is not affected by high sulfate concentration and shorter HRT of 0.25 day enhance hydrogen production. At HRT 1, 0.5, 0.25 day, the hydrogen production rate and hydrogen yield were 2.6, 4.6, 9.4 L/day, and 2.0, 1.8, 1.6 mol H₂/mol glucose, respectively. Residual sulfate content was 96~98, 95~97, and 94~97% at HRT 1, 0.5, 0.25 day which show that no sulfate reduction occurred in the reactor during the experiments. Results of Fluorescence In Situ Hybridization (FISH) may indicate the presence of HPB (hydrogen producing bacteria) under all experimental conditions. However, SRB (sulfate reducing bacteria) were not found.
황재훈(Hwang, Jae-Hoon),최정아(Choi, Jeong-A),전병훈(Jeon, Byong-Hun) 한국신재생에너지학회 2009 신재생에너지 Vol.5 No.4
The effects of various organic wastes on anaerobic fermentative hydrogen production were studied using enriched mixed microflora in batch tests. Rotten fruit, corn powder and organic wastewater enriched with sulfate (up to 1,000 mg/L) were used for experiments. Maximum hydrogen production (547.1 mL) was observed from rotten apple with initial substrate concentration of 132.2 g COD/L. The experimental result on sulfate enriched organic wastewater indicated that hydrogen production is not adversely influenced by relatively high sulfate concentration. Residual sulfate content remained at 96-98 % after 75 hours of reaction, which showed that no major sulfate reduction was occurred at pH 5.3-5.5 in the reactor. The volatile fatty acid (VFA) fractions produced during the reaction was in the order of butyrate > acetate > propionate in all experiments. The results of this study would be useful for controlling the conditions on fermentative hydrogen production using different feedstocks.
고정식 담체 유무와 반송비에 따른 소규모 하수처리 시스템 내 영양염류 제거 특성
황재훈(Jae Hoon Hwang),조동완(Dong Wan Cho),김충환(Chung Hwan Kim),전병훈(Byong Hun Jeon) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.6
소규모 하수처리시스템에 다양한 반송비와 고정식 담체를 적용하여 합성폐수에서 질소, 인의 제거를 검토하였다. 담체를 첨가 시 질소의 제거율은 40.1%에서 65.1%로 증가하였으나 COD와 인의 제거에는 영향이 없었다(<5%). 반송을 통해 유량을 2배(2Q)로 증가시킨 경우 질소의 제거율은 7% 정도가 증가하였으나, 인 제거율은 반송비가 증가됨에 따라 31.8에서 26.6%로 감소하였다. 무산소조에서 담체에 부착된 미생물은 약 73.4 mg/cm2로 존재하였으며, FISH분석 결과 탈질 미생물인 Pseudomonas aeruginosa 존재 (약 58%)를 확인하였다. The effect of recycling ratio and fixed media on nitrate and phosphate removal was investigated in a pilot-scale wastewater treatment unit using synthetic wastewater. Addition of fixed media increased nitrate removal from 45 to 58% while no noticeable change was observed for Chemical Oxygen Demand (COD) and phosphate removal (<5%). Nitrate removal efficiency also enhanced (Ca 7%) when the influent wastewater flow was doubled (2Q), however phosphate removal was decreased from 40.9 to 26.6% with the increasing recycling rate. The attached biomass analysis showed the presence of bacteria (73.4 mg/cm2) on the surface of added media in anoxic reactor. Pseudomonas aeruginosa a common denitrifying bacterium dominated the bacterial growth (58%) in the anoxic reactor which was determined using Fluorescence In Situ Hybridization (FISH) analysis.
신균주 Rhodococcus sp. YSPW01과 YSPW02를 이용한 수중 내 고농도 Perchlorate 환원 특성 연구
이상훈(Sang Hoon Lee),황재훈(Jae Hoon Hwang),Kabra Akhil,이대성(Dae Sung Lee),전병훈(Byong Hun Jeon) 大韓環境工學會 2014 대한환경공학회지 Vol.36 No.5
수중 내 함유된 고농도 perchlorate의 환원가능성을 perchlorate 환원 미생물인 신균주 Rhodococcus sp. YSPW01과YSPW02로 검토하였다. Perchlorate 환원 미생물은 혐기소화조 슬러지에서 분리 배양하였으며, perchlorate 환원능을 검토하기위해 전자공여체인 acetate를 사용하였다. YSPW01과 YSPW02는 perchlorate 82 mg L-1와 acetate 550 mg L-1에서 회분식 실험을 수행하였을 때, 반응 26시간과 9시간 후 각각 정상상태에 도달하였다. 이 때 perchlorate 환원은 8, 7시간 이내에 초기농도82 mg L-1에서 검출한계 이하(10 μg L-1)까지 제거되었다. 반응조 내에 acetate:perchlorate (w:w)비를 1:1에서 5:1로 증가한결과, perchlorate의 제거 속도는 YSPW01과 YSPW02 모두 2.1, 3.2 mg L-1 h-1에서 15, 15.5 mg L-1 h-1로 약 4.5배 증가하였고,최종 perchlorate는 검출한계 이하까지 제거되었다. 본 연구결과, Rhodococcus sp. YSPW01 및 YSPW02는 고농도 perchlorate제거에 적합하며, 신균주를 고농도 perchlorate 제거를 위한 생물학적 처리공정에 응용가능 할 것으로 판단된다. The feasibility of perchlorate reducing-bacteria isolated from the sludge of an anaerobic digester was determined usingammonium perchlorate in aqueous medium. Growth kinetics of the two perchlorate reducing bacteria including Rhodococcus sp. YSPW01 and YSPW02 were investigated using acetate as the electron donor in batch experiment. The growth of YSPW01 andYSPW02 reached a steady-state at 26 and 9 h, respectively. The initial perchlorate concentration was completely reduced within8 and 7 h by YSPW01 and YSPW02, respectively. The reduction rates were 2.1 and 15 mg L-1 h-1 for YSPW01, and 3.2 and 15.5mg L-1 h-1 for YSPW02, at 1:1 and 5:1 ratios of acetate:perchlorate (w:w), respectively. In this study, the bacteria Rhodococcussp. YSPW01 and YSPW02 demonstrated a potential for the perchlorate reduction, which could be further investigated for developmentof an efficient strategy to treat the perchlorate contaminated waters.