한국해양대학교

Detailed Information

Metadata Downloads

생물전기화학 혐기성 소화조의 성능에 대한 전극충진율과 다전압인가법의 영향

DC Field Value Language
dc.contributor.advisor 송영채 -
dc.contributor.author 김동현 -
dc.date.accessioned 2019-12-16T02:42:21Z -
dc.date.available 2019-12-16T02:42:21Z -
dc.date.issued 2017 -
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/11383 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002331119 -
dc.description.abstract Bioelectrochemical anaerobic digestion is an advanced technology for stabilizing organic wastes, as well as generating methane gas as a by-product. In bioelectrochemical anaerobic digester, electron, proton and carbon dioxide can be produced from organic matter on anode. Cathode use electron and carbon dioxide for producing methane gas. Currently, there are many researches trying to develop bioelectrochemical technology. But it needs more researches to improve the performance of bioelectrochemical anaerobic digestion. In this research, two types of digesters were operated for electrode packing ratio(EPR) and multi-voltage application. One of the digesters had total 7.2m2/m3 of electrode packing ratio which was gradually reduced from 7.2m2/m3 to 0m2/m3 in 3 stages. Other digester had 6sets of separator and electrode assembly(SEA) and was applied multi-voltage(0.3V, 0.5V, 0.7V) to each SEA according to single, dual and tri voltage. As a result, Reduced electrode packing ratio affected performance of bioelectrochemical anaerobic digester directly. At 7.2m2/m3, specific methane production and methane composition were 561.9mL CH₄/L.d and 69.4%. At 3.6m2/m3, specific methane production and methane composition were 408.2mL CH₄/L.d and 68.1%, but operation of control cannot be maintained by short HRT(10days). State variables in research were stable except for control. At the end of control operation, pH was 6.6. According to reduced EPR, performance of bioelectrochemical was decreased. However, Energy efficiency was 65.3% at 3.6m2/m3 which is the highest value. In this research, we found that performance of bioelectrochemical anaerobic digester is related to bacteria like as deltaproteobacter, which controls direct interspecies electron transfer(DIET) for methane reduction. Deltaproteobacteria was 1.64% at 7.2m2/m3 . It was higher 15-25% than 3.6m2/m3 and control. Multi-voltage application influence the performance rate in a unstable manner. Bioelectrochemical anaerobic digester shows high performance when applied to single voltage which had 654.0mL CH₄/L.d of specific methane production and 71.6% of methane composition. Alkalinity and VFAs concentration were 3,946.6 mg/L as CaCO₃and 746.0mg COD/L. When applied to dual voltage(0.3V, 0.5V), specific methane production and methane composition were decreased to 367.3mL CH₄/L.d, 67.8%. But when applied to tri-voltage, methane composition was increased to 71.3%. This indicates that tri-voltage have more methane reduction reaction than dual-voltage application because of electric potential of 0.7V. When applied to 0.7V, electric potential had proper range from -0.580V to +0.120V(vs. Ag/AgCl) for oxidization and methane reduction on electrode. Multi-voltage application have poor performance but have a possibility for having higher performance when maintained in a proper electric potential. -
dc.description.tableofcontents 제 1 장 서론 1 제 2 장 문헌연구 4 2.1 하수슬러지 4 2.1.1 하수슬러지의 발생현황 4 2.1.2 하수슬러지의 처리현황 6 2.2 혐기성 소화 7 2.2.1 혐기성 소화의 기본원리 7 2.1.2 혐기성 소화에 관여하는 미생물 11 2.1.3 혐기성 소화조에 영향을 주는 인자 12 2.2.4 혐기성 소화의 장단점 15 2.3 생물전기화학 혐기성 소화 16 2.3.1 생물전기화학 혐기성소화의 원리 17 2.3.2 생물전기화학 혐기성소화 연구현황 19 2.2.3 미생물전해전지의 환경인자 21 제 3 장 실험 재료 및 방법 25 3.1 실험 장치 25 3.1.1 생물전기화학 혐기성 소화조 25 3.1.2 전극의 제작과 설치 27 3.2 식종슬러지 및 하수슬러지 29 3.2.1 하수슬러지의 혐기성 생분해도 실험 30 3.3 운전조건 31 3.4 분석과 계산 33 3.4.1 BEAD 반응조 성능 평가 33 3.4.2 BEAD 반응조 에너지효율 평가 34 3.4.3 BEAD 반응조 내부 전극의 전기화학적 성능 평가 35 3.4.4 파이로시퀀싱을 이용한 미생물군집의 분석 35 제 4 장 실험 결과 및 고찰 37 4.1 하수슬러지의 혐기성 생분해도 37 4.1.1 실험결과 37 4.2 전극면적에 따른 BEAD 반응조의 성능 평가 40 4.2.1 초기운전 및 전극 충진율에 따른 메탄발생 40 4.2.2 소화조 상태변수(pH, 알카리도, VFAs) 45 4.2.3 유기물제거 및 메탄수율 50 4.2.4 산화전극 및 환원전극의 전기화학특성 평가 54 4.2.5 전극전위 및 에너지효율 56 4.2.6 미생물 분석 57 4.3 다전압인가 방법에 따른 BEAD 반응조의 성능 연구 63 4.3.1 비메탄발생율 및 바이오가스의 메탄함량 63 4.3.2 생물전기화학 혐기성 소화조의 상태변수(pH, 알카리도, VFAs) 67 4.3.3 유기물제거 및 메탄수율 72 4.3.4 산화전극 및 환원전극의 전기화학특성의 평가 76 4.3.5 에너지 효율 및 전극전위 79 4.3.6 부유 혐기성미생물의 군집분석 82 제 5 장 결론 87 참고문헌 90 -
dc.format.extent 109 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 생물전기화학 혐기성 소화조의 성능에 대한 전극충진율과 다전압인가법의 영향 -
dc.type Dissertation -
dc.date.awarded 2017-02 -
dc.contributor.alternativeName Kim, Dong Hyun -
dc.contributor.department 대학원 토목환경공학과 -
dc.contributor.affiliation 한국해양대학교 대학원 -
dc.description.degree Master -
dc.subject.keyword 미생물연료전지, 생물전기화학적 혐기성소화, 전극충진율, 다전압 인가방법, 하수슬러지 -
dc.type.local Text -
dc.title.translated Influence of electrode packing ratio and multi-voltage application on bioelectrochemical anaerobic digestion of sewage sludge -
dc.contributor.specialty 환경공학과 -
dc.identifier.holdings 000000001979▲000000006780▲000002331119▲ -
Appears in Collections:
토목환경공학과 > Thesis
Files in This Item:
생물전기화학 혐기성 소화조의 성능에 대한 전극충진율과 다전압인가법의 영향.pdf Download

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse