Iron oxide facilitated methane production process has recently attracted more and more attention in the worldwide. On the other hand, soluble microbial products (SMPs) was found to play an important role in the wastewater treatment systems. The purpose of this study was to investigate the role of SMPs in the goethite (a typical iron oxide mineral) facilitated methanogenic process, where a dialysis bag was used to enrich the SMPs in the aqueous system. Results showed that both methane yield and production rate were enhanced significantly using the dialysis bag with a molecular weight of 2000 Da compared to the controlled goethite-dosed reactors. Chemical analysis indicated that the increase in contacting time between goethite and microorganisms had insignificant impact on SMPs formation and methane production. It was also found that SMPs especially Flavins secreted from microorganisms could play an important role in the goethite facilitated methane production process. Additionally, enrichment of SMPs not only improved the abundance of electroactive bacteria and but also promoted the growth of aceticlastic methanogenesis. (C) 2016 Elsevier Ltd. All rights reserved.
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Gwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USAGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Jiang, Shenghua
Park, Sunhwa
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Gwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South KoreaGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Park, Sunhwa
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Yoon, Younggun
Lee, Ji-Hoon
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Korea Inst Geosci & Mineral Resources, Taejon 305350, South KoreaGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Lee, Ji-Hoon
Wu, Wei-Min
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Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USAGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Wu, Wei-Min
Nguyen Phuoc Dan
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Ho Chi Minh City Univ Technol, Fac Environm, Ho Chi Minh City, VietnamGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Nguyen Phuoc Dan
Sadowsky, Michael J.
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Univ Minnesota, BioTechnol Inst, St Paul, MN 55108 USA
Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USAGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Sadowsky, Michael J.
Hur, Hor-Gil
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Gwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South KoreaGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
机构:
Gwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USAGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Jiang, Shenghua
Park, Sunhwa
论文数: 0引用数: 0
h-index: 0
机构:
Gwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South KoreaGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Park, Sunhwa
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机构:
Yoon, Younggun
Lee, Ji-Hoon
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Geosci & Mineral Resources, Taejon 305350, South KoreaGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Lee, Ji-Hoon
Wu, Wei-Min
论文数: 0引用数: 0
h-index: 0
机构:
Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USAGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Wu, Wei-Min
Nguyen Phuoc Dan
论文数: 0引用数: 0
h-index: 0
机构:
Ho Chi Minh City Univ Technol, Fac Environm, Ho Chi Minh City, VietnamGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Nguyen Phuoc Dan
Sadowsky, Michael J.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Minnesota, BioTechnol Inst, St Paul, MN 55108 USA
Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USAGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea
Sadowsky, Michael J.
Hur, Hor-Gil
论文数: 0引用数: 0
h-index: 0
机构:
Gwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South KoreaGwangju Inst Sci & Technol, Sch Environm Sci & Engn, Kwangju 500712, South Korea