Upgrading lignocellulosic ethanol for caproate production via chain elongation fermentation
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作者:
Yang, Peixian
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R China
Yang, Peixian
[1
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Leng, Ling
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R China
Leng, Ling
[1
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Tan, Giin-Yu Amy
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R China
Tan, Giin-Yu Amy
[1
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Dong, Chengyu
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R China
Dong, Chengyu
[1
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Leu, Shao-Yuan
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R China
Leu, Shao-Yuan
[1
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Chen, Wen-Hsing
[2
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Lee, Po-Heng
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R China
Lee, Po-Heng
[1
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机构:
[1] Hong Kong Polytech Univ, Dept Civil & Environm Engn, ZS919,9-F,South Tower,Block Z, Kowloon, Hong Kong, Peoples R China
[2] Natl Ilan Univ, Dept Environm Engn, Yilan 260, Taiwan
Chain elongation is a promising mixed culture bioprocess to convert acetate into medium chain carboxylates with ethanol as an electron donor. Caproate production using lignocellulosic ethanol (LE) as feedstock via chain elongation fermentation was examined in this study. Meanwhile, the effects of yeast extract and cellulose containing in the LE were investigated separately. Fermentation performance showed that the lag phase of caproate production were shortened in experimental group LE (4 days), yeast extract (6 days), and cellulose (9 days) compared with the control group (17 days) without extra supplement. The insufficiency of electron donor, ethanol, limited further elongation into caproate, resulting in comparable caproate yields and carbon conversion ratios in four experimental groups. Microbial community and microbial kinetics analysis revealed that yeast extract could be metabolized by protein-utilizing bacteria into short chain carboxylates (SCCs), which facilitated biological chain elongation. Meanwhile, yeast extract boosted microbial growth by serving as nitrogen and other nutrient sources. Furthermore, cellulose was utilized and further converted into SCCs, or even caproate, by cellulolytic bacteria. Together, caproate production was enhanced with high microbial activities and intermediates formation using LE. This study upgrades LE into a higher energy density product, caproate, via the energy-efficient chain elongation fermentation.
机构:
Tongji Univ, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
Tongji Univ, Inst Waste Treatment & Reclamat, Shanghai 200092, Peoples R ChinaTongji Univ, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
Liu, Yuhao
He, Pinjing
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Tongji Univ, Inst Waste Treatment & Reclamat, Shanghai 200092, Peoples R China
Minist Housing & Urban Rural Dev PR China MOHURD, Ctr Technol Res & Training Household Waste Small, Shanghai, Peoples R ChinaTongji Univ, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
He, Pinjing
Shao, Liming
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Minist Housing & Urban Rural Dev PR China MOHURD, Ctr Technol Res & Training Household Waste Small, Shanghai, Peoples R ChinaTongji Univ, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
Shao, Liming
Zhang, Hua
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Tongji Univ, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
Tongji Univ, Inst Waste Treatment & Reclamat, Shanghai 200092, Peoples R ChinaTongji Univ, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
机构:
China Univ Min & Technol, Sch Environm & Spatial Informat, Xuzhou 221116, Peoples R China
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Kowloon, Peoples R ChinaChina Univ Min & Technol, Sch Environm & Spatial Informat, Xuzhou 221116, Peoples R China
Yang, Peixian
Leng, Ling
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机构:
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Kowloon, Peoples R ChinaChina Univ Min & Technol, Sch Environm & Spatial Informat, Xuzhou 221116, Peoples R China
Leng, Ling
Zhuang, Huichuan
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机构:
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Kowloon, Peoples R ChinaChina Univ Min & Technol, Sch Environm & Spatial Informat, Xuzhou 221116, Peoples R China
Zhuang, Huichuan
Lee, Po-Heng
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Kowloon, Peoples R China
Imperial Coll London, Dept Civil & Environm Engn, Imperial Coll Rd, London SW7 2BU, EnglandChina Univ Min & Technol, Sch Environm & Spatial Informat, Xuzhou 221116, Peoples R China