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[1]王薪淯,朱晓宇,李海翔,等.[综 述] 乳酸碳链延长技术及其在有机废弃物资源化中的应用研究进展[J].应用与环境生物学报,2020,26(04):827-835.
 WANG Xinyu,ZHU Xiaoyu?,et al.The biotechnology of lactate chain elongation and its current advances in n-caproate production from organic waste streams[J].Chinese Journal of Applied & Environmental Biology,2020,26(04):827-835.
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[综 述] 乳酸碳链延长技术及其在有机废弃物资源化中的应用研究进展()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年04期
页码:
827-835
栏目:
工业与环境微生物功能研究专栏
出版日期:
2020-08-25

文章信息/Info

Title:
The biotechnology of lactate chain elongation and its current advances in n-caproate production from organic waste streams
作者:
王薪淯朱晓宇李海翔魏永奉鑫任冰何勇
1桂林理工大学环境科学与工程学院,广西环境污染控制理论与技术重点实验室 桂林 541004
2中国科学院成都生物研究所,中国科学院环境与应用微生物重点实验室&四川省环境微生物重点实验室 成都 610041
3常州大学环境与安全工程学院 常州 213164
Author(s):
WANG Xinyu1 2 ZHU Xiaoyu2? LI Haixiang1? WEI Yong3 FENG Xin2 REN Bing2 3 & HE Yong2 3
1 Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China 2 Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences & Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu 610041, China 3 School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
关键词:
碳链延长乳酸己酸有机废弃物瘤胃球菌科反应器微生物
Keywords:
chain elongation lactic acid n-caproate organic waste Ruminococcaceae reactor microbiome
摘要:
资源化利用是有机废弃物处理处置的重要方向,降低成本和提高产物的附加值是推动有机废弃物资源化利用的重要引擎,也是巨大挑战. 近年来,在该领域发展出了一种基于羧酸平台的乳酸合成己酸的碳链延长新技术. 本文首先介绍了乳酸碳链延长技术的代谢机制以及相关功能微生物. 该技术的核心是利用乳酸作为电子供体,在特定微生物(如埃氏巨型球菌Megasphaera elsdenii、瘤胃球菌Ruminococcaceae strain CBP6以及反应器混合微生物)的作用下,将乙酸等短链脂肪酸经碳链延长过程转化为含有6个碳原子的中链脂肪酸己酸. 然后详细介绍了该技术在富含乳酸的废弃物中的应用研究进展. 在有机质含量比较高的废弃物如餐厨垃圾、乳清废水、酿酒废水中均存在高浓度的乳酸,这一类废弃物具有最终资源化为己酸的潜力. 进一步分析了影响该技术效能的关键因子,包括环境pH、温度以及电子供体和受体. 最后总结了乳酸碳链延长技术相对于传统废弃物资源化处理技术的优、劣势. 乳酸碳链延长技术在有机废弃物的资源化处理领域已表现出巨大的应用潜力,未来需要进一步提高己酸产物效价和降低分离提纯成本. (图2 表3 参66)
Abstract:
The demand for biochemical energy and biofuels will continue to grow alongside the increasing costs for treating waste biomass. Thus, reducing costs and enhancing product value are not only key drivers for resource recovery development from waste biomass but also big challenges. Elongating carboxylates to medium-chains using lactate as an electron donor is a novel biotechnological approach. Driven by lactate, functional bacteria (e.g. Megasphaera elsdenii, Ruminococcaceae strain CBP6 and mix-culture microbiomes) elongate the short-chain carboxylates (e.g. acetate) into the medium-chain carboxylate, n-caproate. In this work, we determined the metabolic pathway of lactate chain elongation and listed the relevant functional bacteria. Thereafter, we reviewed the development of the lactate chain elongation technology in the context of converting organic waste streams into n-caproate, while summarizing both the advantages and the challenges of this technology. Given that organic waste streams (e.g. food waste, acid whey and liquor wastewater) usually contain a large amount of carbohydrates that can be fermented into lactate, this biotechnological approach could provide a promising opportunity for converting the energy embedded in the organic waste steams into n-Caproic acid without an electron donor (i.e. carbon source). We further analyzed the key factors affecting the performance of the technology, including pH, temperature as well as electron donors and acceptors. Hence, our proposed technology includes the dual benefit of low cost and high value in terms of its bioproducts, which would greatly improve production efficiency and sustainability.

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更新日期/Last Update: 2020-08-25