中文 | English

J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Homoacetogenesis enhanced by low-temperature under aerobic conditions

Download Full Text

低温强化有氧条件下二氧化碳同型产乙酸研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jun.2025, Vol.48 No.6: 721-726, 749

DOI: 10.3969/j.issn.1003-5060.2025.06.001

Authors

WANG Yuwei, WANG Wei, LI Yongcun, HE Jianghao

(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: Homoacetogenesis is an important pathway for $ CO_{2} $ bio-utilization, but the process is interfered by $ O_{2} $. This study investigated the effects of different temperatures on the efficiency of homoacetogenesis, methanogenic and acetic acid-producing activities, INT-ETS and coenzyme $ F_{420} $ activities, and the microbiological community structure under anaerobic and aerobic conditions. The results showed that no HAc was produced under aerobic conditions at $ 35\;^{\circ}C $, but at $ 15\;^{\circ}C $, the cumulative HAc production of homoacetogenesis was $ (174.8\pm0.4)\;\mathrm{mg/g} $ under aerobic conditions; on the contrary, the cumulative $ CH_{4} $ production decreased by 82.0%, from $ (198.1\pm9.7)\;\mathrm{mL/g} $ at $ 35\;^{\circ}C $ to $ (35.6\pm9.3)\;\mathrm{mL/g} $ at $ 15\;^{\circ}C $. Low-temperature conditions not only inhibited the activities of INT-ETS and coenzyme $ F_{420} $, but also enriched the typical homoacetogens Acetobacterium. Therefore, the low-temperature control during homoacetogenesis under aerobic conditions not only helped to inhibit the methanogenesis, but also increased the cumulative yield of HAc.

Keywords: homoacetogenesis; carbon dioxide; acetic acid; methane; hydrogenotrophic methanogen

作者信息

王昱伟，王伟，李永存，何江浩

（合肥工业大学土木与水利工程学院，安徽合肥230009）

摘要和关键词

摘要: 同型产乙酸是 $ CO_{2} $ 生物利用的重要途径，但该过程会受到 $ O_{2} $ 组分的干扰。文章探讨不同温度对无氧条件和有氧条件下 $ CO_{2} $ 同型产乙酸效率、污泥产甲烷和产乙酸活性、电子传递活性和辅酶 $ F_{420} $ 活性及其微生物群落结构的影响。结果表明：在 $ 35^{\circ}C $ 有氧条件下未产生乙酸，但在 $ 15^{\circ}C $ 有氧条件下，同型产乙酸的累积乙酸产量为 $ (174.8 \pm 0.4) $ mg/g；相反，在 $ 15^{\circ}C $ 有氧条件下累积甲烷产量下降了 82.0%，由 $ 35^{\circ}C $ 的 $ (198.1 \pm 9.7) $ mL/g 下降为 $ 15^{\circ}C $ 的 $ (35.6 \pm 9.3) $ mL/g。低温条件不仅能抑制电子传递活性和辅酶 $ F_{420} $ 的活性，而且可以富集同型产乙酸菌 Acetobacterium。因此，在有氧条件下二氧化碳同型产乙酸过程中，控制低温不仅有助于抑制甲烷生成，而且能够提高乙酸累积产量。

关键词: 同型产乙酸；二氧化碳；乙酸；甲烷；嗜氢产甲烷菌

Funding

基金项目：国家重点研发计划资助项目（2019YFC0408502）；国家自然科学基金区域创新发展联合基金资助项目（U19A20108）

Next

Back to Contents