Advances in understanding entire process of medium chain carboxylic acid production from organic wastes via chain elongation

Qingyan Wang; Nan Yang; Yajing Cai; Ru Zhang; Yan Wu; Weifang Ma; Chuan Fu; Panyue Zhang; Guangming Zhang

doi:10.1016/j.chemosphere.2023.139723

Advances in understanding entire process of medium chain carboxylic acid production from organic wastes via chain elongation

Chemosphere. 2023 Oct:339:139723. doi: 10.1016/j.chemosphere.2023.139723. Epub 2023 Aug 3.

Authors

Qingyan Wang¹, Nan Yang¹, Yajing Cai¹, Ru Zhang¹, Yan Wu², Weifang Ma¹, Chuan Fu², Panyue Zhang³, Guangming Zhang⁴

Affiliations

¹ Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
² School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing, 404632, China.
³ Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing, 404632, China. Electronic address: panyue_zhang@bjfu.edu.cn.
⁴ School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China. Electronic address: 2020017@hebut.edu.cn.

PMID: 37543231
DOI: 10.1016/j.chemosphere.2023.139723

Abstract

Chain elongation is an environmentally friendly biological technology capable of converting organic wastes into medium chain carboxylic acids (MCCAs). This review aims to offer a comprehensive analysis of MCCA production from organic wastes via chain elongation. Seven kinds of organic wastes are introduced and classified as easily degradable and hardly degradable. Among them, food waste, fruit and vegetable waste are the most potential organic wastes for MCCA production. Combined pretreatment technologies should be encouraged for the pretreatment of hardly degradable organic wastes. Furthermore, the mechanisms during MCCA production are analyzed, and the key influencing factors are evaluated, which affect the MCCA production and chain elongation efficiency indirectly. Extracting MCCA simultaneously is the most important way to improve MCCA production efficiency, and technologies for sequentially extracting different kinds of MCCAs are recommended. Finally, some perspectives for future chain elongation researches are proposed to promote the large-scale application of chain elongation.

Keywords: Anaerobic fermentation; Chain elongation; Mechanisms; Medium chain carboxylic acids; Organic wastes.

Publication types

Review

MeSH terms

Bioreactors
Carboxylic Acids*
Fermentation
Fruit
Refuse Disposal*

Substances

Carboxylic Acids