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Microorganisms
Volume 12
Issue 4
10.3390/microorganisms12040680
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Review

Research on the Resource Recovery of Medium-Chain Fatty Acids from Municipal Sludge: Current State and Future Prospects

by
Yuhao Liu
*,
Yacong Duan
,
Long Chen
,
Ziyan Yang
,
Xiaoli Yang
,
Shuli Liu
and
Gangfu Song
School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
*
Author to whom correspondence should be addressed.
Microorganisms 2024, 12(4), 680; https://doi.org/10.3390/microorganisms12040680
Submission received: 18 February 2024 / Revised: 26 March 2024 / Accepted: 27 March 2024 / Published: 28 March 2024
(This article belongs to the Special Issue Biological Treatment of Solidwaste)
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Abstract

The production of municipal sludge is steadily increasing in line with the production of sewage. A wealth of organic contaminants, including nutrients and energy, are present in municipal sludge. Anaerobic fermentation can be used to extract useful resources from sludge, producing hydrogen, methane, short-chain fatty acids, and, via further chain elongation, medium-chain fatty acids. By comparing the economic and use values of these retrieved resources, it is concluded that a high-value resource transformation of municipal sludge can be achieved via the production of medium-chain fatty acids using anaerobic fermentation, which is a hotspot for future research. In this study, the selection of the pretreatment method, the method of producing medium-chain fatty acids, the influence of the electron donor, and the technique used to enhance product synthesis in the anaerobic fermentation process are introduced in detail. The study outlines potential future research directions for medium-chain fatty acid production using municipal sludge. These acids could serve as a starting point for investigating other uses for municipal sludge.
Keywords: municipal sludge; anaerobic fermentation; medium-chain fatty acids; hydrogen production; methane production municipal sludge; anaerobic fermentation; medium-chain fatty acids; hydrogen production; methane production

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MDPI and ACS Style

Liu, Y.; Duan, Y.; Chen, L.; Yang, Z.; Yang, X.; Liu, S.; Song, G. Research on the Resource Recovery of Medium-Chain Fatty Acids from Municipal Sludge: Current State and Future Prospects. Microorganisms 2024, 12, 680. https://doi.org/10.3390/microorganisms12040680

AMA Style

Liu Y, Duan Y, Chen L, Yang Z, Yang X, Liu S, Song G. Research on the Resource Recovery of Medium-Chain Fatty Acids from Municipal Sludge: Current State and Future Prospects. Microorganisms. 2024; 12(4):680. https://doi.org/10.3390/microorganisms12040680

Chicago/Turabian Style

Liu, Yuhao, Yacong Duan, Long Chen, Ziyan Yang, Xiaoli Yang, Shuli Liu, and Gangfu Song. 2024. "Research on the Resource Recovery of Medium-Chain Fatty Acids from Municipal Sludge: Current State and Future Prospects" Microorganisms 12, no. 4: 680. https://doi.org/10.3390/microorganisms12040680

APA Style

Liu, Y., Duan, Y., Chen, L., Yang, Z., Yang, X., Liu, S., & Song, G. (2024). Research on the Resource Recovery of Medium-Chain Fatty Acids from Municipal Sludge: Current State and Future Prospects. Microorganisms, 12(4), 680. https://doi.org/10.3390/microorganisms12040680

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