Enhanced ethanol-driven carboxylate chain elongation by Pt@C in simulated sequencing batch reactors: Process and mechanism

Publikationstyp
Journal Article
Date Issued
2023-09
Sprache
English
Author(s)
Huo, Weizhong
Ye, Rong  
Shao, Yuchao  
Bao, Menggang
Stegmann, Rainer  
Circular Resource Engineering and Management V-11  
Lu, Wenjing  
TORE-URI
https://hdl.handle.net/11420/42460
Journal
Bioresource technology  
Volume
384
Article Number
129310
Citation
Bioresource Technology 384: 129310 (2023-09)
Publisher DOI
10.1016/j.biortech.2023.129310
Scopus ID
2-s2.0-85163778413
PubMed ID
37315622
Publisher
Elsevier
Carboxylate chain elongation can create value-added bioproducts from the organic waste. The effects of Pt@C on chain elongation and associated mechanisms were investigated in simulated sequencing batch reactors. 5.0 g/L of Pt@C greatly increased the synthesis of caproate, with an average yield of 21.5 g COD/L, which was 207.4% higher than the trial without Pt@C. Integrated metagenomic and metaproteomic analyses were used to reveal the mechanism of Pt@C-enhanced chain elongation. Pt@C enriched chain elongators by increasing the relative abundance of dominant species by 115.5%. The expression of functional genes related to chain elongation was promoted in the Pt@C trial. This study also demonstrates that Pt@C may promote overall chain elongation metabolism by enhancing CO2 uptake of Clostridium kluyveri. The study provides insights into the fundamental mechanisms of how chain elongation can perform CO2 metabolism and how it can be enhanced by Pt@C to upgrade bioproducts from organic waste streams.
Subjects
Caproate
CO metabolism 2
Metagenomics
Metaproteomics
DDC Class
624: Civil Engineering, Environmental Engineering