Enhancement of short-chain fatty acids production from microalgae by potassium ferrate addition: Feasibility, mechanisms and implications.

Wang, Y; Liu, X; Liu, Y; Wang, D; Xu, Q; Li, X; Yang, Q; Wang, Q; Ni, B-J; Chen, H

Enhancement of short-chain fatty acids production from microalgae by potassium ferrate addition: Feasibility, mechanisms and implications.

Wang, Y Liu, X Liu, Y

Wang, D Xu, Q Li, X Yang, Q Wang, Q

Ni, B-J Chen, H

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Bioresource technology, 2020, 318, pp. 124266
Issue Date:: 2020-12

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Field	Value	Language
dc.contributor.author	Wang, Y
dc.contributor.author	Liu, X
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961
dc.contributor.author	Wang, D
dc.contributor.author	Xu, Q
dc.contributor.author	Li, X
dc.contributor.author	Yang, Q
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.contributor.author	Ni, B-J
dc.contributor.author	Chen, H
dc.date.accessioned	2020-12-29T01:47:22Z
dc.date.available	2020-10-10
dc.date.available	2020-12-29T01:47:22Z
dc.date.issued	2020-12
dc.identifier.citation	Bioresource technology, 2020, 318, pp. 124266
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/144984
dc.description.abstract	Anaerobic fermentation of microalgae was always hindered by its rigid cell wall structure. This paper reports a novel technique, i.e., adding potassium ferrate (K2FeO4) into microalgae fermentation systems to enhance short-chain fatty acids (SCFAs) production. The results showed that the maximum SCFAs production and acetic acid proportion were 732.6 mg COD/g VS and 54.6% at a dosage of 112.8 mg Fe(VI)/g VS, which were 168% and 208% of those in the control, respectively. Mechanism studies revealed that K2FeO4 effectively destroyed surface morphology and cell structure, and thus facilitated microalgae solubilization, providing a large number of biodegradable substrates for subsequent SCFA production. Although K2FeO4 inhibited all the microbial activities relevant to hydrolysis, acidification and methanogenesis processes to some degree, its inhibition to methanogens was much severer than that to other microbes. Illumina MiSeq sequencing analyses revealed that K2FeO4 addition increased the relative abundance (from 9.45% to 50.4%) of hydrolytic and SCFAs-forming bacteria.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier BV
dc.relation.ispartof	Bioresource technology
dc.relation.isbasedon	10.1016/j.biortech.2020.124266
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Iron Compounds
dc.subject.mesh	Potassium Compounds
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Feasibility Studies
dc.subject.mesh	Sewage
dc.subject.mesh	Fermentation
dc.subject.mesh	Microalgae
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Feasibility Studies
dc.subject.mesh	Fermentation
dc.subject.mesh	Iron Compounds
dc.subject.mesh	Microalgae
dc.subject.mesh	Potassium Compounds
dc.subject.mesh	Sewage
dc.title	Enhancement of short-chain fatty acids production from microalgae by potassium ferrate addition: Feasibility, mechanisms and implications.
dc.type	Journal Article
utslib.citation.volume	318
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2020-12-29T01:47:00Z
pubs.publication-status	Published
pubs.volume	318

Abstract:

Anaerobic fermentation of microalgae was always hindered by its rigid cell wall structure. This paper reports a novel technique, i.e., adding potassium ferrate (K2FeO4) into microalgae fermentation systems to enhance short-chain fatty acids (SCFAs) production. The results showed that the maximum SCFAs production and acetic acid proportion were 732.6 mg COD/g VS and 54.6% at a dosage of 112.8 mg Fe(VI)/g VS, which were 168% and 208% of those in the control, respectively. Mechanism studies revealed that K2FeO4 effectively destroyed surface morphology and cell structure, and thus facilitated microalgae solubilization, providing a large number of biodegradable substrates for subsequent SCFA production. Although K2FeO4 inhibited all the microbial activities relevant to hydrolysis, acidification and methanogenesis processes to some degree, its inhibition to methanogens was much severer than that to other microbes. Illumina MiSeq sequencing analyses revealed that K2FeO4 addition increased the relative abundance (from 9.45% to 50.4%) of hydrolytic and SCFAs-forming bacteria.

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http://hdl.handle.net/10453/144984