Enhancement of 3-hydroxyvalerate fraction in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) produced by Haloferax mediterranei fed with food waste pretreated via arrested anaerobic digestion integrated with microbial electrolysis cells

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-04-12 DOI:10.1016/j.biortech.2025.132536

Xueyao Zhang , Naresh Kumar Amradi , Martin Moore , Amro Hassanein , Rebecca L. Mickol , Emily L. McCoy , Brian J. Eddie , Jamia S. Shepard , Jiefu Wang , Stephanie Lansing , Matthew D. Yates , Young-Teck Kim , Zhi-Wu Wang

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Abstract

Bioplastics made of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) with a 20 mol% HV fraction are highly desirable in the market for 3-Hydroxyvalerate (HV)-conferred superior thermal, biological, and mechanical properties. Although Haloferax mediterranei (HM) is capable of producing PHBV from food waste, its HV fraction is generally lower than 10 mol%. This study for the first time investigated the engineering approach to increasing HV fraction through elevating the propionic and valeric acid fractions in volatile fatty acids (VFAs) produced from food waste via arrested anaerobic digestion with and without microbial electrolysis cells (MECs) incorporation. Results showed that HV fraction in PHBV produced by HM is proportional to the fractions of propionic and valeric acids in VFAs. A 20 mol% HV fraction can be achieved by MECs incorporation, which might be attributable to pH regulation by the MECs. These findings lay a foundation for developing waste-processing technologies that enable the production of high-value, microbially-derived materials.

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地中海卤代铁以经微生物电解池阻氧消化预处理的食物垃圾为食，提高其聚（3-羟基丁酸盐-co-3-羟基戊酸盐）中3-羟戊酸酯的含量

聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV）以20 mol%的HV分数制成的生物塑料在市场上是非常理想的，因为3-羟基戊酸酯（HV）具有优越的热、生物和机械性能。虽然地中海卤霉（HM）能够从食物垃圾中产生PHBV，但其HV分数通常低于10 mol%。本研究首次探讨了通过与微生物电解细胞（MECs）混合或不混合的厌氧消化，通过提高食物垃圾挥发性脂肪酸（VFAs）中丙酸和戊酸组分来提高HV分数的工程方法。结果表明，HM产生的PHBV中HV的含量与VFAs中丙酸和戊酸的含量成正比。mec掺入可使HV分数达到20 mol%，这可能是由于mec对pH的调节作用。这些发现为开发能够生产高价值微生物衍生材料的废物处理技术奠定了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.