Towards biodegradable polyhydroxyalkanoate production from wood waste: Using volatile fatty acids as conversion medium. (March 2020)

• Record Type: Journal Article
• Authors: Li, Dongna; Yin, Fen; Ma, Xiaojun
• Is Part Of: Bioresource technology. Volume 299(2020)
• Publication Date: 2020-03
• Subjects: Wood waste -- Sewage -- Volatile fatty acids -- Polyhydroxyalkanoate -- Microbial community; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.122629
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Dual-effect of sewage created a biotransformation of VFAs to PHA by wood waste. A high PHA production of 2639 mg COD/L was obtained. Uncontrolled pH and VFAs with even acids were more conducive to produce PHA. Bacteroidetes and Proteobacteria domained in the system. Abstract: Production of polyhydroxyalkanoate (PHA) via mixed microbial consortia is a potential economic alternative responding to the current demand for functional greener materials to replace traditional petroleum-based polymers. The goal of this study was to synthesize PHA using volatile fatty acids (VFAs) obtained from the co-fermentation of pretreated wood waste and sewage as carbon source. High PHA yield of 0.71 g COD PHA/g COD VFAs and PHA content of 50.3 g PHA/100 g VSS were obtained at VFAs ratio (even:odd) of 88:12 after seven cycles cultivation. Even acids were more suitable for accumulating PHA as the preferred carbon source than odd acids, resulting in 3-hydroxybutyrate being the main monomer. PHA production achieved to the highest value of about 2639 mg COD/L at 1400 mg COD/L VFAs concentration. The bacterial genera displayed a highly diverse of the microbial community for the synthesis of PHA.