Polyhydroxyalkanoates (PHAs) production from fermented cheese whey by using a mixed microbial culture. (October 2016)

• Record Type: Journal Article
• Authors: Colombo, Bianca; Pepè Sciarria, Tommy; Reis, Maria; Scaglia, Barbara; Adani, Fabrizio
• Is Part Of: Bioresource technology. Volume 218(2016)
• Page Start: 692
• Page End: 699
• Publication Date: 2016-10
• Subjects: Acid fermentation -- Cheese whey -- Fed-batch assay -- Mixed microbial culture (MMC) -- Polyhydroxyalkanoates (PHAs); 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.2016.07.024
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Fermented cheese whey (CW) were used as substrate for PHA production. Enriched mixed microbial culture was produced from activated sewage sludge. Different organic acids configuration of fermented CWs modified PHA composition. PHA yield obtained were of 60–70 g kgcheese whey Total Solid −1 . Abstract: Two fermented cheese wheys (FCW), FCW1 composed of lactic, acetic and butyric acids in the proportion of 58/16/26 (% CODOrganic Acid (OA) ) and FCW2 composed of acetic, propionic, butyric, lactic and valeric acids in the proportion of 58/19/13/6/4 (% CODOA ) were used to produce polyhydroxyalkanoates (PHAs) by using a pre-selected mixed microbial culture (MMC). PHA accumulation gave for fermented FCW1 a PHA yield (Ytot ) of 0.24 ± 0.02 mg CODPHA mg CODSoluble Substrate(SS) −1 and a total PHA production, referred to the substrate used, of 60 g PHA kgcheese whey Total Solids (TS) −1 . For fermented FCW2 results were: PHA yield (Ytot ) of 0.42 ± 0.03 mg CODPHA mg CODSS −1 and PHA from a substrate of 70 g PHA kgcheese whey TS −1 . Qualitatively, PHAs from FCW1 was made up exclusively of 3-hydroxybutyrate (HB), while those obtained from FCW2 were composed of 40% of 3-hydroxyvalerate (HV) and 60% of HB.