ArticleBiotechnology for biofuels and bioproducts2026
Biosynthesis of medium-chain length polyhydroxyalkanoates from pre-treated food wastewater.
Article in Biotechnology for biofuels and bioproducts, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe escalating global plastic waste crisis, coupled with the challenges of managing high-moisture food waste from industrial processing, has prompted nations worldwide to pursue sustainable alternatives and comprehensive waste-reduction strategies. This study addresses this dual challenge by optimizing medium-chain-length polyhydroxyalkanoate (mcl-PHA) production from food wastewater (FWW) using Pseudomonas putida through an iterative refinement process, offering a solution that converts waste into biodegradable plastics.
resultsIn synthetic substrate tests, the highest PHA yield was 0.70 ± 0.05 g PHA/g VSS, with poly(3-hydroxydecanoate) constituting the majority (77.5 ± 2.6%) of the PHA composition, followed by poly(3-hydroxyoctanoate) (15.6 ± 8.8%). These tests underscored the potential of ethanol as a significant contributor to mcl-PHA biosynthesis. In actual substrate tests using pre-treated soluble FWW (P-FWW), the optimal PHA yield was 0.33 ± 0.02 g PHA/g VSS at an F/M ratio of 5. Lower F/M levels (5-25) predominantly produced short-chain-length PHA (scl-PHA), mainly in the form of poly(3-hydroxybutyrate), while higher F/M levels (50-100) favored mcl-PHA, specifically poly(3-hydroxydecanoate).
conclusionsThis study demonstrates that FWW can be effectively valorized as a sustainable feedstock for PHA production, transforming an industrial waste stream into a valuable biopolymer resource. By establishing the critical relationship between feeding strategy (F/M ratio) and PHA composition, this research provides practical guidelines for optimizing microbial biosynthesis at scale. These findings contribute to circular economy principles by simultaneously addressing food-waste management and reducing dependence on petroleum-based plastics, positioning PHA production from FWW as a viable pathway toward sustainable biomanufacturing.
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