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A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater
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Researchers reviewed microbial production of polyhydroxyalkanoates (PHAs) from wastewater organic carbon and nitrogen, finding that while mixed microbial cultures can achieve competitive bioplastic yields, process scale-up is constrained by inconsistent feedstock composition and high downstream extraction costs.
Organic carbon and nitrogen present in wastewater offer a promising, cost-effective source for producing bioplastic. Previous attempts have focused on enhancing productivity through optimizing culture systems and growth conditions. However, despite technological progress, significant challenges persist, such as low productivity, intricate downstream processing, scalability issues, and the properties of resulting PHA.
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This review examines the biosynthesis and recovery of polyhydroxyalkanoate (PHA), a microbially-produced biodegradable bioplastic that could replace petrochemical plastics and reduce microplastic pollution. The main barrier to commercialization is production cost, and the paper discusses strategies for making PHA economically viable at scale.
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