Poly-3-hydroxybutyrate (PHB) is a biodegradable polymer produced by many bacteria. Some of the properties are similar to thermoplastics like polypropylene, hence finding application PHB can directly replace non-biodegradable polymers. But the main barrier has been the cost difference. The utilization of mixed microbial cultures facilitates the use of complex substrates and thus can reduce the cost of PHB production. In the present study, mixed culture systems, where metabolite produced by one organism may be assimilated by the other organism, were employed.
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