Exploring polyhydroxyalkanoates biosynthesis using hydrocarbons as carbon source: a comprehensive review

CORTI MONZÓN, G.; BERTOLA, G.; HERRERA SEITZ, M. K.; MURIALDO, S. E.

BIODEGRADATION

SPRINGER

Año: 2024

0923-9820

Environmental pollution caused by pet- rochemical hydrocarbons (HC) and plastic waste is a pressing global challenge. However, there is a promising solution in the form of bacteria that pos- sess the ability to degrade HC, making them valuable tools for remediating contaminated environments and effluents. Moreover, some of these bacteria offer far- reaching potential beyond bioremediation, as they can also be utilized to produce polyhydroxyalkanoates (PHAs), a common type of bioplastics. The accu- mulation of PHAs in bacterial cells is facilitated in environments with high C/N or C/P ratio, which are often found in HC-contaminated environments and effluents. Consequently, some HC-degrading bacte- ria can be employed to simultaneously produce PHAs and conduct biodegradation processes. Although bacterial bioplastic production has been thoroughly studied, production costs are still too high compared to petroleum-derived plastics. This article aims to provide a comprehensive review of recent scientific advancements concerning the capacity of HC-degrad- ing bacteria to produce PHAs. It will delve into the microbial strains involved and the types of bioplas- tics generated, as well as the primary pathways for HC biodegradation and PHAs production. In essence, we propose the potential utilization of HC-degrading bacteria as a versatile tool to tackle two major envi- ronmental challenges: HC pollution and the accu- mulation of plastic waste. Through a comprehensive analysis of strengths and weaknesses in this aspect, this review aims to pave the way for future research in this area, with the goal of facilitating and promoting investigation in a field where obtaining PHAs from HC remains a costly and challenging process.