Research progress of poly-β-hydroxybutyrate production by photosynthetic bacteria

Abstract:

Petroleum-based plastics will cause pollution and affect human health after entering the environment. Therefore, looking for alternatives to petroleum-based plastics has become the trend of future development. Bioplastics have attracted much attention in recent years because of their good biodegradability and safety; in particular, poly-β-hydroxybutyrate (PHB), one of the bioplastics, has become an important source for the production of bioplastics. Photosynthetic bacteria (PSB) is an important raw material for PHB production. PSB can use the cheap carbon source in wastewater as a substrate to accumulate PHB, which can realize the recycling of wastewater, and its application prospects are broad. This paper systematically summarizes the PSB strains that can produce PHB, the synthesis pathway of PHB in the bacteria, the factors affecting the accumulation of PHB by PSB, and the research status of purple non-sulfur bacteria (pnsb) accumulating PHB by wastewater. The prospect of the engineering application of pnsb wastewater recycling technology for PHB production from wastewater is put forward, aiming to provide new ideas and reference for solving the pollution of petroleum based plastics and wastewater recycling.

Key words:photosynthetic bacteria, purple non-sulfur bacteria, poly-β-hydroxybutyrate (PHB), polyhydroxyalkanoates (PHA)