Journal
BIORESOURCE TECHNOLOGY
Volume 339, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125616
Keywords
PHB; Biodegradable polymer; Waste gas; CO2
Funding
- Research and Development Program of the Korea Institute of Energy Research [KIER-C1-2476]
- C1 Gas Refinery Program through the NationalResearch Foundation of Korea (NRF) - Ministry of Science and ICT [2021M3D3A1A01079479]
- National Research Foundation of Korea [2021M3D3A1A01079479] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Recent progress in bacterial strains for PHB production from CO2, along with technical approaches like two-stage bioprocesses and bioelectrochemical systems, are discussed. Challenges and future perspectives for economically feasible PHB production are also addressed.
The recalcitrance of petroleum-based plastics causes severe environmental problems and has accelerated research into production of biodegradable polymers from inexpensive and sustainable feedstocks. Various microorganisms are capable of producing Polyhydroxybutyrate (PHB), a representative biodegradable polymer, under nutrient-limited conditions, among which CO2-utilizing microorganisms are of primary interest. Herein, we discuss recent progress on bacterial strains including proteobacteria, purple non-sulfur bacteria, and cyanobacteria in terms of CO2-containing carbon sources, PHB-production capability, and genetic modification. In addition, this review introduces recent technical approaches used to improve PHB production from CO2 such as two-stage bioprocesses and bioelectrochemical systems. Challenges and future perspectives for the development of economically feasible PHB production are also discussed. Finally, this review might provide insights into the construction of a closed-carbon-loop to cope with climate change.
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