Biological conversion of methane to polyhydroxyalkanoates:Current advances,challenges,and perspectives  

作　　者：Lu-Yao Liu Guo-Jun Xie De-Feng Xing Bing-Feng Liu Jie Ding Nan-Qi Ren 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin,150090,China

出　　处：《Environmental Science and Ecotechnology》2020年第2期64-71,共8页环境科学与生态技术（英文）

基　　金：the Natural Science Foundation of China(grant no.51778173 and 51808167);Fundamental Research Funds for the Central Universities;the Fok Ying Tung Education Foundation;State Key Laboratory of Urban Water Resource and Environment;Harbin Institute of Technology(2018DX05)for supporting this study.

摘　　要：Methane emissions and plastic pollution are critical global challenges.The biological conversion of methane to poly-b-hydroxybutyrate(PHB)not only mitigates methane emissions but also provides biodegradable polymer substitutes for petroleum-based materials used in plastics production.This work provides an early overview of the methane-based PHB advances and discusses challenges and related strategies.Recent advances of PHB,including PHB biosynthetic pathways,methanotrophs,bioreactors,and the performances of PHB materials are introduced.Major challenges of methane-based PHB production are discussed in detail;these include low efficiency of methanotrophs,low gas-liquid mass transfer efficiency,and poor material properties.To overcome these limitations,various approaches are also explored,such as feast-famine regimes,engineered microorganisms,gas-permeable membrane bioreactors,two-phase partitioning bioreactors,poly-b-hydroxybutyrate-co-hydroxyvalerate synthesis,and molecular weight manipulation.

关 键 词：POLYHYDROXYALKANOATE METHANOTROPHS METHANE Biodegradable plastics Greenhouse gas 

分 类 号：TQ3[化学工程]