Road to full bioconversion of biowaste to biochemicals centering on chain elongation: A mini review  

作　　者：Wenhao Han Pinjing He Liming Shao Fan Lü 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092,China [2]Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China [3]Institute of Waste Treatment and Reclamation,Tongji University,Shanghai 200092,China [4]Centre for the Technology Research and Training on Household Waste in Small Toums&Rural Area,Ministry of Housing and Urban-Rural Development of China(MOHURD),China

出　　处：《Journal of Environmental Sciences》2019年第12期50-64,共15页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 51622809, 51878471)

摘　　要：Production of biochemicals from waste streams has been attracting increasing worldwide interest to achieve climate protection goals.Chain elongation(CE)for production of mediumchain carboxylic acids(MCCAs,especially caproate,enanthate and caprylate)from diverse biowaste has emerged as a potential economic and environmental technology for a sustainable society.The present mini review summarizes the research utilizing various synthetic or real waste-derived substrates available for MCCA production.Additionally,the microbial characteristics of the CE process are surveyed and discussed.Considering that a large proportion of recalcitrantly biodegradable biowaste and residues cannot be further utilized by CE systems and remain to be treated and disposed,we propose here a loop concept of bioconversion of biowaste to MCCAs making full use of the biowaste with zero emission.This could make possible an alternative technology for synthesis of value-added products from a wide range of biowaste,or even non-biodegradable waste(such as,plastics and rubbers).Meanwhile,the remaining scientific questions,unsolved problems,application potential and possible developments for this technology are discussed.Production of biochemicals from waste streams has been attracting increasing worldwide interest to achieve climate protection goals. Chain elongation(CE) for production of mediumchain carboxylic acids(MCCAs, especially caproate, enanthate and caprylate) from diverse biowaste has emerged as a potential economic and environmental technology for a sustainable society. The present mini review summarizes the research utilizing various synthetic or real waste-derived substrates available for MCCA production. Additionally, the microbial characteristics of the CE process are surveyed and discussed. Considering that a large proportion of recalcitrantly biodegradable biowaste and residues cannot be further utilized by CE systems and remain to be treated and disposed, we propose here a loop concept of bioconversion of biowaste to MCCAs making full use of the biowaste with zero emission. This could make possible an alternative technology for synthesis of value-added products from a wide range of biowaste, or even non-biodegradable waste(such as, plastics and rubbers). Meanwhile, the remaining scientific questions, unsolved problems, application potential and possible developments for this technology are discussed.

关 键 词：Organic waste Waste valorization Chain elongation Medium-chain carboxylic acids Functional microbes Electron donors 

分 类 号：F42[经济管理—产业经济]