文献类型：期刊文献

英文题名：A recent trend in anaerobic digestion (AD): Enhancement of microbiome and digestibility of feedstocks via abiotic stress factors for biomethanation

作者：Thakur, Nandini[1,2];Sharma, Monika[1,2];Alghamdi, Hisham[3];Zheng, Yuanzhang[4];Xue, Wu[5,6,7];Jeon, Byong-Hun[8];Salama, El-Sayed[2];Li, Xiangkai[1]

第一作者：Thakur, Nandini

通信作者：Li, XK[1];Salama, E[2]

机构：[1]Lanzhou Univ, Sch Life Sci, Key Lab Cell Act & Stress Adaptat, Minist Educ, Lanzhou 730000, Gansu, Peoples R China;[2]Lanzhou Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth, Lanzhou 730000, Gansu, Peoples R China;[3]Najran Univ, Coll Engn, Elect Engn Dept, Najran, Saudi Arabia;[4]Curia Global Inc, Discovery Biol, Albany, NY USA;[5]Lanzhou Univ, Dept Cardiol, Hosp 2, Lanzhou, Peoples R China;[6]Lanzhou Univ, Clin Med Coll 2, Lanzhou, Peoples R China;[7]Gansu Univ Chinese Med, Coll Integrated Tradit Chinese & Western Med, Lanzhou, Peoples R China;[8]Hanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea

第一机构：Lanzhou Univ, Sch Life Sci, Key Lab Cell Act & Stress Adaptat, Minist Educ, Lanzhou 730000, Gansu, Peoples R China

通信机构：[1]corresponding author), Lanzhou Univ, Sch Life Sci, Key Lab Cell Act & Stress Adaptat, Minist Educ, Lanzhou 730000, Gansu, Peoples R China;[2]corresponding author), Lanzhou Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth, Lanzhou 730000, Gansu, Peoples R China.

年份：2023

卷号：472

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001052208600001)】；

基金：The authors are thankful to the start-up fund for the construction of the double first-class project (No. 561119201) , Lanzhou, University, China. The athors also thank the Science and Technology Department of Gansu Province, (21JR7RA399) , and the Cuiying Scientific and Technological Innovation Program of Lanzhou University Second Hospital (CY2021-BJ-A17) .

语种：英文

外文关键词：Abiotic stress; Substrate digestion; Biomethanation; Microbes; Enzymes; Pilot -scale

摘要：Anaerobic digestion (AD) is a potential environment-benign approach to stabilize biowaste and subsequently generate biomethane. The complete utilization of biowaste in AD relies on substrate composition, microbial activity, and abiotic stress factors (ASFs). The recent research trend on the ASFs applications (including salinity, micronutrients, micro-aeration, and organic substances) to improve digestibility and biomethanation from different feedstocks has increased. Previous reviews have emphasized only the effect of operational parameters (such as temperature, pH, digestion times, and co-substrates) on AD efficiency. However, no review discussed the recent ASFs application in AD. Thus, this review intends to fully cover the effects of ASFs on substrate di-gestibility, biomethanation, microbial shifts, functional enzymes, and metabolic pathways. Salinity stress was reported to enhance biomethane (by 13-49%), microbial abundance (Methanosaeta and Methanosarcina), en-zymes (including hydrolases, dehydrogenases, and co-enzyme F420), and metabolic pathways (solute transfer and ATP synthesis) at the lab-scale. The micro-aeration stress enhanced biomethanation owing to increased activity of hydrolases, volatile fatty acids production/oxidation, and high sulfide mitigation (upto 90%) at both lab. and pilot-scale. Micronutrient stress improved biomethanation by 10-50% and 30-65% at the lab. and pilot-scale, respectively, due to high direct interspecies electron transport which increases the abundance of Methano-brevibacter and Methanosarcina. Antibiotics augmented the biowaste solubilization and biomethane production upto 70 and 46%, respectively. Binary ASFs application in AD also facilitated the feedstock digestibility and biomethanation. However, the integration of multiple ASFs to attain high biomethanation and a holistic un-derstanding of synergistic mechanisms needs more research.