典型文献
Anaerobic digestion of sludge by different pretreatments:Changes of amino acids and microbial community
文献摘要：
Many studies have investigated the effects of different pretreatments on the performance of anaerobic digestion of sludge.However,the detailed changes of dissolved organic nitrogen,particularly the release behavior of proteins and the byproducts of protein hydrolysis-amino acids,are rarely known during anaerobic digestion of sludge by different pretreatments.Here we quantified the changes of three types of proteins and 17 types of amino acids in sludge samples solubilized by ultrasonic,thermal,and acid/alkaline pretreatments and their transformation during anaerobic digestion of sludge.Tryptophan protein,aromatic protein I,aromatic protein Ⅱ,and cysteine were identified as the key dissolved organic nitrogen responsible for methane production during anaerobic digestion of sludge,regardless of the different pretreatment methods.Different from the depletion of other amino acids,cysteine was resistant to degradation after an incubation period of 30 days in all sludge samples.Meanwhile,the "cysteine and methionine metabolism (K00270)" was absent in all sludge samples by identifying 6755 Kyoto Encyclopedia of Genes and Genomes assignments of genes hits.Cysteine contributed to the generation of methane and the degradation of acetic,propionic,and n-butyric acids through decreasing oxidation-reduction potential and enhancing biomass activity.This study provided an altemative strategy to enhance anaerobic digestion of sludge through in situ production of cysteine.
文献关键词：
中图分类号：
作者姓名：
Keke Xiao;Zecong Yu;Kangyue Pei;Mei Sun;Yuwei Zhu;Sha Liang;Huijie Hou;Bingchuan Liu;Jingping Hu;Jiaknan Yang
作者机构：
School of Environmental Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Provincial Engineering Laboratory of Solid Waste Treatment,Disposal and Recycle Technology,Wuhan 430074,China;State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China
文献出处：
引用格式：
[1]Keke Xiao;Zecong Yu;Kangyue Pei;Mei Sun;Yuwei Zhu;Sha Liang;Huijie Hou;Bingchuan Liu;Jingping Hu;Jiaknan Yang-.Anaerobic digestion of sludge by different pretreatments:Changes of amino acids and microbial community)[J].环境科学与工程前沿,2022(02):108-122
A类：
solubilized,K00270,altemative
B类：
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AB值：
0.511843
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