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FESE | 前沿研究：预处理促进污泥厌氧消化过程中氨基酸变化规律及菌群分析—论文—科学网
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color: #333333; font-family: 宋体; line-height: 20px;"> <b></b></td> </tr> </table> <p style="text-indent:2em"> 论文标题：<a href="https://journal.hep.com.cn/fese/EN/10.1007/s11783-021-1458-7" target="_blank"><span style="color:#0000ff;">Anaerobic digestion of sludge by different pretreatments: Changes of amino acids and microbial community</span></a> (预处理促进污泥厌氧消化过程中氨基酸变化规律及菌群分析)</p> <p style="text-indent:2em"> 期刊：<em><a href="http://journal.hep.com.cn/fese" target="_blank"><span style="color:#0000ff;">Frontiers of Environmental Science & Engineering</span></a></em></p> <p style="text-indent:2em"> 作者：Keke Xiao, Zecong Yu,Kangyue Pei, Mei Sun, Yuwei Zhu, Sha Liang, Huijie Hou, Bingchuan Liu, Jingping Hu, Jiakuan Yang</p> <p style="text-indent:2em"> 发表时间： 01 Jun 2021</p> <p style="text-indent:2em"> DOI：10.1007/s11783-021-1458-7</p> <p style="text-indent:2em"> 微信链接：<a href="https://mp.weixin.qq.com/s/4aCVC3mStKscMxK2nUOfnA" target="_blank"><span style="color:#0000ff;">点击此处阅读微信文章</span></a></p> <p style="text-indent:2em"> <strong>编者荐语：</strong></p> <p style="text-indent:2em"> 《前沿》系列之《环境科学与工程前沿》荐读</p> <p style="text-indent:2em"> <strong><span style="color:#008080;">原文链接：</span></strong></p> <p style="text-indent:2em"> <strong><a href="https://doi.org/10.1007/s11783-021-1458-7" target="_blank"><span style="color:#008080;">https://doi.org/10.1007/s11783-021-1458-7</span></a></strong></p> <p style="text-indent:2em"> 文章出版：Front. Environ. Sci. Eng. 2022,16(2): 23</p> <p style="text-indent:2em"> <strong><span style="color:#0000cd;">原文信息</span></strong></p> <p style="text-indent:2em"> <strong>题目：</strong></p> <p style="text-indent:2em"> <a href="https://journal.hep.com.cn/fese/EN/10.1007/s11783-021-1458-7" target="_blank"><span style="color:#0000ff;">Anaerobic digestion of sludge by different pretreatments: Changes of amino acids and microbial community</span></a></p> <p style="text-indent:2em"> <strong>作者：</strong></p> <p style="text-indent: 2em; text-align: justify;"> Keke Xiao (肖可可), Zecong Yu (于泽聪), Kangyue Pei(裴康越), Mei Sun (孙玫), Yuwei Zhu (祝雨薇), Sha Liang (梁莎), Huijie Hou (侯慧杰), Bingchuan Liu (刘冰川), Jingping Hu(胡敬平), Jiakuan Yang (<img src="/upload/paper/images/2021/11/202111111034534250.png" style="text-align: -webkit-center;" />)(杨家宽)</p> <p style="text-indent:2em"> <strong>作者单位：</strong></p> <p style="text-indent: 2em; text-align: justify;"> School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China</p> <p style="text-indent:2em"> <strong>关键词：</strong></p> <p style="text-indent:2em"> 污泥预处理；溶解性有机氮；蛋白质；氨基酸；结构方程模型；宏基因分析</p> <p style="text-indent:2em"> <strong><span style="color:#0000cd;">文章亮点</span></strong></p> <p style="text-indent:2em"> • 色氨酸蛋白和芳香蛋白I / II是鉴定的关键蛋白。</p> <p style="text-indent:2em"> • 与其他氨基酸相比，半胱氨酸与甲烷产生的相关性更高。</p> <p style="text-indent:2em"> • 半胱氨酸的存在可以促进甲烷的产生和挥发性脂肪酸的降解。</p> <p style="text-indent:2em"> • 半胱氨酸的存在可以降低氧化还原电位并增加生物量活性。</p> <p style="text-indent:2em"> • <em>Tissierella</em>和<em>Proteiniphilum </em>是预处理的污泥样品中主要菌种</p> <p style="text-indent:2em"> <span style="color:#0000cd;"><strong>文章简介</strong></span></p> <p style="text-indent: 2em; text-align: justify;"> 目前已有大量研究表明不同预处理方法可提高污泥厌氧消化产气效率。然而，不同预处理对污泥厌氧消化过程中溶解有机氮，尤其是蛋白质及蛋白质水解产物-氨基酸的影响尚不清楚。本文对超声、热和酸碱预处理过程中溶解性有机氮中3种蛋白质和17种氨基酸预处理前后及厌氧消化过程中的变化规律进行了系统分析。结果发现，不同预处理方法中，色氨酸蛋白，芳香蛋白I，芳香蛋白II和半胱氨酸均是影响污泥厌氧消化产甲烷过程中的核心蛋白质和氨基酸。经30天污泥厌氧消化后，与其他氨基酸的降解不同，半胱氨酸在污泥样品中出现了累积。通过对氨基酸降解路径研究发现，污泥样品中缺乏“半胱氨酸和蛋氨酸代谢（K00270）”路径。进一步研究发现，半胱氨酸可通过降低氧化还原电位并提高生物质活性，从而促进甲烷的产生以及乙酸，丙酸和正丁酸的降解。这项研究表明可通过半胱氨酸的原位产生来增强污泥厌氧消化，为提高污泥厌氧消化效率提供了一种新的思路。</p> <p style="text-indent: 2em; text-align: center;"> <img src="/upload/paper/images/2021/11/202111111020252370.png" /></p> <p style="text-indent: 2em; text-align: center;"> <strong>图1 摘要图</strong></p> <p style="text-indent: 2em; text-align: center;"> <img src="/upload/paper/images/2021/11/202111111020488150.png" /></p> <p style="text-indent: 2em; text-align: center;"> <strong>图 2. 不同预处理过程中氨基酸变化规律</strong></p> <p style="text-indent: 2em; text-align: center;"> <img src="/upload/paper/images/2021/11/202111111021134710.png" /></p> <p style="text-indent: 2em; text-align: center;"> <strong>图 3. (a) 甲烷产量与氨基酸和蛋白质之间的相关性(b) 结构方程模型分析。显著性水平: <sup>∗</sup>p < 0.05, <sup>∗∗</sup>p < 0.01, and <sup>∗∗∗</sup>p < 0.001</strong></p> <p style="text-indent: 2em; text-align: center;"> <img src="/upload/paper/images/2021/11/202111111021428000.png" /></p> <p style="text-indent: 2em; text-align: center;"> <strong>图 4. (a) 细菌群落分析 (b) 古细菌群落分析); (c) 主成分分析; (d) Tissierella genera富集程度; (e) 与酶活性相关基因分析; (f) 关键性基因分析</strong></p> <p style="text-indent: 2em; text-align: center;"> <img src="/upload/paper/images/2021/11/2021111110222500.png" /></p> <p style="text-indent: 2em; text-align: center;"> <strong>图 5. 不同预处理过程中氨基酸降解路径图</strong></p> <p style="text-indent:2em"> <span style="color:#0000cd;"><strong>编者点评</strong></span></p> <p style="text-indent: 2em; text-align: justify;"> 颗粒有机物向溶解性有机物(Dissolved Organic Matter, DOM)的转化是污泥厌氧消化的第一步，也是污泥厌氧消化过程中的限制步骤。现如今污泥厌氧消化的评估方法通常使用工程参数。DOM可以直接表征使用哪种底物以及在什么条件下使用底物用于污泥厌氧消化。此外，DOM和微生物生态之间复杂的相互作用揭示了其潜在机理以及污泥厌氧消化性能如何以及为何发生变化。在本研究中，结合模型分析，通过对不同预处理方法前后及厌氧消化过程中溶解性有机物中溶解性有机氮进行数据分析发现，半胱氨酸是微生物群落和甲烷产量变化的关键性氨基酸。此外，半胱氨酸的存在可以通过减少ORP和增强生物活性来促进甲烷的生成以及乙酸，丙酸和正丁酸的降解。随着大量污泥的产生，促进有机物的代谢途径向半胱氨酸的生成可能是提高污泥厌氧消化效率的一种潜在方法。</p> <p style="text-indent:2em"> <strong>作者简介</strong></p> <p style="text-indent:2em"> <strong>肖可可</strong>，女，华中科技大学环境科学与工程学院副教授。德国洪堡学者。博士毕业于新加坡南洋理工大学土木与环境学院。近五年来，主持洪堡基金、国家自然科学基金、国家重点研发计划子课题等多个项目。以第一作者/通讯作者发表SCI论文26篇，其中10篇发表于Water Research、Environment International环境ESI期刊。担任Environmental Science &Technology、Water Research等期刊审稿人，是国际水协、国际腐殖酸协会、美国化学协会会员。研究方向为污水污泥资源化处理处置。</p> <p style="text-indent: 2em; text-align: center;"> <img src="/upload/paper/images/2021/11/20211111110465340.jpg" style="text-align: -webkit-center; height: 215px; width: 200px;" /></p> <p style="text-indent:2em"> <strong>摘要</strong></p> <p style="text-indent: 2em; text-align: justify;"> 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 alternative strategy to enhance anaerobic digestion of sludge through in situ production of cysteine.</p> <p style="text-indent:2em"> 投稿与检索</p> <p style="text-indent:2em"> <a href="http://journal.hep.com.cn/fese/EN/2095-2201/home.shtml" target="_blank"><span style="color:#0000ff;">http://journal.hep.com.cn/fese/EN/2095-2201/home.shtml</span></a></p> <p style="text-indent: 2em; text-align: center;"> <img src="/upload/paper/images/2021/11/202111111018596430.jpg" style="text-align: -webkit-center;" /></p> <p style="text-indent:2em"> <span style="color:#ffffff;"><strong><span style="background-color:#4b0082;">《前沿》系列英文学术期刊</span></strong></span></p> <p style="text-indent: 2em; text-align: justify;"> 由教育部主管、高等教育出版社主办的《前沿》（Frontiers）系列英文学术期刊，于2006年正式创刊，以网络版和印刷版向全球发行。系列期刊包括基础科学、生命科学、工程技术和人文社会科学四个主题，是我国覆盖学科最广泛的英文学术期刊群，其中13种被SCI收录，其他也被A&HCI、Ei、MEDLINE或相应学科国际权威检索系统收录，具有一定的国际学术影响力。系列期刊采用在线优先出版方式，保证文章以最快速度发表。</p> <p style="text-indent: 2em; text-align: justify;"> 高等教育出版社入选“中国科技期刊卓越行动计划”集群化项目。Frontier系列期刊中：13种被SCI收录；1种被A&HCI收录；6种被Ei收录；2种被MEDLINE收录；11种中国科技核心期刊；16种被CSCD收录。</p> <p style="text-indent:2em"> <span style="color:#0000ff;"><strong>中国学术前沿期刊网</strong></span></p> <p style="text-indent:2em"> <a href="http://journal.hep.com.cn" target="_blank"><span style="color:#0000ff;"><strong>http://journal.hep.com.cn</strong></span></a></p> <p style="text-indent: 2em; 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