| 丝状菌膨胀污泥好氧颗粒化稳定性及微生物多样性 |
| 摘要点击 1552 全文点击 512 投稿时间：2021-10-14 修订日期：2021-12-03 |
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| 中文关键词 丝状菌 膨胀污泥 好氧颗粒 稳定性 微生物群落结构 |
| 英文关键词 filamentous bacteria sludge bulking aerobic granule stability microbial community structure |
| 作者 | 单位 | E-mail | | 高春娣 | 北京工业大学环境与生命学部, 城镇污水深度处理与资源化利用技术国家工程实验室, 北京 100124 | gaochundi@bjut.edu.cn | | 杨箫阳 | 北京工业大学环境与生命学部, 城镇污水深度处理与资源化利用技术国家工程实验室, 北京 100124 | | | 欧家丽 | 北京工业大学环境与生命学部, 城镇污水深度处理与资源化利用技术国家工程实验室, 北京 100124 | | | 韩颖璐 | 北京工业大学环境与生命学部, 城镇污水深度处理与资源化利用技术国家工程实验室, 北京 100124 | | | 程丽阳 | 北京工业大学环境与生命学部, 城镇污水深度处理与资源化利用技术国家工程实验室, 北京 100124 | | | 彭永臻 | 北京工业大学环境与生命学部, 城镇污水深度处理与资源化利用技术国家工程实验室, 北京 100124 | |
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| 中文摘要 |
| 丝状菌作为污水生物处理中的常见菌种，被认为是诱发污泥膨胀的主要因素.然而由于其特殊的丝状形态，对污泥颗粒的形成起到了至关重要的作用.以丝状菌膨胀污泥为研究对象，探究丝状菌对污泥颗粒化过程及维持污泥颗粒稳定性的影响，并对污泥系统微生物多样性进行分析.试验分别接种丝状菌膨胀污泥（SVI=241.56 mL ·g-1）和絮状污泥（SVI=64.22 mL ·g-1）进行颗粒化培养，结果表明，膨胀污泥和絮状污泥颗粒出现时间分别为20 d和40 d，成熟颗粒粒径分别为650 μm和700 μm，膨胀污泥颗粒化时间仅为絮状污泥的一半.缺氧区添加后，颗粒都有不同程度破碎，但膨胀污泥培养的成熟颗粒SV30/SV5值短期波动后恢复至1，维持稳定性能力更强.微生物群落结构分析表明，膨胀污泥中norank_o__Saccharimonadales、unclassified_o__Saccharimonadales和unclassified_f__Saccharimonadaceae相对丰度从0.05%、0.01%和0.01%增长至4.09%、3.15%和1.12%，此类疏水性细菌存在及累积对快速颗粒化有重要意义.在膨胀污泥SBR1和絮状污泥SBR2反应器中，COD、NH4+-N、TN去除率分别为94%、99%、35%和92%、97%、30%，去除效果差别不大；而TP去除率分别为60%和30%. |
| 英文摘要 |
| Filamentous bacteria, as one of the common bacteria types in wastewater biological treatment, are considered to be the main factor to induce sludge bulking. However, because of its special filamentous shape, it plays a crucial role in the formation of sludge particles. Taking filamentous bulking sludge as the research object, the effect of filamentous bacteria on the sludge granulation process and maintaining the stability of sludge granules was studied, and the microbial diversity of the sludge system was analyzed. Filamentous bulking sludge (SVI=241.56 mL·g-1) and flocculated sludge (SVI=64.22 mL·g-1) were respectively inoculated to carry out granulation culture. The results showed that the time of particle appearance of bulking sludge and flocculated sludge was 20 days and 40 days, respectively; the mature particle sizes were 650 μm and 700 μm, respectively; and the granulation time of bulking sludge was only half that of flocculated sludge. After adding the anoxic zone, the granules were broken to differing degrees, but the SV30/SV5 value of mature granules recovered to 1 after short-term fluctuation, and the stability of the mature granules was stronger. The analysis of microbial community structure showed that the relative abundance of norank_o__Saccharimonadales, unclassified_o__Saccharimonadales, and unclassified_f__Saccharimonadaceae increased from 0.05%, 0.01%, and 0.01% to 4.09%, 3.15%, and 1.12%. The existence and accumulations of these hydrophobic bacteria were important for rapid granulation. The removal rates of COD, NH4+-N, and TN were 94%, 99%, and 35% and 92%, 97%, and 30%, respectively, in SBR1 of bulking sludge and SBR2 of flocculated sludge, and the removal rates of TP were 60% and 30%, respectively. |
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