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组合测序批量运行和A/O过程以实现部分主流Anammox:试点规模示范和微生物生态机制

Ronghua Xu^1,2, Hongcan Cui^1,2, Fuqiang Fan^1,2

¹School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China.

Environmental science & technology

|September 5, 2023

概括

这项研究展示了一种新的废水处理方法,使用无氧生物膜反应器来实现有效的和去除,而无需初始播种. 该过程成功丰富了anammox细菌,并支持营养恢复.

科学领域:

环境微生物学环境微生物学
废水工程废水工程
生物反应器技术技术

背景情况:

传统的废水处理系统难以有效地去除和.
无氧氨氧化 (anammox) 为去除提供了一个有希望的,低能耗的替代方案.
开发用于*in situ* anammox细菌丰富的方法对于实际应用至关重要.

研究的目的:

为了研究实现无氧氧化 (anammox) 的可行性,而不是在经过修改的无氧/有氧膜生物反应器中播种.
在测序批量操作下评估和去除效率和微生物群体动态.
探索生物膜结构和微生物相互作用在促进 anammox 和营养物质去除中的作用.

主要方法:

使用试点规模的无氧生物膜修改无氧/有氧膜生物反应器.
雇佣了测序批量运行250天.
进行了元基因组测序来分析微生物群落和功能基因.

主要成果:

实现了高达80%的总和去除,废水度为4.95 mg-N/L和0.48 mg-P/L.
在无氧生物膜中观察到*in situ*的anammox细菌的丰富度达到7.86%的最大相对丰度.
确定了脱化作为主要的去除途径 (38.41%),并补充了显著的脱化去除 (40.54%) 和有氧吸收 (48.40%).
甲基因组分析揭示了生物膜中较低的NO降解基因,有利于anammox,并丰富了减轻有机抑制的特定细菌.

结论:

该研究提出了一个可行的策略,用于丰富anammox细菌,并实现部分主流的anammox和无化去除 (DPR) 在城市废水处理中.
在生物膜反应器中对批量运行进行测序,有效地支持无需注射的anammox细菌的生长和功能.
生物膜社区内的合作微生物相互作用对于有效的营养物质去除和过程稳定至关重要.

关键词:

活性污泥活动污泥在 anammox 中使用.细菌生态学细菌生态学市政废水处理的城市废水处理.序列化批量操作批量操作

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