具有两步化的ASM2d模型可以更好地模拟用完整的氨氧化细菌 (comammox Nitrospira) 丰富的生物营养去除系统
Peng Mei1, Zhiqi Wang1, Wenjie Guo1
1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China.
Chemosphere
|June 9, 2023
概括
发现comammox Nitrospira对废水化有影响. 两步化模型 (ASM2d-TSN) 与单步模型相比,更好地模拟了这些生物体的废水处理厂.
科学领域:
- 环境微生物学环境微生物学
- 废水工程 废水工程
- 生物地质化学循环是什么
背景情况:
- 发现了一种完全氧化氨的细菌Comammox Nitrospira,改变了我们对化的理解.
- 化是废水处理厂 (WWTP) 中生物营养去除 (BNR) 的一个关键过程.
研究的目的:
- 为了评估激活泥模型号的适用性. 2d与一步 (ASM2d-OSN) 或两步化 (ASM2d-TSN) 模拟含有comammoxNitrospira的WWTP.
- 为了研究操作条件的影响,如溶解氧 (DO) 和污泥保留时间 (SRT) 对comammoxNitrospira丰富.
主要方法:
- 进行了微生物分析,以评估comammoxNitrospira的丰度.
- 测量了动力参数,以了解微生物活动.
- 使用WWTP运行数据和水质参数来比较ASM2d-OSN和ASM2d-TSN模型的性能.
主要成果:
- 在低DO和长时间SRT条件下,发现ComammoxNitrospira被丰富.
- 在I阶段条件下,Nitrospira的相对丰度和comammox amoA基因拷贝数显著高于I阶段条件 (0.5 mg/L DO,60 d SRT) 与II阶段 (4.0 mg/L DO,26 d SRT) 相比.
- ASM2d-TSN模型在第一阶段条件下更好地模拟了WWTP的性能,对水质参数的Theil不平等系数比ASM2d-OSN更低.
结论:
- 由于存在comammoxNitrospira,因此需要在WWTP中调整化建模.
- 一个两步化模型 (ASM2d-TSN) 更适合模拟WWTP过程当 comammox Nitrospira 存在.
- 优化DO和SRT可以促进comammoxNitrospira的丰富,从而影响处理效率.
关键词:
具有两步化 (ASM2d-TSN) 的ASM2d康马莫克斯 (Comammox) 尼托斯皮拉 (nitrospira) 是一种全面的废水处理厂 (WWTPs).动力参数 动力参数微生物分析 微生物分析更多相关视频
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