一级部分化/anammox系统,泥保留时间短,混合液体低,悬浮固体长期控制:建立,性能和泥特性
Cong Wang1, Li-Fang Liu1, Shu-Jun Zhang2
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
The Science of the total environment
|May 31, 2023
概括
这项研究成功地在基于的系统中培养了无氧氨氧化细菌 (AnAOB),实现了高去除效率. 这表明使用部分化和anammox (PN/A) 进行废水处理的成本效益高效的方法.
科学领域:
- 环境微生物学环境微生物学
- 废水处理工程 废水处理工程
- 生物地质化学循环 生物地质化学循环
背景情况:
- 氧化 (无氧氨氧化) 是一种高效的去除工艺,通常依赖于生物膜或颗粒系统.
- 没有专门的注射剂的部分化 (PN) 和anammox (A) 的纯花泥系统的探索较少.
- 基于floc的系统提供了提高效率和降低成本的潜力,因为面积大.
研究的目的:
- 调查使用纯花污泥的单阶段PN/A系统的建立和性能.
- 评估泥在短泥保留时间 (SRT) 和低混合液体悬浮固体 (SS) 下的泥特性.
- 为了确定自由氨 (FA) /VSS比对PN/A系统性能的影响.
主要方法:
- 进行了一项为期1260天的实验,使用一级PN/A系统处理合成废水.
- 在五个不同的阶段操纵SRT并影响氨度.
- 使用普通的化和脱污泥作为最初的微生物群体.
主要成果:
- 在泥中成功培养和丰富AnAOB,建立了基于纯的anammox系统.
- 实现了87.1%的最大去除效率和3.16公斤N/kgVSS·d的污泥去除负载率.
- 确定了0.5-50毫克NH3-N/gVSS的FA/VSS比为PN/A操作的最佳值,并设置了抑制特定细菌的值.
结论:
- 基于的单阶段PN/A系统可以在没有专门的AnAOB注射的情况下建立,使用标准的化/脱污泥.
- 该系统表现出高去除效率和成本效益,降低了反应堆体积和施工成本.
- 该FA/VSS比率作为一个关键参数,用于控制和优化基于的PN/A系统的性能.
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