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将电凝过程与水下膜生物反应器集成在一起,用于在低压梯度下处理废水

Khalid Bani-Melhem¹, Maria Elektorowicz², Muhammad Tawalbeh³

¹Water Technology Unit (WTU), Center for Advanced Materials (CAM). Qatar University, P.O. Box 2713, Doha, Qatar.

|August 3, 2023

概括

在潜水膜生物反应器 (SMBR) 中进行电凝预处理可以减少膜污染. 优化电压梯度是平衡污染物去除和最大限度地减少离子积累的关键,以有效处理废水.

科学领域:

环境科学环境科学
水处理工程水处理工程
化学工程是化学工程的重要组成部分.

背景情况:

再利用废水对于全球水资源管理至关重要.
像PAHs这样的新兴污染物对传统处理提出了挑战.
潜水膜生物反应器 (SMBR) 中的膜污染限制了效率.

研究的目的:

调查电凝 (EC) 作为SMBR预处理的疗效.
评估EC预处理对膜污染和污染物去除的影响.
为了比较EC-SMBR与使用真实灰色水的传统SMBR的性能.

主要方法:

一个潜水膜生物反应器 (SMBR) 运行了60天.
一个电凝器 (EC) 装置被集成为预处理.
在EC单元中测试了两个电压梯度 (0.64V/cm和1.26V/cm).

主要成果:

与单独的SMBR相比,EC-SMBR的电压梯度为1.26V/cm显著改善了去除度,颜色,COD,NH3-N和TP的情况.
在EC单元中的低电压梯度 (0.64V/cm) 减少了23.7%的SMBR污染,但没有显著改善污染物去除.
与EC-SMBR相比,单独的SMBR显示出较高的离子表面活性剂 (AS) 清除能力.

结论:

电凝预处理可以减轻SMBR中的膜污染,特别是在低电压梯度下,只要控制离子度.
较高的电压梯度增强了污染物去除,但可能导致不一致的污染减少和Al离子积累问题.
对EC-SMBR用于大规模应用的进一步研究应侧重于恒定流量,能源消耗和运营成本.

关键词:

电凝器是电凝的方法之一.灰色的水灰色的水膜污染是因为膜污染.这些PAHs是PAH.潜水膜生物反应器是一个潜水膜生物反应器.

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