电絮凝耦合陶瓷膜滤处理屋面雨水回用于养殖用水

为了应对水产品养殖业迅速发展对水资源需求的危机,开发了电絮凝耦合陶瓷膜滤的短流程工艺处理屋面雨水,旨在回用于养殖用水.首先以模拟雨水作为处理对象优化耦合工艺的运行条件,再基于优化的工艺条件,以实际雨水为处理对象进行净水效能和膜污染特性的考察.结果表明:耦合工艺对于屋面雨水的颗粒物、溶解性有机物(DOM)、总磷、重金属和...

Treatment of roofing rainwater using electro-flocculation coupled with ceramic membrane ultrafiltration process for aquaculture water reuse

To tackle the crisis between water shortage and rapid development of aquaculture water demand, a shortened process of electro-flocculation coupled with ceramic membrane ultrafiltration was developed to treat roofing rainwater for aquaculture water reuse. Firstly, the operational parameters of the coupling process were optimized when treating the synthetic roofing rainwater. Then, based on the optimized conditions, the water purification efficiency and the membrane fouling characteristics of the coupling process were systematically explored when treating the actual rainwater. The result showed that electro-flocculation combined ceramic ultrafiltration process exhibited a high removal efficiency for particles, dissolved organic matter (DOM), total phosphorus, microorganism and so on, and the effluent could meet the aquaculture water quality requirements of “Pollution-free food: freshwater aquaculture water quality” (NY 5051-2001) (i.e., coliform was not detected, Zn<4.61 μg·L−1, Cu<4.31 μg·L−1). With the increase of current density (2.63×10−3~7.89×10−3 A·cm−2), electro-flocculation could increase the particle size of flocs(39~103 μm) in influent prior to membrane, and ceramic membrane fouling was gradually alleviated; Additionally, during a long-term operation of this coupling process, electro-flocculation could relieve irreversible membrane fouling. This study will provide a theoretical guidance and technical support for aquaculture water reuse from roofing rainwater.