电絮凝/陶瓷膜滤/UV消毒一体化设备处理雨水

Electrocoagulation,Ceramic Membrane Filtration and UV Disinfection Integrated Equipment for Rainwater Treatment

通过构建太阳能驱动电絮凝+重力驱动陶瓷膜滤+紫外消毒的一体化雨水处理设备,对模拟屋面雨水进行处理。结果显示,太阳能光伏发电系统的产电量可完全满足该系统的运行需求。在长期运行中,该系统对浊度、总磷、UV254、氨氮、CODMn等具有良好的去除效果,其中,浊度、总磷、氨氮去除率接近100%。在电絮凝预处理的作用下,重力驱动陶瓷膜滤面生物净水层孔隙率增加,产水效能提高,且在系统暂停运行90 d后,陶瓷膜面生物净水层的微生物仍保持良好的生存状态,重启后能够在维持高效率去除氨氮的同时保持稳定的膜通量,这一优异性能匹配了雨水的间歇性降水和水量不稳定性的特征。通过紫外消毒系统可有效杀灭膜滤出水残留细菌,进一步提高出水的微生物安全性。此外,该装置全程结合太阳能和屋面距离地面的重力势能作为驱动力净化雨水,节约能耗,可为分散式屋面雨水收集利用提供技术支撑。

The construction of an integrated rainwater treatment system,featuring solar-driven electrocoagulation combined with gravity-driven ceramic membrane filtration and ultraviolet disinfection,was undertaken to treat simulated roof rainwater.The solar photovoltaic power generation system could fully satisfy the operational requirements of the system.The system demonstrated excellent long-term performance in removing indicators such as turbidity,total phosphorus,UV254,ammonia nitrogen and CODMn,with removal rates for turbidity,total phosphorus,and ammonia nitrogen approaching 100%.Through electrocoagulation pretreatment,the porosity of the biological purification layer on the gravity-driven ceramic membrane surface was increased,leading to improved water production efficiency.Furthermore,even after a 90-day system suspension,the microorganisms in the biological purification layer on the ceramic membrane surface maintained a robust living state and sustained stable membrane flux with high efficiency in ammonia nitrogen removal upon restart.This outstanding performance aligned with the intermittent precipitation and fluctuating rainwater quantity characteristics.The UV disinfection system was capable of effectively eradicating residual bacteria in the effluent from the membrane filtration,thereby enhancing the microbial safety of the effluent.Furthermore,the system harnessed both solar energy and gravitational potential energy from the rooftop to the ground as a driving force for rainwater purification,reducing energy consumption and offering technical support for decentralized collection and utilization of rainwater on rooftops.