CHENYuan-qing,ZHENGRou-xun,WUZi-ye,et al.Electrocoagulation, Ceramic Membrane Filtration and UV Disinfection Integrated Equipment for Rainwater Treatment[J].China Water & Wastewater,2024,40(15):131-136.
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Electrocoagulation, Ceramic Membrane Filtration and UV Disinfection Integrated Equipment for Rainwater Treatment

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第15期 Page: 131-136 Column: Date of publication: 2024-08-01
Author(s):
CHEN　Yuan-qing1;  ZHENG　Rou-xun1;  WU　Zi-ye1;  LU　Sen1;  WANG　Chao-guang2;  CHEN　Qin2;  DU　Xing1
（1. School of Civil and Transportation Engineering， Guangdong University of Technology， Guangzhou 510006， China； 2. Guangdong Architectural Design and Research Institute Group Co. Ltd.， Guangzhou 510010， China）
Keywords:
roof rainwater;  electrocoagulation;  solar energy;  gravity-driven ceramic membrane
Abstract:
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.
Last Update: 2024-08-01