电絮凝耦合陶瓷膜滤处理屋面雨水回用于养殖用水  

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

作　　者：李丹怡 王许诺[1] 王增焕[1] 黄珂[1] LI Danyi;WANG Xunuo;WANG Zenghuan;HUANG Ke(Key Laboratory of Fishery Ecology Environment,South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510220,China)

机构地区：[1]中国水产科学研究院南海水产研究所,广东省渔业生态环境重点实验室,广州510220

出　　处：《环境工程学报》2021年第5期1810-1820,共11页Chinese Journal of Environmental Engineering

基　　金：广东省渔业生态环境重点实验室开放基金资助项目(FEEL-2017-14);广东省现代农业产业技术体系创新团队建设专项资金(2021KJ151)。

摘　　要：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、重金属和微生物均具有较好的去除效能,同时处理出水达到养殖用水《无公害食品:淡水养殖用水水质》(NY 5051-2001)的水质要求(大肠菌群未检出,Zn<4.61μg·L^(-1),Cu<4.31μg·L^(-1));随着电流密度增大(2.63×10^(-3)~7.89×10^(-3)A·cm^(-2)),电絮凝可提升膜滤前进水絮体粒径(39~103μm),陶瓷膜污染程度逐渐减缓;此外,在多周期运行过程中,电絮凝可使不可逆性膜污染的程度逐渐减弱。以上研究结果可为屋面雨水回用于养殖用水提供技术参考。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<4.61μg·L^(-1),Cu<4.31μg·L^(-1)).With the increase of current density(2.63×10^(-3)~7.89×10^(-3)A·cm^(-2)),electroflocculation could increase the particle size of flocs(39~103μm)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.

关 键 词：电絮凝 陶瓷膜 屋面雨水 养殖用水 膜污染 

分 类 号：X703[环境科学与工程—环境工程]