TIANHaicheng,LIULu,FANDan,et al.Design Points of Double-membrane Process in High-quality Reuse of Urban Sewage[J].China Water & Wastewater,2026,42(4):61-68.
城镇污水高品质回用中双膜工艺的设计要点
- Title:
- Design Points of Double-membrane Process in High-quality Reuse of Urban Sewage
- Keywords:
- urban sewage; double-membrane process; high-quality reuse; ultrafiltration; reverse osmosis
- 摘要:
- 在推进污水资源化利用的背景下,以“超滤+反渗透”为核心的双膜工艺广泛应用于城镇污水高品质回用领域。结合城镇污水有机物、无机物(氮、磷)、微生物等污染物浓度较高的特点,分别从前处理工段、超滤处理工段、反渗透处理工段、超滤及反渗透浓废水处理等方面总结了设计要点。前处理工段宜设置介质过滤单元降低悬浮物、铁、锰等无机污染,同时强化杀菌减缓微生物污染;超滤处理工段的过滤通量取值不宜过高,给水泵扬程应根据最低温度下的最大跨膜压差确定,以保证冬季低温下超滤工段的过滤水量;反渗透工段应采用抗污染型膜元件应对有机污染,以一级两段式结构实现70%~80%的目标水回收率,运行过程中通过加酸和投加阻垢剂的方式控制碳酸钙等难溶盐结垢;双膜工艺产生的浓废水回流至前处理工段进行循环处理时,需复核生化处理和深度处理单元的处理能力,并应考虑浓水循环后盐分浓度增加对生化系统和反渗透工段的影响。
- Abstract:
- In the context of promoting the resource utilization of sewage, the double-membrane process centered on “ultrafiltration + reverse osmosis” has been widely applied in the field of high-quality reuse of urban sewage. Combining the water quality characteristics of high concentrations of organic matter, inorganic substances (nitrogen, phosphorus), and microorganisms in urban sewage, the design key points are summarized from the aspects of pretreatment, ultrafiltration, reverse osmosis, and the treatment of concentrated wastewater generated by ultrafiltration and reverse osmosis, providing a reference for similar engineering designs. The pretreatment section should be equipped with media filtration units to reduce inorganic pollutants such as SS, iron and manganese, while enhancing sterilization to mitigate microbial contamination. The design average flux of the ultrafiltration section should not be set too high, and the head of the feed pump should be determined based on the maximum transmembrane pressure difference at the lowest temperature, so as to ensure the filtration capacity of the ultrafiltration section during cold winter periods. The reverse osmosis section should employ anti-pollution membrane elements to cope with organic pollution, and adopt an one-stage two-section configuration to achieve a target water recovery rate of 70% to 80%. During operation, the formation of insoluble salts such as calcium carbonate is controlled by acid dosing and scale inhibitor addition. When the concentrated wastewater produced by the double-membrane process is recycled back to the pretreatment section for cyclic treatment, the treatment capacity of the biochemical and advanced treatment units must be re-evaluated, and the impact of increased salinity due to concentrate recycling on both the biochemical system and the reverse osmosis section should be taken into account.
相似文献/References:
[1]龚本洲,周炯,刘石虎,等.C/N值对短时曝气SBR高标准脱氮除磷效能的影响[J].中国给水排水,2020,36(15):13.
LIU Shi-hu,WANG Jia-le,ZHOU Jian.Effect of C/N Ratio on High-standard Nitrogen and Phosphorus Removal Efficiency of SBR with Short-time Aeration[J].China Water & Wastewater,2020,36(4):13.
[2]刘双柳,徐顺青,陈鹏,等.城镇污水治理设施补短板现状及对策[J].中国给水排水,2020,36(22):54.
LIU Shuang-liu,XU Shun-qing,CHEN Peng,et al.Current Situation and Countermeasures of Municipal Wastewater Treatment Facilities to Strengthen the Weak Points[J].China Water & Wastewater,2020,36(4):54.
[3]李惠平,庞维海,谢丽,等.低C/N污水处理过程中有机碳源的特性及转化分析[J].中国给水排水,2022,38(7):69.
LIHui-ping,PANGWei-hai,XIELi,et al.Characteristics and Conversion of Organic Carbon Sources during Treatment of Municipal Wastewater with Low Carbon to Nitrogen Ratio[J].China Water & Wastewater,2022,38(4):69.
[4]李超,鲁梅,刘绪为,等.提质增效背景下水质水量平衡简易测算与实践[J].中国给水排水,2022,38(16):129.
LI Chao,LUMei,LIUXu-wei,et al.Simple Calculation and Practice of Water Quality and Quantity Balance for Improving Quality and Efficiency[J].China Water & Wastewater,2022,38(4):129.
[5]陈寿彬.超滤-纳滤双膜工艺处理乌龙江段周期性咸潮水中试[J].中国给水排水,2024,40(11):24.
CHENShou-bin.Pilot Study on Double Membrane Process in Water Polluted by Periodic Salt Tides in Wulong River Section[J].China Water & Wastewater,2024,40(4):24.
[6]桂衍武,王阿华,李勇,等.城镇污水处理提质增效推进的江苏经验[J].中国给水排水,2024,40(12):35.
GUIYan-wu,WANGA-hua,LIYong,et al.Thinking and Practice of Improving Quality and Efficiency of Sewage Treatment in Jiangsu Province[J].China Water & Wastewater,2024,40(4):35.
[7]赵钰莹,李倍莹,黄依锟,等.城镇污水高速率短程硝化厌氧氨氧化脱氮[J].中国给水排水,2024,40(13):1.
ZHAOYu-ying,LIBei-ying,HUANGYi-kun,et al.High-rate Nitrogen Removal from Urban Wastewater Using Nitritation and Anaerobic Ammonium Oxidation[J].China Water & Wastewater,2024,40(4):1.
[8]孙广东,徐丽丽,芮文武,等.城镇污水处理提质增效中的管网普查[J].中国给水排水,2024,40(18):118.
SUNGuang-dong,XULi-li,RUIWen-wu,et al.Application and Enlightenment of General Pipe Network Survey in Improving Quality and Efficiency of Urban Sewage Treatment[J].China Water & Wastewater,2024,40(4):118.
[9]林书轩,刘轶,李志刚,等.碳源形态与分布对脱氮除磷效能及功能菌群的影响[J].中国给水排水,2025,41(7):8.
LINShu-xuan,LIUYi,LIZhi-gang,et al.Impact of Carbon Source Form and Distribution on Nitrogen and Phosphorus Removal Efficiency and Functional Microbial Communities[J].China Water & Wastewater,2025,41(4):8.