SHENGZhong-xiang,GENGAn-chao,GENGCe,et al.Application of Non-submerged Ultrafiltration Technology in Wastewater Reuse and Treatment at Waterworks[J].China Water & Wastewater,2025,41(7):69-75.
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Application of Non-submerged Ultrafiltration Technology in Wastewater Reuse and Treatment at Waterworks

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第7期 Page: 69-75 Column: Date of publication: 2025-04-01
Author(s):
SHENG　Zhong-xiang1;  GENG　An-chao1;  GENG　Ce2;  LI　Xu2;  SHAN　Yi-ting2
（1. College of Ocean Science and Engineering， Shanghai Maritime University， Shanghai 201306， China； 2. Suzhou Mohai Water Service Technology Co. Ltd.， Suzhou 215000， China）
Keywords:
non-submerged ultrafiltration (NSUF) technology;  waterworks;  production wastewater;  reuse and treatment;  membrane flux
Abstract:
In this study, a non-submerged ultrafiltration (NSUF) technology was designed and developed to facilitate the reuse and treatment of production wastewater from waterworks, providing references for solving the issues associated with traditional ultrafiltration technology in treating such wastewater. The optimal operating parameters and cleaning protocols were identified by systematically investigating and optimizing the relationship between membrane flux and membrane fouling during operation. Compared with traditional spiral-wound membranes and tubular membranes, the effluent quality remained stable upon employing NSUF technology in a pilot test. The average turbidity removal rate reached 99%, with the effluent turbidity being less than 0.03 NTU. Various indicators of effluent were superior to the values specified in Standards for Drinking Water Quality (GB 5749-2022), and the average water production rate was as high as 98.5%. In addition, the surface morphology of the membrane was characterized by scanning electron microscope (SEM), revealing that the membrane fouling was relatively mild. The processing cost associated with NSUF technology was approximately 0.238 yuan/m3. Compared to production wastewater reuse and treatment technologies in conventional waterworks, the NSUF technology demonstrates higher treatment efficiency and lower operation and maintenance costs, making it a promising candidate for widespread adoption and application.
Last Update: 2025-04-01