YUHai-kuan,LIXing,ZHOUZhi-wei,et al.Pollutants Removal Efficiency of Pretreatment Process and Its Membrane Fouling Behaviors in a Large-scale Ultrafiltration Water Treatment Plant[J].China Water & Wastewater,2023,39(13):54-59.
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Pollutants Removal Efficiency of Pretreatment Process and Its Membrane Fouling Behaviors in a Large-scale Ultrafiltration Water Treatment Plant

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第13期 Page: 54-59 Column: Date of publication: 2023-07-01
Author(s):
YU　Hai-kuan1; 2;  LI　Xing1;  ZHOU　Zhi-wei1;  XU　Hai-yang1; 3;  LI　Dong-lai4;  TIAN　Xi-bin4
（1. Faculty of Architecture， Civil And Transportation Engineering， Beijing University of Technology， Beijing 100124， China； 2. Logistics University of PAP， Tianjin 300309， China； 3. Qingdao Transportation Planning and Design Institute Co. Ltd.， Qingdao 266000， China； 4. Dongying Waterworks Company， Dongying 257091， China）
Keywords:
ultrafiltration;  pretreatment process;  pollutants removal efficiency;  dissolved organic matter;  membrane fouling
Abstract:
The pretreatment process is the key link to improve the pollutants removal efficiency and control membrane fouling of combined ultrafiltration process, and plays an important role in practical engineering application. This paper compared the pollutants removal efficiency and membrane fouling behaviors of two pretreatment processes in a large-scale ultrafiltration water treatment plant during long-term operation. The conventional process combined with ultrafiltration process and the short process with carbon sludge reflux combined with ultrafiltration process both showed good organic matter removal performance. The organic matter in the effluent was mainly DOC with molecular weight (MW) less than 3 ku, and the effluent quality met the requirement specified in Standards for Drinking Water Quality (GB 5749-2006). Adding powdered activated carbon and setting sand filter unit in the pretreatment process effectively improved the water quality before membrane filtration, enhanced the stability of water quality, reduced membrane resistance, alleviated membrane fouling, and reduced the operating load of the subsequent ultrafiltration unit. The two pretreatment processes effectively removed the aromatic protein， aromatic protein Ⅱ, DOC with MW less than 1 ku, and the ultrafiltration unit was capable of removing humic acid, dissolved microbial metabolic protein and DOC with MW greater than 30 ku. DOC with MW less than 3 ku, aromatic protein and humic acid were the main factors causing membrane pore resistance, and DOC with MW in the ranges of >100 ku and 3-10 ku, aromatic protein, aromatic protein Ⅱ and dissolved microbial metabolic proteins were the main factors causing cake layer resistance.
Last Update: 2023-07-01