MIN Rui,ZHANG Guo-zhen,WU Fu-ping,et al.Pre-ozone Enhanced Electro-flocculation-Ultrafiltration Process for the Treatment of Micro-polluted Cellar Water[J].China Water & Wastewater,2021,37(21 21):41-47.
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Pre-ozone Enhanced Electro-flocculation-Ultrafiltration Process for the Treatment of Micro-polluted Cellar Water

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 21 21 Page: 41-47 Column: Date of publication: 2021-11-01
Author(s):
MIN Rui1; 2; ZHANG Guo-zhen1; 2; WU Fu-ping1; 2; WANG Hong-wei3; WANG Meng-ru4; ZHOU Tian-hong1; 2; MOU Hai-sheng1; 2
(1. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070， China; 2. Key Laboratory of Yellow River Water Environment in Gansu Province， Lanzhou 730070, China; 3. Gansu Road Construction Group Management Co. Ltd., Lanzhou 730030， China; 4. Lanzhou Veolia Water Group Co. Ltd., Lanzhou 730070, China)
Keywords:
ultrafiltration; pre-ozone enhanced electro-flocculation; micro-polluted cellar water; membrane flux
Abstract:
In view of the current situated micro-pollution of cellar water in rural areas in Northwestern China, the pre-ozone enhanced electro-flocculation combined with ultrafiltration was applied to treat the micro-polluted cellar water in order to ensure the safety of the drinking water for the villagers, and the actual treatment effects of the ultrafiltration along, pre-ozone enhanced electro-flocculation along and their combined process on the micro-polluted cellar water were analyzed. Under the conditions as follows: ozone dosage of 3 mg/L, electrode spacing of 10 mm, current density of 26.76 A/m2 and electrolytic time of 15 min, the combined process had the highest removal efficiency of the pollutants. The removal efficiencies of CODMn, UV254 and NH3-N were increased from 20.96%,14.20% and 13.38% of the ultrafiltration and 58.38%, 79.59% and 53.91% of the pre-ozone enhanced electro-flocculation to 64.92%, 83.67% and 56.30%, respectively, and the effluent turbidity, CODMn, UV254 and NH3-N met the requirements of Standards for Drinking Water Quality (GB 5749-2006). The pre-ozone enhanced electro-flocculation had a high removal efficiency of the macro-molecular organics and turbidity in the raw water, which could effectively slow down the subsequent ultrafiltration membrane flux attenuation and prolong the service life of the membrane. The combined process is more suitable for the purification of the micro-polluted cellar water in the rural area.
Last Update: 2021-11-01