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(11):24-30.
Pilot Study on Double Membrane Process in Water Polluted by Periodic Salt Tides in Wulong River Section
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第11期
Page:
24-30
Column:
Date of publication:
2024-06-01
- Abstract:
- Aiming at the phenomenon of periodic salt tide pollution in the Wulong River section under the influence of seawater backflow, the pilot study was conducted to investigate the practical operation adaptability of the double membrane process under the condition of periodic salt tide pollution, and to explore the actual membrane fouling situation. The results showed that the double membrane process had a strong ability to remove pollutants and ensure the safety of effluent when the water was polluted by periodic salt tides. When the raw water quality reached the maximum turbidity of 310 NTU, the conductivity of 5 960 μS/cm, the Cl- concentration of 1 987 mg/L, and SO42- concentration of 327 mg/L, the conventional water quality indexes still reached the standard, and the turbidity of the effluent remained below 0.1 NTU. The removal rate of conductivity reached 98.96%, and the removal rate of Cl- and SO42- could reach 99.32% and 99.89% respectively, which were relatively stable in the long-term operation process. Other ion indexes like Fe2+, Mn2+ and F- could be effectively removed, with the average removal rates reaching 97.55%, 99.60% and 97.68%, respectively. All microbial indexes were not detected in effluent. The membrane fouling was mainly caused by cake layer fouling. The polluted substances accumulated on the membrane surface to form filter cake and block part of membrane holes.
Last Update:
2024-06-01