SUNYu,WANGYong-lei,SHENHu,et al.Optimization of Nanofiltration for Preparation of Direct Drinking Water Based on Microbubble Scale Inhibition[J].China Water & Wastewater,2025,41(3):43-49.
Optimization of Nanofiltration for Preparation of Direct Drinking Water Based on Microbubble Scale Inhibition
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第3期
Page:
43-49
Column:
Date of publication:
2025-02-01
- Keywords:
- nanofiltration membrane; direct drinking water; microbubble; operation optimization; scale inhibition effect
- Abstract:
- In light of the significant challenges associated with nanofiltration for producing high-quality direct drinking water, such as complex process parameters and membrane fouling, this study introduced the microbubble scale inhibition method to optimize the technological parameters and carried out a pilot test. The optimal operating conditions were as follows: the influent pH was 7.34, the influent pressure was 0.50 MPa, and the recovery rate was 13.501%. The pilot test results indicated that the nanofiltration achieved removal efficiencies exceeding 80% for conductivity and 50% for turbidity. The removal efficiencies for TOC and UV254 were in the ranges of 67% to 71% and 75% to 81%, respectively. Additionally, the rejection rate for bivalent ions surpassed 94%. Simultaneously, the scale inhibition effect of microbubbles could decrease the cleaning frequency of nanofiltration membranes, thereby preserving their integrity, extending their service life, and reducing the operational costs associated with pipeline direct drinking water treatment.
Last Update:
2025-02-01