ZHENG Li-xiang,GUO Zhong-quan,MAO Wei-dong.Influence of Polyaluminium Chloride Residue on Ultrafiltration Membrane Fouling in Mine Water Treatment[J].China Water & Wastewater,2021,37(1 1):51-56.
Influence of Polyaluminium Chloride Residue on Ultrafiltration Membrane Fouling in Mine Water Treatment
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
1 1
Page:
51-56
Column:
Date of publication:
2021-01-01
- Abstract:
- Aiming at fouling of the ultrafiltration membrane caused by polyaluminium chloride (PAC) residue added in the process of mine water coagulation treatment, different amounts of PAC were added in front of polyvinylidene fluoride (PVDF) ultrafiltration membrane to carry out coagulation and ultrafiltration tests to treat mine water, and the relationships among turbidity, SDI, residual aluminum content, transmembrane pressure (TMP), normalized membrane specific flux(NSF) and their effects on ultrafiltration membranes were investigated under different PAC dosages. When PAC dosage was 35-40 mg/L, the minimum SDI in the supernatant was 5.3, the residual aluminum content was 0.16-0.23 mg/L, and the turbidity was 6.0-8.0 NTU. The TMP value increased with the increase of PAC dosage, residual aluminum content and pH value. When PAC dosage was 40 mg/L, the residual aluminum content was 0.18 mg/L, the pH value was 4.2-5.2, the minimum TMP was 64.8-68.4 kPa. The morphology of residual aluminum in water could be converted to each other under different pH values, and the polymeric state and flocculent particle size also affected the membrane fouling. Therefore, acid condition (pH of 4.2-5.2) was more helpful to reduce the pollution of residual aluminum to ultrafiltration membrane.
Last Update:
2021-01-01