Influences of polysilicic acid in Al13 species on floc properties and membrane fouling in coagulation/ultrafiltration hybrid process

2012 ◽  
Vol 181-182 ◽  
pp. 407-415 ◽  
Author(s):  
Weiying Xu ◽  
Baoyu Gao ◽  
Yan Wang ◽  
Qin Zhang ◽  
Qinyan Yue
Keyword(s):  
Membrane Fouling ◽  
Hybrid Process ◽  
Polysilicic Acid ◽  
Floc Properties ◽  
Al13 Species

Floc properties and membrane fouling of polyferric silicate chloride and polyferric chloride: the role of polysilicic acid

2014 ◽  
Vol 22 (6) ◽  
pp. 4566-4574 ◽  
Author(s):  
Hongyu Dong ◽  
Baoyu Gao ◽  
Qinyan Yue ◽  
Shenglei Sun ◽  
Yan Wang ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Polysilicic Acid ◽  
Floc Properties

Effect of pH on floc properties and membrane fouling in coagulation–ultrafiltration hybrid process with different Al-based coagulants

2016 ◽  
Vol 57 (54) ◽  
pp. 26041-26049 ◽  
Author(s):  
Ruiqi Feng ◽  
Qinyan Yue ◽  
Baoyu Gao ◽  
Lijuan Feng ◽  
Wenyu Wang ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Hybrid Process ◽  
Effect Of Ph ◽  
Floc Properties

Effects of magnetization on Fe(iii) species in magnetically enhanced coagulation ultrafiltration processes

RSC Advances ◽  
2016 ◽  
Vol 6 (87) ◽  
pp. 84397-84405 ◽  
Author(s):  
Jie Wang ◽  
Sasa Yang ◽  
Hui Jia ◽  
Hongwei Zhang
Keyword(s):  
Water Treatment ◽  
Membrane Fouling ◽  
Polluted Water ◽  
Enhanced Coagulation ◽  
Floc Properties

The effects of magnetization on floc properties and membrane fouling in magnetically enhanced coagulation ultrafiltration (MEC-UF) processes for micro-polluted water treatment were investigated in this study.

scholarly journals Coagulation/flocculation prior to low pressure membranes in drinking water treatment: a review

2020 ◽  
Vol 6 (11) ◽  
pp. 2993-3023
Author(s):  
Tyler A. Malkoske ◽  
Pierre R. Bérubé ◽  
Robert C. Andrews
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Fouling ◽  
Drinking Water Treatment ◽  
Low Pressure ◽  
Floc Properties ◽  
The Impact

Coagulation/flocculation has been grouped into three typical configurations and the impact of each examined in terms of floc properties and membrane fouling.

Pretreatment Process of Nanofiltration for Silting Density Index Reduction in Drinking Water Treatment System

2013 ◽  
Vol 777 ◽  
pp. 467-471 ◽  
Author(s):  
Liang Wang ◽  
Ying Chun Li ◽  
He Zhao ◽  
Zhao Hui Zhang ◽  
Bin Zhao ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Fouling ◽  
Sodium Dodecyl ◽  
Drinking Water Treatment ◽  
Hybrid Process ◽  
Transmembrane Pressure ◽  
Sand Filtration ◽  
Density Index ◽  
One Year

Calcium ions, magnesium ions, and silicate were the main reasons for the high silting density index (SDI) of natural waters. Therefore, they posed serious membrane fouling problems in the nanofiltration (NF) system, which restricted the wide application of this excellent drinking water treatment technology. In this study, the sand filtration and the micro-flocculation/sand filtration hybrid process were investigated as the pretreatment process of NF for SDI reduction. Compared with the sand filtration, the hybrid process of micro-flocculation/sand filtration was more effective for SDI reduction. When polyaluminium chloride (PAC) was used as the flocculant at a dose of 10 mg/L and the filtration rate of the sand filter was controlled at 10 m/h, the SDI value in the effluent of the pretreatment process maintained below 3. As a result, the subsequent NF system stably ran for one year. 68% CODMn was removal by NF. The membrane fouling during the operation was quite slight as the transmembrane pressure (TMP) increased by 17% after one-year use. Chemical cleaning with sodium tripolyphosphate (2%) and sodium dodecyl benzene sulfonate (0.25%) at 6 months interval could effectively recover the flux loss of the NF membrane.

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