Membrane Fouling and Rejection of Organics during Algae-Laden Water Treatment Using Ultrafiltration: A Comparison between in Situ Pretreatment with Fe(II)/Persulfate and Ozone

2018 ◽  
Vol 52 (2) ◽  
pp. 765-774 ◽  
Author(s):  
Bin Liu ◽  
Fangshu Qu ◽  
Huarong Yu ◽  
Jiayu Tian ◽  
Wei Chen ◽  
...  
Keyword(s):  
Water Treatment ◽  
Membrane Fouling

Effect of in-situ ozonation on ceramic UF membrane fouling mitigation in algal-rich water treatment

2016 ◽  
Vol 498 ◽  
pp. 116-124 ◽  
Author(s):  
Dequan Wei ◽  
Yi Tao ◽  
Zhenghua Zhang ◽  
Lingjing Liu ◽  
Xihui Zhang
Keyword(s):  
Water Treatment ◽  
Membrane Fouling ◽  
Fouling Mitigation

In situ ozonation to control ceramic membrane fouling in drinking water treatment

Desalination ◽  
2013 ◽  
Vol 328 ◽  
pp. 1-7 ◽  
Author(s):  
Xihui Zhang ◽  
Jianning Guo ◽  
Lingyun Wang ◽  
Jiangyong Hu ◽  
Jia Zhu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Fouling ◽  
Ceramic Membrane ◽  
Drinking Water Treatment

The membrane fouling simulator: a suitable tool for prediction and characterisation of membrane fouling

2007 ◽  
Vol 55 (8-9) ◽  
pp. 197-205 ◽  
Author(s):  
J.S. Vrouwenvelder ◽  
S.M. Bakker ◽  
M. Cauchard ◽  
R. Le Grand ◽  
M. Apacandié ◽  
...  
Keyword(s):  
Water Treatment ◽  
Pressure Drop ◽  
Membrane Fouling ◽  
Full Scale ◽  
Simple System ◽  
Comparison Study ◽  
Non Destructive ◽  
Membrane Sheet ◽  
Spiral Wound

A new tool–the Membrane Fouling Simulator (MFS) – is developed to measure membrane fouling (pressure drop increase) in a small and simple system, representative for spiral wound membranes applied in water treatment. With the MFS, fouling development can be monitored systematically by (i) pressure drop, (ii) in situ and non-destructive (visual) observations using the sight glass and (iii) analysis of coupons sampled from the membrane sheet in the MFS. A comparison study of the MFS with spiral wound membrane elements (test rigs and a full scale installation) showed the same fouling. The MFS provided reproducible data. The small size and low water and chemical use of the MFS facilitate to perform systematic parallel studies. With the MFS, fouling of membranes applied in water treatment can be characterised.

A rapid small scale evaluation of ultrafiltration performance for surface water treatment at Alcantarilha's water treatment works (Algarve, Portugal)

2004 ◽  
Vol 4 (5-6) ◽  
pp. 199-206
Author(s):  
M. Ribau Teixeira ◽  
H. Lucas ◽  
M.J. Rosa
Keyword(s):  
Water Treatment ◽  
Membrane Fouling ◽  
Conventional Treatment ◽  
Apparent Molecular Weight ◽  
Small Scale ◽  
Hydraulic Permeability ◽  
Scale Evaluation ◽  
Surface Water Treatment ◽  
Drinking Water Production ◽  
Pre Treatment

A rapid small-scale evaluation of ultrafiltration (UF) performance with and without physical–chemical pre-treatment was performed to up-grade the conventional treatment used for drinking water production in Alcantarilha's water treatment works, Algarve, Portugal. Direct UF and pre-ozonation/coagulation/flocculation/sedimentation/UF (O/C/F/S/UF) were evaluated using polysulphone membranes of different apparent molecular weight cut-off (MWCO) (15–47 kDa). The results indicated that (i) UF is an effective barrier against microorganisms, including virus larger than 80 nm; (ii) for surface waters with low to moderate SUVA values, direct UF performance is equivalent or better than the conventional treatment in terms of residual turbidity, while UV254 nm and TOC residuals require the use of O/C/F/S/UF; (iii) the permeate quality improves with the membrane apparent MWCO decrease, especially for the direct UF, although the conventional treatment performance is never reached using UF; (iv) membrane fouling and adsorption phenomena are more severe in direct UF than in O/C/F/S/UF sequence (pre-ozonation decreases the membrane foulants by decreasing their hydrophobicity) and these phenomena increase with the membrane hydraulic permeability and, particularly, with the membrane apparent MWCO.

The Vyredox and Nitredox Methods of in situ Treatment of Groundwater

1988 ◽  
Vol 20 (3) ◽  
pp. 149-163 ◽  
Author(s):  
Carol Braester ◽  
Rudolf Martinell
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Traditional Method ◽  
Treatment Method ◽  
Nitrate Treatment ◽  
The Past ◽  
The World ◽  
Nitrate And Nitrite ◽  
Iron And Manganese

Nearly one fifth of all water used in the world is obtained from groundwater. The protection of water has become a high priority goal. During the last decades pollution of water has become more and more severe. Today groundwater is more and more used in comparison with surface water. Recently we have seen accidents, which can pollute nearly all surface water very quickly. Generally the groundwater is easier to protect, as well as cheaper to purify, and above all it is of better quality than the surface water. During the past two decades, alternatives to the traditional method of treating the water in filters have been developed, that is in situ water treatment i.e. the VYREDOX and NITREDOX methods. The most common problem regarding groundwater is too high content of iron and manganese, which can be reduced with the VYREDOX method. In some areas today there are severe problems with pollution by hydrocarbons and nitrate as well, and with modification of the VYREDOX treatment method it is used for hydrocarbon and nitrate treatment as well. The method to reduce the nitrate and nitrite is known as the NITREDOX method.

scholarly journals Effect of Pre-Oxidation on Coagulation/Ceramic Membrane Treatment of Yangtze River Water

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 369
Author(s):  
Shengji Xia ◽  
Xinran Zhang ◽  
Yuanchen Zhao ◽  
Fibor J. Tan ◽  
Pan Li ◽  
...  
Keyword(s):  
Water Treatment ◽  
Membrane Fouling ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Membrane Separation ◽  
Membrane System ◽  
Coagulation System ◽  
Fouling Control ◽  
Filtration System ◽  
Membrane Treatment

The membrane separation process is being widely used in water treatment. It is very important to control membrane fouling in the process of water treatment. This study was conducted to evaluate the efficiency of a pre-oxidation-coagulation flat ceramic membrane filtration process using different oxidant types and dosages in water treatment and membrane fouling control. The results showed that under suitable concentration conditions, the effect on membrane fouling control of a NaClO pre-oxidation combined with a coagulation/ceramic membrane system was better than that of an O3 system. The oxidation process changed the structure of pollutants, reduced the pollution load and enhanced the coagulation process in a pre-oxidation-coagulation system as well. The influence of the oxidant on the filtration system was related to its oxidizability and other characteristics. NaClO and O3 performed more efficiently than KMnO4. NaClO was more conducive to the removal of DOC, and O3 was more conducive to the removal of UV254.

In Situ Polymerization of Polypyrrole and Polyaniline on the Surface of Magnetic Molybdenum Trioxide Nanoparticles: Implications for Water Treatment

2021 ◽  
Author(s):  
Sofia K. Fanourakis ◽  
Sharona Q. Barroga ◽  
Jem Valerie D. Perez ◽  
Lilin He ◽  
Debora F. Rodrigues
Keyword(s):  
Water Treatment ◽  
In Situ Polymerization ◽  
Molybdenum Trioxide

Coupling continuous sand filtration to ultrafiltration for drinking water treatment: Improved performance and membrane fouling control

2018 ◽  
Vol 567 ◽  
pp. 18-27 ◽  
Author(s):  
Yuanqing Guo ◽  
Langming Bai ◽  
Xiaobin Tang ◽  
Qiaojin Huang ◽  
Binghan Xie ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Fouling ◽  
Drinking Water Treatment ◽  
Sand Filtration ◽  
Fouling Control ◽  
Improved Performance

Flexible electro-responsive in-situ polymer acid doped polyaniline membranes for permeation enhancement and membrane fouling removal

2019 ◽  
Vol 578 ◽  
pp. 263-272 ◽  
Author(s):  
Li Li Xu ◽  
Salman Shahid ◽  
Darrell Alec Patterson ◽  
Emma Anna Carolina Emanuelsson
Keyword(s):  
Membrane Fouling ◽  
Permeation Enhancement ◽  
Doped Polyaniline
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