The effects of coagulation with MF/UF membrane filtration in drinking water treatment

2010 ◽  
Vol 19 (1-3) ◽  
pp. 138-145 ◽  
Author(s):  
H. N. Jang ◽  
D. S. Lee ◽  
S. O. Ko
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Filtration ◽  
Drinking Water Treatment

scholarly journals Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 643
Author(s):  
Hongjian Yu ◽  
Weipeng Huang ◽  
Huachen Liu ◽  
Tian Li ◽  
Nianping Chi ◽  
...  
Keyword(s):  
Shear Stress ◽  
Drinking Water ◽  
Water Treatment ◽  
Membrane Fouling ◽  
Membrane Filtration ◽  
Drinking Water Treatment ◽  
Permeate Flux ◽  
Organic Removal ◽  
Cake Layer ◽  
The Impact

The combination of conventional and advanced water treatment is now widely used in drinking water treatment. However, membrane fouling is still the main obstacle to extend its application. In this study, the impact of the combination of coagulation and ultrafiltration (UF) membrane rotation on both fouling control and organic removal of macro (sodium alginate, SA) and micro organic matters (tannic acid, TA) was studied comprehensively to evaluate its applicability in drinking water treatment. The results indicated that membrane rotation could generate shear stress and vortex, thus effectively reducing membrane fouling of both SA and TA solutions, especially for macro SA organics. With additional coagulation, the membrane fouling could be further reduced through the aggregation of mediate and macro organic substances into flocs and elimination by membrane retention. For example, with the membrane rotation speed of 60 r/min, the permeate flux increased by 90% and the organic removal by 35% in SA solution, with 40 mg/L coagulant dosage, with an additional 70% increase of flux and 5% increment of organic removal to 80% obtained. However, too much shear stress could intensify the potential of fiber breakage at the potting, destroying the flocs and resulting in the reduction of permeate flux and deterioration of effluent quality. Finally, the combination of coagulation and membrane rotation would lead to the shaking of the cake layer, which is beneficial for fouling mitigation and prolongation of membrane filtration lifetime. This study provides useful information on applying the combined process of conventional coagulation and the hydrodynamic shear force for drinking water treatment, which can be further explored in the future.

Do membrane filtration systems in drinking water treatment plants release nano/microplastics?

2021 ◽  
Vol 755 ◽  
pp. 142658
Author(s):  
Haojie Ding ◽  
Jian Zhang ◽  
Huan He ◽  
Ying Zhu ◽  
Dionysios D. Dionysiou ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Filtration ◽  
Drinking Water Treatment ◽  
Water Treatment Plants

Bacterial growth in batch-operated membrane filtration systems for drinking water treatment

2015 ◽  
Vol 156 ◽  
pp. 165-174 ◽  
Author(s):  
Joao Mimoso ◽  
Wouter Pronk ◽  
Eberhard Morgenroth ◽  
Frederik Hammes
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Bacterial Growth ◽  
Membrane Filtration ◽  
Drinking Water Treatment

Ceramic membranes for direct river water treatment applying coagulation and microfiltration

2006 ◽  
Vol 6 (4) ◽  
pp. 89-98 ◽  
Author(s):  
A. Loi-Brügger ◽  
S. Panglisch ◽  
P. Buchta ◽  
K. Hattori ◽  
H. Yonekawa ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Pilot Study ◽  
River Water ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Drinking Water Treatment ◽  
Ceramic Membranes ◽  
Operating Conditions ◽  
Optimum Operating

A new ceramic membrane has been designed by NGK Insulators Ltd., Japan, to compete in the drinking water treatment market. The IWW Water Centre, Germany, investigated the operational performance and economical feasibility of this ceramic membrane in a one year pilot study of direct river water treatment with the hybrid process of coagulation and microfiltration. The aim of this study was to investigate flux, recovery, and DOC retention performance and to determine optimum operating conditions of NGK's ceramic membrane filtration system with special regards to economical aspects. Temporarily, the performance of the ceramic membrane was challenged under adverse conditions. During pilot plant operation river water with turbidities between 3 and 100 FNU was treated. Membrane flux was increased stepwise from 80–300 l/m2h resulting in recoveries between 95.9 and 98.9%. A DOC removal between about 20–35% was achieved. The pilot study and the subsequent economical evaluation showed the potential to provide a reliable and cost competitive process option for water treatment. The robustness of the ceramic membrane filtration process makes it attractive for a broad range of water treatment applications and, due to low maintenance requirements, also suitable for drinking water treatment in developing countries.

State of the art in drinking water treatment by MF/UF in Germany—a survey among MF/UF plants

2008 ◽  
Vol 8 (4) ◽  
pp. 377-381 ◽  
Author(s):  
P. Lipp
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Membrane Filtration ◽  
State Of The Art ◽  
Drinking Water Treatment ◽  
Practical Experience ◽  
Research Project ◽  
Technical Data ◽  
Different Origin

Membrane filtration is increasingly used for treatment in drinking water supply in Germany. MF and UF are applied processes to remove particles from raw waters of different origin. In the frame of a research project founded by the German Gas-and Waterworks Association (DVGW), a survey has been undertaken among a number of 83 plants that were put into operation until the end of 2006. The aim of the project was to gather technical data and practical experience in a database which should help in the design of future MF/UF plants. In the present paper the most important outcome of this project will be described.

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