Novel molecular level insights into forward osmosis membrane fouling affected by reverse diffusion of draw solutions based on thermodynamic mechanisms

2020 ◽  
pp. 118815
Author(s):  
Jiaheng Teng ◽  
Hanmin Zhang ◽  
Chuyang Tang ◽  
Hongjun Lin
Keyword(s):  
Membrane Fouling ◽  
Molecular Level ◽  
Forward Osmosis

scholarly journals Treatment of shale gas drilling flowback fluids (SGDFs) by forward osmosis: Membrane fouling and mitigation

Desalination ◽  
2015 ◽  
Vol 366 ◽  
pp. 113-120 ◽  
Author(s):  
Gang Chen ◽  
Zhouwei Wang ◽  
Long D. Nghiem ◽  
Xue-Mei Li ◽  
Ming Xie ◽  
...  
Keyword(s):  
Shale Gas ◽  
Membrane Fouling ◽  
Forward Osmosis ◽  
Gas Drilling ◽  
Shale Gas Drilling

scholarly journals Application of forward osmosis in reusing the brackish concentrate produced in reverse osmosis plants with secondary treated wastewater as feed solution: a case study

2016 ◽  
Vol 6 (4) ◽  
pp. 533-543 ◽  
Author(s):  
W. D. Wang ◽  
M. Esparra ◽  
H. Liu ◽  
Y. F. Xie
Keyword(s):  
Reverse Osmosis ◽  
Membrane Fouling ◽  
Water Flux ◽  
Forward Osmosis ◽  
Pump Energy ◽  
Feed Solution ◽  
Disinfection Byproducts ◽  
Treated Wastewater ◽  
Membrane Flux ◽  
Flux Decline

This study evaluated the feasibility of forward osmosis (FO) in diluting and reusing the concentrate produced in a reverse osmosis (RO) plant in James City County, VA. Secondary treated wastewater (STW) was used as the feed solution. Findings indicated that pH had slight effects on the water flux of the FO membrane. As the concentration of total dissolved solids (TDS) in the concentrate was diluted from 12.5 to 1.0 g/L or the temperature in the STW decreased from 23 to 10 °C, the membrane flux decreased from 2.2 to 0.59 and 0.81 L/(m2 h), respectively. The FO membrane showed a good performance in the rejection of organic pollutants, with only a small part of the protein-like substances and disinfection byproducts permeating to the diluted concentrate. During an 89-hour continuous operation, water flux decline due to membrane fouling was not observed. Controlling the TDS in the second-stage FO effluent at 1.5 g/L, approximately 8.3% of the pump energy input could be saved. The consumption of groundwater was reduced from 22.7 × 103 to 10.6 × 103 m3/d. FO was proved to be an effective method in both diluting the discharged concentrate and reducing the energy consumption of RO.

Direct concentration of municipal sewage by forward osmosis and membrane fouling behavior

2018 ◽  
Vol 247 ◽  
pp. 730-735 ◽  
Author(s):  
Yue Gao ◽  
Zhou Fang ◽  
Peng Liang ◽  
Xia Huang
Keyword(s):  
Membrane Fouling ◽  
Forward Osmosis ◽  
Municipal Sewage

scholarly journals Zwitterion-Modified Ultrafiltration Membranes for Permian Basin Produced Water Pretreatment

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1710 ◽  
Author(s):  
Mirjalal Babayev ◽  
Hongbo Du ◽  
Venkata S. V. Botlaguduru ◽  
Raghava R. Kommalapati
Keyword(s):  
Membrane Fouling ◽  
Oil And Gas ◽  
Produced Water ◽  
Forward Osmosis ◽  
Dip Coating ◽  
Permeate Flux ◽  
Permian Basin ◽  
Water Pretreatment ◽  
Uf Membranes ◽  
Surface Modified

Unconventional oil and gas extraction generates large quantities of produced water (PW). Due to strict environmental regulations, it is important to recover and reuse PW. In this study, commercial polyethersulfone (PES) ultrafiltration (UF) membranes were surface-modified with zwitterionic polymer 3-(3,4-Dihydroxyphenyl)-l-alanine (l-DOPA) solution to alleviate membrane fouling during the ultrafiltration of shale oil PW of the Permian Basin. UF membranes were coated in l-DOPA solution by using a dip coating technique. Membrane characterization tests confirmed successful l-DOPA coating on UF membranes. While performing the experiments, permeate flux behaviors of the uncoated and coated membranes and antifouling resistance of the zwitterionic coating were evaluated. Among the coated UF membranes with varying coating times from one day to three days, the three-day coated UF membrane showed a good flux performance and the highest fouling resistance. The flux reduced by 38.4% for the uncoated membrane, while the reduction was 16% for the three-day coated membrane after the 5 h ultrafiltration of PW. Both improvements of the flux performance and recovery ratio are attributed to a negatively-charged surface developed on the membranes after the zwitterionic coating. The UF pretreatment also improved the flux behavior of the later forward osmosis (FO) process for PW treatment.

scholarly journals Strategies in Forward Osmosis Membrane Substrate Fabrication and Modification: A Review

Membranes ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 332 ◽  
Author(s):  
Nur Diyana Suzaimi ◽  
Pei Sean Goh ◽  
Ahmad Fauzi Ismail ◽  
Stanley Chinedu Mamah ◽  
Nik Ahmad Nizam Nik Malek ◽  
...  
Keyword(s):  
Water Treatment ◽  
Membrane Fouling ◽  
Forward Osmosis ◽  
Composite Membranes ◽  
High Energy ◽  
Future Perspective ◽  
Selective Layer ◽  
Long Duration ◽  
Selective Membrane ◽  
Separation Performances

Forward osmosis (FO) has been recognized as the preferred alternative membrane-based separation technology for conventional water treatment technologies due to its high energy efficiency and promising separation performances. FO has been widely explored in the fields of wastewater treatment, desalination, food industry and bio-products, and energy generation. The substrate of the typically used FO thin film composite membranes serves as a support for selective layer formation and can significantly affect the structural and physicochemical properties of the resultant selective layer. This signifies the importance of substrate exploration to fine-tune proper fabrication and modification in obtaining optimized substrate structure with regards to thickness, tortuosity, and porosity on the two sides. The ultimate goal of substrate modification is to obtain a thin and highly selective membrane with enhanced hydrophilicity, antifouling propensity, as well as long duration stability. This review focuses on the various strategies used for FO membrane substrate fabrication and modification. An overview of FO membranes is first presented. The extant strategies applied in FO membrane substrate fabrications and modifications in addition to efforts made to mitigate membrane fouling are extensively reviewed. Lastly, the future perspective regarding the strategies on different FO substrate layers in water treatment are highlighted.

scholarly journals Recent Progresses of Forward Osmosis Membranes Formulation and Design for Wastewater Treatment

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2043 ◽  
Author(s):  
Goh ◽  
Ismail ◽  
Ng ◽  
Abdullah
Keyword(s):  
Wastewater Treatment ◽  
Membrane Fouling ◽  
Energy Efficient ◽  
Potable Water ◽  
Forward Osmosis ◽  
Water Quality Standards ◽  
Separation Technology ◽  
Recent Developments ◽  
Treatment Technologies ◽  
Treatment Application

Production of potable water or reclaimed water with higher quality are in demand to address water scarcity issues as well as to meet the expectation of stringent water quality standards. Forward osmosis (FO) provides a highly promising platform for energy-efficient membrane-based separation technology. This emerging technology has been recognized as a potential and cost-competitive alternative for many conventional wastewater treatment technologies. Motivated by its advantages over existing wastewater treatment technologies, the interest of applying FO technology for wastewater treatment has increased significantly in recent years. This article focuses on the recent developments and innovations in FO for wastewater treatment. An overview of the potential of FO in various wastewater treatment application will be first presented. The contemporary strategies used in membrane designs and fabrications as well as the efforts made to address membrane fouling are comprehensively reviewed. Finally, the challenges and future outlook of FO for wastewater treatment are highlighted.

Forward osmosis desalination from laboratory to market

2015 ◽  
Vol 15 (4) ◽  
pp. 834-844 ◽  
Author(s):  
Ahmed Al-Zuhairi ◽  
Ali A. Merdaw ◽  
Sami Al-Aibi ◽  
Malak Hamdan ◽  
Peter Nicoll ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Pure Water ◽  
Specific Energy Consumption ◽  
Forward Osmosis ◽  
Feed Water ◽  
Flat Sheet ◽  
Osmotic Agent ◽  
Flat Sheet Membrane ◽  
The University ◽  
Sheet Membrane

A two-step forward osmosis (FO) desalination process combining both FO and reverse osmosis (RO) systems has been developed by the Centre for Osmosis Research and Applications at the University of Surrey and commercialised by Modern Water plc. In the FO + RO process seawater was used as feed water (FW) and a concentrated aqueous solution was used as a draw solution (DS). By taking advantage of natural osmosis, pure water is transferred from the FW to the DS and then recovered from the DS by the RO process utilising low resistance membranes, and hence lower specific energy consumption (SEC). This paper presents results of FO experiments conducted on flat sheet membrane using a bench-scale rig. The osmotic agent investigated in this study was magnesium sulphate, which is non-toxic, and highly soluble in water. Furthermore experiments were carried out on the RO pilot in order to regenerate the DS for reuse in the FO process and produce clean water. This paper also presents some pilot plant results and data from commercial plants in Oman and Gibraltar. The data demonstrates the efficiency of the FO + RO compared with the conventional RO process in terms of SEC and membrane fouling performance.

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