Quantitative analysis of the irreversible membrane fouling of forward osmosis during wastewater reclamation: Correlation with the modified fouling index

2020 ◽  
Vol 597 ◽  
pp. 117757 ◽  
Author(s):  
Min Zhan ◽  
Gimun Gwak ◽  
David Inhyuk Kim ◽  
Kiho Park ◽  
Seungkwan Hong
Keyword(s):  
Quantitative Analysis ◽  
Membrane Fouling ◽  
Forward Osmosis ◽  
Wastewater Reclamation ◽  
Modified Fouling Index

scholarly journals Removal and Fouling Influence of Microplastics in Fertilizer Driven Forward Osmosis for Wastewater Reclamation

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 845
Author(s):  
Ziyan Wang ◽  
Keqiang Liu ◽  
Ya Gao ◽  
Guanhua Li ◽  
Zhenyu Li ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Energy Requirement ◽  
Forward Osmosis ◽  
Membrane System ◽  
Performance Comparison ◽  
Wastewater Reclamation ◽  
Negative Effects ◽  
Extracellular Polymers ◽  
High Quality ◽  
Comparison Results

Insufficient removal of microplastics (MPs) and nanoplastics (NPs) may exert negative effects on the environment and human health during wastewater reclamation. The fertilizer-driven forward osmosis (FDFO) is an emerging potential technology to generate high-quality water for irrigation of hydroponic systems. In this study, the removal of MPs/NPs by the FDFO process together with their impact on FDFO membrane fouling was investigated, due to FDFO’s low molecular weight cut-off and energy requirement by using fertilizer as draw solution. Plastic particles with two different sizes (100 nm and 1 μm) and extracellular polymers released by real wastewater bacteria were utilized as model compounds for FDFO performance comparison. Results show that FDFO membrane system could generate high-quality irrigation water with only fertilizer, completely removing extracellular polymers, MPs and NPs from wastewater. It was found that the MPs and NPs themselves do not cause a significant membrane fouling. Moreover, it could help to reduce the membrane fouling caused by extracellular substances. That is probably because MPs and NPs helped to form a loose and porous fouling layer. Therefore, the FDFO process could be a long-term stable (low fouling) process for the reclamation of wastewater with high-quality requirements.

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.

scholarly journals A feasibility study on UV pretreatment for microfiltration and reverse osmosis membrane processes in wastewater reclamation

2013 ◽  
Vol 3 (3) ◽  
pp. 260-267
Author(s):  
Ho-Young Jeong ◽  
Yoon-Jin Kim ◽  
Ji-Hee Han ◽  
Dong-Ha Kim ◽  
Jinsik Sohn ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Membrane Fouling ◽  
Treatment Options ◽  
Human Consumption ◽  
Feed Water ◽  
Reverse Osmosis Membrane ◽  
Wastewater Reclamation ◽  
Important Place ◽  
Quality Water ◽  
Small Footprint

Wastewater reclamation is where wastewater from various sources is purified so the water can be used by human consumption. Among many treatment options, membranes have gained an important place in wastewater reclamation. It allows the production of high quality water from wastewater, with a small footprint and affordable energy consumption. Nevertheless, membrane fouling is regarded as a serious problem due to the high fouling potential of wastewater. In this study, we applied ultraviolet (UV) processes as a pretreatment for membrane systems that are used for wastewater reclamation. Low pressure UV (LUV) and pulsed UV (PUV) were used to decompose or alter the organics in the feed water of the membranes. Effluent organic matter was characterized by total organic carbon (TOC) and UV absorbance (UVA). Also the effect of UV pretreatment on membrane fouling was investigated for microfiltration (MF) and reverse osmosis (RO) processes. The pretreatment of membranes using LUV or PUV was effective to control fouling of hollow fiber MF membranes. This is probably because of the reduction and modification of organics after UV treatments. However, the effect of UV pretreatment on RO flux was less significant, which is attributed to low fouling prophecy after MF treatment.

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

Influence of Organic Matters on Forward Osmosis Membrane Performance

2014 ◽  
Vol 535 ◽  
pp. 744-748
Author(s):  
Sheng Ji Xia ◽  
Yu Min Zhou ◽  
Jian Wei Chen ◽  
Rui Lin Yang ◽  
Xin Huan Zhang
Keyword(s):  
Alginic Acid ◽  
Water Flux ◽  
Forward Osmosis ◽  
Wastewater Reclamation ◽  
Ultrasonic Oscillation ◽  
Organic Matters ◽  
Membrane Performance ◽  
Potential Applications ◽  
Osmotic Pressure Gradient

Forward osmosis is an emerging membrane technology with potential applications in desalination and wastewater reclamation, osmotic pressure gradient cross the FO membrane is used to generate water flux. In contrast with conventional pressure-driving membrane process, the advantage of FO is significant: energy saving, high solute rejection and low fouling propensity. In this study, alginic acid (AA), boving serum albumin (BSA), humic acid (HA) and tannic acid (TA) were used to investigate the influence of organic fouling. The flux changed obviously, the rejection was approving and the absorption of organics was observed in the study. Ultrasonic oscillation was employed to wipe the organics off the fouling membranes, which was intend to study the quality of absorption of organic matters.

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