Pre-treatment with nanofiltration (NF) in seawater desalination—Preliminary integrated membrane tests in Urla, Turkey

Kaya, Cüneyt; Sert, Gökhan; Kabay, Nalan; Arda, Müşerref; Yüksel, Mithat; Egemen, Özdemir

doi:10.1016/j.desal.2015.04.029

Cited by 96 publications

(27 citation statements)

References 19 publications

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“…They reported that rejection percent of Total Dissolved Solids was 76.2% in the hybrid process, which is relatively similar to the present study, measured as 76.52% [19]. Another research was done by Kaya et al, [35] regarding treatment and desalination of offshore waters of Ezmir using Membrane processes, applying Nanofiltration membrane as reverse Osmosis pretreatment under 30 and 40 bar pressures. The authors understood that average rejection percent of salinity, TDS, EC and Na and Cl ions in hybrid process was augmented from 30 bar to 40 bar, under higher pressure.…”

Section: Discussionsupporting

confidence: 87%

An investigation of desalination by nanofiltration, reverse osmosis and integrated (hybrid NF/RO) membranes employed in brackish water treatment

Talaeipour

Nouri

Hassani

et al. 2017

J Environ Health Sci Engineer

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BackgroundAs an appropriate tool, membrane process is used for desalination of brackish water, in the production of drinking water. The present study aims to investigate desalination processes of brackish water of Qom Province in Iran.MethodsThis study was carried out at the central laboratory of Water and Wastewater Company of the studied area. To this aim, membrane processes, including nanofiltration (NF) and reverse osmosis (RO), separately and also their hybrid process were applied. Moreover, water physical and chemical parameters, including salinity, total dissolved solids (TDS), electric conductivity (EC), Na+1 and Cl−1 were also measured. Afterward, the rejection percent of each parameter was investigated and compared using nanofiltration and reverse osmosis separately and also by their hybrid process. The treatment process was performed by Luna domestic desalination device, which its membrane was replaced by two NF90 and TW30 membranes for nanofiltration and reverse osmosis processes, respectively. All collected brackish water samples were fed through membranes NF90-2540, TW30-1821-100(RO) and Hybrid (NF/RO) which were installed on desalination household scale pilot (Luna water 100GPD). Then, to study the effects of pressure on permeable quality of membranes, the simulation software model ROSA was applied.ResultsResults showed that percent of the salinity rejection was recorded as 50.21%; 72.82 and 78.56% in NF, RO and hybrid processes, respectively. During the study, in order to simulate the performance of nanofiltartion, reverse osmosis and hybrid by pressure drive, reverse osmosis system analysis (ROSA) model was applied. The experiments were conducted at performance three methods of desalination to remove physic-chemical parameters as percentage of rejections in the pilot plant are: in the NF system the salinity 50.21, TDS 43.41, EC 43.62, Cl 21.1, Na 36.15, and in the RO membrane the salinity 72.02, TDS 60.26, EC 60.33, Cl 43.08, Na 54.41. Also in case of the rejection in hybrid system of those parameters and ions included salinity 78.65, TDS 76.52, EC 76.42, Cl 63.95, and Na 70.91.ConclusionsComparing rejection percent in three above-mentioned methods, it could be concluded that, in reverse osmosis process, ions and non-ion parameters rejection ability were rather better than nanofiltration process, and also better in hybrid compared to reverse osmosis process.The results reported in this paper indicate that the integration of membrane nanofiltration with reverse osmosis (hybrid NF/RO) can be completed by each other probably to remove salinity, TDS, EC, Cl, and Na.

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Section: Discussionsupporting

confidence: 87%

An investigation of desalination by nanofiltration, reverse osmosis and integrated (hybrid NF/RO) membranes employed in brackish water treatment

Talaeipour

Nouri

Hassani

et al. 2017

J Environ Health Sci Engineer

View full text Add to dashboard Cite

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“…7, in practical applications, combination of different pretreatment technologies is usually adopted to ensure the best RO performance (Farin and Luis, 2007;Kaya et al, 2015). For instance, Zhang at al.…”

Section: Pretreatment Technologiesmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

759

362

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Reverse osmosis (RO) membrane technology is one of the most important technologies for water treatment. However, membrane fouling is an inevitable issue. Membrane fouling leads to higher operating pressure, flux decline, frequent chemical cleaning and shorter membrane life. This paper reviews membrane fouling types and fouling control strategies, with a focus on the latest developments. The fundamentals of fouling are discussed in detail, including biofouling, organic fouling, inorganic fouling and colloidal fouling. Furthermore, fouling mitigation technologies are also discussed comprehensively. Pretreatment is widely used in practice to reduce the burden for the following RO operation while real time monitoring of RO has the advantage and potential of providing support for effective and efficient cleaning. Surface modification could slow down membrane fouling by changing surface properties such as surface smoothness and hydrophilicity, while novel membrane materials and synthesis processes build a promising future for the next generation of RO membranes with big advancements in fouling resistance. Especially in this review paper, statistical analysis is conducted where appropriate to reveal the research interests in RO fouling and control.Graphic Abstract

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“…Kaya et al . () studied the applicability of NF in the pretreatment stage of RO process for seawater desalination, and they found permeate recovery values of integrated system combinations depicted similar trend with permeate flux. Regarding permeate quality, it was seen that all integrated system combinations were better than single RO membrane.…”

Section: Introductionmentioning

confidence: 99%

Investigation on two integrated membrane systems for the reuse of electroplating wastewater

Zhu

Jin

Liu

2017

Water & Environment J

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A pilot study was done on a nanofiltration (NF)‐reverse osmosis (RO) and RO‐NF integrated membrane system about the feasibility of membrane for electroplating rinse wastewater treatment in concentrate stage configuration. Nickel sulphate solution was used as a synthetic wastewater. Water recovery, metal rejection and specific entropy production (SEP) were investigated under different operation pressure, feed temperature and feed concentration. The results showed water recovery of RO‐NF system was more than 10% higher than NF‐RO system but the SEP was 14.47% lower than NF‐RO system. The detailed analysis on economic cost and environmental impact of two systems was conducted based on a certain operation condition. Results indicated that the cost of RO‐NF system was 0.46 $/m3, which was lower than NF‐RO system, and the prevention cost of RO‐NF system was 11.46% lower than NF‐RO system. Generally, RO‐NF system was better than NF‐RO system.

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Pre-treatment with nanofiltration (NF) in seawater desalination—Preliminary integrated membrane tests in Urla, Turkey

Cited by 96 publications

References 19 publications

An investigation of desalination by nanofiltration, reverse osmosis and integrated (hybrid NF/RO) membranes employed in brackish water treatment

An investigation of desalination by nanofiltration, reverse osmosis and integrated (hybrid NF/RO) membranes employed in brackish water treatment

A review of reverse osmosis membrane fouling and control strategies

Investigation on two integrated membrane systems for the reuse of electroplating wastewater

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