Pilot Study on Nanofiltration Seawater Softening for SWRO Desalination

2012 ◽  
Vol 550-553 ◽  
pp. 2178-2181 ◽  
Author(s):  
Bao Wei Su ◽  
Yu Hong Wang ◽  
Xue Li Gao
Keyword(s):  
Pilot Study ◽  
Reverse Osmosis ◽  
Membrane System ◽  
Water Shortage ◽  
Operating Conditions ◽  
Important Method ◽  
Surface Separation ◽  
The World ◽  
Seawater Reverse Osmosis ◽  
Pretreatment Technology

Seawater desalination has long been recognized as an important method for the solution of the world fresh water shortage, especially seawater Reverse Osmosis (SWRO) desalination. Recently the issue is again being raised for the newly developed pretreatment technology using nanofiltration (NF) membrane which has special separation properties owing to the charge characteristics of its surface separation layer. In this study, two kinds of commercial NF membrane have been studied in a pilot UF-NF Integrated Membrane System (IMS). Operating conditions was investigated and the results show that NF can be effectively used for the softening of seawater and provide excellent feed for SWRO.

scholarly journals Full-Scale Seawater Reverse Osmosis Desalination Plant Simulator

2020 ◽  
Author(s):  
Hammad Siddiqui ◽  
Mariam Elnour ◽  
Nader Meskin ◽  
Syed Zaidi
Keyword(s):  
Reverse Osmosis ◽  
Full Scale ◽  
Operating Conditions ◽  
Water Desalination ◽  
System Behavior ◽  
Desalination Plant ◽  
Local Plant ◽  
Seawater Reverse Osmosis ◽  
High Flexibility ◽  
Operational Data

Reverse Osmosis (RO) is an efficient and clean membrane-based technology for water desalination. This work presents a full-scale seawater reverse osmosis (SWRO) desalination plant simulator using MATLAB/Simulink that has been validated using the operational data from a local plant. It allows simulating the system behavior under different operating conditions with high flexibility and minimal cost.

scholarly journals Forward osmosis (FO)-reverse osmosis (RO) hybrid process incorporated with hollow fiber FO

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
S.-J. Im ◽  
S. Jeong ◽  
A. Jang
Keyword(s):  
Reverse Osmosis ◽  
Hollow Fiber ◽  
Forward Osmosis ◽  
High Energy ◽  
Operating Conditions ◽  
Energy Costs ◽  
High Dilution ◽  
Volume Production ◽  
Seawater Reverse Osmosis ◽  
High Energy Consumption

AbstractCurrently, desalination is limited by high energy consumption and high operational and maintenance costs. In this study, a new concept of a hollow fiber forward osmosis (HFFO)-based infinity desalination process with minor environmental impacts (free-energy intake and no pretreatment or brine discharge) is suggested. To evaluate the concept, an element-scale HFFO was conducted in both conventional FO and pressure-assisted FO modes, simulating a submerged HFFO operation. In the HFFO test, the impacts of several operating conditions on the performance of the HFFO were investigated to select the best case. Based on these results, the energy costs were calculated and compared with those of a hybrid FO–seawater reverse osmosis (SWRO) process. The HFFO showed a high dilution rate of the draw solution (up to approximately 400%), allowing the downstream SWRO process to operate at 25 bar with the same permeate volume production (recovery rate of 60%). Consequently, the HFFO-based infinity desalination process has an annual energy revenue of 183.83 million USD, compared with a stand-alone two-stage RO process based on a 100,000 m3/day plant.

scholarly journals Performance Assessment of SWRO Spiral-Wound Membrane Modules with Different Feed Spacer Dimensions

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 692 ◽  
Author(s):  
A. Ruiz-García ◽  
I. Nuez
Keyword(s):  
Reverse Osmosis ◽  
Pressure Vessels ◽  
Operating Conditions ◽  
Solute Permeability ◽  
Permeability Coefficients ◽  
Water Permeability Coefficient ◽  
Seawater Reverse Osmosis ◽  
Membrane Modules ◽  
The Impact ◽  
Spiral Wound

Reverse osmosis is the leading process in seawater desalination. However, it is still an energy intensive technology. Feed spacer geometry design is a key factor in reverse osmosis spiral wound membrane module performance. Correlations obtained from experimental work and computational fluid dynamics modeling were used in a computational tool to simulate the impact of different feed spacer geometries in seawater reverse osmosis spiral wound membrane modules with different permeability coefficients in pressure vessels with 6, 7 and 8 elements. The aim of this work was to carry out a comparative analysis of the effect of different feed spacer geometries in combination with the water and solute permeability coefficients on seawater reverse osmosis spiral wound membrane modules performance. The results showed a higher impact of feed spacer geometries in the membrane with the highest production (highest water permeability coefficient). It was also found that the impact of feed spacer geometry increased with the number of spiral wound membrane modules in series in the pressure vessel. Installation of different feed spacer geometries in reverse osmosis membranes depending on the operating conditions could improve the performance of seawater reverse osmosis systems in terms of energy consumption and permeate quality.

The Reverse Osmosis Membrane System Design for Freshwater Production

2011 ◽  
Vol 332-334 ◽  
pp. 1539-1544
Author(s):  
Yan Yue Lu ◽  
An Ping Liao ◽  
Yang Dong Hu
Keyword(s):  
Reverse Osmosis ◽  
Design Method ◽  
Membrane System ◽  
Optimization Method ◽  
Optimal Number ◽  
Operating Conditions ◽  
System Structure ◽  
Mixed Integer ◽  
Non Linear Programming ◽  
Minlp Problem

The reverse osmosis (RO) desalination process to make multiple freshwater from seawater has been studied in this work. The optimization method based on process synthesis has been applied to design the RO system. The optimum design problem can be formulated as a mixed-integer non-linear programming (MINLP) problem, which minimizes the total annualized cost of the RO system. The solution of the problem includes the optimal system structure and operating conditions, and the optimal streams distribution. The design method could also be used for the optimal selection of the types of membrane elements in each stages and the optimal number of membrane elements in each pressure vessel. The effectiveness of this design methodology has been demonstrated by solving a desalination case.

scholarly journals Introduction to desalination and microbial desalination cells

2021 ◽  
pp. 1-14
Author(s):  
Sergio Genaro Salinas-Rodríguez ◽  
Juan Arévalo ◽  
Juan Manuel Ortiz ◽  
Ángeles Mendoza-Sammet ◽  
Eduard Borràs-Camps ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Reverse Osmosis ◽  
Water Scarcity ◽  
Production Costs ◽  
Energy Costs ◽  
The Sustainable Development ◽  
The World ◽  
Seawater Reverse Osmosis ◽  
Development Goals ◽  
Key Innovations

Abstract This chapter presents desalination as one of the technologies to alleviate water scarcity and its contribution to the sustainable development goals. An overview of the world and regional desalination capacity is presented and areas where desalination has potential for development are identified. The overall concept of the microbial desalination cells is presented and the areas where key innovations were developed is presented. A discussion on the energy costs and production costs in seawater reverse osmosis is briefly discussed.

Kristal® 2000 PVDF hollow fiber UF membrane in the pretreatment for seawater desalination

2012 ◽  
Vol 7 (4) ◽  
Author(s):  
Zanguo Peng ◽  
Zhaoxuan Zhang ◽  
Pandurangan Mohan ◽  
Kasinathan Manimaran ◽  
Dongfei Li
Keyword(s):  
Water Quality ◽  
Pilot Study ◽  
Reverse Osmosis ◽  
Hollow Fiber ◽  
Large Scale ◽  
Operating Costs ◽  
Feed Water ◽  
Seawater Desalination ◽  
Seawater Reverse Osmosis ◽  
Uf Membranes

Membrane technology has emerged as a dominant solution to seawater desalination due to its superior advantages such as stable output water quality, lower energy consumption, ease of operation and smaller footprint. However, the design of spiral wound reverse osmosis (RO) membranes used in desalination does not allow for backwash or air scouring, thus rendering the RO membrane highly susceptible to fouling. Pretreatment for the RO system is therefore essential to ensure a long service life of the RO membranes. For waters containing suspended solids of up to 75 mg/L (such as that in the SingSpring Desalination Plant at Tuas, Singapore), conventional pretreatment methods (such as dissolved air floatation and filtration (DAFF), chemical dosing and cartridge filtration) require regular operator intervention to produce a permeate of reasonably quality. Ultrafiltration (UF) as a pretreatment for seawater desalination can offer better treated water, lower operating costs, a smaller footprint, and flexibility in dealing with poor or varying feed water quality. By improving the pretreatment permeate water quality, reducing operating costs and the footprint, capital expenses can be lowered. Greater stability is also achieved during times of poor or variable feed water conditions (such as periods of algalbloom). A pilot study was conducted at SingSpring to track the performance of Hyflux's Kristal® 2000 hollow fiber UF membranes as pretreatment for the seawater reverse osmosis (SWRO) system. The results of the pilot study will enable the design of future large-scale UF-SWRO membrane projects for seawater desalination.

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