Effective new pretreatment for seawater reverse osmosis systems

Wilf, Mark; Klinko, Kenneth

doi:10.1016/s0011-9164(98)00127-1

Cited by 23 publications

(5 citation statements)

References 5 publications

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“…When γ decreases (less membrane capacity) or κ increases (more pressure drop), a higher recovery and a greater applied pressure are suggested in order to achieve the NSEC at its lowest attainable level. It is worth noting that the maximum recovery is limited by the ability to produce potable quality permeate in SWRO 33 and the occurrence of silica precipitation in BWRO. 34 From Figures 2, 3, and 4, one can read optimal operating conditions for typical BWRO and SWRO processes using representative values of γ and κ.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

A Unified Model-Based Analysis and Optimization of Specific Energy Consumption in BWRO and SWRO

2013

Ind. Eng. Chem. Res.

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A unified mathematical model is developed to describe both brackish water (BW) and seawater (SW) reverse osmosis (RO) desalination processes. The model contains two dimensionless parameters: κ, quantifying the effect of retentate pressure drop, and γ, reflecting the membrane capacity demand ratio. A γ vs. κ map derived from data obtained from RO desalination plants worldwide is used to show that BWRO and SWRO are in completely different regions. The minimization of specific energy consumption (SEC) is formulated and solved as a nonlinear optimization problem using representative values of γ and κ in both BWRO and SWRO. Several computational case studies are carried out to demonstrate the differences in operating BWRO and SWRO. Discussions are made on the effect of fractional recovery, RO configurations (single-stage, two-stage, and two-stage with booster pump) as well as brine recirculation on SEC.

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Section: ■ Results and Discussionmentioning

confidence: 99%

A Unified Model-Based Analysis and Optimization of Specific Energy Consumption in BWRO and SWRO

2013

Ind. Eng. Chem. Res.

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“…Other membrane suppliers which produce insideout UF membranes are Hydranautics, Inge and Aquasource. Their chlorine dose levels range from 5 mg/l every 30 minutes [119, for Aquasource] to 20-50 mg/l every 2-6 hours [92,93,112,[115][116][117], for Hydranautics, Inge] in pilot plants. Doses in full-scale plants are lower and less frequent with 20 mg/l every 8-24 hours [92][93][94].…”

Section: Integrated Membrane Systems (Ims)mentioning

confidence: 99%

Development of an Environmental Impact Assessment and Decision Support System for Seawater Desalination Plants

Lattemann¹

2010

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“…In order to compensate a reasonable demand of fresh water, the process of reverse osmosis (RO) is more suitable as compared to other processes . The investigation of the effects of operating parameters on the performance of seawater reverse osmosis has been carried out in numerous studies . The increased temperature of the seawater reduces the viscosity, which in turn improves the permeability of membrane.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16] The investigation of the effects of operating parameters on the performance of seawater reverse osmosis has been carried out in numerous studies. [27][28][29][30] The increased temperature of the seawater reduces the viscosity, which in turn improves the permeability of membrane. In desalination processes, the flow rate is inversely proportional to the salinity.…”

Section: Introductionmentioning

confidence: 99%

A novel renewable energy‐based integrated system with thermoelectric generators for a net‐zero energy house

2020

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Summary A renewable energy based integrated system is developed to meet the total energy demands of a house located off‐grid, and a thermodynamic analysis through energy and exergy methodologies is conducted for analysis, evaluation, and performance assessment. The present novel multigeneration system is mainly driven through the animal residues produced at the farm house. The proposed novel system is composed of nine main units namely, a biomass combustor, photovoltaic (PV) panels, parabolic solar trough collectors, thermoelectric generators, organic Rankine cycle, electrolyzer, homogeneous charged compression ignition (HCCI) engine, absorption chiller, and reverse osmosis (RO) unit. Biomass combustor runs an organic Rankine turbine for additional power during peak loads. The exhaust of gas turbine generates cooling to meet the cooling demand of the residential area of the farm house. PV panels are incorporated to generate hydrogen through electrolyzer. A HCCI engine generates power to compensate peak load as well as charging the farming vehicles of the farm house. The RO unit with energy recovery Pelton turbine produces fresh water for farming and residential use. The advanced integration of subsystems, thermoelectric generators and efficient utilization of waste, improves significant amount of energetic and exergetic efficiencies of overall multigenerational system. The energy and exergy efficiencies are enhanced in the order of 4.8% and 6.3%, respectively, after incorporating innovative cooling system to the PV modules. The overall energy and exergy efficiencies of the proposed multigeneration system with and without thermoelectric are found to be 67.6% and 57.1%, and 68.9% and 58.4%, respectively.

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Effective new pretreatment for seawater reverse osmosis systems

Cited by 23 publications

References 5 publications

A Unified Model-Based Analysis and Optimization of Specific Energy Consumption in BWRO and SWRO

A Unified Model-Based Analysis and Optimization of Specific Energy Consumption in BWRO and SWRO

Development of an Environmental Impact Assessment and Decision Support System for Seawater Desalination Plants

A novel renewable energy‐based integrated system with thermoelectric generators for a net‐zero energy house

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