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A Novel Approach To Seawater Desalination Using Dual-staged Nanofiltration
As the quantity and quality of inland water sources decline, more coastal municipalities are looking at seawater desalination as a potential source of drinking water. The Long Beach Water Department (LBWD) developed an alternative technology to desalt seawater by using dual-staged nanofiltration (NF2). This novel NF system treats the first-stage permeate through a second stage in order to produce finished water with salinity levels that meet drinking water standards.
Three commercially-available NF membranes were selected for this study based upon their designation as NF membranes by the manufacturers and their salt rejection characteristics. Results from the bench-scale evaluation were integrated in a performance-predicting model, which was subsequently calibrated against the results obtained with an 8-gpm pilot unit. The pilot-test plan considered the impact of temperature, pressure, and array configuration on permeate water quantity and quality. The percentage of desalinated water that could be blended into LBWD's distribution system was determined by taking into account the issues of disinfection by-product (DBP) formation, disinfectant residual, and corrosivity. Finally, viral challenge tests were considered to verify the inherent redundancy of the system and the impact that recycling streams would have on virus accumulation.
A Guide To Filtration With String Wound Cartridges
A Guide to Filtration with String Wound Cartridges: Influence of Winding Parameters on Filtration Behaviour of String Wound Filter Cartridges explains the science behind winding phenomena with reference to the use of string wound cartridges in various environments, and is helpful in educating aspiring researchers and technicians on these new technologies that seek to quell the ongoing scarcity of water through the use of new and emerging filtration techniques.
The book provides detailed information about cartridge winding parameters, the number of layers put on the cartridge, their necessary availability, and the retention capacity and pressure drop. In addition, the book provides guidelines regarding the selection of winding variables so that new cartridges that cater to the specific porosity of different sized particles can be developed.
- Presents data and conclusions that are based on actual experimental work
- Provides explanations on why winding parameters influence the performance of wound cartridges
- Describes problems encountered during cartridge formation and during its use in filter testing
A-z Of Filtration And Related Separations
This book is a concise encyclopaedia-type publication which covers all aspects of filtration and separation in alphabetical form including: all filtration media; all types of filtration and related equipment; all relevant processes; all applications within which terminology is used which is particular to filtration.
It covers solid/liquid separations, solid/gas separations, solid/solid separations, liquid/liquid separations, liquid/gas separations and three phase separations. It includes membrane technology as well as fringe technologies such as ion exchange, electrostatic precipitation and dialysis.
It is a ready reference source for all and any aspect of the subject, and will be of great value to the filtration specialist as well as process engineers whose job encompasses filtration.
ÃºSingle resource for definitions, explanations and concepts
ÃºPractical and theoretical
ÃºAll phases covered
ÃºKeep on your desk, lab bench or workshop
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