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Kadima, Israel

Liberman B.,IDE Technologies
Desalination and Water Treatment | Year: 2010

The process of recovering gauge pressure from SWRO desalination plants is well known, and based on implementation work exchangers like DWEER or ERI. The possibility to recover osmotic pressure as mechanical work was developed by Prof. Sidney Loeb 30-35 years ago and patented by the Ben-Gurion University of the Negev. Till now the osmotic pressure present in SWRO brine stream was practically not recovered. The paper presents a way that allows simultaneous power recovery of gauge and osmotic pressure. Simultaneous power recovery of both power sources gives a higher power yield then the two processes applied separately. Recovery of osmotic pressure is made by high fluxes and requires an effective membrane cleaning method. The paper presents a direct osmosis high salinity (DO-HS) membrane cleaning technology. The DO-HS technology pro- vides a new approach to keeping membranes continually clean by frequent and short membrane backwash. RO membranes can be backwashed on-line ones a day without stopping a high pressure pump or decreasing the RO separation pressure. A few second injection of NaCl solution redirects the process from RO to DO and within 1 min the membranes are cleaned, and the process comes back to RO production. © 2010 Desalination Publications. Source

Schluter B.A.,IDE Technologies | Rosano M.B.,Curtin University Australia
Journal of Cleaner Production | Year: 2016

Significant increases in industry energy efficiency are crucial for the transformation of the world's energy systems. Many production sites offer high energy savings capabilities, and if these are accompanied by short periods of economic amortization, companies should be willing to act. This case study provides a novel and extended energy assessment for plastics processing plants including primary energy, greenhouse gas emissions, and energy costs. The research distinguishes between the standard form of separate individual energy assessments and provides a more innovative holistic approach taking all relevant energy flows within the production system into account. Dynamic simulation offers a quick and effective way to predict the results of the possible energy saving measures highlighted in this analysis. The paper presents validated energy consumption simulations based on realistic processing conditions for two injection molding factories in different climatic zones. The results show that combining a number of separate energy saving measures can reduce the primary energy demand by around 26% for a German plant under temperate climate conditions and 20% for a Western Australian plant under Mediterranean conditions. However, when the separate energy saving measures are holistically combined the reduction in energy use significantly increases to 41% and 43% respectively. This holistic energy strategy involves incorporating better cogeneration and waste heat recovery options. For small and medium sized companies in particular major energy infrastructure investments may often be considered too expensive without examining the extended benefits from a holistic energy assessment perspective. In contrast, a holistic framework, like the one suggested in this paper could provide a number of new options for increasing energy efficiency that individually might normally not be accepted under conventional economic rate of return analysis. © 2016 Elsevier Ltd. Source

Hasson D.,Technion - Israel Institute of Technology | Segev R.,Technion - Israel Institute of Technology | Lisitsin D.,Global Environmental Solutions Ltd. | Liberman B.,IDE Technologies | Semiat R.,Technion - Israel Institute of Technology
Desalination | Year: 2011

The present paper describes pilot plant development of a novel process enabling increase of water recovery in brackish water desalination without using any chemicals. This is achieved by precipitating the scaling salts of a carbonate-rich concentrate by increasing the pH through air stripping of CO2 from the solution. Additional permeate is extracted from the treated concentrate by a secondary RO unit. The pilot plant data confirmed that a precipitation conversion of CaCO3 of at least 70% can be achieved by the aeration process at a retention time of about 2 h in the precipitation vessel. Integration of the concentrate treatment with the primary desalination process enabled increase of the overall water recovery from 78% to 90%. Higher recoveries exceeding 95% can be anticipated in processing concentrate solutions of sufficiently high carbonate content. © 2011 Elsevier B.V. Source

Qin J.-J.,PUB Consultants Pte Ltd. | Oo M.H.,PUB Consultants Pte Ltd. | Kekre K.A.,PUB Consultants Pte Ltd. | Liberman B.,IDE Technologies
Journal of Membrane Science | Year: 2010

The objective of the study was to further develop a novel cleaning technique for reverse osmosis in reclamation of municipal secondary effluent. This technique is a new backwash method via direct osmosis (DO) by intermittent injection of the high salinity (HS) solution without stopping of high pressure pump and it is environment and membrane friendly technique. In the study, DO-HS trials were carried out with a UF-RO pilot system which was operated on site with the secondary treated effluent as the raw feed. Different operating conditions for DO-HS treatment in the actual process were investigated. It was found that the operation for implementation of the DO-HS cleaning technique developed was easy. For the first time, the actual profiles of HS concentration, DO backwash flow rate, brine flow rate and permeate pressure during DO-HS treatment have been demonstrated. It was observed that turbidity of the brine stream during DO-HS treatment at 3 NTU was 5 times higher than that before DO-HS treatment. The results from this study have confirmed the previous hypothesis with DO-HS treatment that there would be a strong driving force for DO backwash to lift and sweep the foulants from the membrane surface which would be carried over to the brine. The optimal plant operating conditions in terms of RO feed flow rate, HS concentration and HS injection time are ready for the DO-HS method to be adopted and validated in a long-term continuous plant operation. © 2009 Elsevier B.V. All rights reserved. Source

News Article | February 27, 2014
Site: www.wired.com

How they’ll profit: Investors are buying water rights and farmland, because drought and food shortages can mean big profit. How they’ll profit: Snowmakers help skiers and snowboarders ignore shorter seasons and undependable weather. How they’ll profit: More frequent natural disasters means insurers can hike rates, and natural disasters are great advertising. How they’ll profit: Melting ice will expose untapped reserves in the Arctic and newly navigable seas for smoother shipping. How they’ll profit: Modified seeds fare better, and engineered mosquitoes fight the spread of diseases. How they’ll profit: Fish, greener pastures, and water become more plentiful up north, while drought-stricken nations pay for resources.

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