IDE has an unparalleled track record of technological breakthroughs in desalination and water treatment. We have one of the largest and most experienced R&D teams in the industry, with more than 60 granted patents in the field.
These are some of the most significant, proven innovations that IDE has pioneered that have increased efficiency, economy and reliability, reduced CAPEX and OPEX costs and environmental impact.
Pressure Centre Design
The pressure centre design installed in large-scale plants such as Sorek, Hadera and Ashkelon, increases the system’s availability and reliability and reduces energy consumption due to the efficiency of large high-pressure pumps and energy recovery devices. It also provides increased flexibility of operation.
The pressure centre design maximizes the benefits of variable production rates during the day since it allows the increase or decrease of the feed pressure to the RO trains. During a decrease in production, all RO trains are kept in operation and the system recovery is decreased without increasing the total feed to the plant. This feature reflects the advantage of the Pressure Centre concept to produce efficiently at low recovery yields, resulting in lower osmotic pressures and producing at lower permeate fluxes through the entire available membrane area.
Boron Removal System
The process transfers water for a second time through a membrane cascade that removes boron ions to concentrations below 0.3ppm, meeting the requirements imposed by the Israeli Water Desalination Authority (WDA), enhancing the product water for agricultural needs. Patent granted.
Post Treatment Circulation
This is a technology for rehardening permeate and enriching with calcium and carbonate ions. This process allows decreasing volumes of rehardening columns by circulation of a large dose of CO2, and reducing the consumption of soda by the removal of free CO2 from the final product in a vacuum degasifier. Patent pending.
IDE PROGREENTM is a genuine environmental breakthrough – the first desalination plant based on a technology that eliminates the use of chemicals, thus avoiding chlorination and dechlorination, and the usage of chemicals in the coagulation process. This cutting-edge technology is based on natural biological coagulation for the pretreatment process, and on Direct Osmosis Cleaning (DOC – see below), for the reverse osmosis desalination process, saving time and money, while minimizing impact on the environment. Patent pending.
Direct Osmosis Cleaning (DOC)
DOC is a form of online backwashing of RO membranes in the seawater desalination process without stopping the high pressure pump or interrupting the desalination process itself, significantly increasing efficiency and enabling a chemical-free process. The osmotic backwash of the membrane provided by equalization of gauge pressure in the feed and permeate stream happens in such a way that osmotic pressure of the seawater sucks up permeate through the membrane, thus providing an extensive cleaning process. Patent granted.
16” Vertical Membranes
16” membranes in a vertical arrangement, as installed in the Sorek plant, allow a reduced footprint of the RO plant. This leads to a reduction in the size of the required RO buildings, and shorter pipelines and cables, hence reducing CAPEX and increasing operational efficiencies. This unique array allows easier membrane installation and safer operation as the operation staffs are not exposed to pressure vessel end-ports. They also significantly increase RO plant availability, due to decreased number of membranes and interconnections. Patent pending.
The Spot Cleaner is a revolutionary new approach to multimedia filtration (MMF) and backwash technology that provides continuous spot cleaning. This technology allows a reduction in the size of backwash tanks, pumps and pipes, reduced height of the MMF to below 3m and significantly reduced CAPEX and OPEX of seawater filtration. Patent pending.
Optimized Pressure Retarded Osmosis (PRO)
PRO is a new process that allows the extraction of energy from the difference between the osmotic pressures of two liquids. IDE has created numerous optimizations to the PRO process to increase efficiency and reduce cost. For Ocean-River PRO Power Generation, IDE redesigned the intake system, revised the pretreatment process, and made changes in the energy recovery system to be significantly less than industry standard.
IDE has also developed a new PRO/FO membrane arrangement that increases the efficiency of these processes. Here the membrane permeate tube is divided lengthwise and has such perforations that allow several membranes in the pressure vessel to work in parallel. Patent pending.
Batch PRO Process
IDE has developed a new Batch PRO technology that allows the implementation of standard spiral membranes in a B-PRO process. This allows the use of lower cost standard spiral membranes in place of specially made membranes.
The MVC: 38 Years of Experience
This paper describes the development of large capacity high efficiency MVC and the accumulated experience of this process in power utilities, refineries and the industrial sector.
Utilizing Available Coldness from Liquefied Natural Gas LNG Regasification Process for Seawater Desalination
In this article a case study was considered, in which an LNG regasification plant can supply 1750 ton/hr of water-glycol solution at -15°C to be utilized for seawater desalination. The main challenge in this evaluation is being able to provide a desalination solution able to compete with the commonly used RO plants.
Recovery of Osmotic Power in SWRO Plants
The paper analyzes the ways that different researchers have selected to overcome the phenomenon of CP, and presents an overview of the existing RO membranes from the point of view of their suitability for use in Forward Osmosis power generation.
Design Challenges and Operational Experience of a Mega MED Seawater Desalination Plant in Tianjin
This article is a continuation of the article "Sliding Pressure Turbine Integrated with Seawater Desalination Facility (MED)" presented at the IDA 2011 World Congress.
Three Pressure Retarded Osmosis PRO Processes
Pressure retarded osmosis (PRO) can be implemented on a number of water types, using different technologies and achieving various power outcomes. This paper presents the three most practical options.
Implementation of Build Operate Transfer Schemes: Obstacles and Solutions
This paper focuses on these cases, addressing the main causes of the failure of suggested/initiated BOT scheme offerings and what prevented their successful implementation. The paper analyses the main constraints and obstacles characterizing these setbacks, and presents different solutions and alternatives to by-pass and/or overcome these obstacles that, if adopted, could enhance the possibilities of successful implementation of the projects.