The Future of Desalination Plant Design

IDE. Your Water Partners

webinar_portrait_boaz
Boaz Keinan
Head of IDE’s RO Process Dept.

 

 

 

Technology

  • Hello, Is IDE build any facility for the separation of water and oil, is IDE have the technologies

IDE has installed DAF units that are designated between other things to remove oil from water. Additionally , oil seperation can be provided as part of our Indusrial water treatment solution

  • In Texas we are particularly interested in the technologies associated with brackish groundwater. Are there emerging technologies in this area?

IDE has a BWRO standard modular solution with ability to add complementary pretreatmnet solutions that can treat typical brackish water contaminants. Additionally IDE has developed a special Direct osmosis cleanings that can minimize the need for membranes CIP Cleaning with chemicals.

  • Where is the lamella plate/DAF facility?

HI Jon!! , Lamella plates and DAF on filter solution are installed in Cape Preston and currently in Jamnagar ( which is going through commissioning)

  • Hi, in slide 10, you mentioned high recovery. Can we know how much is the recovery?

The high recovery is refering to a 2nd pass RO with IDE's Cascade design . The recovery of the 2nd pass cascade is 96%

  • Can you please discuss the time requirements needed within the methodlogy to have the operations team interact more frequently with the design team? Is it realistic under current conditions to expect the operations team to take on this additional work?

Clearly one of the biggest chalanges in this regards . Both the enginnering team and the operation teams are busy in their day to day routine. Therefore the interaction should be defined , accompanyied and prioritized by managment . Both sides can contribute and benefit therefore creating a "win win" environment. Once in 4 to 6 mounths is preferable.

  • For the end of the lecture: Do IDE's plants use high-pH environments for boron removal? If so, is there a projected replacement technology that will reduce the effect of high-pH on membrane degradation?

Yes, the 2nd pass design includes high pH environment for boron removal . The pH range is between 9 and 10.5 and typically no degradation is observed. Other technologies like Ion exchangers are considered in different cases . But typically the cascade high pH design is a very robust one

  • what have you learned about intake design to reduce inlet water quality variability of turbididty?

Typical Intake designs include a rotating screen installation ( or similar) that prevents coarse suspended solids and dirt from entering the pump's suction area and the RO plant . Intake location and namely the suction point will typically be chosen so that storms effects and high turbidity events will be minimzed ( distance from shore and depth will be considered.

  • Is there an agreement that chemicals are the largest environmental hazard of desalination plants in general?

It is dependent on the specific site, and the permiting constrains . Generally chemicals are considered as an operational hazard and environmental hazard .

  • When you look 5-7 years into the future, what do you see as the biggest potential breakthrough technology or change in the process?

I expect breakthroughs in the operational cost , mainlly derivied from operation expiriences but also to do with higher efficiency membranes ( same salt rejection , lower energy consumption ).

  • Are you actively looking at opportunities to add solar thermal or solar photovoltaic designs into your plants to support environmental-friendly trend in future desalination plant designs? There appear to be opportunities for better integration of solar to support a next generation of renewable energy driven desalination technologies

Although we looked into this opportunity in the past and it seemed not cost effective . I do think that intigrating a photovoltaic design within one of our plants has very good potential.

  • i would like to know what your rule of thumb design number for electric consumption is? i have been using 1,000,000 kw every 24hrs to process 250,000 cubic meters

The SE of a plant can change drastically depending on the capacity , plant's components ( intake ? Product ? Brine delivery ?) , SW TDS and temperatures etc. As was presented in the webinar we expect between 2.8 to 4 kWh/m3 ( typical 3.5 ) . And with time ,as more expirience gained , we reach lower Specific energies.

  • Are their any energy savings technology used by IDE in operation of their plants?

In addition to energy recovery systems that are used as standart ( ERIs, Calder, Turbo chargers etc ) , IDE optimises membranes performance through advanced monitoring and by that reduces the plant's energy consumption .

  • What is the lifetime of the membranes used with the DOC cleaning technology presented in the last slide?

Installations are showing stable performaces ( operating for 2.5 years now )

  • In which areas of your plants are you currently using thermoplastic piping systems including valves and fittings (like PE-100, PP, PVDF and ECTFE) and what is your experience with such materials with regards to reducing maintenance intervals?

Plastic piping is used in all low pressure areas . For example : RO permeate lines are typically from PP , Chemical lines are typically from PVC , HDPE is occasionally also used for Intake and brine lines ( low pressure )

  • Will you be utilizing renewable sources in the design process? We have off grid solutions specifically for water desalination.

Although we looked into solar technologies in the past and it seemed not cost effective . I do think that intigrating a renewable source within one of our plants has very good potential.

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