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CASE STUDY – WATER CONSERVATION 1


A major semiconductor manufacturing facility with several large cooling towers supporting chillers for plant cooling. The plant used reverse osmosis treated makeup water for the cooling towers.


The plant had a corporate mandate for water conservation and the company was adding several more processes requiring RO/DI water.


Trident engineered a major process modification that blended RO reject water with city water for use as makeup water. This freed up 20,000 gallons per day of RO product water for the manufacturing process. The blended reject water was chemically treated with a special Trident inhibitor program, then provided as makeup water to all of the plant's cooling towers.


With a savings in high quality RO water in addition to the use of RO reject water, return on investment is projected to occur in less than four months. The combined overall savings will be in excess of $200,000.


CASE STUDY – WATER CONSERVATION 2


A chilled water plant with two 600-ton centrifugal chillers operating at 2.5 cycles of concentration with an all-organic program, located in a large high rise commercial building.


Flow throttling though a plate heat exchanger was a partial cause of deposits, while poor control of the previous water treatment program resulted in deposits on tube surfaces. Building management needed to reduce water consumption, and wanted to lower energy costs.


Trident recommended a new microprocessor-based control system. A new Trident inhibitor program was implemented, cooling water pH was adjusted, and cycles of concentration were raised to 4.5 – 5. Water usage was thereafter monitored closely with new meters.


Scale deposits were removed from tube surfaces, and almost one million gallons of water were saved. Electrical usage dropped 3%. Evaporation credits plus reduced blowdown provided return on investment in less than 10 months.


"... return on investment is projected to occur in less than four months."
   Case Study 1




" Evaporation credits plus reduced blowdown provided return on investment in less than 10 months."
   Case Study 2



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