Evoqua Water Technologies provided the process design, engineering, fabrication and supply of more than 10 integrated water treatment technologies, including:
Evoqua provided all the water, wastewater and drinking water equipment, as well as an overall performance-based warranty. To meet the power plant's water, ZLD and aquifer requirements, Evoqua supplied a complete water management system with five subsystems:
Water pretreatment: after clarifying and filtering the plant's 5,800-gpm of intake water, the pretreatment system makes the water suitable for cooling tower makeup, steam cycle makeup and use by the gas-turbine evaporative cooler and the aquifer banking system.
Aquifer banking system: An ultrafiltration system treats all the water from the pretreatment system that is used to replenish the aquifer.
A blowdown treatment system uses lime softening and filtration, followed by reverse osmosis. The RO product water is returned to the cooling tower, while the reject water is recycled to the ZLD system.
A ZLD system evaporates the RO reject into a dry, crystalline solid that is landfilled. The distillate is used as makeup water for the HRSG's, with the remainder returned to the cooling tower. CDI-LX systems polish the evaporator distillate for boiler/steam cycle makeup.
A demineralized water system provides makeup water for the plant's three HRSGs.