Treatment of Cooling Tower Blowdown Water with Membranes in a Zero Liquid Discharge (ZLD) Power Plant

摘要

The Indiantown Cogeneration plant has'recently modified their Zero Liquid Discharge (ZLD) scheme to incorporate membranes to treat the blowdown from their cooling tower. This was originally sent to two brine concentrators. The plant required the flexibility to use any combination of make up water. It was also desirable to replace the brine concentrators due to corrosion and resulting savings in power. The Integrated Membrane System (MF/RO) was commissioned, in 2011It allowed the brine concentrators to be replaced and generated high-quality permeate for boiler feed while maintaining zero liquid discharge.