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ETV REPORT: AND STATEMENT: HYDROMATIX 786E ION EXCHANGE RINSEWATER RECYCLING SYSTEM
Citation:
Cal/EPA, Dept. of Toxic Substances Control. ETV REPORT: AND STATEMENT: HYDROMATIX 786E ION EXCHANGE RINSEWATER RECYCLING SYSTEM. EPA/600/R-02/038, 2002.
Impact/Purpose:
Information.
Description:
RPA's ETV Program, through the NRMRL, has partnered with the California Dept. of Toxic Substances Contol (DTSCO) under an ETV Pilot to verify pollution prevention, recycling, and waste treatment technologies. This report provides a verification of performance results for the Hydromatix 786E Ion Exchange System. Hydromatix Corp. (Santa Fe Springs, California) developed its 786E system to remove cations and anions from rinse wastewaters generated during metal finishing operations such as electroplating, cleaning, and anodizing. Regeneration of ion exchange resins consists of a series of acid and base rinses which result in restored resin functionality, while minimizing the volume of regenerant waste produced. Hydromatix developed an ion exchange regeneration process for their Model 786E system which used a programmable logic controller (PLC) system to coordinate acid and base rinse water reuse. This reduces the volume of regenerant chemicals wasted, and consequently the volume of regenerant wastewater produced. The Hydromatix system features a packed bed, counter-current ion exchange columns with conductivity meters, PLC, and automatic valves to control the regeneration process. The cationic and anionic ion exchange columns are packed with Purolite PFC-100 H and Purolite PFA-300 OH resins (purolite USA, Bala Cynwyd, PA), respectively. By reusing portions of the regenerant rinses as make-up solutions for the next cycle, and by returning other rinses to the feed tank rather than to waste, the system is able to achieve a substantial reduction in the amount of chemicals used as well as in the amount of wastewater produced during each regeneration cycle.