A design-for-environment study for plating processes -- Evaluations of wastewater precipitation and separation technologies

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:458370

Chang, L Y ^[1]

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1. Lawrence Berkeley National Lab., CA (United States)

A wastewater pollution prevention study was performed for two plating processes. This study included wastewater precipitation process analysis, and evaluation of separation and recycling alternatives. The pollution prevention opportunity assessment goals are: to reduce and reuse wastewater, to develop a design-for-environment plating process, and to conduct a material life-cycle analysis (LCA) for selected materials and with well-defined boundary. From an analysis of coordination chemistry and a series of precipitation process tests, it was found that treatment with optimized pH and mixing rate, proper coprecipitants (such as iron salts), and chemical dosages were needed to dissociate metal ions from the chelated complexes (Cu-EDTA) in the wastewater. In this study, reverse osmosis and ion exchange, separation/recycling technologies were also evaluated. A water reclamation project with these two technologies was implemented. The analysis indicated, that with recycling systems, 33% of the wastewater could be reclaimed and more than 90% of reduction of copper in wastewater was achieved. With the LCA, a greener approach was implemented to reduce the wasted parts disposal problems.

• OSTI ID: 458370
• Report Number(s): CONF-961149--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COPPER
INDUSTRIAL WASTES
MATERIALS RECOVERY
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE WATER
WATER POLLUTION ABATEMENT