Electroplating nickel-containing wastewater resource utilization technology

Abstract

The invention discloses an electroplating nickel-containing wastewater resource utilization technology which comprises the steps of firstly collecting and storing electroplating nickel-containing wastewater, removing suspended solids in wastewater, filtering part of organism and auxiliaries out through activated carbon, then sequentially performing ultrafiltration, nanofiltration and reverse-osmosis operation on the purified electroplating nickel-containing wastewater to obtain concentrated solution and finally evaporating the concentrated solution in environment with temperature of 160 DEG C and steam pressure larger than 0.6Mpa to obtain nickel crystal. According to the electroplating nickel-containing wastewater resource utilization technology, the wastewater is sand filtered to remove particles, part of organic pollutant and part of heavy metal are filtered out by the activated carbon, finally wastewater can reach a standard to be reused through ultrafiltration, nanofiltration and reverse osmosis; furthermore, percolate can be reused to a plating tank after crystallization, and plating cost is reduced.

Description

technical field [0001] The invention relates to electroplating wastewater recovery and treatment technology, in particular to a resource utilization process of electroplating nickel-containing wastewater. Background technique [0002] The electroplating industry produces a large amount of nickel, copper, and chromium waste water every year, which not only causes waste of resources, but also pollutes the environment, destroys water quality, affects the production environment of aquatic animals and plants, destroys ecological balance, causes the death of fish and shrimp, and endangers the growth of crops. Heavy metals in wastewater are enriched in the human body through the food chain, causing serious impacts on human health and even death. [0003] At present, the main methods for treating electroplating wastewater include chemical methods, physical methods, physical chemical methods, and biochemical methods. Chemical methods remove toxic and harmful substances from wastewat...

AI Technical Summary

Problems solved by technology

Chemical methods remove toxic and harmful substances from wastewater through redox and chemical precipitation. Although heavy metal ions can be removed from wastewater, it is easy to cause secondary pollution and can only transfer pollutants from the liquid phase to the solid phase. , the pollutants and their hazards have not been eliminated, and at the same time caused a waste of resources

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