Wastewater Treatment from Galvanization Industry with Zinc recovery

The resistance of steel to corrosion is obtained with a number of industrial processes based on Zn galvanization. However, all these methods bear a relatively high price tag due to the cost of Zinc plates and electrolytes as well as the formation of hazardous wastewaters containing metals and acids....

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Bibliographic Details
Published in:E3S web of conferences 2021-01, Vol.247, p.1064
Main Authors: Zueva, Svetlana, Ferella, Francesco, Ippolito, Nicolò M., Ruduka, Elena, De Michelis, Ida
Format: Article
Language:English
Subjects:
Calcium sulfate
Coagulants
Corrosion resistance
Electrolytes
Galvanizing
Hazardous wastes
Heavy metals
Metal industry wastewaters
Pickling
Precipitates
Recovery
Sludge
Sodium hydroxide
Wash water
Wastewater treatment
Zinc
Zinc plating
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Summary:The resistance of steel to corrosion is obtained with a number of industrial processes based on Zn galvanization. However, all these methods bear a relatively high price tag due to the cost of Zinc plates and electrolytes as well as the formation of hazardous wastewaters containing metals and acids. Wastewaters from Zn galvanization may be grouped into two main types: Mix of Rinse Water (MRW) and Spent Pickling Solutions (SPS). Ordinarily, these waters are mixed and sent for treatment by precipitation. As a result large volumes of galvanic sludge is formed, containing iron, calcium, sulphates and a relatively small quantity of zinc (
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/202124701064