Electroplating chromium-containing wastewater treatment system and treatment technology thereof

Abstract

The invention discloses an electroplating chromium-containing wastewater treatment system and a treatment technology thereof. The treatment system comprises a chromium-containing wastewater collectingsystem, a first pH adjusting system, a second pH adjusting system, a shallow air-floatation system, a temporary storage system, a sand filter system and an ultrafiltration system which are sequentially connected, wherein the shallow air-floatation system is further connected with a plate-frame pressure filtration system. According to the electroplating chromium-containing wastewater treatment system, electroplating chromium-containing wastewater is subjected to full treatment and up-to-standard discharge, chromium ions and other pollutants in the wastewater are effectively treated, damage ofdirect discharge to the environment and the ecosystem is avoided, the technology process is simple, a treatment effect is stable, the treatment investment cost is low, and discharge standards are met.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to an electroplating chromium-containing waste water treatment system and a treatment process thereof. Background technique [0002] The electroplating industry is an important processing industry in my country, and the chromium-containing wastewater is a stream of wastewater that produces a large amount of water in the electroplating industry. The main component of chromium-containing wastewater is Cr 6+ , is the first type of pollutant, the most toxic, and the chromium-containing wastewater also includes a small amount of other metal ions such as Cu 2+ 、Co 2+ 、Ni 2+ , Fe 2+ , Ca 2+ 、Cr 3+ If one or more impurities are discharged directly without treatment, it will cause great harm to the environment and ecology. [0003] At present, for the treatment of chromium-containing wastewater, the commonly used treatment methods include chemical reduction, ion exchan...

AI Technical Summary

Problems solved by technology

The main component of chromium-containing wastewater is Cr 6+ , is the first type of pollutant, the most toxic, and the chromium-containing wastewater also includes a small amount of other metal ions such as Cu 2+ 、Co 2+ 、Ni 2+ , Fe 2+ , Ca 2+ 、Cr 3+ One or more impurities, if discharged directly without treatment, will cause great harm to the environment and ecology

[0003] At present, for the treatment of chromium-containing wastewater, the commonly used treatment methods include chemical reduction, ion exchange, and electrolysis. 6+ reduced to Cr 3 + , adding alkali to generate insoluble Cr(OH) 3 , and then removed by precipitation; the ion exchange method is to remove

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