Treatment method for industrial wastewater generated by copper wet-process smelting

Abstract

The invention discloses a treatment method for industrial wastewater generated by copper wet-process smelting. The method comprises the following steps of: adjusting the pH value of the copper-containing industrial wastewater added with sodium hydroxide solution to be 7.5-8.5, and then performing flocculating-settling treatment; then adding sodium sulphide, and performing precipitation pre-treatment on copper ions; charging ammonia after the pre-treatment, adjusting the pH value to 8.5-9.5, adding propenol and EDTA (ethylene diamine tetraacetic acid) organic substance simultaneously, and stirring for completely reacting; and finally adding a polymeric ferric sulphate flocculant and performing flocculating treatment to obtain the effluent, namely, the copper-containing wastewater after the treatment. The treatment method disclosed by the invention is low in operating cost, low in slag amount, and simple and convenient to recover copper; and heavy metal ions, petroleum substances, suspended matters and COD (chemical oxygen demand) value achieve the three-level drainage standards of industrial wastewater.

Description

Technical field [0001] The invention discloses a method for processing industrial waste water produced by copper wet smelting, and belongs to the field of sewage treatment. Background technique [0002] Coagulation technology occupies an important position in water treatment, whether it is water supply treatment or wastewater treatment, especially the treatment of difficult industrial wastewater, whether it is secondary treatment or advanced treatment, as long as the water contains colloidal substances that cannot be separated by natural precipitation Most of the substances that are easy to form a stable system are processed by coagulation technology, or combined with other technologies. [0003] At present, the coagulation and sedimentation facilities used at home and abroad have the following problems: (1) In order to ensure the effect of mixing and reaction, mechanical stirring is required, and the operation power consumption increases; (2) To ensure the effect of water output, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the coagulation and sedimentation facilities used at home and abroad have the following problems: (1) In order to ensure the effect of mixing and reaction, mechanical stirring is required, which increases the power consumption of operation; (2) In order to ensure the effect of water discharge, sufficient settling time is required , resulting in a huge structure; (3) unreasonable dosing of chemicals, resulting in low utilization of chemicals and waste; (4) greatly affected by water quality fluctuations; (5) single function, low processing efficiency; (6) high intensity of operation and management, etc.