Method for treating low-concentration wastewater containing strong complex nickel

• Main Authors: XIONG JIANGLEI, CAI HONGZHAN, DING KAIYUN, LU SHENGXING
• Format: Patent
• Language: Chinese; English
• Published: 18.12.2018
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a method for treating low-concentration wastewater containing strong complex nickel. Firstly, the pH of the nickel-containing wastewater is adjusted to be neutral, and after being pretreated by a multi-media filter and an activated carbon filter, the nickel-containing wastewater is processed in a reverse osmosis system; after adjusting of the pH of concentrated water treated by the reverse osmosis system, iron-carbon microelectrolysis and Fenton reaction are sequentially performed; an oxidizing agent is added to effluent after the Fenton reaction; a reducing agent is added into the effluent after the oxidation; the effluent after the reduction reaction is added with an alkali and then precipitated; after adjusting of the pH of supernatant obtained after the precipitation, the supernatant is adsorbed by selective chelate ion exchange resin and discharged. The method improves the pertinence and reaction efficiency of subsequent complexing destructive measures; thewater production rate is