A treatment system for antimony-containing electroplating wastewater

Abstract

The invention discloses a treatment system for antimony containing electroplating wastewater. The treatment system comprises a water collecting well, a coarse screen, a primary settling pond, a pH value adjusting pond, a chitosan-biocatalysis adsorption purification system, an aeration pond, a biological phosphorus removal pond, a secondary settling pond and a clear water pond. According to the system, a rolling adsorption brush to which chitosan and sargassum thunbergii are attached is creatively used as a selective contact reaction medium, when antimony ions in the wastewater make full contact with the rolling adsorption brush, hydroxyl, carboxyl and acylamino on molecular chains of chitosan and sargassum thunbergii can selectively generate a complex reaction with the antimony ions, antimony in the wastewater is efficiently adsorbed by the sargassum thunbergii, sargassum thunbergii residues obtained after an adsorption reaction are brushed away through a fixed brush and then naturally settle, sludge matter is gradually formed, and therefore the antimony ions in the wastewater are removed. Meanwhile, the materials chitosan and sargassum thunbergii adopted in the system are matter which is low in cost and easy to get.

Description

technical field [0001] The invention relates to a treatment system for antimony-containing electroplating wastewater, which belongs to the field of wastewater treatment in environmental protection. Background technique [0002] In recent years, antimony has been widely used in the non-ferrous metal industry, and the antimony-containing wastewater discharged from factories is the main source of antimony pollution in water bodies. For example, smelting, printing, ceramics, lead-acid batteries, flame retardants, mineral processing, ore washing and other industries discharge wastewater with a very high content of antimony, which is particularly serious for water pollution. In the electroplating industry, antimony oxide is often used as the base coating material for titanium electrodes. As the electroplating progresses, antimony elements will gradually enter the wastewater. When a large amount of antimony enters the body, it will stimulate and destroy the respiratory tract, dige...

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Problems solved by technology

Although it has many advantages such as simple process, convenient operation, economical and practical, its sedimentation residue is difficult to handle and will cause secondary pollution

(2) The electrolysis method uses platinum group oxides or PbO 2 As an anode to destroy cyanide, and then flocculate, precipitate, and filter antimony ions under the condition of pH=11 to remove antimony, this method consumes a lot of energy, so it has not been widely used in the treatment of antimony-containing wastewater

However, this method is limited by the adsorption capacity of the resin, so it is suitable for treating wastewater with low concentration of antimony, and the resin is easy to be poisoned, and the treatment cost is high

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