A treatment method for removing heavy metals in industrial wastewater

Abstract

The invention discloses a removing method of heavy metals in industrial wastewater. The removing method comprises the following steps that wastewater sequentially passes through a water-collecting well, a coarse grid, a primary sedimentation tank, a pH value adjusting tank, a protein-heavy metal ion chelation reaction tower, a centrifugal separator, an aeration nitrification tank, a biological nitrogen removal tank, a secondary sedimentation tank and a water purifying tank to be treated. The system creatively utilizes a spherical supporter attached with cysteine (Cys) bovine serum albumin as a surface contact reaction medium, when the heavy metal-containing wastewater is in contact to the surface of the spherical supporter in a refined water mist state, heavy metal ions in the wastewater carry out chelation reaction with cysteine and bovine serum albumin through the induction action of metal-binding peptides to produce a metal complex, and the metal complex is insoluble in water and can be removed through centrifugal separation operation. Meanwhile, the protein supporter sphere can be replaced according to the use and consumption conditions as a low-value and short lived product.

Description

technical field [0001] The invention relates to a treatment method for removing heavy metals in industrial wastewater, which belongs to the field of wastewater treatment in environmental protection. Background technique [0002] Heavy metal pollution refers to environmental pollution and ecological damage caused by heavy metals and their compounds, and the degree of harm depends on the concentration and chemical form of heavy metals in the environment, food and organisms. Heavy metal pollution is mainly manifested in water pollution, and partly in the atmosphere and solid waste. Heavy metal pollution is different from the pollution of other organic compounds. Many organic compounds can be purified through the physical, chemical or biological effects of nature itself, so that the hazards can be reduced or eliminated; while heavy metals are enriched and difficult to degrade in the environment. [0003] From the perspective of environmental pollution, the most representative h...

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Problems solved by technology

[0010] Due to the shortcomings of the above-mentioned traditional treatment methods such as high cost, complicated technology, and unstable treatment effect, it is necessary to get rid of the existing treatment technology ideas, open up a new way to treat heavy metals in industrial wastewater, and then develop a new form of industrial wastewater Heavy Metal Treatment Technology

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