Treatment method for heavy-metal-polluted industrial wastewater by combining chemical leaching and biological reactions

Abstract

The invention discloses a treatment method for heavy-metal-polluted industrial wastewater by combining chemical leaching and biological reactions. The wastewater sequentially goes through a water collection tank, a coarse screen, a first sedimentation pool, a pH-value regulating pool, a heavy-metal-ion chelating reaction tower, a centrifugal separator, a secondary sedimentation pool and a water purification pool for treatment. According to a system, a spherical supporter attached with cysteine bovine serum albumin is creatively utilized as a surface contact reaction medium, when the wastewater with heavy metal and in a refined water-mist state is in contact with the surface of the spherical supporter, under the synergistic effect between the waste water and compositions of a chemical leaching solution and the induction effect of metal-binding peptide, heavy metal ions in wastewater have chelating reactions with the cysteine (Cys) bovine serum albumin to take a chelating effect on various heavy metal ions of copper, zinc, lead, chromium, cadmium, platinum, silver and gold to generate a metal complex compound, and the metal complex compound is insoluble in water and removed through centrifugal separation operation. The removal efficiency of the heavy metal can reach 99.2%.

Description

Technical field [0001] The invention relates to a method for treating heavy metal polluted industrial wastewater that combines chemical leaching and biological reaction, and 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. 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 part of it is 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 the natural world to reduce or eliminate their hazards. Heavy metals are enriched and difficult to degrade in the environment. [0003] From the perspective of environmental pollut...

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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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