Treatment device and treatment method for acid wastewater polluted by mine heavy metals

Abstract

The invention discloses a treatment device and a treatment method for acid wastewater polluted by mine heavy metals. By virtue of the treatment device, liquid can flow among a sedimentation tank, a reduction device, a desulphurization device, a PRB (Permeable Reactive Barrier) device and a pH regulating tank through a pump system and a water guide pipe system, so that the reduction of sulfate in the wastewater, desulfurization of the wastewater, removal of heavy metal pollution and the pH regulation of the wastewater are achieved. The treatment device and the treatment method have the advantages of simple process, simple operation, low cost, high efficiency and capability of realizing large-scale and engineering application of treatment of acid wastewater polluted by the mine heavy metals; meanwhile, the pollutants are placed in a relatively closed space in the whole technological process, so that the secondary pollution in the pollution treatment process can be effectively avoided, thus the treatment device and the treatment method can be widely applied to the safe treatment of acid wastewater polluted by different types of mine heavy metals, and the pollution caused by the heavy metals such as arsenic, lead, copper, zinc, chrome, cadmium and the like in the wastewater can be effectively removed.

Description

technical field [0001] The invention relates to the fields of ecology and environmental protection, in particular to a biochemical treatment device for acidic wastewater polluted by heavy metals in mines and a treatment method for acidic wastewater polluted by heavy metals in mines. Background technique [0002] With the continuous mining and development of mine resources in our country, the massive accumulation of coal gangue and other tailings has become an important environmental problem. According to statistics, the tailings produced by the current mine mining and development have accumulated up to 6-10 billion tons, which has caused a series of geological environmental problems. Among them, mine heavy metal polluted wastewater has become a major hidden danger to the safety of the current mine ecological environment, especially coal gangue containing a large amount of sulfur. Due to the oxidation of pyrite, a large amount of acidic wastewater is produced. The dissolutio...

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Problems solved by technology

[0008] The object of the present invention is to propose a kind of biochemical treatment device of mine heavy metal polluted acidic wastewater and the disposal method to mine heavy metal polluted acidic wastewater, the biochemical device method of mine heavy metal polluted acidic wastewater realizes liquid in The flow between different treatment devices, the wastewater passes through the sedimentation device, the reduction device, the PRB ((Permeable Reactive Barrier) device and the pH adjustment tank to realize the reduction of sulfate in the wastewater, the desulfurization treatment of the wastewater, the removal of heavy metal pollution and the purification of the wastewater. pH adjustment, also has a desulfurization device to achieve desulfurization, which fundamentally solves the acidification and heavy metal pollution of acidic wastewater polluted by heavy metals in mines

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