Highly toxic waste water pre-treatment device and use method thereof

Abstract

The invention discloses a highly toxic waste water pre-treatment device and a use method thereof. The device comprises an active sludge adsorption unit and a coagulation absorption unit. In a use process, the active sludge adsorption unit removes COD (chemical oxygen demand) and partial heavy metal; the coagulation absorption unit removes most of the heavy metal. According to the practical use conditions, the installation and use sequence of the active sludge adsorption unit and the coagulation absorption unit can be freely arranged. The highly toxic waste water pre-treatment device disclosed by the invention has the advantages that heavy metal ions and the organic matter concentration of aromatic organic matters, phenol organic matters, ether organic matters and the like in industrial waste water can be greatly reduced; the total COD removal rate reaches 60 to 80 percent; the heavy metal removal rate reaches 80 percent; the beneficial conditions are provided for subsequent deep treatment of industrial waste water.

Description

technical field [0001] The invention relates to toxic waste water treatment, in particular to a highly toxic waste water pretreatment device and a method for using the same. Background technique [0002] With the development of industry, the types and quantities of industrial wastewater are increasing continuously. The components contained in it are complex and most of them have certain toxicity. The direct discharge of untreated toxic industrial wastewater into the biological treatment unit will cause a huge impact. At the same time, its toxicity and refractory organic matter greatly increase the difficulty and cost of subsequent treatment. As an effective means, pretreatment can remove a large amount of toxic components and refractory organic substances in industrial wastewater, and can greatly reduce the difficulty of subsequent treatment units. [0003] The treatment process of industrial wastewater is generally designed according to the target pollutants to be removed,...

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Problems solved by technology

[0004] However, the toxic components of industrial wastewater are relatively complex, and there are usually a large number of unclear toxic pollutants. It is difficult for traditional industrial wastewater pretreatment technologies to remove their toxicity in a targeted manner.

At the same time, even for clear toxic pollutants, especially when it involves a variety of toxic pollutants, it is still difficult to meet the emission standards through traditional pretreatment processes, and the cost of chemical, oxidation and other methods is extremely high. Take leachate treatment as an example, its treatment cost is 10-50 times that of conventional industrial wastewater

The anaerobic treatment efficiency of refractory organic matter is low due to its refractory biodegradability, and the treatment effect is not good. The cost of advanced oxidation method is extremely high. Because the concentration of industrial wastewater is generally high, it is rarely used in front-end pretreatment , while depth processing usually applied at the end

[0005] At present, there are few reports on the pretreatment process and technology for the toxicity of industrial wastewater, especially for the pretreatment of refractory and toxic wastewater, and there is still a lack of economical and effective treatment pretreatment technology

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