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

A technology of pretreatment and wastewater, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Toxic pollutants and other issues are not clear, to achieve the effect of reducing investment and operating costs, wide adaptability, and good removal effect

Inactive Publication Date: 2017-02-22
陈亚松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The landfill leachate is discharged into the biological adsorption tank, the cod index is 1715, the nitrate is 77mg / l, the sulfate is 287mg / l, the copper is 4.6mg / l, the cadmium is 6.67mg / l; the hydraulic retention time is 40min, the sludge concentration is 3000mg / L, Dissolved oxygen 1.1mg / L. Then the wastewater is discharged into the sedimentation tank, the hydraulic retention time is 90min, and the separation of mud and water is completed. The supernatant is discharged into the coagulation adsorption unit, and the sludge returns to the biological adsorption tank. The return ratio is 30%, and the sludge is added during the return process The carbon source nutrient controls the sludge concentration in the sludge cultivation tank to 10000mg / L.

[0052] Discharge the effluent from the activated sludge adsorption unit into the coagulation tank, add coagulant to the coagulation reaction tank, react and mix for 30 seconds quickly, then add powdered activated carbon to the wa...

Embodiment 2

[0056] Discharge the wastewater from the industrial park into the coagulation tank. The cod index of the wastewater is 1405, the nitrate radical is 67mg / l, the sulfate radical is 265mg / l, the copper is 7.6mg / l, and the cadmium is 9.67mg / l; Quickly react and mix for 30 seconds, then add powdered activated carbon to the wastewater and enter the flocculation tank to react for 15 minutes. Finally, the mixed wastewater is discharged into the inclined plate sedimentation tank to complete the separation of mud and water. The supernatant is connected to the biosorption tank, and the powdered activated carbon is partially returned to the flocculation tank .

[0057] The dosage of coagulant and powdered activated carbon is 150mg / L.

[0058] The supernatant is discharged into the biological adsorption tank, the hydraulic retention time is 30min, the sludge concentration is 2000mg / L, and the dissolved oxygen is 1.5mg / L. Then discharge the wastewater into the sedimentation tank, the hydra...

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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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F3/1231C02F1/52
Inventor 陈亚松
Owner 陈亚松
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