Acidic coal mine wastewater treatment device and method

A technology of coal mine wastewater and treatment device, which is applied in mining wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Effect

Active Publication Date: 2012-12-19
江苏艾特克环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] These methods have their inherent defects, and the most important thing is that the acid coal mine wastewater has an ultra-high SS value and a high heavy metal content, which increases the difficulty of treating this wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The experimental water was taken from the underground water of Zhaogezhuang Coal Mine in Tangshan City. The pH value of the influent water is 3.3, the COD value of the influent water is 110mg / l, the TN value of the influent water is 70mg / l, the SS value of the influent water is 4300mg / l, and the contents of copper ions, iron ions and manganese ions are respectively 30.5mg / L , 67mg / L and 54.4mg / L.

[0026] First, introduce the wastewater to be treated into the coagulation tank, and add a coagulant into the coagulation tank. The coagulant is a mixture of diesel soda residue and PAM solution. The dosage is 5ml / L, and the speed of 200 rpm is used first. Stir rapidly for 1 minute, then change to 40 rpm and stir for 15 minutes. The coagulant is prepared in such a way that the diesel alkali slag with an oil content of less than 5% is prepared into 25% alkali slag slurry with water, and PAM is prepared into a 0.6‰ aqueous solution. The PAM solution and the alkali slag slurry ...

Embodiment 2

[0032] The experimental water was taken from the underground water of Zhaogezhuang Coal Mine in Tangshan City. The pH value of the influent water is 3.1, the COD value of the influent water is 133mg / l, the TN value of the influent water is 91mg / l, the SS value of the influent water is 3400mg / l, and the contents of copper ions, iron ions and manganese ions are respectively 22.5mg / L , 87.3mg / L and 65mg / L.

[0033] First, introduce the wastewater to be treated into the coagulation tank, and add a coagulant into the coagulation tank. The coagulant is a mixture of diesel soda residue and PAM solution. The dosage is 6ml / L, and the speed of 200 rpm is used first. Stir rapidly for 1 minute, then change to 40 rpm and stir for 15 minutes. The coagulant is prepared in such a way that the diesel alkali slag with an oil content of less than 5% is prepared into 35% alkali slag slurry with water, and PAM is prepared into a 0.8‰ aqueous solution. The PAM solution and the alkali slag slurry ...

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Abstract

The invention provides an acidic coal mine wastewater treatment device and method. The acidic coal mine wastewater treatment device comprises a coagulation tank, a precipitation tank, a filter unit and a bioreactor, wherein a stirrer is arranged in the coagulation tank, and the rotation speed of the stirrer is adjustable. The coagulant is prepared by the following steps: preparing diesel caustic sludge with the oil content of lower than 5% and water into 20-40% caustic sludge slurry, preparing PAM (polyacrylamide) into a 0.06-0.1% water solution, and mixing the PAM solution and the caustic sludge slurry in a volume ratio o 1:2-1:5. The filter unit is a filter column which is 1.5-1.8 meters long, the internal diameter of the column is 30 millimeters, and the filter material used in the filter column is manganese sand soaked with a potassium permanganate solution. A biomembrane carrier is added into the bioreactor; and the carrier is a suspended biological carrier prepared from cocoanut shells.

Description

technical field [0001] The invention relates to a device and method for treating coal mine wastewater, in particular to a device and method for treating acidic coal mine wastewater. Background technique [0002] At present, the industry mainly adopts the following three methods for the treatment of acid wastewater in mining areas: [0003] (1) Chemical precipitation methods represented by neutralization precipitation and sulfuration precipitation. The chemical precipitation method is used to treat high-concentration mine acid wastewater mainly by adding a neutralizer or a vulcanizing agent to increase the pH value of the wastewater and form hydroxide or sulfide precipitation with the metal ions in the wastewater, and finally remove the precipitate by solid-liquid separation. Wastewater discharged up to standard. Although the chemical precipitation method has been continuously developed and improved, it is becoming more and more mature, but due to the large amount of precip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/10
Inventor 周亚强吴园文吴建国
Owner 江苏艾特克环境工程有限公司
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