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A method for treating sulfur ore wastewater with fermented yeast liquid

A technology for mine wastewater and mother liquor, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as high cost, high recovery rate of heavy metals, air pollution, etc. Low, high separation rate of heavy metals, easy recovery effect

Active Publication Date: 2020-04-03
那坡县誉桂农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the artificial wetland method uses natural peat moss swamp to treat sulfur mine wastewater, and the treatment fee is about 9 yuan / m 3 , the treatment cost is low, but the recovery of hydrogen sulfide is not complete, and it is discharged into the air in gaseous form, causing air pollution; the microbial method has a high recovery rate of heavy metals, but the conditions are harsh, there are many additives, the cost is high, and the separation effect of heavy metals alone is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for treating sulfur ore wastewater with fermented yeast liquid, the steps are:

[0024] (1) Add activated carbon to mine wastewater and stir for 0.5-1h at a stirring speed of 60-120r / min, filter to obtain particulate matter precipitation and liquid;

[0025] (2) Transfer the liquid in step (1) into the sedimentation tank where rice straw is laid, heat up to 30-60°C, add Thiobacillus ferrooxidans fermented yeast liquid and stir for 3-8h, the stirring speed is 30-60r / min After standing still for 5-10h, adding a buffer solution with a concentration of 20-30% for stirring for 20-40min, filtering to obtain ferric hydroxide colloid and filtrate;

[0026] (3) When the temperature of the filtrate is adjusted to 50°C, add sulfate-reducing bacteria fermentation yeast liquid, seal and stand until the COD concentration is 3.0g / L, filter to obtain PbS, then seal and stand until the COD concentration is 1.5g / L, Filtration to obtain CuS and metaaluminate liquid.

[0027] Sa...

Embodiment 2

[0035] A method for treating sulfur ore wastewater with fermented yeast liquid, the steps are:

[0036] (1) Add activated carbon to the mine wastewater and stir for 0.9h at a stirring speed of 80r / min, filter to obtain particulate matter precipitation and liquid;

[0037] (2) Transfer the liquid in step (1) into a sedimentation tank where rice straw is laid, heat up to 50° C., add Thiobacillus ferrooxidans fermented yeast liquid and stir for 5 hours at a stirring speed of 55 r / min. After standing for 8 hours, After adding a buffer solution with a concentration of 25% and stirring for 35 minutes, filter to obtain ferric hydroxide colloid and filtrate;

[0038] (3) When the temperature of the filtrate is adjusted to 44°C, add sulfate-reducing bacteria fermentation yeast liquid, seal and stand until the COD concentration is 2.8g / L, filter to obtain PbS, then seal and stand until the COD concentration is 1.3g / L, Filtration to obtain CuS and metaaluminate liquid.

[0039] Said ad...

Embodiment 3

[0047] A method for treating sulfur ore wastewater with fermented yeast liquid, the steps are:

[0048] (1) Add activated carbon to the mine wastewater and stir for 0.4h at a stirring speed of 80r / min, filter to obtain particulate matter precipitation and liquid;

[0049](2) Transfer the liquid in step (1) into a sedimentation tank where rice straw is laid, raise the temperature to 65°C, add Thiobacillus ferrooxidans fermentation yeast liquid and stir for 3-8 hours, the stirring speed is 40r / min, and let it stand for 8 hours Finally, add a buffer solution with a concentration of 30% and stir for 38 minutes, then filter to obtain ferric hydroxide colloid and filtrate;

[0050] (3) When the temperature of the filtrate is adjusted to 42°C, add sulfate-reducing bacteria fermentation yeast liquid, seal and stand until the COD concentration is 3.0g / L, filter to obtain PbS, then seal and stand until the COD concentration is 1.6g / L, Filtration to obtain CuS and metaaluminate liquid. ...

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PUM

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Abstract

The invention relates to sulfur mine wastewater treatment technology, in particular to a method for treating sulfur mine wastewater by fermentation mother liquid. The method includes the steps: adding activated carbon into the mine wastewater, and stirring and filtering the wastewater to obtain particle deposits and liquid; transferring the liquid into a settling tank with rice straws, heating the settling tank to reach the temperature of 30-60 DEG C, adding thiobacillus ferrous oxide fermentation mother liquid, stirring the liquid for 3-8 hours, standing for 5-10 hours, adding buffer solution with the concentration of 20-30%, stirring the solution for 20-40 minutes and then filtering the solution to obtain ferric hydroxide colloid and filtrate; adding sulfate reducing bacteria fermentation mother liquid while adjusting the temperature of the filtrate to range from 42 DEG C to 50 DEG C, hermetically standing until the concentration of COD (chemical oxygen demand) is 2.8-3.0g / L, filtering the solution to obtain PbS, hermetically standing until the concentration of the COD is 1.3-1.6g / L, and filtering the solution to obtain CuS and meta-aluminate liquid. The method has the advantages of high heavy metal removal rate, easiness in recovery, low cost and no pollution.

Description

technical field [0001] The invention relates to the treatment technology of sulfur ore wastewater, in particular to a method for treating sulfur ore wastewater with fermented yeast liquid. Background technique [0002] Sulfur ore wastewater comes from the oxidation of air and bacteria during the mining, transportation, waste rock discharge, and tailings storage of sulfur ore to form a liquid containing high concentrations of sulfate and heavy metal ions. The usual treatment method is milk of lime neutralization method, which makes heavy metal ions precipitate out as hydroxides. This method is simple to operate and easy to separate heavy metals, but the amount of lime is large, which increases the cost of treatment, and the separation effect of heavy metals is poor. The rate is about 60%. At the same time, a large amount of calcium sulfate is produced, which brings potential secondary pollution risks to the environment. [0003] Therefore, many researchers try to find new tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C22B13/00C22B19/30C22B15/00C22B7/00
CPCY02P10/20
Inventor 袁再六
Owner 那坡县誉桂农业科技有限公司