Method for purifying slime water by compounding biological and abiological flocculants of coal

A technology of biological flocculant and coal slime water, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as interference, inability to achieve large-scale use, etc., and achieve reduced conditions The effect of limiting, reducing usage, and reducing secondary pollution

Active Publication Date: 2014-07-23
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microbial flocculants have the characteristics of good flocculation, degradability, no secondary pollution, safety and harmlessness, etc. However, micr

Method used

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  • Method for purifying slime water by compounding biological and abiological flocculants of coal
  • Method for purifying slime water by compounding biological and abiological flocculants of coal
  • Method for purifying slime water by compounding biological and abiological flocculants of coal

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] 1) Take 90 mL of evenly stirred slime water and add 2% CaCl 2 3mL of coagulant aid, stir for 1 min with a slow magnetic stirrer;

[0029] 2) Add 2mL of coal biological flocculant, add slime water to 100mL, adjust the pH value of the slime water to 5 with a pen-type pH meter, then stir slowly for 5 minutes with a magnetic stirrer, and add 0.05mL of non-biological flocculant polyacrylamide , Stir well.

[0030] 3) Let stand for 30 minutes to absorb the supernatant, and use a UV-5100 ultraviolet spectrophotometer to measure the absorbance of the supernatant at 660 nm. The flocculation rate is 93.57%. Under other conditions unchanged, only adding 2 mL of the coal bioflocculant Phanerochaete chrysosporium, the flocculation rate obtained is 56.65%.

Example Embodiment

[0031] Example 2

[0032] 1) Take 90 mL of evenly stirred slime water, and then add 2% CaCl 2 2mL of coagulant aid, stir for 1 min with a slow magnetic stirrer;

[0033] 2) Add 1mL of coal biological flocculant, add slime water to 100mL, adjust the pH value of the slime water to 7 with a pen-type pH meter, then stir slowly with a magnetic stirrer for 5 minutes, and add 0.05mL of non-biological flocculant polyacrylamide , Stir well.

[0034] 3) Let it stand for 30 minutes to absorb the supernatant. Use a UV-5100 ultraviolet spectrophotometer to measure the absorbance of the supernatant at 660 nm. The flocculation rate is 93.23%. Under other conditions unchanged, only adding 1 mL of the coal bioflocculant Phanerochaete chrysosporium, the flocculation rate obtained was 61.09%.

Example Embodiment

[0035] Example 3

[0036] 1) Take 90 mL of evenly stirred slime water, and then add 2% CaCl 2 1mL of coagulant aid, stir for 1min with a slow magnetic stirrer;

[0037] 2) Add 3mL of coal biological flocculant, add slime water to 100mL, adjust the pH value of the slime water to 6 with a pen-type pH meter, then stir slowly with a magnetic stirrer for 5 minutes, add 0.05mL of non-biological flocculant polyacrylamide , Stir well.

[0038] 3) Let it stand for 30 minutes to absorb the supernatant, and measure the absorbance of the supernatant at 660nm with a UV-5100 ultraviolet spectrophotometer, and the flocculation rate is 85.81%. Under other conditions unchanged, only 3mL of the coal bioflocculant Phanerochaete chrysosporium was added, and the flocculation rate was 65.63%.

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Abstract

The invention relates to a method for purifying slime water by compounding biological and abiological flocculants of coal. The method comprises the following steps: by taking polyacrylamide (PAM) and phanerochaete chrysosporium which are in the volume ratio of 1:X as compounding flocculants, adding 1ml to 4ml of CaCl2, which accounts for 2% of the mass percent of the compounding flocculants under a certain slime water concentration; regulating the PH (Potential Of Hydrogen) of the slime water to reach 4 to 8 and other external conditions; and carrying out flocculation sedimentation on the slime water under a series of biological and abiological actions. According to the method, the adding quantity of the abiological flocculants of the coal is reduced while the flocculation effect of the slime water in a coal preparation plant is not influenced, so that the limits of various factors to the flocculation effect are decreased; the application range of the compounding flocculants is enlarged; and the pollution and the toxic action of inorganic salts and organic flocculants to environments are relieved.

Description

technical field [0001] The invention relates to a compound application method of coal biological and non-biological flocculants. Background technique [0002] Coal slime water treatment is an important link in coal preparation plant. Because the slime water concentrates the finest and most difficult particles in the raw coal, these particles are extremely difficult to be treated by conventional sedimentation, recovery and dehydration equipment due to their fine particle size, high ash content, high viscosity, and difficulty in settling. In order to effectively realize the closed-circuit circulation of the slime water, the slime water is treated with flocculants, which can achieve a good treatment effect. [0003] The flocculants used in coal slime water treatment in the prior art mainly include inorganic flocculants represented by aluminum salts, iron salts and their hydrolyzed polymers and organic polymer flocculants represented by polyacrylamide and their derivatives. Be...

Claims

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Application Information

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IPC IPC(8): C02F3/34
Inventor 张东晨闫佳王涛侯志翔周倩倩
Owner ANHUI UNIV OF SCI & TECH
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