Biological flocculation treatment method for coal preparation waste water

A technology of biological flocculation and treatment method, which is applied in the application field of microbial science, can solve the problems of difficult degradation, high cost, and harm, and achieve the effect of no secondary pollution

Inactive Publication Date: 2015-02-04
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current slime water treatment system can effectively realize the closed-circuit circulation of the slime water only by using flocculants for treatment. Since the slime water process is affected by many factors, the slime water treatment system of the coal preparation plant has become the most complex and cost-intensive process in the whole plant. Most expensive, most expensive to produce, and most difficult to manage
[0003] At present, the flocculants commonly used in coal slime water treatment include inorganic polymer flocculants, natural polymer flocculants, and synthetic polymer flocculants, but these flocculants all have certain deficiencies, that is, inorganic flocculants have poor treatment efficiency, It is expensive, has certain hazards, and has problems such as eliminating one kind of pollutant and bringing another kind of pollutant at the same time; polymer flocculants such as polyacrylamide residual monomers in water are not easy to be degraded, and have strong neurotoxicity. Toxicity, but also has a strong "three-induced" effect

Method used

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  • Biological flocculation treatment method for coal preparation waste water
  • Biological flocculation treatment method for coal preparation waste water
  • Biological flocculation treatment method for coal preparation waste water

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0014] Specific Example 1 Determination of Coal Preparation Wastewater Bioflocculant Flocculation Activity

[0015] The coal slime water used was obtained from the flotation tailing coal slime water of Wangfenggang Coal Preparation Plant of Huainan Mining Group, Anhui Province. The relevant properties of slime water are shown in Table 1.

[0016] Table 1 Relevant properties of slime water

[0017]

[0018] The particle size composition and ash analysis of the coal slime are shown in Table 2.

[0019] Table 2 The particle size composition and ash analysis of coal slime

[0020]

[0021] Paenibacillus polymyxa was picked from the slant culture medium with an inoculation needle and inoculated into a corresponding 250ml Erlenmeyer flask filled with 100ml liquid medium, and cultured in a 30°C constant temperature shaking incubator at a rotation speed of 160rpm for 36h.

[0022] Put 90mL of slime water in a beaker, add 4mL of W(CaCl 2 ) = 2% coagulant aid, stir at a slow s...

specific Embodiment 2

[0030] Specific example 2 Determination of flocculation activity of coal preparation wastewater biological flocculant

[0031] The slime water used was obtained from the flotation tailings slime water of Huainan Wangfenggang Coal Preparation Plant. The water-related properties of coal slime are shown in Table 1, and the particle size composition and ash analysis of coal slime are shown in Table 2.

[0032] Use an inoculation needle to pick Aspergillus niger strains from the slant culture medium and inoculate them into corresponding 250ml Erlenmeyer flasks filled with 100ml liquid medium, and cultivate them in a constant temperature shaking incubator at 28°C at a rotation speed of 160rpm for 2 days.

[0033] Put 90mL of slime water in a beaker, add 4mL of W(CaCl 2 ) = 2% coagulation aid, stir slowly for 1min, then add 3mL of the broken solution of Aspergillus niger culture solution, add coal slime water to 100mL, adjust the pH value of coal slime water to 8, stir slowly with a...

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Abstract

The invention relates to the field of microbiological science and in particular relates to a biological flocculation treatment method for coal preparation waste water. The method comprises the following steps: respectively preparing biological flocculants for coal from a Paenibacillus polymyxa culture solution and an Aspergillus niger culture solution, and respectively adding the biological flocculants into the coal preparation waste water for carrying out a flocculability test while controlling the test conditions. In combination with an infrared spectrum, chemical component analysis is performed on the biological flocculants for coal, thereby obtaining the result that both the biological flocculants for coal prepared from the Paenibacillus polymyxa culture solution and the Aspergillus niger culture solution have a good treatment effect on the coal preparation waste water.

Description

technical field [0001] The invention belongs to the field of microbial science applications, and in particular relates to a biological flocculation treatment method for coal preparation wastewater. Background technique [0002] For a long time, the purification of slime water has been difficult to solve. The main reason is that with the improvement of coal preparation mechanization, the proportion of fine coal is increasing. Coal slime water concentrates the finest and most difficult-to-handle fine particles in raw coal. Because these particles have fine particle size, high ash content, high viscosity, and are difficult to settle, they are extremely difficult to treat with conventional sedimentation, recovery, and dehydration equipment. The current slime water treatment system can effectively realize the closed-circuit circulation of the slime water only by using flocculants for treatment. Since the slime water process is affected by many factors, the slime water treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F3/34C02F2305/06
Inventor 张东晨陈占闫佳王涛侯志翔
Owner ANHUI UNIV OF SCI & TECH
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