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A high-efficiency decolorization treatment process for liquor brewing wastewater

A technology for treating process and wastewater, applied in the field of high-efficiency decolorization and removal of organic matter, can solve the problems of unachievable decolorization effect, difficult engineering application, high cost, etc. The effect of the action of systemic biological depigmentation

Active Publication Date: 2016-09-07
桂润环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After testing, commonly used decolorization treatment processes include oxidation (such as ozone, Fenton's reagent, hydrogen peroxide), reduction (sodium sodium sulfite, ferrous sulfate, etc.), coagulation (organic or non-polymer decolorizing agent, composite decolorizing agent) can not achieve the ideal decolorization effect, activated carbon adsorption has a certain decolorization effect, in the early stage of liquor production, when the chroma of wastewater is low, the chroma can generally be treated to less than 20 times, in the later stage of liquor production, the chroma of wastewater discharged When it is darker, it is difficult to stabilize the chromaticity below 20 times, and it has the disadvantages of easy saturation, high cost, and difficulty in regeneration, making it difficult for engineering application

Method used

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  • A high-efficiency decolorization treatment process for liquor brewing wastewater
  • A high-efficiency decolorization treatment process for liquor brewing wastewater
  • A high-efficiency decolorization treatment process for liquor brewing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0025] Treated water volume: 1m 3 / h

[0026] Liquor brewing wastewater enters the anaerobic pool after pretreatment such as screening, slag removal, and pH adjustment. After anaerobic treatment, most of the organic matter and part of the color are removed, and then enters the aerobic pool for aerobic decomposition. An MBR device is installed at the end of the aerobic tank, and the MBR device is connected to a self-priming pump. The activated sludge in the mixed solution of the aerobic tank is intercepted by the MBR membrane, and the clear water passing through the MBR is sucked into the storage tank by the self-priming pump, and then passed through the booster pump. It is sent to the nanofiltration membrane filtration device for membrane separation, in which particles above 0.5-5 nanometers, including color components and other particles, are intercepted by the nanofiltration membrane to form concentrated water and then returned to the anaerobic pool for further processing; ...

Embodiment 1

[0027] The device used in Embodiment 1: the installed power is 1.0KW, and the components of the device are shown in Table 1. The schematic diagram of the connection structure of each part of the device is shown in image 3 shown.

[0028] Table 1: MBR+NF device

[0029]

[0030] The treatment effect of Example 1 on wastewater is shown in Table 2.

[0031] Table 2: Decolorization effect of MBR+NF

[0032] water sample

pH

COD Cr (mg / l)

Chroma (dilution factor)

raw water

6.60

2467

128

Anaerobic pool effluent

7.40

276

64

MBR outlet

7.60

161.7

32

Nanofiltration effluent

7.50

59.2

2

[0033] The process of Example 1 is compared with the conventional waste water treatment process, and the obtained results are shown in Table 3.

[0034] Table 3: Comparative test decolorization effect

[0035]

Embodiment example 2

[0037] Treated water volume: 1m 3 / h

[0038] Liquor brewing wastewater enters the anaerobic pool after pretreatment such as screening, slag removal, and pH adjustment. After anaerobic treatment, most of the organic matter and part of the color are removed, and then enters the aerobic pool for aerobic decomposition. An MBR device is installed at the end of the aerobic tank, and the MBR device is connected to a self-priming pump. The activated sludge in the mixed solution of the aerobic tank is intercepted by the MBR membrane, and the clear water passing through the MBR is sucked into the storage tank by the self-priming pump, and then passed through the booster pump. It is sent to the ultrafiltration membrane filtration device for membrane separation, in which particles above 0.5-5 nanometers, including color components and other particles, are intercepted by the ultrafiltration membrane to form concentrated water and then returned to the anaerobic pool for further processing;...

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Abstract

The invention relates to a high-efficiency decolorization treatment process for liquor brewing wastewater. After pretreatment, the brewing wastewater enters an anaerobic pool, removes most of the organic matter and part of the chroma under the action of anaerobic microorganisms, and then enters the aerobic pool for further oxidation and decomposition. . The mixed liquid in the aerobic tank enters the membrane-bioreactor for solid-liquid separation, and the suspended activated sludge in the mixed liquid is intercepted to obtain clear water with a turbidity less than 1NTU, which is finally separated by nanofiltration membrane or ultrafiltration membrane filtration device , the color of the clear water after membrane separation is 2-4 times, which is better than the 20 times limit value specified in Table 3 of the national standard GB27631-2011; the concentrated water filtered by the membrane is returned to the anaerobic, aerobic, and MBR biological treatment systems for further treatment. The decolorization treatment process adopted in the present invention can be designed in a modular manner, occupies less land, has low operating costs, and is conveniently connected to an existing wastewater biological treatment system, which is of great significance for improving the standard of existing liquor wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment process for highly efficient decolorization and organic matter removal of liquor brewing wastewater. Background technique [0002] In the brewing process of Maotai-flavored liquor, due to the repeated fermentation and distillation, the discharged wastewater has a higher chroma. It is difficult for the biochemical treatment process to reduce the chroma to less than 20 times as specified in Table 3 of the "Discharge Standard of Water Pollutants for Fermented Alcohol and Liquor Industry" (GB 27631-2011), and sometimes even 40 times as specified in Table 2. Decolorization is a long-standing and difficult problem in the treatment of Maotai-flavor liquor brewing wastewater. After testing, commonly used decolorization treatment processes include oxidation (such as ozone, Fenton's reagent, hydrogen peroxide), reduction (sodium sodium sulfite, ferrous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/32
Inventor 魏江州张小平孙帮周
Owner 桂润环境科技股份有限公司