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A printing and dyeing wastewater adsorption treatment agent and preparation method thereof

A technology for adsorption treatment and printing and dyeing wastewater, applied in the field of environmental pollution control, can solve the problems that the adsorbent is difficult to achieve decolorization and COD removal effect, the COD removal effect of chemical oxygen demand is not very good, and the COD value of printing and dyeing wastewater is not very obvious. , to achieve good treatment effect, reduce the level of heavy metals, and stabilize the air

Active Publication Date: 2022-02-15
广州市中绿环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Adsorbents commonly used in the adsorption method mainly include activated carbon, natural clay, chitosan and other substances. These adsorbents have a certain effect on the decolorization of printing and dyeing wastewater, but the effect of reducing the COD value of printing and dyeing wastewater is not very obvious, especially the single use of more than one adsorption It is difficult to achieve the ideal decolorization and COD removal effect, especially for the mixed wastewater containing multiple dyes, the decolorization rate is low. Therefore, the development of efficient and cheap adsorption materials has become a hot spot of widespread concern.
[0003] The Chinese patent application with the publication number CN 101716487 A discloses a steel slag composite adsorbent and its method for treating printing and dyeing wastewater. The adsorbent has a good treatment effect on printing and dyeing wastewater, with a decolorization rate of 99.2%, but its chemical oxygen demand COD removal effect is not very good, and the COD removal rate is only 82.5%

Method used

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  • A printing and dyeing wastewater adsorption treatment agent and preparation method thereof
  • A printing and dyeing wastewater adsorption treatment agent and preparation method thereof
  • A printing and dyeing wastewater adsorption treatment agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation of embodiment 1 distiller's grain activated carbon

[0029] Add 3 times its weight volume fraction to fresh distiller's grains and be 75% ethanol aqueous solution, leave standstill at room temperature 6h to carry out degreasing treatment, filter, remove filtrate, then add the NaOH solution that the mass concentration of 3 times of filter residue weight is 10%, at room temperature Soak under water for 24 hours to deproteinize, then wash with water until the pH is neutral, dry the degreased and deproteinized distiller's grains, put them in a tube furnace, pre-flow nitrogen, and quickly heat up to the preset temperature of 300 °C Roast for 3 hours, cool and take out to obtain distiller's grain activated carbon.

Embodiment 2

[0030] The preparation of embodiment 2 distiller's grain activated carbon

[0031] Add the volume fraction of 1 times of its weight to fresh distiller's grains and be 80% ethanol solution, leave standstill at room temperature for 12h to carry out degreasing treatment, filter, remove filtrate, then add the NaOH solution that the mass concentration of 4 times of filter residue weight is 5%, at normal temperature Soak under water for 36 hours for deproteinization treatment, then wash with water until the pH is neutral, dry the degreased and deproteinized distiller's grains, put them in a tube furnace, pre-flow nitrogen, and quickly heat up to the preset temperature of 500 °C Roast for 2 hours, cool and take out to obtain distiller's grain activated carbon.

Embodiment 3

[0032] The preparation of embodiment 3 mugwort leaves wax

[0033] Take fresh Artemisia argyi leaves, crush them and pack them into a column, then use cyclohexane to circulate and elute the packed medicinal material column. After the liquid comes out, measure the flow rate of the effluent liquid, and after circularly eluting 5BV, connect a silica gel column for adsorption , after continuing to circulate and elute 3BV, remove the medicinal material column, empty the cyclohexane in the medicinal material column with an air pump, and load the cyclohexane into the silica gel column for adsorption; finally take another cyclohexane to wash the wax in the silica gel column After the color of the eluted eluent becomes lighter, empty the cyclohexane in the column with an air pump, merge with the eluent, and recover the cyclohexane with a rotary evaporator to obtain the mugwort wax.

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Abstract

The invention discloses an adsorption treatment agent for printing and dyeing wastewater and a preparation method thereof. The printing and dyeing wastewater adsorption treatment agent comprises the following components in weight percentage: 30-60% of bio-based adsorbent, 20-50% of silicon carbide composite iron base and 10-30% of ceramsite. The bio-based adsorbent is composed of distiller's grain activated carbon, mugwort wax and pectin in a mass ratio of (1-3):(3-5):(1-2). The silicon carbide composite iron base is composed of electrolytic iron powder, silicon carbide and water glass in a mass ratio of (1.5-2.5):(0.5-1):(0.3-0.6). The printing and dyeing wastewater adsorption treatment agent of the present invention can effectively reduce the content of COD in the printing and dyeing wastewater and decolorize it, and has a good treatment effect on various printing and dyeing wastewater, and is not affected by the chroma, water quality, pH, water temperature and water volume of the printing and dyeing wastewater. Moreover, the cost is low, the adsorption capacity is large, and the production process is simple.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and in particular relates to an adsorption treatment agent for printing and dyeing wastewater and a preparation method thereof. Background technique [0002] my country is the largest country in the textile printing and dyeing industry, and the textile printing and dyeing industry is a large discharge of industrial wastewater, accounting for 35% of my country's total industrial wastewater discharge. The textile printing and dyeing industry has become one of the 12 key industries in the national environmental protection plan. Printing and dyeing wastewater has complex components, large chroma, high concentration, contains many refractory substances, and has low biodegradability. The domestic treatment of dye wastewater is generally based on biological methods, supplemented by chemical methods, but the decolorization and COD removal effects are poor, and it is difficult for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F103/30
CPCB01J20/02B01J20/0229B01J20/20C02F1/288C02F2103/30B01J2220/4825
Inventor 何美英
Owner 广州市中绿环保有限公司
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