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A method for removing acid red 3r by straw adsorption coupled with fungal fermentation

A technology of acid red and straw, applied in the direction of microorganism-based methods, fungi, chemical instruments and methods, etc., can solve the problems of water pollution, toxicity, and reduce water transparency, etc., achieve low cost, easy operation, and eliminate harmful pollution Effect

Active Publication Date: 2018-06-29
NANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acid red 3R is a commonly used azo dye. Its molecular structure contains azo chromophoric groups and benzene ring structures. A small amount of acid red 3R will cause serious water pollution, significantly reduce water transparency, and is toxic

Method used

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  • A method for removing acid red 3r by straw adsorption coupled with fungal fermentation

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Experimental program
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Effect test

Embodiment 1

[0022] 1. Pretreatment of straws: straws (rice straws, wheat straws and corn straws) are washed, dried and crushed, and passed through a 40-mesh sieve to obtain straw powder.

[0023] 2. Adsorption of dyes: Weigh 10.0 g of straw powder respectively, according to the solid-liquid ratio of 1:500 ( m / v , g / mL) was added to the wastewater solution with acid red 3R concentration of 100 mg / L, pH 3.5, and NaCl concentration of 1.5 mol / L, at a temperature of 30 °C, a stirring speed of 150 r / min, and an adsorption time of 4 h. The adsorption capacities of rice straw, wheat straw and corn straw were 30.2 mg / g, 39.7 mg / g and 34.6 mg / g, respectively.

[0024] 3. Cultivation of Phanerochaete chrysosporium: At 30°C, cultivate Phanerochaete chrysosporium on a potato dextrose agar plate for 7 days, then use a puncher with a diameter of 1.0 cm to punch holes on the agar plate to obtain a diameter of 1.0 cm. bacteria flakes.

[0025] 4. Solid-state fermentation: filter the above adsorption s...

Embodiment 2

[0027] 1. Pretreatment of straws: straws (rice straws, wheat straws and corn straws) are washed, dried and crushed, and passed through a 40-mesh sieve to obtain straw powder.

[0028] 2. Adsorbed dyes: Weigh 20.0 g of straw powder respectively, according to the solid-liquid ratio of 1:150 ( m / v , g / mL) was added to the wastewater solution with acid red 3R concentration of 200 mg / L, pH 6.0, and NaCl concentration of 0 mol / L, at a temperature of 50 °C, a stirring speed of 200 r / min, and an adsorption time of 6 h. The adsorption capacities of rice straw, wheat straw and corn straw were 19.2 mg / g, 23.3 mg / g and 24.0 mg / g, respectively.

[0029] 3. Cultivation of Phanerochaete chrysosporium: At 30°C, cultivate Phanerochaete chrysosporium on a potato dextrose agar plate for 7 days, then use a puncher with a diameter of 1.0 cm to punch holes on the agar plate to obtain a diameter of 1.0 cm. bacteria flakes.

[0030] 4. Solid-state fermentation: filter the above adsorption solution...

Embodiment 3

[0032] 1. Pretreatment of straws: straws (rice straws, wheat straws and corn straws) are dried and crushed and passed through a 40-mesh sieve to obtain straw powder.

[0033] 2. Dye adsorption: Weigh 20.0 g of straw powder respectively, according to the solid-liquid ratio of 1:300 ( m / v , g / mL) was added to the wastewater solution with acid red 3R concentration of 200 mg / L, pH 4.0, and NaCl concentration of 1.0 mol / L, at a temperature of 40 °C, a stirring speed of 200 r / min, and an adsorption time of 5 h. The adsorption capacities of rice straw, wheat straw and corn straw were 31.8 mg / g, 40.5 mg / g and 39.4 mg / g, respectively.

[0034] 3. Cultivation of Phanerochaete chrysosporium: At 30°C, cultivate Phanerochaete chrysosporium on a potato dextrose agar plate for 7 days, then use a puncher with a diameter of 1.0 cm to punch holes on the agar plate to obtain a diameter of 1.0 cm. bacteria flakes.

[0035] 4. Solid-state fermentation: filter the above adsorption solution to ob...

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Abstract

The invention discloses a method for removing acid red 3R by straw adsorption coupled fungus fermentation, belonging to the technical field of industrial wastewater treatment. The method comprises the following main steps: pretreating straws, adsorbing dyes, culturing Phanerochaete chrysosporium and carrying out solid state fermentation. The crop straws with abundant sources and low cost are used as a biological adsorbent to adsorb and remove acid red 3R in wastewater. After the straws adsorb the acid red 3R, filtration is carried out, the Phanerochaete chrysosporium is inoculated into the filter residues, and the solid state fermentation is carried out, so that the acid red 3R is degraded in the fermentation process. The method is based on straw adsorption and fungus solid state fermentation, removes the acid red 3R in the water body, eliminates the harmful pollution of the acid red 3R on the environment, and has the advantages of simple process, low cost, environment friendliness, wide prospects and the like.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a method for removing acid red 3R by straw adsorption coupled with fungal fermentation. technical background [0002] Crop straw is the main by-product of food production, and the annual amount is about 6.2×10 8 Ton. Crop stalks come from a wide variety of sources, among which rice stalks, wheat straws and corn stalks account for about 75%. These straws can be used as cooking and heating fuels for farmers, but most of the straws are not effectively utilized and are piled up or burned on the spot, causing serious pollution to the ecological environment. Therefore, the development and reuse of crop straws is of great significance to improve the ecological environment and realize the sustainable development of agriculture. [0003] Printing and dyeing wastewater is an important aspect of industrial wastewater, which is produced in dye productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F11/02C12N1/14C12R1/645
CPCC02F1/001C02F1/286C02F9/00C02F11/02C02F2101/308C02F2301/08C12N1/14
Inventor 李慧星许彬杜朝军刘建连李斌
Owner NANYANG INST OF TECH
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