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Preparation method of modified fungus bran adsorbent for discoloring dye waste water

A dye wastewater and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., to achieve the effects of increased adsorption capacity, high stability and strong adsorption function

Inactive Publication Date: 2010-06-16
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of edible fungus bran modified as an adsorbent to decolorize dye wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The present embodiment adopts the composition by mass percentage of 20% of wheat straw, 20% of rice straw, 30% of sunflower stalk, 28% of cottonseed husk, 1% of brown sugar, and 1% of gypsum powder. Select black fungus chaff with white hyphae, solid material, no mildew and rot, remove the plastic bag film outside the fungus bag, spread it out, and dry it in an incubator. After drying, the water content of the fungus chaff is 1.2- 1.6%. The dried fungus chaff is crushed by a pulverizer, and the diameter of the granular fungus chaff is 0.5-3.5cm. Soak the pulverized fungus chaff in NaOH solution with a concentration of 5.2 mol / L and a temperature of 90-99° C. for 2 hours. Wash with tap water until neutral, and dry at 70°C-75°C for 10 hours.

[0017] Mix 30 kg of alkalized fungus chaff and 10 liters of epichlorohydrin into 350 L of NaOH solution with a concentration of 1.6 mol / L, then add 10 liters of absolute ethanol, and stir and react at 45-55 °C for 6 hours. 60 rpm....

Embodiment 2

[0020] Present embodiment adopts mass percent to be composed of rice bran 35%, bagasse 35%, wheat bran 25%, urea 1%, cottonseed cake 2%, lime powder 1% and calcium carbonate 1% the culture medium waste after producing Flammulina velutipes Flammulina velutipes chaff. Select Flammulina velutipes chaff with white hyphae, solid material, no mildew and rot, remove the plastic bag film outside the fungus bag, and dry in the sun. After drying, the water content of the chaff is 0.3-2%. The dried fungus chaff is crushed by a pulverizer, and the diameter of the granular fungus chaff is 0.60-1.0cm. Soak the pulverized fungus chaff in NaOH solution with a concentration of 2mol / L and a temperature of 50-55°C for 8 hours. Wash with tap water until neutral, and dry at 80°C-90°C for 8 hours.

[0021] Mix 20 kg of alkalized fungus chaff and 1.2 liters of epichlorohydrin into 200 L of NaOH solution with a concentration of 2.5 mol / L, then add 1.2 liters of absolute ethanol, and stir and react ...

Embodiment 3

[0024] The culture medium waste Bailing mushroom chaff after the production of Bailing mushroom is adopted, and the mass percentage is composed of 80% of cottonseed hulls, 10% of sawdust, 8% of rice bran, 1% of brown sugar and 1% of gypsum. Select rod-shaped Bailing mushroom chaff with white hyphae, solid material, no mildew and rot, remove the plastic bag film outside the fungus bag, and take warm

[0025] Oven drying, after drying, the moisture content of the fungus chaff is 1-2%. The dried fungus chaff is crushed by a pulverizer, and the diameter of the granular fungus chaff is 1.2-4.0cm. The crushed fungus chaff is soaked in NaOH solution with a concentration of 4 mol / L and a temperature of 55-65° C. for 4 hours. Wash with tap water until neutral, and dry at 60°C-70°C for 10 hours.

[0026] Mix 50 kg of alkalized fungus chaff and 6 liters of epichlorohydrin into 500 L of NaOH solution with a concentration of 1.75 mol / L, then add 6 liters of absolute ethanol, and stir the...

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Abstract

The invention relates to a preparation method of a modified fungus bran adsorbent for discoloring dye waste water, belonging to the technical field of environmental protection. The preparation method comprises the following concrete steps: alkalizing and swelling the edible fungus bran which is dried and crushed in an excess NaOH solution at 50-120 DEG C for 1-12 hours, carrying out cationic modification on the swollen edible fungus bran, washing the swollen edible fungus bran with water, and drying the swollen edible fungus bran to obtain the modified fungus bran adsorbent for discoloring dye waste water. In the invention, the processed edible fungus bran is used as a raw material for preparing the adsorbent, wherein celluloses and thalli contained in the fungus bran are mainly used. By using the fungus bran for preparing the adsorbent, agricultural wastes are reasonably used, and pollution sources are eliminated. The invention has the advantages of simple process, low cost, economy,practicability and the like. After cationic modification, active groups in the fungus bran are increased, and the adsorbent has high stability, good absorption effect and wide application range, is renewable and can be widely used for treating dye waste water.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of a modified fungus chaff adsorbent used for decolorizing dye wastewater. Background technique [0002] Edible fungus chaff, also known as waste tube, mushroom residue, etc., is the waste left after the cultivation of various edible fungi. The main substrates of edible mushroom cultivation raw materials are cottonseed hulls, sawdust, straw, corncobs, bagasse, various agricultural straws, and industrial wastes (such as distiller's grains, vinegar grains, etc.). After the cultivation of these substrates, most of the easily decomposed and transformed substances have been absorbed and utilized by edible fungi during the cultivation process, and the main components of the remaining fungus chaff are cellulose, hemicellulose, lignin and bacterial protein. If these edible fungus chaffs are randomly discarded or piled up, it will not onl...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 张惠文阮晓东蔡颖慧张晓黎李旭苏振成
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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