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Formula and preparation method of composite fungus straw bio-adsorbent

A biosorbent and straw technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of limiting cellulose adsorption, low straw adsorption performance, and hindering cellulose contact, etc., to achieve Avoid harsh culture conditions, low price, and improve the effect of adsorption efficiency

Inactive Publication Date: 2016-05-11
HEILONGJIANG HEIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the structure of crop straw, lignin surrounds cellulose to form a natural protective barrier, which hinders the contact between cellulose and external metal ions, and limits the adsorption of cellulose.
In addition, the hydrogen bonds between cellulose macromolecules, between cellulose and water molecules, and inside the cellulose macromolecules bind the hydroxyl groups with adsorption function on cellulose, resulting in low adsorption performance of crop straws.

Method used

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  • Formula and preparation method of composite fungus straw bio-adsorbent

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Comparison scheme
Effect test

Embodiment 1

[0017] The invention discloses a formula and a preparation method of a fungal straw composite biosorbent, and the specific method is as follows:

[0018] Material preparation: crush the dry straw with a universal grinder and pass through a 60-mesh sieve for later use;

[0019] Preparation of culture medium: Weigh 1 part of straw, 1 part of water, 0.05 part of nitrogen source, and 0.5 part of pH adjuster to blend, and spread it on a petri dish with a thickness of 0.5-1 cm. Dilute 3×10 6 cuf Aspergillus niger spores were inoculated on the surface of the solid medium;

[0020] Fermentation conditions: ferment and cultivate at 30°C for 3-7 days, dry at 50°C for 3-5 hours, and become a composite biosorbent for the symbiosis of straw and fungi.

Embodiment 2

[0022] The invention discloses a formula and a preparation method of a fungal straw composite biosorbent, and the specific method is as follows:

[0023] Material preparation: crush the dry straw with a universal grinder and pass through a 60-mesh sieve for later use;

[0024] Production medium: Weigh 1 part of straw, 3 parts of water, 0.1 part of nitrogen source, and 0.8 part of pH regulator to blend, and spread it on a petri dish with a thickness of 0.5-1cm, and mix 8×10 6 cuf Aspergillus niger spores were inoculated on the surface of the solid medium;

[0025] Fermentation conditions: ferment and cultivate at 30°C for 3-7 days, dry at 50°C for 3-5 hours, and become a composite biosorbent for the symbiosis of straw and fungi.

Embodiment 3

[0027] Experimental purpose and method: In order to verify the adsorption effect of fungal straw composite biosorbent on heavy metal-containing wastewater, this experiment uses fungal straw composite biosorbent to treat heavy metal wastewater containing chromium and copper, and 0.1g of agricultural waste and fungus-modified agricultural The waste composite biosorbent was added to 20mL of 100mg / L chromium solution and copper solution respectively at a temperature of 30°C and a rotation speed of 100rmp. After two hours of adsorption, the amount of metal ion adsorption was detected.

[0028] Experimental results: if figure 1 As shown, the adsorption capacity of the four groups a-d were 8.22mg / g and 12.64mg / g, 0.68mg / g and 3.2mg / g respectively, indicating that the adsorption capacity of agricultural wastes has been improved after biological modification.

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Abstract

The invention relates to the field of biological agents, and discloses a formula and a preparation method of a composite fungus straw bio-adsorbent. Agricultural wastes (corncobs, corn straws, rice straws and the like) are modified by virtue of a biological method, the agricultural wastes are used as a solid culture medium, Aspergillus niger is fermented, and the agricultural wastes are modified by utilizing an excreted and secreted product of the Aspergillus niger in the culture process, so that the adsorption efficiency of the wastes on heavy metal ions in waste water is improved, and the high-efficient and environment-friendly bio-adsorbent with low price is prepared.

Description

technical field [0001] The invention relates to the field of biological preparations, in particular to a formula and a preparation method of a fungal straw composite biosorbent. Background technique [0002] The main components of crop straw are cellulose, hemicellulose and lignin, and its surface contains -COOH, -OH, -NH 2 These substances have a strong affinity for metal ions, therefore, crop straw has an adsorption effect on heavy metal ions. However, in the structure of crop straw, lignin surrounds cellulose to form a natural protective barrier, which hinders the contact between cellulose and external metal ions, and limits the adsorption of cellulose. In addition, the hydrogen bonds between cellulose macromolecules, between cellulose and water molecules, and inside the cellulose macromolecules bind the hydroxyl groups with adsorption function on cellulose, resulting in low adsorption performance of crop straws. Therefore, how to improve the adsorption efficiency of ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J2220/4825B01J2220/4868C02F1/286C02F2101/20
Inventor 赵路阳任滨侨宋晓晓欧阳凤菊张晓臣金玉
Owner HEILONGJIANG HEIKE TECH CO LTD
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