Biological modified straw adsorbent, and reparation method and application thereof

A biological modification and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high cost of chemical modification, secondary pollution, etc., and achieve excellent adsorption performance and easy operation The effect of convenience and simple production process

Inactive Publication Date: 2013-01-02
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for preparing an adsorbent from biologically modified straw, which solves the problems of high cost and secondary pollution caused by traditional straw physical modification and chemical modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The naturally air-dried rice straw was crushed and sieved, and the diameter of the sieve hole was 1 cm. Fermentation substrate formula: straw powder (moisture content 12%) 10Kg, urea 100g, water 20L, inoculum 0.1Kg; Wherein, inoculum is the solid culture of Trichoderma koningii (Trichoderma koningii) CGMCC3.2774, product performance parameters are: The water content is less than 20%, and the spore content of the strain is greater than 10 9 Individual / g culture, the medium formula of solid culture is (Kg): rice straw powder 0.3, bran 0.7, water 2, pH natural; after mixing evenly, sterilize at 126°C for 2 hours. Knead the solid culture into fine particles and mix with straw powder evenly, then add water (urea has been completely dissolved in water), mix evenly again, put all the fermentation materials into plastic buckets, cover with plastic film, and ferment at a constant temperature of 28°C 7d, stop fermentation. After all the fermented materials are taken out and dri...

Embodiment 2

[0031]The wheat straw after being exposed to the sun was crushed and sieved, and the diameter of the sieve hole was 1 cm. Fermentation substrate formula: wheat straw powder (moisture content 15%) 10Kg, ammonium nitrate 150g, water 15L, inoculum 0.1Kg; Wherein, inoculum is the solid culture of Aspergillus niger (Aspergillus niger) CGMCC3.4309, and product performance parameter is : water content is less than 20%, the spore content of bacterial strain is greater than 1010 / g culture, the medium formula of solid culture is (Kg): rice straw powder 0.3, bran 0.7, water 2, pH natural; 126 after mixing evenly Sterilize at ℃ for 2h. Gently knead the solid culture by hand and crush it into small particles, then mix it with straw powder evenly, then add water (ammonium nitrate has been completely dissolved in water), and stir well to make the straw and water evenly mixed; put all the fermentation material into a plastic bucket During the fermentation process, the mouth of the barrel was...

Embodiment 3

[0035] Naturally air-dried rape stalks were crushed and sieved with a sieve hole diameter of 1.5 cm. Fermentation substrate formula: 10Kg of rapeseed straw powder (moisture content 13%), 400g of bran, 17L of water, 0.1Kg of inoculum; wherein, the inoculum is a solid culture of Rhizopus stolonife (Rhizopus stolonife) CICC 40317, product performance parameters For: water content less than 20%, spore content greater than 10 8 Individual / g culture, the medium formula of solid culture is (Kg): rice straw powder 0.3, bran 0.7, water 2, pH natural; after mixing evenly, sterilize at 126°C for 2 hours. Gently knead the solid culture by hand and break it into small particles, then mix it with straw powder and bran evenly, then add water and stir well, so that the straw powder, bran and water are evenly mixed; put all the fermented material into a plastic bucket, Cover the mouth of the barrel with a plastic film, ferment at a constant temperature of 28°C for 8 days, and stop the ferment...

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Abstract

The invention discloses a biological modified straw adsorbent, and a preparation method and application thereof. The method comprises the steps of: crushing the straw to prepare a straw powder; mixing the straw powder with a synergistic agent and water, and inoculating microbial strain for modification to conduct fermentation; and after the fermentation, taking out the modified straw powder and drying to prepare the adsorbent. The microbial strain is Trichoderma viride CGMCC3.5455, Trichoderma koningii CGMCC3.2774, Aspergillus niger CGMCC3.4309, Rhizopus stolonifer CICC40317, and Trichoderma koningii CICC 40108. The invention uses straw powder as a carbon source to conduct solid fermentation, so as to produce the adsorbent. The production process does not produce wastewater, waste gas or waste residue, and is energy-saving and environment-friendly. The prepared adsorbent has strong capacity, and can be used for treatment of tanning wastewater and dyeing wastewater.

Description

technical field [0001] The invention belongs to the technical field of straw reuse, and in particular relates to a biologically modified straw adsorbent and a preparation method and application thereof. Background technique [0002] The theoretical crop straw resources in my country are 820 million tons, of which 31.31% are discarded or burned on site. The resource utilization of straw has a long history in our country, but at present, there are few ways of high-value utilization, and the proportion is relatively low. Establish a new technology for efficient resource utilization of straw and develop new high-value straw products. It is the trend and development direction of changing the status quo of straw utilization. [0003] Straw is mainly composed of lignin, cellulose and hemicellulose, with complex structure, good stability, and high specific surface area, which has the development potential of excellent adsorbent. It is currently known that, for example, wheat straw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F103/24C02F103/30
Inventor 李加友于建兴沈洁陆筑凤
Owner JIAXING UNIV
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