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Method and use for preparing natural adsorption agent by zymolysis

An adsorbent, enzymatic hydrolysis technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. Non-toxic and harmless, environmentally friendly production process, and the effect of large adsorption capacity

Inactive Publication Date: 2008-08-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Except for a small amount of waste biomass used in papermaking, construction, textile and other industries or as roughage and firewood, most of the waste biomass is not effectively utilized, but rotted or burned in vain, and some also cause environmental pollution (such as incineration)

Method used

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  • Method and use for preparing natural adsorption agent by zymolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Using discarded tomato peels, apple peels, potato peels and other plant peels as raw materials, add a 1:1 mixed solution of 0.5mg / L cellulase and 0.5mg / L pectinase in the fermentation reactor, at 0.01mol / L Under the buffer solution of L acetic acid / sodium acetate solution (pH=5), the fermentation temperature is controlled at 30° C. and the stirring speed is 20 r / min, and the biomass is enzymatically hydrolyzed for 10 days. Add 100 mL of enzyme solution per gram of biomass raw material. Dissolving and removing polar components such as cellulose and pectin in biomass raw materials; the remaining components are mainly non-polar components, including aromatic plant lignin and fatty plant cutin; the obtained residue is processed After washing, filtering, drying and crushing, the natural adsorbent NS-1 is obtained.

Embodiment 2

[0027] Using discarded tomato peels, apple peels, potato peels and other plant peels as raw materials, add a 1:1 mixture of 2mg / L cellulase and 2mg / L pectinase in the fermentation reactor, and add 2mg / L of pectinase at 0.05mol / L Under the buffer solution of citric acid / sodium citrate (pH=3), the fermentation temperature was controlled at 40° C. and the stirring speed was 50 r / min, and the biomass was enzymatically hydrolyzed for 5 days. Add 50 mL of enzyme solution per gram of biomass raw material. Dissolving and removing polar components such as cellulose and pectin in biomass raw materials; the remaining components are mainly non-polar components, including aromatic plant lignin and fatty plant cutin; the obtained residue is processed After washing, filtering, drying and crushing, the natural adsorbent NS-2 is obtained.

Embodiment 3

[0029]Using discarded tomato peels, apple peels, potato peels and other plant peels as raw materials, add a 1:1 mixture of 8mg / L cellulase and 8mg / L pectinase in the fermentation reactor, and add Under acetic acid / sodium acetate solution or 0.5 mol / L citric acid / sodium citrate buffer solution (pH=3), the fermentation temperature was controlled at 50° C. and the stirring speed was 200 r / min, and the biomass was enzymatically hydrolyzed for 1 day. Add 10 mL of enzyme solution per gram of biomass raw material. Dissolving and removing polar components such as cellulose and pectin in biomass raw materials; the remaining components are mainly non-polar components, including aromatic plant lignin and fatty plant cutin; the obtained residue is processed After washing, filtering, drying and crushing, the natural adsorbent NS-3 is obtained.

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Abstract

The invention discloses a method and usage of preparing natural absorbent with enzymatic hydrolysis. Adding abandoned biomass and degrading enzyme solution into a fermentation reactor, and the pH value of the enzymolysis buffer solution is 3 to 6 under a enzymolysis temperature of 30-50 DEG C, and the natural absorbent is prepared through washing, filtering, drying and grinding after 1 to 10 days of stirring enzymolysis in 20 to 200r / min; the degradation enzyme is cellulose of 0.5 to 8mg / L, pectinase of 0.5 to 8mg / L or the mixing solution of the cellulose and the pectinase with a proportion of 1 to 1; 10 to 100mL degradation enzymes are added into every gram of abandoned biomass raw materials, which enables 2 to 20IU of active enzymes to be added into every gram of biomass raw material. The prepared natural absorbent are used for removing a micro amount of persistent organic pollutants in wastewater or drinking raw water and absorbing liquid organic pollutants leaked in accidents. The method and usage of preparing natural absorbent with enzymatic hydrolysis has the advantages of simple preparation method, low cost and environmental protection; the absorbent has strong absorption power, large capacity without toxicity or harm.

Description

technical field [0001] The invention relates to the preparation of an environmentally friendly adsorption material and its application in pollution control, in particular to a method for preparing a natural adsorbent by enzymolysis and its application. Background technique [0002] Persistent organic pollutants (POPs) are mostly carcinogenic, teratogenic, mutagenic, highly bioaccumulative and refractory, and widely exist in the environment. In 2001, representatives of more than 100 countries and regions signed the famous "Stockholm Convention" in Stockholm, Sweden, requiring all signatories to take various measures to strengthen international cooperation and jointly regulate and manage the production, use, trade and disposal of POPs disposal. Wastewater discharged from coking, pharmaceutical, chemical, and printing and dyeing industries often contains a large amount of persistent organic compounds. However, the existing wastewater treatment adsorption materials and drinking...

Claims

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Application Information

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IPC IPC(8): B01J20/24C02F1/28
Inventor 陈宝梁王银善李云桂陈再明
Owner ZHEJIANG UNIV
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