Method and application for extracting cellulose from manioc waste

A cassava residue and cellulose technology is applied in the direction of using microorganism/enzyme cellulose treatment, fiber raw material treatment, chemical instruments and methods, etc., to achieve the effect of reducing pollution, improving adsorption effect, and improving economic and environmental value.

Active Publication Date: 2015-11-11
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cellulose-based adsorption materials mainly use bagasse cellulose, pomelo peel cellulose, ramie cellulose, bamboo cellulose, cotton cellulose, banana stem cellulose, sunflower stem cellulose, peanut shell cellulose, sawn cellulose, etc. There are few reports on the preparation of heavy metal adsorption materials by using cassava slag cellulose. Using was

Method used

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  • Method and application for extracting cellulose from manioc waste
  • Method and application for extracting cellulose from manioc waste
  • Method and application for extracting cellulose from manioc waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Using waste cassava residues as raw materials, cassava residue cellulose and heavy metal adsorption materials were prepared according to the following method:

[0053] 1. Extraction of cassava residue cellulose

[0054] Raw material pretreatment: wash cassava dregs with distilled water several times to remove impurities and soluble substances, then put them in a constant temperature drying oven at 80°C for 8 hours, crush them through a 40-mesh sieve, and store them in a desiccator for later use .

[0055] Weigh 10.00g of pretreated cassava residues, add 60ml of distilled water and boil for 5 minutes to fully gelatinize the starch in the cassava residues, add 100ml of 0.8wt% α-amylase solution, at 60°C, pH6.0 and 105W ultrasonic, Enzymolysis for 45min, inactivate enzyme (100°C, 5min), centrifuge (4000r / min, 20min), discard the supernatant, add 100ml of 5% NaOH solution, alkaline hydrolyze at 70°C for 90min, wash, and naturally Settle, discard the supernatant, filter, d...

Embodiment 2

[0065] Using waste cassava residues as raw materials, cassava residue cellulose and heavy metal adsorption materials were prepared according to the following method:

[0066] 1. Extraction of cassava residue cellulose

[0067] Raw material pretreatment: wash cassava dregs with distilled water several times to remove impurities and soluble substances, then put them in a constant temperature drying oven at 80°C for 8 hours, crush them through a 40-mesh sieve, and store them in a desiccator for later use .

[0068] Weigh 10.00g of pretreated cassava residue, add 40ml of distilled water and boil for 10min to fully gelatinize the starch in the cassava residue, add 100ml of 1.0wt% α-amylase solution, at 50°C, pH7.0 and 150W ultrasonic, Enzyme hydrolysis for 30min, inactivate enzyme (100°C, 5min), centrifuge (4000r / min, 20min), discard the supernatant, add 80ml volume 7% NaOH solution, alkali hydrolyze at 80°C for 60min, wash, naturally Settle, discard the supernatant, filter, dry ...

Embodiment 3

[0072] Using waste cassava residues as raw materials, cassava residue cellulose and heavy metal adsorption materials were prepared according to the following method:

[0073] 1. Extraction of cassava residue cellulose

[0074] Raw material pretreatment: wash cassava dregs with distilled water several times to remove impurities and soluble substances, then put them into a constant temperature drying oven at 70°C for 8 hours, crush them through a 40-mesh sieve, and store them in a desiccator for later use .

[0075] Weigh 10.00g of the pretreated cassava residue, add 60ml of distilled water and boil for 5min to fully gelatinize the starch in the cassava residue, add 100ml of 0.2wt% α-amylase solution, at 55°C, pH5.5 and 90W ultrasonic, Enzyme hydrolyze for 90min, inactivate enzyme (100°C, 5min), centrifuge (4000r / min, 20min), discard supernatant, add 120ml volume 3% NaOH solution, alkali hydrolyze at 75°C for 105min, wash, naturally Settle, discard the supernatant, filter, dry...

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Abstract

The invention discloses a method for extracting cellulose from manioc waste. The method comprises the following steps: washing manioc waste, drying and smashing; adding water to the grinded manioc waste, boiling till the water is in a boiling state, so that starch in the manioc waste becomes pasty, then adding with enzyme, carrying out enzymolysis under ultrasound, deactivating enzyme, centrifuging, and removing the supernate; adding a sodium hydroxide solution into the residue for alkaline hydrolysis, washing, filtering, and drying, and thus obtaining manioc waste cellulose. The invention further discloses a method for preparing a heavy metal adsorption material by adopting the manioc waste cellulose as the raw material, and an adsorption method of heavy metal ions. The manioc waste is taken as a starting material, the cellulose is extracted from the manioc waste through a method combining bio-enzyme and alkaline hydrolysis, the manioc waste cellulose with high content can be rapidly and efficiently obtained, the waste is turned into valuable, the obtained heavy metal adsorption material has great adsorption capacity for the heavy metal ions in water, especially has an excellent adsorption effect for cadmium and lead in the water, and therefore, the manioc waste cellulose has good economy and environment protection value.

Description

technical field [0001] The invention relates to a method for recycling cassava residues, that is, a method for extracting cellulose by using cassava residues as a raw material, and also relates to a method for preparing heavy metal adsorption materials by modifying the extracted cassava residues cellulose. Background technique [0002] Cassava was introduced to China in the 1820s. It was first cultivated in Gaozhou, Guangdong Province, and then introduced to Hainan Island. It is now widely distributed in South China, with Guangxi, Guangdong and Hainan being the most cultivated. The main uses of cassava are food, feed and industrial development and utilization. Cassava is one of the main raw materials for industrial starch production, and a large amount of cassava residues are produced every year. It is estimated that the annual output of cassava residues in my country is about 300,000 tons, and it is increasing by 30% every year. If it cannot be well utilized, it will not ...

Claims

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Application Information

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IPC IPC(8): D21C5/00C08B3/12C08B15/06B01J20/24B01J20/30C02F1/28
CPCB01J20/24C02F1/286C02F2101/20C08B3/12C08B15/06D21C5/005
Inventor 罗盛旭罗璋牛成范春蕾胡珊瑚
Owner HAINAN UNIVERSITY
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