Pretreatment method for biomass waste

A biomass waste and pretreatment technology, applied in the field of industrial biology, can solve the problems of restricting large-scale comprehensive refining of biomass waste, low carbohydrate recovery rate, and high equipment requirements, and achieve mild conditions, environmental friendliness, and improved efficiency effect

Inactive Publication Date: 2016-04-20
TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to remove lignin, the current pretreatment method for cassava distiller's grains continues to use the traditional acid-base pretreatment method. The traditional pretreatment method generally has many disadvantages such as too strong reaction, low recovery rate of carbohydrates, many by-products, high energy consumption, and high equipment requirements. , thus restricting the large-scale comprehensive refining of biomass waste represented by cassava distillers grains

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A pretreatment method for biomass waste, comprising the following steps:

[0024] Step 1, drying and pulverizing the biomass waste, passing through a 40-100 mesh standard sieve;

[0025] Step 2, adding water, ferrous ions and hydrogen peroxide solution to the pulverized biomass waste in sequence, stirring evenly, and treating for 60 minutes to obtain a pretreatment liquid of biomass waste;

[0026] Wherein, the amount of the ferrous ion that needs to be added per 1g of the biomass waste is 2.63-52.6mM, and the amount of the hydrogen peroxide that needs to be added per 1g of the biomass waste is 3.5-7.1mM.

Embodiment 2

[0028] A pretreatment method for biomass waste, comprising the following steps:

[0029] Step 1, drying and pulverizing the biomass waste, passing through a 40-100 mesh standard sieve;

[0030] Step 2, adding water, ferrous ions and hydrogen peroxide solution sequentially to the pulverized biomass waste, and stirring evenly;

[0031] Wherein, the amount of the ferrous ion that needs to be added per 1g of the biomass waste is 2.63mM, and the amount of the hydrogen peroxide that needs to be added per 1g of the biomass waste is 3.5mM ;

[0032] Step 3: Mix the pulverized biomass waste, water, ferrous ions and hydrogen peroxide solution, and then heat treatment. The temperature of the heat treatment is 80° C., and the heating time is 5 minutes to obtain a pretreatment liquid.

[0033] Wherein, the divalent iron ion is derived from the hydrolysis of a ferric salt in ferrous sulfate or ferrous chloride.

Embodiment 3

[0035] A pretreatment method for biomass waste, comprising the following steps:

[0036] Step 1, drying and pulverizing the biomass waste, passing through a 40-100 mesh standard sieve;

[0037] Step 2, adding water, ferrous ions and hydrogen peroxide solution sequentially to the pulverized biomass waste, and stirring evenly;

[0038] Wherein, the amount of the ferrous ion that needs to be added per 1g of the biomass waste is 11.9mM, and the amount of the hydrogen peroxide that needs to be added per 1g of the biomass waste is 5.3mM ;

[0039] Step 3: Mix the pulverized biomass waste, water, ferrous ions and hydrogen peroxide solution, and then heat treatment. The temperature of the heat treatment is 95° C., and the heating time is 20 minutes to obtain a pretreatment liquid.

[0040] Wherein, the divalent iron ion is derived from the hydrolysis of a ferric salt in ferrous sulfate or ferrous chloride.

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Abstract

The invention especially relates to a pretreatment method for biomass waste, which belongs to the field of industrial biotechnology. According to the method, water, divalent iron ions and a hydrogen dioxide solution are successively added into crushed biomass waste, the above-mentioned materials are uniformly mixed under stirring, and treatment is carried out for at least 5 min, so a pretreatment fluid of the biomass waste is obtained; the molar weight of the divalent iron ions to be added into each g of the biomass waste is 2.63 to 52.6 mM; and the molar weight of hydrogen peroxide to be added into each g of the biomass waste is 3.5 to 7.1 mM. The pretreatment method for the biomass waste is simple in process, mild in conditions, friendly to the environment and energy-saving; and the pretreatment method is a novel pretreatment mode corresponding to a biomass waste structure with cassava vinasse as a representative and provides a novel approach for low-cost and high-efficiency conversion of biomass waste with cassava vinasse as a representative.

Description

technical field [0001] The invention relates to the field of industrial biotechnology, in particular to a pretreatment method for biomass waste. Background technique [0002] Cassava has the advantages of wide distribution, relatively cheap, high output value, and high starch content, and is used in the production of bioethanol. Cassava distillers grains are solid wastes produced during the production of ethanol from cassava. Some enterprises use cassava distiller's grains as livestock feed, fuel for boilers, and some enterprises directly treat cassava distiller's grains as discarded garbage. Every year, more than 3.6 million tons of distillers grains are produced from cassava fuel ethanol production in China. Such a large amount of solid residue will cause serious environmental pollution. The main component of cassava distillers grains is lignocellulose, the cellulose content is about 20%, and the lignin content can be as high as 24%. The existence of a large amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02
Inventor 高乐李晨张东远陈树林
Owner TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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