Production process for producing biobase natural gas with coproduction of lignose and microcrystalline cellulose from bamboo processing wastes

A technology of microcrystalline cellulose and production process, which is applied in the directions of lignin derivatives, waste fuels, gas fuels, etc., to achieve great social benefits, realize the utilization of waste resources, and improve the gas production rate.

Active Publication Date: 2009-08-05
ANHUI GEYI CYCLIC ECONOMY IND PARK
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  • Description
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Problems solved by technology

[0008] In order to solve the problem of economical and effective utilization of bamboo processing waste, the present invention provides a production process for

Method used

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  • Production process for producing biobase natural gas with coproduction of lignose and microcrystalline cellulose from bamboo processing wastes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Referring to Figure 1, the production process of using bamboo processing waste to produce bio-based natural gas, lignin and microcrystalline cellulose includes the following steps:

[0042] A. Steam explosion pretreatment

[0043] Take 100kg of bamboo shavings and fill the explosion chamber of the steam explosion machine in stages, pulse steam explosion conditions: hold the pressure for 9 minutes under a pressure of 1.5MPa to obtain steam explosion materials;

[0044] B. Extraction and separation of steam explosives

[0045] According to the weight ratio of steam explosive: water=1:5, water is added to the steam explosive and fully stirred, and the solid phase and liquid phase are obtained through centrifugal or pressing separation;

[0046] C. The liquid phase is produced by anaerobic fermentation to produce biogas:

[0047]Adjust its pH value to 7.0 with lye, pump it into three methanogenic tanks, and then add 20% swamp mud to carry out anaerobic fermentation. Gas ...

Embodiment 2

[0057] Get 100kg of bamboo chips or bamboo sawdust to fill the explosion chamber of the steam explosion machine in stages, and after holding the pressure for 0.5min (30s) under the pressure of 4.0MPa, carry out pulse steam explosion to obtain steam explosion; according to steam explosion: water = With a weight ratio of 1:10, water is added to the vapor to stir thoroughly, and the solid phase and liquid phase are obtained by centrifugation or pressing. The liquid phase is used for anaerobic fermentation to produce biogas with the same embodiment 1. Add 3 times the volume mass fraction of 1% sodium hydroxide solution to the solid phase, cook at a temperature of 100° C. for 3.5 hours to obtain a cooked product; after cooling the cooked product, centrifuge to obtain about 500 kg of black liquor and about 210 kg of bamboo cellulose filter residue. The black liquor is filtered with a tube membrane to remove suspended matter, and then concentrated with a nanomembrane to remove water ...

Embodiment 3

[0059] Technology and method are the same as embodiment 1, what adopt when just separating lignin in " black liquor " is the method for acetic acid neutralization: promptly add 5%-10% acetic acid solution in black liquor and wherein sodium hydroxide, then 5-10% acetic acid solution is used to adjust the pH value of the solution in the range of 1.5-5.5 to precipitate lignin, separate the precipitated lignin, and use the residue for fermentation to produce bio-based natural gas.

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Abstract

The invention relates to a production process for producing biomass based natural gas, lignose and microcrystalline cellulose by utilizing bamboo-curing waste, which solves the problem that the bamboo-curing waste is utilized economically and effectively. The production process comprises the following steps: performing steam exploded pretreatment to the bamboo-curing waste, lixiviating and separating the steam exploded materials by water, producing marsh by the anaerobic fermentation of liquid phase materials, obtaining bamboo cellulose filter residue and black liquid by the alkali treatment of solid phase materials, separating the black liquid from the lignose, and obtaining the microcrystalline cellulose by the acid hydrolysis of the bamboo cellulose filter residue. The production process has high transition heat energy and can realize energy regeneration of the marsh; the joint lignose and microcrystalline cellulose realizes the energy regeneration utilization of the waste. The production process belongs to a closed circulating system which has high economic benefit and environment-protection without pollution.

Description

technical field [0001] The invention relates to a process for producing biomass energy and polymer materials by using biological materials. Background technique [0002] my country has unique bamboo resources, and the area of ​​bamboo forests, the volume of standing bamboo and the annual output of bamboo are all in the forefront of the world. There are about 5 million hectares of bamboo forests in my country 2 , more than 500 kinds. The main production areas of bamboo forests are distributed in Hunan, Fujian, Jiangxi, Zhejiang, Anhui, Guangdong, Guangxi and other provinces. By 2000, the bamboo forest area in my country had reached 5 million ha 2 , with a total storage capacity of 130 million tons. It is planned that by 2010, my country will add 1.2 million hectares of bamboo forests 2 , the bamboo forest area in my country will exceed 6 million hm 2 . [0003] Beginning in the early 1980s, in order to alleviate the contradiction between the tense supply and demand of ...

Claims

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Application Information

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IPC IPC(8): C10L3/06C12P5/02C07G1/00C08B15/08C08H7/00
CPCY02E50/343Y02E50/30
Inventor 管淑清陈存武张莉陈乃富
Owner ANHUI GEYI CYCLIC ECONOMY IND PARK
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