Method for producing hydrogen and/or methane through fermentation of fiber wastes and device thereof

A waste and methane production technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, biochemical cleaning devices, etc., can solve the problems of low raw material utilization, secondary pollution, and large energy consumption

Inactive Publication Date: 2010-06-30
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a pretreatment process requires high temperature and high pressure conditions, which consumes a lot of energy. At the same time, the use of acid in the pretreatment process puts forward higher requirements on the equipment and may cause secondary pollution; on the other hand, according to theoretical calculations, the fermentation of fiber raw materials The energy recovery rate of hydrogen is only about 30%, and the remaining energy remains in the fermentation broth in the form of volatile acids and small molecule alcohols. The utilization rate of raw materials is low, causing pollution to the environment
The above problems have become an important technical obstacle for the fermentation of hydrogen from fiber raw materials

Method used

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  • Method for producing hydrogen and/or methane through fermentation of fiber wastes and device thereof
  • Method for producing hydrogen and/or methane through fermentation of fiber wastes and device thereof
  • Method for producing hydrogen and/or methane through fermentation of fiber wastes and device thereof

Examples

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Effect test

Embodiment 1

[0067] The present invention proposes a production device for two-stage fermentation of fiber waste to co-produce hydrogen and methane, which is used to produce hydrogen and methane. It includes: a hydrogen production reactor 3, which is a stirred reactor, and it passes through a pipeline and a liquid storage tank 6 It is connected to the hydrogen storage tank 11, and is provided with a hydrogen outlet 1, a hydrogen production feed port 2, a stirring device 4 and a hydrogen production discharge port 5; the methane production reactor 7 is an upflow sludge bed reactor (UASB), and its It is connected with liquid storage tank 6 , biogas slurry storage tank 13 and methane storage tank 12 through pipelines, and is provided with a methanogenic water outlet 10 and a methane outlet 9 .

[0068] The aforementioned two-stage fermentation co-production of hydrogen and methane production device for fiber waste, wherein a fence 14 is set at 10 mm below the fermentation liquid level of the hy...

Embodiment 2

[0084] The device used in this embodiment is the same as in Embodiment 1.

[0085] Corn stalks (taken from the suburbs of Daxing, Beijing), Clostridium thermocellum DSM No.1237 (purchased from the German Culture Collection), Clostridium thermocellum DSM No.4150 (purchased from the German Culture Collection), and thermal fiber Clostridium DSM No.7072 (purchased from the German Culture Collection) and mesogenic methane-producing sludge (prepared with reference to the method described in Example 1) are produced by two-stage fermentation of hydrogen and methane, the steps are as follows:

[0086] (1) Crushing and mixing of raw materials

[0087] Collect fiber waste raw materials, use a plant pulverizer to crush them to a particle size below 20mm, weigh a certain amount of solid raw materials and nutrient salt solution and add them to the hydrogen production reactor, wherein the concentration of solid fiber waste is 10g / L, and the nutrient salt solution Composition is with embodimen...

Embodiment 3

[0098] The device used in this embodiment is the same as in Embodiment 1.

[0099] Use sorghum straw, rice straw, corn straw and wheat straw (the mixing ratio is 4:1:4:1, wherein the sorghum and wheat straw are taken from rural Hebei, the straw is taken from rural Hunan, and the corn straw is taken from the suburb of Daxing, Beijing) , Clostridium thermocellum DSM No.7072 (purchased from German Culture Collection), Clostridium thermocellum DSM No.4150 (purchased from German Culture Collection), Clostridium thermocellum DSM No.572 (purchased from German Culture Collection) Preservation Center) and medium-temperature methanogenic sludge (prepared with reference to the method described in Example 1) to prepare hydrogen and methane by two-stage fermentation, the steps are as follows:

[0100] (1) Crushing and mixing of raw materials

[0101] Collect fiber waste raw materials, use a plant pulverizer to crush them to a particle size below 20mm, weigh a certain amount of solid raw m...

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Abstract

The invention provides a method for producing hydrogen and/or methane through fermentation of fiber wastes and a device thereof. The method comprises the following steps: smashing a straw into a certain grain diameter, placing into a hydrogen production reactor, adding a given amount of water and nutrient solution and then mixing with thermophile bacteria seed liquid together for fermentation to prepare the hydrogen; pumping hydrogen fermentation liquid into a liquid storage tank, continuously pumping into the hydrogen production reactor for fermentation to prepare the methane after pH is adjusted. Because of adopting fiber wastes, raw materials used by the invention have rich resource and low cost, effectively solve the resource problem of biological hydrogen production and overcome the problem that the fiber raw materials of the traditional straw are hard to effectively produce the hydrogen when being not subjected to pretreatment; and the semi-continuous hydrogen production is achieved through the fiber waste dynamic immobilization technology. The invention is easier to popularize and apply by adopting a coupled continuous methane production system and has the advantages of simple and highly-efficient method, energy conservation, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and relates to a method and a device for preparing hydrogen and / or methane by using fiber waste. Background technique [0002] The energy and environmental crisis has made the development of renewable energy a hot spot, and the biogas (hydrogen, methane) regenerated from biomass has become more and more important as an alternative energy source. Biogas is a combustible biogas, which is obtained by decomposing organic substances such as crop straw, tree branches and leaves, human and animal manure, domestic garbage, industrial and agricultural organic waste and wastewater under the action of microorganisms. Its main components are methane and carbon dioxide. , of which methane accounts for about 50%-80%. Biogas can be burned to generate a large amount of heat, thus becoming a natural energy source. The calorific value of methane is 40MJ / M 3 , the calorific value of biogas is 20-32MJ / M ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00C12P5/02C12P39/00C02F11/04C05F5/00C12M1/107C12M1/02C12R1/01
CPCY02E50/343C12M21/04C12M41/26C12M27/02Y02E50/30Y02W30/40
Inventor 刘春朝成喜雨
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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