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A method for improving the hydrogen production performance of dark fermentation by using manganese-doped magnetic carbon

A technology doped with magnetic carbon and manganese, which is applied in fermentation, chemical instruments and methods, carbon compounds, etc., can solve the problems of inability to realize sludge reduction treatment, complicated production process, and increased sludge volume, and achieve the realization of sludge reduction. Effects of slime reduction treatment, accelerated growth rate, and enhanced enrichment

Active Publication Date: 2021-03-19
QILU UNIV OF TECH
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Problems solved by technology

[0006] Patent application CN104726501A (application number 201510145589.9) uses calcium carbonate as an additive to improve the fermentation effect of bagasse. Although a good gas production effect is achieved, calcium carbonate eventually precipitates in the system, resulting in an increase in the amount of sludge, and sludge reduction cannot be achieved processing
[0007] In summary, the additives for promoting fermentative hydrogen production reported in the above literature have disadvantages such as complex production process, high energy consumption or pollution, which limit their application in the field of large-scale fermentative hydrogen production
The use of manganese-doped magnetic carbon as an accelerator for biohydrogen production to improve hydrogen production performance has not been reported

Method used

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  • A method for improving the hydrogen production performance of dark fermentation by using manganese-doped magnetic carbon
  • A method for improving the hydrogen production performance of dark fermentation by using manganese-doped magnetic carbon

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preparation example Construction

[0045] The preparation method of the manganese-doped magnetic carbon, the specific steps are as follows:

[0046] A. Add 0.75~3.75g MnCl 2 4H 2 O and 2.1~10.2g FeCl 3 ·6H 2 Dissolve O particles in 100-200ml deionized water, add 9-45g activated carbon, stir for 1-2 hours, make it fully mixed, and obtain a mixed solution of iron, manganese and carbon. At this time, MnCl 2 The solution concentration is 3.75~37.5g / L; FeCl 3 The concentration is 10.5-102g / L; the concentration of activated carbon is 45-450g / L; 1.3-6.45g NaOH particles are dissolved in deionized water to obtain a lye with pH=10-12, and the NaOH concentration is 17.3-258g / L;

[0047] B. The above mixed solution is heated and refluxed in an oil bath in a condensing reflux reactor, and the reactor is connected to a condensing reflux pipe. After the solution boils, quickly pour 50ml of 20-129g / L NaOH solution and stir to mix;

[0048] C. The above mixed solution is boiled and refluxed at 100-130°C for 2-4 hours, a...

Embodiment 1

[0058] Manganese-doped magnetic carbon preparation:

[0059] a. 1.5g MnCl 2 4H 2 O and 4.1 g FeCl 3 ·6H 2 O particles were dissolved in 150ml of deionized water, 24g of activated carbon was added, stirred for 1.5h, and fully mixed to obtain a mixture of iron, manganese and carbon. MnCl 2 The solution concentration is 10g / L; FeCl 3 The concentration is 27g / L; the concentration of activated carbon is 160g / L;

[0060] b. The above mixed solution is heated and refluxed in an oil bath in a reactor, and the reactor is connected to a condensation reflux pipe. After the mixed solution boils, quickly pour 50ml of 50g / L NaOH solution into the mixed solution and stir to mix;

[0061] c. The above mixed solution was boiled and refluxed at 105°C for 3 hours, and poured into a beaker to cool after the reaction was complete;

[0062] d. Dry the mixed solution obtained in the above steps at a temperature of 85° C. to obtain manganese-doped magnetic carbon.

[0063] The prepared manga...

Embodiment 2

[0067] Manganese-doped magnetic carbon preparation:

[0068] a. Add 0.75g MnCl 2 4H 2 O and 2.1 g FeCl 3 ·6H 2 O particles were dissolved in 150ml of deionized water, 9g of activated carbon was added, stirred for 1 hour, and fully mixed to obtain a mixed solution of iron, manganese and carbon. MnCl 2 The solution concentration is 5g / L; FeCl 3 The concentration is 14g / L; the concentration of activated carbon is 60g / L;

[0069] b. The above mixed solution is heated and refluxed in an oil bath in a reactor, and the reactor is connected to a condensation reflux pipe. After the mixed solution boils, quickly add 50ml of 20g / L NaOH solution into the mixed solution, and stir to mix;

[0070] c. The above mixed solution is boiled and refluxed at 100°C for 2 hours, and poured into a beaker to cool after the reaction is complete;

[0071] d. Dry the mixed solution obtained in the above steps at a temperature of 75° C. to obtain manganese-doped magnetic carbon.

[0072] The analy...

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Abstract

The patent relates to the fields of composite synthesis and clean energy production, and relates to a method for improving hydrogen production performance of dark fermentation by using manganese-dopedmagnetic carbon. The method includes: adding manganese-doped magnetic carbon into an anaerobic fermentation reactor to increasing hydrogen yield and hydrogen production speed. A fermentation substrate in the anaerobic fermentation reactor is composed of carbon source, nitrogen source, inoculums and the manganese-doped magnetic carbon. In the application, the manganese-doped magnetic carbon is applied to the fermentation hydrogen production process, so that defects, such as low quantity of microorganisms and poor enriching capability, insufficient microelements and low enzyme activity, existing in the fermentation can be overcome. By enriching anaerobic fermentation bacteria, generation of bio-film is promoted and required elements and site for growth and reproduction of the microorganismsare supplied, thus finally increasing the productivity of hydrogen.

Description

technical field [0001] The patent of the present invention relates to the fields of composite material synthesis and clean energy production, and relates to a method for improving the hydrogen production performance of dark fermentation, in particular to a method for improving the hydrogen production performance of dark fermentation by using manganese-doped magnetic carbon. Background technique [0002] Human energy demand is increasing day by day while fossil energy supply is decreasing day by day, food waste, poultry manure, agricultural solid waste and organic waste water and other pollutants have increased in large quantities, resulting in the destruction of the ecological environment and the impact on human health. Biological dark fermentation hydrogen production technology is an environmentally friendly and low-energy-consumption method, which can combine energy regeneration and environmental restoration, by degrading organic pollutants in the environment and converting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/354C12P3/00
Inventor 张记市臧立华范传芳
Owner QILU UNIV OF TECH
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