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Method for producing hydrogen by using excess sludge

A technology for excess sludge and fermentation substrates, applied in the direction of fermentation, etc., can solve the problems of increasing the cost of the hydrogen production process, complicating the separation process, and reducing the hydrogen production rate

Inactive Publication Date: 2015-11-04
UNIVERSTAR SCI & TECH SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of special strains will increase the cost of the hydrogen production process. At the same time, the separation process of special strains is complicated and needs to be purified and identified. Improper treatment will affect the hydrogen production effect and reduce the hydrogen production rate

Method used

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  • Method for producing hydrogen by using excess sludge

Examples

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Effect test

Embodiment 1

[0056] (1) Put 100 mL of excess sludge in a glass beaker, and use an ultrasonic processor to perform low-frequency ultrasonic treatment on the excess sludge in the glass beaker for 12 s at a sound energy density of 100 W / L to obtain hydrogen-producing seed sludge.

[0057] (2) Another 100 mL of excess sludge was placed in a glass beaker, and the excess sludge in the glass beaker was ultrasonically treated for 1 hour under the condition of an acoustic energy density of 1.56 W / mL by an ultrasonic processor to obtain a fermentation substrate.

[0058] The parameters of the hydrogen-producing seed sludge and fermentation substrate are shown in Table 1.

[0059] Table 1 is the parameters of hydrogen-producing seed sludge and fermentation substrate in Example 1 of the present invention

[0060] parameters

Hydrogen-producing mud

Fermentation substrate

SS(g / L)

23.62

20.34

VS (g / L)

12.37

9.83

TCOD(mg / L)

25843.22

23098.71

...

Embodiment 2

[0064] (1) Put 100 mL of excess sludge in a glass beaker, and use an ultrasonic processor to perform low-frequency ultrasonic treatment on the excess sludge in the glass beaker for 12 s at a sound energy density of 100 W / L to obtain hydrogen-producing seed sludge.

[0065] (2) get remaining sludge 100mL and place in the ozone reactor in addition, adopt the ozone generator to the residual sludge in the ozone reactor at 0.139g-O 3 Under the condition of ozone amount of / g-TS, carry out ozone treatment for 1h, obtain fermentation substrate.

[0066] (3) Take 5 mL of the hydrogen-producing seed slurry obtained in the above step (1), inoculate it into an anaerobic bottle filled with 95 mL of the fermentation substrate obtained in the above step (2), blow off nitrogen for 10 minutes, and then place the anaerobic bottle in Oscillate in a constant temperature water bath shaker at 35±1°C, and control the oscillation speed to 135r / min to obtain hydrogen gas.

[0067] The hydrogen produ...

Embodiment 3

[0069] (1) Put 100 mL of excess sludge in a glass beaker, and use an ultrasonic processor to perform low-frequency ultrasonic treatment on the excess sludge in the glass beaker for 12 s at a sound energy density of 100 W / L to obtain hydrogen-producing seed sludge.

[0070] (2) Take another 100mL of excess sludge and place it in an ultrasonic-ozone coupling reaction device. 3 Under the condition of ozone amount of / g-TS, ozone treatment was carried out, and at the same time, the excess sludge in the process of ozone treatment was subjected to ultrasonic treatment under the condition of sound energy density of 1.55W / mL, and the reaction time was 1h to obtain the fermentation substrate.

[0071] (3) Take 5 mL of the hydrogen-producing seed slurry obtained in the above step (1), inoculate it into an anaerobic bottle filled with 95 mL of the fermentation substrate obtained in the above step (2), blow off nitrogen for 10 minutes, and then place the anaerobic bottle in Oscillate in a...

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Abstract

The invention provides a method for producing hydrogen by using excess sludge. The method comprises the following steps: a) subjecting the excess sludge to low-frequency ultrasonic treatment so as to obtain hydrogen-producing seed sludge; b) subjecting the excess sludge to hydrolysis so as to obtain a fermentation substrate; and c) mixing the seed sludge with the fermentation substrate and carrying out fermentation; wherein the sequence of the step a) and the step b) is not limited. Compared with the prior art, the method provided by the invention has the following advantages: a hydrogen production rate is high, and cost for production of hydrogen from excess sludge is substantially reduced since special bacteria is not additionally added as hydrogenogen. Experiment results show that the hydrogen production rate of the method reaches 13.03 mL-H2 / g-TS.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for producing hydrogen by using excess sludge. Background technique [0002] Excess sludge is the product of sewage treatment process. With the popularization of sewage treatment facilities, increase in sewage treatment volume, improvement of treatment standards and expansion of treatment functions, the amount of excess sludge produced and the cost of treatment will increase significantly. [0003] Excess sludge is mainly composed of microorganisms such as bacteria, and contains a large amount of organic matter (including sugar, protein, and fat, etc.), which is an available resource; but it also contains toxic and harmful substances (heavy metals and organic pesticides, etc.), pathogenic bacteria (such as Parasite eggs) and nutrients (nitrogen, phosphorus, potassium, etc.), if discharged directly into the environment without treatment, it will cause second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00
Inventor 杨珊珊郭婉茜孟昭辉任南琪曹玉梅丁健生王荣顾燕
Owner UNIVERSTAR SCI & TECH SHENZHEN
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