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Method for producing methane from smooth cord-grass and cattle manure

A technology of Spartina alterniflora and biogas production, which is applied in fermentation, biosynthesis, waste fuel, etc., to achieve the effects of strong operability, resource utilization, and improved buffer capacity

Inactive Publication Date: 2009-04-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are domestic reports of aerobic composting of cow dung and crop straw, but there is no report of anaerobic fermentation of straw and livestock manure to produce biogas
In addition, the physical and chemical properties of Spartina alterniflora are still somewhat different from those of common crop straws, and the anaerobic digestion of Spartina alterniflora and cow dung to produce biogas has not been reported at home and abroad.

Method used

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  • Method for producing methane from smooth cord-grass and cattle manure
  • Method for producing methane from smooth cord-grass and cattle manure
  • Method for producing methane from smooth cord-grass and cattle manure

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The anaerobic fermentation of Spartina alterniflora and cow manure produces biogas.

[0026] (1) Grinding pretreatment of the raw material Spartina alterniflora: cut the upper part of the harvested Spartina alterniflora by mechanical or manual methods (because the underground part is time-consuming and laborious to harvest, only the above-ground part can be harvested) into 1~2cm Of

[0027] (2) Adjust the solid content of cow dung to 10% with water and stir it;

[0028] (3) Mix the chopped Spartina alterniflora in step (1) with the cow dung processed in step (2) according to a dry matter mass ratio of 3:1;

[0029] (4) Separate the Spartina alterniflora (containing 42 grams of dry matter) obtained in step (1), the cow dung (containing 14 grams of dry matter) obtained in step (2), and the mixture (containing 56 grams of dry matter) obtained in step (3). Add to the 1000mL anaerobic reactor, add 96.68% water content of anaerobic sludge (one or more of the biogas residue from t...

Embodiment 2

[0034] Spartina alterniflora and cow dung are mixed with different ratios to produce biogas by anaerobic digestion.

[0035] (1) The raw material Spartina alterniflora is crushed and pretreated by mechanically or artificially cutting the upper part of the harvested Spartina alterniflora into small sections of 1 to 2 cm;

[0036] (2) Adjust the solid content of the retrieved cow dung to 10% with water and stir it evenly;

[0037] (3) Combine the chopped Spartina alterniflora in step (1) with the cow dung pretreated in step (2) at a dry matter ratio of 7:1, 3:1, 1:1, 1:3, and 1: 7 Mix well;

[0038] (4) Add the mixture (containing 56 grams of dry matter) obtained in step (3) to a 1000 mL anaerobic reactor, add 371.30 grams of anaerobic sludge with a water content of 96.68% for inoculation and mix;

[0039] (5) Add water to the mixture obtained in step (4) to make the system TS load of the reactor 7%;

[0040] (6) Closed fermentation device, the gas outlet of the fermentation device ...

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Abstract

The invention belongs to the field of development and utilization of renewable energy sources and environmental protection, and discloses a method for producing biogas by utilizing the fermentation of smooth cord-grass and cattle dung. The method comprises the following steps: the smooth cord-grass and the cattle dung are mixed evenly according to the proper proportion and are grafted for anaerobic fermentation, and an inoculum is one or various of biogas residues of old biogas tanks, putrid river mud or anaerobic digestion sludge of city sewage treatment plants; and the temperature of an anaerobic fermentation reaction is controlled to 35+-2 DEG C, fermented objects are stirred during the fermentation process, and the biogas can be produced within 24 hours of the fermentation. The method has the advantages that the method has simple process and strong maneuverability, adopts mixed anaerobic digestion to produce the biogas, not only synchronously treats two kinds of organic solid wastes, but also improves the biological transformation rate of the smooth cord-grass, ensures that the biogas yield of unit smooth cord-grass can improve 31.60 percent at best, and realizes the resourceful, quantitative and innoxious utilization of the smooth cord-grass and the cattle dung.

Description

Technical field [0001] The invention belongs to the field of renewable energy development and utilization and environmental protection, and specifically relates to a method for producing methane by mixing two raw materials of Spartina alterniflora and cow dung with complementary fermentation characteristics through anaerobic fermentation. Background technique [0002] Spartina alterniflora (Spartina alterniflora) is a perennial herb belonging to the genus Spartina of the Gramineae family. It has strong salt tolerance and submergence resistance and is suitable for growth in the intertidal zone from the lower part of the high tide zone to the upper part of the middle tide zone. It is native to the Atlantic coast and is distributed from Newfoundland in Canada to central Florida in the United States to the coast of Mexico. In 1979, Spartina alterniflora was introduced into China to be used as a revetment and beach stabilization along beaches, and it was quickly promoted. According to...

Claims

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Application Information

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IPC IPC(8): C12P5/02
CPCY02E50/343Y02P20/59Y02E50/30
Inventor 郑正陈广银黄星发邹星星杨世关方彩霞张继彪冯景伟赵国华高顺枝伦琳王卫平
Owner NANJING UNIV
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