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A method for anaerobic biogas production using Jerusalem artichoke straw as raw material

A technology of Jerusalem artichoke straw and biogas production, which is applied in the field of anaerobic production of biogas and anaerobic biogas production with Jerusalem artichoke straw as raw material, can solve the problem that lignin is difficult to convert efficiently, the straw has not been effectively utilized, and the chemical composition and fiber morphology are different. It can achieve the effect of efficient and stable biogas production, improving biogas production capacity, and effectively utilizing waste.

Active Publication Date: 2017-10-31
CSIC SHANGHAI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stalks of Jerusalem artichoke have a compact structure, and the chemical composition and fiber morphology of each part vary greatly. The cellulose and lignin in it are difficult to be efficiently transformed by conventional methods, so the stalks of Jerusalem artichoke have not been effectively used.

Method used

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  • A method for anaerobic biogas production using Jerusalem artichoke straw as raw material
  • A method for anaerobic biogas production using Jerusalem artichoke straw as raw material
  • A method for anaerobic biogas production using Jerusalem artichoke straw as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The TS% of the raw material Jerusalem artichoke straw was determined by the oxidative degradation method to be 90.33%, the ash content was 3.6%, the cellulose was 45.6%, the hemicellulose was 16.5%, and the lignin was 24.8%; The amount of decomposing bacteria is 0.2% of the solid-liquid weight, mix well, adjust the water content to 65%, and ferment at constant temperature for 48 hours. Saccharomyces cerevisiae 5%, Aspergillus niger 30%;

[0034] The TS% of fresh cow manure and sheep manure was determined to be 20.56%; take 386g of processed raw materials, add 193g of fresh cow manure and sheep manure and mix well;

[0035] Take the obtained mixture and put it into a 10L anaerobic fermentation device, add 650mL of TS%=10% anaerobic activated sludge, and use biogas slurry to make the volume to 6.5L;

[0036] Medium temperature anaerobic fermentation at 33°C, stirring twice a day, rotating speed 110rpm, 10min / time;

[0037] Anaerobic digestion is defined as the end of an...

Embodiment 2

[0040] The TS% of the raw material Jerusalem artichoke straw was determined by the oxidative degradation method to be 92.33%, the ash content was 4.3%, the cellulose was 47.6%, the hemicellulose was 13.5%, and the lignin was 25.8%; The amount of decomposing bacteria is 0.3% of the solid-liquid weight, mix well, adjust the water content to 70%, and ferment at constant temperature for 60 hours. Yeast 15%, Aspergillus niger 25%;

[0041] Determination of fresh cow dung TS% is 22.61%; take 354g of raw material after treatment, add 212g of fresh cow dung and mix;

[0042] Take the obtained mixture and put it into a 10L anaerobic fermentation device, add 975mL of TS%=15% anaerobic activated sludge, and use biogas slurry to make the volume to 6.5L;

[0043] Anaerobic fermentation at medium temperature at 35°C, stirring 3 times a day, rotating speed 120rpm, 15min / time;

[0044] Anaerobic digestion is defined as the end of anaerobic digestion when the daily gas production is lower th...

Embodiment 3

[0046] The TS% of the raw material Jerusalem artichoke straw was determined by the oxidative degradation method to be 91.43%, the ash content was 2.97%, the cellulose was 45.36%, the hemicellulose was 12.5%, and the lignin was 24.8%; The amount of decomposing bacteria is 0.5% of the solid-liquid weight, mix well, adjust the water content to 70%, and ferment at constant temperature for 72 hours. 5%, Saccharomyces cerevisiae 10%, Aspergillus niger 35%;

[0047] The TS% of fresh cow manure and pig manure was determined to be 25.61%; take 375g of processed raw materials, add 141g of fresh cow manure and pig manure and mix well;

[0048] Take the obtained mixture and put it into a 10L anaerobic fermentation device, add 833mL of TS%=12.5% ​​anaerobic activated sludge, and use biogas slurry to make the volume to 6.8L;

[0049] Anaerobic fermentation at medium temperature at 35°C, stirring 4 times a day, rotating speed 130rpm, 15min / time;

[0050] Anaerobic digestion is defined as t...

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Abstract

The invention discloses a method for anaerobically producing biogas with jerusalem artichoke straws as a raw material and belongs to the field of production of biogas. The method particularly includes following steps: (1) crudely crushing jerusalem artichoke straws into 0.8-1.5 cm, adding biogas slurry for adjusting a water content to be 65%-75%, adding thoroughly decomposed strain for performing a fermentation for 48-72h, or performing constant-temperature pyrolysis without addition of the thoroughly decomposed strain for 48-72h at 60-70 DEG C; (2) adding fresh livestock manure to the fermented jerusalem artichoke straws with a ratio of the fermented jerusalem artichoke straws to the livestock manure being 5-8:3; (3) feeding the mixed material into an anaerobic fermentation device and adding an inoculation with mixing uniformly; and (4) performing anaerobic fermentation. The method is advantaged in that the jerusalem artichoke straws are subjected to effective pre treatment for destroying a physical structure and a chemical structure of the jerusalem artichoke straws. Macro-molecular cellulose and lignin are degraded incompletely and carbon source can be obtained maximumly. Biogas producing capability of anaerobic microorganisms can be further improved and production of the biogas is high-efficient and stable.

Description

technical field [0001] The invention relates to a method for anaerobically producing biogas, which belongs to the field of biogas production, in particular to a method for anaerobically producing biogas by using Jerusalem artichoke stalks as raw materials. Background technique [0002] Jerusalem artichoke is a perennial herbaceous plant of the genus Sunflower in the Compositae family, also known as Jerusalem artichoke, devil ginger, and five-star grass. It has strong growth, tall plants, and has multiple advantages such as cold resistance, drought tolerance, and easy planting. Jerusalem artichoke tubers contain a large amount of sugars, the total content can reach 80-95%. They are converted into monosaccharides through biological enzymatic hydrolysis or acid hydrolysis, and then converted into bioethanol by microorganisms. Therefore, Jerusalem artichoke tubers are both edible and It can be made into starch, inulin, food additives, health products, etc. through deep processi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C02F11/04
CPCY02E50/30
Inventor 黄俊万雪梅
Owner CSIC SHANGHAI NEW ENERGY
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