Dry anaerobic fermentation technology for preparing biogas from blue algae, reed, and paddy rice straw

A rice straw, dry anaerobic technology, applied in fermentation, biochemical equipment and methods, microorganism-based methods, etc., can solve problems such as pollution of the environment, and achieve the effect of good water absorption

Inactive Publication Date: 2014-10-29
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seriously pollute the environment, in addition

Method used

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  • Dry anaerobic fermentation technology for preparing biogas from blue algae, reed, and paddy rice straw
  • Dry anaerobic fermentation technology for preparing biogas from blue algae, reed, and paddy rice straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 15 kg of cyanobacteria with 95% moisture content and 3 kg of chicken manure to mix for wet fermentation, and obtain biogas slurry and biogas residue for use after fermentation.

[0026] Cut the 1 / 4 stem tip part of the front end of the reed, and crush the rice straw and the cut reed stem tip into small pieces with an average length of 1cm. Mix the crushed rice straw and reed according to the mass ratio of 2:1 to obtain the crushed material for use. .

[0027] Take 9kg of the above pulverized material and the biogas residue and biogas slurry obtained after wet fermentation into the mixing device. After stirring and mixing uniformly, the materials will enter the dry anaerobic fermentation device together, and the anaerobic dry fermentation will be carried out for 30 days under the condition of 35℃ in the water bath. , 0.72m gas produced is collected 3 .

Embodiment 2

[0029] Take 15 kg of cyanobacteria with a water content of 90% and 4 kg of duck manure for wet fermentation, and obtain biogas slurry and biogas residue for use after fermentation.

[0030] Cut off 1 / 3 of the tip of the reed, crush the rice straw and the cut of the tip of the reed into small pieces with an average length of 2cm, and mix the crushed rice straw and reed at a mass ratio of 1:1 to obtain a crushed material for use .

[0031] Take 8kg of the above-mentioned crushed material and enter the mixing device together with the biogas residue and liquid obtained after wet fermentation. After stirring and mixing uniformly, the materials will enter the dry anaerobic fermentation device together. The anaerobic dry fermentation will be carried out for 25 days at a constant temperature of 25℃ in a water bath. , 0.68m of gas produced is collected 3 .

Embodiment 3

[0033] Take 15 kg of cyanobacteria with a water content of 90% and mix 5 kg of pig manure for wet fermentation, and obtain biogas slurry and biogas residue for later use.

[0034] Cut off the 1 / 3 stem tip part of the front end of the reed, and crush the rice straw and the cut reed stem tip into small segments with an average length of 4cm, and mix the crushed rice straw and reed according to a mass ratio of 3:1 to obtain a crushed material for use. .

[0035] Take 9kg of the above pulverized material and the biogas residue and liquid obtained after wet fermentation into the mixing device. After stirring and mixing uniformly, the materials will enter the dry anaerobic fermentation device together, and the anaerobic dry fermentation will be carried out for 40 days at a constant temperature of 55℃ in a water bath. , 0.62m gas produced is collected 3 .

[0036] Attached Table 1 Percentage content of biogas detection items produced by each instance

[0037]

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Abstract

The invention relates to a dry anaerobic fermentation technology for preparing biogas from blue algae, reed, and paddy rice straw. The technology comprises the following steps: (1) grinding the raw materials; (2) subjecting the grinded raw materials to wet fermentation; (3) mixing; (4) subjecting the mixture to dry anaerobic fermentation; (5) purifying the biogas. The technology comprises the specific steps as follows: mixing blue algae with a water content of 90 to 95% and livestock and poultry manure according to a mass ratio of 5:(1-2) to carry out wet fermentation; fetching 1/4 to 1/3 of the stem tip in the upper end section of reeds, grinding, then mixing the grinded reed with grinded paddy rice straw according to a mass ratio of 1:(1-3) so as to obtain a mixed material; mixing the biogas slurry after the wet fermentation and biogas residue (blue algae) with the mixed material according to a mass ratio of (2-2.5):1, then carrying out dry anaerobic fermentation for 20 to 40 d at a temperature of 25 to 55 DEG C so as to obtain the biogas which is taken as a novel energy. The whole technology does not generate any secondary pollution, and converts blue algae, reed and paddy rice straw into resources.

Description

Technical field [0001] The invention relates to a process for producing methane by dry anaerobic fermentation, in particular to a process for producing methane by dry anaerobic fermentation of blue algae, reed and rice straw. Background technique [0002] Cyanobateria, together with prokaryotic bacteria, stand alone as the kingdom of prokaryotes. All cyanobacteria contain the blue pigment of a special cyanobacteria (cyanobacteria), which is why the cyanobacteria are named. As the degree of eutrophication in water bodies has increased in recent years, cyanobacteria proliferate in large numbers every summer and form a layer of blue-green and fishy foam on the water surface. Large-scale outbreaks of cyanobacteria can cause the deterioration of water quality, and in severe cases, exhaust oxygen in the water and cause fish death. What's more serious is that some species of cyanobacteria (such as Microcystis) also produce toxins (MC for short). About 50% of cyanobacteria contain a la...

Claims

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Application Information

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IPC IPC(8): C12P5/02C02F11/04C12R1/01
CPCY02E50/30
Inventor 徐炎华何若平胡俊康治金
Owner NANJING UNIV OF TECH
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