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Method of preparing marsh gas from spartina alterniflora

A technology of Spartina alterniflora and fermentation method, which is applied in the field of resources and environment, and can solve problems such as pollution, large manpower and material resources, and low efficiency

Inactive Publication Date: 2007-03-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current measures to control Spartina alterniflora are: (1) physical methods, mainly manual and mechanical removal, which consume a lot of manpower and material resources and are inefficient; (2) chemical methods, using herbicides, but herbicides can only remove the ground surface usually. The above parts are less effective for seeds and roots in tidal flat soil, and there are pollution problems; (3) Biological methods, using animal natural enemies and biological control of pathogenic microorganisms are still in the experimental stage, as the natural enemies and pathogenic microorganisms of alien invasive species Microorganisms are also alien species, and there is a great ecological risk
There are many disadvantages and deficiencies in these measures, and they cannot fundamentally control Spartina alterniflora
In the face of such a huge biomass of Spartina alterniflora, it has not been reported at home and abroad to use it as an energy resource for biogas fermentation

Method used

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  • Method of preparing marsh gas from spartina alterniflora
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  • Method of preparing marsh gas from spartina alterniflora

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A farmer uses Spartina alterniflora to prepare biogas.

[0029] (1) Pretreatment of the raw material Spartina alterniflora; cutting the harvested aboveground part of Spartina alterniflora into small sections of 2-3 cm by manual or mechanical means;

[0030] (2) Add 5 kg of N-containing material urea to the Spartina alterniflora 250 kg obtained in step (1), mix, adjust the carbon-nitrogen ratio of the mixture, and make the C / N in the mixture be 20: 1;

[0031] (3) Put the mixed material obtained in the step (2) into a common biogas fermentation device of 4 cubic meters, and add 500 kg of anaerobic digested sludge with an inoculum water content of 80%, to obtain fermentation raw materials;

[0032] (4) add water to the fermented raw material in step (3), until the water surface is higher than fermented raw material 5cm;

[0033] (5) Close the fermentation device, the gas outlet of the fermentation device is connected to the gas storage device through the gas pipeline, an...

Embodiment 2

[0036] A small business produces biogas from Spartina alterniflora.

[0037](1) Pretreatment of the raw material Spartina alterniflora; cutting the harvested aboveground part of Spartina alterniflora into small sections of 2-3 cm by manual or mechanical means;

[0038] (2) Add 30 kg of ammonium bicarbonate containing N element material in the Spartina alterniflora 1250kg of step (1) gained, mix, adjust the carbon-nitrogen ratio of mixture; Make the C / N of mixture be 30: 1;

[0039] (3) putting the mixture obtained in step (2) into a single-phase internal circulation fermentation device with a volume of 20 cubic meters, and adding 5 cubic meters of inoculum biogas slurry for inoculation to obtain fermentation raw materials;

[0040] (4) adding water to the fermentation raw material in step (3), until the water surface is higher than the fermentation raw material 20cm;

[0041] (5) Close the fermentation device, the gas outlet of the fermentation device is connected to the gas ...

Embodiment 3

[0044] A medium-sized enterprise uses Spartina alterniflora to produce biogas.

[0045] (1) Pretreatment of the raw material Spartina alterniflora: cutting the harvested aboveground part of Spartina alterniflora into small sections of 2-3 cm by manual or mechanical means;

[0046] (2) Solid raw material management fermentation device: Add 6250 kg of pretreated Spartina alterniflora raw material to a 100 cubic meter solid raw material management fermentation device, add 125 kg of urea to make the carbon-nitrogen ratio in the mixture reach 25:1;

[0047] (3) Liquid microbial management reaction device: put polyethylene spherical packing with a volume of 5 cubic meters into a liquid microbial management reaction device with a volume of 20 cubic meters, add 2500 kg of anaerobic digested sludge with an inoculum water content of 80%, and add A certain amount of water, leaving a 20cm space on the upper part of the reactor;

[0048] (4) Close the fermentation device, the gas outlet o...

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Abstract

The invention discloses a preparing method of marsh gas based on high-effective anaerobic ferment of interflower-rice-straw in the resource and environmental technological domain, which comprises the following steps: predisposing interflower-rice-straw; adding N element material in the interflower-rice-straw; adjusting the ratio of carbon and nitrogen at 20:1-30:1; putting in the ferment device; seeding; fermenting; finishing one ferment period through 20-60d. The ferment method contains single-phase non-revolving ferment method, single-phase inner-revolving ferment method and solid-liquid ferment method.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and in particular relates to a method for preparing biogas by fermenting Spartina alterniflora as a raw material. Background technique [0002] Spartina aterniflora, native to the United States, is a perennial salt marsh plant that grows in the intertidal zone. The plant of Spartina alterniflora is strong and tall, and its root system is extremely developed. The ground height can generally reach 1.0-2.0m, and the root system can reach about 1.5m deep into the soil. The effect of greening the beach. At that time, my country's coastal areas were often hit by natural disasters such as storm surges and typhoons, and the economy, people's lives and property in coastal areas were greatly endangered. At the beginning of 1980, Spartina alterniflora was introduced into coastal tidal flats in my country, and made great contributions in many aspects such as protecting beaches, promoting ...

Claims

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Application Information

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IPC IPC(8): C02F11/04C05F17/00
CPCY02E50/343Y02E50/30Y02W30/40
Inventor 朱洪光陈小华王彪朱鹏
Owner TONGJI UNIV
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