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Method for preparing methane by anaerobic fermentation of corn stalks

A corn stalk and anaerobic fermentation technology, which is applied in the direction of fermentation, preparation and application of organic fertilizers, can solve the problems of large influence of fermentation temperature and pH value, low gas production rate of anaerobic digestion, poor fermentation effect, etc., and achieve improvement Utilization rate, excellent fermentation effect, effect of improving efficiency

Pending Publication Date: 2021-02-02
戴加兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of high cellulose and lignin content in corn stalks in the above prior art, anaerobic fermentation is greatly affected by fermentation temperature and pH value, resulting in low anaerobic digestion gas production rate and poor fermentation effect, the purpose of the present invention is to provide a A method for producing methane by anaerobic fermentation of corn stalks, the method comprising: pulverizing recovered corn stalks, and then uniformly mixing the pulverized corn stalks, alkaline substances, water and nitrogen-containing organic matter into a fermenter, Keep warm in a low temperature environment, then add livestock and poultry manure into the fermenter, seal it for anaerobic fermentation

Method used

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  • Method for preparing methane by anaerobic fermentation of corn stalks
  • Method for preparing methane by anaerobic fermentation of corn stalks
  • Method for preparing methane by anaerobic fermentation of corn stalks

Examples

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Embodiment 1

[0024] A method for producing methane by anaerobic fermentation of corn stalks, specifically comprising the following steps:

[0025] Step 1: crush the recovered corn stalks into 3cm segments, add it to the fermenter, then add water, sodium oxide and urea, and mix evenly, wherein the weight ratio of corn stalks, water, sodium oxide and urea is 110: 60:5:6.3, then adjust the temperature of the fermenter to -10°C, adjust the temperature to room temperature every 6 hours, stir, repeat this twice, and then adjust the temperature to room temperature.

[0026] Step 2: Add livestock and poultry manure to the fermenter in step 1 to seal the fermenter, wherein the weight ratio of corn stalks to cow manure is 1:1.29, the fermentation temperature is 35°C, and the fermenter is shaken 3 times every three days , the fermentation period is 60 days.

Embodiment 2

[0028] A method for producing methane by anaerobic fermentation of corn stalks, specifically comprising the following steps:

[0029] Step 1: crush the recovered corn stalks into 7cm segments, add it to the fermenter, then add water, potassium oxide and urea, and mix evenly, wherein the weight ratio of corn stalks, water, potassium oxide and urea is 160: 85:11:10.4, then adjust the temperature of the fermenter to -15°C, adjust the temperature to room temperature every 8 hours, stir, repeat this twice, and then adjust the temperature to room temperature.

[0030] Step 2: Add livestock and poultry manure to the fermenter in step 1, and seal the fermenter, wherein the weight ratio of corn stalks to pig manure is 1.33:1.67, the fermentation temperature is 55°C, and the fermenter is shaken every three days for 3 times, the fermentation cycle is 60 days.

Embodiment 3

[0032] A method for producing methane by anaerobic fermentation of corn stalks, specifically comprising the following steps:

[0033] Step 1: crush the recovered corn stalks into 5cm segments, add it to the fermenter, then add water, calcium oxide and urea, and mix evenly, wherein the weight ratio of corn stalks, water, calcium oxide and urea is 130: 70:8:8.1, then adjust the temperature of the fermenter to -12°C, adjust the temperature to room temperature every 7 hours, stir, repeat this twice, and then adjust the temperature to room temperature.

[0034] Step 2: Add livestock and poultry manure to the fermenter in step 1, and seal the fermenter, wherein the weight ratio of corn stalks and sheep manure is 1.13:1.45, the fermentation temperature is 40°C, and the fermenter is shaken every three days for 3 times, the fermentation cycle is 60 days.

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Abstract

The invention discloses a method for preparing methane by anaerobic fermentation of corn straws. The method comprises the following steps of grinding recycled corn straws into small sections of 3-7 cm, uniformly mixing the ground corn straws, basic oxide, water and nitrogenous fertilizer according to the weight ratio, adding a mixture into a fermentation tank, keeping the temperature in an environment of less than 0 DEG C, heating to room temperature, stirring, adding livestock and poultry manure into the fermentation tank, sealing, and carrying out anaerobic fermentation at 35-55 DEG C for 60days. In the anaerobic fermentation process, the pH value of a fermentation system is kept at 6.5-7.8, the methane gas production rate is less influenced by the pH value and the fermentation temperature, and the methane gas production rate is relatively high.

Description

technical field [0001] The invention belongs to the technical field of crop waste treatment, and in particular relates to a method for producing methane by anaerobic fermentation of corn stalks. Background technique [0002] my country is a large agricultural country with abundant straw resources. In 2017, the cumulative output of straw in my country was 900 million tons, of which corn straw accounted for more than one-third; at the same time, my country's livestock and poultry manure discharge exceeded 2 billion tons , but only a small part of livestock and poultry manure is used as fertilizer, and most of them are not used effectively. This not only causes a waste of resources, but also pollutes the environment due to the random discarding of livestock and poultry manure and the wanton burning of straw. Therefore, It is very important to convert this part of waste into usable clean energy. [0003] In addition, as far as the livestock and poultry manure produced by the bree...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04C05C11/00C05F17/20C05F17/10
CPCC12P5/023C02F11/04C05C11/00C05F17/20C05F17/10C12P2203/00Y02W30/40Y02E50/30
Inventor 戴加兵邵海涛
Owner 戴加兵
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