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Agricultural waste anaerobic-aerobic balanced fermentation method

A technology of agricultural waste and fermentation method, which is applied in the field of rural energy and environmental protection, can solve the problems of poor efficiency of biogas fertilizer, low nutrient content of biogas fertilizer, long anaerobic fermentation cycle, etc., achieve efficient reuse, prolong resource utilization, Effect of reducing energy loss

Active Publication Date: 2018-05-08
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of agricultural waste anaerobic-aerobic balanced fermentation method, this fermentation method solves the defects of existing anaerobic fermentation cycle long, biogas manure nutrient content is low, biogas fertilizer efficiency is poor, through anaerobic-aerobic Aerobic balanced fermentation produces clean biogas energy and high-quality organic fertilizer

Method used

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  • Agricultural waste anaerobic-aerobic balanced fermentation method

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Effect test

Embodiment 1

[0042] Embodiment 1: Fermentation is carried out with the cow feces of a cow farm as the research object

[0043] (1) Collect about 20 kg of agricultural waste of this type (mainly feces and litter excreted during cow feeding, but not limited to this), discard impurities such as hair and stones, and add wheat straw to adjust the C / N to 25:1, add anaerobic fermentation tank bottom sludge as an inoculum, the inoculum amount is 30%, adjust the pH value to 7.47, and TS to 10%.

[0044] (2) Put the material into a 50L sequencing batch anaerobic fermentation reactor, after 11 days, the anaerobic fermentation at 38°C reached the peak gas production stage, and collected biogas as domestic gas. The average volumetric gas production rate during the fermentation process was 1.63 m 3 m -3 d -1; The material is separated by a solid-liquid separator to obtain biogas residue and biogas slurry. Among them, the C / N of biogas residue is 19.07, the mass moisture content is 57.18%, and the CO...

Embodiment 2

[0048] Embodiment 2: Taking corn as research object to carry out fermentation

[0049] (1) Collect about 500 kg of agricultural wastes of this type (mainly discarded tail leaves from the growth process of corn and residual straw after harvesting corn), discard impurities such as hair and stones, and add chicken manure to adjust the C / N to 25 : 1, add anaerobic fermentation tank bottom sludge as inoculum, the inoculum size is 40%, the pH value is 7.81, and the TS is 25%.

[0050] (2) Put the material into 1m 3 In the volumetric sequencing batch anaerobic fermentation reactor, after 14d38℃ mesophilic anaerobic fermentation to reach the peak gas production stage, biogas is collected as domestic gas, and the average volumetric gas production rate during the fermentation process is 2.07m 3 m -3 d -1 ; The material is separated by a solid-liquid separator to obtain biogas residue and biogas slurry. Among them, the C / N of biogas residue is 21.7, the mass moisture content is 50.7%...

Embodiment 3

[0054] Embodiment 3: Fermentation is carried out with rural tail vegetables as research object

[0055] (1) Collect about 1 ton of agricultural wastes of this type (mainly the low economic value remaining after the harvest of farmland vegetables, but not limited to this), crush them to a length of 1-3 cm, and add the bottom sludge of the anaerobic fermentation tank as For the inoculum, the inoculation amount is 30%, the C / N value of the adjusted material is 25:1, the pH value is 7.1, and the TS is 10%.

[0056] (2) Put the material into 5m at one time 3 In a biogas digester with a large volume, after 12d38℃ medium temperature anaerobic fermentation to reach the peak stage of gas production, the biogas is collected as domestic gas, and the average volumetric gas production rate during the fermentation process is 1.53m 3 m -3 d -1 ; The material is separated by a solid-liquid separator to obtain biogas residue and biogas slurry. Among them, the C / N of biogas residue is 17.83...

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Abstract

The invention discloses an agricultural waste anaerobic-aerobic balanced fermentation method. The fermentation method comprises the following steps of 1, adding an inoculum into smashed agricultural waste to be subjected to anaerobic fermentation; 2, regarding methane generated through anaerobic fermentation as domestic gas, and separating materials to obtain biogas residue; 3, adding adjuvant materials into the biogas residue to be subjected to aerobic fermentation to obtain biological humic acid fertilizer. By means of the produced biological humic acid fertilizer, through anaerobic fermentation and high-temperature composting, harmless treatment is fully achieved, spreading of diseases and insect pests is effectively controlled, and the occurrence probability of the diseases and insectpests in the subsequent growth process of plants applied with organic fertilizer is also lowered. The agricultural waste is efficiently reutilized to produce organic fertilizer, the industry chain ofthe agricultural waste is expanded, the resource utilizing link is prolonged, and the method powerfully drives the agricultural recycling economy.

Description

technical field [0001] The invention relates to an anaerobic-aerobic balanced fermentation method, in particular to an anaerobic-aerobic balanced fermentation method for agricultural waste, belonging to the technical field of rural energy and environmental protection. Background technique [0002] With the major changes in agricultural production methods and rural energy consumption methods, the demand for rural biogas energy has weakened, and the demand for organic fertilizers has increased. In one cycle (about 30 days) of sequential batch anaerobic fermentation, the daily gas production can reach the highest value on the 6th to 15th day, and the cumulative gas production can reach 60% to 85% of the whole cycle on the 14th to 16th day. After that, the gas production is close to At the lowest value, a large amount of nutrients flowed into the biogas slurry, prolonging the anaerobic fermentation cycle. Usually, the organic matter content of biogas residue is 9.05%-42.9%, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05F17/00C12M1/107C05G3/80
CPCC05F3/00C12M1/107C05F17/50C05G3/80C05F5/002C05F11/00C05F11/02Y02W30/40
Inventor 孟海波赵立欣沈玉君丁京涛刘烨王健程红胜周海宾张曦
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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