Method for treating organic solid waste and bio-organic fertilizer prepared by using method

A technology for organic solids and wastes, applied in the field of bio-organic fertilizers, can solve problems such as failure to function, limited degradation efficiency, and degradation efficiency of organic matter in the early stage of incomplete decomposition, so as to reduce energy consumption for heating up, and the method is efficient throughout the process and avoids mutual effect of influence

Inactive Publication Date: 2019-12-10
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, it also has obvious defects. For example, extreme thermophiles compete with native microorganisms at a disadvantage, and they can only be activated at a certain temperature (above 65°C). Therefore, in the early stage of fermentation (temperature accumulation stage), macromolecular organic matter is degraded does not work during
We all know that there is a strong correlation between the degradation of organic matter in materials and the humification of materials. Although extreme thermophiles can make materials more humic, they are still limited by the degradation efficiency of macromolecular organic matter in the early stage.
[0004] In order to solve the existing problems of traditional high-temperature composting such as incomplete decomposition and the degradation efficiency of organic matter in the early stage of ultra-high temperature fermentation

Method used

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  • Method for treating organic solid waste and bio-organic fertilizer prepared by using method
  • Method for treating organic solid waste and bio-organic fertilizer prepared by using method
  • Method for treating organic solid waste and bio-organic fertilizer prepared by using method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment is a method for treating organic solid waste, the process flow is as follows figure 1 As shown, Bacillus subtilis, white rot fungi, and Aspergillus niger mixed strains were used for primary high-temperature fermentation, and the extreme thermophile Thermus thermophilus was used as the inoculum for the secondary ultra-high temperature fermentation.

[0040] Specific steps are as follows:

[0041] (1) Material pretreatment:

[0042] The dry sludge (moisture content 49.7%) wet material and crushed wheat straw (30 mesh) auxiliary materials were mixed according to the weight ratio of 20:4, and the final water content of the mixed material was adjusted to 55%.

[0043] (2) High temperature aerobic fermentation (first fermentation):

[0044] The mixed material obtained in step (1) is inoculated with high-temperature degradation bacteria (Bacillus subtilis: white rot fungus: Aspergillus niger = 1:1:1, effective bacteria ratio) according to 0.5% of the weight o...

Embodiment 2

[0055] The bio-organic fertilizer prepared in Example 1 was used as a base fertilizer, mixed with soil and applied to potted planting of begonia seedlings in four seasons, and its growth-promoting effect was compared with a commercial fertilizer as a control.

[0056] See Table 2 for the application effect of the bio-organic fertilizer prepared in Example 1 on begonia seedlings in four seasons.

[0057] The growth-promoting effect of bio-organic fertilizer in the embodiment 1 of table 2 to begonia seedlings in four seasons

[0058]

[0059] Note: The values ​​in the table are the average of 3 repeated experiments.

[0060] As can be seen from Table 2, compared with commercially available commercial fertilizers, adopt the bio-organic fertilizer in the present embodiment, the root length of plant, stem length, plant fresh weight, plant dry weight all have obvious improvement, show that this Bio-organic fertilizers have better fertilizer efficiency and are conducive to the gr...

Embodiment 3

[0063] This embodiment is a method for treating organic solid waste, the process flow is as follows figure 1 As shown, the mixed strains of Bacillus subtilis, white rot fungus and Aspergillus niger were used for the first high-temperature fermentation, and the extreme thermophile Calditerricolayamamurae was used as the inoculum for the second ultra-high temperature fermentation.

[0064] Specific steps are as follows:

[0065] (1) Material pretreatment:

[0066] Mix the dried sludge wet material with the crushed wheat straw (30 mesh) auxiliary material at a weight ratio of 20:2, and adjust the final water content of the mixed material to 45%.

[0067] (2) High temperature aerobic fermentation (first fermentation):

[0068] The mixed material obtained in step (1) is inoculated with high-temperature degradation bacteria (Bacillus subtilis: white rot fungus: Aspergillus niger = 1:1:1, effective bacteria ratio) according to 0.3% of the weight of the mixed material after adjustin...

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Abstract

The invention relates to a method for treating organic solid waste and bio-organic fertilizer prepared by using the method. The method comprises the steps: (1) mixing the wet material of the organic solid waste with crushed auxiliary materials so as to obtain a mixture with a water content of 45-55%; (2) inoculating high-temperature degrading bacteria to the mixture obtained in the step (1), performing ventilation on the mixture so as to ensure a fully aerobic environment of the mixture, performing intermittent turning-mixing treatment, and maintaining the temperature of the mixture at 65-75 DEG C for high-temperature fermentation for 2-6 days so as to obtain an intermediate material; and (3) inoculating extreme thermophiles to the intermediate material obtained in the step (2), performingeven turning, performing ventilation on the intermediate material so as to ensure a fully aerobic environment of the material, maintaining the highest temperature of the intermediate material at 85-90 DEG C continuously for 2-6 days, and performing static fermentation on the material for 18-21 days. Compared with the prior art, the method has the advantages of high feasibility, simple operation,a short production cycle, high output and stable product quality, and a win-win situation of environmental protection and economic benefits is achieved.

Description

technical field [0001] The invention belongs to the technical field of organic solid waste treatment and resource utilization, and in particular relates to a method for treating organic solid waste and the prepared bio-organic fertilizer. Background technique [0002] There are more than 10 billion tons of solid organic waste in my country every year. If the rich organic matter and plant nutrients can be converted into organic fertilizers, the potential for improving the recycling rate of resources will be huge. Traditional aerobic fermentation is the process of converting organic matter in organic materials into more stable humus, and the products are organic fertilizers and soil conditioners. The traditional process is simple to operate and requires less investment, but it has many problems, such as a large area, a long production cycle (about 1-2 months or even longer), high labor costs, greatly affected by geographical and climatic conditions, and prone to secondary prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05F17/00B01F23/80
CPCC05F7/00C05F17/00Y02W30/40
Inventor 董滨李昕沈丹妮戴晓虎
Owner TONGJI UNIV
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