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Complex microbial agent and application thereof in aerobic repair of landfill

A compound microbial inoculant and landfill technology, which is applied in the direction of microorganism-based methods, microorganisms, and solid waste removal, etc. To achieve the effect of strengthening the aerobic repair effect, reducing the treatment cost and improving the degradation efficiency

Active Publication Date: 2018-09-07
BEIJING GEOENVIRON ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dominant high-temperature microbial community formed in the previous stage has a weak ability to decompose such organic matter, and its functionality is not strong, leading to a gradual decline in the aerobic stabilization efficiency of garbage; The ratio is unbalanced, especially the content of humic acid COD and nitrate is high, and it is difficult to further stabilize it only by physical adsorption of landfill and biological metabolism of indigenous microorganisms
Therefore, the single type of indigenous microorganisms in the waste dump during the aerobic treatment process of the landfill and the lack of specific functions are the main reasons for the instability of the aerobic treatment effect of the entire landfill and the prolongation of the treatment period, thereby increasing the operation and management costs of the process

Method used

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  • Complex microbial agent and application thereof in aerobic repair of landfill
  • Complex microbial agent and application thereof in aerobic repair of landfill
  • Complex microbial agent and application thereof in aerobic repair of landfill

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The two synergistically used composite microbial agents provided by the embodiments of the present invention and their application in aerobic remediation of landfills, such as figure 1 As shown, follow the steps below:

[0059] 1. Preparation of type I and type II composite microbial inoculum fermentation broth:

[0060] In a container, add clean water and the original leachate of the landfill according to the volume ratio of 3:7, and add the type I compound microbial agent with a mass ratio of 8% and the compound with a mass ratio of 0.15% based on the total amount of water. Vitamins, starch and nitrogen-phosphorus compound fertilizer are added at the same time to adjust the C:N:P mass ratio of the mixture to be 100-200:5:1.

[0061] The above-mentioned type I microbial compound inoculum is made up of Streptomyces brucei, Lactobacillus crispatus, Bacillus megaterium, Bacillus subtilis, Bacillus licheniformis and active dry yeast in a mass ratio of 2:1:2:2:2:1. , The ratio of...

Embodiment 2

[0083] The composite microbial agent provided by the embodiment of the present invention and its application in aerobic remediation of landfills are carried out according to the following steps:

[0084] 1. Preparation of type Ⅱ microbial compound fermentation broth:

[0085] The configuration method is the same as in Example 1.

[0086] 2. Landfill:

[0087] The simulated landfill bioreactor used in this example is the same as that in Example 1. The landfill waste used comes from a landfill in Beijing, and the landfill age is 5 years. The specific physical composition is shown in Table 1. Due to the long time of anaerobic landfilling, the surface of the garbage forms a mixture similar to black humus. Except for some plastics and stones, it is difficult to sort and separate, so the main physical components are counted as others.

[0088] 3. Dosing of type Ⅱ microbial compound fermentation broth:

[0089] Since this example uses garbage with a 5-year landfill age, according to the conte...

Embodiment 3

[0092] Compared with Example 1, only the mixing ratio and dosing method of the bacteria in the type I microbial complex inoculum and the type II microbial complex inoculum were changed. Specifically: the type I microbial complex inoculum was composed of Streptomyces chestnut and curly milk Bacillus, Bacillus megaterium, Bacillus subtilis, Bacillus licheniformis and active dry yeast are proportioned according to the mass ratio of 1:2:1:2:1:2, and the ratio of each component to the total mass is still 10%-20 % Within the range; the bacterial agent was cultured and dosed in 5 times within 30 days after the start of aerobic ventilation, and the total dose was 10 ppm (based on the total amount of reperfusion leachate).

[0093] The type Ⅱ microbial compound agent is Phanerochaete chrysosporium, Bacillus cereus, Paracoccus denitrificans, Candida utilis and Rhodococcus erythropolis according to the mass ratio of 2:1:1:3:3. , The ratio of each component to the total mass is still in the ...

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Abstract

The invention relates to the field of garbage disposal, in particular to a complex microbial agent and an application thereof in aerobic repair of landfill. The complex microbial agent contains an type-I complex microbial agent and / or a type-II complex microbial agent, wherein the type-I complex microbial agent is prepared from streptomyces badius, lactobacillus crispatus, bacillus megatherium, bacillus subtilis, bacillus licheniformis and active dry yeast; the type-II complex microbial agent is prepared from phanerochaete chrysosporium, bacillus cereus, paracoccus denitrificans, candida utilis and rhodococcus erythropolis. The complex microbial agent is an efficient microbial agent prepared by massive screening and compounding according to specificity of nature change of garbage components, environmental factors and pollutants in the aerobic repair process of the landfill. The two types of microbial agents are added selectively in the aerobic repair process of the landfill by stages,and by means of function specificity of the microbial agents, the aerobic repair operating effect of the landfill is enhanced, the treatment cycle is shortened, and the operating cost is reduced.

Description

Technical field [0001] The present invention relates to the field of waste treatment, in particular to a composite microbial agent and its application in aerobic remediation of landfills. Background technique [0002] Since the 1990s, landfill has been the main technical means for domestic waste disposal in my country. It is reported that the average design life of domestic waste landfills in my country is 15 years, and currently about 67% of landfills have been closed or are close to closure. For a long time, the collection and transportation of domestic waste in my country has been mainly based on mixed collection and transportation, which has caused a large amount of waste with high organic content (50% to 70%) to enter the landfill. Most landfills in my country (such as sanitary and simple landfill) use anaerobic landfill methods. However, due to the slow natural degradation of waste in an anaerobic environment and a long period of organic matter stabilization (30-50 years)...

Claims

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Application Information

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IPC IPC(8): C12N1/20C12N1/16C12N1/14B09B3/00C12R1/465C12R1/225C12R1/11C12R1/125C12R1/10C12R1/085C12R1/72C12R1/645C12R1/01
CPCB09B3/00C12N1/14C12N1/16C12N1/20
Inventor 倪哲齐长青甄胜利刘勇张道利罗彬王洋田素芳陈雨杨庆斌洪慧兰
Owner BEIJING GEOENVIRON ENG & TECH
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