Acidophilic mixed strain, rapid preparation method and application thereof

A mixed strain and acidophilic technology, which is applied in the field of environmental engineering, can solve the problems of complex and slow operation of strain acquisition, and achieve the effect of guaranteed species and concentration, long time and short time

Pending Publication Date: 2020-10-13
ZHONGYUAN ENGINEERING COLLEGE +1
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  • Description
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  • Application Information

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Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention proposes an acidophilic mixed strain and its rapid preparation method and application, and also solves the problem that the existing strain acquisition operation is complicated and slow

Method used

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  • Acidophilic mixed strain, rapid preparation method and application thereof
  • Acidophilic mixed strain, rapid preparation method and application thereof
  • Acidophilic mixed strain, rapid preparation method and application thereof

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Embodiment

[0040] The present invention is the method for the rapid and efficient acquisition of bioleaching strains, and the specific steps are as follows:

[0041] (1) Screening of bioleaching strains

[0042] a. According to the inoculation ratio of 10%, take 15ml of the test sludge and 135ml of Thiobacillus thiooxidans liquid culture medium into a 250ml Erlenmeyer flask, and place it in an intelligent constant temperature shaking incubator at 180r / min and 28°C for continuous oscillation. Use ultrapure water to supplement the evaporated water every 12 hours, and measure the pH until the pH is as low as about 1.5 and the screening of Thiobacillus thiooxidans is completed. For specific data, see figure 1 a. It can be seen from the comparison document 1a that during the screening process of Thiobacillus thiooxidans, the pH value of the system can be reduced from 5.8 to about 1.0 within 7 days, and the strain screening is completed. Within 1-2 days, the pH value of the system decreased...

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Abstract

The invention belongs to the field of environmental engineering, and provides an acidophilic mixed strain, a rapid preparation method and application thereof. The method comprises the following steps:firstly, screening thiobacillus thiooxidans and thiobacillus ferrooxidans in sludge by using a thiobacillus thiooxidans culture medium and a thiobacillus ferrooxidans culture medium which are self-prepared; secondly, respectively carrying out amplification culture on the strain obtained by screening for three times by using the prepared culture medium according to different inoculation proportions; and finally, inoculating the bacteria subjected to amplification culture into required sludge for sludge domestication, and carrying out sludge domestication culture for three times to obtain the strain required by bioleaching. Compared with a traditional method, strain counting is not needed, the operation is easy and convenient, and the strain obtaining time is shorter.

Description

technical field [0001] The invention belongs to the field of environmental engineering and relates to a conditioning method for sludge, in particular to an acidophilic mixed strain and its rapid preparation method and application. Background technique [0002] According to statistics, the amount of urban sludge in my country has increased rapidly in recent years, and the requirements for sludge treatment technology are getting higher and higher. Municipal sludge is rich in organic matter, nitrogen, phosphorus and other plant nutrients. It has good development prospects in landscaping, composting, and soil improvement. However, it has high requirements for the moisture content of sludge: generally it needs to reach 40 %-60%. The moisture content of dewatered sludge in existing sewage treatment plants is generally as high as 70%-80%, which is difficult to meet the moisture content requirements for subsequent sludge disposal. In addition, some sewage treatment plants are mixe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12N1/02C12N1/36C02F11/02C02F11/12C12R1/01
CPCC02F11/02C02F11/12C12N1/02C12N1/20C12N1/36
Inventor 窦艳艳刘杰张可龚为进王俊田振邦李宾宾
Owner ZHONGYUAN ENGINEERING COLLEGE
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