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Dosing method of thiobacillus thiooxidans energy substances for municipal sludge dehydration treatment

A technology of Thiobacillus thiooxidans and municipal sludge, which is applied in the fields of biological sludge treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problems that cannot fully meet the requirements of leaching microbial proliferation, affect the number and activity of microorganisms, and affect biological Leach acidification and oxidation efficiency and other issues, to achieve the effect of benefiting subsequent resource utilization, low risk of secondary pollution, and short conditioning time

Inactive Publication Date: 2021-01-05
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leaching microorganisms mainly use reducing sulfur and ferrous sources as energy substances, but the sulfur and Fe contained in sludge 2+ It cannot fully satisfy the large-scale reproduction of leaching microorganisms, so in the process of bioleaching, it is necessary to add enough energy substances from the outside to ensure the smooth progress of the metabolism of leaching microorganisms
The type and dosage of energy substances will directly affect the number and activity of microorganisms in the bioleaching process, thereby affecting the acidification and oxidation efficiency of bioleaching

Method used

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  • Dosing method of thiobacillus thiooxidans energy substances for municipal sludge dehydration treatment
  • Dosing method of thiobacillus thiooxidans energy substances for municipal sludge dehydration treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 (sulfur source type (S in the dehydration process) 0 and Na 2 S 2 o 3 )Research)

[0024] The sludge used in this experiment was taken from the residual sludge in the secondary sedimentation tank of a certain urban sewage plant, and its basic properties are shown in Table 1.

[0025] Table 1 Basic properties of the sludge tested

[0026]

[0027]

[0028] The test procedure is as follows:

[0029] (1) Take 150mL of the test sludge with the properties shown in Table 1, do not add 2g / L single sulfur source (S 0 and Na 2 S 2 o 3 ), placed in a water bath shaker at a speed of 180r / min and shaken at a constant temperature of 28°C for culture; when the pH value of the sludge system was 2.8, the first culture was completed to obtain 20 mL of culture; then, to the second Add 130mL of the test sludge with the properties shown in Table 1 to the primary culture, and carry out the second shake flask culture under the same conditions; finally, add 6.5 vol...

Embodiment 2

[0033] Embodiment 2 (ferrous iron source composite sulfur source (Na 2 S 2 o 3 +FeSO 4 、Na 2 S 2 o 3 +FeCl 2 )Research)

[0034] The test procedure is as follows:

[0035] (1) Take 150mL of test sludge with the properties shown in Table 1, add 6g / L ferrous source to compound 2g / L sulfur source (Na 2 S 2 o 3 +FeSO 4 、Na 2 S 2 o 3 +FeCl 2), placed in a water bath shaker at a speed of 180r / min and shaken at a constant temperature of 28°C for culture; when the pH value of the sludge system was 2.8, the first culture was completed to obtain 20 mL of culture; then, to the second Add 130mL of the test sludge with the properties shown in Table 1 to the primary culture, and carry out the second shake flask culture under the same conditions; finally, add 6.5 volumes of the test sludge with the properties shown in Table 1 to the second culture. The sludge was cultured in shake flasks repeatedly to obtain the inoculum;

[0036] (2) the inoculum that step (1) obtains is dr...

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Abstract

The invention belongs to the technical field of solid waste treatment and disposal, and particularly discloses a dosing method of thiobacillus thiooxidans energy substances for municipal sludge dehydration treatment, which specifically comprises the following steps: respectively adding a single sulfur source or a sulfur source compounded iron source into municipal sludge, carrying out constant-temperature culture, then, adding new municipal sludge into the first culture, repeating the steps for two times to obtain an inoculum, putting the obtained inoculum into municipal sludge to be dehydrated, respectively adding a single sulfur source or a sulfur source compounded iron source, and carrying out constant-temperature culture to obtain treated sludge. The single sulfur source or ferrous source compounded sulfur source is used for conditioning before dehydration, the reaction is mild, the secondary pollution risk is small, the conditioning time is short, deep dehydration of municipal sludge can be essentially promoted, and sludge treatment is facilitated. Because microorganisms involved in conditioning are mainly chemical energy autotrophic bacteria, semi-dried sludge formed after biological conditioning and mechanical dehydration is high in organic matter and dry basis calorific value, the loss of beneficial components is small, and resource utilization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and disposal, and in particular relates to a method for dosing Thiobacillus thiooxidans energy substances used for urban sludge dehydration treatment. Background technique [0002] In recent years, with the rapid development of China's economy, the improvement of people's quality of life, the continuous advancement of urbanization and the construction of new countryside, the sewage treatment industry has grown rapidly in my country. As a by-product of sewage treatment, municipal sludge is also rapidly increasing. However, due to the "heavy water and light mud" mode in the traditional sewage sludge treatment process, it often happens that the sludge is randomly piled up or simply landfilled without effective treatment, and toxic and harmful substances such as organic pollutants and pathogenic microorganisms in the sludge pass through Rainwater flushing or surface runoff enters the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F11/12
CPCC02F11/02C02F11/12
Inventor 石明岩王佳德耿雨馨徐泽鹏翟心瑜徐尉宁洪伟彬华天钰
Owner GUANGZHOU UNIVERSITY
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