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Method for processing sludge by utilizing thermophile bacteria reinforcement ATAD (Autothermal Thermophilic Aerobic Digestion) process

A high-temperature aerobic digestion and self-heating technology, which is applied in biological sludge treatment and other fields, can solve the problems of few basic research reports and no breakthrough progress and results, and achieve the improvement of sludge degradation rate, efficiency and no waste. The effect of degree of harm

Inactive Publication Date: 2013-04-24
天津市工业微生物研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the thermophilic bacteria-enhanced self-heating high-temperature aerobic digestion process for sludge treatment has been industrialized to a certain extent abroad, but it has not been widely carried out in my country. There are few related basic research reports and no breakthrough progress and results. , the breeding, screening and domestication of its core technology thermophilic strains are still in the initial stage of exploration

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  • Method for processing sludge by utilizing thermophile bacteria reinforcement ATAD (Autothermal Thermophilic Aerobic Digestion) process
  • Method for processing sludge by utilizing thermophile bacteria reinforcement ATAD (Autothermal Thermophilic Aerobic Digestion) process
  • Method for processing sludge by utilizing thermophile bacteria reinforcement ATAD (Autothermal Thermophilic Aerobic Digestion) process

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for treating sludge using thermophilic bacteria to strengthen the self-heating high-temperature aerobic digestion process, the steps of the method are:

[0028] The solid content of the sludge to be treated is 5%, the VSS concentration is 30gL, and the weight is 100kg.

[0029] ⑴ Preparation of dominant bacterial agent:

[0030] Bacillus subtilis A2, Bacillus stearothermophilus M1, Bacillus pumilus T6 and Bacillus licheniformis N2 were mixed according to the proportion of 2:3:4:1 to prepare the dominant bacterial agent, and the concentration of the dominant bacterial agent was 10 9 individual / g, pH 7.

[0031] Bacillus subtilis A2 0.3Kg,

[0032] Bacillus stearothermophilus M1 0.45Kg,

[0033] Bacillus pumilus T6 0.6Kg,

[0034] Bacillus licheniformis N2 1.5Kg.

[0035] ⑵, pre-concentration treatment:

[0036] Transport the sludge to be treated to the pre-concentration tank 1 to stay for 5 hours;

[0037] ⑶ Self-heating high-temperature aerobic digestion...

Embodiment 2

[0044] A method for treating sludge using thermophilic bacteria to strengthen the self-heating high-temperature aerobic digestion process, the steps of the method are:

[0045] The solid content of the sludge to be treated is 8%, the VSS concentration is 40gL, and the weight is 500kg.

[0046] Preparation of dominant bacteria agent:

[0047] Bacillus subtilis A2, Bacillus stearothermophilus M1, Bacillus pumilus T6 and Bacillus licheniformis N2 were mixed according to the proportion of 3:3:2:2 to prepare the dominant bacterial agent, and the concentration of the dominant bacterial agent was 10 11 individual / g, pH 8.

[0048] Bacillus subtilis A2 4.8Kg,

[0049] Bacillus stearothermophilus M1 4.8Kg,

[0050] Bacillus pumilus T6 3.2Kg,

[0051] Bacillus licheniformis N2 3.2Kg.

[0052] ⑵, pre-concentration treatment:

[0053] Transport the sludge to be treated to the pre-thickening tank for 10 hours;

[0054] ⑶ Self-heating high-temperature aerobic digestion treatment:

...

Embodiment 3

[0061] A method for treating sludge using thermophilic bacteria to strengthen the self-heating high-temperature aerobic digestion process, the steps of the method are:

[0062] The solid content of the sludge to be treated is 6%, the VSS concentration is 48gL, and the weight is 2000kg.

[0063] ⑵ Preparation of dominant bacteria agent:

[0064] Bacillus subtilis A2, Bacillus stearothermophilus M1, Bacillus pumilus T6 and Bacillus licheniformis N2 were mixed according to the proportion of 2:2:3:3 to prepare the dominant bacterial agent, and the concentration of the dominant bacterial agent was 10 12 individual / g, pH 9.

[0065] Bacillus subtilis A2 20Kg,

[0066] Bacillus stearothermophilus M1 20Kg,

[0067] Bacillus pumilus T6 30Kg,

[0068] Bacillus licheniformis N2 30Kg.

[0069] ⑵, pre-concentration treatment:

[0070] Transport the sludge to be treated to the pre-thickening tank for 20 hours;

[0071] ⑶ Self-heating high-temperature aerobic digestion treatment:

[...

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Abstract

The invention relates to a method for processing sludge by utilizing a thermophile bacteria reinforcement ATAD (Autothermal Thermophilic Aerobic Digestion) process. The method comprises the following steps of: (1) preparing an advantage bacterial agent; (2) carrying out pre-concentration processing; (3) carrying out ATAD processing; and (4) carrying out storage. According to the invention, thermophile bacteria with strong capacity of degrading organic matter in the sludge are screened and acclimatized by adopting a modern biotechnology; the method does not just depend on the thermophile bacteria of the sludge; the short-time high-efficiency degradation characteristic for the sludge is realized by utilizing an active extracellular enzyme secreted by the thermophile bacteria at high temperature; the method is combined with the ATAD process to improve reduction efficiency and harmless degree of the sludge; a novel technological approach is provided for fulfilling the aims of reduction, harmlessness and reutilization of the sludge; wider technical means and process are developed; and cost of processing and disposing the sludge is reduced.

Description

technical field [0001] The invention belongs to the technical field of urban sewage treatment, in particular to a method for treating sludge by using thermophilic bacteria to strengthen a self-heating high-temperature aerobic digestion process. Background technique [0002] A considerable amount of suspended matter retained during wastewater treatment is called sludge solids, and its mixture with water is called sludge. The sludge output usually accounts for 0.3%-0.5% (volume) of the sewage volume. The composition, nature and quantity of the sludge mainly depend on the source of the wastewater and the sewage treatment process. The sludge components are mainly composed of inorganic and organic substances, and also contain Nitrogen, phosphorus, potassium, heavy metal ions, pathogenic microorganisms, parasite eggs and other substances can generally be divided into primary sedimentation tank sludge, humic sludge and residual sludge, digestive sludge and chemical sludge. Sludge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02
Inventor 魏呐何雨青张英筠许勤虎王祥河温冰张仲信刘阳程伟吴頔王珺郭伟
Owner 天津市工业微生物研究所有限公司
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