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A kind of immobilized activated sludge and preparation method thereof

A technology of activated sludge and biochar, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problem of easy swelling of sludge and residual sludge, difficulty in reusing, microbial species Less problems, to achieve the effect of strengthening the immobilization effect, reducing the loss, and reducing the loss of microorganisms

Active Publication Date: 2022-08-02
HAINAN TIANHONG MUNICIPAL DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its complex chemical composition, activated sludge makes it difficult to reuse, and there are still disadvantages such as few types of microorganisms, many influencing factors, easy swelling of sludge, and a large amount of excess sludge.

Method used

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  • A kind of immobilized activated sludge and preparation method thereof
  • A kind of immobilized activated sludge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An immobilized activated sludge, comprising the following weight raw materials: 40kg activated sludge, 12kg biochar, 2kg lignin, 0.3kg fungus powder, 1kg propylene glycol butyl ether, 2kg EDTA, 0.8kg calcium carbonate, 3kg bag Burial agent, 0.6kg aluminum hydroxide, 0.4 part hydroxyapatite, 12kg water.

[0024] The activated sludge is the primary sedimentation sludge discharged from the primary sedimentation tank.

[0025] The biochar is obtained by pulverizing coconut bran, placing it in an oxygen-deficient environment, heating it to 600°C at a rate of 8°C / min for heating and carbonization, maintaining the temperature for 1 hour, and grinding it after cooling.

[0026] The fungus powder is obtained by mixing nitrifying bacteria, Micromonospora cyanobacterium and Bacillus subtilis in a mass ratio of 1:0.8:1.1.

[0027] The embedding agent is obtained by mixing alginic acid, gelatin and polyvinyl alcohol in a mass ratio of 0.5:1:1.3.

[0028] A preparation method of im...

Embodiment 2

[0033] An immobilized activated sludge, comprising the following weight raw materials: 50kg activated sludge, 15kg biochar, 3kg lignin, 0.5kg fungus powder, 0.8kg propylene glycol butyl ether, 3kg EDTA, 1.2kg calcium carbonate, 5kg Embedding medium, 0.7kg aluminum hydroxide, 0.5 part hydroxyapatite, 10kg water.

[0034] The activated sludge is the excess sludge discharged from the secondary sedimentation tank.

[0035] The biochar is obtained by pulverizing the crop straw, placing it in an oxygen-deficient environment, heating it to 500°C at a rate of 6°C / min for heating and carbonization, maintaining the temperature for 6 hours, and grinding the biochar after cooling.

[0036] The fungus powder is obtained by mixing nitrifying bacteria, Micromonospora cyanobacterium and Bacillus subtilis in a mass ratio of 1:0.6:1.1.

[0037] The embedding agent is obtained by mixing agar, silica gel and polyvinyl alcohol in a mass ratio of 0.8:1:0.9.

[0038] A preparation method of immobi...

Embodiment 3

[0043] The difference between Example 3 and Example 1 is:

[0044] Step S1 is to mix the lignin, embedding agent, water and biochar evenly under the condition of 55 °C, let stand for cooling, add bacterial powder and stir at a speed of 300r / min, and let stand at 0-5 °C for 1.5- 3h to obtain mixture 1;

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Abstract

The present invention provides a method for preparing immobilized activated sludge. The components of the raw materials are scientifically proportioned, so that the components play a synergistic role; wherein, the added biochar, lignin and the space network of the embedding agent are intertwined with each other. , can strengthen the immobilization effect, and the spatial network structure formed by it can improve the life of microorganisms and maintain the activity of microorganisms, reduce the loss of microorganisms, and ensure the sewage treatment effect of activated sludge; biochar has strong adsorption capacity, and has the advantages of reducing The effect of steric hindrance can improve the diffusion performance and settling performance of the immobilized activated sludge, thereby improving the sewage treatment effect and avoiding activated sludge bulking; adding bacteria powder and the microorganisms in the activated sludge work together to improve the sewage treatment effect; By adding hydroxyapatite, propylene glycol butyl ether and aluminum hydroxide, the growth of filamentous bacteria is inhibited, and the sludge bulking phenomenon is improved; and hydroxyapatite and EDTA can also assist activated sludge in sewage treatment.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an immobilized activated sludge and a preparation method thereof. Background technique [0002] At present, there are many ways to treat polluted water, such as: biological filter, biological contact oxidation method, activated sludge method, membrane separation method, etc. These methods play an important role in alleviating water pollution and removing ammonia nitrogen and COD. Among them, the activated sludge method is a kind of aerobic treatment method that uses the suspended growth of microbial flocs to treat organic sewage. It can oxidize the biodegradable organic substances in wastewater, so as to achieve the purpose of wastewater purification. However, due to its complex chemical composition, activated sludge is difficult to reuse, and there are also disadvantages such as few types of microorganisms, many influencing factors, easy sludge expansion and a large amount of e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F3/34
CPCC02F3/12C02F3/34C02F3/1215Y02W10/10
Inventor 柏斌余明柏瑜
Owner HAINAN TIANHONG MUNICIPAL DESIGN CO LTD
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