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Immobilized activated sludge and preparation method thereof

A technology of activated sludge and aluminum hydroxide, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. There are few types of problems, to achieve the effect of strengthening the immobilization effect, reducing the loss, and reducing the loss of microorganisms

Active Publication Date: 2021-06-04
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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  • Immobilized activated sludge and preparation method thereof
  • Immobilized activated sludge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An immobilized activated sludge, including the following weight raw materials: 40kg activated sludge, 12kg biochar, 2kg lignin, 0.3kg bacterial powder, 1kg propylene glycol butyl ether, 2kg ethylenediaminetetraacetic acid, 0.8kg calcium carbonate, 3kg bag Embedding agent, 0.6kg aluminum hydroxide, 0.4 parts of hydroxyapatite, 12kg of water.

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

[0025] The biochar is pulverized coconut peat, placed in an anoxic environment, heated to 600°C at a rate of 8°C / min for heating and carbonization, kept for 1 hour, cooled and ground to obtain biochar.

[0026] The bacteria powder is obtained by mixing nitrifying bacteria, Micromonospora rubrum and Bacillus subtilis at 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 immobilized activated sludge, c...

Embodiment 2

[0033] A kind of immobilized activated sludge, including the following weight raw materials: 50kg activated sludge, 15kg biochar, 3kg lignin, 0.5kg bacterial powder, 0.8kg propylene glycol butyl ether, 3kg ethylenediaminetetraacetic acid, 1.2kg calcium carbonate, 5kg Embedding agent, 0.7kg aluminum hydroxide, 0.5 parts of hydroxyapatite, 10kg of water.

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

[0035] The biochar is made by crushing crop straws, placing them in an anoxic environment, heating and carbonizing at a rate of 6°C / min to 500°C, keeping the temperature for 6 hours, and grinding the obtained biochar after cooling.

[0036] The bacteria powder is obtained by mixing nitrifying bacteria, Micromonospora rubrum 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 ...

Embodiment 3

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

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

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Abstract

According to the preparation method of the immobilized activated sludge provided by the invention, all the raw material components are scientifically proportioned, so that all the components synergistically play a role, wherein spatial networks of the added biochar, lignin and the embedding agent are mutually entangled, so the immobilization effect can be enhanced, and the formed spatial network structure can improve the good life of microorganisms, maintain the activity of the microorganisms, reduce the loss of the microorganisms and ensure the sewage treatment effect of the activated sludge; the biochar has strong adsorption capacity, also has the effect of reducing steric hindrance, and can improve the diffusion performance and sedimentation performance of the immobilized activated sludge, so that the sewage treatment effect is improved, and the activated sludge is prevented from bulking; the added bacterial powder and microorganisms in the activated sludge act together, so that the sewage treatment effect is improved; by adding hydroxyapatite, propylene glycol butyl ether and aluminum hydroxide, large-scale growth of filamentous bacteria is inhibited, and the sludge bulking phenomenon is improved; and the hydroxyapatite and the ethylenediamine tetraacetic acid can assist the 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 methods for treating polluted water bodies, such as: biological filter, biological contact oxidation method, activated sludge method, membrane separation method, etc. These methods play an important role in reducing water environmental pollution and removing ammonia nitrogen and COD. Among them, the activated sludge method is a kind of aerobic treatment method that uses suspended microbial flocs to treat organic sewage. It can oxidize biodegradable organic substances in wastewater, so as to achieve the purpose of wastewater purification. However, due to its complex chemical composition, it is difficult to reuse activated sludge, and there are still some disadvantages such as few types of microorganisms, many influencing factors, easy expansion of sludge, and...

Claims

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Application Information

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Patent Type & Authority Applications(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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