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Preparation method for immobilization particle used for reducing activated sludge

A technology of activated sludge and granules, applied in biochemical equipment and methods, microorganism-based methods, fixed on or in inorganic carriers, etc. High price and other problems, to achieve the effect of increasing the concentration of sludge degrading bacteria, easy solid-liquid separation, and improving mechanical strength

Active Publication Date: 2015-07-08
天津北洋百川生物技术有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing biological methods for reducing activated sludge involve the application of enzyme preparations and the preparation of high-efficiency microbial agents. The application of enzyme preparations is very limited and expensive, and high-efficiency microbial agents are easily lost during sludge reduction treatment. , and the start-up time is long in the early stage, and repeated feeding and process debugging are required to play its function, so the cost is high

Method used

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preparation example Construction

[0021] The preparation method of the immobilized particles of reduced activated sludge of the present invention comprises the following steps:

[0022] 1) placing the screened sludge-degrading bacterial strains, including Bacillus subtilis, Bacillus cereus, Bacillus megaterium, Bacillus licheniformis, and Bacillus pumilus, in a squeeze bed for culture to make a fermentation broth;

[0023] The fermentation broth corresponding to each of the above strains is mixed according to the following weight ratio: Bacillus subtilis: Bacillus cereus: Bacillus megaterium: Bacillus licheniformis: Bacillus pumilus is 4-6: 4-6: 6-9: 5- 7:4;

[0024] 2) Spray-dry the above-mentioned mixed bacteria solution to make bacteria powder. The spray-drying process conditions are controlled as follows: the inlet temperature of the dryer is 175°C-190°C, the outlet temperature is 80-90°C, the atomizer speed is 200-220rpm, and the feed Speed ​​control is 30-50ml / min;

[0025] 3) Use the PVA-saturated bor...

Embodiment 1

[0033] 1) The fermentation broth corresponding to each bacterial strain is mixed according to the following weight ratio: Bacillus subtilis: Bacillus cereus: Bacillus megaterium: Bacillus licheniformis: Bacillus pumilus is 4: 4: 6: 5: 4;

[0034] 2) Spray-dry the above-mentioned mixed bacteria solution to make bacteria powder. The spray-drying process conditions are controlled as follows: the inlet temperature of the dryer is 175°C-190°C, the outlet temperature is 80-90°C, the atomizer speed is 200-220rpm, and the feed Speed ​​control is 30-50ml / min;

[0035] 3) Prepare the immobilized granules by using the PVA-saturated boric acid method to prepare the above-mentioned bacterial powder. The preparation method is: weigh 80g of polyvinyl alcohol and dissolve it in 1000ml of water. Add the above-mentioned bacteria powder at the concentration of / L, add 0.02% sodium alginate and 4% silicon dioxide at the same time, stir and mix well;

[0036] Prepare a saturated boric acid soluti...

Embodiment 2

[0038] 1) The fermentation broth corresponding to each bacterial strain is mixed according to the following weight ratio: Bacillus subtilis: Bacillus cereus: Bacillus megaterium: Bacillus licheniformis: Bacillus pumilus is 6: 6: 9: 7: 4;

[0039] 2) Spray-dry the above-mentioned mixed bacteria solution to make bacteria powder. The spray-drying process conditions are controlled as follows: the inlet temperature of the dryer is 175°C-190°C, the outlet temperature is 80-90°C, the atomizer speed is 200-220rpm, and the feed Speed ​​control is 30-50ml / min;

[0040] 3) Use the PVA-saturated boric acid method to prepare the immobilized granules from the bacteria powder prepared above. The preparation method is: weigh 80g of polyvinyl alcohol and dissolve it in 1000ml of water. Add the above-mentioned bacteria powder at the concentration of / L, add 0.02% sodium alginate and 4% silicon dioxide at the same time, stir and mix well;

[0041] Configure a saturated boric acid solution, adju...

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Abstract

The invention provides a preparation method for an immobilization particle used for reducing activated sludge. The preparation method comprises the following steps: uniformly mixing fermentation broths of corresponding strains according to a weight ratio of Bacillus subtilis to Bacillus cereus to Bacillus megaterium to Bacillus licheniformis to Bacillus pumilus of 4-6: 4-6: 6-9: 5-7: 4; preparing bacterial powder from the above mentioned mixed bacterial liquid through spray drying; and preparing the immobilization particle by using a PVA-saturated boric acid method. By using an immobilization method, high-efficiency sludge degrading bacterial strains are embedded, so the concentration of the sludge degrading bacterial strains participating in a reaction can be greatly increased, the bacterial strains are vulnerable to loss and dying, have longer action time and obviously improved antitoxin capability and tolerance, solid-liquid separation can be easily realized, and secondary pollution is small.

Description

technical field [0001] The invention relates to the technical field of environmental protection applications, in particular to a method for preparing immobilized particles of reduced-weight activated sludge. Background technique [0002] The activated sludge method is currently the most widely used sewage treatment technology. Under the premise of ensuring the water quality of sewage treatment, it produces a large amount of residual activated sludge with a high water content (about 80%). The sewage treatment plant is currently in operation nationwide. Most of the sewage treatment plants use mechanical dehydration to treat it and then landfill it, and there is no follow-up special treatment method, and the activated sludge after treating industrial wastewater contains a large amount of heavy metal ions and toxic and harmful substances. Volatilization can easily cause serious impact on the environment. [0003] At present, there are many ways to reduce the amount of activated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N11/14C12N11/10C12N11/08C12N11/04C12R1/125C12R1/085C12R1/11C12R1/10C12R1/07
Inventor 乔长晟王羿超李雪盖丽丰
Owner 天津北洋百川生物技术有限公司
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