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A method of strengthening denitrification bacteria denitrification by using filamentous fungi as a carrier

A technology for denitrifying bacteria and denitrification, applied in chemical instruments and methods, microorganism-based methods, biochemical equipment and methods, etc., can solve the problems of low success rate and long cultivation time of mixed mycelium balls, and achieve recycling and utilization. High rate, high reusability, and pollution reduction effect

Active Publication Date: 2021-05-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a high removal effect, but there are defects such as long culture time of mixed mycelium balls and low success rate.

Method used

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  • A method of strengthening denitrification bacteria denitrification by using filamentous fungi as a carrier
  • A method of strengthening denitrification bacteria denitrification by using filamentous fungi as a carrier
  • A method of strengthening denitrification bacteria denitrification by using filamentous fungi as a carrier

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Enrichment culture of denitrifying bacteria: Take some sludge from the anoxic pool of the sewage treatment plant. Wash it with phosphate buffer (pH=7) and pass through a 200-mesh sieve to remove excess impurities. Dilute activated sludge and distilled water at a volume ratio of 1:4. After standing still for 1 hour, take 10ml of the mud-water mixture in the middle layer, put it in a conical flask, add 90ml of denitrification culture solution (Table 1 and Table 2), and feed argon to remove oxygen to ensure anaerobic conditions. When the nitrate concentration of the culture solution is reduced to a certain level, the mixed solution is taken and centrifuged at 4000 r / min for 15 minutes to obtain denitrifying bacteria. The same method was repeated three times to obtain denitrifying bacteria with relatively high abundance.

[0053] (2) Preparation of the denitrifying bacteria suspension: resuspend 1 g of the denitrifying bacteria sediment in (1) with 100 ml of sterilize...

Embodiment 2

[0071] (1) Enrichment culture of denitrifying bacteria: Take some sludge from the anoxic pool of the sewage treatment plant. Wash it with phosphate buffer (pH=7) and pass through a 200-mesh sieve to remove excess impurities. Dilute activated sludge and distilled water at a volume ratio of 1:4. After standing still for 1 hour, take 10ml of the mud-water mixture in the middle layer, put it in a conical flask, add 90ml of denitrification culture solution, and pass in argon to remove oxygen to ensure anaerobic conditions. When the nitrate concentration of the culture solution is reduced to a certain level, the mixed solution is taken and centrifuged at 4000 r / min for 15 minutes to obtain denitrifying bacteria. The same method was repeated three times to obtain denitrifying bacteria with relatively high abundance.

[0072] (2) Preparation of the denitrifying bacteria suspension: resuspend 1 g of the denitrifying bacteria sediment in (1) with 100 ml of sterilized water to obtain t...

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Abstract

The invention discloses a method for strengthening denitrification bacteria denitrification by using filamentous fungi as carriers, and belongs to the technical field of sewage biological treatment. The method of the present invention comprises: inoculating an appropriate amount of mud-water mixture and cultivating it in the denitrification enrichment culture solution to obtain a bacterial suspension of denitrifying bacteria; Mycelial balls: Inoculate the denitrifying bacteria suspension into the denitrification culture solution containing mature mycelial balls to strengthen the denitrification effect of the denitrifying bacteria, and collect the mycelial balls repeatedly. The Talaromyces flavus S1 mycelium ball used in the method of the present invention has a better denitrification effect than the existing Trichodermavirid mycelium ball immobilized denitrification bacteria, and it not only has the advantages of simple operation, good sedimentation performance and high reuse rate, but also Strengthen the denitrification effect of denitrifying bacteria, provide a basis for the practical application of denitrifying bacteria in the future, and open up the practical application prospect of Talaromyces flavus S1.

Description

technical field [0001] The invention relates to a method for strengthening denitrification bacteria denitrification by using filamentous fungi as carriers, and belongs to the technical field of sewage biological treatment. Background technique [0002] In recent years, the irrational use of nitrogen-containing fertilizers, the random discharge of sewage, and the untreated leakage of landfill leachate have resulted in a large amount of nitrate in the water. Excessive nitrates can threaten human health, such as acute methemoglobinemia and blue baby syndrome. Therefore, in recent years, efforts have been made to remove nitrate from groundwater. Compared with the limitations of physical and chemical methods, such as high cost, poor effect, and difficult implementation, the use of biological methods to remove nitrate pollution in water has attracted people's attention. [0003] The removal of nitrate in water is mainly reduced by denitrification, and the microorganisms involved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N11/16C12N1/20C12N1/14C02F3/34C12R1/645C02F101/16
CPCC02F3/34C02F2101/16C12N1/14C12N1/20C12N11/16
Inventor 缪恒锋周梦娟阮文权
Owner JIANGNAN UNIV