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Synergic denitrification technology of heterotrophic nitrification and aerobic denitrification bacteria and ammonia oxidizing bacteria

A technology of aerobic denitrifying bacteria and ammonia oxidizing bacteria, applied in aerobic and anaerobic process treatment, chemical instruments and methods, sustainable biological treatment, etc., can solve the problem of limited reaction speed, special nutritional requirements, and slow growth of AOB and other problems, to achieve the effect of simple process and improved processing efficiency

Active Publication Date: 2017-01-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, AOB grows slowly and has special nutritional requirements, which limits the reaction speed of this step.

Method used

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  • Synergic denitrification technology of heterotrophic nitrification and aerobic denitrification bacteria and ammonia oxidizing bacteria
  • Synergic denitrification technology of heterotrophic nitrification and aerobic denitrification bacteria and ammonia oxidizing bacteria

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Table 1 Analysis of the feed water properties of a certain SBR reactor

[0025] index Concentration (mg / L) TS 700 BOD 200 TOC 160 COD 400 TN 40 free ammonia 25

[0026] 1) Cultivation and domestication of SBR reactor seed sludge

[0027] Pure culture of heterotrophic nitrifying and aerobic denitrifying bacteria: Heterotrophic nitrifying and aerobic denitrifying bacteria (Alcaligenes faecalis: Alcaligenesfaecalis No.4) were stored in 25% glycerin solution at -80°C and shaken at 37°C Take it after 72 hours of cultivation in the bed.

[0028] Enrichment and domestication of ammonia oxidizing bacteria (AOB): from the nitrification tank of a nitrification and denitrification reactor.

[0029] The influent water in Table 1 is introduced into the 10LSBR reactor containing the composite granular sludge of Alcaligenes faecalis and ammonia oxidizing bacteria (hanging film on the non-woven filler) for treatment, and the tempera...

Embodiment 2

[0032] Example 2: Continuous Flow Reactor

[0033] Table 2 Analysis of feedwater properties of a continuous flow reactor

[0034] index Concentration (mg / L) TS 700 BOD 200 TOC 160 COD 400 TN 40 free ammonia 25

[0035] 1) Cultivation and domestication of seed sludge in continuous reactor

[0036] Pure culture of heterotrophic nitrifying and aerobic denitrifying bacteria: Heterotrophic nitrifying and aerobic denitrifying bacteria (Alcaligenes faecalis: Alcaligenesfaecalis No.4) were stored in 25% glycerin solution at -80°C and shaken at 37°C Take it after 72 hours of cultivation in the bed.

[0037] Enrichment and domestication of ammonia oxidizing bacteria (AOB): from the nitrification tank of a nitrification and denitrification reactor.

[0038] The water in Table 2 is introduced into a 10L continuous reactor containing composite granular sludge of Alcaligenes faecalis and ammonia oxidizing bacteria (hanging film on non-w...

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Abstract

The invention discloses a synergic denitrification technology of heterotrophic nitrification and aerobic denitrification bacteria and ammonia oxidizing bacteria. The synergic denitrification technology is characterized in that organic carbon and part of ammonia nitrogen in domestic sewage are removed through the heterotrophic nitrification and aerobic denitrification bacteria, and the purpose of removing the ammonia nitrogen and the organ carbon in the domestic sewage is achieved by the aid of the advantage of promoting growth of the ammonia oxidizing bacteria through an intermediate reaction product-hydroxylamine and converting the rest of the ammonia nitrogen in the domestic sewage into nitrite nitrogen through the ammonia oxidizing bacteria. A biofilm culturing method is adopted in the technology, a granular structure that the ammonia oxidizing bacteria is wrapped through the heterotrophic nitrification and aerobic denitrification bacteria is formed to promote the synergic effect of two bacteria, denitrification reaction by additionally adding carbon source is not needed, simpleness in the process is achieved, and the organ carbon and the ammonia nitrogen in the domestic sewage are effectively removed.

Description

technical field [0001] The present invention relates to a synergistic denitrification process of heterotrophic nitrifying aerobic denitrifying bacteria and ammonia oxidizing bacteria, in particular to a process based on the use of heterotrophic nitrifying aerobic denitrifying bacteria (outer) and ammonia oxidizing bacteria (AOB) (inner) Granular sludge structure effectively removes organic carbon and ammonia nitrogen in urban domestic sewage under medium and low temperature conditions, and generates nitrite nitrogen. Background technique [0002] Urban domestic sewage mainly refers to the general term for all sewage discharged to maintain the daily life of residents. The treatment level of urban domestic sewage is directly related to the living and working environment of urban residents. Therefore, it is particularly important to properly deal with the domestic sewage problem and reduce its damage to the natural environment to improve the quality of life and work of urban r...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/12
CPCC02F3/1263C02F3/301C02F3/302C02F3/307C02F2101/16Y02W10/10
Inventor 戴晓虎李宁娄竞丹华煜李旭曜
Owner TONGJI UNIV
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