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Microbial growth promoter and its application for completing nitrification process

A growth accelerator and accelerator technology, applied in the field of microorganisms, can solve problems such as high content of accelerator metal salts, secondary pollution of sewage, etc., to achieve increased growth rate and biological activity, improved ammonia nitrogen removal rate, good environment and biocompatibility sexual effect

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal salt content in the accelerator is relatively high, and it will cause secondary pollution of sewage after long-term dosing

Method used

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  • Microbial growth promoter and its application for completing nitrification process
  • Microbial growth promoter and its application for completing nitrification process
  • Microbial growth promoter and its application for completing nitrification process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The COD concentration of the main pollutant contained in the wastewater discharged by a factory is about 400mg / L, and the concentration of ammonia nitrogen is about 150mg / L. The concentration is less than 60mg / L, but the ammonia nitrogen concentration is still as high as 50mg / L or more. Add the accelerant prepared in Table 1 to the treatment system, and add it according to the concentration of the accelerant in the sewage at 0.5 mg / L every day. After 15 days of adding, the removal rate of ammonia nitrogen has increased by more than 10%. Stop adding and the system continues to operate. After 10 days, water samples were taken to analyze the concentration of ammonia nitrogen in the effluent and the removal rate of ammonia nitrogen was calculated. The specific treatment effects are shown in Table 2.

[0020] Table 2 Treatment effect of using different accelerators

[0021]

[0022] It can be seen from the data in Table 2 that after using the accelerator, the concentrati...

Embodiment 2

[0024] The treatment process and operating conditions are the same as in Example 1, except that a certain amount of auxiliary agent is added at the same time as the 1# accelerator, and the composition, dosage and effect of the auxiliary agent are shown in Table 3.

[0025] Table 3 Treatment effect of adding different additives at the same time

[0026]

[0027] It can be seen from Table 3 that with the addition of additives, the concentration of ammonia nitrogen is further reduced to less than 10mg / L, and the removal rate is greater than 80%, which further improves the treatment effect.

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Abstract

The invention relates to a microbial growth promoter for completion of nitrification. The microbial growth promoter comprises at least one glycolipid selected from a group consisting of trehalose lipid, sophorolipid, rhamnolipid and the like, wherein the sophorolipid comprises lactone type sophorolipid and acid type sophorolipid; and the microbial growth promoter preferably comprises sophorolipid,more preferably, acid type sophorolipid. The invention also provides application of the microbial growth promoter. The microbial growth promoter can be used for cultivation of nitrification bacteria,and can be directly added into a sewage treatment system including a nitrification unit to increase the ammonia and nitrogen removal effect of the sewage treatment system; and the microbial growth promoter can also be used for rapid start-up of a nitrification procedure of an ammonia-containing system and for rapid recovery of impacted systems. The promoter is simple in formula and easy to prepare; when applied to nitrification, the promoter allows nitrification bacteria in slow growth to rapidly grow and breed in a short period of time; and the cultured bacteria has the characteristics of high activity, good flocculation performance, long usage time, strong impact tolerance, etc.

Description

technical field [0001] The invention belongs to the technical field of microorganisms, and in particular relates to a microorganism growth accelerator for completing the nitrification process and its application. Background technique [0002] In the biological nitrogen removal method, whether it is the traditional nitrification-denitrification, or the new short-range nitrification-denitrification and short-range nitrification-ANAMMOX, the ammonia nitrogen needs to be removed through the nitrification of nitrifying bacteria. Nitrifying bacteria belong to chemotrophic microorganisms, and biological cells can only use the energy stored in the form of ATP, etc., and cannot directly use the free energy released by chemical reactions. In aerobic metabolism, ATP is mainly synthesized by oxidative phosphorylation of the respiratory chain. The ammonia oxidative phosphorylation efficiency is very low, and the ATP that can be produced is very limited, and the energy is mainly used for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/38C02F3/34
CPCC02F3/34C02F2101/16C02F2305/06C12N1/38
Inventor 高会杰孙丹凤郭志华赵胜楠陈明翔
Owner CHINA PETROLEUM & CHEM CORP
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