A short-range synchronous nitrification and denitrification method for denitrification of sewage

A simultaneous nitrification and denitrification technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of unstable denitrification effect and mutual restriction of microbial functions, and achieve stability Short-cut nitrification process, improved treatment effect, and high-efficiency denitrification effect

Active Publication Date: 2020-06-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The invention realizes short-range synchronous nitrification and denitrification by adding nitrite-type denitrification bacteria and microbial growth promoter at the same time, and solves the mutual restriction of microbial functions and unstable denitrification effect encountered in the practical application of synchronous nitrification and denitrification. question

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  • A short-range synchronous nitrification and denitrification method for denitrification of sewage
  • A short-range synchronous nitrification and denitrification method for denitrification of sewage
  • A short-range synchronous nitrification and denitrification method for denitrification of sewage

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example 1-8

[0028] Ammonia-containing wastewater produced in a urea production process, NH in wastewater 3 -The average concentration of N is 450mg / L, the average concentration of total nitrogen (TN) is 500mg / L, COD Cr The average concentration is 150mg / L. When the A / O system is used for long-term operation, the ammonia nitrogen removal rate reaches 60%, and the total nitrogen removal rate is less than 50%.

[0029] Adopt the method of the present invention to process, add nitrous acid type denitrification bacteria and microbial growth promoter according to the method described in Table 3, all adopt the mode of adding once every other day, after adding for 15 days, different nitrous acid type denitrification bacteria The treatment effects of nitrogen bacteria and different growth promoter combinations are shown in Table 3.

[0030] Table 3 Treatment effects of different nitrous bacteria and different growth promoter combinations

[0031]

[0032] It can be seen from Examples 1-6 in ...

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Abstract

The invention relates to a shortcut simultaneous nitrification and denitrification method for nitrogen removal of wastewater. The method includes the steps of: adding nitrous acid type denitrifying bacteria and a microorganism growth accelerator to an ammonia-containing wastewater treatment system, wherein the nitrous acid type denitrifying bacteria may be a single bacteria or a compound bacterial inoculant that can utilize nitrite nitrogen; the microorganism growth accelerator includes metal salt, a polyamine substance, organic acid hydroxylamine, and Na2SO3. The metal salt is composed of a calcium salt, a copper salt, a magnesium salt and / or a ferrous salt. Through addition of the nitrous acid type denitrifying bacteria and the microorganism growth accelerator, shortcut simultaneous nitrification and denitrification is achieved. The method solves the problems of mutual limitation of microbial functions and instability of nitrogen removal effects during practical application of simultaneous nitrification and denitrification.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage biological treatment, and relates to a method for treating ammonia-containing sewage, in particular to a sewage treatment method capable of realizing short-range synchronous nitrification, denitrification and denitrification. Background technique [0002] Simultaneous nitrification and denitrification (SND) means that the nitrification and denitrification reactions are carried out simultaneously in the same reactor. This new denitrification process not only overcomes the shortcomings of the traditional biological denitrification process of nitrification and denitrification in two different reactors or sequentially in the same reactor (SBR), but also reduces energy and material consumption. etc. have outstanding advantages, especially the SND process with nitrite nitrogen has more obvious advantages. For example, in the nitrification stage, the oxygen supply can be reduced...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/16
CPCC02F3/302C02F3/34C02F2101/16C02F2305/06
Inventor 高会杰孙丹凤郭志华赵胜楠李宝忠
Owner CHINA PETROLEUM & CHEM CORP
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