Salt-tolerant anaerobic ammonia oxidation sludge acclimatization method based on inhibition kinetics law

A technology of anaerobic ammonium oxidation and salt tolerance, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as domestication failure and failure to fully consider microbial tolerance, Achieve high denitrification performance and good domestication results

Inactive Publication Date: 2020-05-12
HANGZHOU NORMAL UNIVERSITY
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Problems solved by technology

However, this domestication method does not fully consider the tolerance of microorganisms, and may not necessarily achieve optimal domestication results, and may even lead to domestication failure

Method used

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  • Salt-tolerant anaerobic ammonia oxidation sludge acclimatization method based on inhibition kinetics law
  • Salt-tolerant anaerobic ammonia oxidation sludge acclimatization method based on inhibition kinetics law

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Embodiment Construction

[0027] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The operating methods not indicated in the following examples are generally in accordance with conventional conditions, or in accordance with the conditions suggested by the manufacturer.

[0028] (1) Use an upflow anaerobic sludge bed reactor with an effective volume of 1.5L. After inoculating 0.6L of anammox granular sludge, place the reactor in a constant temperature room at 35±1°C, anaerobic and dark Operation, the hydraulic retention time is 2.0h, and the total nitrogen load is adjusted according to the operation of the reactor. In this embodiment, it is 6.72~3.36kg N m -3 d -1 .

[0029] The initial influent components are:

[0030]

[0031] Wherein, the trace element I stock solution consists of:

[0032] EDTA ...

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Abstract

The invention discloses a salt-tolerant anaerobic ammonia oxidation sludge acclimatization method based on an inhibition kinetics law, comprising the following steps: (1) inoculating anaerobic ammoniaoxidation granular sludge into a reactor, pumping inlet water according to a mass concentration ratio of NH4<+>-N to NO2<->-N being 1: 1, and operating at 30-36 DEG C in an anaerobic and lucifugal environment to be stable; and (2) adding salt ions into the inlet water; and increasing the concentration of salt ions in stages by adopting a strategy based on the inhibition kinetics law, operating for the same time in each domestication stage, continuously increasing the tolerance of anaerobic ammonia oxidizing bacteria to salinity, and enriching salt-tolerant bacteria until the concentration ofthe salt ions in the inlet water reaches a target concentration, thereby completing domestication of the salt-tolerant anaerobic ammonia oxidation sludge. The anaerobic ammonia oxidation sludge obtained by the domestication method disclosed by the invention can keep relatively high denitrification performance at a high salinity level, has tolerance to a general salinity level, and is beneficial topractical application of an anaerobic ammonia oxidation process.

Description

technical field [0001] The invention relates to the technical field of sludge domestication, in particular to a salt-tolerant anaerobic ammonium oxidation sludge domestication method based on the law of inhibition kinetics. Background technique [0002] In order to alleviate the crisis of fresh water resources in the world today, seawater is increasingly used in people's life and industrial development, which greatly increases the salinity of municipal sewage. In addition, the rapid development of fishery, salted products industry and leather manufacturing industry in recent years has also produced a large amount of saline wastewater. According to incomplete statistics, 5% of the industrial wastewater produced in the world is saline wastewater. The increase in salinity also poses challenges in the field of biological treatment of wastewater. High salinity will cause an increase in osmotic pressure in the water environment, which is also the primary reason for high salinity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/2813
Inventor 金仁村张权付瑾瑾范念斯吴庆元谌金艳黄宝成
Owner HANGZHOU NORMAL UNIVERSITY
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