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A whole-process autotrophic denitrification method suitable for sewage with large fluctuation of cod/n

A whole-process autotrophic denitrification and sewage technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex maintenance and management, increased treatment costs, and high operating costs

Active Publication Date: 2021-02-26
TONGJI UNIV
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Problems solved by technology

However, this method not only increases the processing cost, but also requires complicated maintenance and management and extremely high operating costs.

Method used

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  • A whole-process autotrophic denitrification method suitable for sewage with large fluctuation of cod/n
  • A whole-process autotrophic denitrification method suitable for sewage with large fluctuation of cod/n
  • A whole-process autotrophic denitrification method suitable for sewage with large fluctuation of cod/n

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Experimental program
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Embodiment Construction

[0027] The first step is to establish the CANON process system

[0028]1. Inoculate the 2L CANON sludge cultivated in this laboratory, add water to dilute to 2.5L, and put it into an SBR reactor with a total volume of 3L and an effective volume of 2.5L (see figure 1 ), the sludge concentration in the reactor after inoculation was 4105mgSS / L.

[0029] The method of cultivating CANON sludge in this laboratory is: inoculate the anaerobic ammonium oxidation granular sludge with small particle size and short-range nitrification floc sludge into the SBR reactor, adjust the ammonia nitrogen concentration in the influent to 300±20mg / L, and carry out exposure Anaerobic operation.

[0030] 2. Determine the operation mode of the SBR reactor, and set each cycle as: water inflow for 20 minutes, reaction for 420 minutes (each aeration time is 360 minutes, anoxic time for 60 minutes), precipitation for 30 minutes, water outlet for 5 minutes, and idle for 5 minutes; automatic time control is...

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Abstract

The invention relates to a whole-process autotrophic denitrification method suitable for sewage with large COD / N fluctuations, and belongs to the technical field of high ammonia nitrogen wastewater treatment. The first step is the establishment of the CANON process system; the second step is to determine the operation mode of the CANON process under different COD / N conditions. The input of ammonia nitrogen wastewater is equipped with a stable CANON process autotrophic denitrification reactor obtained through the first step to determine the best operation mode of the CANON process under different COD / N conditions, and obtain the CANON process under different COD / N conditions run method. Using the CANON process of the invention to treat different COD / N waste water is highly efficient and stable. The optimization of the CANON autotrophic denitrification treatment scheme for different COD / N wastewater has good engineering significance, and can be widely used in decentralized wastewater denitrification treatment where the amount of sewage is not large but the fluctuation of COD / N is large.

Description

technical field [0001] The invention relates to a whole-process autotrophic denitrification method suitable for sewage with large COD / N fluctuations, and belongs to the technical field of ammonia nitrogen wastewater treatment. [0002] technical background [0003] In recent years, with the rapid development of urbanization and industrialization in my country, the per capita water consumption has increased year by year. At the same time, a large amount of sewage and waste water has been simply treated or discharged into rivers and lakes without treatment, resulting in increasingly serious water pollution. Among them, various nitrogen-containing compounds in different forms have caused serious water nitrogen pollution and water eutrophication after entering the water body, which has become an important factor affecting the water resource environment and restricting the sustainable development of the economy and society. my country's urban sewage treatment plant pollutant disch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/302C02F3/307C02F2305/06
Inventor 王亚宜张姚韩海成王晓东
Owner TONGJI UNIV