CANON (completely autotrophic nitrogenremoval over nitrite) for sewage with large fluctuating degree of COD/N (chemical oxygen demand/nitrogen)

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 problems such as increased treatment costs, high operating costs, and complex maintenance and management

Active Publication Date: 2018-05-04
TONGJI UNIV
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  • Abstract
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  • Application Information

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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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  • CANON (completely autotrophic nitrogenremoval over nitrite) for sewage with large fluctuating degree of COD/N (chemical oxygen demand/nitrogen)
  • CANON (completely autotrophic nitrogenremoval over nitrite) for sewage with large fluctuating degree of COD/N (chemical oxygen demand/nitrogen)
  • CANON (completely autotrophic nitrogenremoval over nitrite) for sewage with large fluctuating degree of COD/N (chemical oxygen demand/nitrogen)

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Embodiment Construction

[0026] The first step is to establish CANON process system

[0027] 1. Inoculate the 2L CANON sludge cultivated in our laboratory, dilute to 2.5L with water, and put it into the 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 is 4105mgSS / L.

[0028] The method of cultivating CANON sludge in this laboratory is: inoculate small particle size anaerobic ammonia oxidation granular sludge and short-cut nitrification floc sludge into SBR reactor, adjust the ammonia nitrogen concentration of influent to 300±20mg / L, and carry out exposure Air anaerobic operation.

[0029] 2. Determine the operation mode of the SBR reactor, set each cycle as: 20min water intake, 420min reaction (each aeration time 360min, hypoxia time 60min), precipitation 30min, water output 5min, idle 5min; adopt automatic time control Switch control, 3 cycles per day, each cycle is 8 hours; use water bath heating device and per...

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Abstract

The invention relates to a CANON (completely autotrophic nitrogenremoval over nitrite) method for sewage with large fluctuating degree of COD/N (chemical oxygen demand/nitrogen), and belongs to the technical field of treatment of wastewater with high content of ammonia and nitrogen. The CANON method comprises the following steps of 1, establishing a CANON process system; 2, determining the CANON process running types under the condition of different CON/N; under different running conditions, inputting the ammonia and nitrogen wastewater of which the COD/N is 0.28 to 1.07 and the ammonia and nitrogen concentration is 600+/-50mg/L into a stable CANON process autotrophic nitrogenremoval reactor which is established in step 1, and determining the optimum running type of the CANON process undercondition of different COD/N, so as to obtain the CANON process running method under the condition of different COD/N. The wastewater with different CON/N can be efficiently and stably treated by theCANON process. The CANON method has the advantages that the better engineering meaning is realized for the optimizing of the CANON autotrophic nitrogenremoval plan for wastewater with different CON/N; the CANON method can be widely applied to the dispersed type sewage nitrogen removal with small amount of sewage and large fluctuating degree of COD/N.

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. technical background [0002] 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, large amounts of sewage and wastewater are simply treated or discharged into rivers and lakes without treatment, causing water pollution to worsen. Among them, various nitrogen-containing compounds in different forms enter the water body and cause serious water body nitrogen pollution and water body eutrophication problems, which have become an important factor affecting the water resources environment and restricting the sustainable development of economy and society. The pollutant discharge standards for urban sewage treatment plants implemented in my c...

Claims

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Application Information

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Patent Type & Authority Applications(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
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