Starting and efficient operating method of normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique

A fully autotrophic denitrification and high-efficiency operation technology, applied in the field of water environment restoration and regeneration, can solve the problem of low treatment load and achieve the effect of increasing the success rate of bio-attachment

Active Publication Date: 2014-02-26
BEIJING UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the current full-process autotrophic denitrification process is mainly used in high-temperature and high-ammonia-nitrogen fields

Method used

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  • Starting and efficient operating method of normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique
  • Starting and efficient operating method of normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique
  • Starting and efficient operating method of normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique

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Experimental program
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Embodiment 1

[0024] During the test, the temperature is always constant at 16-24°C, and the test device is a biofilter filled with volcanic rocks, such as figure 1 shown. The test device is made of plexiglass, with an inner diameter of 28cm, a height of 1.2m, a total volume of 74L, and an effective volume of 64L. The reactor adopts a cylindrical reactor with a ratio of diameter to depth of 1:3-1:8, filled with volcanic rock filter material with a particle size of 8-15mm, and the non-uniformity coefficient is less than 1.2, and inoculated with flocculent sludge from backwashing of CANON filter column. The column is filled with volcanic rock filler, the filling height is 1.1m, and the filling particle size is 7-9mm. An aeration ring is installed at the bottom of the reactor, and a sampling port is provided every 10 cm on the wall of the filter tank, and a peristaltic pump is used to feed water, and the direction of the water flow is upward, and a water outlet is provided at the uppermost en...

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Abstract

The invention relates to a starting and efficient operating method of a normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique, belonging to the field of aquatic environment restoration and regeneration. CANON filter column back flush sludge is inoculated to a reactor, and a biofilm formation stage, a variable substrate starting stage and an efficient operating stage are performed at normal temperature to achieve the level of treating 780-820 mg/L high-ammonia-nitrogen sewage within 150 days; and the average total nitrogen removal load is up to 3.03kg.m<-3>.d<-1>, which is many times higher than the Japanese Furukawa (0.83kg.m<-3>.d<-1>) and Spanish Vazquez-Padin (0.5kg.m<-3>.d<-1>).

Description

technical field [0001] The invention belongs to the field of water environment restoration and regeneration. Specifically, it relates to a method for the start-up and high-efficiency operation of various normal-temperature, high-ammonia-nitrogen sewage biofilm methods for full-scale autotrophic denitrification (CANON) processes. Background technique [0002] The whole autotrophic denitrification process means that under aerobic conditions, the aerobic ammonia oxidizing bacteria first 2 As the electron acceptor, take NH 4 + -N for the electron donor will be NH 4 + Oxidation to NO 2 - -N, while anammox bacteria use NO 2 - -N is an electron acceptor, the NH 4 + -N is directly oxidized to N 2 the process of. The process is a whole autotrophic denitrification process, which can treat only NH 4 + -N sewage, compared with the traditional denitrification process, does not require an external carbon source, can save a lot of energy consumption, and has a small sludge ou...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 李冬苏庆岭吴青梁瑜海曾辉平张杰
Owner BEIJING UNIV OF TECH
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