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Enlargement starting method of biofilter completely-autotrophic nitrogen removal technology

A whole process of autotrophic denitrification and biological filter technology, applied in the field of autotrophic denitrification of wastewater

Active Publication Date: 2013-07-31
BEIJING UNIV OF TECH
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Problems solved by technology

Therefore, how to quickly enrich the anammox bacteria and start the CANON process has become a major bottleneck restricting the application of the process

Method used

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Embodiment

[0021] The reactor of the present invention is made of a plexiglass column, with an inner diameter of 250mm and a total height of 1300mm. The bottom is provided with a 20mm river pebble supporting layer, in which a disc-type membrane aeration device is placed, and the total volume of the reaction zone is 40L. In this test, volcanic rock was selected as the filter material, with an average porosity of 80%, a particle size of 4.0-6.0 mm, and an apparent density of 1.60-1.80 kg / m 3 , Bulk density 0.7~0.9kg / m 3 . The filling height of the filter material is 900mm, the filling rate of the filler is 100%, and the initial effective volume is 21L. The reactor adopts the water inlet method of upward flow, the raw water and aeration enter from the bottom, and the effluent flows out from the upper outlet. During the test, the temperature of the reactor was controlled by the water bath heating of the sleeve wrapped outside the reaction zone, and the aeration rate was controlled by the r...

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Abstract

An enlargement starting method of a biofilter completely-autotrophic nitrogen removal technology belongs to the wastewater autotrophic nitrogen removal field. The method comprises the following steps: inoculating a small amount of the manure filter material of an autotrophic nitrogen removal technology biofilter, adopting enlargement starting, carrying out anaerobic culture to enrich anaerobic ammonia oxidizing bacteria, limiting the oxygen, culturing the aerobic ammonia oxidizing bacteria to make the aerobic ammonia oxidizing bacteria adapted to the aerobic environment, and carrying out aerobic aeration to realize the starting of the completely-autotrophic nitrogen removal technology. The aerobic ammonia oxidizing bacteria and anaerobic ammonia oxidizing bacteria are originally contained in completely-autotrophic technology sludge, so the oxygen-limited culture of the aerobic ammonia oxidizing bacteria is carried out without inoculating the aerobic ammonia oxidizing bacteria, thereby the adaptation phase of foreign ammonia oxidizing bacteria is omitted. After the ending of the anaerobic culture phase, only a short oxygen limiting time is needed to rapidly start a completely autotrophic reactor. Problems comprising difficult starting, long time and the like of a completely-autotrophic nitrogen removal reactor are solved through enlargement starting method of the biofilter completely-autotrophic nitrogen removal technology is provided in the invention.

Description

technical field [0001] The invention belongs to the field of autotrophic denitrification of waste water. In particular, the invention relates to a start-up method of a whole-process autotrophic denitrification process of a biological filter. Background technique [0002] At the end of the last century, large amounts of NH were found in wastewater treatment systems with high nitrogen loading and low dissolved oxygen 4 + -N is not removed by traditional nitrification and denitrification. Combined with the discovery of Anammox denitrification pathway, it is speculated that there may be coexistence of ammonia oxidizing bacteria and Anammox bacteria in the treatment structure. [0003] In 1999, Third et al. first proposed the CANON (completely autotrophic nitrogen removal over nitrite) process, that is, a single-stage whole-process biofilm autotrophic ammonia oxidation process. In this new denitrification process, ammonia oxidizing bacteria and Anammox bacteria coexist in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李冬梁瑜海畅晓燕张肖静崔少明杨卓张翠丹吴青苏庆岭范丹张玉龙周元正门绚杨胤何永平曾辉平张杰
Owner BEIJING UNIV OF TECH
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