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Efficient autotrophic denitrification method of bacterial filter

A biological filter, autotrophic denitrification technology, applied in the direction of aerobic and anaerobic process treatment, can solve the problem of small denitrification load, and achieve the effect of high treatment load, efficient autotrophic denitrification, and strong retention capacity

Active Publication Date: 2014-02-19
BEIJING UNIV OF TECH
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Problems solved by technology

At present, there are bottlenecks such as low denitrification load in the whole process of biofilter autotrophic denitrification process, so how to improve the treatment efficiency of the reactor has practical significance

Method used

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  • Efficient autotrophic denitrification method of bacterial filter
  • Efficient autotrophic denitrification method of bacterial filter
  • Efficient autotrophic denitrification method of bacterial filter

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Embodiment

[0014] The reactor of the present invention is made of plexiglass column, with an inner diameter of 250mm, a filling height of 1300mm, a 20mm river pebble support layer at the bottom, a disc membrane aeration device placed therein, and a total volume of the reaction zone of 40L. In this test, volcanic rock was selected as the filter material, with an average porosity of 80%, a particle size of 4.0-6.0mm, and an apparent density of 1.60-1.80kg / 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 rotameter. An online pH and DO da...

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Abstract

An efficient autotrophic denitrification method of a bacterial filter belongs to the wastewater autotrophic nitrogen removal field. The efficient autotrophic denitrification method comprises the steps of: inoculating a CANON process biological membrane and successfully activating the autotrophic nitrogen removal bacterial filter in an anaerobic-first and aerobiotic-later activation manner; and after the reactor is successfully activated, increasing the gas-water ratio of the reactor, namely the ratio of aeration rate to water inlet flow, by controlling the water inlet flow and the aeration rate, thereby continuously improving the removal load of the reactor. When the ammonia nitrogen removal rate of the reactor is greater than 99%, the water inlet flow is increased; when the concentration of nitrite nitrogen in yielding water is less than 30 mg / L, the aeration rate is increased; and finally, the total nitrogen removal rate of the reactor reaches 80-89% and the total nitrogen removal load reaches 1.0-3.11 kgN.m<-3>.d<-1>, and therefore, efficient autotrophic nitrogen removal is realized. The efficient autotrophic denitrification method provided by the invention solves the problem of low treatment load of the full autotrophic nitrogen removal reactor; and an efficient implementing method is provided for full autotrophic nitrogen removal of the bacterial filter.

Description

technical field [0001] The invention belongs to the field of autotrophic denitrification of waste water. Specifically, the invention relates to an efficient operation method of a whole-process autotrophic denitrification process of a biological filter. Background technique [0002] In recent years, with the rapid growth of our country's economy, the process of industrialization and urbanization has continued to advance, and water pollution has become increasingly serious, causing water quality water shortages and original resource water shortages to overlap each other, and more and more affect people's normal production. and life. Among them, nitrogen pollution is a major hazard. However, the traditional nitrification / denitrification biological denitrification process not only has congenital deficiencies such as long process, high oxygen supply, additional carbon source, and high sludge production. Therefore, scholars from various countries have carried out research on va...

Claims

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Application Information

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Patent Type & Authority Patents(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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