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Method for quickly starting pre-denitrification biological aerated filter process

A biological aerated filter and pre-denitrification technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., to achieve the effect of reducing domestication time, reducing commissioning costs, and reducing domestication links

Inactive Publication Date: 2011-08-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing pre-denitrification biological filter process takes a long time to cultivate the denitrification bacteria group, resulting in too long start-up time; Method for rapid start-up of denitrification biological aerated filter process

Method used

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specific Embodiment approach 1

[0009] Specific embodiment one: the method for quick start of pre-denitrification biological aerated filter process in the present embodiment is completed according to the following steps: one, by 35%~of the pre-denitrification biological aerated filter system design water yield 45% (by volume) of sewage is passed into the pre-denitrification biological aerated filter, and the molar ratio of C:N in the anoxic denitrification biological filter is controlled to be not less than 4. The aeration of the biological aerated filter The air volume is supplied according to the full load operation of the pre-denitrification biological aerated filter, to (it is the filter material in the biological aerated filter and the anoxic denitrification biological filter, and no backflow is required during the above operation (This process needs 30-35 days); 2. Then reduce the aeration rate to 1 / 3rd of the gas volume during full-load operation, and open the backflow device at the same time, and retu...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that: In step 1, 40% (by volume) of the system design water volume is used to feed sewage into the pre-denitrification biological aerated filter tank. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, the molar ratio of C:N in the anoxic denitrification biological filter is controlled to be 5-10. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for quickly starting a pre-denitrification biological aerated filter process, belongs to the field of sewage treatment, and solves the problem that the conventional pre-denitrification biological aerated filter process consumes long time to culture pre-denitrification flora so as to result in over-long starting time. The method for quickly starting the pre-denitrification biological aerated filter process adopts the following mode: firstly, forming biofilm; secondly, emphasizing on culturing naturalized nitrobacterium; and finally culturing naturalized denitrified bacteria. Therefore, the acclimation link is saved, the acclimation time is shortened, and the debugging cost is reduced. The method can rapidly culture the denitrified bacteria in an anoxic denitrification biological aerated filter in the pre-denitrification biological aerated filter process and finish the debugging for putting into use as soon as possible. Due to the adoption of the method,the effluent of the pre-denitrification biological aerated filter process can be debugged to reach the standard in 120 to 140 days.

Description

technical field [0001] The invention belongs to the field of sewage; in particular, it relates to a method for quick start-up of a pre-denitrification aerated biological filter process. [0002] Background technique [0003] The pre-denitrification biological filter process occupies a small area, has high treatment effect and low operating cost, and is a promising sewage treatment process. However, it takes a long time to cultivate denitrifying bacteria (it usually takes more than half a year to cultivate denitrifying bacteria), which prolongs the start-up time. [0004] Contents of the invention [0005] The purpose of the present invention is to solve the problem of too long start-up time caused by the time-consuming cultivation of denitrifying bacteria in the existing pre-denitrification biological filter process; and to provide a method for rapid start-up of the pre-denitrification biological aerated filter process. [0006] Among the present invention, the method th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/12
CPCY02W10/10
Inventor 韩洪军胡宏博李雨霏马文成王冰徐春艳王伟
Owner HARBIN INST OF TECH
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