High-efficiency anti-blocking synchronous nitration and denitrification hierarchy biological aerated filter

A biological aerated filter and synchronous nitrification technology, which is applied in the direction of aerobic and anaerobic treatment, can solve the problems of difficult to realize synchronous nitrification and denitrification, small specific surface area of ​​filler, low reaction efficiency, etc., to achieve the benefit of oxygen transmission , improve the mass transfer performance, and the effect of uniform water discharge

Inactive Publication Date: 2014-02-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of small specific surface area, small biomass attachment, low reaction efficiency, easy clogging and difficulty in realizing synchronous nit

Method used

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  • High-efficiency anti-blocking synchronous nitration and denitrification hierarchy biological aerated filter
  • High-efficiency anti-blocking synchronous nitration and denitrification hierarchy biological aerated filter
  • High-efficiency anti-blocking synchronous nitration and denitrification hierarchy biological aerated filter

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specific Embodiment approach 1

[0029] Specific implementation mode one: combine Figure 1-7 Describe this embodiment, a high-efficiency anti-clogging synchronous nitrification and denitrification layered biological aerated filter, the overall structural space of the biological aerated filter is arranged in partitions: a mixed area for water distribution and denitrification, and a biological filter concurrently Oxygen reaction zone, aerobic zone, drainage zone; the mixed zone for water distribution and denitrification includes water inlet pipeline 9, water distribution zone 4, return pipeline 13 and premixing zone 8, and the aerobic zone 5 is arranged with Aeration pipeline 7 and traditional particle packing 18; said aerobic area 2 is arranged with aeration pipeline 3 and flexible fiber ball packing 17;

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the nitrogen-containing sewage enters the biological aerated filter 1 through the water inlet pipeline 9 through the pump 16, and the backflow water of the return pipeline 13 is in the premixing zone 8 mix. Other steps and parameters are the same as those in Embodiment 1.

[0031] In this embodiment, according to the total nitrogen concentration and removal efficiency, the reflux ratio is adjusted to effectively control the concentration of carbon sources entering the facultative oxygen zone 5, and provide electron acceptors for denitrification and denitrification for the denitrifying bacteria in the facultative oxygen zone 5.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the biological aerated filter adopts layered aeration, and the aeration pipeline 7 arranged in the aerobic zone 5 has holes on both sides. The aeration pipeline 3 arranged in the aerobic zone 2 has holes on both sides. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0033] In this embodiment, the amount of dissolved oxygen is controlled by a valve to obtain different amounts of dissolved oxygen between facultative and aerobic, forming a facultative and aerobic environment, and realizing synchronous nitrification and denitrification. The aeration pipeline 7 inflates the aerobic zone 5, the air-water ratio is (2:1)-(3:1), and the dissolved oxygen in the aerobic zone 5d is controlled to be 0.1-0.3 mg / L; the aeration pipeline 3 supplies The aerobic zone 2 is inflated, the air-water ratio is (8:1)-(12:1), and the dissolved oxygen in the aerobic zone 2d is c...

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Abstract

The invention discloses a high-efficiency anti-blocking synchronous nitration and denitrification hierarchy biological aerated filter, and relates to a biological aerated filter, and the filter is used for solving the problems that the conventional filler is small in specific surface area, small in biomass adhesion, low in reaction efficiency, easy to block, and less in possibility of achieving synchronous nitration and denitrification through a single device. The biological aerated filter comprises a water supply and distribution and denitrification mixing area, a biological filter aerobic reaction area, an aerobic area and a water discharge area, wherein an aeration pipeline and a conventional grain filler are arranged in the biological filter aerobic reaction area; an aeration pipeline and a soft fiber spherical filler are arranged in the aerobic area. The filter adopts the soft fiber spherical filler, and has the advantages that the specific surface area is large, the dissolved oxygen mass transfer performance is good, the biologic adhesion property is good, the oxygen conveying is facilitated, the gas-water uniform distribution is improved, sewage blocking is prevented, adhesion growth of nitrobacteria is facilitated, the blocking is unlikely to happen, and the like, the biomass of the biological filter is effectively improved, the ammonium-nitrogen removal rate is 90%, the total nitrogen removal rate is 85%, that is, the total nitrogen removal rate is increased by 8.5% when being compared with that of the conventional biological aerated filter.

Description

technical field [0001] The invention relates to an aerated biological filter. Background technique [0002] Since 2006, my country's urban sewage discharge standard has been adjusted from the second-level standard or the first-level B standard to the first-level A standard, but statistics show that 95% of the urban sewage treatment plants in my country fail to meet the first-level A discharge standard. The main reason is that the total nitrogen in the effluent is difficult to reach the standard. In the face of increasingly stringent pollution control regulations, it is urgent to study the denitrification efficiency and improve the denitrification efficiency of sewage treatment equipment. [0003] Biological denitrification technology is an effective method in sewage treatment. It converts organic nitrogen in wastewater into ammonia nitrogen, converts ammonia nitrogen into nitrate nitrogen through nitrification, and then reduces nitrate nitrogen to nitrogen gas through denitr...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 王丽王丽杰何玉荣李浩然霍玉鑫
Owner HARBIN INST OF TECH
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