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Local air-water reversing upflow biological aerated filter and sewage treatment method thereof

An aerated biological filter, a local technology, is applied in the field of water treatment devices, which can solve the problems of uneven distribution of water flow resistance, uneven distribution of air and water, and unfavorable uniform film formation, so as to reduce the long generation time and improve the space. Utilization, easy disassembly and maintenance effect

Inactive Publication Date: 2012-07-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of uneven distribution of water flow resistance, obvious short flow and channel flow phenomena, uneven distribution of gas and water, partial areas in an anaerobic state, fast water flow speed in some areas, and scouring in the existing biological aerated filter tanks. Strong, not conducive to uniform film formation, not conducive to the problem of nitrification, and provide local gas-water reverse upflow biological aerated filter and its method of sewage treatment

Method used

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  • Local air-water reversing upflow biological aerated filter and sewage treatment method thereof
  • Local air-water reversing upflow biological aerated filter and sewage treatment method thereof
  • Local air-water reversing upflow biological aerated filter and sewage treatment method thereof

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specific Embodiment approach 1

[0016] Specific Embodiment 1: In this embodiment, a partial air-water reverse upward flow biological aerated filter includes a sump 1, a filter body 3, a filter head 5, a filter plate 6, water inlet and backwash nozzle 7, Bottom aeration pipe 8, aeration main pipe 9, mud discharge outlet 10, water outlet 11, backwash outlet 12, water inlet pipe 13 and cross 14; wherein the sump 1 is arranged on the top of the filter tank body 3, and the outlet The water inlet 11 and the backwash outlet 12 are respectively arranged on the left and right sides of the sump 1, the water inlet pipe 13 is arranged at the bottom of the filter pool body 3, and the water inlet and backwash water outlet 7 are arranged at the water inlet end of the water inlet pipe 13, and the bottom The aeration pipe 8 communicates with the aeration main pipe 9, the filter plate 6 is arranged on the upper part of the water inlet pipe 13, the filter head 5 is arranged on the filter plate 6, and the mud discharge port 10 i...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that: the needle-punched non-woven filter material has a length of 1-3 cm, a width of 1-3 cm, and a thickness of 0.2-0.8 cm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: 3 to 5 branch aeration pipes 4 are arranged along the height direction of the aeration main pipe 9 . Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a local air-water reversing upflow biological aerated filter and a sewage treatment method thereof, and relates to a water treatment device and a water treatment method. According to the biological aerated filter, a needle punched nonwoven filter material is taken as a packing, and a plurality of aeration branch pipes are arranged in the height direction of an aeration main pipe. The water treatment method comprises the following steps of: regulating the pH value of sewage to be treated to be 7.5-8, pumping into the filter, pumping air into the filter, ensuring that the hydraulic retention time is 1 to 2 hours, and directly discharging the obtained supernate. Small-flow aeration of which the aeration direction is opposite to upward water flow, the water flow is disturbed on the water flow section, air and water are uniformly distributed, a mass transfer effect is good, phenomena of short flow and channeling can be reduced, anaerobic areas in a system can be effectively eliminated, a membrane is formed uniformly, a problem of poor nitrification effect during operation of the traditional biological aerated filter is solved to a great extent, and the average ammonia nitrogen concentration of effluent is 8.63mg / L. The invention is used for treating wastewater.

Description

technical field [0001] The invention relates to a water treatment device and method. Background technique [0002] At present, most sewage treatment plants in my country use A 2 Biological treatment processes such as O and AO, but due to the defects of the process itself, are mainly manifested in: 1) the contradiction between the different sludge ages of nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria; 2) the impact of nitrifying bacteria and phosphorus accumulating bacteria on the substrate ( carbon source) competition contradiction; 3) the contradiction of relatively large sludge production; 4) some high ammonia nitrogen wastewater exceeds A 2 Secondary biological treatment systems such as O and AO cannot discharge up to the limit of nitrification capacity; 5) During the operation of the traditional biological aerated filter, the distribution of water flow resistance is uneven, the phenomenon of short flow and channel flow is obvious, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 李伟光杨力王勇宿程远
Owner HARBIN INST OF TECH
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