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Rotary flow aeration biological filter

A biological aerated filter and water flow technology are used in biological aerated filters, and lightweight materials are used as fillers. It can solve the problems of high pretreatment requirements, easy blockage of biological aerated filters, and large amount of backwashing water.

Inactive Publication Date: 2005-07-20
向连城
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Its main disadvantages are: high pretreatment requirements, otherwise the biological aerated filter will be easily blocked; the amount of backwash water is large, and large sedimentation tanks and clear water tanks are required before and after the biological aerated filter

Method used

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  • Rotary flow aeration biological filter

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Embodiment Construction

[0009] When the biological aerated filter normally treats sewage, open the valves 1 and 2, the sewage enters from the bottom valve 1, passes through the reaction and filtration of the filter material in the biological aerated filter, and the water is discharged from the upper valve 2. At this time, the valves 3 and 4 are closed. The air valve 7 opens the aeration. The submersible mixer 5 rotates at a slow speed to fully mix the incoming water with the sewage in the filter tank and distribute the water evenly.

[0010] When the filter water head increases and the water output decreases, the biological aerated filter stops the water intake and enters the flushing state. Close the valves 1, 2, 3, 4, 7; the submersible mixer 5 rotates rapidly, driving the water flow and the filter material to rotate, and the speed gradient G value generated by the stirring power in the water is 100-300s -1 In between, the stirring time is 10-20 minutes to make the biofilm on the filter material f...

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Abstract

The rotary flow aerating and biologically filtering tank is circular or squared, adopts light suspended stuffing and has mechanical stirrer installed to make water and the stuffing rotate around the center of the tank. The aerating and biologically filtering tank runs in upstream mode. During processing sewage, the stirrer rotates slowly to rotate the bottom water flow for the homogeneous mixing and distribution of inflowing water. During washing the aerating and biologically filtering tank, the stirrer rotates quickly to rotate water and filtering material, the collision among filtering grains and the shearing force of water flow make the biological film on the stuffing fall down, and clear water is led in for rinsing to complete the washing process.

Description

technical field [0001] The invention relates to the treatment of urban sewage, domestic sewage or similar industrial wastewater, in particular to the aerated biofilter in the biofilm method, especially the light material used as filler. Background technique [0002] Biological aerated filter (also known as biological filter) is a biofilm sewage treatment process, the basic form of which is the combination of biological contact oxidation process and water filtration process. The biological concentration of the biological aerated filter is high, and the treatment efficiency is high; the biological aerated filter has a filtering effect, and a good effluent quality can be obtained without setting up a sedimentation tank; the periodic operation of the biological aerated filter is realized by backwashing. [0003] Compared with other sewage treatment processes, the main characteristics of biological aerated filter are: low overall investment, small footprint; high quality of treat...

Claims

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Application Information

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IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 向连城
Owner 向连城
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