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Tandem type two-stage three-segment aerating biological filter

An aerated biological filter, a series-type technology, is applied in the field of a series-type two-stage three-stage aerated biological filter, which can solve the problems of low contact efficiency between sewage and air, uneven wastewater treatment, secondary pollution, etc. Conducive to biofilm attachment, avoiding direct impact and improving removal efficiency

Inactive Publication Date: 2008-12-24
CHINA NAT OFFSHORE OIL CORP +1
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AI Technical Summary

Problems solved by technology

Due to direct aeration and oxygenation at the bottom of the packing layer, the filter material layer and its prone to occur during the operation of the biological aerated filter. Due to the blockage of the aeration pipe by the filter material, the contact efficiency of microorganisms attached to the surface of the filter material, sewage and air is low. , resulting in the occurrence of anoxic environment, resulting in uneven wastewater treatment, partial denitrification and partial nitrification, resulting in NO in the final effluent 2 - content increases, secondary pollution occurs

Method used

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  • Tandem type two-stage three-segment aerating biological filter

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Embodiment 1

[0019] In a factory, a series-type two-stage three-stage biological aerated filter pilot plant was established, and the material was made of plexiglass. The inner diameter of the biological aerated filter is 50cm, the thickness is 5cm, and the overall height is 250cm; the height of the bottom support layer is 50cm, which is composed of homogeneous quartz sand with a particle size of 20cm; the height of the packing layer in the biological aerated filter I is 100cm, and the The filler layer in Pool II is 150cm high, and it is composed of porous and homogeneous volcanic rock particles with a particle size of 3-5cm. The bulk density of the volcanic rock particles is 750-780Kg / m 3 , The porosity is about 82%. In the aeration filter I, an aeration pipe with a diameter of 10 cm and 5 aeration holes with an inner diameter of 5 cm is set at a place 60 cm high from the supporting layer, and a stainless steel screen is built in it to prevent the filler from entering. In the aeration fil...

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Abstract

The invention relates to a series-type two-stage three-section aeration biofilter comprising an influent distributor pipe, an air input distributor pipe, an effluent pipe and filter materials in the cell body of the filter characerized in that the filter mainbody consists of a waste water pool, filters I, II and a back washing system, wherein a supporting layer 1 is arranged in the filter I as the bottom, a bio-filler layer 2 is arranged on the supporting layer 1, an aerated conduit 4 is arranged in the bio-filler layer 2; another supporting layer 1 is arranged in the filter II as the bottom, a bio-filler layer 3 is arranged on the supporting layer 1, an aerated conduit 5 is arranged in the bio-filler layer 3, and is branched to three section aerated conduits 6, 7, 8; the back washing system consists of an air compressor, a back washing drainage pipe 9 and a drainage pipe 10 after the waste water treatment. The device of the invention can improve the removal performance of the COD and ammonia nitrogen of the system using a lower running cost.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment. The invention relates to a serial two-stage three-stage aerated biological filter, which improves the COD and biological denitrification efficiency of the aerated biological filter by improving the structural form of the traditional aerated biological filter. Background technique [0002] At present, water environment pollution and water resource shortage have become the main problems restricting the further sustainable development of my country's national economy, which has aroused great concern from all walks of life. Biological aerated filter is a new sewage biological treatment technology with the characteristics of simplicity, high efficiency and low consumption. It is one of the research hotspots in the field of sewage biological treatment in recent years. This technology has the characteristics of stable effluent quality, high treatment efficiency, large...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 谢陈鑫滕厚开陈军赵慧
Owner CHINA NAT OFFSHORE OIL CORP
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