New biological filter tank process and filter tank

A biofilter and filter technology, applied in the direction of biological treatment devices, biological water/sewage treatment, chemical instruments and methods, etc., can solve the problem of high water consumption and power consumption for backwashing, difficulty in backwashing of biofilters, Problems such as high frequency of backwashing can achieve the effect of reducing the difficulty of backwashing, reducing the amount of backwashing water, and shortening the process flow

Active Publication Date: 2015-04-08
BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a novel biofilter process and filter to solve the problem of difficult backwashing of existing biofilters, easy c

Method used

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  • New biological filter tank process and filter tank
  • New biological filter tank process and filter tank

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Example Embodiment

[0018] The structure and process of the present invention are described as follows:

[0019] A type of biological filter process. The filter material of the biological filter is filled in a hoistable box, and the filter bed is vertically divided into several layers by the filter box, namely the upper filter box 1, the middle filter box 10 and Lower filter box 9, see figure 2 . See figure 1 , Shows a filter tank composed of six filter tank units. Each filter tank unit can also be divided into several grids on the plane according to actual engineering needs. A large particle size filter is placed in the upper filter box 1, a small particle size filter is placed in the middle filter box 10, and the smallest particle size filter is placed in the lower filter box 9. The downward flow operation mode is adopted, and the particle size of the filter material is gradually reduced along the direction of the filtered water flow, which can give full play to the advantages of large particle...

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Abstract

The invention discloses a new biological filter tank process and a new biological filter tank, the new biological filter tank includes a filter tank, a backwash water pipe located at the bottom side part of the filter tank, a water intake canal located above the filter tank, an effluent weir located below the filter tank, and a filter material; all the filter material is separately put into a plurality of liftable filter material boxes, the filter material boxes vertically separate a filter bed into a plurality of layers, the plane of the filter bed is also can be divided into a plurality of cases and one overall case according to the need of practical engineering, a water swelling material is arranged between the periphery of the filter material boxes and the filter tank, a compressible and stretchable rigid frame is arranged in the swelling material; the filter material size gradually decreases along the filtering water flow direction, and enough spare height is left above the filter material in the filter material boxes. The new biological filter tank can solve many technical problems of high backwash difficulty, easy blockage or hardening, high backwash frequency, high backwash water consumption, f large power consumption, high effluent SS (suspended solids) and the like of filter tanks in the prior art.

Description

technical field [0001] The invention relates to the technical field of urban domestic sewage treatment. Background technique [0002] There are more than 3,000 urban sewage plants in my country, with a total treatment capacity of 146 million m 3 / d, the actual processing volume is about 120 million m 3 / d. Generally, the secondary activated sludge method is used to treat urban domestic sewage, and the main process is A 2 O, oxidation ditch, SBR. Pollutants in urban domestic sewage mainly include organic matter (COD Cr 、BOD 5 Indicated), N pollutants (in NH 3 -N, TN representation), P pollutants, SS, etc.; organic matter in sewage, NH 3 -N is relatively easy to remove. After secondary treatment, organic matter and NH 3 -N can meet the requirements of Class IV water bodies on the surface; after secondary treatment of P pollutants and SS, and then advanced treatment (dosing flocculation + filtration), the effluent TP can meet the requirements of Class IV water bodies on...

Claims

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Application Information

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IPC IPC(8): C02F3/00
CPCC02F3/00C02F2203/006
Inventor 邵辉煌李艺郭玉梅吴毅晖文惠顾升波刘雷斌
Owner BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST
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