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A kind of biofilter process and filter

A biological filter, filter technology, applied in biological treatment devices, biological water/sewage treatment, chemical instruments and methods, etc. Easy to block or harden and other problems, to achieve the effect of reducing the difficulty of backwashing, reducing the amount of backwashing water, and large porosity

Active Publication Date: 2016-10-26
BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a biofilter process and filter to solve the problem of difficulty in backwashing of existing biofilters, easy blockage or hardening, high backwashing frequency, large backwashing water consumption and power consumption, and SS water output. Many technical problems

Method used

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  • A kind of biofilter process and filter
  • A kind of biofilter process and filter

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Embodiment Construction

[0018] Structure and technology of the present invention are described as follows:

[0019] A biofilter process, the biofilter filter material is packed in a hoistable box, and the filter bed is vertically divided into several layers by using the filter material box, that is, the upper layer filter material box 1, the middle layer filter material box 10 and the lower layer Filter box 9, see figure 2 . see figure 1 , shows a filter tank composed of six filter tank units, and each filter tank unit can also divide the filter bed plane into several grids on the plane according to actual engineering needs. Place large particle size filter material in the upper filter material box 1, place small particle size filter material in the middle filter material box 10, and place the smallest particle size filter material in the lower layer filter material box 9. Adopting the downward flow operation mode, the particle size of the filter material gradually decreases along the direction o...

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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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Patent Type & Authority Patents(China)
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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