Efficient backwash method for biofilter

A biological filter and backwashing technology, applied in the direction of separation methods, chemical instruments and methods, cleaning methods and appliances, etc., can solve the problems of wasting water resources and electric energy, affecting the effect of biochemical treatment, increasing one-time investment, etc., and achieve saving Operating costs, reducing one-time investment, and improving the effect of biochemical treatment

Pending Publication Date: 2017-08-18
鞍钢集团工程技术有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

If there are too many suspended solids deposited on the filter material layer after each backwash, a large amount of backwash water can only be used for flushing, which not only wastes water resources and electric energy, but also washes the biofilm with a large amount of backwash water, which is likely

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  • Efficient backwash method for biofilter
  • Efficient backwash method for biofilter
  • Efficient backwash method for biofilter

Examples

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Example Embodiment

[0027] The specific embodiments of the present invention will be further described below in conjunction with the drawings:

[0028] In the method for high-efficiency backwashing of a biological filter according to the present invention, the biological filter 1 is a newly-built biological filter or an in-use biological filter; it includes the following steps:

[0029] 1) Such as figure 1 , figure 2 As shown, for the newly-built biological filter 1, an elongated backwash drain 4 is provided along the length direction on the wall of the water outlet side below the backwash weir 8 and above the filter layer 2, and an electric drainage device is installed; The electric drainage device is provided with a drainage baffle 6, which is close to the pool wall and covers the backwash drainage port 4. The drainage baffle 6 can be raised and lowered under the drive of the drainage driving device to realize backwash drainage. Closing or opening of mouth 4;

[0030] Such as image 3 , Figure 4 A...

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PUM

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Abstract

The invention relates to an efficient backwash method for a biofilter. The method includes: 1) a water outlet side wall, below a backwash effluent weir, of a newly constructed biofilter is provided with a long strip shaped backwash water outlet and provided with an electric water discharge device; and a water outlet side wall, below a backwash effluent weir, of a biofilter in use is provided with a rectangular or round backwash water outlet and provided with a manual water discharge device; 2) sequentially performing gas washing, gas-water washing and water washing during backwashing of the biofilter; 3) slowly descending a water discharging baffle after sewage discharging; 4) starting a backwashing motor to blow suspended solids to a suspended state; 5) starting a water inlet valve to flush sewage out of the backwash water outlet, and closing the backwash water outlet. The efficient backwash method for the biofilter has advantages that the suspended solids and aged biological membranes generated in the biofilter can be cleared and discharged outside the biofilter thoroughly on the premise that backwash water consumption is not increased; blockage and filter material caking in the biofilter can be reduced, shedding of the biological membranes due to excessive flushing of filter materials can be avoided, and accordingly biochemical treatment effects of the biofilter are improved.

Description

technical field [0001] The invention relates to the technical field of wastewater purification treatment, in particular to a high-efficiency backwashing method for a biological filter. Background technique [0002] The biofilter is usually backwashed by air washing, air washing, and water washing to remove the aging biofilm and suspended solids in the biofilter. When backwashing, a large amount of suspended solids flow out through the backwash weir with the backwash effluent. A clear water area is set above the filter material layer to prevent the filter material from being washed out of the pool during backwash. The water surface of the clear water area is lower than the backwash effluent weir; However, in actual operation, after backwashing, there is still sewage containing a large amount of suspended solids in the clean water area that cannot be discharged. Part of the sewage enters the subsequent treatment process with the effluent of the biofilter, and the other part is...

Claims

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Application Information

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IPC IPC(8): C02F3/00B01D24/46B08B3/00B08B5/00
CPCB01D24/4631C02F3/00B08B3/00B08B5/00C02F2303/14
Inventor 冯占立张新宇于丰浩王军强盖亚光马英鞠德强姜珊珊刘俊玲穆晓
Owner 鞍钢集团工程技术有限公司
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