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A backwashing device and method for a light-weight filter material biological aerated filter

A technology of aerated biological filter and lightweight filter material, which is applied in the field of backwashing device, can solve the problems of large effluent treatment volume, high cost, mixed layers of filter materials, etc., so as to ensure the treatment effect, reduce the treatment cost, and reduce the water consumption. amount of effect

Inactive Publication Date: 2011-12-14
深水海纳水务集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems exist in the conventional backwashing method: ① During the backwashing process, it is easy to cause mixed layers of filter material, the upper part of the filter material layer mainly adheres to nitrifying bacteria, and the filter material layer mainly adheres to heterotrophic bacteria. The filter material layer moves up, so that the sewage treatment effect of the filter at the initial stage of operation after backwashing is not good, especially for the removal of ammonia nitrogen; The amount of backwash effluent is large and the cost is high; ③The filter layer is easy to agglomerate during operation, and the conventional backwash method cannot effectively wash away these agglomerated filter materials, resulting in a decline in the subsequent treatment effect of the filter

Method used

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  • A backwashing device and method for a light-weight filter material biological aerated filter
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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Figure 1 to Figure 2 The reference numerals in the figure are: air pump 1; aeration valve 2; second pressure sensor 3; first pressure sensor 4; process water inlet valve 5; backwash drainage valve 6; water distribution layer 7; backwash water pump 9; process water outlet valve 10; partial backwash perforated pipe 11; partial backwash hole 111; partial backwash start valve 12; pool body 100; light filter material layer 101.

[0051] Such as Figure 1 to Figure 2 As shown, a backwashing device of a light filter material biological aerated filter includes a tank body 100, and its sewage flow direction adopts an upflow type, and the tank body 100 is provided with a water distribution layer 7, a light filter material layer 101, Process water inlet valve 5, process water outlet valve 10 and backwash drain valve 6, the process water inlet va...

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Abstract

The invention relates to the field of sewage processing, and relates to a backwashing apparatus and a backwashing method for an aeration biofilter with a lightweight filter material. The backwashing apparatus for the aeration biofilter with the lightweight filter material comprises a tank, a lightweight filter material layer, a technical water inlet valve, a technical water outlet valve, and a backwashing water discharging valve. An aeration pipeline and a local backwashing pipeline are connected to the bottom of the tank. The aeration pipeline comprises an aeration device. The local backwashing pipeline comprises a local backwashing pump and a local backwashing perforated pipe connected to the local backwashing pump. A local backwashing starting valve is arranged on the local backwashingperforated pipe. The local backwashing perforated pipe is positioned in the lightweight filter material layer. The invention also provides a backwashing method for the aeration biofilter with the lightweight filter material. The apparatus and the method provided by the invention are advantaged in that: lightweight filter material mixing caused by the backwashing process is reduced, water consumption in the backwashing process is reduced, and agglomerated lightweight filter material can be flushed.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a backwashing device and method for a light filter material aerated biological filter in sewage treatment. Background technique [0002] Biological Aerated Filter (BAF for short) is a new sewage treatment process developed in the late 1980s on the basis of ordinary biological filters and drawing on the water supply filter process. The biggest feature of the biological aerated filter is that it integrates biological oxidation and interception of suspended solids, saves the subsequent secondary sedimentation tank, and simplifies the treatment process on the premise of ensuring the treatment effect. Lightweight filter material aerated biological filter is a new type of BAF technology developed in recent years. Compared with the heavy filter material BAF process, it has the following advantages: ①Using light organic filter material, it is not easy to wear and lose, and the supplementary cost is lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 董文艺王宏杰李继刘杰
Owner 深水海纳水务集团股份有限公司
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