Combined denitrification filter tank

Abstract

The utility model discloses a combined denitrification filter tank and relates to the technical field of sewage treatment. Comprising a biological aerated filter and a denitrification filter, a bottom water outlet of the biological aerated filter is connected with a top water inlet of the denitrification filter, and each of the biological aerated filter and the denitrification filter comprises a water collecting layer, a water and gas distribution layer, a supporting layer, a filter material layer and a water layer. A water and gas distribution layer, a supporting layer, a filter material layer and a water layer are sequentially arranged above the water collection layer, and an aeration pipe is arranged in the water and gas distribution layer in the biological aerated filter. The sewage treatment device is reasonable in structural design, capable of efficiently treating sewage, good and stable in effluent quality, good in phosphorus and nitrogen removal effect and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a combined denitrification filter. Background Art

[0002] A biological aerated filter is a wastewater treatment technology that combines biological treatment with physical filtration. It adds an aeration system to a traditional biological filter. This aeration provides ample oxygen, promoting microbial growth and metabolism, thereby more effectively removing pollutants such as organic matter and ammonia nitrogen from wastewater. However, this biological filter is not effective in denitrifying wastewater. Therefore, this utility model designs a combined denitrification filter. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a combined denitrification filter tank with a reasonable structural design, which can efficiently treat sewage, has good and stable effluent quality, good phosphorus and nitrogen removal effects, and is highly practical.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a combined denitrification filter, including an aerated biological filter and a denitrification filter, the bottom water outlet of the aerated biological filter is connected to the top water inlet of the denitrification filter, the aerated biological filter and the denitrification filter both include a water collection layer, a water and air distribution layer, a supporting layer, a filter material layer, and a water layer, the water collection layer is sequentially provided with a water and air distribution layer, a supporting layer, a filter material layer, and a water layer, and an aeration pipe is provided in the water and air distribution layer in the aerated biological filter.

[0005] Preferably, the tops of the biological aeration filter and the denitrification filter are both provided with water inlets.

[0006] Preferably, the water and air distribution layer is provided with water and air distribution filter bricks.

[0007] Preferably, the biological aeration filter and the denitrification filter can be connected to a PLC controller.

[0008] Beneficial effects of the utility model: The combined denitrification filter of the utility model is a combination of an aerated biological filter and a denitrification filter, and its advantages are as follows:

[0009] 1. The filter tanks of this utility model all adopt new water and air distribution filter bricks, which are not easy to be blocked and distribute water and air evenly;

[0010] 2. The filter tank of the utility model occupies a small area and operates flexibly and reliably;

[0011] 3. The treatment efficiency of this utility model is high, and the effluent water quality is good and stable;

[0012] 4. PLC automatic control can be added according to user needs, which is simple to operate and easy to maintain;

[0013] 5. The utility model can remove phosphorus and nitrogen, has good treatment effect and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0015] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] Reference Figure 1 This specific embodiment adopts the following technical solution: a combined denitrification filter, including an aerated biological filter A and a denitrification filter B, the bottom water outlet of the aerated biological filter A is connected to the top water inlet of the denitrification filter B, the aerated biological filter A and the denitrification filter B both include a water collection layer 1, a water and air distribution layer 2, a supporting layer 3, a filter material layer 4, and a water layer 5, and the water collection layer 1 is sequentially provided with a water and air distribution layer 2, a supporting layer 3, a filter material layer 4, and a water layer 5, and an aeration pipe is provided in the water and air distribution layer 2 in the aerated biological filter A, and bubbles 6 generated during aeration pass from bottom to top through the supporting layer, the filter material layer, and the water layer.

[0018] It is worth noting that the tops of the biological aeration filter A and the denitrification filter B are both provided with water inlets 7 .

[0019] It is worth noting that the water and air distribution layer 2 is provided with water and air distribution filter bricks.

[0020] In addition, the biological aeration filter A and the denitrification filter B can be connected to a PLC controller.

[0021] The working principle of this utility model is as follows: sewage enters the biological aeration filter, where pollutants contained in the water are intercepted by the filter media layer and degraded and converted by the organisms attached to the filter media. Nitrifying bacteria in the tank nitrify the ammonia nitrogen in the sewage into nitrate nitrogen (nitrate or nitrite). The nitrate nitrogen-containing effluent from the biological aeration filter enters the denitrification filter. The denitrifying bacteria in the tank use organic matter in the influent as electron donors and nitrate nitrogen as electron acceptors to carry out electron transfer, ultimately converting the nitrate nitrogen into nitrogen and transferring it to the air, achieving the purpose of denitrification of the wastewater.

[0022] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A combined denitrification filter, characterized in that: The invention comprises an aerated biological filter (A) and a denitrification filter (B). The bottom water outlet of the aerated biological filter (A) is connected to the top water inlet of the denitrification filter (B). The aerated biological filter (A) and the denitrification filter (B) both comprise a water collection layer (1), a water and air distribution layer (2), a supporting layer (3), a filter material layer (4), and a water layer (5). The water collection layer (1) is provided with a water and air distribution layer (2), a supporting layer (3), a filter material layer (4), and a water layer (5) in sequence. An aeration pipe is provided in the water and air distribution layer (2) in the aerated biological filter (A).

2. A combined denitrification filter according to claim 1, characterized in that: The tops of the biological aeration filter (A) and the denitrification filter (B) are both provided with water inlets (7).

3. A combined denitrification filter according to claim 1, characterized in that: The water and air distribution layer (2) is provided with water and air distribution filter bricks.

4. A combined denitrification filter according to claim 1, characterized in that: The biological aeration filter (A) and the denitrification filter (B) are connected to a PLC controller.

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