CN202519126U - Square aerated biofilter reactor integrating denitrification dephosphorization functions - Google Patents

Abstract

The utility model belongs to the field of sewage treatment, and relates to an integrated nitrogen and phosphorus removal square-shaped biological aerated filter reactor, which can be produced by equipment, and can be used for factories and enterprises with a small amount of sewage, as well as for the treatment of urban sewage . The reactor includes a regulating tank (1), which is connected with the vertical sedimentation tank (5) through the sewage metering pump (2), and is installed on the pipe section connecting the sewage metering pump (2) and the vertical sedimentation tank (5). A tubular static mixer (4), a sludge discharge pipe (19) connected to the bottom of the vertical sedimentation tank (5), the overflow from the upper part of the vertical sedimentation tank enters the square biological aerated filter (6), and the square aeration Aeration pan (12), aeration pipe (11), backwash water inlet pipe (15), water outlet pipe (9) are installed at the bottom of biological filter (6), and air compressor (10) is connected with aeration pipe (11) , the backwash water pump (14) is connected to the backwash water inlet pipe (15), the vertical sedimentation tank (5) is placed inside the square biological aerated filter (6), and the inner packing of the square biological aerated filter (6) It is a calcium carbonate type biological filter material. The utility model has simple structure and compact arrangement, and achieves the purpose of sewage purification through chemical precipitation, phosphorus removal, physical interception and biological oxidation treatment of sewage.

Description

An integrated square-shaped biological aerated filter reactor for nitrogen and phosphorus removal

technical field

The invention relates to an integrated nitrogen and phosphorus removal square type aerated biological filter tank reactor, which can be used as a treatment device for urban waste water. the

Background technique

The removal of nitrogen and phosphorus in sewage has attracted widespread attention, and the research on nitrogen and phosphorus removal is of great significance to the protection of water environment. At present, the nitrogen and phosphorus removal technologies of sewage treatment plants in my country generally have the disadvantages of high energy consumption, low efficiency and unstable operation. In view of this situation, research is suitable for China's national conditions and cost-effective denitrification and phosphorus removal processes and methods, especially the development of the least COD oxidation, the lowest _CO2 release, the least excess sludge production, phosphorus recovery and treatment water reuse The goal of sustainable wastewater treatment technology becomes imperative.

Biological aerated filter is a new type of sewage treatment technology developed in Europe and the United States in the late 1980s. It has the characteristics of high treatment efficiency, small footprint, low infrastructure and operating costs, convenient management, and strong shock load resistance. It has a good application prospect in the removal of organic matter in sewage, nitrification and denitrification, denitrification and denitrification. the

The content of phosphorus nutrients in sewage increases, and after sewage treatment is discharged into natural water bodies, it still contains a large amount of phosphorus, which is the main cause of eutrophication. According to the current research, due to the lack of alternating anaerobic and aerobic conditions necessary for biological phosphorus removal, it is generally believed that under normal operating conditions, single-stage biological aerated filters only rely on biological assimilation and physical filtration for phosphorus removal efficiency. Around 20%, up to 35%. The phosphorus removal efficiency of single-stage BAF has always been a technical problem that plagues its engineering application. This patent organically combines the chemical precipitation and the biological aerated filter into an integrated nitrogen and phosphorus removal reactor, which effectively improves the nitrogen and phosphorus removal effect of the biological aerated filter. the

Contents of the invention

The purpose of the utility model is to solve the problem of low phosphorus removal efficiency in the biological aerated filter, and provides an integrated square-shaped biological aerated filter reactor for nitrogen and phosphorus removal. The reactor includes a regulating tank (1), which is connected to the vertical sedimentation tank (5) through the sewage metering pump (2), and pipes are installed on the pipe section connecting the sewage metering pump (2) and the vertical sedimentation tank (5). type static mixer (4), the bottom of the vertical sedimentation tank (5) is connected with a mud discharge pipe (19), and the overflow of the upper part of the vertical sedimentation tank enters the square biological aerated filter (6), and the square biological aerated Aeration pan (12), aeration pipe (11), backwash water inlet pipe (15), water outlet pipe (9) are installed at the bottom of filter tank (6), and air compressor (10) is connected with aeration pipe (11), The backwash water pump (14) is connected to the backwash water inlet pipe (15), the vertical sedimentation tank (5) is placed inside the square biological aerated filter (6), and the inner filler of the square biological aerated filter (6) is Calcium carbonate type biological filter material. the

In order to solve the above problems, the utility model includes a coagulation device, a vertical sedimentation tank and a square biological aerated filter. The coagulation device adopts a tubular static mixer, which is installed on the raw water inlet pipe for the addition of coagulant. The upper part of the vertical sedimentation tank is a sedimentation area, the lower part is a sludge area, and the buffer zone is between the two areas. Connected with mud pipe. The upper effluent of the vertical sedimentation tank enters the square biological aerated filter through the overflow around it. The filter includes a supporting layer, a filling area, an air distribution and water distribution area and an aeration device. The aeration device is placed in the air distribution and water distribution area, and the air distribution and water distribution area is connected with an aeration pan, a water outlet pipe, and a backwash water inlet pipe. the

The coagulation device is a tubular static mixer with simple structure, small size, no need to occupy special space, easy installation, low investment, long service life, high mixing efficiency, and achieves the purpose of instant mixing and energy saving. the

The influent of the sedimentation part is pressurized by the sewage pump and passed through the mixed liquid of the coagulation device. After passing through the sedimentation part, the SS content in the raw water is greatly reduced, providing the best influent water quality parameters for the subsequent square biological aerated filter, and removing Remove most of the phosphorus from the water. the

The biofilter has a filter area and a water outlet area. The filter area has a built-in calcium carbonate type biological filter material. The lower supporting layer is pebbles. The bottom is connected to the water outlet area through a porous supporting plate. The overflow around the upper part of the sedimentation tank enters the filter tank. In order to aerate evenly, an aeration plate is installed in the water outlet area, which is connected to the air compressor through the aeration pipe. The water outlet area at the bottom is used as the air distribution area during aeration, and also as the water distribution area during backwashing. The backwashing pipe is pressurized by the backwashing water pump and connected to the backwashing water. the

The outer wall of the vertical sedimentation tank is square, the outer wall of the biological aerated filter is square, and the outer wall of the vertical sedimentation tank is used as the inner wall of the filter, which is not connected to each other. The operation of the two pools does not interfere with each other, and the operation is stable. the

The utility model has a compact structure, and the modular structure is convenient for later reconstruction and expansion, as well as equipment production, and can be used in factories and enterprises with a small amount of sewage. Through chemical precipitation, phosphorus removal, physical interception, and biological oxidation treatment of sewage, the purpose of sewage purification is achieved, which helps to protect the environment and save resources. the

Description of drawings

Fig. 1 is a schematic diagram of an integrated square biological aerated filter reactor for denitrification and dephosphorization of the present invention. the

Fig. 2 is a sectional view of A-A in Fig. 1 . the

In the figure: 1 regulating tank, 2 sewage metering pump, 3 sewage pipe, 4 pipe static mixer, 5 vertical sedimentation tank, 6 square biological aerated filter, 7 filler, 8 supporting layer, 9 outlet pipe, 10 air compressor, 11 aeration pipe, 12 aeration plate, 13 water tank, 14 backwash water pump, 15 backwash water pipe, 16 mud discharge pipe, 17 mixing tank, 18 metering pump, 19 dosing pipe, 20 backwash out water pipe. the

Detailed ways

Accompanying drawing is a kind of concrete embodiment of the present utility model, and this embodiment comprises the adjusting pool 1 of collecting sewage, adjusting pool 1 enters vertical settling tank 5 through sewage metering pump 2 through sewage pipe 3, the mixing tank of preparation coagulant 17. The metering pump 18 for adding the coagulant is connected to the tubular static mixer 4. In the tubular static mixer, the coagulant and the sewage are fully mixed and then enter the vertical sedimentation tank 5 through the sewage pipe 3. The bottom of the vertical sedimentation tank is connected with a mud discharge pipe 16, and the water treated by the vertical sedimentation tank 5 enters the square biological aerated filter 6 through overflow, and the air distribution and water distribution area at the bottom of the square aeration tank is equipped with aeration The disc 12, the aeration disc is connected with the air compressor 10 through the aeration pipe 11, and the backwash pipe 15 is connected with the backwash pump 14, and the backwash outlet pipe 20 is connected to the upper part of the aeration tank. the

The sewage is adjusted in the regulating tank 1 to adjust the water volume and water quality, and enters the vertical sedimentation tank 5 through the sewage metering pump 2 and the sewage pipe 3. The sewage pipe is equipped with a tubular static mixer 4, and the coagulant is pressurized into the tubular static mixer through the 18 metering pump. In the static mixer, the coagulant and the sewage are fully mixed and then pass through the 3 sewage pipe vertical sedimentation tank 5 , for preliminary sedimentation, the bottom of the vertical sedimentation tank is connected with a sludge discharge pipe 16, and the sludge after sedimentation is discharged intermittently in a certain period of time, and the sludge is transported away by car after simple treatment, and the sludge treated by the vertical sedimentation tank 5 The water enters the square biological aerated filter 6 through the overflow, and is ventilated into the aeration tank through the air compressor 10 to provide sufficient oxygen for the microorganisms. When the predetermined head loss is reached, the filter is backwashed. The compressor 10 performs air washing, then turns on the backwash water pump 14 to pressurize the filter tank for air-water combined washing, then closes the air compressor 10, and uses the backwash water pump 14 to pressurize the filter tank to wash the filter tank with water, and the backwash water passes through Backwash the outlet pipe to discharge. the

Claims (4)

1. An integrated square type biological aerated filter reactor for denitrification and phosphorus removal, the reactor includes a regulating tank (1), and the regulating pond is connected with a vertical sedimentation tank (5) by a sewage metering pump (2). A tubular static mixer (4) is installed on the pipe section between the sewage metering pump (2) and the vertical sedimentation tank (5), the bottom of the vertical sedimentation tank (5) is connected with a mud discharge pipe (19), and the upper part of the vertical sedimentation tank The effluent overflows into the square biological aerated filter (6). 2. The integrated square biological aerated filter reactor for denitrification and phosphorus removal as claimed in claim 1, characterized in that an aeration disc (12) is installed at the bottom of the square biological aerated filter (6) , aeration pipe (11), backwash water inlet pipe (15), water outlet pipe (9), air compressor (10) is connected with aeration pipe (11), backwash water pump (14) and backwash water inlet pipe (15 )connect. 3. The integrated square biological aerated filter reactor for denitrification and phosphorus removal as claimed in claim 1, characterized in that the vertical sedimentation tank (5) is placed inside the square biological aerated filter (6). 4. The integrated square biological aerated filter reactor for denitrification and phosphorus removal as claimed in claim 1, characterized in that, the square biological aerated filter (6) internal filler is calcium carbonate type biological filter material. the

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