Tower type integrated equipment for AAO sewage treatment

Abstract

The utility model discloses tower-type integrated equipment for AAO (anaerobic-anoxic-oxic) sewage treatment, which comprises a tower body, a circulating pump and an air blower, an inner cavity of the tower body is respectively provided with two partition plates along the height direction so as to form an anaerobic hydrolytic acidification area, an anoxic denitrification area and an aeration nitrification area from bottom to top, the partition plates are provided with up-and-down through up-and-down rising flow channels, and the rising flow channels are communicated with the circulating pump. The output end of the circulating pump is connected to the bottom of the anoxic denitrification area through a nitrification liquid return pipe, an aerator is arranged on a partition plate at the bottom of the aeration nitrification area, the air blower is communicated with the aerator through an aeration pipe, a water collecting weir is arranged at the top of an inner cavity of the aeration nitrification area, and the water collecting weir is communicated with the aeration pipe. The top of the tower body is fixedly provided with a drain pipe communicated with the water collecting weir, and the bottom of the tower body is fixedly provided with a water inlet pipe and a sludge return pipe which are communicated to the anaerobic hydrolysis acidification area. The equipment has the special advantages that the sewage treatment capacity is improved under the condition of limited land resources, the occupied land is small, the cost investment is low, and the equipment is convenient to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment equipment technical field, concretely is the tower type integrated equipment of AAO sewage treatment. BACKGROUND

[0002] A2 / O process (AAO process, AAO method) is a commonly used secondary sewage treatment process, has the effect of simultaneous nitrogen and phosphorus removal, can be used for secondary sewage treatment or tertiary sewage treatment, can be used as water reuse after subsequent increase of depth treatment, has good nitrogen and phosphorus removal effect. Enterprises gradually develop in the operation process, and the enterprise wastewater treatment capacity also needs to be improved accordingly, but many existing enterprises have the problem of limited factory area, and the existing sewage treatment system occupies a large area, so it is difficult to provide corresponding sites for sewage treatment equipment or structures. SUMMARY

[0003] The utility model discloses a tower type integrated equipment of AAO sewage treatment, to solve the problem in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a tower type integrated equipment of AAO sewage treatment, including tower body, circulating pump and air blower, the inner chamber of tower body is along height direction respectively two partitioning partition is set up to form from the anaerobic hydrolysis acidification zone, the anoxic denitrification zone, the aeration nitrification zone of top, the partitioning partition is equipped with the up-and-down through -flow passage, the output of circulating pump is connected to the bottom of anoxic denitrification zone through nitrification liquid backflow pipe, the partitioning partition on the bottom of aeration nitrification zone is equipped with aerator, the air blower is connected aerator through aeration pipe, the inner chamber top of aeration nitrification zone is provided with the water collecting weir, the top of tower body is fixedly installed with the drain pipe that connects the water collecting weir, the bottom of tower body is fixedly installed with the inlet pipe and sludge backflow pipe that connect to anaerobic hydrolysis acidification zone.

[0005] Preferably, the side of the tower body is fixedly installed with an exhaust pipe, and the upper side of the anaerobic hydrolysis acidification zone and the anoxic denitrification zone is connected with the exhaust pipe.

[0006] Compared with the prior art, the utility model has the advantages that: the equipment adopts integrated tower type structure, is used for AAO treatment of sewage to realize phosphorus removal and nitrogen removal, has the advantages of less land occupation, small cost investment and convenient installation. BRIEF DESCRIPTION OF DRAWINGS

[0007] Fig. 1 It is the structure schematic diagram of the utility model;

[0008] Fig. 2 It is the bottom schematic diagram of aeration nitrification zone;

[0009] Fig. 3 Schematic view of the bottom of the anoxic denitrification zone.

[0010] In the figure: 1, water inlet pipe; 2, sludge return pipe; 3, anaerobic hydrolysis acidification zone; 4, upflow channel; 5, exhaust pipe; 6, anoxic denitrification zone; 7, partitioning baffle; 8, aeration nitrification zone; 9, water collecting weir; 10, water outlet pipe; 11, circulating pump; 12, nitrification liquid return pipe; 13, air blower; 14, aeration pipe; 15, aerator. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0012] Please refer to Figs. 1-3 The present application provides a technical solution: a tower type integrated device for AAO wastewater treatment, comprising a tower body, a circulating pump 11 and an air blower 13. The tower body is a cylindrical structure. Two partitioning baffles 7 are arranged in the inner cavity of the tower body along the height direction to form, from bottom to top, an anaerobic hydrolysis acidification zone 3, an anoxic denitrification zone 6 and an aeration nitrification zone 8. The partitioning baffles 7 are provided with an upflow channel 4 that penetrates from top to bottom. The upflow channel 4 is a circular hole structure. An exhaust pipe 5 is fixedly installed on the side surface of the tower body. The upper side surface of the anaerobic hydrolysis acidification zone 3 and the anoxic denitrification zone 6 is connected to the exhaust pipe 5.

[0013] The output end of the circulating pump 11 is connected to the bottom of the anoxic denitrification zone 6 through a nitrification liquid return pipe 12. The circulating pump 11 is connected to the nitrification liquid from the rear section (aeration nitrification zone 8) of the treatment. An aerator 15 is arranged on the partitioning baffle 7 at the bottom of the aeration nitrification zone 8. The air blower 13 is connected to the aerator 15 through an aeration pipe 14 to perform oxygenation on the water body. A water collecting weir 9 is arranged at the top of the inner cavity of the aeration nitrification zone 8. A water outlet pipe 10 that is connected to the water collecting weir 9 is fixedly installed on the top of the tower body. A water inlet pipe 1 and a sludge return pipe 2 that are connected to the anaerobic hydrolysis acidification zone 3 are fixedly installed on the bottom of the tower body.

[0014] Working principle: After pretreatment, the wastewater is collected and then enters the anaerobic hydrolysis acidification zone 3 through the wastewater inlet pipe 1 and the sludge return pipe 2 of the sedimentation tank. The wastewater is completely mixed through side cyclone. The phosphorus accumulating bacteria in the anaerobic hydrolysis acidification zone 3 decompose the polyphosphate in the body, release phosphorus and absorb low-grade fat and other easily degradable organic matter. At the same time, the facultative anaerobic fermentation bacteria convert the biodegradable organic matter in the wastewater into volatile fatty acid substances VFA.

[0015] The effluent from the anaerobic hydrolysis acidification zone 3 enters the anoxic denitrification zone 6 through the upflow passage 4, in which the denitrifying bacteria use the nitrate produced in the aerobic section to perform denitrification, thereby reducing BOD5 and removing nitrogen. The nitrate brought in by the nitration liquid reflux pipe 12 is converted into nitrogen gas by biological denitrification and escapes into the exhaust pipe 5, thereby achieving the purpose of nitrogen removal. The gases produced in the anaerobic hydrolysis acidification zone 3 and the anoxic denitrification zone 6 are discharged through the exhaust pipe 5 on one side for centralized treatment. The anaerobic hydrolysis acidification zone 3 and the anoxic denitrification zone 6 are provided with two partitioning plates 7 to avoid functional interference of various water bodies, and the water bodies flow through the upflow passage 4.

[0016] The water treated in the anoxic denitrification zone 6 enters the aeration nitrification zone 8 through the upflow passage 4. The microorganisms in the aeration nitrification zone 8 are supplied with oxygen by the air blower 13, the air blowing aeration pipe 14 and the aerator 15 to meet the oxygen requirement of the microorganisms for decomposing and oxidizing organic matters and to absorb excess phosphorus by using phosphorus-accumulating bacteria. The water after aeration nitrification flows into the effluent collecting weir 9 and the drain pipe 10 under the action of upflow. Part of the effluent from the drain pipe 10 flows into the sedimentation tank for mud-water separation, and part of the total phosphorus is discharged from the system together with the residual sludge in the sedimentation tank, thereby achieving the purpose of phosphorus removal. The other part of the effluent is transported by the circulating pump 11 into the anoxic denitrification zone through the reflux pipe 12 to perform anoxic denitrification on the effluent from the anaerobic hydrolysis acidification zone 3, thereby achieving the purpose of removing ammonia nitrogen in the water.

[0017] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tower integrated device for AAO wastewater treatment, comprising a tower body, a circulating pump (11) and a blower (13), characterized in that: The inner cavity of the tower body is provided with two partition plates (7) in the height direction respectively to form an anaerobic hydrolysis acidification zone (3), an anoxic denitrification zone (6) and an aeration nitrification zone (8) from bottom to top, the partition plates (7) are provided with up-and-down penetrating up-flow channels (4), the output end of the circulating pump (11) is connected to the bottom of the anoxic denitrification zone (6) through a nitrification liquid return pipe (12), the partition plate (7) at the bottom of the aeration nitrification zone (8) is provided with an aerator (15), the air blower (13) is connected to the aerator (15) through an aeration pipe (14), the inner cavity of the aeration nitrification zone (8) is provided with a water collecting weir (9) at the top, the top of the tower body is fixedly provided with a water drainage pipe (10) connected to the water collecting weir (9), and the bottom of the tower body is fixedly provided with a water inlet pipe (1) connected to the anaerobic hydrolysis acidification zone (3) and a sludge return pipe (2).

2. The tower integrated plant for AAO wastewater treatment according to claim 1, characterized in that: The side surface of the tower body is fixedly provided with an exhaust pipe (5), and the upper side surfaces of the anaerobic hydrolysis acidification zone (3) and the anoxic denitrification zone (6) are connected to the exhaust pipe (5).

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