Multi-mode operation enhanced pretreatment biological combination tank

Abstract

The utility model discloses a multi-mode operation enhanced pretreatment biological combination tank, and belongs to the field of sewage treatment. Comprising an accident area, a hydrolysis regulation area, a water distribution area and two groups of AAO biological treatment areas which are respectively arranged in a total tank body, the accident area and the hydrolysis regulation area are arranged at the front end in the total tank body in parallel; the water inlet pipe is internally connected with the accident area through a first valve and internally connected with the hydrolysis adjusting area through a second valve; an AAO biological treatment area is arranged in the total tank body at the rear ends of the accident area and the hydrolysis regulation area; the water outlet end of the hydrolysis regulation area is connected with the water distribution area of the AAO biological treatment area, and a water outlet pipe is arranged at the rear end of the AAO biological treatment area. The combined tank flexibly adjusts and selects main functions required to be played according to the water quality condition of inlet water, can effectively save investment cost and occupied area, improves load impact resistance of a system, ensures stable operation of the system, and is beneficial for realizing stable up-to-standard discharge of a sewage plant.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an enhanced pretreatment biological combined pool with multi-mode operation. Background Art

[0002] The wastewater quality in comprehensive industrial parks is characterized by large wastewater discharge and large fluctuations in water quality and quantity. Sewage treatment processes often set up regulating ponds to adjust water quality and quantity. Considering the instability of industrial wastewater, when the water quality deteriorates slightly, it belongs to the category of difficult biodegradation. Setting up a regulating pond alone cannot meet the requirements of the treatment process. Usually, a hydrolysis acidification pond needs to be set up to improve the biodegradability of sewage and ensure the stable operation and treatment effect of the subsequent biological pond. However, due to the constraints of land occupation and investment costs in many park sewage treatment plants, setting up a regulating pond and a hydrolysis acidification pond alone cannot meet the needs of the treatment project. Especially for large-scale sewage treatment plants, the problems of land occupation and investment are more prominent.

[0003] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0004] The purpose of the present utility model is to provide an enhanced pretreatment biological combined pool with multi-mode operation, which can flexibly adjust the operation function of the process according to the influent water conditions, stably and effectively remove pollutants such as COD, ammonia nitrogen, total nitrogen, and total phosphorus, save investment costs and floor area, is convenient for operation, maintenance and management, is beneficial to the stable compliance of the effluent, and thus solves the above-mentioned technical problems existing in the prior art.

[0005] The purpose of the present utility model is achieved through the following technical solutions:

[0006] An enhanced pretreatment biological combined pool with multi-mode operation, characterized by comprising:

[0007] A total pool body, an accident area, a hydrolysis regulation area, an influent pipe, a first valve, a second valve, and an AAO biological treatment area; wherein,

[0008] The accident area, the hydrolysis regulation area, a water distribution area, and two groups of AAO biological treatment areas are respectively arranged in the total pool body;

[0009] The accident area and the hydrolysis regulation area are arranged in parallel at the front end in the total pool body;

[0010] The influent pipe is connected to the accident area through the first valve and to the hydrolysis regulation area through the second valve;

[0011] The AAO biological treatment area is arranged in the total pool body at the rear ends of the accident area and the hydrolysis regulation area;

[0012] The water outlet end of the hydrolysis regulation zone is connected to the water distribution zone of the AAO biological treatment zone, and a water outlet pipe is arranged at the rear end of the AAO biological treatment zone.

[0013] Compared with the prior art, the enhanced pretreatment biological combined pool with multi-mode operation provided by the present utility model has the following beneficial effects:

[0014] By setting up the hydrolysis regulation zone, it can flexibly adjust the operation mode according to the influent water quality, give full play to the main functions of the hydrolysis regulation zone to maintain the stable operation of the system and improve the sewage treatment efficiency; it can conveniently mix the sewage and the returned sludge completely, with the dual effects of homogenization and hydrolysis acidification, and effectively pre-treat the influent water; since the regulation pool and the hydrolysis acidification pool are integrated and co-constructed with the AAO to form an integrated device, it can effectively save the investment cost and floor area; this combined pool has both the functions of enhanced pretreatment and nitrogen and phosphorus removal, has strong resistance to load impact, the system operates stably, and the treatment effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of the enhanced pretreatment biological combined pool with multi-mode operation provided by the embodiment of the present utility model.

[0017] Reference numerals in the figure: A - accident area; B - hydrolysis regulation zone; C - water distribution zone; D - anaerobic zone; E - anoxic zone; F - aerobic zone; 1 - influent pipe; 2 - first valve; 3 - second valve; 4 - first sewage pump; 5 - first submersible agitator; 6 - second sewage pump; 7 - effluent gate; 8 - first gate; 9 - submersible mixer; 10 - second submersible agitator; 11 - water passing hole; 12 - channel; 13 - second gate; 14 - third gate; 15 - returned sludge pipe; 16 - third valve; 17 - fourth valve; 18 - mixed liquor return pump; 19 - effluent pipe; 20 - total tank body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments, which does not constitute a limitation to the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0019] First, the terms that may be used in this article are described as follows:

[0020] The term "and / or" means that either one or both of the two can be realized. For example, X and / or Y means that it includes both the case of "X" or "Y" and the three cases of "X and Y".

[0021] The description of terms such as "comprising", "including", "containing", "having" or other similar semantics should be interpreted as non-exclusive inclusion. For example: including a certain technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction condition, processing condition, parameter, algorithm, signal, data, product or article, etc.) should be interpreted as not only including the clearly listed certain technical feature element, but also including other technical feature elements well-known in the art that are not clearly listed.

[0022] The term "consisting of" means excluding any technical feature element that is not clearly listed. If this term is used in a claim, this term will make the claim a closed type, making it not include technical feature elements other than the clearly listed technical feature elements, except for related conventional impurities. If this term only appears in a certain clause of the claim, then it only limits the elements clearly listed in that clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0023] Unless otherwise clearly specified or limited, terms such as "install", "connect", "join", "fix", etc. should be understood in a broad sense. For example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this article can be understood according to specific situations.

[0024] The terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of description and simplification of the description, rather than explicitly or implicitly indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this text.

[0025] The following provides a detailed description of the solution provided by the present utility model. The content not described in detail in the embodiments of the present utility model belongs to the prior art well-known to those skilled in the art. In the embodiments of the present utility model, those not specified in specific conditions are carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. For the reagents or instruments not specified in the embodiments of the present utility model in terms of the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0026] As Figure 1 shown, an enhanced pretreatment biological combined pool with multi-mode operation provided by an embodiment of the present utility model includes:

[0027] A total pool body 20, an accident area A, a hydrolysis and regulation area B, a water inlet pipe 1, a first valve 2, a second valve 3, and an AAO biological treatment area; wherein,

[0028] The accident area A, the hydrolysis and regulation area B, a water distribution area C, and two groups of AAO biological treatment areas are respectively arranged in the total pool body;

[0029] The accident area A and the hydrolysis and regulation area B are arranged in parallel at the front end in the total pool body 20;

[0030] The water inlet pipe is connected to the inside of the accident area A through the first valve 2 and to the inside of the hydrolysis and regulation area B through the second valve 3;

[0031] The AAO biological treatment area is arranged in the total pool body 20 at the rear ends of the accident area A and the hydrolysis and regulation area B;

[0032] The water outlet end of the hydrolysis and regulation area B is connected to the water distribution area C of the AAO biological treatment area, and a water outlet pipe 19 is arranged at the rear end of the AAO biological treatment area.

[0033] Preferably, in the above combined pool, a first sewage pump 4 is arranged in the accident area A, and the first sewage pump 4 is connected to the inside of the hydrolysis and regulation area B through a pipeline.

[0034] Preferably, in the above combined pool, a diversion wall is provided in the hydrolysis regulation area B to divide it into two ditches. A first submersible agitator 5 for promoting the circulating flow of sewage is provided in each of the two ditches, forming a pushing circulation structure in the form of an oxidation ditch in the hydrolysis regulation area B;

[0035] At the end of the ditch at the rear end, a second sewage pump 6 and an effluent gate 7 are provided, and the effluent gate 7 is connected to the water distribution area C of the AAO biological treatment area.

[0036] Preferably, in the above combined pool, it is characterized in that the AAO biological treatment area includes:

[0037] The water distribution area C, two anaerobic areas D, two anoxic areas E, two aerobic areas F, a mixed liquor return pump 18, two channels 12, a branch channel and the outlet pipe 19; among them,

[0038] The two anaerobic areas D are symmetrically arranged in the middle part of the total pool body 20 at the rear end of the hydrolysis regulation area B;

[0039] The water distribution area C is embedded in the front ends of the two anaerobic areas D, and the rear end of the water distribution area C is connected to an anaerobic area D through a first gate 8 respectively;

[0040] An anoxic area E is arranged in the total pool body outside each anaerobic area D, and each anaerobic area D is connected to the anoxic area E arranged on the same side;

[0041] Two aerobic areas F are symmetrically arranged in the total pool body 20 at the rear ends of the two anaerobic areas D and the two anoxic areas E, and the rear end of each anoxic area E is connected to the aerobic area F arranged on the same side;

[0042] The mixed liquor return pump 18 and two channels 12 connected to the mixed liquor return pump 18 are respectively arranged in the middle parts of the two aerobic areas F. The end of one channel 12 is connected to an anoxic area E through a water hole 11, and the other channel 12 is connected to the other anoxic area E through a third gate 14;

[0043] One of the two channels 12 is connected to a branch channel arranged outside an anaerobic area D, and is connected back to the hydrolysis regulation area B through the branch channel;

[0044] The outlet pipe 19 is arranged in the middle part at the rear end of the two aerobic areas F.

[0045] Preferably, in the above combined pool, the sludge return pipe 15 is connected to the water distribution area C through a connected third valve 16 and is connected to the hydrolysis regulation area B through a fourth valve 17;

[0046] Preferably, in the above combined pool, the two anaerobic areas D have the same structure, and a second submersible stirrer is provided in each anaerobic area.

[0047] Preferably, in the above-mentioned combined pool, the two anoxic zones E have the same structure, and each anoxic zone E is provided with a guide wall to divide the interior into two ditches. Both ditches are provided with a second submersible flow propeller 10 for promoting the circulation of sewage, forming a flow circulation structure in the form of an oxidation ditch in each anoxic zone E.

[0048] Preferably, in the above-mentioned combined pool, the two aerobic zones F have the same structure, a plurality of partition walls are arranged in parallel in each aerobic zone F, and the openings of adjacent partition walls are staggered, so that a water flow channel with a return structure is formed in the aerobic zone F.

[0049] In summary, it can be seen that the combined pool of the embodiment of the utility model is mainly composed of a hydrolysis regulation zone and an AAO biological treatment zone, wherein the hydrolysis regulation zone has both regulation and hydrolysis functions, which can homogenize the water quality and improve the biodegradability of sewage; it can also be flexibly adjusted according to the influent water quality, and used separately for water quality, water volume regulation and hydrolysis functions.

[0050] When the biodegradability of the influent water is good and the water quality and quantity fluctuate greatly, the hydrolysis regulation zone is mainly used to homogenize and equalize the quantity to reduce the impact on subsequent biochemical treatment. The internal sewage pump is used to lift the sewage to the subsequent biological pool to reduce the impact of water quality and water quantity fluctuations on subsequent treatment structures.

[0051] When the biodegradability of the influent is poor, the hydrolysis adjustment zone mainly plays a role in homogenization and hydrolysis and acidification. It utilizes the reaction of hydrolysis and acid-producing bacteria to hydrolyze insoluble organic matter into soluble organic matter and decompose large molecular substances into small molecular substances, thereby improving the biodegradability of the sewage and making the sewage more suitable for subsequent biological treatment. At the same time, it has a certain removal effect on organic matter, total nitrogen and total phosphorus. At this time, the hydrolysis adjustment zone needs to carry out sludge return and mixed liquor return.

[0052] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the solution provided by the embodiments of the present invention is described in detail with specific embodiments below.

[0053] Example 1

[0054] like Figure 1As shown in the figure, this embodiment provides a reinforced pretreatment biological combination pool with multi-mode operation, mainly including: an accident area, a hydrolysis regulation area, and an AAO biological treatment area. The incoming water can be switched through the first valve 2 and the second valve 3 according to the actual water quality. When the incoming water quality is abnormally high, the second valve 3 can be closed and the first valve 2 can be opened to make the incoming water enter the accident area A for temporary storage, and then it is evenly lifted to the hydrolysis regulation area B by the first sewage pump 4 for water quality homogenization. When the incoming water quality is normal, the first valve 2 is closed and the second valve 3 is opened to make the incoming water enter the hydrolysis regulation area B. The hydrolysis regulation area B adopts a plug-flow circulation mixing method similar to the oxidation ditch form. There is a guiding wall inside to divide the hydrolysis regulation area into two ditches. The first submersible agitator 5 is respectively installed in the two ditches to push the sewage to circulate and flow, so that the sewage is completely mixed evenly; a second sewage pump 6 and an outlet gate 7 are arranged near the end of the channel. When the hydrolysis regulation area B is mainly used for water quality and water volume regulation functions, the outlet gate 7 can be closed, and the sewage is evenly lifted to the subsequent water distribution area C by the second sewage pump 6 to balance the water volume and relieve the impact of water volume shock on the subsequent treatment structures; when the biodegradability of the incoming water is poor, this area mainly plays the role of homogenization and hydrolysis acidification to homogenize the water quality and improve the biodegradability of the sewage. At this time, the second sewage pump 6 does not work, and the water outlet of the hydrolysis regulation area B flows into the water distribution area C by self-flow through the outlet gate 7 and the connected holes. At the same time, the fourth valve 17 is opened to make the returned sludge enter the hydrolysis regulation area B. Through sludge return, the sludge concentration in the hydrolysis acidification tank can be increased; the second gate 13 is opened to make the mixed liquid flow back from the aerobic area F into the hydrolysis regulation area B. Through the return of the mixed liquid, the denitrification function can be improved; the returned sludge and the mixed liquid are completely mixed with the sewage in the branch ditch to achieve the dual effects of homogenization and hydrolysis acidification, and at the same time, the impact of nitrate in the sludge on subsequent anaerobic phosphorus removal can be reduced.

[0055] The water distribution area C evenly distributes water to the two groups of AAO tanks through rectangular weir plates, and most of the organic matter is removed and nitrogen and phosphorus are removed in the AAO tanks. After the water outlet of the hydrolysis regulation area B is evenly distributed by the water distribution area C, it enters the anaerobic area D to remove part of the BOD in the influent 5 and carry out anaerobic phosphorus release; the anoxic area E carries out denitrification to remove nitrate nitrogen, and the aerobic area F removes most of the organic matter. At the same time, a nitrification reaction occurs to convert ammonia nitrogen into nitrate nitrogen, and it is refluxed to the anoxic area E and the hydrolysis regulation area B through the mixed liquid reflux pump 18. The reflux volume of each area can be adjusted by the opening degrees of the second gate 13 and the third gate 14; the sewage treated by the combination pool enters the subsequent sewage treatment structures through the outlet pipe 19.

[0056] The enhanced pretreatment biological combined pool capable of multi-mode operation of the present utility model integrates the functions of regulation and hydrolysis and forms an integrated combined pool with the AAO pool. At the same time, it can also flexibly adjust and select the main functions to be exerted according to the influent water quality, effectively saving the investment cost and floor area, improving the load impact resistance of the system, ensuring the stable operation of the system, helping the sewage treatment plant to achieve stable up-to-standard discharge, and thus well solving the problems of large fluctuations in the water quality and quantity of wastewater in comprehensive industrial parks and poor biodegradability.

[0057] As described above, it is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims. The information disclosed in the background art part of this article is only intended to deepen the understanding of the overall background art of the present utility model, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art.

Claims

1. A multi-mode operation enhanced pretreatment biological combination pool, characterized in that: include: The main tank body (20), the accident area (A), the hydrolysis adjustment area (B), the water inlet pipe (1), the first valve (2), the second valve (3) and the AAO biological treatment area; wherein, The accident area (A), the hydrolysis adjustment area (B), the water distribution area (C) and two groups of AAO biological treatment areas are respectively arranged in the main pool; The accident area (A) and the hydrolysis adjustment area (B) are arranged in parallel at the front end of the main tank body (20); The water inlet pipe is connected to the accident area (A) through a first valve (2), and is connected to the hydrolysis adjustment area (B) through a second valve (3); The AAO biological treatment zone is arranged in the main tank body (20) at the rear end of the accident zone (A) and the hydrolysis adjustment zone (B); The water outlet end of the hydrolysis adjustment zone (B) is connected to the water distribution zone (C) of the AAO biological treatment zone, and a water outlet pipe (19) is arranged at the rear end of the AAO biological treatment zone.

2. The multi-mode operation enhanced pretreatment biological combination pool according to claim 1, characterized in that: A first sewage pump (4) is arranged in the accident area (A), and the first sewage pump (4) is connected to the hydrolysis adjustment area (B) through a pipeline.

3. The multi-mode operation enhanced pretreatment biological combination pool according to claim 1, characterized in that: The hydrolysis regulating area (B) is provided with a guide wall to divide the interior into two ditches, and the two ditches are both provided with a first submersible flow propeller (5) for promoting the circulation of sewage, so that a flow propeller circulation structure in the form of an oxidation ditch is formed in the hydrolysis regulating area (B); A second sewage pump (6) and a water outlet gate (7) are provided at the end of the ditch at the rear end, and the water distribution area (C) of the AAO biological treatment area is connected via the water outlet gate (7).

4. The multi-mode operation enhanced pretreatment biological combination pool according to any one of claims 1 to 3, characterized in that: The AAO biological treatment area includes: The water distribution area (C), two anaerobic areas (D), two anoxic areas (E), two aerobic areas (F), a mixed liquid return pump (18), two channels (12), a branch channel and the outlet pipe (19); wherein, Two anaerobic zones (D) are symmetrically arranged in the middle of the main tank body (20) at the rear end of the hydrolysis adjustment zone (B); The water distribution area (C) is embedded in the front ends of the two anaerobic areas (D), and the rear ends of the water distribution area (C) are connected to one anaerobic area (D) via a first gate (8); An anoxic zone (E) is arranged in the main tank body outside each anaerobic zone (D), and each anaerobic zone (D) is connected to the anoxic zone (E) arranged on the same side; Two aerobic zones (F) are symmetrically arranged in the main tank body (20) at the rear ends of the two anaerobic zones (D) and the two anoxic zones (E), and the rear end of each anoxic zone (E) is connected to the aerobic zone (F) arranged on the same side; The mixed liquid reflux pump (18) and two channels (12) connected to the mixed liquid reflux pump (18) are respectively arranged in the middle of the two aerobic zones (F); the end of one channel (12) is connected to one anoxic zone (E) through a water hole (11), and the other channel (12) is connected to the other anoxic zone (E) through a third gate (14); One of the two channels (12) is connected to a branch channel arranged outside an anaerobic zone (D) and is connected back to the hydrolysis regulation zone (B) via the branch channel; A water outlet pipe (19) is arranged in the middle of the rear ends of the two aerobic zones (F).

5. The multi-mode operation enhanced pretreatment biological combination pool according to claim 4, characterized in that: The AAO biological treatment zone also includes a sludge return pipe (15), which is connected to the water distribution zone (C) via a third valve (16) and is connected to the hydrolysis adjustment zone (B) via a fourth valve (17).

6. The multi-mode operation enhanced pretreatment biological combination pool according to claim 4, characterized in that: The two anoxic zones (E) have the same structure. A diversion wall is provided in each anoxic zone (E) to divide the interior into two ditches. A second submersible flow propeller (10) is provided in each of the two ditches to promote the circulation of sewage, forming a flow circulation structure in the form of an oxidation ditch in each anaerobic zone (D).

7. The multi-mode operation enhanced pretreatment biological combination pool according to claim 4, characterized in that: The two anaerobic zones (D) have the same structure, and each anaerobic zone is provided with a third submersible mixer.

8. The multi-mode operation enhanced pretreatment biological combination pool according to claim 4, characterized in that: The two aerobic zones (F) have the same structure. A plurality of partition walls are arranged in parallel in each aerobic zone (F). The openings of adjacent partition walls are staggered to form a water flow channel with a return structure in the aerobic zone (F).

Images