CN210457855U - Combined sewage treatment system - Google Patents
Combined sewage treatment system Download PDFInfo
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- CN210457855U CN210457855U CN201921258036.4U CN201921258036U CN210457855U CN 210457855 U CN210457855 U CN 210457855U CN 201921258036 U CN201921258036 U CN 201921258036U CN 210457855 U CN210457855 U CN 210457855U
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Abstract
The utility model relates to a modular sewage treatment system, it includes preceding oxygen deficiency pond, the anaerobism pond, well oxygen deficiency pond, good oxygen pond, back oxygen deficiency pond, back good oxygen pond, carbon source medicament district, dephosphorization medicament district, the mud district, the pool goes out, two sink ponds, biochemical pond water inlet header pipe, dissolved oxygen appearance, aeration pipe, first carbon source dosing pipe, second carbon source dosing pipe, output tube, sludge discharge pipe, return sludge pipe, nitrify liquid back flow, the backwash pump, the flowmeter, flow control valve, dephosphorization dosing pipe, residual sludge discharge pipe, clear water elevator pump and clear water conveyer pipe. The utility model discloses to disperse the biological reaction district that sets up in the technology in the past, mud sedimentation district, mud backward flow district, play water and promote combination settings such as district, carbon source, dephosphorization medicament dosing region, can simplify the flow, arrange the compactness to can practice thrift the place.
Description
Technical Field
The utility model belongs to the technical field of for sewage treatment technique and specifically relates to a modular sewage treatment system.
Background
In the existing sewage treatment process flow, the sewage in a sewage pump room is generally transferred into a biochemical tank after passing through a coarse and fine grid and a grit chamber. To ensure the uniformity of the water distribution per structure, it is common practice to provide a drop weir at the end of the structure. The aeration grit chamber has better grit effect, and is widely used in recent years. Due to the water drop oxygen enrichment function and the pre-aeration function of the aeration grit chamber, when the sewage enters the biochemical tank, a large amount of dissolved oxygen is carried in the sewage, so that the sewage can be directly polluted, the anaerobic zone is difficult to form a normal anaerobic environment, anaerobic microorganisms are difficult to survive, the phosphorus release is insufficient, the biological phosphorus removal capacity of the biological tank is difficult, and the removal of phosphate only depends on the addition of chemical precipitation agents, so that the sewage treatment cost is increased.
Meanwhile, in the traditional design, a biological reaction area, a sludge settling area, a sludge reflux area, an effluent lifting area, a carbon source, a phosphorus removal agent adding area and the like are dispersedly arranged, so that the problems of various structures, long construction period, unsafety in land resource utilization and the like exist.
Disclosure of Invention
The utility model aims at overcoming the defects existing in the prior art and providing a combined sewage treatment system which can improve the biological nitrogen and phosphorus removal treatment effect of sewage.
According to the technical scheme provided by the utility model, the combined sewage treatment system comprises a front group of combined biochemical tanks and a rear group of combined biochemical tanks, wherein each set of combined biochemical tank comprises a front anoxic tank, an anaerobic tank, a middle anoxic tank, an aerobic tank, a rear anoxic tank, a rear aerobic tank and a secondary sedimentation tank which are sequentially arranged along the sewage conveying direction; a carbon source reagent area is arranged between a rear aerobic tank and a secondary sedimentation tank in the front combined biochemical tank, and a phosphorus removal reagent area is arranged between the rear aerobic tank and the secondary sedimentation tank in the rear combined biochemical tank; a sludge area is arranged between the two anoxic tanks and the two secondary sedimentation tanks; a water outlet area is arranged behind the two secondary sedimentation tanks, a clear water lifting pump is arranged in the water outlet area, and a clear water conveying pipe is connected to the outlet of the clear water lifting pump;
the biochemical pond water inlet main pipe is connected with a front anoxic pond, an anaerobic pond, a middle anoxic pond and an anoxic pond in parallel through a branch pipe, a flowmeter and a flow regulating valve are installed on the branch pipe, a plurality of dissolved oxygen meters and aeration pipes are arranged in the aerobic pond at intervals along the sewage conveying direction, the inlet end of a first carbon source dosing pipe and the inlet end of a second carbon source dosing pipe are both arranged in a carbon source medicament area, the outlet end of the first carbon source dosing pipe is arranged in the rear anoxic pond, and the outlet end of the second carbon source dosing pipe is arranged in the middle anoxic pond;
the inlet end of a communicating pipe is connected with the sludge outlet end of the rear aerobic tank, the outlet end of the communicating pipe is connected with the sludge inlet end of the secondary sedimentation tank, the inlet end of a sludge discharge pipe is connected with the sludge outlet end of the secondary sedimentation tank, the outlet end of the sludge discharge pipe is connected with the sludge inlet end of the sludge zone, the inlet end of a return sludge pipe is connected with the sludge outlet end of the front anoxic tank, the inlet end of a residual sludge discharge pipe is connected with the residual sludge discharge port of the sludge zone, the inlet end of a dephosphorization dosing pipe is arranged in a dephosphorization agent zone, the outlet end of the dephosphorization dosing pipe is arranged in the rear aerobic tank, a reflux pump is arranged at the tail end of the aerobic tank, the outlet end of the reflux pump is connected with the inlet end of a nitrification liquid reflux pipe.
The aerobic tank is formed by connecting an aerobic tank straight line area and an aerobic tank bending area, and the aerobic tank bending area is positioned at the front end of the aerobic tank straight line area.
The tail end of the bending area of the aerobic tank of the reflux pump.
The front combined biochemical pool is divided into three cavities by a front main pool body through two transverse partition plates, the middle cavity forms an aerobic pool straight line region, the front cavity is divided into an aerobic pool bending region, a rear anoxic pool and a rear aerobic pool through two longitudinal partition plates, and the rear cavity is divided into a front anoxic pool, an anaerobic pool and a middle anoxic pool through two longitudinal partition plates;
the rear combined biochemical pool is formed by a main pool body which is positioned at the rear and is separated by two transverse separation plates to form three cavities, the middle cavity forms a linear area of the aerobic pool, the front cavity forms a front anoxic pool, an anaerobic pool and a middle anoxic pool by two longitudinal separation plates, and the rear cavity forms a bending area of the aerobic pool, a rear anoxic pool and a rear aerobic pool by two longitudinal separation plates.
The rear partition plate of the main pool body positioned in the front is a shared partition plate with the front partition plate of the main pool body positioned in the rear, the two-stage sedimentation pool is a circular pool body, the right partition plate of the main pool body positioned in the front is tangent to the circular partition plate of the two-stage sedimentation pool, the right partition plate of the main pool body positioned in the rear is tangent to the circular partition plate of the two-stage sedimentation pool, and the circular partition plates of the two-stage sedimentation pool are tangent to each other.
The front combined biochemical pool is divided into a left cavity and a right cavity by a front main pool body through a longitudinal main partition plate, the left cavity forms an aerobic pool, the right cavity is divided into a front cavity and a rear cavity through a transverse partition plate, the rear cavity forms a middle anoxic pool, the front cavity is divided into four cavities through a transverse partition plate and a longitudinal partition plate, and the four cavities respectively form a front anoxic pool, an anaerobic pool, a rear anoxic pool and a rear aerobic pool;
the combined biochemical pool is characterized in that the combined biochemical pool at the rear part is divided into a left cavity and a right cavity by a main pool body at the rear part through a longitudinal main partition plate, the left cavity forms an aerobic pool, the right cavity is divided into a front cavity and a rear cavity through a transverse partition plate, the front cavity forms a middle anoxic pool, the rear cavity is divided into four cavities through a transverse partition plate and a longitudinal partition plate, and the four cavities respectively form the front anoxic pool, the anaerobic pool, the rear anoxic pool and the rear aerobic pool.
The rear partition plate of a main pool body in the front and the front partition plate of a main pool body in the rear are shared partition plates, the two-stage sedimentation pool is a circular pool body, the right partition plate of a main pool body in the front and the circular partition plate of the two-stage sedimentation pool are arranged in a tangent mode, the right partition plate of a main pool body in the rear and the circular partition plate of the two-stage sedimentation pool are arranged in a tangent mode, and the circular partition plates of the two-stage sedimentation pool are arranged in an outward-separated mode.
The aerobic tank is provided with a snakelike water channel connected end to end, and the reflux pump is positioned at the tail end of the snakelike water channel.
The utility model has the advantages of it is following:
the sewage treatment system of the utility model has compact structural arrangement and reasonable process flow design, is particularly suitable for old sewage treatment plants with limited sites and improved upgrading, eliminates dissolved oxygen in sewage passing through a fine grid and a grit chamber by additionally arranging a front anoxic tank, keeps the parameter conditions of a subsequent anaerobic tank within a standard range, ensures that each area is clearly divided into work and each takes its own role, and greatly improves the sewage treatment effect;
the aerobic zone of the utility model is divided into a straight line zone and a bending zone, and the aeration quantity of the aeration pipe is controlled by measuring, feeding back and adjusting the devices such as the dissolved oxygen instrument, thereby controlling the gradient of the dissolved oxygen in the aerobic tank within a reasonable range. The arrangement of the back anoxic tank increases the sewage retention time, and further performs denitrification treatment;
the arrangement of the rear aerobic tank of the utility model effectively prevents the increase of BOD/COD of the effluent caused by the increase of carbon source in the rear anoxic tank, and also strengthens the biological activity of the activated sludge, so that the sludge and water can be better separated in the secondary sedimentation tank;
the utility model discloses to disperse the biological reaction district that sets up in the technology in the past, mud sedimentation district, mud backward flow district, play water and promote combination settings such as district, carbon source, dephosphorization medicament dosing region, simplify the flow, arrange the compactness, practice thrift the place.
Drawings
FIG. 1 is a layout diagram of a sewage treatment system according to embodiment 1 of the present invention.
FIG. 2 is a layout diagram of a sewage treatment system according to embodiment 2 of the present invention.
FIG. 3 is a flow chart of the sewage treatment method of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Example 1
The combined sewage treatment system of the utility model comprises a front combined biochemical tank and a rear combined biochemical tank, wherein each combined biochemical tank comprises a front anoxic tank 1, an anaerobic tank 2, a middle anoxic tank 3, an aerobic tank 4, a rear anoxic tank 5, a rear aerobic tank 6 and a secondary sedimentation tank 11 which are sequentially arranged along the sewage conveying direction; a carbon source reagent area 7 is arranged between a rear aerobic tank 6 and a secondary sedimentation tank 11 in the front combined biochemical tank, and a phosphorus removal reagent area 8 is arranged between the rear aerobic tank 6 and the secondary sedimentation tank 11 in the rear combined biochemical tank; a sludge area 9 is arranged between the two anoxic tanks 3 and the two secondary sedimentation tanks 11; a water outlet area 10 is arranged behind the two secondary sedimentation tanks 11, a clear water lifting pump 27 is arranged in the water outlet area 10, and a clear water conveying pipe 28 is connected to the outlet of the clear water lifting pump 27;
a front anoxic tank 1, an anaerobic tank 2, a middle anoxic tank 3 and an anoxic tank 5 are connected in parallel in a biochemical tank water inlet main pipe 12 through branch pipes, a flow meter 22 and a flow regulating valve 23 are installed on the branch pipes, a plurality of dissolved oxygen meters 13 and aeration pipes 14 are arranged at intervals in an aerobic tank 4 along the sewage conveying direction, the inlet ends of a first carbon source dosing pipe 15 and a second carbon source dosing pipe 16 are both arranged in a carbon source medicament area 7, the outlet end of the first carbon source dosing pipe 15 is arranged in the rear anoxic tank 5, and the outlet end of the second carbon source dosing pipe 16 is arranged in the middle anoxic tank 3;
the inlet end of a communicating pipe 17 is connected with the sludge outlet end of the rear aerobic tank 6, the outlet end of the communicating pipe 17 is connected with the sludge inlet end of the secondary sedimentation tank 11, the inlet end of a sludge discharge pipe 18 is connected with the sludge outlet end of the secondary sedimentation tank 11, the outlet end of the sludge discharge pipe 18 is connected with the sludge inlet end of the sludge zone 9, the inlet end of a return sludge pipe 19 is connected with the sludge outlet end of the sludge zone 9, the inlet end of the return sludge pipe 19 is connected with the sludge inlet end of the front anoxic tank 1, the inlet of a residual sludge discharge pipe 26 is connected with the residual sludge discharge port of the sludge zone 9, the inlet end of a phosphorus removal dosing pipe 24 is arranged in a phosphorus removal medicament zone 8, the outlet, a reflux pump 21 is arranged in the tail end of the aerobic tank 4, the outlet end of the reflux pump 21 is connected with the inlet end of a nitrifying liquid reflux pipe 20, and the outlet end of the nitrifying liquid reflux pipe 20 is connected into the anoxic tank 3.
The aerobic tank 4 is formed by connecting an aerobic tank straight line area 4.1 with an aerobic tank bending area 4.2, and the aerobic tank bending area 4.2 is positioned at the front end of the aerobic tank straight line area 4.1.
The reflux pump 21 is arranged at the tail end of the bending area 4.2 of the aerobic tank.
The front combined biochemical pool is divided into three cavities by a front main pool body through two transverse division plates, the middle cavity forms an aerobic pool straight line region 4.1, the front cavity is divided into an aerobic pool bending region 4.2, a rear anoxic pool 5 and a rear aerobic pool 6 through two longitudinal division plates, and the rear cavity is divided into a front anoxic pool 1, an anaerobic pool 2 and a middle anoxic pool 3 through two longitudinal division plates;
the rear combined biochemical pool is formed by a main pool body through two transverse partition plates to form three cavities, the middle cavity forms an aerobic pool straight line region 4.1, the front cavity is formed by two longitudinal partition plates to form a front anoxic pool 1, an anaerobic pool 2 and a middle anoxic pool 3, and the rear cavity is formed by two longitudinal partition plates to form an aerobic pool bending region 4.2, a rear anoxic pool 5 and a rear aerobic pool 6.
The back baffle that is located a total cell body in the place ahead is the baffle for sharing with the preceding baffle that is located a total cell body in rear, and two heavy ponds 11 are circular cell body, and the right baffle that is located a total cell body in the place ahead is tangent with the circular baffle that two heavy ponds 11 and arranges, and the right baffle that is located a total cell body in rear is tangent with the circular baffle that two heavy ponds 11 and arranges, and two circular baffles that sink ponds 11 are tangent and arrange.
Example 2
The combined sewage treatment system of the utility model comprises a front group of combined biochemical tanks and a rear group of combined biochemical tanks, wherein each set of combined biochemical tank comprises a front anoxic tank 1, an anaerobic tank 2, a middle anoxic tank 3, an aerobic tank 4, a rear anoxic tank 5, a rear aerobic tank 6 and a secondary sedimentation tank 11 which are arranged in sequence along the sewage conveying direction; a carbon source reagent area 7 is arranged between a rear aerobic tank 6 and a secondary sedimentation tank 11 in the front combined biochemical tank, and a phosphorus removal reagent area 8 is arranged between the rear aerobic tank 6 and the secondary sedimentation tank 11 in the rear combined biochemical tank; a sludge area 9 is arranged between the two anoxic tanks 3 and the two secondary sedimentation tanks 11; a water outlet area 10 is arranged behind the two secondary sedimentation tanks 11, a clear water lifting pump 27 is arranged in the water outlet area 10, and a clear water conveying pipe 28 is connected to the outlet of the clear water lifting pump 27;
a front anoxic tank 1, an anaerobic tank 2, a middle anoxic tank 3 and an anoxic tank 5 are connected in parallel in a biochemical tank water inlet main pipe 12 through branch pipes, a flow meter 22 and a flow regulating valve 23 are installed on the branch pipes, a plurality of dissolved oxygen meters 13 and aeration pipes 14 are arranged at intervals in an aerobic tank 4 along the sewage conveying direction, the inlet ends of a first carbon source dosing pipe 15 and a second carbon source dosing pipe 16 are both arranged in a carbon source medicament area 7, the outlet end of the first carbon source dosing pipe 15 is arranged in the rear anoxic tank 5, and the outlet end of the second carbon source dosing pipe 16 is arranged in the middle anoxic tank 3;
the inlet end of a communicating pipe 17 is connected with the sludge outlet end of a rear aerobic tank 6, the outlet end of the communicating pipe 17 is connected with the sludge inlet end of a secondary sedimentation tank 11, the inlet end of a sludge discharge pipe 18 is connected with the sludge outlet end of the secondary sedimentation tank 11, the outlet end of the sludge discharge pipe 18 is connected with the sludge inlet end of a sludge zone 9, the inlet end of a return sludge pipe 19 is connected with the sludge outlet end of the sludge zone 9, the inlet end of the return sludge pipe 19 is connected with the sludge inlet end of a front anoxic tank 1, the inlet of a residual sludge discharge pipe 26 is connected with a residual sludge discharge port of the sludge zone 9, the inlet end of a phosphorus removal dosing pipe 24 is arranged in a phosphorus removal medicament zone 8, the outlet end of the phosphorus removal dosing pipe 24 is arranged in the rear aerobic tank 6, a reflux pump 21 is arranged in the aerobic tank 4, the outlet end of the reflux.
The front combined biochemical pool is divided into a left cavity and a right cavity by a front main pool body through a longitudinal main partition plate, the left cavity forms an aerobic pool 4, the right cavity is divided into a front cavity and a rear cavity through a transverse partition plate, the rear cavity forms a middle anoxic pool 3, the front cavity is divided into four cavities through a transverse partition plate and a longitudinal partition plate, and the four cavities respectively form a front anoxic pool 1, an anaerobic pool 2, a rear anoxic pool 5 and a rear aerobic pool 6;
the combined biochemical pool at the rear part is divided into a left cavity and a right cavity by a main pool body at the rear part through a longitudinal total partition plate, the left cavity forms an aerobic pool 4, the right cavity is divided into a front cavity and a rear cavity through a transverse partition plate, the front cavity forms a middle anoxic pool 3, the rear cavity is divided into four cavities through a transverse partition plate and a longitudinal partition plate, and the four cavities respectively form a front anoxic pool 1, an anaerobic pool 2, a rear anoxic pool 5 and a rear aerobic pool 6.
The back baffle that is located a total cell body in the place ahead is the baffle for sharing with the preceding baffle that is located a total cell body in rear, and two heavy ponds 11 are circular cell body, and the right baffle that is located a total cell body in the place ahead is tangent with two circular baffles that sink pond 11 and arranges, and the right baffle that is located a total cell body in rear is tangent with two circular baffles that sink pond 11 and arranges, and two circular baffles that sink pond 11 are outer from arranging.
The aerobic tank 4 is provided with a snakelike water channel connected end to end, and the reflux pump 21 is positioned at the tail end of the snakelike water channel.
The method for sewage treatment by using the combined sewage treatment system comprises the following steps:
a. after sewage enters the coarse grating, the water inlet pump room, the fine grating and the aeration grit chamber from a water inlet pipe of the water inlet pump room in sequence, the sewage enters the front anoxic tank 1, the anaerobic tank 2, the middle anoxic tank 3 and the rear anoxic tank 5 through branch pipes connected in parallel on a water inlet main pipe 12 of the biochemical tank, and the flow rate and the flow of each branch pipe are controlled through a flow meter 22 and a flow regulating valve 23;
b. sewage flows through a front anoxic tank 1, an anaerobic tank 2 and a middle anoxic tank 3 in sequence and enters an aerobic tank 4, the sewage is aerated and oxygenated in the aerobic tank 4 through an aeration pipe 14, and dissolved oxygen concentration along the way is measured by an oxygen dissolving instrument 13 distributed along the way; controlling the dissolved oxygen gradient at the head end and the tail end of the aerobic tank 4, and after the sewage flows into the anoxic tank 5, further denitrifying the carbon source in the sewage and the carbon source conveyed by the carbon source dosing pipe 15 in the anoxic tank 5 by utilizing water inflow distribution;
c. the sewage at the tail end of the aerobic tank 4 is conveyed back to the anoxic tank 3 through a nitrifying liquid return pipe 20 by a return pump 21 for denitrification;
d. the carbon source in the carbon source medicament area 7 is respectively conveyed to the rear anoxic tank 5 and the middle anoxic tank 3 through a first carbon source medicament adding pipe 15 and a second carbon source medicament adding pipe 16; the phosphorus removal agent area 8 respectively adds phosphorus removal agents into the backward aerobic tank 6 through a phosphorus removal agent adding pipe 24;
e. the sewage in the rear aerobic tank 6 is input into a secondary sedimentation tank 11 through a communicating pipe 17, the sludge precipitated in the secondary sedimentation tank 11 enters a sludge area 9 through a sludge discharge pipe 18, part of the sludge in the sludge area 9 is conveyed to the front anoxic tank 1 through a sludge return pipe 19, and the sludge area 9 conveys the residual sludge to a subsequent sludge treatment structure through a residual sludge discharge pipe 26; the supernatant in the secondary sedimentation tank 11 overflows to the effluent area 10 and is lifted up to the subsequent structures by a fresh water lift pump 27 through a fresh water delivery pipe 28.
In the step b, if the aerobic tank 4 adopts the structure shown in the embodiment 1, the dissolved oxygen in the linear area 4.1 (i.e. the head end of the aerobic tank 4) of the aerobic tank is controlled to be 2-4 mg/L, and the dissolved oxygen concentration in the bent area 4.2 (i.e. the tail end of the aerobic tank 4) of the aerobic tank is controlled to be 1-1.5 mg/L.
In the step b, if the aerobic tank 4 adopts the structure shown in the embodiment 2, the dissolved oxygen at the head end of the serpentine water channel (i.e. the head end of the aerobic tank 4) is controlled to be 2-4 mg/L, and the dissolved oxygen at the tail end of the serpentine water channel (i.e. the tail end of the aerobic tank 4) is controlled to be 1-1.5 mg/L.
In the step d, the carbon source agent is glacial acetic acid or sodium acetate.
In the step d, the dephosphorization agent is polymeric aluminum ferric sulfate or polymeric aluminum chloride.
The utility model discloses in, two sets of around the combination formula biochemical pond is set to symmetrically, and sewage connects in parallel respectively and enters into in preceding oxygen deficiency pond 1, anaerobism pond 2, well oxygen deficiency pond 3, the back oxygen deficiency pond 5 from biochemical pond inlet manifold 12. Wherein a small part of sewage enters the front anoxic tank 1 to perform anoxic action, a large part of sewage enters the anaerobic tank 2 to perform anaerobic phosphorus release reaction, a small part of sewage directly enters the middle anoxic tank 3 and the rear anoxic tank 5, and a natural carbon source contained in the inlet water is used for supplementing a carbon source required by denitrification in the tanks, so that the amount of an external carbon source is saved.
The sewage flows through a front anoxic tank 1 (for denitrification reaction), an anaerobic tank 2 (for anaerobic phosphorus release) and a middle anoxic tank 3 (for denitrification reaction) in sequence, and then enters an aerobic tank 4 (for organic matter degradation, nitrification reaction and aerobic phosphorus absorption reaction), the sewage is aerated and oxygenated in the aerobic tank 4 through an aerator pipe 14, the aerobic tank 4 is divided into an aerobic tank linear area 4.1 and an aerobic tank bending area 4.2 on the plane, the opening number of the aerator pipe and the air volume of the aerator pipe are controlled through a measurement-feedback-regulation mechanism, so that the linear area 4.1 and the bending area 4.2 form dissolved oxygen gradient, and the dissolved oxygen in the aerobic tank linear area 4.1 is controlled at 2-4 mg/L, thereby being beneficial to the full degradation and nitrification of organic matters by microorganisms. The dissolved oxygen concentration of the aerobic tank bending area 4.2 is controlled to be 1-1.5mg/L, on one hand, the maintenance of the anoxic environment in the anoxic area 5 after the rear section is facilitated, on the other hand, the sewage of the aerobic tank bending area 4.2 contains a large amount of nitrifying liquid and needs to be conveyed back to the anoxic tank 3 through the nitrifying liquid return pipe 20 for denitrification, and the lower dissolved oxygen concentration is also more favorable for the maintenance of the anoxic environment of the anoxic tank 3.
After sewage flows into the rear anoxic tank 5 from the aerobic tank bending area 4.2, further denitrifying and denitrifying the sewage in the anoxic tank 5 by utilizing a carbon source in the sewage distributed by water inflow and the carbon source conveyed by the carbon source dosing pipe 15 in the anoxic tank 5;
the sewage in the rear aerobic tank 6 is input into the secondary sedimentation tank 11 through the communicating pipe 17 for sludge-water separation. Sludge precipitated in the secondary sedimentation tank 11 enters a sludge area 9 through a sludge discharge pipe 19, part of sludge in the sludge area 10 is conveyed into the front anoxic tank 1 through a sludge return pipe 19 to supplement the sludge concentration in the front anoxic tank 1, and an anoxic environment is formed under the action of equipment such as a stirrer in the tank; the supernatant in the secondary sedimentation tank 11 overflows to the water outlet area 10, the water outlet area 10 is similar to an irregularly-shaped pump room, and the water is lifted to a subsequent structure through a clear water conveying pipe 28 by a clear water lifting pump 27.
When the operation finds that the available carbon source in the sewage is less and the denitrification efficiency is lower, the carbon source in the available carbon source medicament area 7 is respectively conveyed into the rear anoxic tank 5 and the middle anoxic tank 3 through the first carbon source medicament adding pipe 15 and the second carbon source medicament adding pipe 16 by the carbon source adding pump to supplement the carbon source required by the denitrification; when the total phosphorus of the effluent cannot stably reach the standard, chemical phosphorus removal is needed, a phosphorus removal agent region 8 respectively adds a phosphorus removal agent into a backward aerobic tank 6 through a phosphorus removal agent adding pipe 24, the chemical agent and phosphate in water perform chemical precipitation reaction in a secondary precipitation tank, and the phosphate in the sewage is removed to ensure that the quality of the effluent reaches the standard.
The two groups of combined biochemical tanks share one carbon source reagent area, one phosphorus removal reagent area, one sludge reflux area and one effluent lifting area, and the combined biochemical tanks are compact and reasonable in arrangement structure and small in occupied area.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. The utility model provides a modular sewage treatment system which characterized by: the device comprises a front combined biochemical tank and a rear combined biochemical tank, wherein each combined biochemical tank comprises a front anoxic tank (1), an anaerobic tank (2), a middle anoxic tank (3), an aerobic tank (4), a rear anoxic tank (5), a rear aerobic tank (6) and a secondary sedimentation tank (11) which are sequentially arranged along the sewage conveying direction; a carbon source reagent area (7) is arranged between a rear aerobic tank (6) and a secondary sedimentation tank (11) in the front combined biochemical tank, and a phosphorus removal reagent area (8) is arranged between the rear aerobic tank (6) and the secondary sedimentation tank (11) in the rear combined biochemical tank; a sludge area (9) is arranged between the two anoxic tanks (3) and the two secondary sedimentation tanks (11); a water outlet area (10) is arranged behind the two secondary sedimentation tanks (11), a clear water lifting pump (27) is arranged in the water outlet area (10), and a clear water conveying pipe (28) is connected to the outlet of the clear water lifting pump (27);
a front anoxic tank (1), an anaerobic tank (2), a middle anoxic tank (3) and an anoxic tank (5) are connected in parallel in a biochemical tank water inlet main pipe (12) through branch pipes, a flow meter (22) and a flow regulating valve (23) are installed on the branch pipes, a plurality of dissolved oxygen meters (13) and aeration pipes (14) are arranged at intervals in an aerobic tank (4) along the sewage conveying direction, the inlet end of a first carbon source dosing pipe (15) and the inlet end of a second carbon source dosing pipe (16) are both arranged in a carbon source medicament area (7), the outlet end of the first carbon source dosing pipe (15) is arranged in a rear anoxic tank (5), and the outlet end of the second carbon source dosing pipe (16) is arranged in the middle anoxic tank (3);
the inlet end of a communicating pipe (17) is connected with the sludge outlet end of a rear aerobic tank (6), the outlet end of the communicating pipe (17) is connected with the sludge inlet end of a secondary sedimentation tank (11), the inlet end of a sludge discharge pipe (18) is connected with the sludge outlet end of the secondary sedimentation tank (11), the outlet end of the sludge discharge pipe (18) is connected with the sludge inlet end of a sludge area (9), the inlet end of a return sludge pipe (19) is connected with the sludge outlet end of the sludge area (9), the inlet end of the return sludge pipe (19) is connected with the sludge inlet end of a front anoxic tank (1), the inlet end of a residual sludge discharge pipe (26) is connected with the residual sludge discharge port of the sludge area (9), the inlet end of a phosphorus removal dosing pipe (24) is arranged in a phosphorus removal medicament area (8), the outlet end of the phosphorus removal dosing pipe (24) is arranged in the rear aerobic tank (6), a return pump (21) is arranged at the tail end of the aerobic tank (4), and the outlet, the outlet end of the nitrifying liquid return pipe (20) is connected into the anoxic tank (3).
2. The combined sewage treatment system of claim 1, wherein: the front combined biochemical pool is divided into three cavities by a front main pool body through two transverse division plates, the middle cavity forms an aerobic pool straight line region (4.1), the front cavity is divided into an aerobic pool bending region (4.2), a rear anoxic pool (5) and a rear aerobic pool (6) through two longitudinal division plates, and the rear cavity is divided into a front anoxic pool (1), an anaerobic pool (2) and a middle anoxic pool (3) through two longitudinal division plates;
the combined biochemical pool is characterized in that a main pool body positioned at the rear part is separated by two transverse separation plates to form three cavities, the middle cavity forms an aerobic pool straight line region (4.1), the front cavity is separated by two longitudinal separation plates to form a front anoxic pool (1), an anaerobic pool (2) and a middle anoxic pool (3), and the rear cavity is separated by two longitudinal separation plates to form an aerobic pool bending region (4.2), a rear anoxic pool (5) and a rear aerobic pool (6).
3. The combined sewage treatment system of claim 2, wherein: the rear partition plate of a main tank body positioned in front and the front partition plate of a main tank body positioned at the rear are shared partition plates, the two-stage sedimentation tank (11) is a circular tank body, the right partition plate of a main tank body positioned in front and the circular partition plate of the two-stage sedimentation tank (11) are arranged in a tangent mode, the right partition plate of a main tank body positioned at the rear and the circular partition plate of the two-stage sedimentation tank (11) are arranged in a tangent mode, and the circular partition plates of the two-stage sedimentation tank (11) are arranged in a tangent mode.
4. The combined sewage treatment system of claim 2, wherein: the aerobic tank (4) is formed by connecting an aerobic tank straight line area (4.1) and an aerobic tank bending area (4.2), the aerobic tank bending area (4.2) is positioned at the front end of the aerobic tank straight line area (4.1), and the reflux pump (21) is arranged at the tail end of the aerobic tank bending area (4.2).
5. The combined sewage treatment system of claim 1, wherein: the front combined biochemical pool is divided into a left cavity and a right cavity by a front total pool body through a longitudinal total partition plate, the left cavity forms an aerobic pool (4), the right cavity is divided into a front cavity and a rear cavity through a transverse partition plate, the rear cavity forms a middle anoxic pool (3), the front cavity is divided into four cavities through a transverse partition plate and a longitudinal partition plate, and the four cavities respectively form a front anoxic pool (1), an anaerobic pool (2), a rear anoxic pool (5) and a rear aerobic pool (6);
a combination formula biochemical pond that is located the rear is separated into two channels of cavitys about through a vertical total baffle by a total cell body that is located the rear, and left side cavity forms good oxygen pond (4), and two cavitys around the right cavity passes through a horizontal division board and separates into, and preceding cavity forms well oxygen deficiency pond (3), and four cavitys are separated into through a horizontal division board and a vertical division board to back cavity, and four cavitys form preceding oxygen deficiency pond (1), anaerobism pond (2), back oxygen deficiency pond (5) and back good oxygen pond (6) respectively.
6. The combined sewage treatment system of claim 5, wherein: the rear partition plate of a main tank body in front and the front partition plate of a main tank body in rear are shared partition plates, two-stage settling tanks (11) are circular tank bodies, the right partition plate of a main tank body in front and the circular partition plate of two-stage settling tanks (11) are arranged in a tangent mode, the right partition plate of a main tank body in rear and the circular partition plate of two-stage settling tanks (11) are arranged in a tangent mode, and the circular partition plates of two-stage settling tanks (11) are arranged in an outward-separated mode.
7. The combined sewage treatment system of claim 5, wherein: the aerobic tank (4) is provided with a snakelike water channel connected end to end, and the reflux pump (21) is positioned at the tail end of the snakelike water channel.
Priority Applications (1)
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| CN110304799A (en) * | 2019-08-05 | 2019-10-08 | 无锡市政设计研究院有限公司 | Combined sewage treatment system and method |
| CN110304799B (en) * | 2019-08-05 | 2024-07-02 | 华昕设计集团有限公司 | Combined sewage treatment system and method |
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