CN211999015U - Improved UCT coupling biological rotating disc sewage treatment system for black and odorous water body - Google Patents
Improved UCT coupling biological rotating disc sewage treatment system for black and odorous water body Download PDFInfo
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- CN211999015U CN211999015U CN201922433960.8U CN201922433960U CN211999015U CN 211999015 U CN211999015 U CN 211999015U CN 201922433960 U CN201922433960 U CN 201922433960U CN 211999015 U CN211999015 U CN 211999015U
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Abstract
The utility model discloses an improved UCT coupling biological rotating disc sewage treatment system aiming at black and odorous water, which comprises a hydrolysis acidification pool, a denitrification pool, an anoxic pool, a CASS pool, a biological rotating disc pool, a flocculation sedimentation pool and a canvas filter pool in sequence according to the sewage treatment process; the utility model discloses utilize the combination of denitrification pond and oxygen deficiency pond to guarantee that the nitrate consumes completely, utilize CASS technology and biological rotating disk coupling to form CASS-biological rotating disk technology simultaneously and ensure the effect of nitrogen and phosphorus removal, combine the advantage of two kinds of technologies, the shortcoming is complementary, makes its processing that is suitable for the black and odorous water body of intaking in succession, the biological flocculation effect and the nitrogen and phosphorus removal effect of reinforcing suspended solid in the black and odorous water body.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to an improvement type UCT coupling biological rotating disc sewage treatment system to black and odorous water body.
Background
With the implementation and popularization of the 'first class A' standard of the discharge Standard of pollutants for municipal wastewater treatment plants (GB18918-2002), nitrogen and phosphorus removal gradually becomes a core competitive technology in the field of wastewater treatment. Aiming at the sewage which is widely existed in cities with good biodegradability, low COD, large chroma and large smell degree, such as black and odorous water body, the generation process mainly comprises the steps that the sewage discharge of the urban river exceeds standard, and exogenous organic matters consume dissolved oxygen to form an anoxic environment, so that anaerobic bacteria are propagated to generate a large amount of H2Malodorous gases such as S, ammonia and organic sulfides, and black substances such as FeS and MnS; and due to the pollution of the bottom mud in the river channel, surface runoff, insufficient power of the river channel water body and the like, the black and odorization phenomenon of the urban river channel sewage is obvious.
Aiming at the current situation that black and odorous water bodies have great influence on urban environmental landscapes, sewage treatment processes with stability, high efficiency and high cost performance are needed, and the characteristics of black and odorous sewage are limited, most biochemical treatment processes cannot perform effective and stable nitrogen and phosphorus removal, and the biological rotating disk repeatedly contacts sewage in a tank and oxygen in air through a microbial film growing on the surface of the disk body, so that the sewage continuously operates in an aerobic state and an anaerobic state, and the nitrogen and phosphorus removal effect is achieved. Although the effect of degrading COD is better, the effect of removing total phosphorus and odor is poorer, and the method is a part needing improvement in black and odorous sewage treatment engineering.
CASS (Cyclic Activated Sludge System) is a short name of a periodic cycle Activated Sludge method and is also called a cycle Activated Sludge process. The process is applied at first abroad, compared with the ICEAS process, the CASS process can improve the load by 1-2 times, the occupied land and the engineering investment are saved by nearly 30%, on the basis of a Sequencing Batch Reactor (SBR) process, a reaction tank is designed into two parts along the length direction of the tank, the front part is a biological selection area also called a pre-reaction area, the rear part is a main reaction area, and the rear part of the main reaction area is provided with a liftable automatic water skimming device. The aeration, sedimentation, drainage and other processes of the whole process are periodically and circularly operated in the same tank body, so that a secondary sedimentation tank and a sludge reflux system of the conventional activated sludge method are saved, and meanwhile, water can be continuously fed and intermittently drained. But the unsteady state of the operation process, the liquid level in the CASS tank is the highest when the drainage begins in each working period, the liquid level is the lowest when the drainage is finished, the variation amplitude of the liquid level depends on the drainage ratio, and the drainage ratio is related to the concentration of the treated wastewater, the discharge standard, the difficulty degree of biodegradation and the like. The mix volume and matrix concentration in the CASS tank were varied, and matrix degradation was unstable.
To sum up, the problem that has in the black smelly sewage biochemical treatment process at present is:
firstly, the method comprises the following steps: the black and odorous water has more chroma and indissolvable substances, and is difficult to directly reach the standard after being directly treated;
secondly, the method comprises the following steps: the prior biological rotating disc process has poor denitrification and dephosphorization effects;
thirdly, the method comprises the following steps: the operation effect of the existing CASS process is unstable, and the expected effect is difficult to achieve in engineering; fourthly: the existing combined process is not perfect for the combined process of nitrogen and phosphorus removal, and the single nitrogen and phosphorus removal is difficult to achieve better nitrogen and phosphorus removal effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's problem, providing one kind to black smelly sewage treatment effect good, the stable kind of system operation is to black smelly water's improvement type UCT coupling biological rotating disc sewage treatment system.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that:
an improved UCT coupling biological rotating disc sewage treatment system for black and odorous water bodies sequentially comprises a hydrolysis acidification pool, a denitrification pool, an anoxic pool, a CASS pool, a biological rotating disc pool, a flocculation sedimentation pool and a canvas filter pool according to a sewage treatment process; a water inlet is formed in the upper part of the side wall of one side of the water inlet end of the hydrolysis acidification tank; a first mixed liquid return pipe is arranged in the anoxic tank, a second mixed liquid return pipe is arranged in the biological rotating disk tank, and the first mixed liquid return pipe and the second mixed liquid return pipe are both connected with a first vertical water distribution pipe network arranged below a water inlet of the hydrolysis acidification tank; a supernatant return pipe is arranged at the water outlet end of the CASS tank and is connected with a second vertical water distribution pipe network arranged at the lower part of the side wall of the water inlet end of the denitrification tank; the device is characterized in that a first sludge return pipe is further arranged at the bottom of the CASS tank, a second sludge return pipe is arranged at the bottom of the canvas filter tank, the first sludge return pipe and the second sludge return pipe are connected with a sludge return branch pipe arranged on the upper portion of the side wall of the water inlet end of the denitrification tank, and a biological rotating disk is arranged in the biological rotating disk tank.
Preferably, an anticorrosive fine grid is arranged at a water inlet of the hydrolysis acidification tank, the installation angle of the anticorrosive fine grid is 45-80 degrees, spherical suspended filler is added into the hydrolysis acidification tank, a first overflow weir is arranged at the upper part of the outer side wall of the water outlet end of the hydrolysis acidification tank, and a first water guide pipe is arranged at the bottom of the first overflow weir.
Preferably, the denitrification tank is internally provided with sponge type suspended filler, the bottom of the denitrification tank is communicated with the anoxic tank, the upper part of the outer side wall of the water outlet end of the anoxic tank is provided with a second overflow weir, and the bottom of the second overflow weir is provided with a second water guide pipe.
Preferably, a first vertical partition plate is arranged on one side, close to the water inlet end, of the CASS tank, a notch is formed in the bottom of the first vertical partition plate, and the CASS tank is divided into a front-section buffer zone and a rear-section intermittent aeration zone by the first vertical partition plate; the intermittent aeration zone bottom sets up aeration equipment, the supernatant back flow pipe sets up in intermittent aeration zone, set up the suction pump on the supernatant back flow pipe, still set up the level gauge in the intermittent aeration zone, the lateral wall upper portion of CASS pond water outlet end sets up the third overflow weir, third overflow weir bottom sets up the third aqueduct.
Preferably, the outer wall of the biological rotating disc pool is provided with a solar heat-preservation and heat-insulation layer, the upper part of the outer side wall of the water outlet end of the biological rotating disc pool is provided with a fourth overflow weir, the bottom of the fourth overflow weir is provided with a fourth water guide pipe, and the upper end of the fourth water guide pipe is provided with a pipeline mixer.
Preferably, the flocculation sedimentation tank is divided into a mixing area at the front section and a sedimentation area at the rear section by a second vertical partition plate; and a stirring device is arranged in the mixing zone, a fifth overflow weir is arranged at the upper part of the outer side wall of the water outlet end of the settling zone, and a fifth water guide pipe is arranged at the bottom of the fifth overflow weir.
Preferably, a conical mud discharging plate is further arranged in the canvas filtering pool.
Preferably, the bottoms of the CASS tank, the flocculation sedimentation tank and the canvas filter tank are also provided with sludge discharge pipes.
The treatment process flow of the system comprises the following steps:
step S1: the sewage enters a hydrolytic acidification tank through a water inlet, insoluble particulate matters and scum contained in the sewage are removed through the filtration of an anticorrosive fine grid, and spherical suspended fillers in the hydrolytic acidification tank can ensure that the inside of the tank body maintains higher biomass, and mixed liquor which does not contain nitrate and flows back from an anoxic tank and mixed liquor which has extremely low nitrate content and flows back from a biological rotating disk tank are used for reducing the influence of the nitrate on microorganisms sensitive to the nitrate, such as phosphorus accumulating bacteria and the like in the hydrolytic acidification tank; the treated sewage overflows into a first overflow weir and enters a denitrification tank along a first water guide pipe at the bottom;
step S2: after the sewage enters a denitrification tank, carrying out a first-stage denitrification process by utilizing supernatant returned by the CASS tank; and the sludge returned by the CASS tank and the canvas filter tank is utilized to maintain the concentration of the sludge in the denitrification tank; sponge type suspension packing is utilized to ensure that higher biomass is maintained in the denitrification tank; then the sewage enters an anoxic tank from the bottom of the denitrification tank;
step S3: the sewage flows into the anoxic tank, is treated by the anoxic tank and overflows into a second overflow weir, and then enters into the CASS tank along a second water guide pipe at the bottom;
step S4: the sewage firstly enters a buffer zone at the front section of the CASS tank and then enters an intermittent aeration zone from a notch at the bottom of the first vertical partition plate; an aeration device in the intermittent aeration area performs intermittent aeration, and a liquid level meter and a water pump on a supernatant liquid return pipe are matched with each other to intermittently pump supernatant liquid out and return the supernatant liquid to a denitrification tank; forming four operation stages of aeration, sedimentation, water decanting and idling in the CASS tank, controlling the time to achieve second-stage self denitrification and first-stage dephosphorization under the aerobic-anaerobic-anoxic condition in the CASS tank, overflowing the treated sewage into a third overflow weir, and entering a biological rotating disc tank along a third water guide pipe at the bottom;
step S5: sewage is in a biological rotating disc tank, third-stage self denitrification and second-stage phosphorus removal under aerobic-anaerobic-anoxic conditions are achieved in the same tank body by utilizing the difference of spatial positions of the biological rotating disc after film hanging, the treated sewage overflows into a fourth overflow weir and enters a mixing area of a flocculation sedimentation tank along a fourth water guide pipe at the bottom;
step S6: sewage is fully mixed with a flocculating agent and the effluent of the biological rotating disc tank at the upper end of a fourth water guide pipe through a pipeline mixer, then overflows into a precipitation zone, is subjected to third-stage phosphorus removal by utilizing chemical phosphorus removal, and supernatant liquid after being precipitated in the precipitation zone overflows into a fifth overflow weir and enters into a canvas filter tank along a fifth water guide pipe at the bottom;
step S7: sewage filters once more in the canvas filtering ponds and deposits, and mud is collected to the toper mud discharging plate, and the supernatant is discharge to reach standard after deposiing, and the unnecessary mud of CASS pond, flocculation and precipitation pond and canvas filtering ponds bottom is regularly discharged by the mud pipe.
The utility model has the advantages that:
firstly, the method comprises the following steps: the buffer zone and the intermittent aeration zone are arranged in the CASS tank, so that the water quality and the water quantity of the sewage can be buffered, and the impact of continuous water inflow on the sludge of the rear tank body is reduced;
secondly, the method comprises the following steps: the solar heat-insulating layer on the outer wall of the biological rotating disc pool ensures that the biological rotating disc pool can normally run in winter;
thirdly, the method comprises the following steps: the characteristics of clear effluent of the CASS tank and continuous water inflow are utilized to reduce the pressure of a subsequent filtering system, enhance the biological flocculation effect of a biochemical system on the black and odorous water body, achieve better effect in the aspects of decolorization and deodorization, and preliminarily solve the problems of high chroma and indissolvable substances and difficult direct treatment to reach the standard in the existing black and odorous sewage biochemical treatment process; on the other hand, the defects of high energy consumption of the CASS process aeration time and poor impact resistance of a CASS activated sludge process are overcome by utilizing the characteristics of large biomass, stable treatment, less energy consumption and capability of automatically supplementing dissolved oxygen of the biological rotating disk, the biological rotating disk is a complementary organic combined process, and meanwhile, the biological rotating disk is low in dissolved oxygen of sewage, has small influence on the concentration of nitrate when the sewage flows back to a hydrolysis acidification tank, has large influence on the growth of phosphorus accumulating bacteria, and solves the problem of poor denitrification and dephosphorization effect of the biological rotating disk process in the existing black and odorous sewage hydration treatment process;
fourthly: the improved UCT can reduce the influence of nitrate on the anaerobic tank, and the anaerobic tank is replaced by a hydrolysis acidification tank by combining the characteristics of the black and odorous water body, and meanwhile, the complete consumption of the nitrate is ensured by using the combination of a denitrification tank and an anoxic tank; the CASS process and the biological rotating disc are coupled to form a CASS-biological rotating disc process, so that the denitrification and dephosphorization effect is ensured, the advantages and the disadvantages of the two processes are combined and complemented, the continuous-inflow black and odorous water treatment process is suitable for treating the black and odorous water body, and the problems that the operation effect of the existing CASS process is unstable and the expected effect is difficult to achieve in engineering in the existing black and odorous sewage biochemical treatment process are solved; the biological flocculation effect and the nitrogen and phosphorus removal effect of suspended matters in the black and odorous water body are enhanced, the dosing flocculation effect of a subsequent flocculation and sedimentation tank is enhanced, phosphorus is further removed through the flocculation and sedimentation tank, and the load of a subsequent canvas filter tank is reduced; further solves the problems that the existing black and odorous sewage biochemical treatment process has more chroma and indissolvable substances and is difficult to directly reach the standard by direct treatment, and the whole process section utilizes a three-stage denitrification and three-stage dephosphorization process (biological dephosphorization and chemical dephosphorization) to ensure that the effluent is stable, thereby solving the problems that the existing combined process in the existing black and odorous sewage biochemical treatment process is incomplete in denitrification and dephosphorization combined process, and the single denitrification and dephosphorization is difficult to achieve better denitrification and dephosphorization effect and equipment service cycle.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the present invention.
In the figure: 1 is a hydrolytic acidification tank, 1.1 is a water inlet, 1.2 is a first vertical water distribution pipe network, 1.3 is a corrosion-resistant fine grid, 1.4 is a spherical suspended filler, 2 is a denitrification tank, 2.1 is a second vertical water distribution pipe network, 2.2 is a sludge return branch pipe, 2.3 is a sponge-type suspended filler, 3 is an anoxic tank, 3.1 is a first mixed liquid return pipe, 4 is a CASS tank, 4.1 is a supernatant return pipe, 4.2 is a first sludge return pipe, 4.3 is a first vertical clapboard, 4.4 is a buffer zone, 4.5 is an intermittent aeration zone, 5 is a biological rotating disc tank, 5.1 is a second mixed liquid return pipe, 5.2 is a biological rotating disc, 6 is a flocculation sedimentation tank, 6.1 is a second vertical clapboard, 6.2 is a mixing zone, 6.3 is a sedimentation zone, 7 is a canvas filter tank, 7.1 is a first sludge return pipe, 7.2 is a conical discharge plate, 8.1 is a first weir, 8.1 is a second overflow pipe, 9.9 is a second weir, and 1.9 is a second overflow weir, 10 is a third overflow weir, 10.1 is a third water duct, 11 is a fourth overflow weir, 11.1 is a fourth water duct, 11.2 is a pipe mixer, 12 is a fifth overflow weir, 12.1 is a fifth water duct, 13 is a suction pump, and 14 is a level gauge.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Example 1:
an improved UCT coupling biological rotating disc sewage treatment system for black and odorous water bodies sequentially comprises a hydrolysis acidification tank 1, a denitrification tank 2, an anoxic tank 3, a CASS tank 4, a biological rotating disc tank 5, a flocculation sedimentation tank 6 and a canvas filter tank 7 according to a sewage treatment process; a water inlet 1.1 is formed in the upper part of the side wall of one side of the water inlet end of the hydrolysis acidification tank 1; a first mixed liquid return pipe 3.1 is arranged in the anoxic tank 3, a second mixed liquid return pipe 5.1 is arranged in the biological rotating disc tank 5, and the first mixed liquid return pipe 3.1 and the second mixed liquid return pipe 5.1 are both connected with a first vertical water distribution pipe network 1.2 arranged below a water inlet 1.1 of the hydrolytic acidification tank 1; a supernatant liquid return pipe 4.1 is arranged at the water outlet end of the CASS tank 4, and the supernatant liquid return pipe 4.1 is connected with a second vertical water distribution pipe network 2.1 arranged at the lower part of the side wall of the water inlet end of the denitrification tank 2; the device is characterized in that a first sludge return pipe 4.2 is further arranged at the bottom of the CASS tank 4, a second sludge return pipe 7.1 is arranged at the bottom of the canvas filter tank 7, the first sludge return pipe 4.2 and the second sludge return pipe 7.1 are both connected with a sludge return branch pipe 2.2 arranged on the upper portion of the side wall of the water inlet end of the denitrification tank 2, and a biological rotating disc 5.2 is arranged in the biological rotating disc tank 5.
Preferably, an anticorrosive fine grid 1.3 is arranged at a water inlet of the hydrolysis acidification tank 1, the installation angle of the anticorrosive fine grid 1.3 is 45-80 degrees, spherical suspended filler 1.4 is added into the hydrolysis acidification tank 1, a first overflow weir 8 is arranged at the upper part of the outer side wall of the water outlet end of the hydrolysis acidification tank 1, and a first water guide pipe 8.1 is arranged at the bottom of the first overflow weir 8.
Preferably, the sponge type suspended filler 2.3 is arranged in the denitrification tank 2, the bottom of the denitrification tank 2 is communicated with the anoxic tank 3, the second overflow weir 9 is arranged on the upper part of the outer side wall of the water outlet end of the anoxic tank 3, and the second water guide pipe 9.1 is arranged at the bottom of the second overflow weir 9.
Preferably, a first vertical partition plate 4.3 is arranged on one side of the CASS tank 4 close to the water inlet end, a notch (not shown in the figure) is arranged at the bottom of the first vertical partition plate 4.3, and the CASS tank 4 is divided into a front-section buffer zone 4.4 and a rear-section intermittent aeration zone 4.5 by the first vertical partition plate 4.3; an aeration device (not shown in the figure) is arranged at the bottom of the intermittent aeration zone 4.5, the supernatant return pipe 4.1 is arranged in the intermittent aeration zone 4.5, a water pump 13 is arranged on the supernatant return pipe 4.1, a liquid level meter 14 is also arranged in the intermittent aeration zone 4.5, a third overflow weir 10 is arranged at the upper part of the outer side wall of the water outlet end of the CASS tank 4, and a third water guide pipe 10.1 is arranged at the bottom of the third overflow weir 10; the aeration device is the prior art, mainly comprises a micropore aeration pipe and the like, and is not described again here.
Preferably, the outer wall of the biological rotating disk pond 5 is provided with a solar thermal insulation layer (not shown in the figure), the upper part of the outer side wall of the water outlet end of the biological rotating disk pond 5 is provided with a fourth overflow weir 11, the bottom of the fourth overflow weir 11 is provided with a fourth water guide pipe 11.1, the upper end of the fourth water guide pipe 11.1 is provided with a pipeline mixer 11.2, and the outer wall of the biological rotating disk pond 5 is provided with the solar thermal insulation layer, which is the prior art and is not described herein again.
Preferably, the flocculation sedimentation tank 6 is internally divided into a front-section mixing zone 6.2 and a rear-section sedimentation zone 6.3 by a second vertical partition plate 6.1; a stirring device (not shown) is arranged in the mixing zone 6.2, a fifth overflow weir 12 is arranged at the upper part of the outer side wall of the water outlet end of the settling zone 6.3, and a fifth water guide pipe 12.1 is arranged at the bottom of the fifth overflow weir 12.
Preferably, a conical mud discharging plate 7.2 is further arranged in the canvas filter tank 7.
Preferably, the bottoms of the CASS tank 4, the flocculation sedimentation tank 6 and the canvas filter tank 7 are also provided with a sludge discharge pipe (not shown in the figure).
The treatment process flow of the system comprises the following steps:
step S1: sewage enters a hydrolytic acidification tank 1 through a water inlet 1.1, insoluble particulate matters and scum contained in the sewage are removed through filtering by an anticorrosive fine grid 1.3, spherical suspended filler 1.4 in the hydrolytic acidification tank 1 can ensure that the inside of the tank body maintains higher biomass, and mixed liquor which does not contain nitrate and flows back from an anoxic tank 3 and mixed liquor which has extremely low nitrate content and flows back from a biological rotating disk tank 5 are used for reducing the influence of nitrate on microorganisms which are sensitive to the nitrate and comprise phosphorus bacteria and the like in the hydrolytic acidification tank 1; the treated sewage overflows into a first overflow weir 8 and enters a denitrification tank 2 along a first water guide pipe 8.1 at the bottom;
step S2: after the sewage enters the denitrification tank 2, the supernatant returned by the CASS tank 4 is utilized to carry out the first-stage denitrification process; and the sludge returned by the CASS tank 4 and the canvas filter tank 7 is utilized to maintain the sludge concentration in the denitrification tank 2; sponge type suspended filler 2.3 is utilized to ensure that higher biomass is maintained in the denitrification tank 2; then the sewage enters an anoxic tank 3 from the bottom of the denitrification tank 2;
step S3: the sewage flows into the anoxic tank 3, is treated by the anoxic tank 3 and overflows into a second overflow weir 9, and then enters the CASS tank 4 along a second water guide pipe 9.1 at the bottom;
step S4: the sewage firstly enters a buffer zone 4.4 at the front section of the CASS tank 4 and then enters an intermittent aeration zone 4.5 from a notch at the bottom of a first vertical clapboard 4.3; an aeration device in the intermittent aeration zone 4.5 performs intermittent aeration, and a liquid level meter 14 and a water pump 13 on a supernatant liquid return pipe 4.1 are matched with each other to intermittently pump out supernatant liquid and return the supernatant liquid to the denitrification tank 2; four operation stages of aeration, sedimentation, water decanting and idling are formed in the CASS tank 4, the second-stage self denitrification and the first-stage dephosphorization under the aerobic-anaerobic-anoxic condition are achieved in the CASS tank 4 by utilizing the time control, the treated sewage overflows into a third overflow weir 10 and enters into the biological rotating disc tank 5 along a third water guide pipe 10.1 at the bottom; the PLC control system can be used for realizing the mutual matching of the liquid level meter 14 and the water suction pump 13 for pumping water, and the intermittent aeration of the aeration device is realized, which is the prior art and is not described in detail herein.
Step S5: in the biological rotating disc tank 5, the third-stage self denitrification and the second-stage dephosphorization under the aerobic-anaerobic-anoxic condition are achieved in the same tank body by utilizing the difference of spatial positions of the biological rotating disc 5.2 after film hanging, the treated sewage overflows into a fourth overflow weir 11 and enters a mixing zone 6.2 of the flocculation sedimentation tank 6 along a fourth aqueduct 11.1 at the bottom;
step S6: sewage is fully mixed with a flocculating agent and the effluent of the biological rotating disc tank 5 at the upper end of a fourth water guide pipe 11.1 through a pipeline mixer 11.2, overflows into a settling zone 6.3, is settled in the settling zone 6.3, and then overflows into a fifth overflow weir 12 and enters into a canvas filter tank 7 along a fifth water guide pipe 12.1 at the bottom;
step S7: sewage filters once more in canvas filtering ponds 7 and deposits, and mud is collected to toper type mud discharging plate 7.2, and the supernatant is discharge up to standard after the sediment, and the unnecessary mud of CASS pond 4, flocculation and precipitation pond 5 and 7 bottoms of canvas filtering ponds is regularly discharged by the mud pipe.
The method comprises the following steps that inflow water is filtered through an anticorrosive fine grid 1.3, scum is fed into a hydrolytic acidification tank 1 to react for 2 hours and then fed into a denitrification tank 2 through a first overflow weir 8, supernatant flowing back from a CASS tank 4 runs for 3 hours in the denitrification tank 2 to carry out a first-stage denitrification process, effluent from the denitrification tank 2 enters the bottom of an anoxic tank 3 from the bottom, the effluent flows into the CASS tank 4 through a second overflow weir 9 after reacting for 3 hours, the inflow water enters an intermittent aeration zone 4.5 after being buffered by a buffer zone 4.4, aeration is achieved under the dual action of aeration and water pumping by using a PLC control system for 1.5 hours, sedimentation is carried out for 1.5 hours, decanting water is carried out for 1.5 hours and the running time of idling for 1.5 hours, second-stage self denitrification and first-stage dephosphorization are carried out, and the effluent supernatant enters a biological rotating disk tank 5 through a third overflow weir 10; the third-stage self-denitrification and the second-stage dephosphorization are carried out in the biological rotating disc tank 5 through the biological rotating disc 5.2 self-oxygenation reaction for 4 hours, the effluent of the biological rotating disc tank enters a mixing zone 6.2 of the flocculation sedimentation tank 6 through a fourth overflow weir 11, the influent water is added with drugs and stirred for 1.5 hours, then the effluent is precipitated for 1 hour, the third-stage chemical dephosphorization effluent enters a canvas filtering tank 7 through a fifth overflow weir 12 and is filtered for 3 hours, and then the effluent is discharged.
Supernatant in the CASS tank 4 flows back to the denitrification tank 2 to carry out first-stage denitrification, mixed liquor in the biological rotating disc tank 5 and mixed liquor in the anoxic tank 3 automatically flow back to the hydrolytic acidification tank 1 to release phosphorus and absorb nutrient substances by using a pipeline liquid level difference, and sludge in the CASS tank 4 and the canvas filter tank 7 flows back to the denitrification tank 2 to supplement the concentration of microorganisms; and the phosphorus-rich sludge in the CASS tank 4, the chemical sludge in the flocculation sedimentation tank 6 and the residual sludge in the canvas filter tank 7 are discharged out through a sludge discharge pipe and then are subjected to pressure drying treatment.
The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides an improvement type UCT coupling biological rotating disc sewage treatment system to black smelly water which characterized in that: the sewage treatment device sequentially comprises a hydrolysis acidification tank, a denitrification tank, an anoxic tank, a CASS tank, a biological rotating disc tank, a flocculation sedimentation tank and a canvas filter tank according to a sewage treatment flow; a water inlet is formed in the upper part of the side wall of one side of the water inlet end of the hydrolysis acidification tank; a first mixed liquid return pipe is arranged in the anoxic tank, a second mixed liquid return pipe is arranged in the biological rotating disk tank, and the first mixed liquid return pipe and the second mixed liquid return pipe are both connected with a first vertical water distribution pipe network arranged below a water inlet of the hydrolysis acidification tank; a supernatant return pipe is arranged at the water outlet end of the CASS tank and is connected with a second vertical water distribution pipe network arranged at the lower part of the side wall of the water inlet end of the denitrification tank; the device is characterized in that a first sludge return pipe is further arranged at the bottom of the CASS tank, a second sludge return pipe is arranged at the bottom of the canvas filter tank, the first sludge return pipe and the second sludge return pipe are connected with a sludge return branch pipe arranged on the upper portion of the side wall of the water inlet end of the denitrification tank, and a biological rotating disc is arranged in the biological rotating disc tank.
2. The improved UCT-coupled biological rotating disc sewage treatment system aiming at black and odorous water body according to claim 1, wherein: an anticorrosive fine grid is arranged at a water inlet of the hydrolysis acidification tank, the installation angle of the anticorrosive fine grid is 45-80 degrees, spherical suspended filler is added into the hydrolysis acidification tank, a first overflow weir is arranged at the upper part of the outer side wall of the water outlet end of the hydrolysis acidification tank, and a first water guide pipe is arranged at the bottom of the first overflow weir.
3. The improved UCT-coupled biological rotating disc sewage treatment system aiming at black and odorous water body according to claim 1, wherein: the denitrification reactor is characterized in that sponge type suspended fillers are arranged in the denitrification tank, the bottom of the denitrification tank is communicated with the anoxic tank, a second overflow weir is arranged on the upper portion of the outer side wall of the water outlet end of the anoxic tank, and a second water guide pipe is arranged at the bottom of the second overflow weir.
4. The improved UCT-coupled biological rotating disc sewage treatment system aiming at black and odorous water body according to claim 1, wherein: a first vertical partition plate is arranged on one side, close to a water inlet end, in the CASS tank, a notch is formed in the bottom of the first vertical partition plate, and the CASS tank is divided into a front-section buffer zone and a rear-section intermittent aeration zone by the first vertical partition plate; the intermittent aeration zone bottom sets up aeration equipment, the supernatant back flow pipe sets up in intermittent aeration zone, set up the suction pump on the supernatant back flow pipe, still set up the level gauge in the intermittent aeration zone, the lateral wall upper portion of CASS pond water outlet end sets up the third overflow weir, third overflow weir bottom sets up the third aqueduct.
5. The improved UCT-coupled biological rotating disc sewage treatment system aiming at black and odorous water body according to claim 1, wherein: the solar heat-preservation and heat-insulation layer is arranged on the outer wall of the biological rotating disc pool, the fourth overflow weir is arranged on the upper portion of the outer side wall of the water outlet end of the biological rotating disc pool, the fourth water guide pipe is arranged at the bottom of the fourth overflow weir, and the pipeline mixer is arranged at the upper end of the fourth water guide pipe.
6. The improved UCT-coupled biological rotating disc sewage treatment system aiming at black and odorous water body according to claim 1, wherein: the flocculation sedimentation tank is divided into a mixing area at the front section and a sedimentation area at the rear section by a second vertical clapboard; and a stirring device is arranged in the mixing zone, a fifth overflow weir is arranged at the upper part of the outer side wall of the water outlet end of the settling zone, and a fifth water guide pipe is arranged at the bottom of the fifth overflow weir.
7. The improved UCT-coupled biological rotating disc sewage treatment system aiming at black and odorous water body according to claim 1, wherein: and a conical mud discharge plate is further arranged in the canvas filtering pool.
8. The improved UCT-coupled biological rotating disc sewage treatment system aiming at black and odorous water body according to claim 1, wherein: and sludge discharge pipes are arranged at the bottoms of the CASS tank, the flocculation sedimentation tank and the canvas filter tank.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116002890A (en) * | 2022-12-14 | 2023-04-25 | 北京城市排水集团有限责任公司 | Household sewage treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116002890A (en) * | 2022-12-14 | 2023-04-25 | 北京城市排水集团有限责任公司 | Household sewage treatment system and method |
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