CN215592876U - High-efficient integrated aerobic biochemical precipitation treatment system - Google Patents
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- CN215592876U CN215592876U CN202122094368.7U CN202122094368U CN215592876U CN 215592876 U CN215592876 U CN 215592876U CN 202122094368 U CN202122094368 U CN 202122094368U CN 215592876 U CN215592876 U CN 215592876U
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Abstract
The utility model relates to a high-efficiency integrated aerobic biochemical precipitation treatment system, which comprises an integrated aerobic biochemical system and a built-in secondary sludge-water separation sedimentation tank which are communicated through a partition wall, wherein the aerobic biochemical system comprises an aeration tank main body, the aeration tank main body is provided with an aeration device, and the aeration device comprises an aeration main pipe positioned above the aeration tank main body, an aeration branch pipe positioned in the aeration tank main body and an aerator connected with the branch pipe; the built-in second-stage mud-water separation sedimentation tank is internally provided with a first-stage sedimentation tank and a second-stage sedimentation tank which are stacked at intervals from top to bottom, the upper part of the second-stage sedimentation tank is sequentially provided with a support frame, a water outlet groove, a water outlet and a water drainage groove along the water outlet direction, and the support frame is provided with a filler. The utility model can carry out large-scale wastewater treatment, has the advantages of simple operation, strong adaptability, stable operation and the like, can improve the precipitation efficiency by 50-60 percent, and reduces suspended matters in water of system effluent to 15-30 mg/L.
Description
Technical Field
The utility model relates to a high-efficiency integrated aerobic biochemical precipitation treatment system, and belongs to the technical field of environment-friendly water treatment and purification.
Background
In recent years, with the gradual implementation of national environmental protection policies, the investment construction of industrial enterprises on sewage treatment systems is gradually strengthened. Because the available water volume of people in our country is relatively low, the use cost of industrial water is increased year by year, and the sewage discharge requirement is continuously improved and stricter.
In the sewage treatment process, the traditional activated sludge method is widely applied, in order to achieve good effluent effect, a lower organic load is usually adopted in design, high-load wastewater of 1500mg/L and above is usually higher in aerobic sludge concentration in order to ensure that effluent reaches the standard, and secondary precipitated effluent SS is easy to exceed the standard due to higher sludge concentration, and a secondary sedimentation tank is arranged behind the secondary precipitated effluent SS in order to ensure that effluent SS reaches the standard; when the wastewater is treated in the society at present, an aerobic biochemical system adopts contact type biochemistry, a large amount of fillers are filled in an aeration tank, and when the wastewater is treated for pulping and papermaking, because a large amount of colloidal substances and salt substances contained in the wastewater can be slowly attached to the surface of the fillers and are continuously thickened, the fillers are blocked, the contact area of the fillers and the sewage is reduced, the aerobic biochemical treatment capacity and the treatment effect are seriously influenced, and the technology is less and less used in the pulping and papermaking industry.
The sedimentation tank is a main water treatment structure for separating microorganism solid from water, and usually adopts an advection type sedimentation tank and a radial flow type sedimentation tank, because microorganisms are often aged, the aged sludge flocs have lighter specific gravity and often float on the surface of a water body, and in order to avoid the microorganism flocs from flowing away with the water, the hydraulic load usually adopted is generally not more than 0.6m3/m2H, resulting in a large floor space for the settling tank. If a filler (inclined tube or inclined plate) sedimentation tank is directly adopted, the viscosity of aerobic biochemical sludge is larger, the filler blockage phenomenon is easy to occur, the treatment effect is seriously influenced, and the SS (suspended solid) of effluent exceeds the standard. Now, the conventional aeration tank and sinkThe lake pond is usually constructed in a split manner, so that the effective water depth is low, the occupied area is large, the connecting pipeline is complex, the land resources are not fully utilized, and the cost is high; in addition, the traditional sedimentation tank carries out single-stage sedimentation separation, adopts smaller hydraulic load, occupies large area, and has high concentration of effluent suspended matters and poor effect; conventional sedimentation tank goes out water suspended solid higher, generally at 80 ~ 150mg/L, in order to reduce out water suspended solid, can design advanced treatment system after aerobic biochemical treatment system, controls the suspended solid of play water through adding chemical, has so not only increased sewage treatment system's occupation of land, has still increased treatment cost.
Chinese patent document CN201545769 discloses an integrated oxidation sedimentation tank, which comprises a biological contact oxidation tank (10), N energy-saving aeration filler devices (11), a bracket (12) and a sedimentation tank (13), wherein N is a positive integer greater than 2; the biological contact oxidation tank (10) is cylindrical, and the sedimentation tank (13) is conical; the diameters of the biological contact oxidation pond (10) and the sedimentation pond (13) are the same, and the lower end of the biological contact oxidation pond (10) is opened and is butted with the upper end of the sedimentation pond (13); the upper end of a central pipe (1) of the energy-saving aeration filling device (11) is fixedly connected with a frame of a support (12), and the periphery of the support (12) is respectively connected with the periphery of the top of the biological contact oxidation tank (10). The utility model integrates biological contact oxidation and a sedimentation tank, has small residual sludge amount and small occupied area, and saves investment and operation cost.
Chinese patent document CN208561833 discloses an integrated MBBR sewage treatment device, which comprises a tank body, wherein a partition plate is arranged in the tank body, and divides an inner cavity of the tank body into an MBBR tank and a sedimentation tank; a latticed aeration platform is arranged above the bottom of the MBBR tank, an aeration device is installed on the aeration platform, a latticed blocking net is arranged above the aeration platform, MBBR filler is filled in the MBBR tank and is positioned between the aeration platform and the blocking net, the MBBR filler is spherical with the diameter of 5-8 cm, the diameter of the MBBR filler is larger than the aperture of the aeration platform and the blocking net, and the MBBR tank is provided with a water inlet pipe; a sedimentation tank packing layer is arranged above the bottom of the sedimentation tank, a gap exists between the sedimentation tank packing layer and the MBBR tank, a guide plate is arranged on one side of the sedimentation tank packing layer close to the MBBR tank, and a guide channel is formed between the guide plate and the partition plate; an effluent weir is arranged on the inner wall of the tank body above the packing layer of the sedimentation tank, the effluent weir is opposite to the position of the guide plate, and the effluent weir is provided with an effluent pipe. The equipment has the technical effects of reducing the occupied area and uniformly distributing the filler.
Although the two sewage treatment devices are integrated treatment devices, the aerobic biochemical system is in contact biochemical treatment and can only be used for treating domestic sewage, medical sewage and organic wastewater, when the pulping and papermaking wastewater is treated, a large amount of filler is filled in the aeration tank, and the wastewater contains a large amount of colloidal substances and salt substances which can slowly adhere to the surface of the filler and can be thickened continuously, so that the filler is blocked, the contact area of the filler and the sewage is reduced, and the aerobic biochemical treatment capability and treatment effect are seriously influenced; and for the sedimentation tank at the aerobic biochemical rear end, in order to ensure that the effluent reaches the standard for the high-load wastewater of 1500mg/L and above, the higher aerobic sludge concentration is usually adopted, and because the sludge concentration is higher, the SS of the secondary sedimentation effluent is easy to exceed the standard, and in order to ensure that the SS of the effluent reaches the standard, a secondary sedimentation tank is usually arranged behind the two integrated treatment devices. In addition, the MBBR filler has high manufacturing cost, the addition amount can reach 50 percent or more of the tank capacity according to the calculation of water inlet load, and common enterprises are difficult to bear; and after the spherical filler is used for a period of time, the spherical filler is seriously damaged and needs to be frequently replaced.
The CN113041663A of the previous application of the applicant discloses a method for treating wastewater by using a composite high-efficiency sedimentation tank, which comprises the use of the composite high-efficiency sedimentation tank, wherein the sedimentation tank comprises a natural sedimentation zone I and a sedimentation zone II, the natural sedimentation zone I is provided with a water inlet device and a water distribution zone connected with the water inlet device, the water distribution zone is provided with a guide wall, a mud bucket I is arranged below the natural sedimentation zone I, and the mud bucket I is provided with a mud discharge pipe; a mud-water separation device is arranged above the sedimentation zone II and comprises a support frame, a filler is arranged above the support frame, a water outlet groove is arranged above the filler and is connected with a drainage groove, the drainage groove is provided with a drainage outlet, and the drainage outlet is provided with a drainage pipe; and a mud bucket II is arranged below the settling zone II and is provided with a mud pipe. However, this method is generally used for precipitation of physicochemical treatments (i.e. primary sedimentation tank) and is only applicable to 5000m3/dTreating the wastewater with the following small water amount; meanwhile, the method is only a primary sedimentation series connection, the essence of the method is the deformation of a filler sedimentation tank, the filler sedimentation tank belongs to the filler sedimentation tank, when the inlet water SS is higher or is used for aerobic biochemical sedimentation, a filler area is easy to block and even collapses due to the attachment of sludge, the treatment effect and the stable operation are seriously influenced, and therefore, the common filler sedimentation tank is usually used for the inlet water SS which is lower and is not suitable for the biochemical sedimentation tank with higher SS. When the SS of effluent is required to be low when the wastewater with higher SS or aerobic biochemical sewage is treated, two-stage sedimentation is generally arranged, namely, a conventional sedimentation tank is adopted in the first stage, and a filler sedimentation tank is arranged at the rear end of the first-stage sedimentation tank in the second stage so as to meet the requirement of water outlet design. Two sedimentation tanks need independently set up, need set up one-level play water installation and pipe connection's second grade sedimentation tank between, when handling the higher waste water of concentration, because contain higher total salt and gluing thing in the waste water, lean on the flow automatically between two cell bodies, the velocity of flow is lower, connecting tube between because total salt and gluing thing in the aquatic cause the jam very easily, hardly clear up, influence system steady operation. Two sedimentation tanks are arranged, so that the occupied area is large, and the operation management is complex.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a high-efficiency integrated aerobic biochemical precipitation treatment system.
This processing system collects aeration tank and compound sedimentation tank function in an organic whole, has saved the pipeline and has taken up an area of to built-in second grade mud-water separation sedimentation tank adopts high enriched precipitation theory, has improved sedimentation efficiency greatly, and has played the effect of screening high-quality bacterial, and high-quality effectual bacterial can flow back to the aeration tank front end from one-level mud-water separation district, has so both reached sewage treatment's effect, has played the effect of screening again to the bacterial. The suspended matters of the effluent after being treated by the system are greatly reduced to about 15-30 mg/L, and an advanced treatment system is not required to be added at the rear end, so that the consumption of chemicals is greatly reduced, and the occupied area is saved.
The technical scheme of the utility model is as follows:
the integrated aerobic biochemical precipitation treatment system comprises an integrated aerobic biochemical system and a built-in secondary sludge-water separation sedimentation tank which are communicated through a partition wall, wherein the aerobic biochemical system comprises an aeration tank main body, the aeration tank main body is provided with an aeration device, and the aeration device comprises an aeration main pipe positioned above the aeration tank main body, an aeration branch pipe positioned in the aeration tank main body and an aerator connected with the branch pipe; a water inlet is arranged on the upper portion of one side wall of the aeration tank main body, a water hole is formed in the bottom of the partition wall opposite to the side wall, a water distribution retaining wall is arranged in the aeration tank main body and before the water hole is formed, an upper-lower interval superposed primary sedimentation tank and a secondary sedimentation tank are arranged in the built-in secondary mud-water separation sedimentation tank, a support frame, a water outlet groove, a water outlet and a water drainage groove are sequentially arranged on the upper portion of the secondary sedimentation tank along the water outlet direction, and a filler is arranged on the support frame.
According to the utility model, the first-stage sedimentation tank preferably comprises an inclined side wall and a horizontal bottom, the included angle between the side wall and the horizontal bottom is 30-90 degrees, the bottom of the first-stage sedimentation tank is connected with a first-stage sludge pipe, and the first-stage sludge pipe is connected with a first-stage sludge pump.
According to the utility model, the second-stage sedimentation tank comprises an inclined side wall and a horizontal bottom, and the upper part of the side wall of the second-stage sedimentation tank is provided with a water distribution port; the included angle between the side wall and the horizontal bottom is 30-90 degrees, the bottom of the secondary sedimentation tank is connected with a secondary sludge pipe, and the secondary sludge pipe is connected with a sludge discharge pump.
According to the utility model, the filler is preferably an inclined tube filler or an inclined plate filler; the included angle between the inclined tube filler or the inclined plate filler and the support frame is 45-78 degrees, and the vertical height of the filler is 200-1800 mm; further preferably, the material of the filler is selected from polypropylene, polyvinyl chloride, glass fiber reinforced plastics or stainless steel.
According to the utility model, preferably, a water inlet area is arranged between the water inlet and the aerator, an aeration area is arranged in the aerator, an area between the wall of the primary sedimentation tank and the wall of the secondary sedimentation tank is a primary sludge-water separation area, an area above the wall of the secondary sedimentation tank is a secondary sludge-water separation area, the bottom of the primary sludge-water separation area is a primary sludge collection area, the bottom of the secondary sludge-water separation area is a secondary sludge collection area, the height of the primary sludge-water separation area is 5-16 m, and the height of the secondary sludge-water separation area is 4-10 m.
Preferably, according to the utility model, the filler is located in the secondary sludge-water separation zone.
According to the utility model, preferably, the aerobic biochemical system and the built-in secondary sludge-water separation sedimentation tank share a partition wall, and an exhaust hole is also arranged above the water passing hole on the partition wall.
According to the optimization of the utility model, the surface load design value of the secondary sludge-water separation sedimentation tank is 0.8-3.5 m3/(m2H), the suspended substance of the effluent is 15-30 mg/L.
According to the utility model, the water outlet groove is preferably arranged on the inner side wall or the outer side wall of the built-in secondary mud-water separation sedimentation tank main body.
According to the utility model, the drainage channel is preferably composed of a single drainage channel pipe or more than two drainage channel pipes.
Further preferably, the drainage channel consists of 4-10 drainage channel pipelines.
The utility model is redesigned on the basis of the prior art, adopts a mode of combining an aeration tank and a sedimentation tank to form an integrated aerobic biochemical system and a built-in secondary sludge-water separation sedimentation tank, divides the whole system into a water inlet area, an aeration area, a primary sludge-water separation area and a secondary sludge-water separation area, arranges a plurality of dense inclined tube fillers or inclined plate fillers in the secondary separation area, adopts a high-concentration and filler composite sedimentation theory in the built-in secondary sludge-water separation sedimentation tank, directly enters the secondary sludge-water separation area from the sewage separated by the primary sludge-water separation area through a water distribution port, rectifies and falls into the secondary sludge collection area through the fillers after the sewage enters the secondary sludge separation area under the action of gravity, collides, adheres and adsorbs the sludge in the sewage and the sludge with higher concentration in the sludge collection area, and then intercepts the sludge at the bottom, and makes the water after the sludge separation move upwards, and further separating in a filling area, and discharging through a drainage system. The separated sludge slides downwards along the inclined plate (pipe) to the bottom under the action of gravity and then is discharged in a centralized manner. The sedimentation efficiency of the sedimentation basin can be improved by 50-60%, and the treatment capacity can be improved by 3-5 times.
Adopt the integrationThe aerobic biochemical precipitation treatment system is used for treating wastewater, and the surface load design value of the built-in secondary mud-water separation and precipitation tank can be increased to 0.8-3.5 m3/(m2H). Compared with the conventional secondary sedimentation tank, the occupied area can be reduced by 1/3-1/2; and the built-in secondary mud-water separation sedimentation tank well solves the problems of high concentration of effluent suspended matters, easy scaling and blockage of pipelines and the like, so the method is suitable for wastewater treatment of various scales.
The utility model has not been described in detail, but is in accordance with the state of the art.
The utility model has the beneficial effects that:
1. the utility model is redesigned on the basis of the prior art, adopts a mode of combining an aeration tank and a sedimentation tank to form an integrated aerobic biochemical system and a built-in secondary sludge-water separation sedimentation tank, divides the whole system into a water inlet area, an aeration area, a primary sludge-water separation area and a secondary sludge-water separation area, arranges a plurality of intensive inclined tube fillers or inclined plate fillers in the secondary sludge separation area, allows sludge separated by the inclined plate fillers or inclined tube fillers to fall to the secondary sludge collection area through a rectifying area under the action of gravity and then to be discharged out of the tank through a sludge discharge pump, and allows separated clear water to be discharged out of the tank through a drainage tank after being collected by a water outlet tank from the upper part of an inclined plate or an inclined tube. The utility model combines the advantages of an aeration tank and a high-efficiency sedimentation tank, efficiently removes pollutants in wastewater in a system, makes suspended impurities in water precipitate in the inclined plate or the inclined tube, makes water flow upwards along the inclined plate filler or the inclined tube filler, makes separated sludge slide downwards to a secondary sludge collecting area along the inclined plate or the inclined tube under the action of gravity, reduces sludge accumulation at the bottom of the tank and sludge accumulation of a sludge discharge pipeline, can improve the precipitation efficiency by 50-60%, and reduces suspended matters in water discharged from the system to 15-30 mg/L.
2. The utility model adopts a mode of combining the aeration tank and the sedimentation tank to form an integrated aerobic biochemical system and a built-in secondary sludge-water separation sedimentation tank, further reduces the floor area, saves the floor area of 1/3-1/2, reduces the pipeline connection among the systems, reduces the influence on production due to the fault of a connecting pipeline, and reduces the production cost.
3. The primary sludge collecting area and the secondary sludge collecting area at the bottoms of the primary sludge-water separation area and the secondary sludge-water separation area can be continuously and uniformly discharged without causing sludge accumulation, the primary sludge flows back to the front end of the high-efficiency integrated aerobic biochemical treatment system, the survival of dominant strains is ensured, the continuous and stable operation of the system is ensured, and the design value of the surface load of the existing sedimentation tank is 0.4-0.6 m3/(m2H) up to 0.8 to 3.5m3/(m2H), solves the problem that the existing sedimentation tank is only suitable for small-sized water treatment, enables the sedimentation tank to carry out large-scale wastewater treatment, and has the advantages of simple operation, strong adaptability, stable operation and the like.
Drawings
FIG. 1 is a schematic structural diagram of the high-efficiency integrated aerobic biochemical precipitation treatment system of the utility model.
Wherein: 1. aeration tank main part, 2, built-in second grade mud-water separation sedimentation tank, 3, water inlet, 4, the aeration is responsible for, 5, aeration branch pipe, 6, aerator, 7, water distribution barricade, 8, cross the water hole, 9, one-level collection mud district, 10, second grade collection mud district, 11, water distribution mouth, 12, support frame, 13, filler, 14, play basin, 15, delivery port, 16, water drainage tank, 17, one-level sludge pump, 18, sludge discharge pump, 19, exhaust hole.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following specific examples.
Example 1
A high-efficiency integrated aerobic biochemical precipitation treatment system is shown in a figure 1, and comprises an integrated aerobic biochemical system and a built-in secondary sludge-water separation sedimentation tank 2 which are communicated through a partition wall, wherein the aerobic biochemical system comprises an aeration tank main body 1, the aeration tank main body 1 is provided with an aeration device, the aeration device comprises an aeration main pipe 4 positioned above the aeration tank main body, an aeration branch pipe 5 positioned in the aeration tank main body and an aerator 6 connected with the branch pipe, and the aeration device 1 is provided with air by a fan in a fan room; the upper part of one side wall of the aeration tank main body is provided with a water inlet 3, the bottom of the partition wall opposite to the side wall is provided with a water through hole 8, and a water distribution retaining wall 7 is arranged in the aeration tank main body and in front of the water through hole. A water inlet area is arranged between the water inlet and the aerator, and an aeration area is arranged in the aeration area of the aerator.
The built-in secondary mud-water separation sedimentation tank is internally provided with a primary sedimentation tank and a secondary sedimentation tank which are vertically stacked at intervals, the upper part of the secondary sedimentation tank is sequentially provided with a support frame 12, a water outlet groove 14, a water outlet 15 and a water drainage groove 16 along the water outlet direction, and the support frame is provided with a filler 13. The drainage groove 16 is positioned on the side wall of the secondary sedimentation tank, the water outlet groove 14 is connected with the drainage groove 16, and the water outlet groove 14 is provided with a water outlet 15. The filler 13 is an inclined tube filler, the inclination angle of the filler 13 is 60 degrees, the vertical height of the filler 13 is 1100mm, and the filler is made of polyvinyl chloride.
The one-level sedimentation tank comprises an inclined side wall and a horizontal bottom, the included angle between the side wall and the horizontal bottom is 60 degrees, the bottom of the one-level sedimentation tank is connected with a one-level sludge pipe, and the one-level sludge pipe is connected with a one-level sludge pump 17.
The secondary sedimentation tank comprises an inclined side wall and a horizontal bottom, and the upper part of the side wall of the secondary sedimentation tank is provided with a water distribution port; the included angle between the side wall and the horizontal bottom is 60 degrees, the bottom of the secondary sedimentation tank is connected with a secondary sludge pipe, and the secondary sludge pipe is connected with a sludge discharge pump 18.
The area between the wall of the first-stage sedimentation tank and the wall of the second-stage sedimentation tank is a first-stage mud-water separation area, the area above the wall of the second-stage sedimentation tank is a second-stage mud-water separation area, the bottom of the first-stage mud-water separation area is a first-stage sludge collection area 9, the bottom of the second-stage mud-water separation area is a second-stage sludge collection area 10, the height of the first-stage mud-water separation area is 5-16 m, and the height of the second-stage mud-water separation area is 4-10 m. The filler 13 is positioned in the secondary sludge-water separation zone.
The aerobic biochemical system and the built-in secondary sludge-water separation sedimentation tank share a partition wall, an exhaust hole 19 is also arranged above the water passing hole on the partition wall, and gas separated from the primary sludge-water separation zone is exhausted through the exhaust hole 19. The surface load design value of the secondary mud-water separation sedimentation tank is 0.8-3.5 m3/(m2H). The water drainage tank is composed of 4-10 water drainage tank pipelines.
Example 2
The high-efficiency integrated aerobic biochemical precipitation treatment system as described in example 1, except that:
the packing 13 is a pipe chute packing, the inclination angle of the packing 13 is 75 degrees, the vertical height of the packing 13 is 1500mm, the material of the packing is polypropylene, and the rest is carried out as in example 1.
Example 3
The high-efficiency integrated aerobic biochemical precipitation treatment system as described in example 1, except that:
the packing 13 is a pipe chute packing, the inclination angle of the packing 13 is 60 degrees, the vertical height of the packing 13 is 500mm, the material of the packing is polypropylene, and the rest is carried out as in example 1.
Comparative example 1
A common aerobic biochemical treatment system comprises an aeration tank and a sedimentation tank which are separately constructed, wherein the sedimentation tank adopts a horizontal flow sedimentation tank. The waste water enters an aeration tank through a water inlet pipe, an aeration device is arranged in the aeration tank, aerobic microorganisms decompose and digest biochemical pollutants, most of the biochemical pollutants are converted into pollution-free carbon dioxide and water, and part of the biochemical pollutants are digested and utilized as nutrient substances for self growth. Aeration tank goes out water and gets into the sedimentation tank, and the sedimentation tank is conventional advection formula sedimentation tank, and mud only makes muddy water separate through once natural settling, goes out water suspended solid concentration higher, generally at 80 ~ 150mg/L, and the continuous long-term operation causes the bagger mud discharging uneven easily, and some baggers can seriously amass mud, cause the mud come-up, make the water suspended solid change great, can't satisfy the emission standard requirement.
Comparative example 2
A common aerobic biochemical treatment system comprises an aeration tank and a sedimentation tank which are separately built, wherein the sedimentation tank adopts a radial flow sedimentation tank. The waste water enters an aeration tank through a water inlet pipe, an aeration device is arranged in the aeration tank, aerobic microorganisms decompose and digest biochemical pollutants, most of the biochemical pollutants are converted into pollution-free carbon dioxide and water, and part of the biochemical pollutants are digested and utilized as nutrient substances for self growth. Aeration tank effluent gets into the sedimentation tank, the sedimentation tank is conventional radial-flow sedimentation tank, the muddy water enters into the sedimentation tank through central water distribution by the inlet tube, after sedimentation tank dwell certain time, through the peripheral play weir overflow of sedimentation tank get into the basin through the delivery port discharge, mud is discharged by bottom mud bucket after the mud scraper is collected, because the overflow does not reinforce the separation through the filler, the play water suspended solid is higher, can't satisfy emission standard requirement, consequently, increase at the sedimentation tank rear end under the general condition and set up sand filtration system or other devices, in order to satisfy emission standard requirement. The process has poor treatment effect, long flow, high management difficulty and effluent which can not meet the requirements of national standards.
Test examples
The wastewater treatment system of examples 1-3 and comparative examples 1-2 was used for conducting an effect test. The sewage to be treated is the sewage to be treated after being treated by the anaerobic biochemical system, the COD value in the sewage is 2000mg/L, the concentration of suspended matters in the sewage is 600mg/L, and the treatment result is shown in the following table 1:
TABLE 1
| Item | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Inflow water CODmg/L | 2000 | 2000 | 2000 | 2000 | 2000 |
| Influent suspended matter mg/L | 600 | 600 | 600 | 600 | 600 |
| Suspended matter mg/L of effluent | 22 | 28 | 29 | 120 | 80 |
As can be seen from the data in Table 1, when the integrated aerobic biochemical precipitation treatment system in the embodiments 1 to 3 is used for treating wastewater, the suspended matter in the wastewater before treatment is 600mg/L, the suspended matter in the wastewater after treatment is 22mg/L, 28mg/L and 29mg/L respectively, the suspended matter in the wastewater is reduced to be below 30mg/L, the sludge at the bottom of the tank and the sludge accumulation of a sludge discharge pipeline are reduced, the precipitation efficiency can be improved by 50 to 60 percent, and the design value of the surface load of the built-in secondary sludge-water separation precipitation tank can be improved to 0.8 to 3.5m3/(m2H). Compared with the conventional secondary sedimentation tank, the occupied area can be reduced by 1/3-1/2; and the built-in secondary mud-water separation sedimentation tank well solves the problems of high concentration of effluent suspended matters, easy scaling and blockage of pipelines and the like, so the method is suitable for wastewater treatment of various scales.
Claims (10)
1. The integrated aerobic biochemical sedimentation treatment system is characterized by comprising an integrated aerobic biochemical system and a built-in secondary sludge-water separation sedimentation tank which are communicated through a partition wall, wherein the aerobic biochemical system comprises an aeration tank main body, the aeration tank main body is provided with an aeration device, and the aeration device comprises an aeration main pipe positioned above the aeration tank main body, an aeration branch pipe positioned in the aeration tank main body and an aerator connected with the branch pipe; a water inlet is arranged on the upper portion of one side wall of the aeration tank main body, a water hole is formed in the bottom of the partition wall opposite to the side wall, a water distribution retaining wall is arranged in the aeration tank main body and before the water hole is formed, an upper-lower interval superposed primary sedimentation tank and a secondary sedimentation tank are arranged in the built-in secondary mud-water separation sedimentation tank, a support frame, a water outlet groove, a water outlet and a water drainage groove are sequentially arranged on the upper portion of the secondary sedimentation tank along the water outlet direction, and a filler is arranged on the support frame.
2. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the primary precipitation tank comprises an inclined side wall and a horizontal bottom, the included angle between the side wall and the horizontal bottom is 30-90 degrees, the bottom of the primary precipitation tank is connected with a primary sludge pipe, and the primary sludge pipe is connected with a primary sludge pump.
3. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the secondary precipitation tank comprises an inclined side wall and a horizontal bottom, and a water distribution port is arranged at the upper part of the side wall of the secondary precipitation tank; the included angle between the side wall and the horizontal bottom is 30-90 degrees, the bottom of the secondary sedimentation tank is connected with a secondary sludge pipe, and the secondary sludge pipe is connected with a sludge discharge pump.
4. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the packing is a tube packing or a plate packing; the included angle between the inclined tube filler or the inclined plate filler and the support frame is 45-78 degrees, and the vertical height of the filler is 200-1800 mm; further preferably, the material of the filler is selected from polypropylene, polyvinyl chloride, glass fiber reinforced plastics or stainless steel.
5. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein a water inlet region is arranged between the water inlet and the aerator, an aeration region is arranged in an aeration region of the aerator, a region between the wall of the primary precipitation tank and the wall of the secondary precipitation tank is a primary sludge-water separation region, a region above the wall of the secondary precipitation tank is a secondary sludge-water separation region, a primary sludge collection region is arranged at the bottom of the primary sludge-water separation region, a secondary sludge collection region is arranged at the bottom of the secondary sludge-water separation region, the height of the primary sludge-water separation region is 5-16 m, and the height of the secondary sludge-water separation region is 4-10 m.
6. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the filler is located in the secondary sludge water separation zone.
7. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the aerobic biochemical system and the built-in secondary sludge-water separation and precipitation tank share a partition wall, and an exhaust hole is further arranged above the water through hole on the partition wall.
8. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the surface load design value of the secondary sludge-water separation and precipitation tank is 0.8-3.5 m3/(m2H), the suspended substance of the effluent is 15-30 mg/L.
9. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the water outlet tank is arranged on the inner side wall or the outer side wall of the built-in secondary sludge-water separation and precipitation tank body.
10. The integrated aerobic biochemical precipitation treatment system according to claim 1, wherein the drainage channel is composed of a single drainage channel pipe or more than two drainage channel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122094368.7U CN215592876U (en) | 2021-09-01 | 2021-09-01 | High-efficient integrated aerobic biochemical precipitation treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122094368.7U CN215592876U (en) | 2021-09-01 | 2021-09-01 | High-efficient integrated aerobic biochemical precipitation treatment system |
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