CN110585794A - Carrier filter and application thereof in sewage treatment - Google Patents
Carrier filter and application thereof in sewage treatment Download PDFInfo
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- CN110585794A CN110585794A CN201910975663.8A CN201910975663A CN110585794A CN 110585794 A CN110585794 A CN 110585794A CN 201910975663 A CN201910975663 A CN 201910975663A CN 110585794 A CN110585794 A CN 110585794A
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- suspension
- screen
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- 239000010865 sewage Substances 0.000 title abstract description 17
- 239000010802 sludge Substances 0.000 claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 109
- 239000000725 suspension Substances 0.000 claims abstract description 64
- 238000009826 distribution Methods 0.000 claims abstract description 15
- 238000011001 backwashing Methods 0.000 claims description 41
- 239000000969 carrier Substances 0.000 claims description 20
- 238000005273 aeration Methods 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 25
- 230000008569 process Effects 0.000 abstract description 25
- 238000001914 filtration Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000001556 precipitation Methods 0.000 abstract description 5
- 230000010354 integration Effects 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 239000004576 sand Substances 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000009287 sand filtration Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a carrier filter, which comprises a shell, a suspension carrier bed, a sludge buffer zone and a sludge layer, wherein the suspension carrier bed is arranged on the shell; a water distribution system is arranged in the sludge layer and is connected with one end of a water inlet pipe, and the other end of the water inlet pipe extends out of the shell; the sludge buffer zone is arranged between the sludge layer and the suspension carrier bed, the suspension carrier bed is separated from the sludge buffer zone by a support screen, a water outlet interception screen is also arranged above the suspension carrier bed, and the water outlet interception screen is also communicated with the water collecting tank; the water collecting tank is positioned above the suspension carrier bed and communicated with the shell; the invention also discloses the application of the carrier filter in sewage treatment. The invention has the advantages of high-efficiency integrated precipitation and filtration function, high solid-liquid separation efficiency, high process integration level, good effluent effect, stable operation, land occupation saving and the like, and is particularly suitable for precipitation and filtration equipment in small and medium-sized sewage treatment projects.
Description
Technical Field
The invention relates to the technical field of sewage treatment equipment, in particular to a carrier filter and application thereof in sewage treatment.
Background
At present, with the rapid development of urban construction and the continuous improvement of the living standard of people, the discharge amount of domestic sewage is continuously increased, and the discharge amount becomes an important factor for restraining the healthy development of national economy.
The biological method treatment has the advantages of low cost, less secondary pollution, mild conditions and the like, and is widely applied to the treatment of domestic sewage in villages and towns. However, with the stricter sewage drainage standards, the discharge requirement of SS of part of rural domestic sewage effluent is higher than the first-class B discharge standard (SS is less than or equal to 20mg/L), even reaches the first-class A discharge standard (SS is less than or equal to 10 mg/L).
As the effluent SS of the conventional secondary sedimentation tank, such as a vertical sedimentation tank and an inclined plate (pipe) sedimentation tank, is generally 20-40 mg/L, the effluent SS can not stably reach the discharge standard of the first grade B and above. It is often necessary to use a filter device, such as a sand filter tank, to achieve a level B or above discharge level.
In the practical application process, the surface load of the vertical sedimentation tank is low, the tank is deep and high, the occupied area is large, and the influence of a water distribution mode, sludge settling performance, denitrification floating sludge, anaerobic floating sludge and the like is large; the inclined plate (pipe) sedimentation tank has poor buffering capacity, the inclined pipe is easy to accumulate mud, the water outlet stability is influenced, and the operation and maintenance workload is increased. The sand filtration tank equipment has large internal head loss, and needs to be matched with facilities such as a clean water tank, a lifting pump, a backwashing pump and the like, so that the operation cost and the manufacturing cost are greatly increased; meanwhile, the requirement on the SS of the inlet water is high, and the SS is generally less than or equal to 40 mg/L; and the problems that the filter material is easy to block or harden, the backwashing water amount is large (2-5 percent), and the like exist.
Disclosure of Invention
The invention discloses a carrier filter and application thereof in sewage treatment, and aims to solve the problems of high SS (suspended solid) content, large occupied area, influence of floating mud, poor stability and the like of effluent in the independent treatment process of a secondary sedimentation tank, and the technical problems of large occupied area, high backwashing difficulty, large backwashing water quantity, high operation and maintenance and manufacturing cost and the like in the combined process of the secondary sedimentation tank and a sand filter tank.
In order to achieve the purpose, the invention adopts the following technical scheme:
a carrier filter comprises a shell, a suspended carrier bed, a sludge buffer zone and a sludge layer, wherein the suspended carrier bed, the sludge buffer zone and the sludge layer are arranged in the shell; a water distribution system is arranged in the sludge layer and is connected with one end of a water inlet pipe, and the other end of the water inlet pipe extends out of the shell; the sludge buffer zone is arranged between the sludge layer and the suspension carrier bed, the suspension carrier bed is separated from the sludge buffer zone by a support screen, a water outlet interception screen is also arranged above the suspension carrier bed, and the water outlet interception screen is also communicated with the water collecting tank; the water collecting tank is positioned above the suspension carrier bed and communicated with the shell; the shell is also provided with a water outlet pipe, a backwashing air pipe, a middle sludge discharge pipe and a bottom sludge discharge pipe.
As a further preferred aspect of the invention, the water outlet pipe is communicated with the lower part of the water collecting tank, the backwashing air pipe is communicated with the lower part of the suspended carrier bed, the middle sludge discharge pipe and the bottom sludge discharge pipe are respectively arranged at the upper part and the lower part of the sludge layer, and the sludge level of the sludge layer is regulated and controlled through the middle sludge discharge pipe.
As a further optimization of the invention, control valves are respectively arranged on the water outlet pipe, the backwashing air pipe, the middle sludge discharge pipe and the bottom sludge discharge pipe.
As a further optimization of the invention, the backwashing air pipes are uniformly arranged at the lower part of the suspended carrier bed, and the aeration form is perforated pipe aeration.
As a further preferred aspect of the present invention, the water distribution system is selected from one of a conical water distributor, a flat-plate hole type water distributor and a perforated pipe type water distributor.
In a further preferred embodiment of the present invention, the height of the suspension carrier bed is 0.4 to 1.5m, the height of the sludge buffer zone is 0.3 to 0.7m, and the height of the sludge blanket is 0.5 to 1.2 m.
As a further optimization of the invention, the suspension carrier bed is filled with suspension carriers, the suspension carriers are at least one of columnar, spherical and rectangular in shape, the suspension carriers are made of at least one of HDPE, PE, PUR, PP and PU, and the diameter or side length is 10-40 mm.
In a further preferred embodiment of the present invention, the support screen is a flat screen, and the size of the openings of the support screen is 8 to 20 mm.
As a further optimization of the invention, the water outlet interception screen is a flat screen or a roller screen, and the size of an opening of the water outlet interception screen is 8-20 mm.
The invention also aims to disclose the application of the carrier filter in sewage treatment, and the carrier filter is particularly suitable for medium and small-sized sewage treatment projects.
The invention has the beneficial effects that:
1. the invention realizes the integration of the functions of the traditional sedimentation tank and sand filtration, and has the advantages of high solid-liquid separation efficiency, good water outlet effect, stable operation, land occupation saving and the like.
2. The problem that the SS of the effluent treated by the conventional secondary sedimentation tank is higher is solved, and the pollutant carrying capacity and treatment effect of the system are greatly improved; under the action of the water distribution system, raw water uniformly passes through a sludge layer, a large amount of sludge flocs carried in the raw water are firstly intercepted by the sludge layer, a small amount of sludge flocs which are not intercepted enter a suspension carrier bed to be further intercepted, and supernatant passes through a water outlet intercepting screen to realize separation of supernatant-suspension carriers.
3. The problems of high tank depth, large occupied area, influence by floating mud and poor stability of the secondary sedimentation tank are solved; the arrangement of the suspension carrier bed can greatly improve the surface load of the system and reduce the occupied area; meanwhile, the sludge layer is in a micro-expansion state under the action of raw water, and the risk of floating of denitrification floating mud or anaerobic floating mud is avoided; when the sludge layer is unstable, the concentration of sludge flocs in the sludge buffer zone is higher, and the stability of effluent can be still ensured under the interception action of the suspension carrier bed.
4. The problems of large loss, high backwashing difficulty, large backwashing water amount, easy hardening and the like of the traditional sand filtration head are solved; compared with the conventional filter tank, the suspension carrier has larger filter material particles and high porosity, can greatly improve the pollutant carrying capacity of the system and greatly reduce the head loss of the system; in the backwashing process, because the suspended carrier is light in weight and high in porosity, the suspended carrier can be in a fluidized state by a small amount of aeration, the backwashing effect is obviously enhanced, and the backwashing difficulty is reduced.
5. The removal of total nitrogen can be enhanced; the bottom of the carrier filter is provided with a sludge layer with a certain thickness, and nitrate nitrogen carried in the inlet water can generate endogenous denitrification after passing through the sludge layer so as to reduce the total nitrogen of the outlet water.
6. Coagulant can be added into the water inlet pipe for chemical phosphorus removal, and the total phosphorus concentration of the effluent is low.
7. Subsequent filtering facilities are saved, and the process flow is shortened; the subsequent matching of filtering facilities is reduced, and the investment cost, the operation energy consumption and the operation management difficulty are reduced; and an automatic control system is arranged, so that unattended operation can be realized.
In conclusion, the invention has the advantages of high solid-liquid separation efficiency, high process integration level, good water outlet effect, stable operation, land occupation saving and the like, and is particularly suitable for precipitation filtration equipment in small and medium-sized sewage treatment projects.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein, 1-shell; 2-water inlet pipe; 3-a water distribution system; 4-sludge blanket; 5-a sludge buffer zone; 6-supporting the screen mesh; 7-a bed of suspended carrier; 8-a water outlet interception screen mesh; 9-a water collecting tank; 10-water outlet pipe; 11-backwashing the air pipe; 12-a middle sludge discharge pipe; 13-bottom sludge discharge pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in FIG. 1, a carrier filter comprises a housing 1, a suspended carrier bed 7, a sludge buffer zone 5 and a sludge layer 4 which are arranged in the housing 1; a water distribution system 3 is arranged in the sludge layer 4, the water distribution system 3 is connected with one end of the water inlet pipe 2, and the other end of the water inlet pipe 2 extends out of the shell 1; the sludge buffer zone 5 is arranged between the sludge layer 4 and the suspension carrier bed 7, the suspension carrier bed 7 is separated from the sludge buffer zone 5 by a support screen 6, a water outlet interception screen 8 is also arranged above the suspension carrier bed 7, the water outlet interception screen 8 is also communicated with a water collection tank 9, and the water collection tank 9 is positioned above the suspension carrier bed 7 and is communicated with the shell 1; the shell 1 is also provided with a water outlet pipe 10, a backwashing air pipe 11, a middle sludge discharge pipe 12 and a bottom sludge discharge pipe 13.
Particularly, the water outlet pipe 10 is communicated with the lower part of the water collecting tank 9, the backwashing air pipe 11 is communicated with the lower part of the suspended carrier bed 7, the middle sludge discharge pipe 12 and the bottom sludge discharge pipe 13 are respectively arranged at the upper part and the lower part of the sludge layer 4, and the sludge level of the sludge layer 4 is regulated and controlled through the middle sludge discharge pipe 12.
Particularly, control valves are respectively arranged on the water outlet pipe 10, the backwashing air pipe 11, the middle sludge discharge pipe 12 and the bottom sludge discharge pipe 13 and are respectively used for controlling the opening and closing of the pipeline.
Particularly, the backwashing air pipes are uniformly arranged at the lower part of the suspension carrier bed, and the aeration mode is perforated pipe aeration, so that the filler in the suspension carrier bed is uniformly turned over.
In particular, the water distribution system 3 is a conical water distributor.
In particular, the height of the suspension carrier bed 7 is 0.8m, the height of the sludge buffer zone 5 is 0.6m, the height of the sludge blanket 4 is 0.6m, and the nitrate nitrogen carried in the inlet water can generate endogenous denitrification after passing through the sludge blanket 4 with a certain thickness so as to reduce the total nitrogen of the outlet water.
In particular, the suspension carrier bed 7 is filled with suspension carriers, the suspension carriers are columnar, the suspension carriers are made of HDPE, and the diameter of the suspension carriers is 25 mm; the addition of the suspension carrier can shorten the settling distance of sludge flocs, so that small sludge flocs can be intercepted; meanwhile, the movement of the sludge flocs in the suspension carrier bed 7 belongs to dynamic separation, and mutual collision among the sludge flocs is strengthened, so that small sludge flocs are condensed into large sludge flocs and are trapped in the suspension carrier bed 7.
In particular, the support screen 6 is a flat screen, and the opening size of the support screen 6 is 18 mm.
Specifically, the outlet water intercepting screen 8 is a drum screen, and the size of the opening of the outlet water intercepting screen 8 is 18 mm.
The working process of the carrier filter comprises normal operation, backwashing and sludge discharge, wherein:
(1) normal operation process
The backwashing air pipe 11 is closed, sewage enters the carrier filter from the water inlet pipe 2, the inlet water is uniformly distributed at the bottom of the carrier filter under the action of the water distribution system 3, most sludge flocs are intercepted in the sludge layer 4, a small amount of sludge flocs pass through the sludge layer 4 with a certain height to reach the sludge buffer zone 5, and partial sludge flocs are mutually flocculated or combined in the sludge buffer zone 5 and then are settled in the sludge layer 4 again; a very small amount of small sludge flocs can upwards enter a suspension carrier bed 7 and are further treated by a suspension carrier; the supernatant passes through the water outlet interception screen mesh 8 and then is collected into the water collection tank 9, and finally is discharged out of the carrier filter through the water outlet pipe 10.
(2) Backwash process
The inlet water continuously enters the carrier filter, the water outlet pipe 10 is closed, and the backwashing air pipe 11 is opened; after the backwashing process is finished, the water outlet pipe 10 is opened, the backwashing air pipe 11 is closed, and the backwashing turbid liquid is discharged out of the system.
(3) Sludge discharge process
The middle sludge discharge pipe 12 and the bottom sludge discharge pipe 13 are periodically opened to maintain the stability of the height of the sludge layer 4 in the carrier filter.
According to the invention, the water distribution system 3 is arranged in the sludge layer 4, so that sludge flocs in inlet water and the bottom sludge layer 4 generate a micro-flocculation effect, most of the sludge flocs are removed, the operation load of the suspension carrier bed 7 is reduced, and the backwashing period of the suspension carrier bed 7 is prolonged; the suspension carrier is added into the suspension carrier bed 7 to further remove fine sludge flocs and ensure the quality of effluent.
The invention has the functions of efficient integrated precipitation and filtration, has the advantages of high solid-liquid separation efficiency, high process integration level, good water outlet effect, stable operation, land occupation saving and the like, and is particularly suitable for precipitation and filtration equipment in small and medium-sized sewage treatment projects.
Example 2
The difference from example 1 is that:
the water distribution system 3 adopts a flat plate hole type water distributor;
the height of the suspension carrier bed 7 is 0.4m, the height of the sludge buffer zone 5 is 0.3m, and the height of the sludge layer 4 is 0.5 m;
the suspension carrier bed 7 is filled with suspension carriers, the suspension carriers are spherical, the suspension carriers are made of PP, and the diameter of the suspension carriers is 10 mm;
the support screen 6 is a flat screen, and the size of an opening of the support screen 6 is 8 mm;
the above-mentioned effluent interception screen mesh 8 is a flat screen mesh, and the size of the opening of the effluent interception screen mesh 8 is 8 mm.
Example 3
The difference from example 1 is that:
the water distribution system adopts a perforated pipe type water distributor;
the height of the suspension carrier bed is 1.5m, the height of the sludge buffer zone is 0.7m, and the height of the sludge layer is 1.2 m;
the suspension carrier bed is filled with suspension carriers, the suspension carriers are spherical, the suspension carriers are made of PP, and the diameter of the suspension carriers is 38 mm;
the supporting screen is a flat screen, and the size of an opening of the supporting screen is 20 mm;
the water outlet interception screen is a roller screen, and the size of an opening of the water outlet interception screen is 20 mm.
Examples
The carrier filter is applied to a sewage treatment station in a certain village and town.
The process comprises the following steps: a/O (pure membrane MBBR process) + carrier filter;
the design throughput of the carrier filter is200m3D, the actual surface load can reach 1.7m3/(m2 ·h)。
After the effluent SS of the aerobic pure membrane MBBR tank is filtered by the carrier filter, the effluent SS can stably reach the first-level A discharge standard, and the measured SS of the effluent SS of the aerobic pure membrane MBBR tank is 70-120 mg/L, and the SS of the effluent SS of the carrier filter is 7.5-9.4 mg/L.
Compared with the traditional combined process of the secondary sedimentation tank and the sand filtration tank, the following advantages are that:
(1) the energy consumption is obviously reduced
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: a secondary sedimentation tank mud scraper is required: n is 0.37kW, and the running time is 24 h; need sand filtration intake pump: q is 10m3/h，H＝15m3H, N ═ 1.5kW, run time: 18 h; a sand filtration backwashing pump: q is 40m3/h，H＝15m3H, N ═ 4kW, run time: for 10 min.
The carrier filter is adopted: the device is not needed, and meanwhile, the device is not newly added.
(2) Clean water-free pool
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: the HRT of the clean water pool is 0.5h, the effective height is 2m, and the occupied area of the clean water pool is 200/24 multiplied by 0.5/2 is 2.08m2。
The carrier filter is adopted: the backwashing process can be completed only by utilizing the inflow water of the gravity flow because the backwashing process does not need to additionally increase the strength of the backwashing water; therefore, a clean water tank is not required. Not only reduces the occupied area, but also saves the manufacturing cost of the clean water tank.
(3) Land occupation saving
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: surface load of secondary sedimentation tank is 0.7m3/(m2 ·h) The secondary sedimentation tank occupies 200/24/0.7-11.9 m of land2(ii) a Sand filter tank adoptsGlass fibre reinforced plastic jar, sand filter jar occupying 3.14 × (1.2/2)2＝1.13m2(ii) a The occupation area of the clean water pool is 2.08m2(ii) a Total occupied land: 15.11m2。
The carrier filter is adopted: surface load at 1.7m3/(m2 ·h) The carrier filter occupies 200/24/1.7-4.9 m2。
And the occupied area of the carrier filter is only 32.33 percent of that of the combined process of the secondary sedimentation tank and the sand filtering tank.
(4) Low water consumption
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: the backwashing period of the sand filter tank is 1d, and the backwashing water strength of the sand filter tank is 10L/(m)2 ·S), the backwashing time is 10min, and the backwashing water quantity is 10 multiplied by 3.14 multiplied by (1.2/2)2/3600/1000×10/60＝6.78m3/d。
The carrier filter is adopted: the backwashing period is 2d, the carrier filter is filled with water to obtain backwashing water, and the backwashing strength is 1.7m3/(m2 ·h) Counting the backwashing time for 12min, and measuring the water consumption: 200/24/60X 12/2 ═ 0.84m3/d。
And the backwashing water quantity of the carrier filter is only 12.4 percent of that of the combined process of the secondary sedimentation tank and the sand filtering tank.
(5) The filter material has long service life
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: the filter material of the sand filter tank is quartz sand, hardening or loss is easy to occur due to reasons such as incomplete backwashing and the like, and the filter material replacement time is usually 3-8 years.
The carrier filter is adopted: the filter material is a suspension carrier, and the service life is longer than or equal to 15 years.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. The carrier filter is characterized by comprising a shell, a suspended carrier bed, a sludge buffer zone and a sludge layer, wherein the suspended carrier bed, the sludge buffer zone and the sludge layer are arranged in the shell; a water distribution system is arranged in the sludge layer and is connected with one end of a water inlet pipe, and the other end of the water inlet pipe extends out of the shell; the sludge buffer zone is arranged between the sludge layer and the suspension carrier bed, the suspension carrier bed is separated from the sludge buffer zone by a support screen, a water outlet interception screen is also arranged above the suspension carrier bed, and the water outlet interception screen is also communicated with the water collecting tank; the water collecting tank is positioned above the suspension carrier bed and communicated with the shell; the shell is also provided with a water outlet pipe, a backwashing air pipe, a middle sludge discharge pipe and a bottom sludge discharge pipe.
2. The carrier filter of claim 1, wherein the water outlet pipe is communicated with the lower part of the water collecting tank, the backwashing air pipe is communicated with the lower part of the suspended carrier bed, the middle sludge discharge pipe and the bottom sludge discharge pipe are respectively arranged at the upper part and the lower part of the sludge blanket, and the sludge level of the sludge blanket is regulated and controlled through the middle sludge discharge pipe.
3. The carrier filter of claim 2 wherein control valves are mounted on the outlet pipe, backwash air duct, middle sludge discharge duct and bottom sludge discharge duct, respectively.
4. A carrier filter as claimed in claim 3 wherein the backwash duct is uniformly arranged below the suspended carrier bed in the form of perforated tube aeration.
5. The carrier filter of claim 1 wherein the water distribution system is selected from the group consisting of a conical distributor, a flat-cell distributor, and a perforated tubular distributor.
6. The carrier filter of claim 2, wherein the height of the suspension carrier bed is 0.4 to 1.5m, the height of the sludge buffer zone is 0.3 to 0.7m, and the height of the sludge blanket is 0.5 to 1.2 m.
7. The carrier filter of claim 6, wherein the suspension carrier bed is filled with suspension carriers, the suspension carriers are at least one of cylindrical, spherical and rectangular, the suspension carriers are made of at least one of HDPE, PE, PUR, PP and PU, and the diameter or side length of the suspension carriers is 10-40 mm.
8. The carrier filter of claim 1 wherein the support screen is a flat screen and the support screen has openings of 8 to 20mm in size.
9. The carrier filter of claim 1, wherein the outlet water intercepting screen is a flat screen or a drum screen, and the size of the opening of the outlet water intercepting screen is 8-20 mm.
10. Use of a carrier filter according to any one of claims 1-9 in the treatment of waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975663.8A CN110585794A (en) | 2019-10-15 | 2019-10-15 | Carrier filter and application thereof in sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975663.8A CN110585794A (en) | 2019-10-15 | 2019-10-15 | Carrier filter and application thereof in sewage treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167218A (en) * | 2020-03-11 | 2020-05-19 | 安徽华骐环保科技股份有限公司 | Filter bead water quality clarification and filtration device and use method thereof |
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| CN203558907U (en) * | 2013-11-22 | 2014-04-23 | 武汉东川自来水科技开发有限公司 | Sewage treatment tank for synchronously precipitating, clarifying and filtering sewage |
| CN208732851U (en) * | 2018-06-29 | 2019-04-12 | 青岛思普润水处理股份有限公司 | A kind of MBBR high standard sewage disposal system |
| CN210905273U (en) * | 2019-10-15 | 2020-07-03 | 青岛思普润水处理股份有限公司 | Carrier filter |
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| CN203295265U (en) * | 2013-06-07 | 2013-11-20 | 大连生源水处理设备发展有限公司 | High-efficiency hydrolysis reactor |
| CN203558907U (en) * | 2013-11-22 | 2014-04-23 | 武汉东川自来水科技开发有限公司 | Sewage treatment tank for synchronously precipitating, clarifying and filtering sewage |
| CN208732851U (en) * | 2018-06-29 | 2019-04-12 | 青岛思普润水处理股份有限公司 | A kind of MBBR high standard sewage disposal system |
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| CN111167218A (en) * | 2020-03-11 | 2020-05-19 | 安徽华骐环保科技股份有限公司 | Filter bead water quality clarification and filtration device and use method thereof |
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