CN113716682A - Aerobic granular sludge sewage treatment system - Google Patents
Aerobic granular sludge sewage treatment system Download PDFInfo
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- CN113716682A CN113716682A CN202110894329.7A CN202110894329A CN113716682A CN 113716682 A CN113716682 A CN 113716682A CN 202110894329 A CN202110894329 A CN 202110894329A CN 113716682 A CN113716682 A CN 113716682A
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- 239000010802 sludge Substances 0.000 title claims abstract description 106
- 239000010865 sewage Substances 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000005842 biochemical reaction Methods 0.000 claims abstract description 62
- 238000005273 aeration Methods 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 abstract description 6
- 230000006378 damage Effects 0.000 abstract description 4
- 238000012258 culturing Methods 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract description 2
- 238000010992 reflux Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 12
- 230000006872 improvement Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 241001453382 Nitrosomonadales Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000004912 1,5-cyclooctadiene Substances 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
-
- 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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention relates to an aerobic granular sludge sewage treatment system, which comprises a biochemical reaction tank, a circulating unit, a sludge-water separation device and a steam stripping sludge discharge pipe, wherein the biochemical reaction tank comprises a water inlet aeration unit, a grating unit, the circulating unit, the sludge-water separation device and the steam stripping sludge discharge pipe; the circulating unit returns the sewage at the middle upper part of the tank to the bottom of the tank body, the circulating pump in the circulating unit is arranged at the middle upper part of the biochemical reaction tank, the shearing damage to the granular sludge at the lower part can be avoided, the pulse hydraulic condition is improved, the quick screening of the granular sludge is further realized, the water distributor is of a rotary type, the rotational flow is provided for the sewage in the tank, and the rotational flow and the rising flow act together, so that the granular sludge is more favorably produced. The invention can realize biochemical reaction in the biochemical reaction tank, realizes the reflux of sludge in the same tank, does not have a secondary sedimentation tank, and realizes the purposes of simplifying the biochemical reaction tank and culturing and producing granular sludge.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to an aerobic granular sludge sewage treatment system.
Background
The activated sludge process is the most common sewage treatment process for nitrogen and phosphorus removal of sewage, and the core of the activated sludge process is flocculent activated sludge. The density of the flocculent activated sludge is low, a secondary sedimentation tank is required to be arranged in the general AAO process, the surface load design range of the secondary sedimentation tank is 0.6-1.0m for cultivation/square meter.h, and the maximum sludge concentration in the AAO process reaction tank capable of continuously feeding and discharging water can only be 3000 plus 5000 mg/L. Due to the characteristics of the flocculent activated sludge, the sludge concentration in the reaction tank is not too high. The SBR process can realize complete static sedimentation during sedimentation due to reaction and sedimentation in a tank body, theoretically, the SBR process can maintain high sludge concentration, but flocculent activated sludge with high concentration has low density, sedimentation performance limits the sludge concentration of the SBR system, and the sludge concentration of the SBR process is not too high.
In order to improve the COD load in unit volume and reduce the occupied area and the investment cost, the sewage treatment technology develops a plurality of modes for increasing the sludge concentration, for example, the technologies of increasing fillers, adopting an MBBR (moving bed biofilm reactor) process, adopting an MBR (membrane bioreactor) membrane process to realize complete separation of sludge and water retention time and the like. Although the sludge concentration of unit tank volume can be increased, and the sewage treatment capacity and the effluent quality can be improved, the operation cost is greatly increased by MBBR technology and MBR technology, and the development of the sewage treatment technology aims at improving the effluent quality and quantity and reducing the operation cost per ton of water. The MBR process and the MBBR process have relatively high cost, and the flocculent sludge biological treatment technology is utilized in the sludge property classification.
The aerobic granular sludge is a novel sewage treatment technology, has excellent sedimentation performance, more microbial biomass, higher microbial concentration, more reasonable microbial community structure, stronger impact load resistance and smaller occupied area. At present, a plurality of application cases of aerobic granular sludge exist. Aerobic granular sludge technology is superior to traditional activated sludge processes in many ways.
The aerobic granular sludge is sludge with a layered structure, the internal structure of the sludge can be divided into an aerobic layer, an anoxic layer and an anaerobic layer from outside to inside, and the aerobic granular sludge forms a three-dimensional layered microbial community and contains phosphorus accumulating bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying heterotrophic bacteria and even anaerobic ammonia oxidizing bacteria. The layered structure of the aerobic granular sludge enables the granular sludge to be formed through the diffusion and mass transfer of the substrate, and COD and nitrogen and phosphorus are removed. The load and the sedimentation speed of the aerobic granular sludge are far higher than those of flocculent sludge, so that the volumes of the biochemical tank and the secondary sedimentation tank can be reduced.
In view of the above, it is necessary to develop a sewage treatment technology capable of culturing and utilizing granular sludge in a sewage biochemical treatment process.
Disclosure of Invention
The invention provides an aerobic granular sludge sewage treatment system, which aims to solve the problems of simplifying a biochemical reaction tank and culturing and recycling granular sludge in the prior art.
The aerobic granular sludge sewage treatment system adopts the following technical scheme: an aerobic granular sludge sewage treatment system, comprising a biochemical reaction tank, wherein the biochemical reaction tank comprises:
the water inlet aeration unit comprises a water inlet pipe for supplying water to the biochemical reaction tank, an air inlet pipe for supplying air to the biochemical reaction tank and an aeration device which is arranged at the bottom of the biochemical reaction tank and is connected with the air inlet pipe;
the grating unit is arranged in the biochemical reaction tank and used for intercepting suspended matters in the water;
the circulating unit is arranged on a water distributor at the bottom of the biochemical reaction tank and a mixed liquid return pipe for conveying the sewage above the biochemical reaction tank to the water distributor, and the mixed liquid return pipe is provided with a circulating pump;
the mud-water separation device is arranged in the biochemical reaction tank and above the mixed liquid return pipe, and can realize mud-water separation while avoiding disturbance of bubbles and hydraulic cyclone on sedimentation.
As a refinement, the grid unit comprises a cylindrical basket-like grid.
As a refinement, the water distributor comprises a central pipe and a rotating assembly, and the rotating assembly comprises a water distribution pipeline communicated with the central pipe.
As an improvement, a stripping sludge discharge pipe for discharging redundant granular sludge is also arranged in the biochemical reaction tank.
As an improvement, a rotational flow eliminating grid is arranged above the turbid flow return pipe and below the mud-water separation device in the biochemical reaction tank.
As an improvement, the water inlet aeration unit comprises a water inlet flow meter arranged on the water inlet pipe, an aeration air flow meter arranged on the air inlet pipe, and a PLC controller in control connection with the water inlet flow meter and the aeration air flow meter.
As an improvement, the aerobic granular sludge sewage treatment system also comprises a UF tank for purifying the effluent of the sludge-water separation device, and the UF tank is internally provided with a UF membrane group.
As an improvement, the aerobic granular sludge sewage treatment system also comprises a dosing backwashing tank for feeding effluent of the UF tank.
As an improvement, the aerobic granular sludge sewage treatment system also comprises a grid channel and an adjusting tank, and sewage from a sewage pipe network sequentially flows into the grid channel, the adjusting tank and the biochemical reaction tank.
As an improvement, one side of the adjusting tank is provided with a sludge tank for receiving sludge discharged by a stripping sludge discharge pipe and a UF tank.
The invention has the beneficial effects that:
the invention provides an aerobic granular sludge sewage treatment system which comprises a biochemical reaction tank, wherein the biochemical reaction tank comprises a water inlet aeration unit, a grating unit, a circulating unit, a mud-water separation device and a steam stripping sludge discharge pipe; the circulation unit returns the sewage at the middle upper part of the tank to the bottom of the tank body, in order to have higher shearing force, a circulation pump in the circulation unit is arranged at the middle upper part of the biochemical reaction tank, so that the shearing damage to the granular sludge at the lower part can be avoided, the pulse hydraulic condition is improved, and the quick screening of the granular sludge is further realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a biochemical reaction tank of an aerobic granular sludge sewage treatment system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of a water distributor and an aeration device of a biochemical reaction tank of an aerobic granular sludge sewage treatment system according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of an aerobic granular sludge sewage treatment system according to the present invention;
reference numerals:
1. the device comprises a biochemical reaction tank, 11, a water inlet pipe, 12, an air inlet pipe, 13, a stripping sludge discharge pipe, 14, a sludge-water separation device, 15, a cylindrical basket-shaped grid, 16, a cyclone eliminating grid, 17, a telescopic connecting pipe, 18, a biochemical reaction tank body foundation, 2, a PLC control system, 21, a water inlet flow meter, 22, an aeration air flow meter, 23, a PLC controller, 3, an aeration device, 4, a water distributor, 41, a mixed liquid return pipe, 42, a water distribution pipeline, 43, a circulating pump, 5, a UF tank, 51, a UF membrane frame, 52, a sludge discharge pipe, 53, a drain pipe, 54, an air inlet pipe, 55, a water production pump, 56, a fan, 57, a UF tank body foundation, 6, a dosing backwashing tank, 61, a device room, 62, a PLC intelligent control power distribution cabinet, 63, a water outlet channel, 7, a grid channel, 8, a regulating pool, 9 and a sludge pool.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms than those herein described and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, an embodiment of an aerobic granular sludge sewage treatment system of the present invention includes a biochemical reaction tank 1, the biochemical reaction tank 1 includes a water inlet aeration unit, a grating unit, a circulation unit, a mud-water separation device 14, and a stripping sludge discharge pipe 13, in this embodiment, a water inlet pipe 11 of the biochemical reaction tank 1 conveys sewage to the bottom of the tank, and the mud-water separation device 14 extracts granular sludge at the bottom of the tank for recycling as a product; the sewage of middle and upper portion flows back to the bottom of jar body again with the jar in the circulation unit, in order to have higher shearing force, circulation pump 43 among the circulation unit sets up the middle and upper portion at biochemical reaction jar 1, can avoid the shearing destruction to lower part granule mud to improve pulse water conservancy condition, and then realize the quick screening of granule mud, water-locator 4 is the rotation type, and the kinetic energy of intaking provides whirl power again for jar sewage, and whirl and rising flow combined action are favorable to the production of granule mud more.
In the embodiment, the biochemical reaction tank 1 is vertical, and the height-diameter ratio (H/D) of the reactor is (1: 1) - (2: 1); when in operation, adding 140-200 mesh active carbon or filler as carrier; the carrier density was slightly less than 1.0. After the carrier is used as a core to form granular sludge, the granular sludge should be slightly larger than 1.
The water inlet aeration unit comprises a water inlet pipe 11 for supplying water to the biochemical reaction tank 1, an air inlet pipe 12 for supplying air to the biochemical reaction tank 1 and an aeration device 3 which is arranged at the bottom of the biochemical reaction tank 1 and is connected with the air inlet pipe 12, wherein in the embodiment, one branch pipe of the air inlet pipe 12 is connected to the aeration device 3, and the other branch pipe is connected to a stripping sludge discharge pipe 13. The aeration device 3 is a disc type in the embodiment, and in other embodiments, the aeration device can be a plate type aeration device or a pipe type aeration device or other forms which are in the prior art.
And the grating unit is arranged in the biochemical reaction tank 1 and is used for intercepting fine suspended matters in the water inlet pipe 11. In this embodiment, the grid unit comprises a cylindrical basket-shaped grid 15, and the grid unit is mainly configured to assist in removing suspended matter and ensuring uniform water intake for suction and backflow, thereby reducing the flow rate.
The circulating unit is arranged on the water distributor 4 at the bottom of the biochemical reaction tank 1 and a mixed liquid return pipe 41 used for conveying the sewage above the biochemical reaction tank 1 to the water distributor 4, and a circulating pump 43 is arranged on the mixed liquid return pipe 41. In this embodiment, the circulation pump 43 is a micro axial flow pump and is disposed at the middle upper portion of the biochemical reaction tank 1.
The water distributor 4 is of a rotary type and comprises a central pipe and a rotary component, and the rotary component comprises a water distribution pipeline 42 communicated with the central pipe. Specifically, the water distribution pipes 42 are arc-shaped, and a plurality of water distribution pipes 42 are arranged around the central pipe in a central symmetry manner. The hydraulic enhancement condition of the rotational flow ensures that the shearing strength is more than 2 cm.S < -1 >, and is more beneficial to the formation of granular sludge. The rotary water distributor 4 can realize uniform pressure to each branch pipe (i.e. the water distribution pipeline 42), and the water yield is relatively uniform.
And a cyclone eliminating grating 16 arranged in the biochemical reaction tank 1 at a position above the turbidity current backflow pipe and below the mud-water separation device 14, and provided with a strip-shaped grating plate for eliminating the upper cyclone and reducing the influence on the precipitation, wherein in the embodiment, the cyclone eliminating grating 16 is specifically strip-shaped.
And the mud-water separation device 14 is arranged in the biochemical reaction tank 1 and is positioned above the mixed liquid return pipe 41, so that disturbance of bubbles and hydrocyclone on sedimentation is avoided.
The steam stripping sludge discharge pipe 13 is used for recycling redundant granular sludge at the bottom of the biochemical reaction tank 1 as a product, avoiding breaking the granular sludge by adopting a pump, a branch pipe connected with the steam stripping sludge discharge pipe 13 is provided with an electromagnetic valve for controlling air volume, and the PLC 23 controls the air volume by controlling the opening degree of the electromagnetic valve so as to adjust the sludge discharge speed.
The biochemical reaction tank 1 in the embodiment can adopt a semi-underground design or a full-underground design, and the aeration device 3 is provided with an aeration air regulating valve; the steam stripping sludge discharge pipe 13 is also provided with a butterfly valve, and the sludge discharge amount is controlled by controlling the opening of the butterfly valve.
Referring to fig. 1 again, the PLC control system 2 includes a water inlet aeration unit including a PLC control system 21 disposed on the water inlet pipe 11, an aeration air flow meter 22 disposed on the air inlet pipe 12, and a PLC controller 23 in control connection with the PLC control system 21 and the aeration air flow meter 22, wherein the PLC control system 21 and the aeration air flow meter 22 feed data back to the PLC controller 23, and the water inlet amount and the aeration air flow are controlled by controlling the opening degree of the electromagnetic valve through analysis processing. The PLC control system 2 in the embodiment feeds back the parameters in the aerobic granular sludge sewage treatment system to each corresponding electromagnetic valve through analysis and treatment, so that the automatic operation of the system, water quality on-line detection, video monitoring, remote data transmission, control and the like can be realized by the Internet of things technology and the informatization technology. It should be noted that the specific control principle is a technology disclosed in the art, for example, patent No. 2014104937117, entitled accurate control method of total aeration amount of sewage treatment plant, and patent No. 2010202976951 entitled dual-parameter aeration control system for sewage treatment system, and those skilled in the art can connect to an intelligent water service platform according to scene requirements, or can connect to a field monitoring system, an on-line detection system, and other systems individually, and adopt a remote management function of mobile phone APP and PC terminal.
Referring to fig. 2 and 3, the UF tank 5 (i.e., an ultrafiltration tank), the aerobic granular sludge sewage treatment system further includes a UF tank 5 for purifying the effluent of the sludge-water separation device 14, and the UF tank 5 is provided with a UF membrane frame 51. In this embodiment, the UF tank 5 is connected to the biochemical reaction tank 1 through the telescopic connection pipe 17, a sludge discharge pipe 52, a water discharge pipe 53 and an air intake pipe 54 are provided in the UF tank 5, and a sludge discharge valve on the sludge discharge pipe 52, an electromagnetic valve on the water discharge pipe 53 and an air intake valve on the air intake pipe 54 are all in control connection with the PLC controller 23.
And the dosing backwashing tank 6 is used for dosing the backwashing tank 6 to the effluent of the UF tank 5.
The aerobic granular sludge sewage treatment system provided by the embodiment further comprises a grid channel 7 and an adjusting tank 8, and sewage from a sewage pipe network flows into the grid channel 7, the adjusting tank 8 and the biochemical reaction tank 1 in sequence. One side of the adjusting tank 8 is provided with a sludge tank 9 for receiving the sludge discharged by the stripping sludge discharge pipe 13 and the UF tank 5.
The aerobic granular sludge sewage treatment system provided by the embodiment only carries out biochemical reaction in the biochemical reaction tank 1, and the sludge is separated and reflowed in the same tank without a secondary sedimentation tank; the surface load of the precipitation zone can completely meet the requirements; the circulating unit is arranged at a proper position, so that the damage to the granular sludge is reduced as much as possible, and the granular sludge in the biochemical reaction tank 1 can be used as a product instead of sludge needing additional treatment; the volume of the biochemical reaction tank 1 is reduced by 30-40% compared with the common SBR reactor or AAO reactor; the PLC control system realizes automatic management and continuous operation.
It should be noted that the biochemical reaction tank can adopt glass fiber reinforced plastic integrated equipment, and can also adopt a structure made of steel or concrete, and a single biochemical reaction tank can be square or round; the aerobic granular sludge sewage treatment system provided by the invention can be installed in box-type integrated equipment and also can be used as a mobile field test device; the water distributor 4 can be provided with 2 water distribution pipelines 42 to realize water outlet in 2 directions, and can also be provided with more outlets, and the number of the outlets depends on the size of the biochemical reactor; in other embodiments, the aeration device may be a plate aeration or a tube aeration.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides an aerobic granule mud sewage treatment system, includes biochemical reaction jar, its characterized in that, biochemical reaction jar includes:
the water inlet aeration unit comprises a water inlet pipe for supplying water to the biochemical reaction tank, an air inlet pipe for supplying air to the biochemical reaction tank and an aeration device which is arranged at the bottom of the biochemical reaction tank and is connected with the air inlet pipe;
the grating unit is arranged in the biochemical reaction tank and used for intercepting suspended matters in the water;
the circulating unit is arranged on a water distributor at the bottom of the biochemical reaction tank and a turbid water return pipe used for conveying the mixed liquid above the biochemical reaction tank to the water distributor, and the mixed liquid return pipe is provided with a circulating pump;
and the mud-water separation device is arranged in the biochemical reaction tank and is positioned above the mixed liquid return pipe, and is used for avoiding disturbance of bubbles and hydraulic cyclone on sedimentation and realizing mud-water separation.
2. The aerobic granular sludge sewage treatment system as claimed in claim 1 wherein the grid unit comprises a cylindrical basket grid.
3. The aerobic granular sludge sewage treatment system as claimed in claim 1, wherein the water distributor comprises a central pipe and a rotating assembly, and the rotating assembly comprises a water distribution pipe communicated with the central pipe.
4. The aerobic granular sludge sewage treatment system as claimed in claim 1, wherein the biochemical reaction tank is further provided with a stripping sludge discharge pipe for discharging excess granular sludge.
5. The aerobic granular sludge sewage treatment system as claimed in claim 1, wherein a cyclone eliminating grille is arranged in the biochemical reaction tank above the turbidity current return pipe and below the sludge-water separation device.
6. The aerobic granular sludge sewage treatment system as claimed in claim 1, wherein the water inlet aeration unit comprises a water inlet flow meter arranged on the water inlet pipe, an aeration air flow meter arranged on the air inlet pipe, and a PLC controller in control connection with the water inlet flow meter and the aeration air flow meter.
7. The aerobic granular sludge sewage treatment system as claimed in any one of the claims 1 to 6, which further comprises a UF tank for purifying the effluent of the sludge-water separation device, wherein the UF tank is provided with a UF membrane rack.
8. The aerobic granular sludge sewage treatment system as claimed in any one of the claims 1 to 6, wherein the aerobic granular sludge sewage treatment system further comprises a backwash tank for dosing backwash of the module of the UF tank.
9. The aerobic granular sludge sewage treatment system as claimed in any one of the claims 1 to 6, which further comprises a grid channel and a regulating tank, wherein the sewage from the sewage pipe network flows into the grid channel, the regulating tank and the biochemical reaction tank in sequence.
10. The aerobic granular sludge sewage treatment system as claimed in claim 7, wherein one side of said adjusting tank is provided with a sludge tank for receiving the sludge discharged from the stripping sludge discharge pipe and the UF tank.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115650519A (en) * | 2022-11-10 | 2023-01-31 | 华夏碧水环保科技股份有限公司 | Traditional chinese medicine waste water treatment integrated system |
| CN117125813A (en) * | 2023-10-08 | 2023-11-28 | 武汉格林环源净化工程有限公司 | Device and method for strengthening activated sludge in aerobic tank |
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| CN117125813B (en) * | 2023-10-08 | 2024-02-06 | 武汉格林环源净化工程有限公司 | Device and method for strengthening activated sludge in aerobic tank |
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