CN112321093A - Separate aeration upflow aerobic granular sludge integrated sewage treatment equipment and method - Google Patents
Separate aeration upflow aerobic granular sludge integrated sewage treatment equipment and method Download PDFInfo
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- CN112321093A CN112321093A CN202011269640.4A CN202011269640A CN112321093A CN 112321093 A CN112321093 A CN 112321093A CN 202011269640 A CN202011269640 A CN 202011269640A CN 112321093 A CN112321093 A CN 112321093A
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- 238000005273 aeration Methods 0.000 title claims abstract description 99
- 239000010802 sludge Substances 0.000 title claims abstract description 96
- 239000010865 sewage Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 186
- 239000004576 sand Substances 0.000 claims abstract description 50
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 230000003179 granulation Effects 0.000 claims abstract description 4
- 238000005469 granulation Methods 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 239000012266 salt solution Substances 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 150000002505 iron Chemical class 0.000 claims description 2
- 230000001706 oxygenating effect Effects 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000001174 ascending effect Effects 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241000108664 Nitrobacteria Species 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004065 wastewater treatment 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses split aeration upflow aerobic granular sludge integrated sewage treatment equipment which comprises a shell, an aeration tank, an upflow reaction tank, a sand filter and a water collecting tank, wherein an aeration disc is arranged at the bottom of the aeration tank; the aeration tank is communicated with the upflow reaction tank through a reaction tank water inlet pipe, water distribution pipes and water distribution heads are uniformly distributed at the bottom of the upflow reaction tank, the openings of the water distribution heads face downwards, and the openings of all the water distribution heads are positioned at the same horizontal height; the water collecting tank is communicated with the aeration tank through a return pipe, and a fine sand layer is arranged in the sand filter tank. In the integrated sewage treatment equipment, the density of the water body at the bottom of the aeration tank is reduced and the pressure intensity is lower in the aeration process, so that the sewage self-circulation flow is realized, and the energy is saved; sewage flows downwards into the upflow reaction tank uniformly, so that sludge deposition is avoided; in the sewage rising process, the sludge is layered according to the rule that the sedimentation performance is strong at the bottom and the sedimentation performance is poor at the top, so that the granulation of the sludge and the increase of the grain size of the aerobic granular sludge are facilitated, and the sewage purification is realized.
Description
Technical Field
The invention relates to sewage treatment equipment and a method, in particular to split aeration upflow aerobic granular sludge integrated sewage treatment equipment and a method.
Background
At present, the mainstream technology of sewage treatment is a traditional activated sludge method, and the process realizes the removal of organic matters, nitrogen and phosphorus by utilizing a microorganism nitrification and denitrification mode. With the development of economy, the requirements of sewage treatment and the types of sewage are continuously increased, and the defects of low impact load resistance and poor harmful substance resistance of the traditional activated sludge are amplified.
The aerobic granular sludge is activated sludge formed by the self-coagulation of microorganisms under the aerobic condition, and compared with the traditional activated sludge, the activated sludge has higher microbial biomass, stronger activity, good settling property, impact load resistance and stronger toxic and harmful substance resistance. However, the prior method for culturing aerobic granular sludge and treating sewage by using the aerobic granular sludge adopts an intermittent water inlet mode, and the method reduces the sewage treatment efficiency to a greater extent. The invention aims to invent aerobic granular sludge sewage treatment equipment which can culture aerobic granular sludge in a short time and can continuously feed in and discharge water to realize high-efficiency sewage treatment.
Disclosure of Invention
The invention provides a split aeration upflow aerobic granular sludge integrated sewage treatment device and a method for overcoming the defects of the technical problems.
The invention discloses split aeration upflow aerobic granular sludge integrated sewage treatment equipment, which comprises a shell, and an aeration tank, an upflow reaction tank, a sand filter and a water collecting tank which are arranged in the shell, wherein an aeration disc is arranged at the bottom of the aeration tank; the shell is provided with a water inlet pipe communicated with the upper part of the aeration tank and a water outlet pipe communicated with the bottom of the sand filter tank; the method is characterized in that: the aeration tank is communicated with the upflow reaction tank through a reaction tank water inlet pipe, one end of the reaction tank water inlet pipe is communicated with the upper part of the aeration tank, and the other end is positioned at the bottom of the upflow reaction tank; a plurality of water distribution pipes are uniformly distributed at the bottom of the upflow reaction tank, the water distribution pipes are communicated with a water inlet pipe of the reaction tank, a plurality of water distribution heads are uniformly distributed on the water distribution pipes, the openings of the water distribution heads face downwards, and the openings of all the water distribution heads are positioned at the same horizontal height;
the water collecting tank is positioned at the upper part of the upflow reaction tank, a plurality of overflow weirs are uniformly arranged above the upflow reaction tank, the upper parts of the overflow weirs are provided with openings, and the end parts of the overflow weirs are provided with overflow ports communicated with the water collecting tank; the water collecting tank is communicated with the aeration tank through a return pipe, one end of the return pipe is communicated with the water collecting tank, and the other end of the return pipe is communicated with the bottom of the aeration tank; the water collecting tank is communicated with the sand filter through a communicating pipe, the communicating pipe is positioned above the return pipe, a fine sand layer for filtering impurities and suspended sludge in water is arranged in the sand filter, and the water outlet pipe is positioned below the fine sand layer.
The invention discloses split aeration upflow aerobic granular sludge integrated sewage treatment equipment, wherein a water distribution tank is arranged above a sand filter, the upper end of the water distribution tank is opened, the bottom of the water distribution tank is provided with a plurality of water leakage holes, and a water collection tank is communicated with the water distribution tank through a communicating pipe.
The split aeration upflow aerobic granular sludge integrated sewage treatment equipment has the advantage that the upper part of the overflow weir is provided with the serrated upper edge which is convenient for water at the top of the upflow reaction tank to uniformly flow out.
The invention discloses split aeration upflow aerobic granular sludge integrated sewage treatment equipment, wherein a medicine storage tank for storing organic carbon source solution or ferric salt solution is arranged in a shell.
The invention discloses split aeration up-flow aerobic granular sludge integrated sewage treatment equipment, wherein the middle part of a return pipe is positioned in a sand filter, a fine sand layer is positioned between the return pipe and the inner wall of the sand filter, and an upper support plate and a lower support plate are respectively arranged above and below the fine sand layer in the sand filter.
The treatment method of the split aeration upflow aerobic granular sludge integrated sewage treatment equipment is characterized by comprising the following steps of:
a) aerating, oxygenating and refluxing, wherein sewage firstly enters an aeration tank through a water inlet pipe, and the aeration of an aeration disc makes the inlet water and the original sewage fully mixed, so that the dissolved oxygen in the water is improved; meanwhile, aeration enables water to rise along with bubbles, the pressure at the bottom of the aeration tank is reduced, and the water in the water collecting tank is forced to flow into the bottom of the aeration tank through a return pipe, so that the sewage self-circulation flow is realized under the condition of no power source;
b) the sewage at the upper part of the aeration tank enters the bottom of the upflow reaction tank through a water inlet pipe of the reaction tank, and the sewage flows downwards through a water distribution head on a water distribution pipe to realize uniform water distribution; sewage flows upwards from the bottom of the upflow reaction tank, sludge at the bottom expands along with the sewage, and the sludge is layered according to the rule that the sedimentation performance is strong at the lower part and the sedimentation performance is poor at the upper part, so that flocculent sludge with poor sedimentation performance flows into an overflow weir along with water flow, and granular sludge with good sedimentation performance is retained in the upflow reaction tank, thereby being beneficial to granulation of the sludge and increase of the grain size of aerobic granular sludge;
c) sewage backflow, wherein sewage containing flocculent sludge entering the overflow weir enters the water collecting tank through the overflow port, most of the sewage in the water collecting tank enters the bottom of the aeration tank through the backflow pipe, and a small part of the sewage flows into the sand filter through the communicating pipe; the suspended sludge contained in the return water is broken through a large amount of aeration, enters the bottom of the upflow reaction tank again and is attached to the granular sludge at the bottom, so that the formation of the granular sludge is promoted;
d) and filtering and flowing out, wherein sewage in the water collecting tank enters the water distribution tank through the communicating pipe, then flows into the sand filter tank through the water leakage holes at the bottom of the water distribution tank, and flows out through the water outlet pipe after being adsorbed and filtered by the fine sand layer from top to bottom.
The invention has the beneficial effects that: according to the integrated sewage treatment equipment, the aeration tank and the upflow reaction tank for forming the granular sludge and purifying the water body are separately arranged, so that the density of the water body at the bottom of the aeration tank is reduced and the pressure intensity is lower in the process that the aeration tank is aerated and oxygenated by the aeration disc at the bottom, the sewage in the water inlet tank automatically flows into the aeration tank through the return pipe, the self-circulation flow of the sewage is further realized, an additional circulating pump is not needed, and the energy is saved; after the sewage entering the upflow reaction tank is distributed by the water distribution pipes and the water distribution heads, the sewage flows out in a downward mode, sludge deposition at the bottom of the upflow reaction tank is avoided, meanwhile, the sewage flows from bottom to top, so that the sludge with poor settling property flows out along with water flow, aerobic granular sludge with good settling property is remained in the upflow reaction tank, organic matters and dissolved oxygen in the water are consumed to realize growth, the particle size of the granular sludge is increased, and the sewage treatment effect is ensured.
Drawings
FIG. 1 is a perspective view of an integrated sewage treatment apparatus of the present invention;
FIG. 2 is a perspective view of the integrated sewage treatment apparatus of the present invention;
FIG. 3 is a top view of the integrated wastewater treatment facility of the present invention;
fig. 4, 5, 6 and 7 are sectional views of the integrated sewage treatment apparatus of the present invention.
In the figure: the device comprises a shell 1, an aeration tank 2, a upflow reaction tank 3, a sand filter 4, a water collecting tank 5, a water inlet pipe 6, a water outlet pipe 7, an aeration disc 8, a reaction tank water inlet pipe 9, a water distribution pipe 10, a water distribution head 11, an overflow weir 12, an overflow port 13, a backflow pipe 14, a water distribution tank 15, a communicating pipe 16, a medicine storage tank 17, an upper edge of 18 sawteeth, a water leakage hole 19, a fine sand layer 20, a lower supporting plate 21 and an upper supporting plate 22.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to fig. 1, 2 and 3, which show a perspective view, a perspective view and a plan view of the integrated sewage treatment device of the present invention, respectively, fig. 4 to 7 show cross-sectional views of the integrated sewage treatment device of the present invention, the sewage treatment device comprises a housing 1, a water inlet pipe 6, a water outlet pipe 7, an aeration tank 2, an upflow reaction tank 3, a water collecting tank 5, a sand filter 4, a drug storage tank 17, an aeration tray 8, a reaction tank water inlet pipe 9, a water distribution pipe 10, an overflow weir 12, a return pipe 14, a water distribution tank 15 and a fine sand layer 20, the aeration tank 2 is arranged at one end of an inner cavity of the housing 1, and the drug storage tank 17 and the sand filter 4 are arranged at two sides of the aeration tank 2. The inlet tube 6 communicates with each other with the upper portion of aeration tank 2, and the quantity of aeration dish 8 is a plurality of, and evenly sets up in the bottom of aeration tank 2, and the water catch bowl 5 communicates with each other with the bottom of aeration tank 2 through back flow 14, under the aeration of aeration dish 8, can realize the intensive mixing of inlet tube 6 intake and back flow 14 return water, increases aquatic dissolved oxygen. Meanwhile, under the aeration action of the aeration disc 8, the water rises along with the bubbles through aeration, the pressure at the bottom of the aeration tank 2 is reduced, and the water in the water collecting tank 5 is forced to flow into the bottom of the aeration tank 2 through the return pipe 14, so that the sewage self-circulation flow is realized under the condition of no power source, and the energy consumption in the sewage purification process is reduced.
The aeration tank 2 is communicated with the upflow reaction tank 3 through a reaction tank water inlet pipe 9, the water inlet of the reaction tank water inlet pipe 9 is communicated with the upper part of the aeration tank 2, and the water outlet end of the reaction tank water inlet pipe 9 is positioned at the bottom of the upflow reaction tank 3. A plurality of water distribution pipes 10 are uniformly distributed at the bottom of the upflow reaction tank 3, one ends of the water distribution pipes 10 are communicated with the water distribution pipes 10, a plurality of water distribution heads 11 are uniformly arranged on each water distribution pipe 10, and the water outlets of the water distribution heads 11 face downwards, so that sewage at the upper part of the aeration tank 2 flows into the water distribution pipes 10 through the water inlet pipe 9 of the reaction tank and then flows downwards through the water distribution heads 11, the sewage flows downwards to prevent sludge from silting at the bottom, and uniform water distribution can ensure that the sludge is not piled up at a place with a small water flow velocity to block a pipeline.
The number of the overflow weirs 12 is multiple, the overflow weirs 12 are uniformly arranged at the upper part of the upflow reaction tank 3, and the overflow weirs 12 are U-shaped grooves with openings at the upper ends; in order to make the sewage uniformly flow into each overflow weir 12 from above the upflow reaction tank 3, the upper edge of each overflow weir 12 is shown as a serrated upper edge 18. The end parts of the overflow weirs 12 are respectively provided with an overflow port 13 communicated with the water collecting tank 5, so that the sewage in the overflow weirs 12 flows into the water collecting tank 5, and the water collecting tank 5 is higher and is positioned at the upper part of the upflow reaction tank 3.
The sewage flows upwards from the bottom of the upflow reaction tank 3, the sludge at the bottom expands along with the sewage, the sludge is layered according to the rule that the sedimentation performance is strong at the lower part and the sedimentation performance is poor at the upper part, and the flocculent sludge rises to the overflow weir 12 along with the water flow and is collected in the water collection tank 5 through the overflow port 13. The size of the ascending flow rate can be determined by the size of the aeration quantity of the aeration tank 2, the larger the aeration quantity is, the larger the sewage circulation quantity in the equipment is, the larger the ascending flow rate is, the size of the ascending flow rate determines the height of sludge expansion, the sludge with poor sedimentation performance is discharged along with water flow, and the granular sludge with good sedimentation performance is screened out, so that the granulation of the sludge and the increase of the grain size of the aerobic granular sludge are facilitated.
The water collecting tank 5 is communicated with the aeration tank 2 through a return pipe 14, the water inlet of the return pipe 14 is communicated with the water collecting tank 5, and the water outlet of the return pipe 14 is communicated with the bottom of the aeration tank 2, so that the sewage in the water collecting tank 5 flows back to the aeration tank 2. The upper part of the sand filter 4 is provided with a water distribution tank 15, the water distribution tank 15 is a U-shaped groove with an opening at the upper end, the bottom of the water distribution tank 15 is provided with a plurality of water leakage holes 19, the water distribution tank 15 also realizes the water collecting function, the water collecting tank 5 is communicated with the water distribution tank 15 through a communicating pipe 16, and the water distribution tank 15 is positioned above the loop pipe 14. The sewage in the water collecting tank 5 flows into the water distributing tank 15 through the communicating pipe 16 and then flows into the sand filter 4 through the water leakage holes 19. A fine sand layer 20 is arranged in the sand filter 4, a lower supporting plate 21 and an upper supporting plate 22 which are used for bearing and positioning the fine sand layer 20 are arranged in the sand filter 4, and water permeable holes are formed in the lower supporting plate 21 and the upper supporting plate 22.
Thus, most of the sewage in the water collecting tank 5 enters the bottom of the aeration tank 2 through the return pipe 14, and a small part of the sewage enters the sand filter tank 4 through the communicating pipe 16 and the water distributing tank 15. In order to reduce the hydraulic loss of sewage circulation in equipment, improve the water circulation frequency and improve the quality of outlet water, under the condition that the size of the sand filter tank 4 is met, the diameter of the return pipe 12 is larger than 200mm, the dissolved oxygen in the return water is fully utilized by microorganisms in the upflow reaction tank 3, the return pipe enters the bottom of the aeration tank 2 and then is oxygenated again, and a large amount of air carried in the outflow water provides oxygen required by growth for aerobic granular sludge. Because the water yield is equal to the water inflow, the larger the aeration amount is, the larger the water flow rate in the equipment is, the larger the reflux amount is, namely the reflux amount can be determined by the aeration amount of the aeration tank 2. The suspended sludge contained in the return water is broken through a large amount of aeration, and can enter the bottom of the upflow reaction tank 3 again and be attached to the granular sludge at the bottom, so that the formation of the granular sludge is promoted.
The sewage entering the sand filter 4 is absorbed and filtered by the fine sand layer 20 from top to bottom to absorb impurities and suspended sludge in the water, and the water flows out through the water outlet pipe 7. The fine sludge adsorbed in the fine sand affects the water outlet rate and the adsorption efficiency, so the communicating pipe 16 needs to be closed periodically, and water is fed through the water outlet pipe 7 for back flushing.
The medicine storage tank 17 can store an organic carbon source and an iron salt solution, and when the pollutant in the inlet water is low, the organic carbon source can be added to supplement nutrient substances required by aerobic microorganisms and nitrobacteria in the upflow reaction tank 3. The ferric salt solution is used for removing the phosphorus element.
The integrated sewage treatment equipment provided by the invention can be used for culturing sludge, and can be used for selectively adding sludge of a common sewage plant, preferably activated sludge of a biochemical pool, so that the culture time of aerobic granular sludge can be greatly shortened. The sludge is heavier than water and has a limited elevation of sludge rise, with a visible sludge layer below the liquid level. The height of a sludge layer is required to be observed frequently during the operation of equipment, sludge in an initial-stage tank is flocculent sludge, the aeration amount is not too high, a large amount of sludge is prevented from being lost, and the sludge is spontaneously condensed into granular sludge at a small ascending flow rate. Along with the descending of the sludge layer, namely the sludge settleability is enhanced, the aeration rate is slowly increased, and the quantity and the particle diameter of the granular sludge are gradually increased. If the sludge in the inlet water is less, the growth of granular sludge is slower, and the sludge layer is lowered to a certain height, the activated sludge of the sewage plant needs to be added into the aeration tank 2 to quickly increase the sludge concentration.
Claims (7)
1. A separate aeration upflow aerobic granular sludge integrated sewage treatment device comprises a shell (1), and an aeration tank (2), an upflow reaction tank (3), a sand filter (4) and a water collection tank (5) which are arranged in the shell, wherein an aeration disc (8) is arranged at the bottom of the aeration tank; the shell is provided with a water inlet pipe (6) communicated with the upper part of the aeration tank and a water outlet pipe (7) communicated with the bottom of the sand filter tank; the method is characterized in that: the aeration tank is communicated with the upflow reaction tank (3) through a reaction tank water inlet pipe (9), one end of the reaction tank water inlet pipe is communicated with the upper part of the aeration tank, and the other end is positioned at the bottom of the upflow reaction tank; a plurality of water distribution pipes (10) are uniformly distributed at the bottom of the upflow reaction tank, the water distribution pipes are communicated with a water inlet pipe (9) of the reaction tank, a plurality of water distribution heads (11) are uniformly distributed on the water distribution pipes, the openings of the water distribution heads face downwards, and the openings of all the water distribution heads are positioned at the same horizontal height;
the water collecting tank (5) is positioned at the upper part of the upflow reaction tank (3), a plurality of overflow weirs (12) are uniformly arranged above the upflow reaction tank, the upper parts of the overflow weirs are provided with openings, and the end parts of the overflow weirs are provided with overflow ports (13) communicated with the water collecting tank; the water collecting tank is communicated with the aeration tank through a return pipe (14), one end of the return pipe is communicated with the water collecting tank, and the other end is communicated with the bottom of the aeration tank; the water collecting tank is communicated with the sand filter (4) through a communicating pipe (16), the communicating pipe is positioned above the return pipe, a fine sand layer (20) for filtering impurities and suspended sludge in water is arranged in the sand filter, and the water outlet pipe (7) is positioned below the fine sand layer.
2. The split aeration upflow aerobic granular sludge integrated sewage treatment equipment as claimed in claim 1, which is characterized in that: a water distribution tank (15) is arranged above the sand filter (4), the upper end of the water distribution tank is open, a plurality of water leakage holes (19) are formed in the bottom of the water distribution tank, and the water collection tank (5) is communicated with the water distribution tank (15) through a communication pipe (16).
3. The split aeration upflow aerobic granular sludge integrated sewage treatment equipment as claimed in claim 1 or 2, which is characterized in that: a serrated upper edge (18) which is convenient for water at the top of the upflow reaction tank (3) to uniformly flow out is arranged above the overflow weir (12).
4. The split aeration upflow aerobic granular sludge integrated sewage treatment equipment as claimed in claim 1 or 2, which is characterized in that: a medicine storage tank (17) for storing organic carbon source solution or iron salt solution is arranged in the shell (1).
5. The split aeration upflow aerobic granular sludge integrated sewage treatment equipment as claimed in claim 1 or 2, which is characterized in that: the middle part of the return pipe (14) is positioned in the sand filter (4), the fine sand layer (20) is positioned between the return pipe and the inner wall of the sand filter, and an upper supporting plate (22) and a lower supporting plate (21) are respectively arranged above and below the fine sand layer in the sand filter.
6. The split aeration upflow aerobic granular sludge integrated sewage treatment equipment as claimed in claim 1 or 2, which is characterized in that: under the condition that the inner diameter of the sand filter (4) meets the requirement, the inner diameter of the return pipe (14) is not less than 200 mm.
7. The treatment method of the split aeration upflow aerobic granular sludge integrated sewage treatment device based on the claim 1 is characterized by comprising the following steps:
a) aerating, oxygenating and refluxing, wherein sewage firstly enters an aeration tank through a water inlet pipe, and the aeration of an aeration disc makes the inlet water and the original sewage fully mixed, so that the dissolved oxygen in the water is improved; meanwhile, aeration enables water to rise along with bubbles, the pressure at the bottom of the aeration tank is reduced, and the water in the water collecting tank is forced to flow into the bottom of the aeration tank through a return pipe, so that the sewage self-circulation flow is realized under the condition of no power source;
b) the sewage at the upper part of the aeration tank enters the bottom of the upflow reaction tank through a water inlet pipe of the reaction tank, and the sewage flows downwards through a water distribution head on a water distribution pipe to realize uniform water distribution; sewage flows upwards from the bottom of the upflow reaction tank, sludge at the bottom expands along with the sewage, and the sludge is layered according to the rule that the sedimentation performance is strong at the lower part and the sedimentation performance is poor at the upper part, so that flocculent sludge with poor sedimentation performance flows into an overflow weir along with water flow, and granular sludge with good sedimentation performance is retained in the upflow reaction tank, thereby being beneficial to granulation of the sludge and increase of the grain size of aerobic granular sludge;
c) sewage backflow, wherein sewage containing flocculent sludge entering the overflow weir enters the water collecting tank through the overflow port, most of the sewage in the water collecting tank enters the bottom of the aeration tank through the backflow pipe, and a small part of the sewage flows into the sand filter through the communicating pipe; the suspended sludge contained in the return water is broken through a large amount of aeration, enters the bottom of the upflow reaction tank again and is attached to the granular sludge at the bottom, so that the formation of the granular sludge is promoted;
d) and filtering and flowing out, wherein sewage in the water collecting tank enters the water distribution tank through the communicating pipe, then flows into the sand filter tank through the water leakage holes at the bottom of the water distribution tank, and flows out through the water outlet pipe after being adsorbed and filtered by the fine sand layer from top to bottom.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072181A (en) * | 2021-04-03 | 2021-07-06 | 陈波 | Separate aeration upflow sludge blanket integration sewage treatment device |
| WO2023108598A1 (en) * | 2021-12-15 | 2023-06-22 | 北京工业大学 | Wastewater treatment process based on upflow independent-aeration self-circulation high-column aerobic sludge bed |
| CN120463327A (en) * | 2025-07-14 | 2025-08-12 | 安徽华骐环保科技股份有限公司 | Device and method for aerobic granular sludge cultivation |
Citations (4)
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