CN112408597A - Separate aeration upflow sludge blanket integrated sewage treatment equipment - Google Patents
Separate aeration upflow sludge blanket integrated sewage treatment equipment Download PDFInfo
- Publication number
- CN112408597A CN112408597A CN202011269603.3A CN202011269603A CN112408597A CN 112408597 A CN112408597 A CN 112408597A CN 202011269603 A CN202011269603 A CN 202011269603A CN 112408597 A CN112408597 A CN 112408597A
- Authority
- CN
- China
- Prior art keywords
- sewage
- aeration
- tank
- sludge
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- 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
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
-
- 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
Landscapes
- 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)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a split aeration upflow sludge blanket integrated sewage treatment device, which comprises an aeration tank, a biochemical reaction tank and a water collecting tank, wherein aeration in the aeration tank is power for sewage circulation of the device, and the size of aeration determines the size of reflux, the type of microorganisms in the biochemical reaction tank and the sewage treatment effect; the biochemical reaction tank is a main place for microbial growth and pollutant treatment, sludge in the tank is layered under the control of the ascending flow rate and the dissolved oxygen amount in water, the lower layer is mainly aerobic granular sludge with good sedimentation performance, the upper layer is sludge with poor sedimentation performance attached with a large amount of denitrifying bacteria, nitrogen elements and organic matters are removed through aerobic microbial oxidation and anaerobic bacteria denitrification, water flow is circulated for many times, and the treatment effect of equipment is improved. The method adopts a separate aeration mode to realize aerobic granular sludge culture and sewage treatment by using the aerobic granular sludge, and controls the aeration quantity to ensure that various sludge and reactions in a biochemical area coexist and realize the high-efficiency removal of pollutants.
Description
Technical Field
The invention relates to sewage treatment equipment, in particular to split aeration upflow sludge blanket integrated sewage treatment equipment.
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 an integrated sewage treatment device which can culture aerobic granular sludge and other anaerobic microorganisms in a short time and can realize high-efficiency and stable operation.
Disclosure of Invention
The invention provides a split aeration upflow sludge blanket integrated sewage treatment device in order to overcome the defects of the technical problems.
The invention discloses a separated aeration upflow sludge blanket integrated sewage treatment device, which comprises a water inlet pipe, an aeration tank, a biochemical reaction tank, a water collecting tank and a water outlet pipe, wherein the water inlet pipe is used for introducing sewage to be treated into the aeration tank; the method is characterized in that: the aeration tank is communicated with the biochemical 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, the other end of the reaction tank water inlet pipe extends into the bottom of the biochemical reaction tank, a water distribution pipe is communicated with a reaction tank water inlet pipe extending into the bottom of the biochemical reaction tank, and a plurality of water distribution heads with downward water outlets are uniformly arranged on the water distribution pipe; the water inlet groove is positioned above one side of the biochemical reaction tank, a plurality of horizontal overflow weirs are uniformly arranged above the biochemical reaction tank, and the end parts of the overflow weirs are provided with overflow ports communicated with the water collecting groove; the water collecting tank is communicated with the aeration tank through a return pipe, a water inlet of the return pipe is communicated with the water inlet tank, a water outlet of the return pipe is communicated with the bottom of the aeration tank, and a water outlet pipe is arranged on the water collecting tank; sludge and sludge particles are inoculated in the biochemical reaction tank;
the sewage entering through the water inlet pipe is mixed with the original sewage in the aeration tank and is aerated and oxygenated through the aeration disc, the aerated sewage expands to reduce the density and the pressure of the sewage at the bottom of the aeration tank, and the sewage in the water collecting tank flows into the bottom of the aeration tank under the action of pressure difference; aerating to raise the liquid level in the aeration tank, allowing sewage in the aeration tank to flow into the water distribution pipe through the water inlet pipe of the reaction tank under the action of liquid level difference, allowing the sewage to flow out through the water distribution head and then to be uniformly distributed at the bottom of the biochemical reaction tank, allowing the sewage to undergo aerobic reaction under the action of microorganisms in aerobic granular sludge at the bottom in the process of rising in the biochemical reaction tank to remove organic matters and ammonia nitrogen in water, and allowing the sewage to undergo anaerobic reaction under the action of microorganisms in anaerobic sludge at the upper part so as to convert oxidized nitrogen into nitrogen for removal through denitrification; the sludge at the upper end of the biochemical reaction tank flows into the water collecting tank through the overflow weir, most of the sewage entering the water collecting tank flows back to the aeration tank through the return pipe, and the rest is discharged through the water outlet pipe.
According to the separated aeration upflow sludge blanket integrated sewage treatment equipment, the water outlets of all the water distribution heads on the water distribution pipe are positioned on the same horizontal plane, so that the water outlets of the water distribution heads disperse sludge at the bottom of the biochemical reaction tank to prevent sludge from silting.
The separated aeration upflow sludge blanket integrated sewage treatment equipment is characterized in that the overflow weir is in a groove shape with an opening at the upper end, and the upper ends of two sides of the groove-shaped overflow weir are both provided with sawtooth-shaped upper edges, so that sewage at the upper part of the biochemical reaction tank uniformly flows into each overflow weir.
According to the separated aeration upflow sludge blanket integrated sewage treatment equipment, the inner diameter of the return pipe is 5-10 times of the inner diameter of the water outlet pipe, and the lowest position of the water outlet pipe is higher than the highest position of the water inlet of the return pipe.
According to the separately-arranged aeration upflow sludge blanket integrated sewage treatment equipment, the overflow port and the bottom of the water collecting tank have a height difference, so that flocculent sludge entering the water collecting tank along with sewage and sludge with poor settling property are settled and accumulated to a certain amount and then enter the aeration tank along with the sewage.
The split aeration upflow sludge blanket integrated sewage treatment equipment has the advantages that the diameters of the water inlet pipe and the return pipe of the reaction tank are larger than 200 mm.
The separated aeration upflow sludge blanket integrated sewage treatment equipment is characterized in that an overflow pipe communicated with a water collecting tank is arranged above a water outlet pipe.
The treatment method of the separated aeration upflow sludge blanket integrated sewage treatment equipment is characterized by comprising the following steps of:
a) aerating and refluxing, wherein sewage to be treated enters an aeration tank through a water inlet pipe, aeration and oxygenation are carried out under the action of an aeration disc, the aerated sewage rises and expands to reduce the density of the sewage in the aeration tank, the sewage in a water collecting tank flows into the aeration tank through a return pipe under the action of pressure difference, and the aeration of the aeration disc promotes the automatic circulation of the sewage in the whole sewage treatment equipment;
b) granular sludge is formed and aerobically reacts, aeration is carried out to ensure that the liquid level in the aeration tank rises, under the action of liquid level difference, sewage at the upper part of the aeration tank flows into the water distribution pipe through the water inlet pipe of the reaction tank and flows out through the water distribution head, and the uniform distribution of the entering sewage at the bottom of the biochemical reaction tank is realized; sludge culture is carried out in the early stage, and in the process that sewage rises in a biochemical reaction tank, sludge is broken under the action of water flow shearing force and is distributed in a state that granular sludge with good settling property is below flocculent sludge with poor settling property; after the granular sludge is formed, the sewage entering the bottom of the biochemical reaction tank is subjected to aerobic reaction under the action of microorganisms in the granular sludge, organic matters and ammonia nitrogen in the water are removed, and the ammonia nitrogen is converted into oxidized nitrogen;
c) anaerobic reaction, wherein the upper part of the biochemical reaction tank is in an anaerobic state along with the rising of sewage and the continuous consumption of dissolved oxygen, anaerobic reaction is carried out under the action of anaerobic microorganisms in sludge, and oxidized nitrogen is converted into nitrogen to be removed through denitrification; meanwhile, along with long-time operation, the grain size of the aerobic granular sludge is gradually increased, so that the central area of the aerobic granular sludge is an anoxic area, microorganisms begin to be converted into anaerobic microorganisms in the anoxic area, and part of nitrate nitrogen and organic matters oxidized by external aerobic microorganisms directly enter the granules for denitrification to realize partial denitrification;
d) the sewage flows back and is discharged, the sewage at the upper part of the biochemical reaction tank and a certain amount of carried flocculent sludge flow into the water collecting tank through the overflow weir, most of the sewage entering the water collecting tank flows into the aeration tank through the return pipe, and a small part of the sewage is discharged through the water outlet pipe; and the sewage reflowing to the aeration tank is oxygenated and then enters the biochemical reaction tank again for purification treatment, and the sewage is circularly treated for dozens of times and then reaches the discharge standard and is discharged.
The invention has the beneficial effects that: according to the sewage treatment equipment, the aeration tank and the biochemical reaction tank are separately arranged and are communicated through the water inlet pipe of the reaction tank, under the aeration action of the aeration disc, the oxygenation and stirring mixing of inlet water and return water are realized, the density of the sewage is reduced after the sewage is oxygenated and expanded, the pressure at the bottom of the aeration tank is reduced, and the sewage in the water collecting tank enters the aeration tank through the return pipe under the action of pressure difference, so that the sewage is refluxed; meanwhile, the liquid level of the aeration tank rises due to aeration, and sewage in the aeration tank enters the biochemical reaction tank through the water inlet pipe of the reaction tank under the action of the liquid level difference, so that the aeration not only realizes oxygenation and stirring, but also provides a power source for automatic circulation of the sewage in the whole device, a circulating device is not required to be additionally arranged, and the energy consumption in the sewage treatment process is reduced.
The sewage is uniformly distributed and then uniformly ascends in the biochemical reaction tank, the sewage in the biochemical reaction tank at the earlier stage realizes sludge culture under the action of the shearing force of ascending water flow, the granular sludge is distributed in a state that the granular sludge is below and the flocculent sludge is above, the sewage entering the biochemical reaction tank firstly carries out aerobic reaction under the action of microorganisms in the aerobic granular sludge, organic matters and ammonia nitrogen in the sewage are consumed, and the ammonia nitrogen is converted into oxidized nitrogen; the upper part of the biochemical reaction tank is in an anaerobic state, anaerobic reaction is carried out under the action of microorganisms in the sludge, and the oxidized nitrogen is converted into nitrogen to be removed through denitrification, so that the aerobic and anaerobic integrated treatment of the sewage is realized, and finally the effluent reaches the discharge standard.
Drawings
FIG. 1 is a front view of the integrated sewage treatment plant of the present invention with separate aeration and upflow sludge blanket;
FIG. 2 is a rear view of the integrated sewage treatment plant of the present invention with separate aeration and upflow sludge blanket;
FIG. 3 is a top view of the integrated sewage treatment plant of the present invention with separate aeration and upflow sludge blanket;
FIG. 4 is a left side view of the integrated sewage treatment apparatus of the present invention;
FIG. 5 is a perspective view of the integrated sewage treatment apparatus of the present invention with separate aeration and upflow sludge blanket;
FIG. 6 and FIG. 7 are sectional views of the integrated sewage treatment apparatus of the present invention.
In the figure: 1 water inlet pipe, 2 aeration tanks, 3 reaction tank water inlet pipes, 4 biochemical reaction tanks, 5 water collecting tanks, 6 backflow pipes, 7 water outlet pipes, 8 aeration discs, 9 water distribution pipes, 10 water distribution heads, 11 overflow weirs, 12 overflow ports, 13 overflow pipes and 14 sawtooth-shaped upper edges.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1 to 5, a front view, a rear view, a top view, a left view and a perspective view of the split aeration upflow sludge blanket integrated sewage treatment device of the invention are respectively given, fig. 6 and 7 are both given cross-sectional views thereof, the integrated sewage treatment device is composed of a water inlet pipe 1, an aeration tank 2, a reaction tank water inlet pipe 3, a biochemical reaction tank 4, a water collecting tank 5, a backflow pipe 6, a water outlet pipe 7, an aeration disc 8, a water distribution pipe 9 and an overflow weir 11, the water inlet pipe 1 is communicated with the top of the aeration tank 2 and is used for introducing sewage to be treated into the aeration tank 2. The aeration disc 8 is arranged at the bottom of the aeration tank 2, and the aeration tank 2 and the biochemical reaction tank 4 are arranged separately; the number of the water distribution pipes 9 is multiple, the water distribution pipes 9 are evenly arranged at the bottom of the biochemical reaction tank 4, the aeration tank 2 is communicated with the biochemical reaction tank 4 through the reaction tank water inlet pipe 3, the water inlet of the reaction tank water inlet pipe 3 is communicated with the upper end of the aeration tank 2, and the water outlet end of the reaction tank water inlet pipe 3 extends to the bottom of the biochemical reaction tank 4 and is communicated with the water distribution pipes 9. The water collecting tank 5 is communicated with the bottom of the aeration tank 2 through a return pipe 6.
The sewage entering through the water inlet pipe 1 is mixed with the original sewage in the aeration tank 2, oxygenation and stirring are carried out under the aeration action of the aeration disc 8, the sewage in the aeration tank 2 expands along with the aeration in the rising process to reduce the density, so that the pressure at the bottom of the aeration tank 2 is reduced, and the sewage in the water collecting tank 5 flows into the aeration tank 2 through the return pipe 6 under the action of pressure difference. The liquid level in the aeration tank 2 rises through aeration, and under the action of the liquid level difference, the sewage at the upper part of the aeration tank 2 flows into a water distribution pipe 9 at the bottom of a biochemical reaction tank 4 through a reaction tank water inlet pipe 3. Therefore, the aeration of the aeration disc 8 at the bottom of the aeration tank 2 not only realizes the oxygenation and the stirring of the sewage, but also pushes the sewage to flow circularly and power sources in the aeration tank 2 → the biochemical reaction tank 4 → the water collecting tank 5 → the aeration tank 2, the automatic circular flow of the sewage can be realized without adding a circulating pump, and the energy consumption in the sewage treatment process is reduced.
A plurality of water distribution heads 10 are arranged on each water distribution pipe 9 at equal intervals, the water outlets of the water distribution heads 10 face downwards, and the water outlets of all the water distribution heads 10 are positioned on the same plane, so that after sewage in the water distribution pipes 9 flows out through the water distribution heads 10, not only can the uniform water distribution of the sewage on the cross section of the biochemical reaction tank 4 be realized, but also the downward water outlet can blow away sludge at the bottom of the biochemical reaction tank 4 to avoid sludge deposition, and simultaneously, the water outlets of the water distribution heads 10 are prevented from being blocked.
The number of the overflow weirs 11 is multiple, the overflow weirs 11 are uniformly arranged above the biochemical reaction tank 4, the water collecting tank 5 is also arranged above one side of the biochemical reaction tank 4, the end part of each overflow weir 11 is provided with an overflow port 12 communicated with the water collecting tank 5, and all the overflow weirs 11 are positioned at the same height. The overflow weir 11 is in a groove shape with an opening at the upper end, the tops of two sides of the groove-shaped overflow weir 11 are the sawtooth-shaped upper edges 14, and the sawtooth-shaped upper edges 14 have the advantages that sewage at the top of the biochemical reaction tank 4 can uniformly flow into each overflow weir 11, and the sewage can uniformly rise in the biochemical reaction tank 4.
After the sewage is uniformly distributed by the water distribution head 10, the sewage uniformly rises in the biochemical reaction tank 4, and in the earlier stage of sludge culture, the sludge in the biochemical reaction tank 4 is broken under the action of water flow shearing force, so that the granular sludge with good settling property is distributed in a state that flocculent sludge with poor settling property is on the upper side, and the cultured sludge has good sewage treatment capability along with the growth increase of sludge granules. In the process that the sewage rises in the biochemical reaction tank 4, firstly, aerobic reaction is carried out under the action of microorganisms in aerobic granular sludge at the bottom, organic matters and ammonia nitrogen in the sewage are removed, and the ammonia nitrogen is converted into oxide nitrogen through nitration reaction; along with the rising of the sewage and the continuous consumption of the dissolved oxygen, the sewage is in an anaerobic state when rising to the upper part of the biochemical reaction tank 4, anaerobic reaction is carried out under the action of anaerobic microorganisms in the sludge, and the oxidized nitrogen is converted into nitrogen to be removed through denitrification, so that the purification treatment of the sewage is realized.
The water collecting tank 5 is rectangular, one end of the water collecting tank 5 is provided with a water outlet pipe 7 for discharging the treated sewage, and the other end is communicated with the bottom of the aeration tank 2 through a return pipe 6. The water outlet 12 of the overflow weir 11 has a larger distance difference with the bottom of the water collecting tank 5, so that the sludge with relatively poor settling property carried in the sewage entering the water collecting tank 5 naturally settles to the bottom, the upper clear water flows out through the water outlet pipe 7, and when the sludge accumulates to a certain amount, the lower water flow carries the sludge to enter the aeration tank 2 through the return pipe 6.
The diameter of the return pipe 6 is far larger than that of the water outlet pipe 7, so that most of the sewage entering the water collecting tank 5 flows back to the aeration tank 2 through the return pipe 6, only a small part of the sewage is discharged through the water outlet pipe 7, the return flow is dozens of times of the discharge amount (equal to the water inlet amount), the sewage is discharged after being circularly treated for dozens of times in the whole treatment device, and the sewage is ensured to reach the discharge standard after being treated.
The rising flow rate of the sewage in the biochemical reaction tank 4 is determined by the aeration quantity in the aeration tank 2, and the larger the aeration quantity is, the larger the rising flow rate is, the swelling height of the sludge is determined by the rising flow rate, and further the size of the sewage backflow quantity is influenced. The biochemical reaction tank 4 is an upflow sludge bed containing a large number of different types of aerobic microorganisms and anaerobic microorganisms. The aerobic granular sludge culture stage can have larger aeration quantity, which is beneficial to the culture of the aerobic granular sludge, and when the nitrification effect of the aerobic area in the equipment is better, the aeration quantity is properly reduced, so that the upper part forms an anaerobic area. The pipe diameters of the water inlet pipe 3 and the return pipe 6 of the reaction tank are larger, such as larger than 200mm, so that the hydraulic loss in the sewage circulation process is reduced.
The water flow oxygenated by the aeration tank 2 flows upwards from the bottom and contacts aerobic granular sludge with better sedimentation performance, a large amount of aerobic microorganisms attached to the aerobic granular sludge oxidize ammonia nitrogen and partial organic matters and quickly consume dissolved oxygen in water, so that the upper layer is an anaerobic area. After the aerobic microorganisms are oxidized, a large amount of oxidized nitrogen is contained in the water, and a large amount of anaerobic microorganisms attached to the sludge on the upper layer of the biochemical reaction tank 4 denitrify the part of oxidized nitrogen into nitrogen by using residual organic matters to realize sewage denitrification. After a long period of operation, the aerobic granular sludge gradually increases in particle size, resulting in an anoxic region in the central region thereof, where microorganisms begin to convert into anaerobic microorganisms. Part of nitrate nitrogen and organic matters oxidized by external aerobic microorganisms directly enter the particles for denitrification to realize partial denitrification;
because the water yield is equal to the water inflow, the larger the aeration amount is, the smaller the pressure intensity at the bottom of the aeration tank 2 is, the larger the water flow is along with the rising of the air bubbles, the larger the reflux amount is, namely the reflux amount can be determined by the aeration amount of the aeration tank 2. The sludge with poor sedimentation performance contained in the return water is broken through a large amount of aeration, and can enter the bottom of the biochemical reaction tank 4 again and be attached to the granular sludge at the bottom, so that the formation of the granular sludge, the increase of the grain diameter of the granular sludge and the formation of an anaerobic area in grains are promoted.
The overflow pipe 13 is higher than the water outlet pipe 7, and can be used as the water outlet pipe 7 to discharge water when the water outlet pipe 7 is blocked, rainstorm weather or the water inflow is overlarge. And when the liquid level height of the equipment needs to be increased, the water outlet pipe 7 is replaced to discharge water. In the sludge culturing period of the equipment, the sludge of a common sewage plant, preferably the activated sludge of a biochemical pool, can be selectively added, so that the culturing 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 (8)
1. A separated aeration upflow sludge blanket integrated sewage treatment device comprises a water inlet pipe (1), an aeration tank (2), a biochemical reaction tank (4), a water collecting tank (5) and a water outlet pipe (7), wherein the water inlet pipe is used for introducing sewage to be treated into the aeration tank, the bottom of the aeration tank is provided with an aeration disc (8), the bottom of the biochemical reaction tank is provided with a water distribution pipe (9), and the treated sewage is discharged through the water outlet pipe; the method is characterized in that: the aeration tank is communicated with the biochemical reaction tank (4) through a reaction tank water inlet pipe (3), one end of the reaction tank water inlet pipe is communicated with the upper part of the aeration tank, the other end of the reaction tank water inlet pipe extends into the bottom of the biochemical reaction tank, a water distribution pipe is communicated with a reaction tank water inlet pipe extending into the bottom of the biochemical reaction tank, and a plurality of water distribution heads (10) with downward water outlets are uniformly arranged on the water distribution pipe; the water inlet groove is positioned above one side of the biochemical reaction tank, a plurality of horizontal overflow weirs (11) are uniformly arranged above the biochemical reaction tank, and the end parts of the overflow weirs are provided with overflow ports (12) communicated with the water collecting groove; the water collecting tank is communicated with the aeration tank through a return pipe (6), a water inlet of the return pipe is communicated with the water inlet tank, a water outlet of the return pipe is communicated with the bottom of the aeration tank, and a water outlet pipe is arranged on the water collecting tank; sludge and sludge particles are inoculated in the biochemical reaction tank;
the sewage entering through the water inlet pipe is mixed with the original sewage in the aeration tank and is aerated and oxygenated through the aeration disc, the aerated sewage expands to reduce the density and the pressure of the sewage at the bottom of the aeration tank, and the sewage in the water collecting tank flows into the bottom of the aeration tank under the action of pressure difference; aerating to raise the liquid level in the aeration tank, allowing sewage in the aeration tank to flow into the water distribution pipe through the water inlet pipe of the reaction tank under the action of liquid level difference, allowing the sewage to flow out through the water distribution head and then to be uniformly distributed at the bottom of the biochemical reaction tank, allowing the sewage to undergo aerobic reaction under the action of microorganisms in aerobic granular sludge at the bottom in the process of rising in the biochemical reaction tank to remove organic matters and ammonia nitrogen in water, and allowing the sewage to undergo anaerobic reaction under the action of microorganisms in anaerobic sludge at the upper part so as to convert oxidized nitrogen into nitrogen for removal through denitrification; the sludge at the upper end of the biochemical reaction tank flows into the water collecting tank through the overflow weir, most of the sewage entering the water collecting tank flows back to the aeration tank through the return pipe, and the rest is discharged through the water outlet pipe.
2. The integrated sewage treatment plant of the split aeration upflow sludge blanket as claimed in claim 1, which is characterized in that: the water outlets of all the water distribution heads (10) on the water distribution pipe (9) are positioned on the same horizontal plane, so that the water outlet of the water distribution heads can disperse the sludge at the bottom of the biochemical reaction tank to prevent the sludge from silting up.
3. The split aeration upflow sludge blanket integrated sewage treatment plant as claimed in claim 1 or 2, wherein: the overflow weir (11) is in a groove shape with an opening at the upper end, and the upper ends of two sides of the groove-shaped overflow weir are both provided with sawtooth-shaped upper edges (14) so that sewage on the upper part of the biochemical reaction tank uniformly flows into each overflow weir.
4. The split aeration upflow sludge blanket integrated sewage treatment plant as claimed in claim 1 or 2, wherein: the internal diameter of the return pipe (6) is 5-10 times of the internal diameter of the water outlet pipe (7), and the lowest position of the water outlet pipe is higher than the highest position of a water inlet of the return pipe.
5. The split aeration upflow sludge blanket integrated sewage treatment plant as claimed in claim 1 or 2, wherein: the overflow port (12) and the bottom of the water collecting tank (5) have a height difference, so that flocculent sludge entering the water collecting tank along with sewage and sludge with poor settling performance are settled and accumulated to a certain amount and then enter the aeration tank along with the sewage.
6. The split aeration upflow sludge blanket integrated sewage treatment plant as claimed in claim 1 or 2, wherein: the diameters of the water inlet pipe (3) and the return pipe (6) of the reaction tank are larger than 200 mm.
7. The split aeration upflow sludge blanket integrated sewage treatment plant as claimed in claim 1 or 2, wherein: an overflow pipe (13) communicated with the water collecting tank (5) is arranged above the water outlet pipe (7).
8. The treatment method of the split aeration upflow sludge blanket integrated sewage treatment equipment based on the claim 1 is characterized by comprising the following steps:
a) aerating and refluxing, wherein sewage to be treated enters an aeration tank through a water inlet pipe, aeration and oxygenation are carried out under the action of an aeration disc, the aerated sewage rises and expands to reduce the density of the sewage in the aeration tank, the sewage in a water collecting tank flows into the aeration tank through a return pipe under the action of pressure difference, and the aeration of the aeration disc promotes the automatic circulation of the sewage in the whole sewage treatment equipment;
b) granular sludge is formed and aerobically reacts, aeration is carried out to ensure that the liquid level in the aeration tank rises, under the action of liquid level difference, sewage at the upper part of the aeration tank flows into the water distribution pipe through the water inlet pipe of the reaction tank and flows out through the water distribution head, and the uniform distribution of the entering sewage at the bottom of the biochemical reaction tank is realized; sludge culture is carried out in the early stage, and in the process that sewage rises in a biochemical reaction tank, sludge is broken under the action of water flow shearing force and is distributed in a state that granular sludge with good settling property is below flocculent sludge with poor settling property; after the granular sludge is formed, the sewage entering the bottom of the biochemical reaction tank is subjected to aerobic reaction under the action of microorganisms in the granular sludge, organic matters and ammonia nitrogen in the water are removed, and the ammonia nitrogen is converted into oxidized nitrogen;
c) anaerobic reaction, wherein the upper part of the biochemical reaction tank is in an anaerobic state along with the rising of sewage and the continuous consumption of dissolved oxygen, anaerobic reaction is carried out under the action of anaerobic microorganisms in sludge, and oxidized nitrogen is converted into nitrogen to be removed through denitrification; meanwhile, along with long-time operation, the grain size of the aerobic granular sludge is gradually increased, so that the central area of the aerobic granular sludge is an anoxic area, microorganisms begin to be converted into anaerobic microorganisms in the anoxic area, and part of nitrate nitrogen and organic matters oxidized by external aerobic microorganisms directly enter the granules for denitrification to realize partial denitrification;
d) the sewage flows back and is discharged, the sewage at the upper part of the biochemical reaction tank and a certain amount of carried flocculent sludge flow into the water collecting tank through the overflow weir, most of the sewage entering the water collecting tank flows into the aeration tank through the return pipe, and a small part of the sewage is discharged through the water outlet pipe; and the sewage reflowing to the aeration tank is oxygenated and then enters the biochemical reaction tank again for purification treatment, and the sewage is circularly treated for dozens of times and then reaches the discharge standard and is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269603.3A CN112408597A (en) | 2020-11-13 | 2020-11-13 | Separate aeration upflow sludge blanket integrated sewage treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269603.3A CN112408597A (en) | 2020-11-13 | 2020-11-13 | Separate aeration upflow sludge blanket integrated sewage treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112408597A true CN112408597A (en) | 2021-02-26 |
Family
ID=74831167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011269603.3A Pending CN112408597A (en) | 2020-11-13 | 2020-11-13 | Separate aeration upflow sludge blanket integrated sewage treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112408597A (en) |
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 |
| CN115231697A (en) * | 2022-07-12 | 2022-10-25 | 清华大学 | Water and gas distribution device and method for BioTopp aerobic granular sludge biochemical reactor |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417881A (en) * | 2015-12-21 | 2016-03-23 | 山东国辰实业集团有限公司 | Self-circulating biological membrane denitrifying sewage treatment equipment |
| CN105502657A (en) * | 2016-01-05 | 2016-04-20 | 北京化工大学 | Device and method for treating high-concentration ammonia-nitrogen wastewater in aeration-anaerobic circulation mode |
| CN106277326A (en) * | 2016-09-13 | 2017-01-04 | 南京大学 | A kind of aerobic-anaerobic integration granular sludge reactor and the method processing waste water thereof |
-
2020
- 2020-11-13 CN CN202011269603.3A patent/CN112408597A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417881A (en) * | 2015-12-21 | 2016-03-23 | 山东国辰实业集团有限公司 | Self-circulating biological membrane denitrifying sewage treatment equipment |
| CN105502657A (en) * | 2016-01-05 | 2016-04-20 | 北京化工大学 | Device and method for treating high-concentration ammonia-nitrogen wastewater in aeration-anaerobic circulation mode |
| CN106277326A (en) * | 2016-09-13 | 2017-01-04 | 南京大学 | A kind of aerobic-anaerobic integration granular sludge reactor and the method processing waste water thereof |
Cited By (4)
| 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 |
| CN115231697A (en) * | 2022-07-12 | 2022-10-25 | 清华大学 | Water and gas distribution device and method for BioTopp aerobic granular sludge biochemical reactor |
| CN115231697B (en) * | 2022-07-12 | 2024-01-26 | 清华大学 | Water and gas distribution device and method for BioTopp aerobic granular sludge biochemical reactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2254842B1 (en) | Method and device for the treatment of waste water | |
| CN112408597A (en) | Separate aeration upflow sludge blanket integrated sewage treatment equipment | |
| CN101643269A (en) | Biological aerated filter and process | |
| CN205258127U (en) | Circulatory flow loop type multistage sludge -biofilm intergrowth combined type bioreactor | |
| CN108314186B (en) | Aerobic-anaerobic-aerobic three-phase efficient oxygen supplementing wetland system | |
| CN214654342U (en) | Ultramicro power integrated sewage treatment equipment | |
| CN218025595U (en) | Continuous flow aerobic granular sludge system for enhancing nitrogen and phosphorus removal | |
| CN210001741U (en) | Sewage treatment device | |
| CN115286104A (en) | Continuous flow aerobic granular sludge system and process for enhancing nitrogen and phosphorus removal | |
| CN101219831A (en) | Migration bed/activated sludge process series arrangement | |
| CN213738785U (en) | Separate aeration combined tower for treating high-concentration organic and/or nitrogen-containing wastewater | |
| CN112320953A (en) | Separate aeration self-circulation two-stage denitrification integrated sewage treatment equipment and method | |
| CN112321093A (en) | Separate aeration upflow aerobic granular sludge integrated sewage treatment equipment and method | |
| CN112408600A (en) | Separate aeration autotrophic nitrogen removal integrated sewage treatment equipment | |
| CN112125401A (en) | Slurry-water split double-sludge reaction device and reaction method | |
| CN218025787U (en) | Small-size integration MBR sewage treatment equipment suitable for it is undulant to intake | |
| CN214654338U (en) | Micro-power integrated sewage treatment equipment | |
| CN207313242U (en) | A kind of split reflux declines oxygen denitrification reactor | |
| CN213738786U (en) | Separate aeration self-circulation two-stage denitrification integrated sewage treatment equipment | |
| CN215049474U (en) | Centralized sewage treatment facility | |
| CN213680293U (en) | Integrated biological fluidized bed sewage treatment device | |
| CN213739100U (en) | Separate aeration upflow aerobic granular sludge integrated sewage treatment equipment | |
| CN212102192U (en) | Rural sewage integrated treatment equipment switched to operate in AAO or SBBR mode | |
| CN1203008C (en) | Sewage treatment bioreactor | |
| CN112320935A (en) | Independent aeration combined tower and method for treating organic wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |