CN214735210U - Land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus - Google Patents
Land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus Download PDFInfo
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Abstract
The utility model discloses a festival ground type sewage treatment system of high-efficient enrichment organic carbon and inorganic phosphorus belongs to environmental engineering technical field. The utility model comprises a biological adsorption device, a primary sedimentation tank, an aerobic granular sludge reaction device and a sulfur-iron autotrophic denitrification filter tank device, which are totally 4 functional units. The sewage is subjected to biological adsorption, organic carbon is enriched to generate high-quality excess sludge, nitrogen (N) and phosphorus (P) can be deeply removed by the aerobic granular sludge and the sulfur-iron autotrophic denitrification process, Extracellular Polymers (EPS) and phosphate of the aerobic granular sludge can be recovered, and resource recycling and greenhouse gas emission reduction are realized through integrated application. The formed process has low energy consumption, small occupied area, reduced corresponding operating cost and civil engineering cost and certain economic value.
Description
Technical Field
The utility model relates to a festival ground type sewage treatment system of high-efficient enrichment organic carbon and inorganic phosphorus belongs to environmental engineering technical field.
Background
With the improvement of the discharge standard of sewage treatment, the resources and energy sources required for treating pollutants are increased. In the running process of the sewage treatment plant in China, the energy waste problem in the running regulation and control and management process exists, and the problem of overhigh carbon emission caused by lower equipment efficiency of each treatment unit also exists. In the face of huge energy consumption and material consumption, a large amount of resources such as organic carbon and the like rich in sewage are transferred to sludge as much as possible and used for further utilization, so that the method has great sustainable potential, but the common activated sludge method cannot meet the requirement of carbon emission reduction. For phosphorus removal, although the biological method is a relatively economic phosphorus removal method, the biological phosphorus removal process cannot ensure that the effluent is stable and reaches the standard at present due to the lack of a carbon source in the inlet water of a sewage treatment plant, so that chemical phosphorus removal measures are often required to meet the requirements. Based on the large consumption of the phosphorus removal agent, a new method with high efficiency and low consumption is urgently searched for in the operation regulation of the sewage treatment plant.
In order to reduce the negative benefits of sewage treatment on the environment as much as possible, a sewage treatment process system needs to be developed and integrated, and the resource and energy are efficiently reduced and turned to be recycled by simply removing pollutants such as C, P and the like while ensuring the water quality, reducing the operation energy consumption and reducing the civil engineering cost.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a high-efficient enrichment organic carbon and inorganic phosphorus's festival ground type sewage treatment system realizes the comprehensive sustainable target of low carbon emission, resource recovery, high-efficient control and energy development on the stable discharge to reach standard of multi-target pollutant, energy and medicament consumption reduce, area reduce and nitrogen phosphorus depth control's basis.
The technical scheme of the utility model as follows: an area-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus comprises a biological adsorption device, a primary sedimentation tank, an aerobic granular sludge reaction device and a sulfur-iron autotrophic denitrification filter device which are connected in sequence, wherein,
the biological adsorption device comprises a water inlet pipe, a water distribution channel, a water inlet hole, a biological adsorption tank, a water collecting tank and a water outlet pipe which are sequentially communicated, wherein the bottom in the biological adsorption tank is provided with a residual sludge pipe, the middle lower part of the biological adsorption tank is provided with an air pipeline, the upper part of the biological adsorption tank is provided with a return sludge channel, and the air pipeline is provided with a plurality of aeration heads;
the primary sedimentation tank comprises a water inlet pipe, a water outlet pipe and a return sludge pipe, the water inlet pipe of the primary sedimentation tank is connected with the water outlet pipe of the biological adsorption device through a pump, and the return sludge pipe is positioned at the lower part of the primary sedimentation tank and is connected with the return sludge pipe of the biological adsorption device through a pump;
the aerobic granular sludge reaction device is provided with a water inlet pipe, a water inlet well, an aerobic granular sludge reaction tank, a decanter, a water outlet well and a water outlet pipe which are sequentially connected, and the water inlet pipe of the aerobic granular sludge reaction device is connected with the water outlet pipe of the primary sedimentation tank through a pump; the bottom of the aerobic granular sludge reaction tank is provided with an aeration pipe, the aeration pipe is provided with a plurality of aeration heads, and a submersible stirrer is also arranged in the aerobic granular sludge reaction tank;
the sulfur-iron autotrophic denitrification filter device comprises a water inlet pipe, a water inlet main channel, a sulfur-iron autotrophic denitrification filter and a water outlet main channel, wherein one end of the water inlet pipe is connected with a water outlet pipe of the aerobic granular sludge reaction device through a pump, the other end of the water inlet pipe is connected with a water inlet main channel of the sulfur-iron autotrophic denitrification filter device, the water inlet main channel is communicated with the sulfur-iron autotrophic denitrification filter through an overflow weir, the sulfur-iron autotrophic denitrification filter is divided into two parts which are bilaterally symmetrical, each part comprises a water inlet tank, a filter material layer, a sandstone layer and a supporting layer from top to bottom, and a filter head penetrates through the supporting layer; the sulfur-iron autotrophic denitrification filter further comprises a water drainage channel and an air water distribution channel, wherein the water drainage channel and the air water distribution channel are arranged between the two bilaterally symmetrical parts, the water drainage channel is arranged at the middle upper part of the sulfur-iron autotrophic denitrification filter, the water inlet end of the water drainage channel is lower than the highest point of the filter material layer, the air water distribution channel is arranged under the water drainage channel and is communicated with the lower parts of the bearing layers at the two sides through an air distribution hole and a water distribution hole, and a water outlet channel is arranged below the bearing layers and is connected with a water outlet main channel through an overflow weir.
In one embodiment, the return sludge channel in the biological adsorption device is positioned at the upper part of the biological adsorption tank and is used for uniformly supplementing sludge, regulating the concentration of the sludge in the biological adsorption tank, strengthening the activity of the sludge and fully playing the adsorption, coagulation, sedimentation and degradation performances.
In one embodiment, the primary sedimentation tank is preferably a radial flow type primary sedimentation tank, and further comprises a scraper plate and a mobile bridge, wherein the scraper plate is used for scraping floating residues.
In one embodiment, the primary sedimentation tank further comprises a central pipe positioned in the center, a distribution well and a water collecting well at the bottom, wherein the water inlet pipe is communicated with the central pipe and uniformly distributes sewage through the distribution well, the water collecting well is used for collecting inlet water and discharging the inlet water into the primary sedimentation tank, and the water outlet pipe is used for collecting peripheral outlet water and discharging the outlet water.
In one embodiment, the aerobic granular sludge reaction tank is filled with aerobic granular sludge, and the aerobic granular sludge reaction device repeatedly and circularly operates according to four stages of water inlet, aeration, sedimentation and water outlet, so that dissolved oxygen gradient exists in granules, and three areas of aerobic, anoxic and anaerobic are generated from the outside to the inside, thereby not only maintaining good biological diversity in the sludge, but also having better C, N, P removal effect compared with the conventional sewage treatment process. The aerobic granular sludge has good sedimentation performance, can store a large amount of biomass, can reduce the discharge of excess sludge, and simultaneously has good recovery potential for Extracellular Polymeric Substance (EPS) in the aerobic granular sludge. The front and the back of the pool are respectively provided with a water inlet well and a water outlet well for collecting, storing and balancing and adjusting sewage, the aeration head at the bottom of the pool and the submersible mixer make aeration uniform, and a decanter at the water outlet end of the pool periodically removes supernatant.
In one embodiment, the filter material layer of the sulfur-iron autotrophic denitrification filter tank is a sulfur-iron filter material and comprises sulfur and iron shavings, and the sewage is hydrolyzed into Fe by the iron shavings2+、Fe3+The method for recovering and removing phosphorus in the form of vivianite reduces the phosphorus removal medicamentAnd the addition is carried out, the pH stability of the system is maintained, the additional alkalinity is not required, and the normal operation of denitrification is ensured. The filter bed has certain filtering function by controlling the height and the grain diameter of the filter bed of the ferro-sulphur filter material.
In one embodiment, the air distribution holes on the air-water distribution channel are round holes, and the water distribution holes are square holes.
In one embodiment, the number of the water inlet grooves can be multiple and is fixed through supporting steel bars.
In one embodiment, the drainage channel is angled from horizontal and the water inlet end is higher than the water outlet end.
In one embodiment, the sulfur-iron autotrophic denitrification filter further comprises a total backwashing gas pipe and a total backwashing water pipe, which are positioned outside the backwashing gas pipe and the backwashing water pipe and communicated with the gas-water distribution channel for cleaning the filter material layer.
In one embodiment, the biological adsorption device is provided with 1 seat, air galleries are arranged on the whole lengths of two sides of the biological adsorption device and are connected with the air pipelines, aeration heads are uniformly and densely distributed at the bottom of the tank, 1 residual sludge pipe is connected with a sludge treatment system and used for discharging sludge, 1 water outlet pipe is connected to a water inlet pipe of a primary sedimentation tank, and 1 backflow sludge channel is arranged and used for collecting backflow sludge of the primary sedimentation tank and penetrates through the biological adsorption tank.
In one embodiment, the primary sedimentation tank is designed into 1 seat, radial flow type is adopted, water is fed from the middle of the primary sedimentation tank, water is discharged from the periphery of the primary sedimentation tank, and a sludge return pipe is connected to the biological adsorption tank.
In one embodiment, the aerobic granular sludge reaction device is provided with 2 seats, a water inlet well and a water outlet well are respectively arranged at the front and the rear of the device and used for collecting, storing and balancing and adjusting sewage, aeration heads are uniformly and densely distributed at the bottom of the tank, 4 submersible mixers are preferably arranged in each tank so as to ensure uniform aeration and stable water conservancy flow state, and 1 decanter is arranged at the water outlet end of the aerobic granular sludge reaction tank so as to periodically remove clarified water on the surface of the tank.
In one embodiment, the sulfur-iron autotrophic denitrification filter device is provided with 1 group, and the filter material is selected from sulfur granules (with the particle size of 2-3mm) and iron shaving filler balls, wherein the volume ratio of the sulfur granules to the iron shaving filler balls is 1: 1.
The utility model discloses an operation principle is:
effluent of a grit chamber of a water treatment plant firstly enters a water distribution channel of a biological adsorption device through a water inlet pipe and then enters the tank, and pollutants such as granular and colloidal organic matters, suspended inorganic matters, heavy metals and the like are removed through flocculation, adsorption, absorption, biodegradation and the like of extracellular polymers secreted by microorganisms in activated sludge flocs without adding any flocculating agent. The degraded and absorbed pollutants are used for carrying out the autometabolism of microorganisms on one hand so as to keep the sludge activity in the system; on the one hand, the sludge is discharged out of the system along with the excess sludge. Meanwhile, the biological adsorption tank receives return sludge from the primary sedimentation tank and uniformly returns the return sludge to the water inlet end through a return sludge channel penetrating through the center of the tank.
The primary sedimentation tank settles along with the flowing of water under the natural sedimentation effect of the water, suspended matters enter a sludge hopper along the gradient of the bottom of the tank and flow back to the biological adsorption tank through a return sludge pipe, and clarified water overflows from the periphery of the tank into a water outlet channel and is discharged through the water outlet pipe.
The aerobic granular sludge reaction device operates in a sequencing batch mode, and operates according to the four stages of water inlet, aeration, sedimentation and water outlet in a repeated and cyclic mode, so that dissolved oxygen gradient exists in granules, three areas of aerobic, anoxic and anaerobic are generated from the surface to the inside, the good biological diversity in the sludge is maintained, and the C, N, P removing effect is better than that of the conventional sewage treatment process. The aerobic granular sludge has good sedimentation performance, can store a large amount of biomass, can reduce the discharge of excess sludge, and simultaneously has good recovery potential of EPS in the aerobic granular sludge. The front and the back of the device are respectively provided with a water inlet well and a water outlet well which are used for collecting, storing and balancing and adjusting sewage, the aeration head at the bottom of the pool and the submersible mixer make aeration uniform, and the decanter at the water outlet end of the pool periodically removes clear water on the surface of the pool.
The filter material in the sulfur-iron autotrophic denitrification filter tank comprises sulfur and iron shavings, and Fe hydrolyzed by the iron shavings2+、Fe3+The method has the advantages of recovering and removing phosphorus in the form of vivianite, reducing the addition of a phosphorus removal agent, maintaining the pH stability of the system, avoiding the need of additionally adding alkalinity and ensuring denitrificationThe chemical denitrification is normally carried out. The filter bed height and the grain diameter of the ferro-sulphur composite filter material are controlled, and the ferro-sulphur composite filter material also has a certain filtering function. The back flush water pipe and the air pipe regularly clean the filter material, so that the replacement period of the filter material is prolonged.
The utility model has the advantages that: the utility model discloses can high-efficient enrichment organic carbon and inorganic phosphorus, sewage treatment system working costs is lower, and total reaction time is short, and the structure area is little, but degree of depth enrichment organic carbon and inorganic phosphorus reduce greenhouse gas's emission simultaneously, reduce throwing of chemical dephosphorization medicament and throw. In addition, by recycling extracellular polymeric substances and inorganic phosphorus of the aerobic granular sludge, the pollutants can be utilized in multiple targets, and the method has certain economic value and further promotes positive environmental benefits.
Drawings
Fig. 1 is a front view of an embodiment of the system, wherein the front view of each device is a cross-sectional view along its central axis.
Fig. 2 is a top view of an embodiment of the system of the present invention.
Fig. 3 is a top view of one embodiment of a bio-adsorption device of the system of the present invention.
FIG. 4 is a top view of an embodiment of the aerobic granular sludge reactor of the system of the present invention.
Fig. 5 is a top view of an embodiment of the sulfur-iron autotrophic denitrification filter device of the system of the present invention.
FIG. 6 is a top view of an embodiment of the sulfur-iron autotrophic denitrification filter device of the system of the present invention, taken along the lines B-B and C-C.
Detailed Description
To achieve the above objects, features and advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, the present invention will be described in detail with reference to the accompanying drawings.
Example 1
With reference to fig. 1 to 6, the present embodiment is introduced to the system and the working principle thereof.
A land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus, which comprises a biological adsorption device, a primary sedimentation tank, an aerobic granular sludge reaction device and a sulfur-iron autotrophic denitrification filter device which are connected in sequence,
wherein the content of the first and second substances,
the biological adsorption device comprises a water inlet pipe, a water distribution channel, a water inlet hole, a biological adsorption tank, a water collecting tank and a water outlet pipe which are sequentially communicated, wherein the bottom in the biological adsorption tank is provided with a residual sludge pipe, the middle lower part of the biological adsorption tank is provided with an air pipeline, the upper part of the biological adsorption tank is provided with a return sludge channel, and the air pipeline is provided with a plurality of aeration heads;
the primary sedimentation tank comprises a water inlet pipe, a water outlet pipe and a return sludge pipe, the water inlet pipe of the primary sedimentation tank is connected with the water outlet pipe of the biological adsorption device through a pump, and the return sludge pipe is positioned at the lower part of the primary sedimentation tank and is connected with the return sludge pipe of the biological adsorption device through a pump;
the aerobic granular sludge reaction device is provided with a water inlet pipe, a water inlet well, an aerobic granular sludge reaction tank, a decanter, a water outlet well and a water outlet pipe which are sequentially connected, and the water inlet pipe of the aerobic granular sludge reaction device is connected with the water outlet pipe of the primary sedimentation tank through a pump; the bottom of the aerobic granular sludge reaction tank is provided with an aeration pipe, the aeration pipe is provided with a plurality of aeration heads, and a submersible stirrer is also arranged in the aerobic granular sludge reaction tank;
the sulfur-iron autotrophic denitrification filter device comprises a water inlet pipe, a water inlet main channel, a sulfur-iron autotrophic denitrification filter and a water outlet main channel, wherein one end of the water inlet pipe is connected with a water outlet pipe of the aerobic granular sludge reaction device through a pump, the other end of the water inlet pipe is connected with a water inlet main channel of the sulfur-iron autotrophic denitrification filter device, the water inlet main channel is communicated with the sulfur-iron autotrophic denitrification filter through an overflow weir, the sulfur-iron autotrophic denitrification filter is divided into two parts which are bilaterally symmetrical, each part comprises a water inlet tank, a filter material layer, a sandstone layer and a supporting layer from top to bottom, and a filter head penetrates through the supporting layer; the sulfur-iron autotrophic denitrification filter further comprises a water drainage channel and an air water distribution channel, wherein the water drainage channel and the air water distribution channel are arranged between the two bilaterally symmetrical parts, the water drainage channel is arranged at the middle upper part of the sulfur-iron autotrophic denitrification filter, the water inlet end of the water drainage channel is lower than the highest point of the sulfur-iron packing layer, the air water distribution channel is arranged right below the water drainage channel and is communicated with the lower parts of the bearing layers at the two sides through an air distribution hole and a water distribution hole, and a water outlet channel is arranged below the bearing layers and is connected with a water outlet main channel through an overflow weir.
Furthermore, in the biological adsorption device, the return sludge channel has the functions of uniformly supplementing sludge, regulating the concentration of sludge in the biological adsorption tank, strengthening the activity of sludge and fully playing the adsorption, coagulation, sedimentation and degradation performances.
Further, the primary sedimentation tank is preferably a radial flow type primary sedimentation tank, and further comprises a scraping plate and a moving bridge, wherein the scraping plate is used for scraping floating residues.
Furthermore, the primary sedimentation tank also comprises a central pipe, a distribution well and a water collecting well, wherein the central pipe, the distribution well and the water collecting well are positioned in the center, the water inlet pipe is communicated with the central pipe, sewage is uniformly distributed and discharged into the primary sedimentation tank through the distribution well, the water collecting well is used for collecting inlet water and discharging the inlet water into the primary sedimentation tank, and the water outlet pipe is used for collecting peripheral outlet water and discharging the outlet water.
Furthermore, aerobic sludge is filled in the aerobic granular sludge reaction tank, and the aerobic granular sludge reaction device repeatedly and circularly operates according to four stages of water inlet, aeration, sedimentation and water outlet, so that dissolved oxygen gradient exists in granules, and three areas of aerobic, anoxic and anaerobic are generated from the outside to the inside, thereby not only maintaining good biological diversity in sludge, but also having better C, N, P removal effect compared with the conventional sewage treatment process. The aerobic granular sludge has good sedimentation performance, can store a large amount of biomass, can reduce the discharge of excess sludge, and simultaneously has good recovery potential of EPS in the aerobic granular sludge. The front and the back of the pool are respectively provided with a water inlet well and a water outlet well for collecting, storing and balancing and adjusting sewage, the aeration head at the bottom of the pool and the submersible mixer make aeration uniform, and a decanter at the water outlet end of the pool periodically removes supernatant.
Furthermore, the filter material layer is a sulfur-iron filter material comprising sulfur and iron shavings, and the sewage is hydrolyzed into Fe by the iron shavings2+、Fe3+The method recovers and removes phosphorus in the form of the vivianite, reduces the addition of a phosphorus removal agent, maintains the pH stability of the system, and does not need to add extra alkaliAnd the normal operation of denitrification is ensured. The filter bed has certain filtering function by controlling the height and the grain diameter of the filter bed of the ferro-sulphur filter material.
Further, the air distribution holes in the air-water distribution channel are round holes, and the water distribution holes are square holes.
Furthermore, the number of the water inlet grooves can be multiple and is fixed through supporting steel bars.
Furthermore, the drainage channel forms a certain angle with the horizontal plane, and the water inlet end is higher than the water outlet end.
Furthermore, the sulfur-iron autotrophic denitrification filter further comprises a total backwashing gas pipe and a total backwashing water pipe, which are positioned outside the backwashing gas pipe and the backwashing water pipe and communicated with the gas-water distribution channel for cleaning the packing layer.
Further, the biological adsorption device sets up 1 seat, and both sides total length all is equipped with the air corridor, links to each other with air conduit, and the bottom of the pool evenly gathers aeration head, and 1 excess sludge union coupling sludge treatment system sets up 1 outlet pipe connection to the inlet tube in the primary sedimentation pond, sets up 1 backward flow mud channel and is arranged in collecting the backward flow mud in the primary sedimentation pond and runs through biological adsorption pond.
Furthermore, the primary sedimentation tank is provided with 1 seat, radial flow is adopted, water flows into the middle and flows out from the periphery, and a sludge return pipe is connected to the biological adsorption tank. The aerobic granular sludge reaction device is provided with 2 seats, a water inlet well and a water outlet well are respectively arranged in the front and the rear of the device and used for collecting, storing and balancing and adjusting sewage, aeration heads are uniformly and densely distributed at the bottom of the tank, 4 submersible mixers are preferably arranged in each tank so as to ensure uniform aeration and stable water conservancy flow state, and 1 decanter is arranged at the water outlet end of the aerobic granular sludge reaction tank so as to regularly remove clear water on the surface of the tank. The sulfur-iron autotrophic denitrification filter device is provided with 1 group, and a filter material selects sulfur granules (with the grain diameter of 2-3mm) and iron shaving filler balls, wherein the volume ratio of the sulfur granules to the iron shaving filler balls is 1: 1.
The utility model discloses an operation principle is:
effluent of a grit chamber of a water treatment plant firstly enters a water distribution channel of a biological adsorption device through a water inlet pipe and then enters the tank, and pollutants such as granular and colloidal organic matters, suspended inorganic matters, heavy metals and the like are removed through flocculation, adsorption, absorption, biodegradation and the like of extracellular polymers secreted by microorganisms in activated sludge flocs without adding any flocculating agent. The degraded and absorbed pollutants are used for carrying out the autometabolism of microorganisms on one hand so as to keep the sludge activity in the system; on the one hand, the sludge is discharged out of the system along with the excess sludge. Meanwhile, the biological adsorption tank receives return sludge from the primary sedimentation tank and uniformly returns the return sludge to the water inlet end through a return sludge channel penetrating through the center of the tank.
The primary sedimentation tank settles along with the flowing of water through the natural sedimentation effect of the water, suspended matters enter a sludge hopper along the gradient of the bottom of the tank, and clarified water overflows from the periphery of the tank into a water outlet channel and is discharged through the water outlet pipe.
The aerobic granular sludge reaction device operates in a sequencing batch mode, and operates according to the four stages of water inlet, aeration, sedimentation and water outlet in a repeated and cyclic mode, so that dissolved oxygen gradient exists in granules, three areas of aerobic, anoxic and anaerobic are generated from the surface to the inside, the good biological diversity in the sludge is maintained, and the C, N, P removing effect is better than that of the conventional sewage treatment process. The aerobic granular sludge has good sedimentation performance, can store a large amount of biomass, can reduce the discharge of excess sludge, and simultaneously has good recovery potential of EPS in the aerobic granular sludge. The front and the back of the device are respectively provided with a water inlet well and a water outlet well which are used for collecting, storing and balancing and adjusting sewage, the aeration head at the bottom of the pool and the submersible mixer make aeration uniform, and the decanter at the water outlet end of the pool periodically removes clear water on the surface of the pool.
The filter material in the sulfur-iron autotrophic denitrification filter tank comprises sulfur and iron shavings, and Fe hydrolyzed by the iron shavings2+、Fe3+The method has the advantages that the phosphorus is recovered and removed in the form of the vivianite, the addition of a phosphorus removal agent is reduced, the pH stability of the system is maintained, the additional alkalinity is not required to be added, and the normal operation of denitrification and denitrification is ensured. The filter bed height and the grain diameter of the ferro-sulphur composite filter material are controlled, and the ferro-sulphur composite filter material also has a certain filtering function. The back flush water pipe and the air pipe regularly clean the filter material, so that the replacement period of the filter material is prolonged.
The protection scope of the present invention is not limited to the above embodiments, and any modifications, equivalent replacements, and improvements that can be made by a person skilled in the art within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus is characterized by comprising a biological adsorption device, a primary sedimentation tank, an aerobic granular sludge reaction device and a sulfur-iron autotrophic denitrification filter tank device which are sequentially connected, wherein,
the biological adsorption device comprises a water inlet pipe, a water distribution channel, a water inlet hole, a biological adsorption tank, a water collecting tank and a water outlet pipe which are sequentially communicated, wherein the bottom in the biological adsorption tank is provided with a residual sludge pipe, the middle lower part of the biological adsorption tank is provided with an air pipeline, the upper part of the biological adsorption tank is provided with a return sludge channel, and the air pipeline is provided with a plurality of aeration heads;
the primary sedimentation tank comprises a water inlet pipe, a water outlet pipe and a return sludge pipe, the water inlet pipe of the primary sedimentation tank is connected with the water outlet pipe of the biological adsorption device through a pump, and the return sludge pipe is positioned at the lower part of the primary sedimentation tank and is connected with the return sludge pipe of the biological adsorption device through a pump;
the aerobic granular sludge reaction device is provided with a water inlet pipe, a water inlet well, an aerobic granular sludge reaction tank, a decanter, a water outlet well and a water outlet pipe which are sequentially connected, and the water inlet pipe of the aerobic granular sludge reaction device is connected with the water outlet pipe of the primary sedimentation tank through a pump; the bottom of the aerobic granular sludge reaction tank is provided with an aeration pipe, the aeration pipe is provided with a plurality of aeration heads, and a submersible stirrer is also arranged in the aerobic granular sludge reaction tank;
the sulfur-iron autotrophic denitrification filter device comprises a water inlet pipe, a water inlet main channel, a sulfur-iron autotrophic denitrification filter and a water outlet main channel, wherein one end of the water inlet pipe is connected with a water outlet pipe of the aerobic granular sludge reaction device through a pump, the other end of the water inlet pipe is connected with a water inlet main channel of the sulfur-iron autotrophic denitrification filter device, the water inlet main channel is communicated with the sulfur-iron autotrophic denitrification filter through an overflow weir, the sulfur-iron autotrophic denitrification filter is divided into two parts which are bilaterally symmetrical, each part comprises a water inlet tank, a filter material layer, a sandstone layer and a supporting layer from top to bottom, and a filter head penetrates through the supporting layer; the sulfur-iron autotrophic denitrification filter further comprises a water drainage channel and an air water distribution channel, wherein the water drainage channel and the air water distribution channel are arranged between the two bilaterally symmetrical parts, the water drainage channel is arranged at the middle upper part of the sulfur-iron autotrophic denitrification filter, the water inlet end of the water drainage channel is lower than the highest point of the filter material layer, the air water distribution channel is arranged under the water drainage channel and is communicated with the lower parts of the bearing layers at the two sides through an air distribution hole and a water distribution hole, and a water outlet channel is arranged below the bearing layers and is connected with a water outlet main channel through an overflow weir.
2. The land-saving sewage treatment system for high-efficiency enrichment of organic carbon and inorganic phosphorus as claimed in claim 1, wherein the primary sedimentation tank is a radial flow type primary sedimentation tank, and further comprises a scraping plate and a moving bridge, wherein the scraping plate is used for scraping floating residues.
3. The land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus according to claim 2, wherein the primary sedimentation tank further comprises a central pipe positioned in the center, a distribution well and a water collecting well at the bottom, the water inlet pipe is communicated with the central pipe and uniformly distributes sewage through the distribution well, the water collecting well is used for collecting inlet water and discharging the inlet water into the primary sedimentation tank, and the water outlet pipe is used for collecting peripheral outlet water and discharging the outlet water.
4. The land-saving sewage treatment system for high efficiency enrichment of organic carbon and inorganic phosphorus as claimed in claim 1, wherein the aerobic granular sludge reaction tank is filled with aerobic granular sludge.
5. The land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus according to claim 1, wherein the filter material layer is a sulfur-iron filter material comprising sulfur and iron shavings.
6. The land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus according to claim 1, wherein the volume ratio of the sulfur to the iron shavings is 1: 1.
7. The land-saving sewage treatment system for high-efficiency enrichment of organic carbon and inorganic phosphorus as claimed in claim 1, wherein the air distribution holes on the air-water distribution channel are round holes, and the water distribution holes are square holes.
8. The land-saving sewage treatment system for high efficiency enrichment of organic carbon and inorganic phosphorus as claimed in claim 1, wherein the drainage channel is at an angle with the horizontal, and the water inlet end is higher than the water outlet end.
9. The land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus according to claim 1, wherein the sulfur-iron autotrophic denitrification filter further comprises a total backwashing gas pipe and a total backwashing water pipe, which are positioned outside the backwashing gas pipe and the backwashing water pipe and are communicated with the gas-water distribution channel for cleaning the filter material layer.
10. The land-saving sewage treatment system for efficiently enriching organic carbon and inorganic phosphorus according to claim 1, wherein the bio-adsorption device comprises 1, and air galleries are arranged on both sides of the bio-adsorption device in the whole length and connected with the air pipes.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115105872A (en) * | 2022-08-30 | 2022-09-27 | 北京博汇特环保科技股份有限公司 | Sludge suction and scraping machine capable of freely screening aerobic granular sludge and operation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115105872A (en) * | 2022-08-30 | 2022-09-27 | 北京博汇特环保科技股份有限公司 | Sludge suction and scraping machine capable of freely screening aerobic granular sludge and operation method thereof |
| CN115105872B (en) * | 2022-08-30 | 2022-12-13 | 北京博汇特环保科技股份有限公司 | Sludge suction and scraping machine capable of freely screening aerobic granular sludge and operation method thereof |
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