A novel bioactive carrier water treatment reactor

Abstract

The application provides a novel bioactive carrier water treatment reactor, and belongs to the technical field of water treatment. The novel bioactive carrier water treatment reactor comprises an activated sludge reaction tank, wherein blank carriers or revived carriers are added; a secondary sedimentation tank, which is communicated with a water outlet of the activated sludge reaction tank; a separation device one, which is communicated with a sludge outlet of the secondary sedimentation tank; a recovery system, which comprises a high-efficiency biological reaction tank communicated with a carrier outlet of the separation device one, a high-efficiency sedimentation tank communicated with the high-efficiency biological reaction tank, and a separation device two communicated with a sludge outlet of the high-efficiency sedimentation tank, and wherein supernatant discharged from the secondary sedimentation tank or other waste water is added into the high-efficiency biological reaction tank. The application effectively solves the problems of filter layer blockage, large water head loss, frequent backwashing, high operation cost, large land occupation, setting after secondary treatment, long biological culture period, winter treatment capacity reduction, low cost but large land occupation and unstable effect of artificial wetlands.

Description

Technical Field

[0001] This invention provides a novel bioactive carrier water treatment reactor, belonging to the field of water treatment technology. Background Technology

[0002] With economic development, the problem of water environment deterioration has become increasingly serious. Even if sewage treatment plants meet discharge standards, the accumulation of large amounts of sewage can still lead to eutrophication (such as algal blooms). Nitrogen and phosphorus are limiting nutrients for algal growth; excessive input can damage aquatic ecosystems and affect drinking water safety. To address this issue, many regions require sewage treatment plants to implement stricter discharge standards (such as the Class A standard of the "Discharge Standard of Pollutants for Urban Wastewater Treatment Plants" GB 18918-2002, or stricter requirements in local standards such as those in Beijing and the Taihu Lake Basin).

[0003] Among existing advanced wastewater treatment technologies, biological filters and denitrification filters, while offering high treatment efficiency and good effluent quality, suffer from drawbacks such as filter media clogging, significant head loss, frequent backwashing, high operating costs, large footprint, placement after secondary treatment, long biological cultivation cycles, and reduced treatment capacity in winter. Constructed wetlands, while low-cost, are also large in size and have unstable performance. During operation, suspended solids and the continuously proliferating biofilm in the water clog the filter media pores, leading to increased filtration resistance and necessitating frequent backwashing to restore functionality. This not only increases the system's energy consumption and water usage but also places high demands on operation and management. The backwashing process requires precise control of the intensity and timing of air and water flow; incomplete backwashing leads to caking, while excessive backwashing washes away the valuable biofilm, affecting treatment efficiency. Consequently... The main drawbacks are high construction and operating costs. The tanks, expensive filter media, and complex automatic control systems of the filters all contribute to high initial investment. During operation, the power consumption for backwashing and the monitoring and maintenance of the system also constitute major costs. Furthermore, both biological filters and denitrification filters have certain requirements for influent water quality, especially the suspended solids (SS) content, which cannot be too high, otherwise it will rapidly accelerate clogging. Therefore, they are usually set up after secondary treatment as advanced treatment units. In addition, due to the biological cultivation cycle requirements, biological filters and denitrification filters need to operate year-round, which is costly, given the phenomenon that urban wastewater treatment capacity is abundant in summer but ammonia nitrogen and total nitrogen are difficult to meet standards in winter. Some wastewater treatment plants also use constructed wetlands for treatment, which have lower construction and operating costs, but suffer from drawbacks such as large land area and unstable performance. Based on these considerations, this invention provides a novel biological active carrier water treatment reactor. Summary of the Invention

[0004] The technical problem solved by this invention is that existing deep wastewater treatment methods using biological filters and denitrification filters suffer from problems such as filter layer clogging, large head loss, frequent backwashing, high operating costs, large footprint, placement after secondary treatment, long biological cultivation cycle, reduced treatment capacity in winter, and although constructed wetlands are low-cost, they require a large footprint and have unstable effects.

[0005] To solve the technical problem, the present invention provides a novel bioactive carrier water treatment reactor, comprising:

[0006] An activated sludge reaction tank is used to receive and contain wastewater or activated sludge, and blank carriers or regenerated carriers are added to the activated sludge reaction tank.

[0007] The secondary sedimentation tank is connected to the outlet of the activated sludge reaction tank. The secondary sedimentation tank uses gravity sedimentation to separate the wastewater discharged from the activated sludge reaction tank into sludge and liquid. The supernatant is discharged after meeting the standards, and a portion of the sludge is pumped back to the activated sludge reaction tank after discharge.

[0008] Separation device one is connected to the sludge outlet of the secondary sedimentation tank and is used to separate the bioactive carriers in another part of the discharged sludge from the remaining sludge.

[0009] The recycling system includes a high-efficiency biological reactor connected to the carrier outlet of the separation device one, a high-efficiency sedimentation tank connected to the high-efficiency biological reactor, and a second separation device connected to the sludge outlet of the high-efficiency sedimentation tank. The high-efficiency biological reactor contains supernatant from the secondary sedimentation tank or other wastewater.

[0010] Furthermore, in the activated sludge reaction tank, specific functional bacteria in the activated sludge adsorb onto a blank carrier to form a bioactive carrier, which carries a complex of bacteria such as nitrifying bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, and anaerobic ammonia-oxidizing bacteria.

[0011] Furthermore, the bioactive carrier is a carrier with small particle size, large specific surface area, strong microbial affinity, and recyclability.

[0012] Furthermore, the high-efficiency sedimentation tank achieves sludge-liquid separation by gravity, and a large amount of sludge, mainly composed of active biological carriers, is pumped back to the high-efficiency biological reactor. A small amount of residual sludge is separated from the biological active carriers by the separation device two.

[0013] Furthermore, both separation device one and separation device two are hydrocyclones. The feed inlet of separation device one is connected to the sludge outlet of the secondary sedimentation tank. The overflow outlet of separation device one discharges the excess sludge, and the underflow outlet of separation device one discharges the bioactive carrier.

[0014] Furthermore, the feed inlet of the second separation device is connected to the sludge outlet of the high-efficiency sedimentation tank, the overflow outlet of the second separation device discharges the remaining sludge, and the underflow outlet of the second separation device is divided into two paths, one of which pumps the separated bioactive carrier back to the high-efficiency biological reactor, and the other of which discharges the separated bioactive carrier.

[0015] Furthermore, the recycling system also includes an aeration device for aerating the high-efficiency biological reactor to provide dissolved oxygen for the microorganisms.

[0016] Furthermore, the recycling system also includes a reagent addition device for adding degradation agents and phosphorus removal agents to the high-efficiency bioreactor to promote the recycling of bioactive carriers.

[0017] The beneficial effects of this invention are as follows: Using a bioactive carrier allows microorganisms to adsorb onto the blank carrier during the initial addition, thus becoming a bioactive carrier. Equipped with a recovery system, the bioactive carrier is returned to the high-efficiency sedimentation tank. No new structures are required, reducing land use and renovation costs, lowering the cost of using the bioactive carrier, and reducing operating costs. It also provides good simultaneous nitrogen and phosphorus removal, increasing wastewater treatment capacity. Furthermore, it eliminates the need for subsequent biological filters or denitrification filters, reducing renovation costs. The bioactive carrier can be produced using upstream processes of effluent or other wastewater with good biochemical properties. This effectively solves problems such as filter clogging, high head loss, frequent backwashing, high operating costs, large footprint, placement after secondary treatment, long biological cultivation cycles, decreased treatment capacity in winter, and the problem that while constructed wetlands are low-cost, they require large footprints and have unstable performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a novel bioactive carrier water treatment reactor according to the present invention.

[0019] 1. Activated sludge reactor; 2. Separation device II; 3. Secondary sedimentation tank; 4. Separation device I; 5. High-efficiency biological reactor; 6. High-efficiency sedimentation tank; 7. Aeration device; 8. Chemical dosing device. Detailed Implementation

[0020] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0021] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0022] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] The invention will be further described below with reference to the accompanying drawings.

[0024] According to the appendix Figure 1 As shown: This invention provides a novel bioactive carrier water treatment reactor, comprising: an activated sludge reaction tank 1 for receiving and containing wastewater or activated sludge, wherein a blank carrier or a reactivated carrier is added to the activated sludge reaction tank 1; in the activated sludge reaction tank 1, specific functional bacteria in the activated sludge adsorb onto the blank carrier to form a bioactive carrier; the bioactive carrier carries a complex of bacteria such as nitrifying bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, and anaerobic ammonia-oxidizing bacteria; the bioactive carrier is a carrier with small particle size, large specific surface area, strong microbial affinity, and is recyclable; and a secondary sedimentation tank 3 connected to the outlet of the activated sludge reaction tank 1; the secondary sedimentation tank 3 uses gravity sedimentation to separate the wastewater discharged from the activated sludge reaction tank 1 into sludge and liquid; the supernatant is discharged after meeting standards, and the sludge is discharged... A portion of the sludge is pumped back to the activated sludge reactor 1. Separation device 4 is connected to the sludge outlet of the secondary sedimentation tank 3 and is used to separate the bioactive carrier from the remaining sludge in the other part of the discharged sludge. The feed inlet of separation device 4 is connected to the sludge outlet of the secondary sedimentation tank 3. The overflow outlet of separation device 4 discharges the remaining sludge, and the bottom outlet of separation device 4 discharges the bioactive carrier. Specifically, wastewater is introduced into the activated sludge reactor 1, and blank carrier or reactivated carrier is added and mixed with the wastewater. Specific functional bacteria in the activated sludge adsorb onto the blank carrier to form a bioactive carrier. The sludge in the activated sludge reactor 1 is transported to the secondary sedimentation tank 3 for sludge-liquid separation. Then, the bioactive carrier and the remaining sludge are separated by separation device 4.

[0025] As per the instruction manual Figure 1The recovery system includes a high-efficiency biological reactor 5 connected to the carrier outlet of separation device 4, a high-efficiency sedimentation tank 6 connected to the high-efficiency biological reactor 5, and a second separation device 2 connected to the sludge outlet of the high-efficiency sedimentation tank 6. The high-efficiency biological reactor 5 contains supernatant discharged from the secondary sedimentation tank 3 or other wastewater. The recovery system also includes an aeration device 7 for aerating the high-efficiency biological reactor 5 and a reagent addition device 8 for adding reagents to the high-efficiency biological reactor 5. The aeration device 7 provides dissolved oxygen for the microorganisms, and the added degradation agents and phosphorus removal agents promote the recovery of the bioactive carrier. The high-efficiency sedimentation tank 6 achieves sludge-liquid separation by gravity. A portion of the sludge is pumped back to the high-efficiency biological reactor 5, while the other portion of the sludge is separated from the bioactive carrier by the second separation device 2. Separation: Both separation device 4 and separation device 2 adopt cyclone separators. The inlet of separation device 2 is connected to the sludge outlet of the high-efficiency sedimentation tank 6. The overflow outlet of separation device 2 discharges the excess sludge. The bottom outlet of separation device 2 is divided into two paths. One path pumps the separated bioactive carrier back to the high-efficiency biological reactor 5, and the other path discharges the separated bioactive carrier. Specifically, the discharged bioactive carrier is transported to the high-efficiency biological reactor 5. Degradation agents and phosphorus removal agents are added through the reagent addition device 8. The high-efficiency biological reactor 5 is aerated through the aeration device 7. The bioactive carrier carries complex bacteria such as nitrifying bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, and anaerobic ammonia-oxidizing bacteria, enabling the high-efficiency biological reactor 5 to simultaneously carry out nitrification and denitrification, thereby enhancing the simultaneous nitrogen and phosphorus removal effect.

[0026] Working principle:

[0027] In operation, wastewater is introduced into activated sludge reactor 1, and blank or reactivated carriers are added and mixed with the wastewater. Specific functional bacteria in the activated sludge adsorb onto the blank carrier to form a bioactive carrier. The sludge in activated sludge reactor 1 is then transported to secondary sedimentation tank 3, where gravity sedimentation separates the wastewater into sludge and liquid. The supernatant is discharged after meeting standards. After discharge, a portion of the sludge is pumped back to activated sludge reactor 1, and the other portion is transported to separation device 4 to separate the bioactive carrier from the remaining sludge. The discharged bioactive carrier is then transported to high-efficiency biological reactor 5, where degradation agents and phosphorus removal agents are added via reagent addition device 8. The high-efficiency biological reactor is then aerated via aeration device 7. Aeration is carried out in tank 5 to provide dissolved oxygen for microorganisms. The bioactive carrier carries a complex of bacteria, including nitrifying bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, and anaerobic ammonia-oxidizing bacteria, enabling the high-efficiency biological reactor 5 to simultaneously carry out nitrification and denitrification, thus enhancing the simultaneous nitrogen and phosphorus removal effect. Afterwards, the sludge is concentrated and settled by gravity sedimentation in high-efficiency sedimentation tank 6. After the sludge is discharged, a portion of the sludge is returned to the high-efficiency biological reactor 5 by a pump. Then, the bioactive carrier in the remaining sludge is separated from the sludge by separation device 2. One of the bottom outlets of separation device 2 returns the separated bioactive carrier to the high-efficiency biological reactor 5 by a pump, while the other outlet discharges the separated bioactive carrier.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A novel bioactive carrier water treatment reactor, characterized in that, include: An activated sludge reaction tank (1) is used to receive and contain wastewater or activated sludge, and a blank carrier or a regenerated carrier is added to the activated sludge reaction tank. The secondary sedimentation tank (3) is connected to the outlet of the activated sludge reaction tank (1). The secondary sedimentation tank (3) uses gravity sedimentation to separate the sewage discharged from the activated sludge reaction tank (1) into sludge and liquid. The supernatant is discharged in compliance with standards. After the sludge is discharged, a portion of the sludge is pumped back to the activated sludge reaction tank (1). Separation device 1 (4) is connected to the sludge outlet of the secondary sedimentation tank (3) and is used to separate the bioactive carrier in another part of the discharged sludge from the remaining sludge. The recycling system includes a high-efficiency biological reactor (5) connected to the carrier outlet of separation device one (4), a high-efficiency sedimentation tank (6) connected to the high-efficiency biological reactor (5), and a separation device two (2) connected to the sludge outlet of the high-efficiency sedimentation tank (6). The high-efficiency biological reactor (5) contains supernatant or other wastewater discharged from the secondary sedimentation tank (3).

2. The novel bioactive carrier water treatment reactor according to claim 1, characterized in that: In the activated sludge reaction tank (1), specific functional bacteria in the activated sludge adsorb onto a blank carrier to form a bioactive carrier, which carries a complex of bacteria such as nitrifying bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, and anaerobic ammonia-oxidizing bacteria.

3. The novel bioactive carrier water treatment reactor according to claim 2, characterized in that: The bioactive carrier is a carrier with small particle size, large specific surface area, strong microbial affinity, and recyclability.

4. A novel bioactive carrier water treatment reactor according to claim 1, characterized in that: The high-efficiency sedimentation tank (6) achieves sludge-liquid separation by gravity. A portion of the sludge is pumped back to the high-efficiency biological reactor (5), while the other portion of the sludge is separated from the remaining sludge by the separation device (2).

5. A novel bioactive carrier water treatment reactor according to claim 1, characterized in that: Both the first separation device (4) and the second separation device (2) are hydrocyclones. The feed inlet of the first separation device (4) is connected to the sludge outlet of the secondary sedimentation tank (3). The overflow outlet of the first separation device (4) discharges the remaining sludge, and the bottom outlet of the first separation device (4) discharges the bioactive carrier.

6. A novel bioactive carrier water treatment reactor according to claim 5, characterized in that: The feed inlet of the second separation device (2) is connected to the sludge outlet of the high-efficiency sedimentation tank (6). The overflow outlet of the second separation device (2) discharges the remaining sludge. The bottom outlet of the second separation device (2) is divided into two paths. One path pumps the separated bioactive carrier back to the high-efficiency biological reactor (5), and the other path discharges the separated bioactive carrier.

7. A novel bioactive carrier water treatment reactor according to claim 1, characterized in that: The recycling system also includes an aeration device (7) for aerating the high-efficiency biological reactor (5).

8. A novel bioactive carrier water treatment reactor according to claim 1, characterized in that: The recycling system also includes a reagent addition device (8) for adding degradation agents and phosphorus removal agents to the high-efficiency biological reactor (5).

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