ABS sewage treatment system and its treatment process

Abstract

The invention relates to the technical field of sewage treatment, and provides an ABS sewage treatment system and a treatment process thereof, wherein the output end of the ABS sewage regulating homogenizing tank is connected to the input end of a coagulation sedimentation device, the output end of the coagulation sedimentation device is connected to the input end of a dissolved air flotation device, the output end of the dissolved air flotation device is connected to the input end of an ABS biochemical pool, the output end of the sewage regulating homogenizing pool of the Xinhecheng device is connected to the input end of a pre-reaction biochemical pool, the output end of the pre-reaction biochemical pool is connected to the input end of the coagulation sedimentation device, the output end of the ABS biochemical pool is connected to the input end of a frozen crystallization sewage regulating homogenizing tank, the output end of the frozen crystallization sewage regulating homogenizing tank is connected to the input end of a high-salt water biochemical reactor, the output end of the high-salt water biochemical reactor is connected to the input end of a high-salt sewage treatment system, and the invention can be used for sewage treatment in the case where an ABS sewage unit and high-phosphorus sewage are discharged in parallel.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an ABS sewage treatment system and a treatment process thereof. Background Art

[0002] Wastewater treatment refers to the process of removing or transforming harmful substances in wastewater through a series of physical, chemical and biological methods to make it meet the discharge standard or reuse standard. The treatment of phosphorus-containing wastewater is an important part of environmental protection and water resource management. Phosphorus is one of the main factors of eutrophication of water bodies. Excessive phosphorus can cause the ecological balance of water bodies to be disturbed, causing excessive reproduction of algae, and then causing water quality deterioration.

[0003] As disclosed in application number: CN201710447224.0, a small-scale phosphorus-containing sewage treatment device includes a sedimentation column, a reaction tank and a secondary sedimentation tank. The top of the reaction tank is connected to the bottom of the sedimentation column, and the top of the sedimentation column is connected to the secondary sedimentation tank through a conveying pipe. The conveying pipe is provided with a vacuum pump. The secondary sedimentation tank is connected to the side wall of the reaction tank through a reflux pipe. A stirring device is provided at the bottom of the reaction tank, and a water inlet is provided on the side wall. The stirring device is driven by a motor; a filtering device for blocking floating sewage precipitation is provided in the sedimentation column.

[0004] As disclosed in application number: CN202323285730.4, a high-salt sewage treatment system includes: an adjusting homogenizing tank, a high-density sedimentation tank, an ozone contact oxidation tank, a multi-stage biological aeration filter, a high-efficiency biological reaction tank, a filter cloth filter and a monitoring water pool, the water inlet of the adjusting homogenizing tank is connected to the drainage pipe of the high-salt industrial sewage, the water outlet of the adjusting homogenizing tank is connected to the water inlet of the high-density sedimentation tank, the water outlet of the high-density sedimentation tank is connected to the water inlet of the ozone contact oxidation tank, the water outlet of the ozone contact oxidation tank is connected to the water inlet of the multi-stage biological aeration filter, the water outlet of the multi-stage biological aeration filter is connected to the water inlet of the high-efficiency biological reaction tank, the water outlet of the high-efficiency biological reaction tank is connected to the water inlet of the filter cloth filter, the water outlet of the filter cloth filter is connected to the water inlet of the monitoring water pool, and the monitoring water pool is discharged through the water outlet.

[0005] However, the existing sewage treatment system has poor treatment effect and efficiency for ABS sewage and sewage containing phosphorus (orthophosphorus) and COD, insufficient treatment capacity for difficult-to-degrade substances, and high total phosphorus emissions. There is an urgent need for a sewage treatment system to treat the above sewage. Summary of the invention

[0006] In order to solve the above problems, the present invention provides an ABS sewage treatment system and a treatment process thereof to solve the problems.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The ABS sewage treatment system comprises: an ABS sewage regulating homogenizing tank, a coagulation sedimentation device, a dissolved air flotation device, an ABS biochemical pool, a sewage regulating homogenizing tank of a Xinhecheng device, a pre-reaction biochemical pool, a frozen crystallization sewage regulating homogenizing tank, a high-salt water biochemical reactor and a high-salt sewage treatment system, wherein the output end of the ABS sewage regulating homogenizing tank is connected to the input end of the coagulation sedimentation device, the output end of the coagulation sedimentation device is connected to the input end of the dissolved air flotation device, the output end of the dissolved air flotation device is connected to the input end of the ABS biochemical pool, the output end of the sewage regulating homogenizing tank of the Xinhecheng device is connected to the input end of the pre-reaction biochemical pool, the output end of the pre-reaction biochemical pool is connected to the input end of the coagulation sedimentation device, the output end of the ABS biochemical pool is connected to the input end of the frozen crystallization sewage regulating homogenizing tank, the output end of the frozen crystallization sewage regulating homogenizing tank is connected to the input end of the high-salt water biochemical reactor, and the output end of the high-salt water biochemical reactor is connected to the input end of the high-salt water treatment system.

[0009] Preferably, it also includes: a sludge slag storage tank, which is connected to the solid waste treatment facility through a sludge slag lifting pump, and the input end of the sludge slag storage tank is respectively connected to the ABS sewage regulating homogenization tank, the coagulation sedimentation device, the dissolved air flotation device, the ABS biochemical tank and the pre-reaction biochemical tank.

[0010] Preferably, it also includes: an accident water tank, the output end of the accident water tank is connected to the ABS sewage regulating homogenization tank and the frozen crystallized sewage regulating homogenization tank, and the input end of the accident water tank is connected to the ABS biochemical pool and the output end of the high-salt water biochemical reaction.

[0011] Preferably, the ABS biochemical pool comprises: an anoxic zone, a hypoxic aeration zone, a gas stripping zone, a sedimentation zone and a lifting tank, the output end of the anoxic zone is connected to the input end of the hypoxic aeration zone, the output end of the hypoxic aeration zone is connected to the input end of the gas stripping zone, the output end of the gas stripping zone is connected to the input end of the sedimentation zone, the output end of the sedimentation zone is connected to the input end of the lifting tank, and the output end of the lifting tank is connected to the frozen crystallization sewage regulating homogenization tank.

[0012] Preferably, the dissolved air flotation device is a partial reflux pressurized dissolved air flotation device.

[0013] Preferably, the ABS biochemical pool adopts a modified A / O biochemical process.

[0014] Preferably, it also includes: an auxiliary heating boiler, an ABS sewage regulating homogenization tank, a Xinhecheng device sewage regulating homogenization tank, a dissolved air flotation device, a coagulation sedimentation device, a sludge slag storage tank, a pre-reaction biochemical tank, an ABS biochemical tank, and a high-salt water biochemical reactor. The waste gas generated is collected and dehydrated through pipelines and then transported to the auxiliary heating boiler by an exhaust gas induced draft fan.

[0015] Preferably, the pre-reaction biochemical pool, the ABS biochemical pool, and the high-salt biochemical reactor are respectively provided with an aeration fan.

[0016] Preferably, the treatment process comprises the following steps:

[0017] S1: The sewage discharged by the ABS device is transported to the ABS sewage regulating and homogenizing tank through the system pressure flow pipeline. The regulating tank is equipped with two tank wall agitators to mix the sewage to prevent the coagulants from generating suspended matter and settling;

[0018] S2: The sewage from the Xinhecheng device is transported to the sewage regulating and homogenizing tank of the Xinhecheng device through the system pressure flow pipeline. The total regulating and homogenizing time is 24 hours. There are two mixing agitators in the tank to mix and homogenize the sewage and prevent sedimentation.

[0019] S3: The effluent from the sewage regulating homogenization tank of the Xinhecheng unit is pressurized and transported to the pre-reaction biochemical tank by a lifting pump. The mixed liquid in the biochemical tank inlet area and the large proportion of reflux are quickly mixed and evenly circulated into the tank for treatment;

[0020] S4: The mixed liquid return rate can be adjusted by adjusting the air volume of the air flow generator to adjust the return ratio. By controlling the sludge concentration, a higher volume load is maintained to reduce the floor space and improve the impact resistance. The liftable microporous aeration hose in the low oxygen aeration zone has an online replacement function. The mud-water mixture enters the inclined plate sedimentation tank from the low oxygen aeration zone. After the mud and water are separated, the activated sludge is returned to the front water inlet area of ​​the biochemical tank to mix with the inlet water. The clean water is collected by the water collection tank at the top of the sedimentation tank. After the water quality reaches the designed water outlet index, it is pumped to the coagulation sedimentation device to remove the total phosphorus in the sewage.

[0021] S5: The effluent from the coagulation and sedimentation device is mixed with the ABS sewage and evenly distributed to the subsequent two sets of flotation devices;

[0022] S6: The wastewater after flotation treatment flows into the ABS biochemical pool by gravity, and the acid-base neutralization wastewater pump also sends the wastewater to the pool. The incoming water is first mixed evenly by the mixing agitator set in the mixing area before entering the biochemical pool;

[0023] S7: The mixed liquid (wastewater treated in the pool) in the biochemical pool inlet area and the large proportion of the return flow is quickly mixed and evenly circulated into the pool for treatment; the return flow rate of the mixed liquid can be adjusted by adjusting the air volume of the air flow pusher to adjust the return ratio. When the inlet water concentration is high, the effluent dissolved oxygen (DO) online analyzer and the corresponding aeration blower are interlocked to increase the air supply and return volume, increase the air volume of the flow pusher, and automatically increase the return ratio; otherwise, it will be reduced;

[0024] S8: At the same time, the dissolved oxygen in the aeration tank is kept at a low and stable level in real time through a precise dissolved oxygen control system, achieving simultaneous nitrification and denitrification while saving energy and reducing consumption;

[0025] S9: By controlling the sludge concentration, maintaining the volume load and reducing the floor space, improving the impact resistance, and using microorganisms to complete the efficient degradation of pollutants such as COD, ammonia nitrogen, and total nitrogen;

[0026] S10: The liftable microporous aeration hose in the low oxygen aeration zone has an online replacement function. The mud-water mixture enters the high-efficiency inclined plate sedimentation tank from the low oxygen aeration zone. After mud-water separation, the activated sludge flows back to the front inlet area of ​​the biochemical tank to mix with the inlet water. The clean water is collected by the sump at the top of the sedimentation tank. After the water quality reaches the designed effluent index, it is pumped to the high-salt biochemical reactor for further treatment together with other sewage. If it does not meet the standard, it will be sent to the accident water tank for temporary storage.

[0027] The advantages of the present invention are as follows: through multiple treatment stages (such as regulating homogenization, coagulation and sedimentation, flotation, biochemical treatment, etc.), different pollutants in sewage can be gradually removed, and treatment efficiency and effect can be improved; devices such as ABS sewage regulating homogenization tank can pre-treat specific pollutants such as ABS, which helps subsequent units to more effectively remove these difficult-to-degrade substances; the coagulation and sedimentation device can remove suspended matter and total phosphorus in sewage, ensure that the total phosphorus discharged from the built high-salt water treatment series is stably up to standard, and reduce the burden of subsequent treatment units; the dissolved air flotation device can effectively remove grease, colloid and suspended solids, and further improve water quality; the ABS biochemical pool and the pre-reaction biochemical pool can effectively decompose organic pollutants through biodegradation, reduce chemical oxygen demand (COD) and biochemical oxygen demand (BOD); the high-salt water biochemical reactor and the high-salt sewage treatment system can treat wastewater with a high salt content. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 is a flow chart of the present invention;

[0030] Figure 2 It is a flow chart of the oil sludge scum treatment principle of the present invention;

[0031] Figure 3 It is a flow chart of the sludge treatment principle of the present invention. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0035] Embodiment 1, combined with Figure 1 , Figure 2 and Figure 3 To explain:

[0036] The ABS sewage treatment system comprises: an ABS sewage regulating homogenizing tank, a coagulation sedimentation device, a dissolved air flotation device, an ABS biochemical pool, a sewage regulating homogenizing tank of a Xinhecheng device, a pre-reaction biochemical pool, a frozen crystallization sewage regulating homogenizing tank, a high-salt water biochemical reactor and a high-salt sewage treatment system, wherein the output end of the ABS sewage regulating homogenizing tank is connected to the input end of the coagulation sedimentation device, the output end of the coagulation sedimentation device is connected to the input end of the dissolved air flotation device, the output end of the dissolved air flotation device is connected to the input end of the ABS biochemical pool, the output end of the sewage regulating homogenizing tank of the Xinhecheng device is connected to the input end of the pre-reaction biochemical pool, the output end of the pre-reaction biochemical pool is connected to the input end of the coagulation sedimentation device, the output end of the ABS biochemical pool is connected to the input end of the frozen crystallization sewage regulating homogenizing tank, the output end of the frozen crystallization sewage regulating homogenizing tank is connected to the input end of the high-salt water biochemical reactor, and the output end of the high-salt water biochemical reactor is connected to the input end of the high-salt water treatment system.

[0037] The gas volume in the anoxic zone of the ABS biochemical pool is calculated as 30% of the water inlet volume.

[0038] The gas volume in the aeration zone of the pre-reaction biochemical pool and the ABS biochemical pool is 1.2 times the aeration air volume.

[0039] ABS sewage conditioning homogenization tank and frozen crystallization sewage conditioning homogenization tank have the following functions:

[0040] Regulate sudden excessive quality and quantity of sewage and large amounts of high-concentration sewage discharged during equipment overhaul. If these sewage directly enter the biochemical treatment system, they will have an impact on the system, inhibit the growth and reproduction of microorganisms, and lead to reduced biochemical treatment effects; it has a balancing effect on the periodically changing sewage quality, making the water quantity and quality of subsequent treatment facilities more uniform, ensuring the smooth operation of the system.

[0041] Among them, the high-salt sewage treatment system has been disclosed in the document with application number: CN202323285730.4.

[0042] It also includes: a sludge slag storage tank, which is connected to the solid waste treatment facility through a sludge slag lifting pump, and the input end of the sludge slag storage tank is respectively connected to the ABS sewage regulating homogenization tank, the coagulation sedimentation device, the dissolved air flotation device, the ABS biochemical tank and the pre-reaction biochemical tank.

[0043] The bottom sludge of the ABS sewage regulating and homogenizing tank, the scum and sludge produced by the frozen crystallized sewage regulating and homogenizing tank, the accident water tank, the coagulation and sedimentation device, the dissolved air flotation, and the sludge produced by the pre-reaction biochemical tank and the ABS biochemical tank are all discharged into the sludge slag pool, and then pumped by the mud pump to the sludge concentration tank of the solid waste treatment facility unit, and then dehydrated by the centrifuge and entered into the hazardous waste incinerator for incineration treatment.

[0044] The sludge at the bottom of the high-salt water biochemical reactor is discharged to the residual sludge concentration tank of the solid waste treatment facility unit through a sludge pump installed outside the tank, and the centrifuge is used for dehydration and drying. At the same time, a switching valve is set to send the sludge to the oil sludge concentration tank of the solid waste treatment facility.

[0045] 8 solid waste treatment facilities with a total area of ​​100m 3 The sludge concentration tank gravity concentrates the sludge from the freezing crystallization device and the sewage treatment plant. After concentration, the sludge has a moisture content of about 97%~98% and is lifted to the centrifugal dehydrator by the sludge feed pump. The centrifugal dehydrator centrifuges and dehydrates the concentrated oil sludge scum, residual sludge, chemical sludge and frozen crystallization sludge. There is one oil sludge scum centrifugal dehydrator with a processing capacity of Q=5~12m 3 / h; Residual sludge and chemical sludge share a mixed centrifugal dewatering machine, Q = 5 ~ 12m 3 / h; Two frozen crystallized sludge centrifugal dehydrators, Q=5~12m 3 / h, one for use and one for standby. The moisture content of the sludge after dehydration is 80%~85%. It is pumped to the horizontal thin-layer dryer through a delivery pump, with a processing capacity of 1t / h.

[0046] There are 4 60m3 wastewater treatment plants in total. 3 The waste liquid tank is for storage, and the oil sludge slag storage is 300m 3 The crusher processing capacity of the SMP feeding system is ≥10t / h (nitrogen sealed), the effective volume of the mixer is about 10m³, the hydraulically driven plunger pump has a conveying capacity of 2t / h, and the incineration system has a processing capacity of 50t / d.

[0047] It also includes: an accident water tank, the output end of which is connected to the ABS sewage regulating homogenization tank and the frozen crystallized sewage regulating homogenization tank, and the input end of the accident water tank is connected to the ABS biochemical pool and the output end of the high-salt water biochemical reaction.

[0048] The ABS biochemical pool comprises: an anoxic zone, a low oxygen aeration zone, a gas stripping zone, a sedimentation zone and a lifting pool, wherein the output end of the anoxic zone is connected to the input end of the low oxygen aeration zone, the output end of the low oxygen aeration zone is connected to the input end of the gas stripping zone, the output end of the gas stripping zone is connected to the input end of the sedimentation zone, the output end of the sedimentation zone is connected to the input end of the lifting pool, and the output end of the lifting pool is connected to a frozen crystallized sewage regulating homogenizing tank.

[0049] The dissolved air flotation device adopts a partial reflux pressurized dissolved air flotation device.

[0050] The partial reflux pressurized dissolved air flotation device is to release a large number of fine bubbles in the flotation tank after the reflux sewage is dissolved in the dissolved air tank, so that the floccules float on the surface and form a scum layer. The scum is scraped by the scraper to the scum tank and then discharged to the oil sludge scum tank. Its performance characteristics: 1. It adopts the external reflux form, the system is large, occupies a lot of space, and requires a reflux pump; 2. It is equipped with a dissolved air tank and a dissolved air pump, the dissolved air quality is good, and the floor space is large; it is equipped with a releaser, the released bubbles are small, the removal effect is good, but it is easy to clog; the reaction flotation time is long, which can ensure the removal effect and has good stability; the water discharge effect is good, but the operation energy consumption is large and the operation is complicated.

[0051] Since the wastewater from the ABS device has undergone two-stage flotation pretreatment in the device, the suspended solids in the effluent SS ≤ 100 mg / L. At the same time, considering that the ABS wastewater has self-coagulation, more colloidal suspended matter may still be produced during the transportation from the device to the sewage field. Combined with the process used in the device and the water inlet requirements of the subsequent treatment process, this device adopts high-efficiency partial pressurized reflux dissolved air flotation as pretreatment, so that the treated effluent can meet the biochemical water inlet requirements to the maximum extent, and does not affect the efficient operation of the biochemical reaction tank, aeration facilities, etc.

[0052] The ABS biochemical pool adopts the improved A / O biochemical process. The improved A / O process combines the secondary sedimentation tank with the nitrification and denitrification tank. A single tank can complete the entire activated sludge treatment process, and there are no moving parts such as scrapers inside. The process combines microbial technology, aeration technology, air lifting technology, large-ratio reflux dilution technology and rapid clarification technology. Compared with the structure of the traditional biological nitrification and denitrification tank, the number of tanks is reduced from 3 to 1 in conventional biochemical treatment. The process is a biochemical system that combines an anoxic tank (A), an aerobic tank (O) and a sedimentation tank. The sewage flows through the A tank, and the total nitrogen in the sewage is removed by denitrifying bacteria. The nitrogen element is discharged from the water body in the form of N2 and enters the atmosphere. In the O tank, the ammonia nitrogen in the sewage is nitrified into nitrate nitrogen, and COD is oxidized into CO2 and H2O through the joint action of nitrifying bacteria and other microorganisms. The nitrified sewage is gas-lifted and returned to the A tank for denitrification and denitrification. The sewage after biochemical treatment enters the sedimentation area for clarification, and the mud and water are separated in the sedimentation area. At the same time, in the first half of the aerobic tank, the dissolved oxygen is consumed by microorganisms to degrade organic matter, and the dissolved oxygen concentration is basically at 0-0.05 mg / L. In the second half of the aeration tank, the load is reduced, and the dissolved oxygen begins to be surplus, and the dissolved oxygen is about 0.5 mg / L. Such dissolved oxygen concentration conditions provide an optimal environment for nitrification and denitrification to proceed simultaneously.

[0053] The improved A / O pool has the following characteristics: 1. High-efficiency microbial technology, under special control conditions (high sludge concentration, low dissolved oxygen, large reflux), maximizes the number of domesticated and cultured microorganisms in the biological treatment pool, specializes the bacterial flora, and makes degradation efficient, thereby effectively degrading organic pollutants and ammonia nitrogen in the water; 2. Integrated structure, which concentrates units with different treatment functions such as anoxic, aerobic, and mud-water separation in the same reaction pool. A single pool can complete the entire activated sludge treatment process, and there are no moving parts such as scrapers inside. It saves floor space, civil engineering investment, and pipeline equipment investment, providing favorable conditions for achieving high-ratio internal circulation under low energy consumption; 3. The special clarification system is designed with two major functions. One is the traditional mud-water separation function to ensure clear effluent; the other is to keep the biomass of the aeration tank stable through continuous circulation of sludge at the bottom of the clarification area; 4. The ingenious hydraulic circulation technology uses air as the driving force for lifting and uses less energy to control the internal circulation of dozens of times of mixed liquid in the biochemical pool through ingenious pool structure design. The mud-water mixture in the pool (treated sewage) is circulated in large proportion to dilute the incoming water, reducing the impact load and toxicity of the incoming water, creating a stable growth environment for microorganisms; evenly distributes the pollution load in the system, reduces the load gradient between the inlet and outlet ends of the pool, and stabilizes the dissolved oxygen control.

[0054] It also includes: auxiliary heating boiler, ABS sewage regulating homogenization tank, Xinhecheng unit sewage regulating homogenization tank, dissolved air flotation device, coagulation sedimentation device, sludge slag storage tank, pre-reaction biochemical tank, ABS biochemical tank, and high-salt water biochemical reactor. The waste gas generated is collected and dehydrated through pipelines, and then transported to the auxiliary heating boiler by the waste gas induced draft fan.

[0055] The pre-reaction biochemical pool, the ABS biochemical pool and the high-salt biochemical reactor are respectively provided with aeration fans.

[0056] The working principle of the present invention is as follows: S1: The sewage discharged by the ABS device is transported to the ABS sewage regulating and homogenizing tank through the system pressure flow pipeline. Two tank wall agitators are arranged in the regulating tank to stir and mix the sewage to prevent the coagulants from generating suspended matter and settling;

[0057] S2: The sewage from the Xinhecheng device is transported to the sewage regulating and homogenizing tank of the Xinhecheng device through the system pressure flow pipeline. The total regulating and homogenizing time is 24 hours. There are two mixing agitators in the tank to mix and homogenize the sewage and prevent sedimentation.

[0058] S3: The effluent from the sewage regulating homogenization tank of the Xinhecheng unit is pressurized and transported to the pre-reaction biochemical tank by a lifting pump. The mixed liquid in the biochemical tank inlet area and the large proportion of reflux are quickly mixed and evenly circulated into the tank for treatment;

[0059] S4: The mixed liquid return rate can be adjusted by adjusting the air volume of the air flow generator to adjust the return ratio. By controlling the sludge concentration, a higher volume load is maintained to reduce the floor space and improve the impact resistance. The liftable microporous aeration hose in the low oxygen aeration zone has an online replacement function. The mud-water mixture enters the inclined plate sedimentation tank from the low oxygen aeration zone. After the mud and water are separated, the activated sludge is returned to the front water inlet area of ​​the biochemical tank to mix with the inlet water. The clean water is collected by the water collection tank at the top of the sedimentation tank. After the water quality reaches the designed water outlet index, it is pumped to the coagulation sedimentation device to remove the total phosphorus in the sewage.

[0060] S5: The effluent from the coagulation and sedimentation device is mixed with the ABS sewage and evenly distributed to the subsequent two sets of flotation devices;

[0061] S6: The wastewater after flotation treatment flows into the ABS biochemical pool by gravity, and the acid-base neutralization wastewater pump also sends the wastewater to the pool. The incoming water is first mixed evenly by the mixing agitator set in the mixing area before entering the biochemical pool;

[0062] S7: The mixed liquid (wastewater treated in the pool) in the biochemical pool inlet area and the large proportion of the return flow is quickly mixed and evenly circulated into the pool for treatment; the return flow rate of the mixed liquid can be adjusted by adjusting the air volume of the air flow pusher to adjust the return ratio. When the inlet water concentration is high, the effluent dissolved oxygen (DO) online analyzer and the corresponding aeration blower are interlocked to increase the air supply and return volume, increase the air volume of the flow pusher, and automatically increase the return ratio; otherwise, it will be reduced;

[0063] S8: At the same time, the dissolved oxygen in the aeration tank is kept at a low and stable level in real time through a precise dissolved oxygen control system, achieving simultaneous nitrification and denitrification while saving energy and reducing consumption;

[0064] S9: By controlling the sludge concentration, maintaining the volume load and reducing the floor space, improving the impact resistance, and using microorganisms to complete the efficient degradation of pollutants such as COD, ammonia nitrogen, and total nitrogen;

[0065] S10: The liftable microporous aeration hose in the low oxygen aeration zone has an online replacement function. The mud-water mixture enters the high-efficiency inclined plate sedimentation tank from the low oxygen aeration zone. After mud-water separation, the activated sludge flows back to the front inlet area of ​​the biochemical tank to mix with the inlet water. The clean water is collected by the sump at the top of the sedimentation tank. After the water quality reaches the designed effluent index, it is pumped to the high-salt biochemical reactor for further treatment together with other sewage. If it does not meet the standard, it will be sent to the accident water tank for temporary storage.

[0066] For those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim involved.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any slight modification, equivalent substitution and improvement made to the above embodiment based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. ABS sewage treatment system, characterized by: include: An ABS sewage regulating homogenizing tank, a coagulation and sedimentation device, a dissolved air flotation device, an ABS biochemical pool, a sewage regulating homogenizing tank of a Xinhecheng device, a pre-reaction biochemical pool, a frozen crystallization sewage regulating homogenizing tank, a high-salt water biochemical reactor and a high-salt sewage treatment system, wherein the output end of the ABS sewage regulating homogenizing tank is connected to the input end of the coagulation and sedimentation device, the output end of the coagulation and sedimentation device is connected to the input end of the dissolved air flotation device, the output end of the dissolved air flotation device is connected to the input end of the ABS biochemical pool, the output end of the sewage regulating homogenizing tank of the Xinhecheng device is connected to the input end of the pre-reaction biochemical pool, the output end of the pre-reaction biochemical pool is connected to the input end of the coagulation and sedimentation device, the output end of the ABS biochemical pool is connected to the input end of the frozen crystallization sewage regulating homogenizing tank, the output end of the frozen crystallization sewage regulating homogenizing tank is connected to the input end of the high-salt water biochemical reactor, and the output end of the high-salt water biochemical reactor is connected to the input end of the high-salt water treatment system; It also includes: a sludge scum storage tank, which is connected to the solid waste treatment facility through a sludge scum lifting pump, and the input end of the sludge scum storage tank is respectively connected to the ABS sewage regulating homogenization tank, the coagulation sedimentation device, the dissolved air flotation device, the ABS biochemical tank and the pre-reaction biochemical tank; the ABS biochemical tank includes: an anoxic zone, a low oxygen aeration zone, an air stripping zone, a sedimentation zone and a lifting tank, the output end of the anoxic zone is connected to the input end of the low oxygen aeration zone, and the output end of the low oxygen aeration zone is connected to the input end of the air stripping zone The output end of the gas lift zone is connected to the input end of the sedimentation zone, the output end of the sedimentation zone is connected to the input end of the lifting tank, and the output end of the lifting tank is connected to the frozen crystallization sewage regulating homogenization tank; it also includes: an auxiliary heating boiler, an ABS sewage regulating homogenization tank, a Xinhecheng device sewage regulating homogenization tank, a dissolved air flotation device, a coagulation sedimentation device, a sludge slag storage tank, a pre-reaction biochemical tank, an ABS biochemical tank, and the waste gas generated by the high-salt water biochemical reactor is collected and dehydrated through pipelines, and then transported to the auxiliary heating boiler by the waste gas induced draft fan.

2. The ABS sewage treatment system according to claim 1, characterized in that: Also includes: An accident water tank, the output end of which is connected to an ABS sewage regulating homogenization tank and a frozen crystallized sewage regulating homogenization tank, and the input end of which is connected to an ABS biochemical pool and an output end of a high-salt water biochemical reaction.

3. The ABS sewage treatment system according to claim 1, characterized in that: The dissolved air flotation device adopts a partial reflux pressurized dissolved air flotation device.

4. The ABS sewage treatment system according to claim 1, characterized in that: The ABS biochemical pool adopts a modified A / O biochemical process.

5. The ABS sewage treatment system according to claim 1, characterized in that: The pre-reaction biochemical pool, the ABS biochemical pool and the high-salt biochemical reactor are respectively provided with aeration fans.

6. The treatment process of the ABS sewage treatment system according to any one of claims 1 to 5, characterized in that: The treatment process includes the following steps: S1: The sewage discharged by the ABS device is transported to the ABS sewage regulating homogenization tank through the system pressure flow pipeline. The regulating tank is equipped with two tank wall agitators to mix the sewage to avoid the sedimentation of suspended matter caused by coagulants; S2: The sewage from the Xinhecheng device is transported to the sewage regulating and homogenizing tank of the Xinhecheng device through the system pressure flow pipeline. The total regulating and homogenizing time is 24 hours. There are two mixing agitators in the tank to mix and homogenize the sewage and prevent sedimentation. S3: The effluent from the sewage regulating homogenization tank of the Xinhecheng unit is pressurized and transported to the pre-reaction biochemical tank by a lifting pump. The mixed liquid in the biochemical tank inlet area and the large proportion of reflux are quickly mixed and evenly circulated into the tank for treatment; S4: The mixed liquid return rate can be adjusted by adjusting the air volume of the air flow generator to adjust the return ratio. By controlling the sludge concentration, a higher volume load is maintained to reduce the floor space and improve the impact resistance. The liftable microporous aeration hose in the low oxygen aeration zone has an online replacement function. The mud-water mixture enters the inclined plate sedimentation tank from the low oxygen aeration zone. After the mud and water are separated, the activated sludge is returned to the front water inlet area of ​​the biochemical tank to mix with the inlet water. The clean water is collected by the water collection tank at the top of the sedimentation tank. After the water quality reaches the designed water outlet index, it is pumped to the coagulation sedimentation device to remove the total phosphorus in the sewage. S5: The effluent from the coagulation and sedimentation device is mixed with the ABS sewage and evenly distributed to the subsequent two sets of flotation devices; S6: The wastewater after flotation treatment flows into the ABS biochemical pool by gravity, and the acid-base neutralization wastewater pump also sends the wastewater to the pool. The incoming water is first mixed evenly by the mixing agitator set in the mixing area before entering the biochemical pool; S7: The influent of the biochemical pool and the mixed liquid with a large proportion of reflux are quickly mixed evenly. The mixed liquid is the wastewater treated by the biochemical pool, which is circulated into the pool for treatment. The reflux rate of the mixed liquid can be adjusted by adjusting the air volume of the air flow pusher to adjust the reflux ratio. When the influent concentration is high, the effluent dissolved oxygen (DO) online analyzer and the corresponding aeration blower are interlocked to increase the air supply volume and reflux volume, increase the air volume of the flow pusher, and automatically increase the reflux ratio; otherwise, it will be reduced. S8: At the same time, the dissolved oxygen in the aeration tank is kept at a low and stable level in real time through a precise dissolved oxygen control system, achieving simultaneous nitrification and denitrification while saving energy and reducing consumption; S9: By controlling the sludge concentration, maintaining the volume load and reducing the floor space, improving the impact resistance, and using microorganisms to achieve efficient degradation of COD, ammonia nitrogen and total nitrogen; S10: The liftable microporous aeration hose in the low oxygen aeration zone has an online replacement function. The mud-water mixture enters the high-efficiency inclined plate sedimentation tank from the low oxygen aeration zone. After mud-water separation, the activated sludge flows back to the front inlet area of ​​the biochemical tank to mix with the inlet water. The clean water is collected by the sump at the top of the sedimentation tank. After the water quality reaches the designed effluent index, it is pumped to the high-salt biochemical reactor for further treatment together with other sewage. If it does not meet the standard, it will be sent to the accident water tank for temporary storage.

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