Fermentation pharmaceutical wastewater treatment system

Abstract

A fermentation type pharmaceutical wastewater treatment system is characterized in that a high-concentration wastewater adjusting tank is connected with a first Fenton oxidation tank, the first Fenton oxidation tank is connected with a low-concentration wastewater adjusting tank, the low-concentration wastewater adjusting tank is connected with a coagulative precipitation tank, the coagulative precipitation tank is connected with a hydrolysis acidification tank, the hydrolysis acidification tank is connected with an intermediate water tank, and the intermediate water tank is connected with a water pump. The intermediate water tank is connected with the UASB anaerobic reaction tank, the UASB anaerobic reaction tank is connected with the air flotation device, the air flotation device is connected with the double-AO biochemical tank, the double-AO biochemical tank is connected with the secondary sedimentation tank, the secondary sedimentation tank is connected with the second Fenton oxidation tank, and the second Fenton oxidation tank is connected with the clean water tank. The design is scientific and reasonable, high-concentration wastewater and low-concentration wastewater are collected separately, the quality and quantity of the wastewater are balanced, the high-concentration wastewater is provided with a pretreatment system, and impact on a biochemical system is avoided. The water distributor can adjust the siphonic effect generation water level and the siphonic effect stop water level, so that the treatment cost is saved, the wastewater treatment efficiency is improved, and good social and economic benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a treatment system for fermentation-based pharmaceutical wastewater. Background Technology

[0002] With the rapid development of the pharmaceutical industry, the pollution control of pharmaceutical wastewater has become increasingly serious. The pharmaceutical industry produces a wide variety of products and involves complex processes, with different products having different production processes, resulting in typically complex wastewater compositions. Therefore, treatment is very cumbersome. The pharmaceutical wastewater treatment system described in patent CN216039146U uses the CASS circulating activated sludge method, which requires a balanced influent flow. However, wastewater discharge is often uneven, and the aeration system in the CASS tank frequently becomes clogged, with a single control method. The fermentation pharmaceutical wastewater treatment system described in patent CN115432884A introduces high-concentration wastewater directly into the biological system without pretreatment. The wastewater entering the biological tank has an extremely high and unstable organic matter concentration, which easily impacts the biological system and affects the stability of the microbial community within the biological tank.

[0003] Pulse water distributors are frequently used in wastewater treatment systems. They mainly use a pulse water distribution process to keep the activated sludge in the wastewater tank in a stable floating state, so that the activated sludge can fully contact the wastewater, thereby increasing the contact area between the activated sludge and the wastewater and improving the wastewater treatment efficiency. However, the pulse water distributor described in patent CN110723811A has an adjustable siphon effect water level and the internal condition of the tank cannot be observed from the outside, so it cannot be adjusted according to the actual situation.

[0004] Therefore, for the treatment system of fermentation pharmaceutical wastewater, further improvements and innovations are needed to the existing design and structure to make up for the above-mentioned deficiencies, but so far there have been no relevant public reports. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the existing technology, the purpose of this utility model is to provide a fermentation-based pharmaceutical wastewater treatment system, which can effectively solve the problem that the existing system cannot balance the water quality and quantity of wastewater and is prone to impacting the biochemical system, resulting in poor wastewater treatment effect.

[0006] To achieve the above objectives, the technical solution provided by this utility model is a fermentation-based pharmaceutical wastewater treatment system, comprising a wastewater equalization tank, a hydrolysis acidification tank, a coagulation sedimentation tank, and an intermediate water tank. The wastewater equalization tank includes a high-concentration wastewater equalization tank and a low-concentration wastewater equalization tank. The outlet of the high-concentration wastewater equalization tank is connected to the inlet of a first Fenton oxidation tank via a pipeline. The outlet of the first Fenton oxidation tank is connected to the inlet of the low-concentration wastewater equalization tank via a pipeline. The outlet of the low-concentration wastewater equalization tank is connected to the inlet of the coagulation sedimentation tank via a pipeline. The outlet of the coagulation sedimentation tank is connected to the inlet of the coagulation sedimentation tank via a pipeline. The system is connected to the inlet of the hydrolysis acidification tank, the outlet of the hydrolysis acidification tank is connected to the inlet of the intermediate water tank via a pipe, the outlet of the intermediate water tank is connected to the inlet of the UASB anaerobic reactor via a pipe, the outlet of the UASB anaerobic reactor is connected to the inlet of the air flotation device via a pipe, the outlet of the air flotation device is connected to the inlet of the double AO biological treatment tank via a pipe, the outlet of the double AO biological treatment tank is connected to the inlet of the secondary sedimentation tank via a pipe, the outlet of the secondary sedimentation tank is connected to the inlet of the second Fenton oxidation tank via a pipe, and the outlet of the second Fenton oxidation tank is connected to the inlet of the clear water tank via a pipe.

[0007] This invention features a scientifically sound and rational design, separating high-concentration and low-concentration wastewater collection to balance wastewater quality and quantity. A pretreatment system is installed for high-concentration wastewater to prevent impact on the biological treatment system. The water distributor can adjust the water level at the start and stop of the siphon effect according to actual conditions, saving treatment costs, improving wastewater treatment efficiency, and yielding significant social and economic benefits. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structural connection frame of this utility model.

[0009] Figure 2 This is a schematic diagram of the water distributor structure of this utility model.

[0010] Figure 3 This is a structural diagram of the water outlet pipe adjustment device of this utility model. Detailed Implementation

[0011] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings and specific circumstances.

[0012] As shown in the attached figures, a fermentation-based pharmaceutical wastewater treatment system includes a wastewater equalization tank, a hydrolysis acidification tank, a coagulation sedimentation tank, and an intermediate water tank. The wastewater equalization tank comprises a high-concentration wastewater equalization tank 1 and a low-concentration wastewater equalization tank 3. The outlet of the high-concentration wastewater equalization tank 1 is connected via a pipe to the inlet of a first Fenton oxidation tank 2. The outlet of the first Fenton oxidation tank 2 is connected via a pipe to the inlet of the low-concentration wastewater equalization tank 3. The outlet of the low-concentration wastewater equalization tank 3 is connected via a pipe to the inlet of a coagulation sedimentation tank 4. The outlet of the coagulation sedimentation tank 4 is connected via a pipe to the inlet of a hydrolysis acidification tank 5. The outlet of hydrolysis acidification tank 5 is connected to the inlet of intermediate water tank 6 via a pipeline. The outlet of intermediate water tank 6 is connected to the inlet of UASB anaerobic reactor 7 via a pipeline. The outlet of UASB anaerobic reactor 7 is connected to the inlet of flotation device 8 via a pipeline. The outlet of flotation device 8 is connected to the inlet of double AO biological treatment tank 9 via a pipeline. The outlet of double AO biological treatment tank 9 is connected to the inlet of secondary sedimentation tank 10 via a pipeline. The outlet of secondary sedimentation tank 10 is connected to the inlet of second Fenton oxidation tank 11 via a pipeline. The outlet of second Fenton oxidation tank 11 is connected to the inlet of clear water tank 12 via a pipeline.

[0013] To ensure better implementation results, the sludge outlets of the first Fenton oxidation tank 2, coagulation sedimentation tank 4, air flotation device 8 and secondary sedimentation tank 10 are respectively connected to the inlet of sludge tank 13 via pipelines.

[0014] The bottom of the high-concentration wastewater equalization tank 1, the low-concentration wastewater equalization tank 3, and the intermediate water tank 6 are all equipped with UPVC perforated aeration pipes. The pipes have symmetrical openings at a downward angle of 45°, with a hole diameter of 5mm and a spacing of 1500mm.

[0015] The first Fenton oxidation tank 2 and the second Fenton oxidation tank 11 have the same structure. The first Fenton oxidation tank 2 includes a primary dosing tank, a secondary reaction tank, a tertiary dosing tank and a quaternary sedimentation tank that are connected in sequence. The primary dosing tank and the tertiary dosing tank each have three connected dosing zones. The outlet of the high-concentration wastewater equalization tank 1 is connected to the primary dosing tank via a pipe. The outlet of the quaternary sedimentation tank is connected to the inlet of the low-concentration wastewater equalization tank 3 via a pipe.

[0016] The hydrolysis acidification tank 5 is equipped with a water distributor, which includes a water storage tank 57, an inspection port 52, and water storage tank support legs 511. The water storage tank 57 has four support legs 511 at its lower corners, an inspection port 52 at its top, a connected inlet pipe 56 on the upper side of the water storage tank 57, and a connected vent pipe 59 on the lower side of the water storage tank 57. A valve is installed on the vent pipe 59. A fixing nut 53 is fixedly installed at the center of the top of the water storage tank 57. An inner bell jar 55 is installed inside the water storage tank 57. The upper center is fixed with an inner bell nut 54. The adjusting threaded rod 51 passes through the fixed nut 53 and extends into the water storage tank 57 and is fixed together with the inner bell nut 54. The inner bell 55 is equipped with an outlet pipe 58. The horizontal line of the outlet pipe 58 is lower than the horizontal line of the inlet pipe 56. The bottom of the water storage tank 57 is equipped with a connected outlet pipe adjusting device 510. The outlet of the outlet pipe 58 passes through the outlet pipe adjusting device 510 and extends out of the water storage tank 57. A flexible joint 512 is installed on the outlet pipe 58 located outside the water storage tank 57.

[0017] The water outlet pipe adjusting device 510 includes an outer pipe 14, a fixing clip 15, and a nut sleeve 16. The outer pipe 14 is fixedly installed at the bottom of the water storage tank 57. The fixing clip 15 is fitted onto the end of the water storage tank 57. The outer circumferential surface of the fixing clip 15 is provided with external threads. One end of the fixing clip 15 is provided with an integral inward stepped flange 17. The outer circumferential surface of the stepped flange 17 is an inward inclined surface. The end of the fixing clip 15 and the circumferential surface of the stepped flange 17 are provided with evenly distributed integral grooves 18. The nut sleeve 16 is threadedly connected and fitted onto the outside of the fixing clip 15. The inner surface of one end of the nut sleeve 16 is an inclined surface that matches the outer inclined surface of the stepped flange 17. The length of the nut sleeve 16 is the same as the length of the threaded section of the fixing clip 15.

[0018] When it is necessary to adjust the extension and retraction of the water outlet pipe 8, rotating the nut sleeve 16 can tighten the groove 18 to hold the water outlet pipe 8 tightly, thereby reducing the water flow, or loosen the groove 18 to completely release the water outlet pipe 8, thereby increasing the water flow.

[0019] The water storage tank 57 has a viewing window 513 at the corresponding position of the inner bell 55 and the water outlet pipe 58, which facilitates observation of the relative positions of the inner bell 55 and the water outlet pipe 58.

[0020] The working principle of this utility model is as follows:

[0021] 1) High-concentration wastewater equalization tank 1

[0022] The wastewater equalization tank balances the flow rate of wastewater entering the treatment system, preventing fluctuations in influent flow from causing excessive or insufficient load on the treatment equipment and ensuring stable operation of the system. High-concentration wastewater remains in the high-concentration wastewater equalization tank 1 for no less than 12 hours. UPVC perforated aeration pipes are installed at the bottom of the high-concentration wastewater equalization tank 1, with symmetrical downward-sloping 45° openings, each 5mm in diameter and spaced 1500mm apart. The equalized wastewater then enters the first Fenton oxidation tank 2.

[0023] 2) First Fenton oxidation tank 2

[0024] Fenton's reagent is essentially H2O2 in Fe 2+ Under the catalytic action of [a catalyst], highly reactive hydroxyl radicals (·OH) are generated. ·OH can react with most organic compounds, causing their degradation. H2O2 in Fe [a catalyst]... 2+ Under the catalytic action of Fe, it decomposes to produce ·OH, with an oxidation potential reaching 2.8V. It is the strongest inorganic oxidant besides elemental fluorine, oxidizing and decomposing organic matter into smaller molecules through electron transfer and other pathways. Simultaneously, Fe... 2+ Oxidized to Fe 3+ It produces coagulation and sedimentation, removing a large amount of organic matter. Therefore, Fenton's reagent has both oxidation and coagulation effects in water treatment.

[0025] The first Fenton oxidation tank (Fenton advanced oxidation system) 2 comprises a primary dosing tank, a secondary reaction tank, a tertiary dosing tank, and a quaternary sedimentation tank connected in sequence. The primary dosing tank is divided into three compartments, each with a wastewater retention time of 12 minutes. Each compartment is equipped with a 0.75kW steel-lined plastic paddle mixer. In the first compartment, 30% dilute sulfuric acid is added to adjust the wastewater pH to 3; in the second compartment, 20% ferrous sulfate heptahydrate is added; and in the third compartment, 30% hydrogen peroxide is added. The secondary reaction tank is equipped with a UPVC aeration and mixing system at the bottom. The aeration pipes have symmetrically symmetrically perforated holes at a 45° downward angle, with a hole diameter of 5mm and a spacing of 1000mm. The tertiary dosing tank is also divided into three compartments, each with a wastewater retention time of 12 minutes. Each compartment is equipped with a 0.75kW steel-lined plastic paddle mixer. In the first compartment, 30% alkaline solution is added to adjust the wastewater pH to 7; in the second compartment, PAC is added; and in the third compartment, PAM is added. The four-stage sedimentation tank has a sludge collection hopper at the bottom with a slope greater than 45°. A UPVC sludge discharge system is installed at the bottom of the hopper, with discharge holes angled downwards at 45° and staggered, each hole having a diameter of 30mm and a spacing of 500mm. An inclined tube packing layer with a specification of φ80*0.8mm is installed in the middle of the four-stage sedimentation zone; the surface loading of the sedimentation zone is set at 0.65m. 3 / (m 2 *h). The treated wastewater, along with the low-concentration wastewater, enters the low-concentration wastewater equalization tank 3.

[0026] 3) Low-concentration wastewater equalization tank 3

[0027] The low-concentration wastewater equalization tank 3 balances the flow rate of wastewater entering the treatment system, preventing excessive or insufficient load on the treatment equipment due to fluctuations in influent flow, and ensuring stable operation of the treatment system. The wastewater retention time in the low-concentration wastewater equalization tank 3 is no less than 12 hours; UPVC perforated aeration pipes are installed at the bottom, with symmetrical downward-sloping 45° openings, each 5mm in diameter and spaced 1500mm apart. The equalized wastewater then enters the coagulation sedimentation tank 4.

[0028] 4) Coagulation sedimentation tank 4

[0029] Mixing Section: Mixing is the first and crucial step in the reaction process. During this process, the hydrolysis products of coagulants and flocculants rapidly diffuse into every part of the water, causing all colloidal particles to destabilize and aggregate almost simultaneously, thus achieving a good flocculation effect. The main function of this process is mixing, hence it is generally called the mixing process. The essence of the mixing problem is the diffusion of the hydrolysis products of the agents in the water. Simultaneous destabilization and aggregation of colloidal particles in the water is a prerequisite for achieving a good flocculation effect and is also key to saving on the dosage. In the mixing zone, the wastewater retention time is 12 minutes, and a 0.75 kW paddle mixer is used at a speed of 50 r / min.

[0030] Flocculation Reaction Section: Flocculation is the most crucial process in water treatment, and the quality of the effluent is primarily determined by the flocculation effect. Coagulants and flocculants are thoroughly mixed and reacted in the mixing reaction unit to make the flocs more prominent and improve the flocculation effect. In the flocculation zone, the wastewater retention time is 12 minutes, and a 0.75kW plate and frame mixer is used at a speed of 20 r / min.

[0031] Sedimentation Section: The sedimentation equipment is a crucial step in the water treatment process for separating sludge from water, and its operational status directly affects the effluent quality. A sludge collection hopper with a slope greater than 45° is installed at the bottom of the sedimentation zone. A UPVC sludge discharge system is installed at the bottom of the hopper, with discharge holes staggered downwards at 45° angles, each 30mm in diameter and spaced 500mm apart. An inclined tube packing layer with φ80*0.8mm packing material is installed in the middle section; the surface loading of the sedimentation zone is set at 0.65m². 3 / (m 2 *h). After coagulation and sedimentation treatment, the wastewater enters the hydrolysis acidification tank 5, and the sedimented part enters the sludge tank 13 through pipeline.

[0032] 5) Hydrolysis acidification tank 5

[0033] The hydrolysis stage is an essential process in the degradation of macromolecular organic matter. For macromolecular organic matter to be utilized by microorganisms, it must first be hydrolyzed into smaller molecules, allowing them to enter bacterial cells for further degradation. The acidification stage accelerates the degradation process because it further transforms the hydrolyzed smaller molecules into simpler compounds that are then secreted extracellularly. The hydraulic retention time of wastewater in hydrolysis-acidification tank 5 is 6 hours.

[0034] The hydrolysis acidification tank 5 is equipped with an HA-1500 type water distributor. The stainless steel water storage tank 57 has a diameter of φ1500mm and a height of 1500mm; the bottom support legs 511 of the water storage tank 57 are 800mm high and made of 10# I-beams; the top of the water storage tank 57 has a φ6000mm inspection port 52 for regular inspection; an inlet pipe 56 with a diameter of DN150 is installed on the upper side of the water storage tank 57; an inner bell jar 55 with a diameter of φ500mm and a height of 900mm is installed inside the water storage tank 57; the adjusting threaded rod 51 passes through the fixing nut 53 and the water storage tank 57, and is 400mm higher than the water storage tank 57; an outlet pipe 58 with a diameter of DN200 is installed inside the inner bell jar 55, and the outlet pipe 58 must be lower than the inlet pipe 56.

[0035] The height of the inner bell jar 5 can be adjusted by rotating the adjusting screw rod 1, thereby regulating the stopping liquid level of the siphon effect. The outlet pipe 58 can also be adjusted by extending or retracting the outlet pipe adjusting device 10, thus regulating the liquid level at which the siphon effect occurs. By adjusting these two liquid levels, the frequency and volume of the pulsed water distribution from the distributor can be controlled. During adjustment, the relative positions of the inner bell jar and the outlet pipe can be observed through the viewing window 13 to find the optimal position for wastewater treatment. The hydrolyzed and acidified wastewater enters the intermediate water tank 6 for temporary storage.

[0036] 6) Intermediate water tank 6

[0037] Intermediate tank 6 is used for temporary wastewater storage, with a wastewater retention time of 1 hour. UPVC perforated aeration pipes are installed at the bottom of the tank, with symmetrical downward-sloping 45° openings, each 5mm in diameter and spaced 1500mm apart. The treated wastewater then enters UASB anaerobic reactor 7.

[0038] 7) UASB anaerobic reactor 7

[0039] Wastewater enters UASB anaerobic reactor 7 from bottom to top. At the bottom of the UASB reactor in UASB anaerobic reactor 7 is a high-concentration, highly active sludge bed, where most of the organic pollutants in the wastewater are degraded into methane and carbon dioxide through anaerobic fermentation. Due to the agitation of water flow and bubbles, a sludge suspension layer forms above the sludge bed. A three-phase separator is installed at the top of the reactor to separate digester gas, digestate, and sludge particles. Digester gas is discharged from the top of the reactor; sludge particles automatically slide down and settle to the sludge bed at the bottom of the reactor; and digestate is discharged from the clarification zone.

[0040] Volumetric loading capacity can reach 20 kg COD / (m³) 3•d), COD removal rates can be consistently maintained at around 80%. Sludge production is generally 0.05 kg VSS / kg COD to 0.10 kg VSS / kg COD, only about 1 / 5 of the sludge produced by activated sludge. The excess sludge produced by the reactor is also essential for the operation of the new anaerobic system. The treated wastewater enters the air flotation unit 8.

[0041] 8) Air flotation device 8

[0042] The air flotation device 8 introduces air into the water in the form of tiny bubbles, causing the tiny bubbles to adhere to the suspended particles in the water, forming a three-phase mixed system of water, air, and particles. After the particles adhere to the bubbles, their density is less than that of water, so they float to the surface and form a scum layer, which is then separated from the water.

[0043] The air flotation unit 8 has two dosing zones at the front end, with a wastewater retention time of 12 minutes per zone. Each zone is equipped with a 0.75kW steel-lined plastic paddle mixer. PAC is added to the first zone, and PAM is added to the second. A TJ-3 dissolved air release system is located in the middle. The rear end includes a sludge scraping zone, a sedimentation zone, and a clear water zone. The treated wastewater enters the dual AO biological treatment tank 9, and the sedimented portion flows through a pipeline into the sludge tank 13.

[0044] 9) Dual AO Biochemical Pool 9

[0045] The dual-AO biological treatment tank 9 adopts a dual-A / O process. Through special operating parameter control, it realizes short-cut nitrification and denitrification denitrification operation within the system, which improves the ammonia nitrogen removal rate and saves energy.

[0046] The anoxic tank (Tank A) primarily removes total nitrogen from the wastewater. Under the action of denitrifying bacteria, nitrate nitrogen in the wastewater is reduced to nitrogen gas and discharged outside the tank. A 0.85kW submersible mixer is installed in the anoxic tank, and φ150 aldehyde-modified polyester filament packing material is placed in the middle. The dissolved oxygen level in the tank is controlled at 0.35mg / L.

[0047] The aerobic tank (O tank) primarily removes ammonia nitrogen and organic matter from wastewater. It utilizes the metabolic activity of aerobic microorganisms to oxidize and degrade organic pollutants into carbon dioxide and water under aerobic conditions—a biological treatment process. The aerobic tank is equipped with two liftable aerators (DN65×1000mm each), made of EPDM; φ150 aldehyde-modified polyester filament packing material; dissolved oxygen levels are maintained above 2.0 mg / L; and an internal circulating water pump is included.

[0048] Compared to traditional biological nitrogen removal processes, the dual A / O process reduces air consumption by 20% and alkali solution consumption by 40%, thus lowering operating costs. The dual A / O process achieves a COD removal rate of 90-95%, an NH3-N removal rate of 95-99.9%, and a COD volumetric loading rate of 0.4-0.6 kg / (m³) in the biological treatment tank. 3•d) The biochemical section is continuous, with fewer structures and a shorter process, saving investment; the internal return flow is small, saving operating costs; high-concentration influent can be used as a carbon source supplement, and the treated wastewater enters the secondary sedimentation tank 10.

[0049] 10) Secondary sedimentation tank 10

[0050] The primary function of the secondary sedimentation tank 10 is sludge-water separation. It is a secondary sedimentation tank with a secondary flow path. A sludge collection hopper with a slope greater than 45° is installed at the bottom of the tank. A φ300 central guide tube with a reflector plate is installed in the middle. A surrounding weir with a height of 300mm is installed at the top of the tank. The wastewater after secondary sedimentation enters the second Fenton oxidation tank 11, and the sedimented portion flows through a pipeline into the sludge tank 13.

[0051] 11) Second Fenton oxidation tank 11

[0052] The second Fenton oxidation tank (Fenton advanced oxidation system) 11 comprises a primary dosing tank, a secondary reaction tank, a tertiary dosing tank, and a quaternary sedimentation tank connected in sequence. The primary dosing tank is divided into three compartments, each with a wastewater retention time of 12 minutes. Each compartment is equipped with a 0.75kW steel-lined plastic paddle mixer. In the first compartment, 30% dilute sulfuric acid is added to adjust the wastewater pH to 3; in the second compartment, 20% ferrous sulfate heptahydrate is added; and in the third compartment, 30% hydrogen peroxide is added. The secondary reaction tank is equipped with a UPVC aeration and mixing system at the bottom. The aeration pipes have symmetrically symmetrically perforated holes at a 45° downward angle, with a hole diameter of 5mm and a spacing of 1000mm. The tertiary dosing tank is also divided into three compartments, each with a wastewater retention time of 12 minutes. Each compartment is equipped with a 0.75kW steel-lined plastic paddle mixer. In the first compartment, 30% alkaline solution is added to adjust the wastewater pH to 7; in the second compartment, PAC is added; and in the third compartment, PAM is added. The four-stage sedimentation tank has a sludge collection hopper at the bottom with a slope greater than 45°. A UPVC sludge discharge system is installed at the bottom of the hopper, with discharge holes angled downwards at 45° and staggered, each hole having a diameter of 30mm and a spacing of 500mm. An inclined tube packing layer with a specification of φ80×0.8mm is installed in the middle of the four-stage sedimentation zone; the surface loading of the sedimentation zone is set at 0.65m. 3 / (m 2 *h). The treated wastewater is temporarily stored in clear water tank 12.

[0053] 13) Sludge Tank 13

[0054] During the wastewater treatment process, the excess sludge generated from the first Fenton oxidation tank 2, coagulation sedimentation tank 4, air flotation device 8, and secondary sedimentation tank 10 is discharged to sludge tank 13. After being concentrated in sludge tank 13, it is dewatered by a screw press and then transported off-site.

[0055] This utility model has produced very good results in actual use and practice, as detailed below:

[0056] Table 1. Comparison of wastewater treatment with existing systems

[0057]

[0058] Table 2 Comparison of wastewater treatment with existing water distributors

[0059]

[0060] As shown in the table above, this invention significantly improves the COD treatment capacity of fermentation pharmaceutical wastewater (by more than 1.08 times) and the influent NH3-N treatment capacity (by 1.32 times), indicating that this invention has a stronger wastewater treatment capacity and is suitable for receiving high-concentration wastewater with complex water quality.

[0061] The HA-1500 water distributor, with its precise pulse frequency and water volume, effectively agitates the sludge at the bottom of the tank, ensuring thorough mixing with the wastewater. This enhances the contact between the wastewater and microorganisms, allowing for more complete interaction between anaerobic bacteria and organic matter in the wastewater. This significantly improves the removal rate of various wastewater pollutants in the hydrolysis acidification tank.

[0062] The wastewater treatment and effluent quality of this utility model are shown in the table below:

[0063] Table 3 Influent Water Quality

[0064]

[0065] Table 4. Effluent Water Quality

[0066]

[0067] This utility model is scientifically and rationally designed, and has the following advantages compared with the prior art:

[0068] 1. Significantly improved the removal capacity of pollutants in fermentation pharmaceutical wastewater, with COD removal rate reaching 97.5%, BOD5 removal rate reaching 97%, ammonia nitrogen removal rate reaching 92.5%, and total nitrogen removal rate reaching 90%;

[0069] 2. This utility model treats raw water before discharge, significantly reducing pollutant discharge and alleviating the pressure on the wastewater treatment plant in the project area. Based on the prescribed total pollutant control targets, the annual reduction of major pollutants is calculated as follows (water volume based on 400m³). 3 (Based on a system operation period of 350 days / year)

[0070] CODcr: (12000-300)×400×350 / (1000×1000)=1638 tons / year

[0071] NH3-N: (400-30)×400×350 / (1000×1000)=51.8 tons / year;

[0072] 3. High-concentration wastewater and low-concentration wastewater are collected separately to balance the quality and quantity of wastewater; a pretreatment system is set up for high-concentration wastewater to reduce the concentration of organic matter in the wastewater and convert recalcitrant organic matter into readily degradable organic matter, so as to avoid impacting the biological system.

[0073] 4. By adjusting the height of the inner bell jar and outlet pipe of the HA-1500 water distributor, the pulse water volume and frequency can be adjusted, further improving the precision and efficiency of the pulse water distributor in the hydrolysis acidification tank. Precise pulse frequency and water volume better agitate the sludge at the bottom of the tank, ensuring thorough mixing with the wastewater and enhancing the contact between wastewater and microorganisms. This allows for more complete contact and reaction between anaerobic bacteria and organic matter in the wastewater. The HA-1500 water distributor has low energy consumption during operation, and due to its high efficiency, it can complete precise water distribution in a short time, thereby reducing the overall energy consumption of the treatment system, saving treatment costs, and improving wastewater treatment efficiency, resulting in significant social and economic benefits.

[0074] It should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any person skilled in the art who can make changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution shall fall within the protection scope of the present utility model.

Claims

1. A fermentation pharmaceutical waste water treatment system comprising a waste water conditioning tank, a hydrolytic acidification tank, a coagulation sedimentation tank, and an intermediate water tank, characterized by, The wastewater conditioning tank comprises a high-concentration wastewater conditioning tank (1) and a low-concentration wastewater conditioning tank (3), the outlet of the high-concentration wastewater conditioning tank (1) is connected to the inlet of a first Fenton oxidation tank (2) through a pipeline, the outlet of the first Fenton oxidation tank (2) is connected to the inlet of the low-concentration wastewater conditioning tank (3) through a pipeline, the outlet of the low-concentration wastewater conditioning tank (3) is connected to the inlet of a coagulation sedimentation tank (4) through a pipeline, the outlet of the coagulation sedimentation tank (4) is connected to the inlet of a hydrolysis acidification tank (5) through a pipeline, the outlet of the hydrolysis acidification tank (5) is connected to the inlet of an intermediate tank (6) through a pipeline, the outlet of the intermediate tank (6) is connected to the inlet of a UASB anaerobic reaction tank (7) through a pipeline, the outlet of the UASB anaerobic reaction tank (7) is connected to the inlet of a flotation device (8) through a pipeline, the outlet of the flotation device (8) is connected to the inlet of a double-AO biochemical tank (9) through a pipeline, the outlet of the double-AO biochemical tank (9) is connected to the inlet of a secondary sedimentation tank (10) through a pipeline, the outlet of the secondary sedimentation tank (10) is connected to the inlet of a second Fenton oxidation tank (11) through a pipeline, and the outlet of the second Fenton oxidation tank (11) is connected to the inlet of a clear water tank (12) through a pipeline.

2. The fermentation pharmaceutical waste water treatment system according to claim 1, wherein The sludge outlets of the first Fenton oxidation tank (2), the coagulation sedimentation tank (4), the flotation device (8) and the secondary sedimentation tank (10) are connected to the inlet of a sludge tank (13) through pipelines.

3. The fermentation pharmaceutical waste water treatment system according to claim 1, wherein The high-concentration wastewater conditioning tank (1), the low-concentration wastewater conditioning tank (3) and the intermediate tank (6) are each provided with a UPVC perforated aeration pipe at the inner bottom, the pipe body is provided with symmetrical holes inclined downward by 45°, the hole diameter is 5 mm, and the spacing is 1500 mm.

4. The fermentation pharmaceutical waste water treatment system according to claim 1, wherein The first Fenton oxidation tank (2) and the second Fenton oxidation tank (11) are the same in structure, the first Fenton oxidation tank (2) comprises a first-stage dosing tank, a second-stage reaction tank, a third-stage dosing tank and a fourth-stage sedimentation tank which are connected in sequence, three dosing compartments are arranged in the first-stage dosing tank and the third-stage dosing tank and connected to each other, the outlet of the high-concentration wastewater conditioning tank (1) is connected to the first-stage dosing tank through a pipeline, and the outlet of the fourth-stage sedimentation tank is connected to the inlet of the low-concentration wastewater conditioning tank (3) through a pipeline.

5. The fermentation pharmaceutical waste water treatment system according to claim 1, wherein The hydrolytic acidification tank (5) is internally provided with a water distributor, the water distributor comprises a water storage tank body (57), an inspection port (52) and water storage tank body supporting legs (511), the water storage tank body (57) is provided with the water storage tank body supporting legs (511) at four corners of the lower surface, the upper surface of the water storage tank body (57) is provided with the inspection port (52), the side edge of the upper portion of the water storage tank body (57) is provided with the water inlet pipe (56) connected therewith, the side edge of the lower portion of the water storage tank body (57) is provided with the vent pipe (59) connected therewith, the vent pipe (59) is provided with a valve, the upper center of the water storage tank body (57) is fixedly provided with a fixed point nut (53), the water storage tank body (57) is internally provided with an inner bell jar (55), the upper center of the inner bell jar (55) is fixedly provided with an inner bell jar fixed nut (54), an adjusting threaded rod (51) penetrates through the fixed point nut (53) and is fixedly connected with the inner bell jar fixed nut (54) in the water storage tank body (57), the inner bell jar (55) is internally provided with the water outlet pipe (58), the water outlet pipe (58) is located at a horizontal line lower than that of the water inlet pipe (56), the bottom of the water storage tank body (57) is provided with the water outlet pipe adjusting device (510) connected therewith, the water outlet of the water outlet pipe (58) penetrates through the water outlet pipe adjusting device (510) and extends out of the water storage tank body (57), the water outlet pipe (58) located outside the water storage tank body (57) is provided with a flexible joint (512).

6. The fermentation pharmaceutical waste water treatment system according to claim 5, wherein The water outlet pipe adjusting device (510) comprises an outer pipe (14), a fixed joint clamp (15) and a nut sleeve (16), the outer pipe (14) is fixedly arranged at the bottom of the water storage tank body (57), the fixed joint clamp (15) is sleeved on the end of the water storage tank body (57), the outer periphery of the fixed joint clamp (15) is provided with external threads, one end of the fixed joint clamp (15) is provided with an integral inward stepped flange (17), the outer periphery of the stepped flange (17) is an inward inclined surface, the end of the fixed joint clamp (15) and the periphery of the stepped flange (17) are provided with integral uniformly distributed slits (18), the nut sleeve (16) is sleeved on the outside of the fixed joint clamp (15) through threaded connection, the inner surface of one end of the nut sleeve (16) is an inclined surface matched with the inclined surface of the outer surface of the stepped flange (17), the length of the nut sleeve (16) is the same as the length of the threaded section of the fixed joint clamp (15).

7. The fermentation pharmaceutical waste water treatment system according to claim 5, wherein The water storage tank body (57) is provided with a visual observation window (513) corresponding to the inner bell jar (55) and the water outlet pipe (58), so that the relative positions of the inner bell jar (55) and the water outlet pipe (58) can be observed.

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