A low-carbon, efficient and sustainable medical park wastewater treatment device

Abstract

The utility model relates to a kind of medical park wastewater low carbon, high efficiency, sustainable processing device, wastewater in pretreatment pool flows into ozone catalytic oxidation pool, wastewater in ozone catalytic oxidation pool flows into hydrolytic acidification pool, wastewater in hydrolytic acidification pool flows into integrated biological reaction pool, wastewater in integrated biological reaction pool flows into sedimentation tank, supernatant in sedimentation tank flows into fibre carousel filter tank, wastewater in fibre carousel filter tank flows into active coke adsorption pool.Affirmative effect is: under the strong oxidation of ozone, organic matter and toxic and harmful substances in water are decomposed and reduced, improving the biodegradability of wastewater, alleviating the toxic effect of residual drug substances in wastewater, fully exerting the microbial biochemical treatment function of efficient integrated biological reaction pool, maximizing the degradation of organic matter, ammonia nitrogen, total nitrogen and total phosphorus, setting active coke adsorption pool, adsorbing and regenerating part of substances that cannot be biologically treated, to ensure that effluent is qualified.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wastewater treatment, specifically relates to a kind of medical park wastewater low carbon, efficient, sustainable treatment device. BACKGROUND

[0002] Pharmaceutical industrial wastewater of medical park mainly includes: fermentation pharmaceutical production wastewater, biological engineering pharmaceutical production wastewater, chemical synthesis pharmaceutical production wastewater, traditional Chinese medicine production wastewater, extraction pharmaceutical production wastewater and mixed preparation production wastewater.

[0003] Pharmaceutical production wastewater composition is greatly different according to different types of pharmaceutical products, pharmaceutical process, raw materials etc., and the characteristics of Chinese medicine wastewater are containing saccharide, glycosides, organic pigment, anthraquinone, alkaloid, cellulose, lignin and other organic matters, high solid suspension content, more silt and dregs, and the composition of chemical synthetic drug wastewater is more complex, such as antibiotic residue, intermediate, raw material and organic solvent etc., high salt content, high toxicity, complex composition, difficult degradation.

[0004] COD of pharmaceutical wastewater mainly comes from reactants, solvents, products, byproducts, and pollutants mainly include antibiotics, DMF, THF, acetone, chloroform, benzene, inhibit microbial activity, high salt content in wastewater can make microbial cells dehydrate inactivation even death, exceed the limit of conventional biochemical treatment, increase the density of wastewater, accelerate sludge floating, and corrode equipment.

[0005] At present, common pharmaceutical wastewater treatment technology mainly includes physical method, chemical method and biological method, wherein, physical method includes: homogenization, dilution, sedimentation, floating, filtration, concentration crystallization, adsorption, extraction, reverse osmosis etc., chemical method includes: coagulation sedimentation, ion exchange, electrodialysis, incineration and neutralization, oxidation and other chemical reactions, and biological method includes: activated sludge, SBR, biological filter and other aerobic treatment method and anaerobic treatment method. In the face of unstable, irregular, difficult-to-degrade pharmaceutical wastewater, the use of single technology cannot well solve the problem, and often needs to use different processes to realize standard discharge.

[0006] In view of the problems of unstable effluent quality, CODcr and ammonia nitrogen and other pollutants exceeding standard phenomenon and large land occupation of main process in current common pharmaceutical wastewater treatment process, through the pilot study of using "ozone catalytic oxidation + biological reaction" to pharmaceutical wastewater, the main process for medical park wastewater treatment is summarized, so as to provide a new solution for this type of wastewater treatment.

[0007] Medical park wastewater also has the following main water quality characteristics:

[0008] 1) Large difference in composition, complex composition, large amount of pollutants, high CODcr in wastewater;

[0009] 2) BOD5 and CODcr ratio is low and fluctuation, biodegradability is very poor;

[0010] 3) difficult to degrade many, strong toxicity, water quality and the type of pollutants fluctuation. Practical new type content

[0011] The technical problems to be solved by the utility model are to provide a low-carbon, efficient and sustainable treatment device for medical park wastewater, so as to overcome the above-mentioned deficiencies in the prior art.

[0012] The technical scheme for solving the above-mentioned technical problems is as follows: a low-carbon, efficient and sustainable treatment device for medical park wastewater comprises: a pretreatment tank, wastewater in the pretreatment tank flows into an ozone catalytic oxidation tank, wastewater in the ozone catalytic oxidation tank flows into a hydrolysis acidification tank, wastewater in the hydrolysis acidification tank flows into an integrated biological reaction tank, wastewater in the integrated biological reaction tank flows into a sedimentation tank, supernatant in the sedimentation tank flows into a fiber rotating disc filter tank, and wastewater in the fiber rotating disc filter tank flows into an activated coke adsorption tank.

[0013] On the basis of the above-mentioned technical scheme, the utility model can also be improved as follows.

[0014] Further, the hydraulic retention time in the ozone catalytic oxidation tank is 0.5h-2h, and the ozone addition ratio M (O3) :M (COD) of the ozone catalytic oxidation tank is (1.0-1.5) :1.

[0015] Further, the hydraulic retention time in the hydrolysis acidification tank is 8h-12h.

[0016] Further, the hydrolysis acidification tank is provided with an alkalinity supplementing device on one side.

[0017] Further, the hydraulic retention time in the integrated biological reaction tank is 32h-40h, the total sludge load is 0.036kgBOD5 / (kgMLSS.d) -0.042kgBOD5 / (kgMLSS.d), the effective water depth in the integrated biological reaction tank is 10.5m, and the mixed liquid suspended solid concentration in the integrated biological reaction tank is greater than or equal to 8000mg / L.

[0018] Further, a static fixed overflow weir is used in the integrated biological reaction tank.

[0019] Further, the surface load of the sedimentation tank is 10m 3 / (m 2 ·h) -15m 3 / (m 2 ·h), and the sludge reflux ratio is 3%-5%.

[0020] Further, the filtration speed of the activated coke adsorption tank is 3m3 (m 2 h)~5m 3 (m 2 h), the hydraulic retention time is 3h~4h.

[0021] The utility model has the advantages of:

[0022] In the utility model, the pretreatment pool is used for collecting wastewater and performing conventional pretreatment;

[0023] The wastewater after conventional pretreatment is introduced into the ozone catalytic oxidation pool, and under the double catalytic oxidation of ozone and catalyst, the ring-opening and chain-breaking of part of macromolecular organic matters in water are performed, the toxic and harmful substances in wastewater are reduced, the removal rate of CODcr of wastewater reaches 10%~20%, the wastewater treatment liquid with better biodegradability and weakened biological inhibition is preliminarily obtained, and the stable operation of the subsequent biochemical process has a great effect;

[0024] The wastewater treatment liquid after treatment of the ozone catalytic oxidation pool is introduced into the hydrolysis acidification pool, and hydrolysis acidification is performed under the anoxic environment condition, the biodegradability of wastewater is further improved, and under the action of anaerobic and facultative bacteria in the hydrolysis and acidification stages, there is a removal efficiency of nearly 10%~20%, the hydrolysis acidification effect is effectively exerted, the refractory macromolecular substances in wastewater are converted into small molecules, the small-molecule organic matters are further degraded and removed, the small-molecule organic matters are degraded and utilized by microorganisms, the treatment load of the subsequent treatment unit is reduced, the buffer effect on the subsequent biochemical treatment unit is achieved, and the impact frequency on the integrated biological reaction pool is reduced;

[0025] The wastewater treatment liquid after treatment of the hydrolysis acidification pool is introduced into the integrated biological reaction pool, the granular sludge is fully adsorbed, degraded and utilized under the anoxic, anaerobic microenvironment of the granular sludge in the aerobic environment and between different levels of the granular sludge, the organic matters in wastewater are gradually degraded into CO2 and H2O, and the ammonia nitrogen in wastewater is simultaneously converted into nitrate nitrogen and nitrogen, the integrated biological reaction pool adopts the SBR operation mode, and adopts the fixed weir water outlet form, that is, in the water inlet stage, wastewater is introduced into the bottom of the reactor, so that the wastewater treated in the previous cycle can be replaced or "pushed out" of the reactor;

[0026] The wastewater treatment liquid treated by the integrated biological reaction tank enters a sedimentation tank, under the dual action of coagulant and flocculant, large particle flocs are formed and an active sludge layer is formed, that is, aerobic granular sludge which can quickly settle is cultivated, which is completely different from the slow-settling flocculent sludge used in the traditional simultaneous nitrogen and phosphorus removal system, and due to the special spherical structure, the granular sludge has better impact resistance and salt tolerance than the traditional process, and has good nitrogen and phosphorus removal effect under high salt conditions, while improving the settling speed of the flocs, the sludge and water are further separated under the interception of the active sludge layer, and the effluent quality is improved, the pilot test shows that the carbon removal, nitrogen and phosphorus removal capacity is strong, and the water quality fluctuation has little effect on the stability of the effluent effect, compared with the traditional activated sludge process, the integrated biological tank has obvious advantages in land occupation area, energy consumption and cost, and the existence of short-cut nitrification and denitrification reduces the oxygen demand and improves the TN removal efficiency;

[0027] The supernatant after precipitation in the sedimentation tank enters a fiber rotating disc filter tank to further remove suspended solids;

[0028] The wastewater treatment liquid treated by the fiber rotating disc filter tank enters an active coke adsorption tank, and part of the organic matter which cannot be biodegraded and part of the suspended solids which escape are adsorbed, regenerated and utilized, so that the chroma and CODcr are further removed, and the final water quality is guaranteed, the active coke adsorption tank is upward flow, the sewage enters the water distributor at the bottom of the adsorption tank, and then uniformly distributes water and passes through the entire coke layer upward, and the system is provided with coke discharging, coke washing, coke supplementing and regeneration systems, so that the coke is automatically discharged, washed and supplemented according to the water quality of the inlet and outlet, the active coke layer with large adsorption capacity is always located at the top end of the adsorption tank, and the water quality of the outlet is guaranteed, compared with other technologies, the active coke adsorption technology is a low-carbon, pollution-free and sustainable water treatment technology with the advantages of low investment, small occupation area, high reuse rate and good water quality, and has great advantages in decolorization and CODcr removal in deep treatment of pharmaceutical and chemical industries, and is less affected by temperature, inlet water quality and water quantity fluctuation and has strong impact resistance;

[0029] Therefore, it is known that the main process route of the ozone catalytic oxidation tank + hydrolysis acidification tank + integrated biological reaction tank + sedimentation tank + fiber rotating disc filter tank + active coke adsorption tank is feasible, and the treatment of the pharmaceutical park wastewater is efficient, low-carbon and sustainable. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure diagram of the low-carbon, efficient and sustainable treatment device for pharmaceutical park wastewater.

[0031] In the drawings, the components represented by the numbers are listed as follows:

[0032] 1, pre-treatment tank, 2, ozone catalytic oxidation tank, 3, hydrolysis acidification tank, 4, integrated biological reaction tank, 5, sedimentation tank, 6, fiber rotating disc filter tank, 7, activated coke adsorption tank. DETAILED DESCRIPTION

[0033] The principles and characteristics of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and are not intended to limit the scope of the present application.

[0034] Example 1

[0035] As Figure 1 shown, a low-carbon, efficient and sustainable medical park wastewater treatment device comprises:

[0036] The pre-treatment tank 1, the ozone catalytic oxidation tank 2, the hydrolysis acidification tank 3, the integrated biological reaction tank 4, the sedimentation tank 5, the fiber rotating disc filter tank 6 and the activated coke adsorption tank 7 are sequentially connected in the water flow direction, and specifically, the wastewater in the pre-treatment tank 1 flows into the ozone catalytic oxidation tank 2, the wastewater in the ozone catalytic oxidation tank 2 flows into the hydrolysis acidification tank 3, the wastewater in the hydrolysis acidification tank 3 flows into the integrated biological reaction tank 4, the wastewater in the integrated biological reaction tank 4 flows into the sedimentation tank 5, the supernatant in the sedimentation tank 5 flows into the fiber rotating disc filter tank 6, and the wastewater in the fiber rotating disc filter tank 6 flows into the activated coke adsorption tank 7.

[0037] The working process is as follows:

[0038] S1, the pre-treatment tank 1 is used to collect wastewater and perform conventional pretreatment;

[0039] S2, the wastewater after conventional pretreatment is introduced into the ozone catalytic oxidation tank 2, and under the double catalytic oxidation action of ozone and catalyst, part of the macromolecular organic matter in the water is subjected to ring-opening and chain-breaking, and the toxic and harmful substances in the wastewater are reduced, the removal rate of wastewater CODcr reaches 10% to 20%, and the wastewater treatment liquid with good biodegradability and reduced biological inhibition is obtained, which has a great effect on the stable operation of the subsequent biochemical process;

[0040] S3, the wastewater treatment liquid after the ozone catalytic oxidation tank 2 treatment enters the hydrolysis acidification tank 3, and hydrolysis acidification is performed under anoxic conditions, which further improves the biodegradability of the wastewater, and under the action of anaerobic and facultative bacteria in the hydrolysis and acidification stages, there is a removal efficiency of nearly 10% to 20%, which effectively plays a hydrolysis acidification role, converts the refractory macromolecular substances in the wastewater into small molecules, further degrades and removes the small molecules, and makes them be degraded and utilized by microorganisms, thereby reducing the treatment load of the subsequent treatment unit, and reducing the impact frequency on the integrated biological reaction tank 4, which plays a buffering role on the subsequent biochemical treatment unit;

[0041] S4, the wastewater treatment liquid after the hydrolysis acidification tank 3 treatment enters the integrated biological reaction tank 4, the granular sludge is in the aerobic environment and under the anoxic, anaerobic microenvironment between the different levels in the granular sludge, the pollutants in the wastewater are fully adsorbed, degraded and utilized, the organic matter in the wastewater is gradually degraded into CO2 and H2O, and the ammonia nitrogen in the wastewater is simultaneously converted into nitrate nitrogen and nitrogen, the integrated biological reaction tank is in the SBR operation mode, and the fixed weir water outlet form is adopted, namely in the water inlet stage, the wastewater is sent to the bottom of the reactor to enter, so that the wastewater treated in the previous cycle can be replaced or "pushed out" of the reactor;

[0042] S5, the wastewater treatment liquid after the integrated biological reaction tank 4 treatment enters the sedimentation tank 5, under the dual action of the coagulant and the flocculant, large particle flocs are formed and the active sludge layer is formed, namely the aerobic granular sludge which can quickly settle is cultivated, which is completely different from the slow settling flocculent sludge used in the traditional simultaneous denitrification and phosphorus removal system, due to the special spherical structure, the granular sludge has better impact resistance than the traditional process, good salt resistance, good denitrification and phosphorus removal effect under high salt conditions, while improving the floc settling speed, the sludge and water are further separated under the interception of the active sludge layer, and the effluent water quality is improved, the pilot test shows that the carbon removal, denitrification and phosphorus removal capacity is strong, and the water quality fluctuation has little effect on the stability of the effluent effect, compared with the traditional activated sludge method, the integrated biological tank has obvious advantages in the aspects of land occupation area, energy consumption and cost, and the existence of short-cut nitrification and denitrification reduces the oxygen demand and improves the TN removal efficiency;

[0043] S6, the supernatant after the sedimentation in the sedimentation tank 5 enters the fiber rotating disc filter tank 6, and further removes the suspended solids;

[0044] S7, the wastewater treatment liquid after the fiber rotating disc filter tank 6 treatment enters the activated coke adsorption tank 7, and after the adsorption, regeneration and utilization of part of the organic matter which cannot be biodegraded and part of the escaped suspended solids, further removes the chroma and CODcr, and finally realizes the water quality guarantee, the activated coke adsorption tank 7 is upward flow, the wastewater enters the water distributor at the bottom of the adsorption tank, uniformly distributes water, and then passes through the entire coke layer upwards, meanwhile, the system is provided with coke discharging, coke washing, coke supplementing and regeneration systems, and automatically discharges, washes and supplements the coke according to the inlet and outlet water quality, so that the activated coke layer with large adsorption capacity is always located at the top end of the adsorption tank, and the effluent water quality is guaranteed, compared with other technologies, the activated coke adsorption technology is the most economical and effective low-carbon, pollution-free and sustainable water treatment technology, has the advantages of low investment, small occupation area, high reuse rate and good effluent water quality, has great advantages in decolorization and CODcr removal in deep treatment of medicine and chemical industry, and is less affected by temperature, inlet water quality and water quantity fluctuation, and has strong impact resistance.

[0045] Example 2

[0046] AsFigure 1 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0047] The hydraulic retention time in ozone catalytic oxidation tank 2 is 0.5h to 2h, for example, 1h. The ozone dosage ratio M(O3):M(COD) in ozone catalytic oxidation tank 2 is (1.0 to 1.5):1.

[0048] Furthermore, the hydraulic retention time in the hydrolysis acidification tank 3 is 8h to 12h, for example, 10h. An alkalinity replenishment device is provided on one side of the hydrolysis acidification tank 3.

[0049] The hydraulic retention time in the integrated biological reactor 4 is 32h to 40h, for example, 36h; the total sludge load is 0.036kgBOD5 / (kgMLSS·d) to 0.042kgBOD5 / (kgMLSS·d), for example, 0.039kgBOD5 / (kgMLSS·d); the effective water depth in the integrated biological reactor 4 is 10.5m; and the mixed liquor suspended solids concentration in the integrated biological reactor 4 is ≥8000mg / L.

[0050] The integrated bioreactor 4 uses a static fixed overflow weir instead of the mobile and maintenance-intensive decanter commonly used in traditional SBR systems. The integrated bioreactor 4 preferably adopts a high-efficiency integrated bioreactor, which can achieve high biomass concentration and high sludge settling velocity, significantly reducing the required floor space.

[0051] The surface loading of sedimentation tank 5 is 10m³. 3 / (m 2 ·h)~15m 3 / (m 2 •h), the sludge return ratio is 3% to 5%, for example, 4% is selected, and the sedimentation tank 5 is preferably a high-efficiency sedimentation tank.

[0052] The filtration velocity of the activated carbon adsorption tank is 3m. 3 / (m 2 ·h)~5m 3 / (m 2 ·h), for example, choosing 4m 3 / (m 2 •h), the hydraulic retention time is 3h to 4h, for example, if 3.4h is selected, the activated coke recycling rate in the activated coke adsorption tank reaches more than 90%.

[0053] Application examples

[0054] The pilot test was carried out in a sewage treatment plant in a biological medicine development zone. The effluent from the primary sedimentation tank was used as the water source, and the ozone dosage was 70 mg / L. The treatment effect and design operation parameters of "ozone catalytic oxidation + high-efficiency biological reaction" were verified.

[0055] 1. Removal of CODcr

[0056] The comparison of the CODcr removal rates of the process combination of "ozone catalytic oxidation tank + integrated biological reaction tank" and the existing system is as follows:

[0057] Table 1 COD removal rate table of combined process

[0058]

[0059] During the test period, the average removal rate of the existing biochemical system for CODcr was 51.11%, and the average removal rate of the process combination of "ozone catalytic oxidation tank + integrated biological reaction tank" for CODcr reached 70.51%, of which the removal rate of the ozone catalytic oxidation tank was 30.77%.

[0060] The influence of ozone catalytic oxidation on the CODcr removal rate of the integrated biological reaction tank is as follows:

[0061] Table 2 CODcr removal rate table of integrated biological reaction tank before and after the operation of ozone catalytic oxidation tank

[0062]

[0063]

[0064] During the initial operation of the integrated biological reaction tank pilot plant, the ozone catalytic oxidation tank was not operated, and the effluent from the primary sedimentation tank was directly used as the water source, with an average removal rate of 66.02%, which was higher than the removal rate of 51.11% of the existing biochemical system. After the ozone catalytic oxidation tank was shut down, the water source of the integrated biological reaction tank was changed back to the effluent from the primary sedimentation tank, and the removal rate of CODcr was 71.12%, which was higher than the removal rate of CODcr when the ozone catalytic oxidation tank was operated, and also higher than the removal rate when the integrated biological reaction tank was initially operated with the effluent from the primary sedimentation tank as the water source. This indicates that after about two months of domestication, the microorganisms in the integrated biological reaction tank have stronger adaptability and enhanced ability to decompose difficult-to-degrade CODcr in sewage.

[0065] 2. Removal of ammonia nitrogen

[0066] The comparison of the ammonia nitrogen removal rates of the process combination of "ozone catalytic oxidation tank + integrated biological reaction tank" and the existing system is as follows:

[0067] Table 3 Ammonia nitrogen removal rate table of combined process

[0068]

[0069] The ozone catalytic oxidation pool has a certain function of removing ammonia nitrogen due to its strong oxidation after treating wastewater, and the ammonia nitrogen removal rate reaches 18.52%.

[0070] After the ozone catalytic oxidation pool treatment, the nitrification inhibition in the wastewater is obviously reduced, the ammonia nitrogen removal rate of the subsequent integrated biological reaction pool reaches 74.29%, and the combined removal rate of the ozone catalytic oxidation pool and the integrated biological reaction pool reaches 64.07%.

[0071] The influence of ozone catalytic oxidation on the ammonia nitrogen removal rate of the integrated biological reaction pool is as follows:

[0072] Table 4 Ammonia nitrogen removal rate table of integrated biological reaction pool before and after ozone catalytic oxidation pool is put into operation

[0073]

[0074]

[0075] As can be seen from the above table, before the ozone catalytic oxidation pool is put into operation, the ammonia nitrogen removal rate of the integrated biological reaction pool is only 25.38%, and after the operation, the ammonia nitrogen removal rate is significantly improved, reaching 74.29%.

[0076] After the ozone catalytic oxidation pool is put into operation for 2 months, when the operation of the ozone catalytic oxidation pool is stopped, the integrated biological reaction pool still shows a relatively stable ammonia nitrogen removal effect, and the removal rate still reaches 79.47%, which is even better than the performance during the operation of the ozone catalytic oxidation pool. It is analyzed that the integrated biological reaction pool has strong biological selection ability, and through survival of the fittest, microorganisms with high tolerance to nitrification inhibition substances can be continuously screened and domesticated.

[0077] 3. TN removal

[0078] The comparison of the TN removal rate of the "ozone catalytic oxidation pool + integrated biological reaction pool" process combination and the existing system is as follows:

[0079] Table 5 TN removal rate table of combined process

[0080]

[0081] The TN removal rate of the existing biochemical system is only 0.87%, the TN removal rate of the ozone catalytic oxidation pool can reach 19.75%, the integrated biological reaction pool removes nitrogen from the wastewater after ozone catalytic oxidation, and the removal rate can reach 34.57%, and the combined denitrification rate of the ozone catalytic oxidation pool and the integrated biological reaction pool can reach 41.97%.

[0082] The effect of ozone catalytic oxidation on TN removal rate of the integrated biological reaction tank is as shown in the following table:

[0083] Table 6 TN removal rate of the integrated biological reaction tank before and after ozone catalytic oxidation

[0084]

[0085] As shown in the above table, the TN removal efficiency of the ozone catalytic oxidation tank before and after operation is 36.71% and 36.16% respectively, which is basically consistent, indicating that the ozone catalytic oxidation tank has no obvious effect on the integrated biological reaction tank.

[0086] 4. TP removal

[0087] The comparison of the TP removal rate of the process combination of "ozone catalytic oxidation + integrated biological reaction tank" and the existing system is as follows:

[0088] Table 7 TP removal rate of the combined process

[0089]

[0090] During the test period, the average TP removal rate of the existing system was 8.91%; the combined process of ozone catalytic oxidation tank and integrated biological reaction tank had a TP removal rate of 88.57%, and the treatment effect of the existing biochemical system on TP was unstable, while the integrated biological reaction tank showed a high removal efficiency for TP and good stability.

[0091] 5. Sludge data and analysis

[0092] Table 8 Sludge data statistics

[0093]

[0094]

[0095] As can be seen from the above table, the change trend of sludge during the test period, the sludge concentration was 8-10 g / L, SV30 and sludge index (SVI) showed a downward trend, SVI gradually decreased from 93 mL / g at the beginning of commissioning and stabilized below 30 mL / g, indicating that the sludge settling performance was continuously improved and the settling speed was continuously accelerated.

[0096] From the comparison and analysis of the above pilot test data:

[0097] The main process route of "ozone catalytic oxidation tank + hydrolysis acidification tank + integrated biological reaction tank + sedimentation tank + fiber rotating disc filter tank + activated coke adsorption tank" is feasible, and the treatment of pharmaceutical park wastewater is efficient, low-carbon and sustainable.

[0098] Ozone catalytic oxidation has a significant effect on removing pollutants from pharmaceutical wastewater, significantly reduces nitrification inhibition in wastewater, degrades toxic and harmful substances, and ensures the efficient and stable operation of the downstream "hydrolysis acidification + integrated biological reactor". Considering the pretreatment effect of ozone catalytic oxidation, the pressure of subsequent biological denitrification and alkalinity consumption, from the perspective of reducing engineering investment and reducing actual operating costs, an M(O3):M(COD) addition ratio of 1 to 1.5:1 is more appropriate.

[0099] Hydrolysis acidification tanks, as a conventional wastewater treatment process, are characterized by maturity, high efficiency, and stability. They can convert recalcitrant macromolecules in pharmaceutical wastewater into smaller molecules, which can then be degraded and utilized by microorganisms.

[0100] The integrated bioreactor possesses a superior selection mechanism for granular sludge, ensuring that the granular sludge within the bioreactor exhibits better sludge stability and adaptability to wastewater compared to existing systems. This is the fundamental reason and prerequisite for its superior treatment effect compared to existing biochemical systems. Pilot-scale tests have demonstrated that the sludge index in the integrated bioreactor is significantly lower than that of existing A... 2 The / O system features rapid sludge settling and a rich biological community. After acclimatization, it exhibits good resistance to biological inhibition, indicating that with appropriate pretreatment measures, this wastewater is suitable for treatment using a highly efficient biological reactor with good results. Furthermore, the integrated biological reactor offers advantages such as small footprint, low energy consumption, and low operating costs, bringing new breakthroughs and sustainability to the treatment of wastewater in pharmaceutical industrial parks.

[0101] The "sedimentation tank + fiber disc filter" is now widely used in the advanced treatment process of sewage treatment plants. It plays a key role in the removal of TP and SS in wastewater and also provides a guarantee for the stable operation of the subsequent activated coke adsorption tank.

[0102] Activated coke adsorption tanks can effectively remove residual antibiotics, hormones, polycyclic aromatic hydrocarbons, phenols and cresols, heterocyclic compounds, surfactants, and other substances from wastewater in pharmaceutical industrial parks. At the same time, they can further remove color and CODcr from the wastewater, providing an efficient and stable guarantee for the quality of the effluent.

[0103] Activated coke adsorption tanks also have the characteristics of strong resistance to water quality and quantity fluctuations, high adsorption efficiency for low-concentration pollutants, are not classified as hazardous products, have high safety and reliability, are easy to operate, and have low operating costs. They are a low-carbon, pollution-free, and sustainable water treatment technology that can be widely used in the deep treatment of wastewater in pharmaceutical industrial parks.

[0104] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A low-carbon, efficient and sustainable medical park wastewater treatment device, characterized in that, It comprises: a pretreatment tank (1), wastewater in the pretreatment tank (1) flows into an ozone catalytic oxidation tank (2), wastewater in the ozone catalytic oxidation tank (2) flows into a hydrolytic acidification tank (3), wastewater in the hydrolytic acidification tank (3) flows into an integrated biological reaction tank (4), wastewater in the integrated biological reaction tank (4) flows into a sedimentation tank (5), supernatant in the sedimentation tank (5) flows into a fiber rotating disc filter tank (6), and wastewater in the fiber rotating disc filter tank (6) flows into an activated coke adsorption tank (7).

2. The device for low-carbon, efficient and sustainable treatment of wastewater from a medical park according to claim 1, characterized in that, An alkalinity supplementing device is arranged on one side of the hydrolytic acidification tank (3).

3. The device for low-carbon, efficient and sustainable treatment of wastewater from a medical park according to claim 1, characterized in that, A static fixed overflow weir is arranged in the integrated biological reaction tank (4).

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