Pharmaceutical wastewater treatment system

Abstract

The utility model discloses a pharmaceutical wastewater treatment system and relates to the technical field of pharmaceutical wastewater treatment. The device comprises a degradation-resistant pretreatment system, a sulfur-containing wastewater pretreatment system, a comprehensive wastewater pretreatment system and an anaerobic reactor system. Wastewater in different workshops is classified and treated, the wastewater is divided into refractory wastewater, sulfur-containing wastewater and comprehensive wastewater according to the properties of the wastewater, the refractory wastewater has biotoxicity or cannot be biodegraded, and the sulfur-containing wastewater cannot be biodegraded due to the effect of inhibiting anaerobic reaction, so that the comprehensive wastewater cannot be biodegraded. By emphatically controlling the treatment effect and the treatment capacity of refractory wastewater and sulfur-containing wastewater, the target of stably reaching the standard for a long time is achieved, and the method is applied to the field of pharmaceutical wastewater treatment, especially pharmaceutical wastewater with complex and changeable incoming water and high treatment difficulty. The device has the advantages of strong pertinence, good water outlet effect, stable system operation, strong impact resistance, high treatment efficiency, low operation cost, simple operation, strong applicability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of pharmaceutical wastewater treatment, and in particular relates to a pharmaceutical wastewater treatment system. Background Art

[0002] The production process of medicines is complex, requiring many types of raw materials and complex chemical structures. A large number of toxic and harmful substances are also produced during the production process. The types of wastewater pollutants produced by different enterprises and different production processes are different, resulting in pharmaceutical wastewater with high pollutant concentration, complex composition, high microbial toxicity, large changes in water quality and quantity, and difficulty in degradation. If it is not treated or does not meet the discharge standards after treatment, it will cause serious pollution. Therefore, it is extremely important to treat pharmaceutical wastewater up to standard.

[0003] At present, the pharmaceutical wastewater treatment field mainly adopts physical and chemical treatment, biochemical treatment and a combination of multiple methods. The traditional pharmaceutical wastewater treatment process mainly has the following problems. The current pharmaceutical wastewater treatment system cannot treat difficult-to-degrade wastewater. After entering the system, this type of wastewater leads to microbial poisoning, large-scale death of activated sludge, and paralysis of the biochemical system. In addition, the water quality and quantity of the incoming water vary greatly, the C and N ratio varies greatly, and the COD concentration fluctuates between 3000-12000 mg / L. The system has poor stability, insufficient impact resistance, high treatment cost, high dosage, high power consumption, and high labor costs. In summer, the water temperature in the biochemical pool is high, which inhibits the activity of microorganisms, the treatment capacity is insufficient, and the risk of exceeding the standard is extremely high.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a pharmaceutical wastewater treatment system to overcome the above technical problems existing in the existing related technology.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a pharmaceutical wastewater treatment system, comprising a difficult-to-degrade pretreatment system, a sulfur-containing wastewater pretreatment system, a comprehensive wastewater pretreatment system, an anaerobic reactor system, a two-stage biochemical system and a deep treatment system, wherein the difficult-to-degrade pretreatment system is connected to the anaerobic reactor system, the sulfur-containing wastewater pretreatment system is connected to the two-stage biochemical system, the comprehensive wastewater pretreatment system is connected to the anaerobic reactor system, the anaerobic reactor system is connected to the two-stage biochemical system, and the two-stage biochemical system is connected to the deep treatment system.

[0008] Furthermore, the refractory wastewater pretreatment system comprises a regulating tank 1, a hydrolysis acidification tank 1, a sedimentation tank 1, a micro-electrolyzer, a Fenton tank, a coagulation tank and a sedimentation tank. The regulating tank 1 comprises its own tank body and a mixer M1, a liquid level gauge L1, and a lifting pump 1. The regulating tank is provided with an inlet pipe and an overflow pipe. The sedimentation tank is a vertical flow sedimentation tank, and a sludge pump 3 is provided at the bottom of the sedimentation tank.

[0009] The hydrolysis acidification tank 1 includes its own tank body and a stirrer M2, the sedimentation tank 1 includes its own tank body and a reflux pump 2, and a three-way reflux pipe 2 is arranged outside the reflux pump 2, wherein the main pipe is connected to the hydrolysis acidification tank 1;

[0010] Among them, the micro-electrolyzer includes a micro-electrolyzer body 201, an iron-carbon filler 202, a pH meter PH1 and a supporting layer 203. The micro-electrolyzer body 201 is provided with a water inlet pipe, the water inlet pipe is provided with an HCL addition point, the micro-electrolyzer body 201 is provided with a defoaming agent addition point, the bottom of the micro-electrolyzer body 201 is provided with an air stirring tube, the top of the micro-electrolyzer body 201 is provided with a water outlet weir 204, the micro-electrolyzer body 201 is a cylindrical device, the top of the micro-electrolyzer body 201 is provided with a feeding port 205, the middle of the outer surface of the micro-electrolyzer body 201 is provided with an observation hole 206, and the bottom of the micro-electrolyzer body 201 is provided with a water distribution device 207 and an air distribution device 208.

[0011] Furthermore, the Fenton tank includes a Fenton tank body, a mixer M3, and a pH meter PH2. A water inlet pipe is provided on the coagulation tank body, and H2O2 and HCL addition points are provided on the water inlet pipe. A defoamer addition point is provided in the Fenton tank. The coagulation tank includes a coagulation tank body, mixers M4, M5, and a pH meter PH3. A NaOH addition point is provided on the water inlet pipe. A PAM addition point is provided in the coagulation tank body. The sedimentation tank consists of a sedimentation tank body and a sludge pump three.

[0012] Furthermore, the sulfur-containing wastewater pretreatment system includes a regulating tank 2, a hydrolysis acidification tank 2, and a sedimentation tank 2. The regulating tank 2 includes its own tank body and a mixer M6, a liquid level meter L2, and a lifting pump 4. The tank body itself is provided with a water pipe and an overflow pipe;

[0013] The hydrolysis acidification tank 2 includes its own tank body and a stirrer M7, the sedimentation tank 2 includes its own tank body and a reflux pump 5, the reflux pump 5 is provided with a three-way reflux pipe 5, and the main line of the three-way reflux pipe 5 is connected to the hydrolysis acidification tank 2.

[0014] Further, the comprehensive wastewater pretreatment system includes a regulating tank three, a hydrolysis acidification tank three and a sedimentation tank three, the regulating tank three includes a regulating tank body and a mixer M8, a liquid level meter L3 and a lifting pump six, the regulating tank body is provided with a water pipe and an overflow pipe, the hydrolysis acidification tank three includes its own tank body and a mixer M9, the sedimentation tank three includes its own tank body and a reflux pump seven, and the lifting pump six is ​​provided with a three-way reflux pipe six;

[0015] Wherein, the main line on the three-way reflux pipe six is ​​connected with the hydrolysis acidification tank in three phases.

[0016] Furthermore, the anaerobic reactor system includes an anaerobic water inlet tank and an anaerobic reactor. The anaerobic water inlet tank includes its own tank body and a pH meter PH5, a liquid level meter L4 and a lift pump 10. The anaerobic water inlet tank is provided with a water pipe and an overflow pipe. The tank body itself is provided with HCL and NaOH addition points. The anaerobic reactor includes an anaerobic reactor tank body 301 and a pH meter PH4, a three-phase separator 302, a water distribution system 303 and a circulating pump 304. A steam-water separation tank 305 is provided on the top of the anaerobic reactor tank body 301, and a second water outlet weir 306 is provided on the top of the inside of the anaerobic reactor tank body 301.

[0017] Furthermore, the two-stage biochemical system includes a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank and a secondary aerobic tank. The two-stage biochemical system includes the tank body itself and dissolved oxygen DO1, DO2, DO3, DO1, OPR1, ORP2, stirring M10, mixer M11, digestion reflux pump seven and reflux pump eight. The primary aerobic tank and the secondary aerobic tank are both provided with an aeration system, the secondary aerobic tank is provided with an outlet channel and a water distribution channel, and the front ends of the primary anoxic tank and the secondary anoxic tank are provided with a carbon source addition point.

[0018] Further, the deep treatment system includes a secondary sedimentation tank, a sludge pump station, an intermediate water tank, a deep coagulation tank, a tertiary sedimentation tank, a denitrification deep bed filter and a backwashing water tank. The secondary sedimentation tank, the sludge pump station and the intermediate water tank each include their own tank body and a sludge scraper M12, a sludge return pump 1, a liquid level meter L5 and a lift pump 12. The sludge return pump 1 is provided with a three-way return pipe, and the main line on the three-way return pipe is connected to the primary anoxic tank;

[0019] The deep coagulation tank and three sedimentation tanks each include a tank body, a mixer M13, a mixer M14 and a sludge pump fourteen; the deep coagulation tank is provided with a dephosphorization agent and a PAM dosing point; the denitrification deep bed filter and backwash water tank each include a tank body, a liquid level meter L6, a filter filler, an air distribution system and a backwash water pump thirteen; the tank body itself is provided with a water inlet pipe, and a carbon source addition point is added to the water inlet pipe.

[0020] The utility model has the following beneficial effects:

[0021] 1. The utility model classifies the wastewater from different workshops and divides them into difficult-to-degrade wastewater, sulfur-containing wastewater and comprehensive wastewater according to their properties. The difficult-to-degrade wastewater has biological toxicity or cannot be biodegraded, while the sulfur-containing wastewater inhibits the anaerobic reaction effect. By focusing on controlling the treatment effect and treatment volume of the difficult-to-degrade wastewater and the sulfur-containing wastewater, the goal of long-term stable compliance is achieved. The utility model is applied to the field of pharmaceutical wastewater treatment, especially pharmaceutical wastewater with complex and changeable water supply and great difficulty in treatment. It has the advantages of strong pertinence, good effluent effect, stable system operation, strong impact resistance, high treatment efficiency, low operating cost, simple operation and strong applicability.

[0022] 2. For difficult-to-degrade wastewater, we use micro-electrolysis technology for treatment. This process has multiple advantages, including low operating and maintenance costs, significant treatment effects, wide application range, significant microbial detoxification effects, and can effectively improve the biodegradability of wastewater. After treatment with this technology, 40%-60% of COD in raw water can be removed, achieving significant reduction of pollutants.

[0023] 3. For the difficult-to-degrade wastewater, we use Fenton technology for treatment. This technology can effectively remove small molecules that are difficult to degrade, such as acetonitrile, triethylamine, etc., which cannot be treated by micro-electrolysis technology. The application of Fenton technology makes up for the shortcomings of micro-electrolysis treatment and provides a new solution to solve such wastewater problems. Furthermore, when micro-electrolysis technology is combined with Fenton technology, the effect is even more significant. This combination can not only perfectly solve the problem of difficult-to-degrade wastewater, but also greatly improve the COD removal rate to 60%-80%.

[0024] 4. The utility model adopts a two-stage biochemical technology, namely, AO+AO technology to treat wastewater. This method first removes high-concentration incoming water in stages, thereby improving the impact resistance of the system. At the same time, it also takes into account denitrification and phosphorus removal, ensuring that the effluent water quality is more stable and reliable. In addition, the technology itself has a flexible denitrification mechanism and realizes two-stage denitrification, making the total nitrogen removal of the system more controllable. A fixed contact oxidation filler is installed in the biochemical pool to form a bioreactor in which activated sludge and biofilm work together, further improving the removal efficiency of COD, ammonia nitrogen and total nitrogen. By adopting this method, wastewater can be effectively treated, effluent quality can be guaranteed, and operational stability can be ensured.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the utility model embodiments, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the process flow of the utility model;

[0028] Figure 2 This is a schematic diagram of the internal structure of the micro-electrolysis cell of the utility model;

[0029] Figure 3 This is a schematic diagram of the main structure of the anaerobic reactor tank of the utility model;

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 201. Micro-electrolysis cell body; 202. Iron-carbon filler; 203. Support layer; 204. Water outlet weir; 205. Feeding port; 206. Observation hole; 207. Water distribution device; 208. Gas distribution device; 301. Anaerobic reactor tank body; 302. Three-phase separator; 303. Water distribution system; 304. Circulation pump; 305. Gas-water separation tank; 306. Second water outlet weir. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] See also Figure 1-Figure 3As shown, the utility model is a pharmaceutical wastewater treatment system, including a difficult-to-degrade pretreatment system, a sulfur-containing wastewater pretreatment system, a comprehensive wastewater pretreatment system, an anaerobic reactor system, a two-stage biochemical system and a deep treatment system, wherein the difficult-to-degrade pretreatment system is connected to the anaerobic reactor system, the sulfur-containing wastewater pretreatment system is connected to the two-stage biochemical system, the comprehensive wastewater pretreatment system is connected to the anaerobic reactor system, the anaerobic reactor system is connected to the two-stage biochemical system, and the two-stage biochemical system is connected to the deep treatment system.

[0035] The difficult-to-degrade wastewater pretreatment system, sulfur-containing wastewater pretreatment system and comprehensive wastewater pretreatment system are pretreatment systems for three types of wastewater with different characteristics: difficult-to-degrade wastewater, sulfur-containing wastewater and comprehensive wastewater. The difficult-to-degrade wastewater mainly refers to wastewater that is difficult to biodegrade, has biological toxicity, and is rich in heterocyclics, benzene rings, triethylamines and nitriles, which need to be detoxified and decomposed into easily degradable organic matter; sulfur-containing wastewater mainly refers to wastewater with a high sulfur concentration; for comprehensive wastewater with high pollutant concentration, complex composition, and large changes in incoming water, the difficult-to-degrade wastewater pretreatment system applies two advanced oxidation technologies, micro-electrolysis and Fenton, and has a unique reactor structure.

[0036] The utility model classifies the wastewater from different workshops for treatment, and divides them into difficult-to-degrade wastewater, sulfur-containing wastewater and comprehensive wastewater according to their properties. The difficult-to-degrade wastewater has biological toxicity or cannot be biodegraded, while the sulfur-containing wastewater inhibits anaerobic reaction. By focusing on controlling the treatment effect and treatment volume of the difficult-to-degrade wastewater and the sulfur-containing wastewater, the goal of long-term stable compliance is achieved. The utility model is applied to the field of pharmaceutical wastewater treatment, especially pharmaceutical wastewater with complex and changeable incoming water and great difficulty in treatment. The utility model has the advantages of strong pertinence, good effluent effect, stable system operation, strong impact resistance, high treatment efficiency, low operating cost, simple operation, strong applicability, etc.

[0037] In one embodiment, the refractory wastewater pretreatment system includes a regulating tank 1, a hydrolysis acidification tank 1, a sedimentation tank 1, a micro-electrolyzer, a Fenton tank, a coagulation tank and a sedimentation tank, wherein the regulating tank 1 includes its own tank body and a mixer M1, a liquid level meter L1, and a lifting pump 1. The regulating tank is provided with a water pipe and an overflow pipe, the sedimentation tank is a vertical flow sedimentation tank, and a sludge pump 3 is provided at the bottom of the sedimentation tank;

[0038] The hydrolysis acidification tank 1 includes its own tank body and a stirrer M2, the sedimentation tank 1 includes its own tank body and a reflux pump 2, and a three-way reflux pipe 2 is arranged outside the reflux pump 2, wherein the main pipe is connected to the hydrolysis acidification tank 1;

[0039] Among them, the micro-electrolyzer includes a micro-electrolyzer body 201, an iron-carbon filler 202, a pH meter PH1 and a supporting layer 203. The micro-electrolyzer body 201 is provided with a water inlet pipe, the water inlet pipe is provided with an HCL addition point, the micro-electrolyzer body 201 is provided with a defoaming agent addition point, the bottom of the micro-electrolyzer body 201 is provided with an air stirring tube, the top of the micro-electrolyzer body 201 is provided with a water outlet weir 204, the micro-electrolyzer body 201 is a cylindrical device, the top of the micro-electrolyzer body 201 is provided with a feeding port 205, the middle of the outer surface of the micro-electrolyzer body 201 is provided with an observation hole 206, and the bottom of the micro-electrolyzer body 201 is provided with a water distribution device 207 and an air distribution device 208.

[0040] The difficult-to-degrade wastewater first enters the regulating tank 1. The wastewater is quickly mixed under the stirring of the mixer M1. When the liquid level gauge L1 reaches a certain water level, the lifting pump 1 is started to pump the wastewater into the hydrolysis acidification tank 1. When L1 is lower than a certain water level, the lifting pump 1 is stopped. When the liquid level in the regulating tank 1 is too high, the wastewater overflows to the accident tank through the overflow pipe. After the wastewater enters the hydrolysis acidification tank 1, the anaerobic activated sludge in the tank is quickly mixed with the wastewater and maintained in a uniform suspension state under the stirring of the mixer M2. It enters the sedimentation tank 1 under the action of gravity flow. Under the action of gravity sedimentation, the supernatant flows to the inside of the micro-electrolysis cell 201. The inside of the micro-electrolysis cell 201 is designed for corrosion resistance, and the sludge at the bottom of the sedimentation tank is pumped back to the hydrolysis acidification tank 1 through the reflux pump 2 main line. The secondary pipeline is the residual sludge discharge pipe to ensure that the anaerobic activated sludge will not be lost. The excess The sludge is discharged into the desludging system, and the wastewater enters from the bottom of the micro-electrolysis cell body 201 and fully reacts with the iron-carbon filler 202 under air stirring. If a large amount of foam is generated, a defoamer is added, and the amount of HCL added is controlled by the pH meter PH1. The reacted wastewater flows into the Fenton tank from the top, and an outlet weir 204 is set at the top of the micro-electrolysis cell body 201. The effluent after the reaction flows out from the top of the outlet weir 204. An HCL dosing point is set on the water inlet pipe on the micro-electrolysis cell body 201, and the addition of hydrochloric acid is controlled by the pH meter PH1 installed on the micro-electrolysis cell body 201 to ensure that the pH in the micro-electrolysis cell body 201 is around 3.

[0041] For difficult-to-degrade wastewater, micro-electrolysis technology is used for treatment. This process has multiple advantages, including low operating and maintenance costs, significant treatment effects, a wide range of applications, and significant microbial detoxification effects. It can also effectively improve the biodegradability of wastewater. After treatment with this technology, 40%-60% of the COD in the raw water can be removed, achieving significant reductions in pollutants.

[0042] In one embodiment, for the above-mentioned Fenton tank, the Fenton tank includes a Fenton tank body, a mixer M3, and a pH meter PH2. A water inlet pipe is provided on the coagulation tank body, and H2O2 and HCL addition points are provided on the water inlet pipe. A defoaming agent addition point is provided in the Fenton tank. The coagulation tank includes a coagulation tank body, mixers M4, M5, and a pH meter PH3. A NaOH addition point is provided on the water inlet pipe. A PAM addition point is provided in the coagulation tank body. The sedimentation tank consists of a sedimentation tank body and a sludge pump three.

[0043] Wastewater enters from the bottom of the Fenton tank, HCL and H2O2 are added to the water inlet pipe and react quickly under the action of the mixer M3. If a large amount of foam is generated, a defoamer is added and the HCL dosage is controlled by PH2 to control the PH at about 4. Due to the consumption of the iron-carbon filler 202, the wastewater will bring in enough ferrous iron, so there is no need to supplement ferrous iron. The reacted wastewater flows into the coagulation tank from the top. The wastewater enters the coagulation tank from the top, and the addition of NaOH is controlled by PH3. Under the action of mixers M4 and M5, the neutral wastewater is fully mixed with PAM to form large flocs, and flows into the sedimentation tank by gravity. In the sedimentation tank, the sludge and water are separated by gravity, and the clean water flows into the anaerobic inlet tank from the top, while the sludge deposited at the bottom is discharged to the desludging system through the sludge pump.

[0044] For difficult-to-degrade wastewater, the Fenton technology is used for treatment, which can effectively remove small molecule difficult-to-degrade organic matter that cannot be treated by micro-electrolysis technology, such as acetonitrile, triethylamine, etc. The application of Fenton technology makes up for the shortcomings of micro-electrolysis treatment and provides a new solution to solve such wastewater problems. Furthermore, when micro-electrolysis technology is combined with Fenton technology, the effect is even more significant. This combination can not only perfectly solve the problem of difficult-to-degrade wastewater, but also greatly improve the COD removal rate to 60%-80%.

[0045] In one embodiment, for the above-mentioned sulfur-containing wastewater pretreatment system, the sulfur-containing wastewater pretreatment system includes a regulating tank 2, a hydrolysis acidification tank 2, and a sedimentation tank 2. The regulating tank 2 includes its own tank body and a mixer M6, a liquid level meter L2 and a lifting pump 4. The tank body itself is provided with a water pipe and an overflow pipe;

[0046] The hydrolysis acidification tank 2 includes its own tank body and a stirrer M7, the sedimentation tank 2 includes its own tank body and a reflux pump 5, the reflux pump 5 is provided with a three-way reflux pipe 5, and the main line of the three-way reflux pipe 5 is connected to the hydrolysis acidification tank 2.

[0047] Similarly, sulfur-containing wastewater and comprehensive wastewater first enter the equalization tank 2, and are pumped into the hydrolysis acidification tank 2 through the four main pipelines of the lifting pump under the control of the liquid level meter. The secondary pipeline is the residual sludge discharge pipe, and mud and water separation is carried out in the sedimentation tank 2. The comprehensive wastewater flows into the anaerobic inlet tank by gravity, and the sulfur-containing wastewater enters the primary anoxic tank.

[0048] In one embodiment, for the above-mentioned comprehensive wastewater pretreatment system, the comprehensive wastewater pretreatment system includes a regulating tank three, a hydrolysis acidification tank three and a sedimentation tank three, the regulating tank three includes a regulating tank body and a mixer M8, a liquid level meter L3 and a lifting pump six, the regulating tank body is provided with a water pipe and an overflow pipe, the hydrolysis acidification tank three includes its own tank body and a mixer M9, the sedimentation tank three includes its own tank body and a reflux pump seven, and the lifting pump six is ​​provided with a three-way reflux pipe six;

[0049] Among them, the main line on the three-way reflux pipe six is ​​connected to the three phases of the hydrolysis acidification tank, and the secondary pipeline is the residual sludge discharge pipe.

[0050] Similarly, sulfur-containing wastewater and comprehensive wastewater first enter the regulating tank three, and are pumped into the hydrolysis acidification tank three through the main line on the three-way return pipe six on the lifting pump six under the control of the liquid level meter L3, and mud and water separation is carried out in the sedimentation tank three. The second pipeline is the residual sludge discharge pipe, in which the comprehensive wastewater flows into the anaerobic inlet tank by gravity, and the sulfur-containing wastewater enters the primary anoxic tank.

[0051] In one embodiment, for the above-mentioned anaerobic reaction system, the anaerobic reactor system includes an anaerobic water inlet tank and an anaerobic reactor. The anaerobic water inlet tank includes its own tank body and a pH meter PH5, a liquid level meter L4 and a lift pump 10. The anaerobic water inlet tank is provided with a water pipe and an overflow pipe, and the tank body itself is provided with HCL and NaOH addition points. The anaerobic reactor includes an anaerobic reactor tank body 301 and a pH meter PH4, a three-phase separator 302, a water distribution system 303 and a circulating pump 304. The top of the anaerobic reactor tank body 301 is provided with a steam-water separation tank 305, and the top of the inside of the anaerobic reactor tank body 301 is provided with a second water outlet weir 306.

[0052] The refractory wastewater and the comprehensive wastewater are mixed in the anaerobic inlet tank, and the addition of HCL and NaOH is controlled by PH5 to ensure that the pH value of the anaerobic inlet tank is in a normal state. The liquid level meter L4 controls the pump 10 to pump the wastewater into the anaerobic reactor. In the anaerobic reactor tank body 301, the wastewater is decomposed and fermented by anaerobic sludge. Under the action of the three-phase separator 302, the sludge is precipitated, and the biogas enters the biogas power generation system after dehumidification through the gas-water separation tank 305, and the effluent flows into the two-stage biochemical system through the second effluent weir 306.

[0053] The sulfur-containing wastewater is separated so that it does not enter the anaerobic reactor, thereby reducing the inhibitory effect of sulfide in the wastewater on the anaerobic reactor and increasing the COD removal effect of the anaerobic reactor by more than 1.3 times.

[0054] In one embodiment, for the above-mentioned two-stage biochemical system, the two-stage biochemical system includes a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank and a secondary aerobic tank. The two-stage biochemical system includes a tank body itself and dissolved oxygen DO1, DO2, DO3, DO1, OPR1, ORP2, stirring M10, mixer M11, digestion reflux pump seven and reflux pump eight. Aeration systems are provided inside the primary aerobic tank and the secondary aerobic tank, and a water outlet channel and a water distribution channel are provided inside the secondary aerobic tank. Carbon source addition points are provided at the front ends of the primary anoxic tank and the secondary anoxic tank.

[0055] In the two-stage biochemical system, wastewater enters the primary anoxic tank, the primary aerobic tank, the secondary anoxic tank and the secondary aerobic tank in turn. The primary biochemical tank can treat wastewater with higher COD concentration and can cope with shock loads. Under the action of aeration, the activated sludge removes COD and ammonia nitrogen indicators in the wastewater in the aerobic tank. Under the action of digestion reflux pump seven and reflux pump eight, the digestate is returned to the anoxic tank and the total nitrogen indicator in the wastewater is removed under the plug flow action of mixer M10 and mixer M11. The effluent flows into the secondary sedimentation tank through the water distribution channel.

[0056] A two-stage biochemical technology, namely AO+AO technology, is used to treat wastewater. This method first removes high-concentration incoming water in stages, which improves the impact resistance of the system. At the same time, it also takes into account denitrification and phosphorus removal, ensuring that the effluent quality is more stable and reliable. In addition, the technology itself has a flexible denitrification mechanism and realizes two-stage denitrification, making the total nitrogen removal of the system more controllable. Fixed contact oxidation fillers are installed in the biochemical pool to form a bioreactor in which activated sludge and biofilm work together, further improving the removal efficiency of COD, ammonia nitrogen and total nitrogen. By adopting this method, wastewater can be effectively treated, effluent quality can be guaranteed, and operational stability can be ensured.

[0057] In one embodiment, for the above-mentioned deep treatment system, the deep treatment system includes a secondary sedimentation tank, a sludge pump station, an intermediate water tank, a deep coagulation tank, a tertiary sedimentation tank, a denitrification deep bed filter and a backwashing water tank. The secondary sedimentation tank, the sludge pump station and the intermediate water tank all include their own tank body and a sludge scraper M12, a sludge return pump 1, a liquid level meter L5 and a lift pump 12. The sludge return pump 1 is provided with a three-way return pipe, and the main line on the three-way return pipe is connected to the primary anoxic tank;

[0058] The deep coagulation tank and three sedimentation tanks each include a tank body, a mixer M13, a mixer M14 and a sludge pump fourteen; the deep coagulation tank is provided with a dephosphorization agent and a PAM dosing point; the denitrification deep bed filter and backwash water tank each include a tank body, a liquid level meter L6, a filter filler, an air distribution system and a backwash water pump thirteen; the tank body itself is provided with a water inlet pipe, and a carbon source addition point is added to the water inlet pipe.

[0059] The activated sludge and wastewater enter the secondary sedimentation tank together, and the mud and water are separated under the action of gravity, and the sludge is stirred by the scraper M12 to prevent the sludge from agglomerating at the bottom. The supernatant water enters the intermediate water tank and is pumped into the deep coagulation tank through the lifting pump 12. The sludge enters the sludge pump station from the bottom and flows back to the two-stage biochemical system through the pump 11. The excess sludge is discharged to the desludging system. The lifting pump 12 is controlled by the liquid level meter L5. The wastewater that is not treated in time overflows to the accident pool. After the water enters the deep coagulation sedimentation tank, phosphorus removal agent and PAM are added and mixed in the mixer M 13 and the mixer M14 react with the inorganic phosphorus and colloidal organic matter in the wastewater to form flocs, and separate the mud and water by gravity in the three sedimentation tanks. The supernatant enters the denitrification deep bed filter by gravity. After the wastewater enters the denitrification deep bed filter, it gradually forms a biofilm on the filter filler, and the microorganisms therein use the carbon source supplemented in the water to carry out denitrification, and finally further remove the total nitrogen in the wastewater, and enter the backwashing pool through its own filtering action. When the backwashing wastewater pool is full, it flows out from the top and meets the discharge standards. When the denitrification deep bed filter is blocked, it needs to be backwashed. The filter is cleaned by air flushing and the flushing water of pump 13. The generated wastewater flows out from the top and is discharged into the factory sewage network.

[0060] By adopting deep treatment, namely coagulation and sedimentation technology, and using chemical phosphorus removal to make up for the lack of phosphorus in biochemical treatment, it is possible to ensure that the total phosphorus index is stably met. The second deep treatment, namely denitrification deep bed filter technology, is adopted. On the one hand, the denitrification capacity is further consolidated to cope with the large fluctuations in the total nitrogen in the incoming water and ensure that the total nitrogen index is stably met. On the other hand, its own filtering effect can keep the suspended solids index in the effluent stable and meet the standard.

[0061] To sum up, with the help of the above-mentioned technical scheme of the utility model, by adopting the combined treatment of hydrolysis acidification, micro-electrolysis, Fenton, anaerobic reactor, two-stage biochemical, coagulation sedimentation, and denitrification deep bed filter, the COD index in the wastewater can be treated layer by layer, and finally the effluent COD is guaranteed to meet the standard. Compared with the prior art, the utility model not only has a special treatment process for difficult-to-degrade wastewater and sulfur-containing wastewater, but also has a variety of combined processes for COD, total nitrogen and total phosphorus indicators. It ensures that all wastewater treatment indicators meet the standards, and at the same time gives the entire system a very redundant impact resistance. Even if the influent COD, total nitrogen and total phosphorus fluctuate by more than 2 times, the system can ensure that the effluent is stable and meets the standards, which completely solves the problem of treating difficult-to-degrade wastewater in pharmaceutical factories, adapts to the normal state of imbalance in the C / N ratio of incoming water, and relieves the pressure of frequent fluctuations in the quality and quantity of incoming water. In addition, the use of a dedicated microporous aerator greatly improves the aeration efficiency. At the same time, the biodegradability of the wastewater is greatly improved, which greatly reduces the gas-water ratio of the existing system, reduces the electricity cost per ton of water treatment by about 20%, and reduces the cost of adding carbon source agents by about 30% under the combined nitrogen removal effect of the two-stage biochemical system and deep denitrification treatment. At the same time, the excellent phosphorus removal effect of the system reduces the cost of adding phosphorus removal agents by about 40%. The entire operation center realizes the functions of one-time start, stop, automatic dosing, automatic backwashing, automatic rotation of equipment, automatic reporting, etc. The self-control ability is greatly improved, which saves a lot of labor costs for the factory manager.

[0062] Through the above technical scheme, 1. By classifying and treating the wastewater from different workshops, and dividing it into difficult-to-degrade wastewater, sulfur-containing wastewater and comprehensive wastewater according to its properties, difficult-to-degrade wastewater is biotoxic or cannot be biodegraded, and sulfur-containing wastewater inhibits anaerobic reaction. By focusing on controlling the treatment effect and treatment volume of difficult-to-degrade wastewater and sulfur-containing wastewater, the goal of long-term stable compliance can be achieved. It is applied to the field of pharmaceutical wastewater treatment, especially pharmaceutical wastewater with complex and changeable water supply and difficult treatment. It has the advantages of strong pertinence, good effluent effect, stable system operation, strong impact resistance, high treatment efficiency, low operating cost, simple operation and strong applicability; 2. 2. Use two-stage biochemical technology, namely AO+AO technology, to treat wastewater. This method first removes high-concentration incoming water in stages, which improves the impact resistance of the system. At the same time, it also takes into account denitrification and phosphorus removal, ensuring that the effluent quality is more stable and reliable. In addition, the technology itself has a flexible denitrification mechanism and realizes two-stage denitrification, making the system's total nitrogen removal more controllable. Fixed contact oxidation fillers are installed in the biochemical pool to form a bioreactor in which activated sludge and biofilm work together, further improving the removal efficiency of COD, ammonia nitrogen, and total nitrogen. By adopting this method, wastewater can be effectively treated, effluent quality can be guaranteed, and operational stability can be ensured.

[0063] According to the project data of specific implementation, the pharmaceutical wastewater treatment technology of the utility model (using the above process route at the same time) and the prior art of the background technology are used to compare the wastewater treatment, and the situation is as follows:

[0064]

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pharmaceutical wastewater treatment system, comprising a difficult-to-degrade pretreatment system, a sulfur-containing wastewater pretreatment system, a comprehensive wastewater pretreatment system, an anaerobic reactor system, a two-stage biochemical system and a deep treatment system, characterized in that: The difficult-to-degrade pretreatment system is connected to the anaerobic reactor system, the sulfur-containing wastewater pretreatment system is connected to the two-stage biochemical system, the comprehensive wastewater pretreatment system is connected to the anaerobic reactor system, the anaerobic reactor system is connected to the two-stage biochemical system, and the two-stage biochemical system is connected to the deep treatment system.

2. A pharmaceutical wastewater treatment system according to claim 1, characterized in that: The difficult-to-degrade pretreatment system comprises a regulating tank 1, a hydrolysis acidification tank 1, a sedimentation tank 1, a micro-electrolyzer, a Fenton tank, a coagulation tank and a sedimentation tank. The regulating tank 1 comprises its own tank body and a stirrer M1, a liquid level gauge L1, and a lifting pump 1. The regulating tank is provided with a water pipe and an overflow pipe. The sedimentation tank is a vertical flow sedimentation tank, and a sludge pump 3 is provided at the bottom of the sedimentation tank. The hydrolysis acidification tank 1 includes its own tank body and a stirrer M2, the sedimentation tank 1 includes its own tank body and a reflux pump 2, and a three-way reflux pipe 2 is arranged outside the reflux pump 2, wherein the main pipe is connected to the hydrolysis acidification tank 1; The micro-electrolyzer comprises a micro-electrolyzer body (201), an iron-carbon filler (202), a pH meter PH1 and a supporting layer (203); a water inlet pipe is provided on the micro-electrolyzer body (201); a HCL dosing point is provided on the water inlet pipe; a defoamer dosing point is provided inside the micro-electrolyzer body (201); an air stirring pipe is provided at the bottom of the micro-electrolyzer body (201); a water outlet weir (204) is provided at the top of the micro-electrolyzer body (201); the micro-electrolyzer body (201) is a cylindrical device; a feeding port (205) is provided at the top of the micro-electrolyzer body (201); an observation hole (206) is provided in the middle of the outer surface of the micro-electrolyzer body (201); and a water distribution device (207) and an air distribution device (208) are provided at the bottom of the micro-electrolyzer body (201).

3. A pharmaceutical wastewater treatment system according to claim 2, characterized in that: The Fenton tank includes a Fenton tank body, a mixer M3, and a pH meter PH2. A water inlet pipe is provided on the coagulation tank body, and H2O2 and HCL addition points are provided on the water inlet pipe. A defoamer addition point is provided in the Fenton tank. The coagulation tank includes a coagulation tank body, a mixer M4, M5, and a pH meter PH3. A NaOH addition point is provided on the water inlet pipe. A PAM addition point is provided in the coagulation tank body. The sedimentation tank consists of a sedimentation tank body and a sludge pump three.

4. A pharmaceutical wastewater treatment system according to claim 1, characterized in that: The sulfur-containing wastewater pretreatment system includes a regulating tank 2, a hydrolysis acidification tank 2, and a sedimentation tank 2. The regulating tank 2 includes its own tank body and a mixer M6, a liquid level meter L2, and a lifting pump 4. The tank body itself is provided with a water pipe and an overflow pipe; The hydrolysis acidification tank 2 includes its own tank body and a stirrer M7, the sedimentation tank 2 includes its own tank body and a reflux pump 5, the reflux pump 5 is provided with a three-way reflux pipe 5, and the main line of the three-way reflux pipe 5 is connected to the hydrolysis acidification tank 2.

5. A pharmaceutical wastewater treatment system according to claim 1, characterized in that: The comprehensive wastewater pretreatment system includes a regulating tank three, a hydrolysis acidification tank three and a sedimentation tank three. The regulating tank three includes a regulating tank body and a mixer M8, a liquid level meter L3 and a lifting pump six. The regulating tank body is provided with a water pipe and an overflow pipe. The hydrolysis acidification tank three includes its own tank body and a mixer M9. The sedimentation tank three includes its own tank body and a reflux pump seven. The lifting pump six is ​​provided with a three-way reflux pipe six; Wherein, the main line on the three-way reflux pipe six is ​​connected with the hydrolysis acidification tank in three phases.

6. A pharmaceutical wastewater treatment system according to claim 1, characterized in that: The anaerobic reactor system comprises an anaerobic water inlet pool and an anaerobic reactor. The anaerobic water inlet pool comprises a pool body, a pH meter PH5, a liquid level meter L4 and a lift pump 10. The anaerobic water inlet pool is provided with a water pipe and an overflow pipe. The pool body is provided with HCL and NaOH addition points. The anaerobic reactor comprises an anaerobic reactor pool body (301), a pH meter PH4, a three-phase separator (302), a water distribution system (303) and a circulation pump (304). A steam-water separation tank (305) is provided on the top of the anaerobic reactor pool body (301). A second water outlet weir (306) is provided on the top of the anaerobic reactor pool body (301).

7. A pharmaceutical wastewater treatment system according to claim 1, characterized in that: The two-stage biochemical system includes a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank and a secondary aerobic tank. The two-stage biochemical system includes a tank body itself and dissolved oxygen DO1, DO2, DO3, DO1, OPR1, ORP2, stirring M10, a stirrer M11, a digestion reflux pump seven and a reflux pump eight. Aeration systems are arranged inside the primary aerobic tank and the secondary aerobic tank, a water outlet channel and a water distribution channel are arranged inside the secondary aerobic tank, and carbon source addition points are arranged at the front ends of the primary anoxic tank and the secondary anoxic tank.

8. A pharmaceutical wastewater treatment system according to claim 1, characterized in that: The deep treatment system includes a secondary sedimentation tank, a sludge pump station, an intermediate water tank, a deep coagulation tank, a tertiary sedimentation tank, a denitrification deep bed filter and a backwashing water tank. The secondary sedimentation tank, the sludge pump station and the intermediate water tank each include their own tank body and a sludge scraper M12, a sludge return pump 1, a liquid level meter L5 and a lift pump 12. The sludge return pump 1 is provided with a three-way return pipe, and the main line on the three-way return pipe is connected to the primary anoxic tank; The deep coagulation tank and three sedimentation tanks each include a tank body, a mixer M13, a mixer M14 and a sludge pump fourteen; the deep coagulation tank is provided with a dephosphorization agent and a PAM dosing point; the denitrification deep bed filter and backwash water tank each include a tank body, a liquid level meter L6, a filter filler, an air distribution system and a backwash water pump thirteen; the tank body itself is provided with a water inlet pipe, and a carbon source addition point is added to the water inlet pipe.

Images