Bulk pharmaceutical wastewater treatment system

Abstract

The utility model relates to a raw material pharmaceutical wastewater treatment system which comprises a sedimentation tank, a pH regulating tank, an air stripping tower, a chemical sedimentation tank and an anaerobic baffle plate reaction tank which are communicated in sequence, the pH regulating tank is used for regulating the pH and removing ammonia nitrogen in a water body from wastewater in the form of NH3 in a manner that air continuously flows in the air stripping tower, and the chemical sedimentation tank is used for treating the wastewater in the form of NH3; a liquid inlet is formed in the upper part of the air stripping tower, an air inlet is formed in the lower part of the air stripping tower, and the liquid inlet is communicated with the pH regulating tank. Suspended matters are removed through the sedimentation tank, the pH is adjusted to about 10.5 through the pH adjusting tank, organic matters such as SDBS, alcohols, ethyl lactate, triethanolamine, acetic acid, ethanol and CTAB react with ammonia nitrogen in wastewater, air entering the interior from an air inlet in the lower part is in countercurrent contact with wastewater entering the interior from a liquid inlet in the upper part, free ammonia is removed, and the wastewater is recycled. The pH value of the wastewater can be adjusted to about 9.0 through the chemical sedimentation tank under the action of the pH regulator, inorganic magnesium salt and phosphate react with ammonia nitrogen in the wastewater under the pH condition to generate magnesium ammonium phosphate precipitate, and organic matters are degraded through the anaerobic baffle plate reaction tank.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to a system for treating bulk pharmaceutical wastewater. Background Art

[0002] Active Pharmaceutical Ingredients (APIs) are substances or combinations of substances used in finished pharmaceutical products to provide pharmacological activity, or to diagnose, treat, alleviate, or prevent disease, or to restore, correct, or improve human physiological functions. APIs are substances such as powders, crystals, and extracts prepared through chemical synthesis, plant extraction, or biotechnology used to manufacture pharmaceutical intermediates or finished pharmaceuticals. APIs are typically added to finished pharmaceutical preparations during the pharmaceutical manufacturing process as pharmaceutical intermediates or active pharmaceutical ingredients. APIs produce pharmacological activity in organisms, impacting the diagnosis, treatment, alleviation, or prevention of disease, and regulating human physiological functions.

[0003] The API production process generates high-concentration wastewater, primarily including: synthesis wastewater: Residues of solvents, catalysts, and other substances used in the API synthesis process remain in the wastewater; washing wastewater: Large amounts of water or organic solvents are used for washing during the API purification process, resulting in wastewater containing high concentrations of organic matter; and equipment cleaning wastewater: The cleaning of production equipment generates wastewater containing high levels of chemicals. These API wastewaters contain large amounts of organic matter, salts, solvents, and other chemicals, with high ammonia nitrogen levels reaching 43,000-46,000 mg / L and high dichromate oxygen demand (CODcr) levels reaching 39,000-41,000 mg / L. Due to the extremely high ammonia content in API wastewater, biological treatment methods cannot be used directly. If directly mixed with low-concentration wastewater, the ammonia nitrogen concentration in the mixed water would reach approximately 8,900 mg / L, making direct treatment in a biochemical system impractical. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a bulk drug pharmaceutical wastewater treatment system to effectively treat bulk drug pharmaceutical wastewater.

[0005] To achieve the above objectives, the solution of this application is as follows:

[0006] The utility model provides a bulk drug pharmaceutical wastewater treatment system, characterized in that the bulk drug pharmaceutical wastewater treatment system comprises a sedimentation tank, a pH adjustment tank, a stripping tower, a chemical precipitation tank and an anaerobic baffled reactor (ABR tank) which are connected in sequence, the pH adjustment tank is provided with a feed inlet, the pH adjustment tank is used to adjust the pH and remove ammonia nitrogen in the water body from the wastewater in the form of NH3 through the uninterrupted flow of air in the stripping tower, the chemical precipitation tank is provided with a feed inlet, the feed inlet is used as a passage for a pH regulator, an inorganic magnesium salt and a phosphate to enter the chemical precipitation tank, and the chemical precipitation tank is used as a place for the inorganic magnesium salt and the phosphate to react with the ammonia nitrogen in the wastewater under the pH condition after the pH regulator adjusts the pH.

[0007] The principle of the pharmaceutical wastewater treatment system of the utility model is as follows: by setting a sedimentation tank, a pH adjustment tank, a stripping tower, a chemical sedimentation tank and an anaerobic baffled reactor (ABR tank) connected in sequence, the suspended solids in the wastewater can be preliminarily removed through the sedimentation tank, and a pH regulator and an organic compound are added to the wastewater through the pH adjustment tank connected to the sedimentation tank to adjust the pH of the wastewater to about 10.5, and the ammonia nitrogen in the water body is removed from the wastewater in the form of NH3 through the uninterrupted flow of air in the stripping tower, and air can be sent into the wastewater from the air inlet at the bottom through the stripping tower connected to the pH adjustment tank. In the stripping tower, the air entering from the lower air inlet contacts the wastewater gas-liquid two-phase countercurrent flow entering from the upper liquid inlet, thereby removing free ammonia from the wastewater. The pH of the wastewater can be adjusted to 9.0 under the action of a pH regulator through a chemical precipitation tank connected to the stripping tower. Under this pH condition, the inorganic magnesium salts and phosphates entering the chemical precipitation tank react with the ammonia nitrogen in the wastewater to form ammonium magnesium phosphate precipitate, thereby removing the ammonia nitrogen in the wastewater. The organic matter in the wastewater is degraded by the anaerobic reaction in the anaerobic baffled reactor (ABR tank) connected to the chemical precipitation tank, thereby purifying the water quality.

[0008] Optionally, an air outlet is provided at the top of the stripping tower, and the raw material pharmaceutical wastewater treatment system also includes a reaction tower, which is connected to the air outlet of the stripping tower, and the reaction tower is provided with an acid liquid inlet, and the reaction tower is used as a place for the acid liquid to react with the free ammonia discharged from the air outlet of the stripping tower.

[0009] Specifically, the utility model adds a reaction tower connected to the air outlet of the stripping tower, and can use acid to recover the free ammonia discharged from the air outlet of the stripping tower to react and generate ammonium salt. While reducing pollution, the by-product ammonium salt is obtained, thereby improving economic benefits.

[0010] Optionally, the anaerobic baffled reaction tank is provided with a liquid outlet, and the bulk pharmaceutical wastewater treatment system further comprises an anaerobic-anoxic-aerobic tank (A2 O tank), the anaerobic-anoxic-aerobic tank is connected to the liquid outlet end of the anaerobic baffle reaction tank.

[0011] Specifically, the utility model adds an anaerobic-anoxic-aerobic tank connected to the liquid outlet end of the anaerobic baffle reaction tank, which can reduce the ammonia nitrogen content and phosphorus in the wastewater and reduce the dichromate oxygen demand (CODcr) of the wastewater through the degradation of organic matter by anaerobic bacteria, the removal of nitrate nitrogen by denitrification by denitrifying bacteria, the removal of organic matter and ammonia nitrogen by degradation by aerobic microorganisms, and the removal of phosphorus by polyphosphate bacteria, thereby further purifying the water quality.

[0012] Optionally, the anaerobic-anoxic-aerobic tank is provided with a liquid outlet, and the bulk pharmaceutical wastewater treatment system further comprises a coagulation sedimentation tank, and the coagulation sedimentation tank is connected to the liquid outlet of the anaerobic-anoxic-aerobic tank.

[0013] Specifically, the present invention can use coagulants and / or flocculants to remove impurities such as particles and bacteria that are difficult to precipitate in wastewater, thereby further purifying the water quality by adding a coagulation sedimentation tank connected to the liquid outlet of the anaerobic-anoxic-aerobic tank.

[0014] Optionally, the bulk drug pharmaceutical wastewater treatment system further includes a secondary sedimentation tank, which is located on a connecting pipe between the coagulation sedimentation tank and the anaerobic-anoxic-aerobic tank.

[0015] Specifically, the utility model can separate sludge and wastewater through sedimentation by adding a secondary sedimentation tank located on the connecting pipe between the coagulation sedimentation tank and the anaerobic-anoxic-aerobic tank, thereby further purifying the water quality.

[0016] Optionally, the secondary sedimentation tank is provided with a sludge return port and a discharge port, and the sludge return port is connected to the anaerobic-anoxic-aerobic tank.

[0017] Specifically, the utility model connects the sludge return port of the secondary sedimentation tank to the anaerobic-anoxic-aerobic tank, so that the sludge precipitated in the secondary sedimentation tank can be sent to the anaerobic-anoxic-aerobic tank for further treatment, thereby achieving sludge reduction, stabilization and harmlessness.

[0018] Optionally, the chemical precipitation tank is provided with a sludge outlet, and the bulk pharmaceutical wastewater treatment system further comprises a connected sludge thickening tank and a dehydration mechanism, the sludge thickening tank is provided with a material inlet, and the material inlet of the sludge thickening tank is connected to the sludge outlet of the chemical precipitation tank.

[0019] Specifically, the utility model adds a connected sludge thickening tank and a dewatering mechanism, and connects the material inlet of the sludge thickening tank to the sludge outlet of the chemical precipitation tank. The sludge discharged from the chemical precipitation tank can be sent to the sludge thickening tank for concentration treatment, and then the sludge is removed from the sludge through the dewatering mechanism to reduce the volume of the sludge for easy transportation.

[0020] Optionally, the discharge port of the secondary sedimentation tank is connected to the material inlet of the sludge thickening tank.

[0021] Specifically, the utility model connects the discharge port of the secondary sedimentation tank to the material inlet of the sludge thickening tank, so that the sludge discharged from the secondary sedimentation tank can be sent to the sludge thickening tank for concentration treatment, and then the sludge is treated by a dehydration mechanism to remove moisture from the sludge, thereby reducing the volume of the sludge for easy transportation.

[0022] Optionally, the coagulation sedimentation tank is provided with a discharge port, and the discharge port of the coagulation sedimentation tank is connected to the material inlet of the sludge thickening tank.

[0023] Specifically, the utility model connects the discharge port of the coagulation sedimentation tank to the material inlet of the sludge thickening tank, so that the sludge discharged from the coagulation sedimentation tank can be sent to the sludge thickening tank for concentration treatment, and then the sludge is removed from the water through the dehydration mechanism to reduce the volume of the sludge for easy transportation.

[0024] Optionally, the dehydration mechanism adopts a filter press.

[0025] Optionally, a high-pressure pump is provided on the connecting pipe between the material inlet of the sludge thickening tank and the sludge outlet of the chemical precipitation tank and / or a high-pressure pump is provided on the connecting pipe between the discharge port of the secondary sedimentation tank and the material inlet of the sludge thickening tank and / or a high-pressure pump is provided on the connecting pipe between the discharge port of the coagulation sedimentation tank and the material inlet of the sludge thickening tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of the bulk pharmaceutical wastewater treatment system of Example 1;

[0028] Figure 2 This is a schematic structural diagram of the bulk pharmaceutical wastewater treatment system of Example 2;

[0029] Figure 3 This is a schematic structural diagram of the bulk pharmaceutical wastewater treatment system of Example 3;

[0030] Figure 4 This is a schematic structural diagram of the bulk pharmaceutical wastewater treatment system of Example 4;

[0031] Figure 5 This is a schematic structural diagram of the bulk pharmaceutical wastewater treatment system of Example 5;

[0032] Figure 6 This is a schematic structural diagram of the bulk pharmaceutical wastewater treatment system of Example 6.

[0033] Reference numerals

[0034] 1- Sedimentation tank;

[0035] 2-pH adjustment tank;

[0036] 3- stripping tower;

[0037] 4-Chemical sedimentation tank;

[0038] 5- anaerobic baffle reaction tank;

[0039] 6-reaction tower;

[0040] 7-Anaerobic-anoxic-aerobic tank;

[0041] 8-coagulation sedimentation tank;

[0042] 9-Secondary sedimentation tank;

[0043] 10-Sludge thickening tank;

[0044] 11-Dehydration mechanism. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, outside, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0048] In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that satisfies both A and B. Furthermore, the technical solutions of the various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] One embodiment of the present invention provides a system for treating pharmaceutical wastewater from bulk drugs, comprising a sedimentation tank 1, a pH regulating tank 2, a stripping tower 3, a chemical precipitation tank 4 and an anaerobic baffled reactor (ABR) tank 5 which are connected in sequence. The pH regulating tank 2 is provided with a feed port, which is used to regulate the pH and remove ammonia nitrogen in the water body from the wastewater in the form of NH3 through the uninterrupted flow of air in the stripping tower 3. The chemical precipitation tank 4 is provided with a feed port and a sludge outlet, the feed port is used as a passage for a pH regulator, an inorganic magnesium salt and a phosphate to enter the chemical precipitation tank 4, the chemical precipitation tank 4 is used as a place for the inorganic magnesium salt and the phosphate to react with the ammonia nitrogen in the wastewater under the pH condition after the pH regulator is adjusted. The anaerobic baffled reactor 5 is provided with a liquid outlet.

[0050] In another embodiment of the present invention, the bulk pharmaceutical wastewater treatment system further includes a reaction tower 6, which is connected to the air outlet of the stripping tower 3. The reaction tower 6 is provided with an acid liquid inlet. The reaction tower 6 is used as a place for the acid liquid to react with the free ammonia discharged from the air outlet of the stripping tower 3.

[0051] In another embodiment of the present invention, the bulk pharmaceutical wastewater treatment system further comprises an anaerobic-anoxic-aerobic tank (A 2 O pool) 7, the anaerobic-anoxic-aerobic pool 7 is connected to the liquid outlet end of the anaerobic baffle reaction pool 5, and the anaerobic-anoxic-aerobic pool 7 is provided with a liquid outlet.

[0052] In another embodiment of the present invention, the bulk pharmaceutical wastewater treatment system further includes a coagulation sedimentation tank 8 , which is connected to the liquid outlet of the anaerobic-anoxic-aerobic tank 7 and is provided with a discharge port.

[0053] In another embodiment of the present invention, the bulk pharmaceutical wastewater treatment system further includes a secondary sedimentation tank 9, which is located on the connecting pipe between the coagulation sedimentation tank 8 and the anaerobic-anoxic-aerobic tank 7, and is provided with a sludge return port and a discharge port.

[0054] In another embodiment of the present invention, the sludge return port of the secondary sedimentation tank 9 is connected to the anaerobic-anoxic-aerobic tank 7 .

[0055] In another embodiment of the present invention, the bulk pharmaceutical wastewater treatment system further includes a connected sludge thickening tank 10 and a dehydration mechanism 11. The sludge thickening tank 10 is provided with a material inlet, and the material inlet of the sludge thickening tank 10 is connected to the sludge outlet of the chemical precipitation tank 4. The dehydration mechanism 11 adopts a filter press.

[0056] In another embodiment of the present invention, the discharge port of the secondary sedimentation tank 9 is connected to the material inlet of the sludge thickening tank 10 .

[0057] In another embodiment of the present invention, the discharge port of the coagulation sedimentation tank 8 is connected to the material inlet of the sludge thickening tank 10 .

[0058] A high-pressure pump is provided on the connecting pipe between the material inlet of the sludge thickening tank 10 and the sludge outlet of the chemical precipitation tank 4 and / or a high-pressure pump is provided on the connecting pipe between the discharge port of the secondary sedimentation tank 9 and the material inlet of the sludge thickening tank 10 and / or a high-pressure pump is provided on the connecting pipe between the discharge port of the coagulation sedimentation tank 8 and the material inlet of the sludge thickening tank 10.

[0059] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention; however, it is apparent to those skilled in the art that the embodiments of the present invention can be practiced without these specific details.

[0060] Example 1

[0061] See also Figure 1 , Figure 1 This is a structural schematic diagram of the raw material pharmaceutical wastewater treatment system of this embodiment, which is used to treat the wastewater generated in the raw material pharmaceutical manufacturing process. The raw material pharmaceutical wastewater treatment system includes a sedimentation tank 1, a pH adjustment tank 2, a stripping tower 3, a chemical precipitation tank 4 and an anaerobic baffled reactor tank (ABR tank) 5 connected in sequence.

[0062] Please continue reading Figure 1 The sedimentation tank 1 is used to remove suspended matter such as suspended particles with a density greater than that of water from the water by gravity. The sedimentation tank is provided with an inlet and an outlet, and the inlet is used as a passage for the wastewater to be treated to enter the sedimentation tank 1.

[0063] Please continue reading Figure 1 The pH adjustment tank 2 is used as a place to adjust the pH of the wastewater to about 10.5, so that the air can flow continuously in the stripping tower 3 during the subsequent treatment process, so that the ammonia nitrogen in the water body can be removed from the wastewater in the form of NH3. The pH adjustment tank 2 is provided with a liquid inlet, a liquid outlet and a feed port. The liquid inlet of the pH adjustment tank 2 is connected to the water outlet of the sedimentation tank 1, and the feed port of the pH adjustment tank 2 is used as a passage for the pH adjuster (such as sodium hydroxide and other substances) and ammonia nitrogen to enter the interior of the pH adjustment tank 2.

[0064] Please continue reading Figure 1 The stripping tower 3 is used as a place to remove free ammonia in the wastewater. Inside the stripping tower 3, the air entering from the bottom and the wastewater gas-liquid two-phase entering from the top are in countercurrent contact, thereby removing the free ammonia from the wastewater. A wastewater inlet is provided at the top of the stripping tower 3, an air inlet and a water outlet are provided at the bottom of the stripping tower 3, and an air outlet is provided at the top of the stripping tower 3. The wastewater inlet of the stripping tower 3 is connected to the liquid outlet end of the pH adjustment tank 2.

[0065] Please continue reading Figure 1 The chemical precipitation tank 4 is used as a place for the ammonia nitrogen in the wastewater after being treated by the stripping tower 3 to react with the inorganic magnesium salt and phosphate to form ammonium magnesium phosphate precipitate, thereby removing the ammonia nitrogen in the wastewater. The chemical precipitation tank 4 is provided with a liquid inlet, a feed inlet, a liquid outlet and a sludge return port. The liquid inlet of the chemical precipitation tank 4 is connected to the water outlet of the stripping tower 3. The feed inlet is used as a passage for the inorganic magnesium salt, phosphate and pH adjuster (such as inorganic acid) to enter the interior of the chemical precipitation tank 4. The pH adjuster is used to adjust the wastewater after being treated by the stripping tower 3 to about 9.0.

[0066] Please continue reading Figure 1 The anaerobic baffled reactor (ABR tank) 5 is used as a place to degrade organic matter in the wastewater through anaerobic reaction. The anaerobic baffled reactor (ABR tank) 5 has a liquid inlet and a liquid outlet. The liquid inlet of the anaerobic baffled reactor (ABR tank) 5 is connected to the liquid outlet of the chemical precipitation tank 4.

[0067] The principle of the bulk drug pharmaceutical wastewater treatment system of this embodiment is as follows: by setting a sedimentation tank 1, a pH adjustment tank 2, a stripping tower 3, a chemical precipitation tank 4 and an anaerobic baffled reactor (ABR) tank 5 connected in sequence, the sedimentation tank 1 can be used to preliminarily remove suspended solids in the wastewater, and alkaline substances such as sodium hydroxide are added to the wastewater through the pH adjustment tank 2 connected to the sedimentation tank 1 to adjust the pH of the wastewater to about 10.5, and the uninterrupted flow of air in the stripping tower 3 removes ammonia nitrogen in the water from the wastewater in the form of NH3, and the air can be sent into the stripping tower 3 from the air inlet at the bottom through the stripping tower 3 connected to the pH adjustment tank 2. The air entering the interior from the lower air inlet contacts the wastewater gas-liquid two-phase countercurrent flow entering the interior from the upper liquid inlet, thereby removing free ammonia from the wastewater. Through the chemical precipitation tank 4 connected to the stripping tower 3, inorganic acid, inorganic magnesium salt and phosphate can enter the chemical precipitation tank 4, and the pH of the wastewater is adjusted to about 9.0 under the action of pH regulators such as inorganic acid. Under this pH condition, the inorganic magnesium salt and phosphate react with the ammonia nitrogen in the wastewater to form ammonium magnesium phosphate precipitate, thereby removing the ammonia nitrogen in the wastewater, and degrading the organic matter in the wastewater through the anaerobic reaction in the anaerobic baffle reactor (ABR tank) 5 connected to the chemical precipitation tank 4, thereby purifying the water quality.

[0068] Example 2

[0069] See also Figure 2 , Figure 2 This is a schematic structural diagram of the bulk drug pharmaceutical wastewater treatment system of this embodiment.

[0070] Please continue reading Figure 2 The difference between this embodiment and embodiment 1 is that: it also includes a reaction tower 6, which is used as a reaction tower for reacting acid with free ammonia discharged from the air outlet of the stripping tower 4 to generate ammonium salt. The reaction tower 6 is provided with an air inlet and a liquid inlet. The air inlet of the reaction tower 6 is connected to the air outlet of the stripping tower 4, and the liquid inlet of the reaction tower 6 is used as a passage for substances such as acid to enter the interior of the reaction tower 6.

[0071] Specifically, this embodiment adds a reaction tower 6 connected to the gas outlet of the stripping tower 4, and can use acid to recover the free ammonia discharged from the gas outlet of the stripping tower 4 to react and generate ammonium salt. While reducing pollution, by-product ammonium salt is obtained, thereby improving economic benefits.

[0072] Example 3

[0073] See also Figure 3 , Figure 3 This is a structural diagram of the bulk drug pharmaceutical wastewater treatment system of this embodiment.

[0074] Please continue reading Figure 3The difference between this embodiment and embodiment 2 is that it also includes an anaerobic-anoxic-aerobic tank (A 2 The anaerobic-anoxic-aerobic tank 7 is used to further purify the water by reducing the ammonia nitrogen content and phosphorus in the wastewater through anaerobic degradation of organic matter, denitrification by denitrifying bacteria to remove nitrate nitrogen, degradation by aerobic microorganisms to remove organic matter and ammonia nitrogen, and phosphorus removal by phosphate-accumulating bacteria. The tank also reduces the dichromate oxygen demand (CODcr) in the wastewater. The anaerobic-anoxic-aerobic tank 7 is provided with a liquid inlet and a liquid outlet. The liquid inlet of the anaerobic-anoxic-aerobic tank 7 is connected to the liquid outlet of the anaerobic baffle reaction tank 5.

[0075] Specifically, this embodiment adds an anaerobic-anoxic-aerobic tank (A) connected to the liquid outlet of the anaerobic baffle reaction tank 5. 2 O pool) 7, can reduce the ammonia nitrogen content and phosphorus in the wastewater and reduce the dichromate oxygen demand (CODcr) of the wastewater through the degradation of organic matter by anaerobic bacteria, the removal of nitrate nitrogen by denitrification by denitrifying bacteria, the removal of organic matter and ammonia nitrogen by degradation by aerobic microorganisms, and the removal of phosphorus by polyphosphate bacteria, thereby further purifying the water quality.

[0076] Example 4

[0077] See also Figure 4 , Figure 4 This is a structural diagram of the bulk drug pharmaceutical wastewater treatment system of this embodiment.

[0078] Please continue reading Figure 4 This embodiment differs from Example 3 in that it also includes a coagulation sedimentation tank 8, which is used to remove impurities such as particles and bacteria that are difficult to settle in the wastewater using a coagulant and / or flocculant, thereby further purifying the water quality. The coagulation sedimentation tank 8 is provided with an inlet, an outlet, and a discharge port. The inlet of the coagulation sedimentation tank 8 is connected to the outlet of the anaerobic-anoxic-aerobic tank 7.

[0079] Specifically, this embodiment adds a coagulation sedimentation tank 8 connected to the liquid outlet of the anaerobic-anoxic-aerobic tank 7, which can use coagulants and / or flocculants to remove impurities such as particles and bacteria that are difficult to precipitate in the wastewater, thereby further purifying the water quality.

[0080] Example 5

[0081] See also Figure 5 , Figure 5 This is a structural diagram of the bulk drug pharmaceutical wastewater treatment system of this embodiment.

[0082] Please continue reading Figure 5The difference between this embodiment and embodiment 4 is that: it also includes a secondary sedimentation tank 9, which is located on the connecting pipe between the coagulation sedimentation tank 8 and the anaerobic-anoxic-aerobic tank 7. The secondary sedimentation tank 9 is provided with a sludge return port and a discharge port. The sludge return port of the secondary sedimentation tank 9 is connected to the liquid inlet of the anaerobic-anoxic-aerobic tank 7.

[0083] Specifically, this embodiment adds a secondary sedimentation tank 9 located on the connecting pipe between the coagulation sedimentation tank 8 and the anaerobic-anoxic-aerobic tank 7. This allows for the separation of sludge from wastewater through sedimentation, thereby further purifying the water quality. By connecting the sludge return port of the secondary sedimentation tank 9 to the anaerobic-anoxic-aerobic tank 7, the sludge precipitated in the secondary sedimentation tank 9 can be transferred to the anaerobic-anoxic-aerobic tank for further treatment, thereby achieving sludge reduction, stabilization, and harmlessness.

[0084] Example 6

[0085] See also Figure 6 , Figure 6 This is a structural diagram of the bulk drug pharmaceutical wastewater treatment system of this embodiment.

[0086] Please continue reading Figure 6 The difference between this embodiment and embodiment 5 is that: it also includes a connected sludge thickening tank 10 and a dewatering mechanism 11, the sludge thickening tank 10 is provided with a material inlet, the material inlet of the sludge thickening tank 10 is connected to the sludge outlet of the chemical precipitation tank 4 and / or the discharge port of the secondary sedimentation tank 9 and / or the discharge port of the coagulation sedimentation tank 8, and a high-pressure pump (not shown) is provided on the connecting pipe between the material inlet of the sludge thickening tank 10 and the sludge outlet of the chemical precipitation tank 4 and / or the discharge port of the secondary sedimentation tank 9 and / or the discharge port of the coagulation sedimentation tank 8, and the water mechanism 11 adopts a filter press.

[0087] Specifically, the utility model adds a connected sludge thickening tank 10 and a dewatering mechanism 11, and connects the material inlet of the sludge thickening tank 10 to the sludge outlet of the chemical precipitation tank 4 and / or the discharge port of the secondary sedimentation tank 9 and / or the discharge port of the coagulation sedimentation tank 8. The sludge discharged from the chemical precipitation tank 4 and / or the secondary sedimentation tank 9 and / or the coagulation sedimentation tank 8 can be sent to the sludge thickening tank 10 for concentration treatment, and then the sludge is removed from the sludge through the dewatering mechanism 11 to reduce the volume of the sludge for easy transportation.

[0088] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed herein shall be covered by the claims of the present invention.

Claims

1. A bulk pharmaceutical wastewater treatment system, characterized in that: The bulk drug pharmaceutical wastewater treatment system includes a sedimentation tank, a pH adjustment tank, a stripping tower, a chemical precipitation tank and an anaerobic baffle reaction tank connected in sequence, wherein the upper portion of the stripping tower is provided with a liquid inlet, and the pH adjustment tank is provided with a feed inlet. The pH adjustment tank is used to adjust the pH and remove ammonia nitrogen in the water body from the wastewater in the form of NH3 through the uninterrupted flow of air in the stripping tower. The lower portion of the stripping tower is provided with an air inlet, and the liquid inlet is connected to the pH adjustment tank. The chemical precipitation tank is provided with a feed inlet, and the feed inlet is used as a passage for a pH adjuster, an inorganic magnesium salt and a phosphate to enter the chemical precipitation tank. The chemical precipitation tank is used as a place for the inorganic magnesium salt and the phosphate to react with the ammonia nitrogen in the wastewater under the pH condition adjusted by the pH adjuster.

2. The bulk drug pharmaceutical wastewater treatment system according to claim 1, characterized in that: The anaerobic baffled reaction tank is provided with a liquid outlet, and the bulk pharmaceutical wastewater treatment system further comprises an anaerobic-anoxic-aerobic tank, and the anaerobic-anoxic-aerobic tank is connected to the liquid outlet of the anaerobic baffled reaction tank; And / or, an air outlet is provided at the top of the stripping tower, and the raw material pharmaceutical wastewater treatment system also includes a reaction tower, the reaction tower is connected to the air outlet of the stripping tower, the reaction tower is provided with an acid liquid inlet, and the reaction tower is used as a place for the acid liquid to react with the free ammonia discharged from the air outlet of the stripping tower.

3. The bulk pharmaceutical wastewater treatment system according to claim 2, characterized in that: The anaerobic-anoxic-aerobic tank is provided with a liquid outlet, and the bulk pharmaceutical wastewater treatment system further comprises a coagulation sedimentation tank, which is connected to the liquid outlet of the anaerobic-anoxic-aerobic tank.

4. The bulk drug pharmaceutical wastewater treatment system according to claim 3, characterized in that: The bulk drug pharmaceutical wastewater treatment system further comprises a secondary sedimentation tank, which is located on a connecting pipe between the coagulation sedimentation tank and the anaerobic-anoxic-aerobic tank.

5. The bulk drug pharmaceutical wastewater treatment system according to claim 4, characterized in that: The secondary sedimentation tank is provided with a sludge return port, and the sludge return port is connected to the anaerobic-anoxic-aerobic tank.

6. The bulk drug pharmaceutical wastewater treatment system according to claim 5, characterized in that: The chemical precipitation tank is provided with a sludge outlet and a discharge port. The bulk pharmaceutical wastewater treatment system further comprises a connected sludge thickening tank and a dehydration mechanism. The sludge thickening tank is provided with a material inlet, and the material inlet of the sludge thickening tank is connected to the sludge outlet of the chemical precipitation tank.

7. The bulk drug pharmaceutical wastewater treatment system according to claim 6, characterized in that: The sludge return port of the secondary sedimentation tank is connected to the material inlet of the sludge concentration tank.

8. The bulk pharmaceutical wastewater treatment system according to claim 6, characterized in that: The coagulation sedimentation tank is provided with a discharge port, and the discharge port of the coagulation sedimentation tank is connected to the material inlet of the sludge thickening tank.

9. The bulk drug pharmaceutical wastewater treatment system according to claim 6, characterized in that: The dehydration mechanism adopts a filter press.

10. The bulk pharmaceutical wastewater treatment system according to any one of claims 6 to 9, characterized in that: A high-pressure pump is provided on the connecting pipe between the material inlet of the sludge thickening tank and the sludge outlet of the chemical precipitation tank and / or a high-pressure pump is provided on the connecting pipe between the discharge port of the secondary sedimentation tank and the material inlet of the sludge thickening tank and / or a high-pressure pump is provided on the connecting pipe between the discharge port of the coagulation sedimentation tank and the material inlet of the sludge thickening tank.

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