A treatment device and method for fermentation-based pharmaceutical wastewater

Abstract

This invention provides a treatment device and method for fermentation-based pharmaceutical wastewater. The treatment device includes a pretreatment system, a biochemical treatment system, an advanced treatment system, and a sludge treatment system, which are sequentially connected. The pretreatment system and the biochemical treatment system are respectively connected to the sludge treatment system. The pretreatment system is used to sequentially filter, homogenize, and flocculate the wastewater. The biochemical treatment system is used to degrade organic matter in the wastewater and remove ammonia nitrogen and COD, followed by secondary homogenization and flocculation sedimentation. The advanced treatment system is used to remove recalcitrant biological substances and toxic substances from the wastewater, and then disinfect the wastewater before discharge. The sludge treatment system is used to concentrate and press-filter the generated sludge to form a sludge cake.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a treatment device and method for fermentation-based pharmaceutical wastewater. Background Technology

[0002] Fermentation-based pharmaceutical wastewater is characterized by its complex composition, high organic matter concentration, biotoxicity, poor biodegradability, and significant water quality fluctuations. It is among the most difficult organic wastewaters to treat, and conventional wastewater treatment processes often fail to achieve compliant discharge standards. Currently, most wastewater treatment plants employ pretreatment to alter the structure of organic matter and improve biodegradability before proceeding with subsequent biological treatment to meet discharge standards. However, these methods all have limitations in terms of purification efficiency and treatment costs.

[0003] Therefore, there is an urgent need to find efficient methods for treating fermented pharmaceutical wastewater and to invent a treatment process for fermented pharmaceutical wastewater to solve the problem of the difficulty in degrading pharmaceutical wastewater. Summary of the Invention

[0004] The technical problem to be solved by this invention is: to solve the technical problem of treating fermentation-based pharmaceutical wastewater, a treatment device and method for fermentation-based pharmaceutical wastewater are provided. This treatment device and method can rapidly degrade organic pollutants in fermentation-based pharmaceutical wastewater, can perform deep treatment of biochemically treated wastewater, and can remove pollutants that are difficult to biodegrade, thus solving the problems of low purification efficiency and high treatment cost of fermentation-based pharmaceutical wastewater.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] This invention provides a treatment device for fermentation-based pharmaceutical wastewater. The device includes a pretreatment system, a biochemical treatment system, an advanced treatment system, and a sludge treatment system, which are sequentially connected. The pretreatment system and the biochemical treatment system are respectively connected to the sludge treatment system. The pretreatment system sequentially filters, homogenizes, and flocculates the wastewater, then transports the treated wastewater to the biochemical treatment system, and the generated sludge is also transported to the sludge treatment system. The biochemical treatment system degrades organic matter in the wastewater and removes ammonia nitrogen and COD. After secondary homogenization, the wastewater undergoes flocculation and sedimentation treatment, and the treated wastewater is then transported to the advanced treatment system, and the generated sludge is also transported to the sludge treatment system. The advanced treatment system removes recalcitrant biological substances and toxic substances from the wastewater, then disinfects the wastewater before discharge. The sludge treatment system concentrates and press-filters the generated sludge to form a sludge cake.

[0007] Furthermore, the pretreatment system includes a bar screen, an equalization tank, and a coagulation sedimentation tank connected in sequence; the bar screen is used to filter out floating matter and impurities in the wastewater; the equalization tank is used to equalize the quantity and quality of the wastewater; the coagulation sedimentation tank is used to treat the wastewater through flocculation and sedimentation; the biological treatment system includes a UASB reactor, an intermediate water tank, an A / O tank, and a secondary sedimentation tank connected in sequence; the UASB reactor is used to degrade organic matter in the wastewater; the intermediate water tank is used to further equalize the wastewater; the A / O tank is used to remove ammonia nitrogen and COD from the wastewater; The secondary sedimentation tank is used for further flocculation and sedimentation treatment of wastewater; the advanced treatment system includes a photocatalytic oxidation tank and a contact disinfection tank connected in sequence; the photocatalytic oxidation tank is used to remove recalcitrant biological materials and toxic substances from the wastewater; the contact disinfection tank is used to disinfect the wastewater; the sludge treatment system includes a sludge thickening tank and a belt filter press connected in sequence; the sludge thickening tank is used to thicken the generated sludge; the belt filter press is used to filter the thickened sludge; and the coagulation sedimentation tank, A / O tank, and secondary sedimentation tank are respectively connected to the sludge thickening tank.

[0008] Furthermore, the photocatalytic oxidation tank includes a water channel and a frustum-shaped frame. The water channel has an inlet on its side wall and a variable frequency pump at its top. The frustum-shaped frame is supported above the variable frequency pump. A vertical water inlet pipe leading to the water channel is arranged axially inside the frustum-shaped frame. A top water collection trough is located at the top of the frustum-shaped frame, and a bottom water collection trough is located at the bottom. The bottom water collection trough is connected to an outlet pipe. One end of the vertical water inlet pipe is connected to the outlet of the variable frequency pump, and the other end is connected to the top water collection trough. A photosensitive element is also arranged on the top water collection trough. A spiral photocatalytic corridor is arranged inside the frustum-shaped frame, and a supplementary photocatalytic light source is arranged through the spiral photocatalytic corridor along its axis. The two ends of the spiral photocatalytic corridor are connected to the top water collection trough and the bottom water collection trough, respectively.

[0009] Furthermore, the spiral photocatalytic corridor includes a base plate and baffles vertically arranged on both sides of the base plate. A baffle is also provided on the base plate. The base plate is composed of multiple rectangular segments spliced ​​together and is arranged at a certain angle to the ground. The baffle is composed of multiple rectangular segments of the same size as the base plate. The baffle is provided with a slot to fix the baffle. The baffle is rectangular and is arranged perpendicular to the baffle. The baffle is provided with grooves, and the grooves contain photocatalyst.

[0010] Furthermore, the long side of the baffle plate is slightly lower than the short side of the baffle plate, the short side of the baffle plate is two-thirds the length of the short side of the baffle plate, the long side of the baffle plate is connected to the long side of the base plate, the long side of the baffle plate is connected to the baffle plate, and the baffle plates are staggered on the baffle plate; the photocatalyst is TiO; the base plate, baffle plate and baffle plate are all made of plexiglass.

[0011] Furthermore, the photocatalytic supplementary light source includes a light source support and a light source that is disposed through the light source support; the light source support is composed of multiple plexiglass discs, and each disc of the light source support has a hole in its center with the same diameter as the vertical water inlet pipe to allow the vertical water inlet pipe to pass through; each disc of the light source support has holes around its perimeter with the same diameter as the light source to allow the light source to pass through; the light source is connected to the generator and the photosensitive element respectively through wires.

[0012] Furthermore, the contact disinfection pool and the photocatalytic oxidation pool are separated by a first partition wall. The contact disinfection pool is provided with a second partition wall that divides the pool into a disinfection pool and a water inlet channel. The second partition wall and the side wall of the disinfection pool are respectively provided with a water inlet channel and a water outlet channel. The water outlet channel is equipped with a gate.

[0013] Furthermore, the bar is a mechanical bar; a mixer is installed inside the regulating tank; the coagulation sedimentation tank includes a connected baffle flocculation tank and a vertical flow sedimentation tank, polyaluminum chloride with flocculation effect is added to the baffle flocculation tank, and a sludge discharge valve is provided at the bottom of the vertical flow sedimentation tank, which is connected to the sludge thickening tank through a pipeline.

[0014] Furthermore, a water distribution device is provided at the bottom of the UASB reactor, which is connected to the inlet pipe and has a horizontal radial outlet. A three-phase separator is provided in the upper middle part of the UASB reactor, and a gas collection pipe for collecting biogas is provided inside the UASB reactor.

[0015] This invention also provides a method for treating fermentation-based pharmaceutical wastewater, using the aforementioned treatment apparatus for fermentation-based pharmaceutical wastewater; comprising the following steps:

[0016] ① The wastewater is filtered through a mechanical screen to remove larger floating particles and impurities. The filtered wastewater is then pumped to a regulating tank to homogenize the water quality, ensuring that the quantity and quality of the water are homogenized and stabilized. After homogenization, the wastewater enters a flocculation tank, and the flocculated wastewater enters a vertical flow sedimentation tank for further sedimentation.

[0017] ② The supernatant in the sedimentation tank enters the UASB reactor through a pipeline. After being treated by the UASB reactor, the organic matter in the wastewater is significantly degraded. The treated wastewater then enters the intermediate water tank for homogenization.

[0018] ③ The homogenized wastewater enters the A / O tank for aerobic biological treatment, where ammonia nitrogen and COD in the wastewater are further removed by the degradation effect of microorganisms;

[0019] ④ The supernatant in the aerobic tank enters the secondary sedimentation tank, where the wastewater is further settled through flocculation.

[0020] ⑤ The effluent from the secondary sedimentation tank enters the photocatalytic oxidation tank, where the catalyst TiO2 is added. Due to its strong oxidizing properties, it can generate a large number of hydroxyl radicals. The strong oxidizing effect of hydroxyl radicals is used to effectively remove the recalcitrant biological substances and toxic substances in the wastewater.

[0021] ⑥ Wastewater treated by photocatalytic oxidation is then disinfected before being discharged in compliance with standards.

[0022] The beneficial effects of this invention are as follows: ① The fermentation-based pharmaceutical wastewater treatment process provided by this invention includes a pretreatment system, a biochemical treatment system, and a deep treatment system, which enables the wastewater to meet discharge standards; ② The "UASB reactor + A / O tank" combined process converts large-molecule organic matter in the wastewater into small-molecule organic matter, effectively improving the biodegradability of the wastewater. At the same time, it can remove nitrogen and phosphorus from the wastewater, effectively reducing the organic matter in the fermentation-based pharmaceutical wastewater; ③ Under the condition of TiO2 photocatalyst, substances that are difficult to biodegrade are further degraded in the photocatalytic oxidation tank. The photocatalytic oxidation technology has the characteristics of low operating cost, low secondary pollution, and good treatment effect. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments, and unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 This is a schematic diagram of the process flow of the present invention;

[0025] Figure 2 This is a schematic diagram of the photocatalytic oxidation tank and the contact disinfection tank in this invention;

[0026] Figure 3 This is a schematic diagram of the photocatalytic oxidation cell in this invention;

[0027] Figure 4 This is a schematic diagram of the spiral photocatalytic corridor in this invention;

[0028] Figure 5 This is a schematic diagram of the photocatalytic supplementary light source in this invention;

[0029] In the diagram: 1. Photocatalytic oxidation tank; 101. Water channel; 102. Frustum-shaped frame; 103. Support; 104. Photocatalytic supplementary light source; 105. Spiral photocatalytic corridor; 106. Inlet; 107. Variable frequency pump; 108. Vertical inlet pipe; 109. Photosensitive element; 110. Top water collection tank; 111. Bottom water collection tank; 112. Outlet pipe; 113. Bottom surface; 114. Baffle; 115. Deflector; 116. Light source support; 117. Light source; 118. Generator; 119. First partition wall; 120. Cover plate.

[0030] 2. Contact disinfection pool, 201. Disinfection pool, 202. Inlet channel, 203. Second partition wall, 204. Inlet channel, 205. Drainage channel, 206. Gate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0032] Example

[0033] This embodiment provides a treatment device for fermentation-based pharmaceutical wastewater, such as... Figure 1 As shown, the system includes a pretreatment system, a biological treatment system, an advanced treatment system, and a sludge treatment system. These systems are connected sequentially, with the pretreatment system and biological treatment system each connected to the sludge treatment system. It is understood that all these systems are connected via pipelines.

[0034] The pretreatment system is used to sequentially filter, homogenize, and flocculate and settle the wastewater, and then transport the treated wastewater to the biological treatment system and the generated sludge to the sludge treatment system.

[0035] The biochemical treatment system is used to degrade organic matter in wastewater, remove ammonia nitrogen and COD from wastewater, and then perform flocculation and sedimentation treatment on the wastewater after secondary homogenization. The treated wastewater is then transported to the deep treatment system, and the generated sludge is transported to the sludge treatment system.

[0036] The advanced treatment system is used to remove recalcitrant biological materials and toxic substances from wastewater, and then disinfect the wastewater before discharge.

[0037] The sludge treatment system is used to concentrate and filter the generated sludge to form sludge cake.

[0038] Specifically, the pretreatment system includes a bar screen, an equalization tank, and a coagulation sedimentation tank connected in sequence; the bar screen is used to filter out floating matter and impurities in the wastewater; the equalization tank is used to equalize the quantity and quality of the wastewater; and the coagulation sedimentation tank is used to treat the wastewater by flocculation and sedimentation.

[0039] The biochemical treatment system includes a UASB reactor, an intermediate water tank, an A / O tank, and a secondary sedimentation tank connected in sequence. The UASB reactor is used to degrade organic matter in the wastewater. The intermediate water tank is used to homogenize the wastewater again. The A / O tank is used to remove ammonia nitrogen and COD from the wastewater. The secondary sedimentation tank is used to further treat the wastewater by flocculation and sedimentation.

[0040] The advanced treatment system includes a photocatalytic oxidation tank 1 and a contact disinfection tank 2 connected in sequence; the photocatalytic oxidation tank 1 is used to remove recalcitrant biological materials and toxic substances from the wastewater; the contact disinfection tank 2 is used to disinfect the wastewater.

[0041] The sludge treatment system includes a sludge thickening tank and a belt filter press connected to each other; the sludge thickening tank is used to thicken the generated sludge; the belt filter press is used to filter the thickened sludge; and the coagulation sedimentation tank, A / O tank and secondary sedimentation tank are connected to the sludge thickening tank respectively.

[0042] The screen is a mechanical screen; the equalization tank is equipped with a mixer; the coagulation sedimentation tank includes a connected baffle flocculation tank and a vertical flow sedimentation tank. Polyaluminum chloride with flocculation effect is added to the baffle flocculation tank, and a sludge discharge valve is installed at the bottom of the vertical flow sedimentation tank. The sludge discharge valve is connected to the sludge thickening tank through a pipeline.

[0043] The UASB reactor is equipped with a water distribution device at the bottom, which is connected to the inlet pipe. The water distribution device is equipped with a horizontal radial outlet. A three-phase separator is installed in the upper middle part of the UASB reactor. A gas collection pipe for collecting biogas is installed inside the UASB reactor.

[0044] like Figure 2 and Figure 3 As shown, the photocatalytic oxidation tank 1 includes a water channel 101 and a frustum-shaped frame 102. The water channel 101 has an inlet 106 on its side wall and a variable frequency pump 107 on its upper part. The frustum-shaped frame 102 is located above the variable frequency pump 107 via a support frame 103.

[0045] The frustum-shaped frame 102 has a vertical water inlet pipe 108 arranged along the axial direction inside, leading to the water channel 101. The top of the frustum-shaped frame 102 is provided with a top water collection tank 110 and the bottom is provided with a bottom water collection tank 111. The bottom water collection tank 111 is connected to the water outlet pipe 112. One end of the vertical water inlet pipe 108 is connected to the water outlet of the variable frequency pump 107, and the other end is connected to the top water collection tank 110. A light sensor 109 is also provided on the top water collection tank 110.

[0046] A spiral photocatalytic corridor 105 is provided inside the frustum-shaped frame 102, and a photocatalytic supplementary light source 104 is provided through the spiral photocatalytic corridor 105 along its axis. The two ends of the spiral photocatalytic corridor 105 are connected to the top water collection tank 110 and the bottom water collection tank 111, respectively.

[0047] like Figure 4 As shown, the spiral photocatalytic corridor 105 includes a base plate 113 and baffles 114 vertically arranged on both sides of the base plate 113. A baffle 115 is also provided on the base plate 113. The base plate 113 is composed of multiple rectangular segments spliced ​​together, and is set at a certain angle to the ground. The baffles 114 are composed of multiple rectangular segments of the same size as the base plate 113. The baffles 114 have slots for fixing the baffles 115, which are rectangular and set perpendicular to the baffles 114. The base plate 113, baffles 114, and baffles 115 are all made of plexiglass.

[0048] The baffle plate 115 has grooves containing a photocatalyst. The long side of the baffle plate 115 is slightly lower than the short side of the baffle plate 114, and the short side of the baffle plate 115 is two-thirds the length of the short side of the baffle plate 114. The long side of the baffle plate 114 is connected to the long side of the bottom plate 113, and the long side of the baffle plate 115 is connected to the baffle plate 114. The baffle plates 115 are staggered on the baffle plate 114. The photocatalyst is TiO2. To achieve better treatment results, users can change the type of photocatalyst on the baffle plate 115 according to the specific water quality.

[0049] like Figure 5As shown, specifically, the photocatalytic supplementary light source 104 is disposed inside the frustum-shaped frame 102, around the vertical water inlet pipe 108. The photocatalytic supplementary light source 104 includes a light source support 116 and a light source 117 that passes through the light source support 116. The light source support 116 is composed of multiple organic glass discs. Each disc of the light source support 116 has a hole with the same diameter as the vertical water inlet pipe 108 in its center to allow the vertical water inlet pipe 108 to pass through. Each disc of the light source support 116 has holes with the same diameter as the light source 117 around its perimeter to allow the light source 117 to pass through. The holes around the perimeter are evenly distributed around the central hole, and their number is the same as the number of light sources 117. The light source support 116 fixes the vertical water inlet pipe 108 in the central hole and fixes the light source 117 in the holes around the perimeter. The light source 117 is connected to the generator 118 and the photosensitive element 109 above the frustum-shaped frame through wires.

[0050] Continue to refer to Figure 2 The contact disinfection pool 2 and the photocatalytic oxidation pool 1 are separated by a first partition wall 119. Inside the contact disinfection pool 2, there is a second partition wall 203 that divides the pool into a disinfection pool 201 and an inlet channel 202. The second partition wall 203 and the side wall of the disinfection pool 201 are respectively provided with an inlet channel 204 and a drainage channel 205. The drainage channel is provided with a gate 206.

[0051] More specifically, the water channel 101 in the photocatalytic oxidation tank 1 is adjacent to the water inlet channel 202 in the contact disinfection tank 2, and both are covered by a cover plate 120. The variable frequency pump 107, the bottom water collection tank 111, and the generator 118 are all located above the cover plate 120.

[0052] The specific steps of the wastewater treatment method using the above-mentioned fermentation pharmaceutical wastewater treatment device are as follows:

[0053] ① Wastewater is filtered through a mechanical screen to remove larger floating particles and impurities. The filtered wastewater is then pumped to a regulating tank for homogenization, ensuring stable flow and quality. After homogenization, the wastewater enters a flocculation tank, and the flocculated wastewater then proceeds to a vertical flow sedimentation tank for further settling.

[0054] ② The supernatant in the sedimentation tank enters the UASB reactor through a pipeline. After treatment by the UASB reactor, the organic matter in the wastewater is significantly degraded. The treated wastewater then enters the intermediate water tank for homogenization.

[0055] ③ The homogenized wastewater enters the A / O tank for aerobic biological treatment, where ammonia nitrogen and COD are further removed by the degradation effect of microorganisms.

[0056] ④ The supernatant in the aerobic tank enters the secondary sedimentation tank, where the wastewater is further settled through flocculation.

[0057] ⑤ The effluent from the secondary sedimentation tank enters the photocatalytic oxidation tank 1, where the catalyst TiO2 is added. Due to its strong oxidizing properties, it can generate a large number of hydroxyl radicals. The strong oxidizing effect of hydroxyl radicals is used to effectively remove the recalcitrant biological substances and toxic substances in the wastewater.

[0058] ⑥ Wastewater treated by photocatalytic oxidation is then disinfected before being discharged in compliance with standards.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can still adjust the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Therefore, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A treatment device for fermentation-based pharmaceutical wastewater, characterized in that, The treatment device includes: a pretreatment system, a biochemical treatment system, an advanced treatment system, and a sludge treatment system. The pretreatment system, biochemical treatment system, and advanced treatment system are arranged in sequence, and the pretreatment system and biochemical treatment system are respectively connected to the sludge treatment system. The pretreatment system is used to sequentially filter, homogenize, and flocculate and settle the wastewater, and then transport the treated wastewater to the biochemical treatment system and the generated sludge to the sludge treatment system. The biochemical treatment system is used to degrade organic matter in wastewater, remove ammonia nitrogen and COD from wastewater, and then perform flocculation and sedimentation treatment on the wastewater after secondary homogenization. The treated wastewater is then transported to the deep treatment system, and the generated sludge is transported to the sludge treatment system. The advanced treatment system is used to remove recalcitrant biological and toxic substances from wastewater, and then disinfect the wastewater before discharge. The sludge treatment system is used to concentrate and filter the generated sludge to form sludge cake. The deep processing system includes a photocatalytic oxidation tank (1) and a contact disinfection tank (2) connected in sequence. The photocatalytic oxidation tank (1) includes a water channel (101) and a frustum-shaped frame (102). The water channel (101) has an inlet (106) on its side wall and a variable frequency pump (107) on its upper part. The frustum-shaped frame (102) is located above the variable frequency pump (107) via a support frame (103). The frustum-shaped frame (102) has a vertical water inlet pipe (108) leading to the water channel (101) arranged along the axial direction inside. The top of the frustum-shaped frame (102) is provided with a top water collection trough (110) and the bottom is provided with a bottom water collection trough (111). The bottom water collection trough (111) is connected to the water outlet pipe (112). One end of the vertical water inlet pipe (108) is connected to the outlet of the variable frequency pump (107), and the other end is connected to the top water collection trough (110). A light sensor (109) is also provided on the top water collection trough (110). The frustum-shaped frame (102) is provided with a spiral photocatalytic corridor (105), and a photocatalytic supplementary light source (104) is provided through the spiral photocatalytic corridor (105) along the axis; the two ends of the spiral photocatalytic corridor (105) are respectively connected to the top water collection tank (110) and the bottom water collection tank (111); The spiral photocatalytic corridor (105) includes a base plate (113) and baffles (114) vertically arranged on both sides of the base plate (113). A baffle (115) is also provided on the base plate (113). The base plate (113) is composed of multiple rectangular segments spliced ​​together, and the base plate (113) is set at a certain angle to the ground. The baffle (114) is composed of multiple rectangular segments of the same size as the base plate (113). The baffle (114) is provided with a slot to fix the baffle (115). The baffle (115) is rectangular and is set perpendicular to the baffle (114). The baffle plate (115) is provided with grooves, and the grooves contain photocatalysts.

2. The treatment device for fermentation-based pharmaceutical wastewater according to claim 1, characterized in that, The pretreatment system includes a bar screen, an equalization tank, and a coagulation sedimentation tank connected in sequence; the bar screen is used to filter out floating matter and impurities in the wastewater; the equalization tank is used to equalize the quantity and quality of the wastewater; and the coagulation sedimentation tank is used to treat the wastewater by flocculation and sedimentation. The biochemical treatment system includes a UASB reactor, an intermediate water tank, an A / O tank, and a secondary sedimentation tank connected in sequence. The UASB reactor is used to degrade organic matter in the wastewater. The intermediate water tank is used to homogenize the wastewater again. The A / O tank is used to remove ammonia nitrogen and COD from the wastewater. The secondary sedimentation tank is used to further treat the wastewater by flocculation and sedimentation. The photocatalytic oxidation tank (1) is used to remove recalcitrant biological substances and toxic substances from wastewater; the contact disinfection tank (2) is used to disinfect wastewater. The sludge treatment system includes a sludge thickening tank and a belt filter press connected to each other; the sludge thickening tank is used to thicken the generated sludge; the belt filter press is used to filter the thickened sludge; and the coagulation sedimentation tank, A / O tank and secondary sedimentation tank are respectively connected to the sludge thickening tank.

3. The treatment device for fermentation-based pharmaceutical wastewater according to claim 1, characterized in that, The long side of the baffle (115) is slightly lower than the short side of the baffle (114). The short side of the baffle (115) is two-thirds the length of the short side of the baffle (114). The long side of the baffle (114) is connected to the long side of the bottom plate (113). The long side of the baffle (115) is connected to the baffle (114). The baffle (115) is arranged alternately on the baffle (114). The photocatalyst is TiO2; The base plate (113), baffle (114) and deflector (115) are all made of plexiglass.

4. The treatment device for fermentation-based pharmaceutical wastewater according to claim 1, characterized in that, The photocatalytic supplementary light source (104) includes a light source support (116) and a light source (117) that is disposed through the light source support (116). The light source support (116) is composed of multiple organic glass discs. Each disc of the light source support (116) has a hole with the same diameter as the vertical water inlet pipe (108) in its center to allow the vertical water inlet pipe (108) to pass through. Each disc of the light source support (116) has a hole with the same diameter as the light source (117) around its perimeter to allow the light source (117) to pass through. The light source (117) is connected to the generator (118) and the photosensitive element (109) respectively through wires.

5. The treatment device for fermentation-based pharmaceutical wastewater according to claim 2, characterized in that, The contact disinfection pool (2) and the photocatalytic oxidation pool (1) are separated by a first partition wall (119). The contact disinfection pool (2) is provided with a second partition wall (203) that divides the pool into a disinfection pool (201) and a water inlet channel (202). The second partition wall (203) and the side wall of the disinfection pool (201) are respectively provided with a water inlet channel (204) and a drainage channel (205). The drainage channel is provided with a gate (206).

6. The treatment apparatus for fermentation-based pharmaceutical wastewater according to claim 2, characterized in that, The bar is a mechanical bar; the regulating tank is equipped with a mixer; the coagulation sedimentation tank includes a connected baffle flocculation tank and a vertical flow sedimentation tank, the baffle flocculation tank is filled with polyaluminum chloride with flocculation effect, the vertical flow sedimentation tank is equipped with a sludge discharge valve, and the sludge discharge valve is connected to the sludge thickening tank through a pipeline.

7. The treatment apparatus for fermentation-based pharmaceutical wastewater according to claim 2, characterized in that, The UASB reactor is equipped with a water distribution device at the bottom, which is connected to the water inlet pipe. The water distribution device is equipped with a horizontal radial water outlet. A three-phase separator is installed in the upper middle part of the UASB reactor. A gas collection pipe for collecting biogas is installed inside the UASB reactor.

8. A method for treating fermentation-based pharmaceutical wastewater, characterized in that, The treatment apparatus for fermentation-type pharmaceutical wastewater as described in any one of claims 1 to 7 includes the following steps: ① The wastewater is filtered through a mechanical screen to remove larger floating particles and impurities. The filtered wastewater is then pumped to a regulating tank to homogenize the water quality, ensuring that the quantity and quality of the water are homogenized and stabilized. After homogenization, the wastewater enters a flocculation tank, and the flocculated wastewater enters a vertical flow sedimentation tank for further sedimentation. ② The supernatant in the sedimentation tank enters the UASB reactor through a pipeline. After being treated by the UASB reactor, the organic matter in the wastewater is significantly degraded. The treated wastewater then enters the intermediate water tank for homogenization. ③ The homogenized wastewater enters the A / O tank for aerobic biological treatment, where ammonia nitrogen and COD in the wastewater are further removed by the degradation effect of microorganisms; ④ The supernatant in the aerobic tank enters the secondary sedimentation tank, where the wastewater is further settled through flocculation. ⑤ The effluent from the secondary sedimentation tank enters the photocatalytic oxidation tank (1), and the catalyst TiO2 is added. Because of its strong oxidizing properties, it can generate a large number of hydroxyl radicals. The strong oxidizing effect of hydroxyl radicals can effectively remove the recalcitrant biological substances and toxic substances in the wastewater. ⑥ Wastewater treated by photocatalytic oxidation is then disinfected before being discharged in compliance with standards.

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