Wastewater treatment device

Abstract

The wastewater treatment device comprises a pretreatment mechanism, a multifunctional treatment tank and a deep filtration tank, the pretreatment mechanism is communicated with the inner bottom of the multifunctional treatment tank through a first water outlet pipeline, and a Fe-Cu-C reaction layer, a catalytic oxidation filler layer and a first aeration mechanism which are distributed up and down are arranged in the multifunctional treatment tank; the Fe-Cu-C reaction layer and the catalytic oxidation filler layer are distributed above a water outlet of the first water outlet pipeline; the multifunctional treatment tank is communicated with the bottom of the deep filtering tank through a second water outlet pipeline, a filtering layer and a second aeration mechanism are arranged in the deep filtering tank, and the filtering layer is distributed above a water outlet of the second water outlet pipeline; the first aeration mechanism is connected with the ozone generator, and the second aeration mechanism is connected with the air generator. The device can reduce the energy consumption of wastewater treatment, meets the low-carbon requirement, occupies a small area, generates less sludge, and reduces the operation cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and specifically to a wastewater treatment device. Background Technology

[0002] Fermentation drugs are a class of drugs obtained by producing active ingredients through microbial fermentation, followed by separation, purification, and refining processes. Developed from antibiotic production, fermentation drugs also include vitamins, amino acids, and other substances. The production process typically involves steps such as strain selection, seed preparation, microbial fermentation, fermentation broth pretreatment and solid-liquid separation, extraction and purification, refining, drying, and packaging. This process generates large amounts of highly concentrated organic wastewater.

[0003] Based on the different types of drug production, fermentation-based pharmaceutical wastewater is divided into three categories: antibiotic pharmaceutical wastewater, which mainly includes fermentation wastewater, concentrated wastewater, washing and rinsing wastewater, cooling wastewater, fermentation waste liquid, etc.; vitamin wastewater, which mainly comes from fermentation waste liquid, floor washing wastewater, tank washing water, etc.; and amino acid wastewater, which mainly comes from fermentation tank gas washing water, evaporated gas washing water, and resin washing water, etc.

[0004] Fermentation-based pharmaceutical wastewater typically involves large discharge volumes, high concentrations of organic pollutants, the presence of recalcitrant and toxic substances, strong odors, high color, high suspended solids (SS), and high salinity, making wastewater treatment challenging. Existing treatment processes usually employ pretreatment + traditional anaerobic digestion (AO) + advanced treatment or pretreatment + anaerobic digestion + traditional AO, resulting in high energy consumption and failing to meet current principles of low-carbon wastewater treatment. Therefore, this invention provides a wastewater treatment device to address the aforementioned problems. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a wastewater treatment device that employs pretreatment + Fe-Cu-C + ozone catalytic oxidation + deep filtration, thereby reducing energy consumption and achieving low-carbon treatment of pharmaceutical wastewater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a wastewater treatment device, including a pretreatment mechanism, a multi-functional treatment tank, and a deep filtration tank. The pretreatment mechanism is connected to the bottom of the multi-functional treatment tank through a first effluent pipe. The multi-functional treatment tank is provided with an Fe-Cu-C reaction layer and a catalytic oxidation packing layer distributed vertically inside, and the Fe-Cu-C reaction layer and the catalytic oxidation packing layer are distributed above the outlet of the first effluent pipe. The multi-functional treatment tank is connected to the bottom of the deep filtration tank through a second effluent pipe. The deep filtration tank is provided with a filter layer, and the filter layer is distributed above the outlet of the second effluent pipe.

[0008] Furthermore, the multifunctional treatment tank is equipped with a first aeration mechanism, which is located below the Fe-Cu-C reaction layer; the first aeration mechanism is connected to the ozone generator through a first air inlet pipe; and a first electric regulating valve is installed on the first air inlet pipe.

[0009] Furthermore, a second aeration mechanism is provided in the deep filtration tank, and the second aeration mechanism is distributed below the filter layer; the second aeration mechanism is connected to the air generator through a second air inlet pipe; a second electric regulating valve is provided on the second air inlet pipe.

[0010] Furthermore, the outlet of the multifunctional treatment tank is located at the upper part of the multifunctional treatment tank; an outlet weir is provided inside the multifunctional treatment tank, the outlet weir is distributed circumferentially along the inner wall of the multifunctional treatment tank, and the outlet of the multifunctional treatment tank is connected to the outlet weir.

[0011] Furthermore, the outlet of the deep filtration tank is located at the upper part of the deep filtration tank; an outlet weir is provided inside the deep filtration tank, the outlet weir is distributed circumferentially along the inner wall of the deep filtration tank, and the outlet of the deep filtration tank is connected to the outlet weir.

[0012] Furthermore, in the multifunctional treatment tank, both the Fe-Cu-C reaction layer and the catalytic oxidation packing layer are fixed inside the multifunctional treatment tank by a supporting mesh plate, and the supporting mesh plate is slidably connected to the inner wall of the multifunctional treatment tank.

[0013] Furthermore, the multifunctional treatment tank is provided with a maintenance port, and a maintenance door is detachably installed at the maintenance port. The maintenance door corresponds to the position of the Fe-Cu-C reaction layer and the catalytic oxidation packing layer, and a sealing element is provided at the connection between the maintenance door and the multifunctional treatment tank.

[0014] Furthermore, the pretreatment mechanism includes an alkali neutralization reaction tank, a PAC flocculation reaction tank, and a PAM flocculation reaction tank connected in sequence. The supernatant outlet of the PAM flocculation reaction tank is connected to the bottom of the multi-functional treatment tank through a first effluent pipe.

[0015] Furthermore, the second aeration mechanism includes a precast plate and several aeration pipes; the precast plate is fixed inside the deep filtration tank, and several through holes are opened on the precast plate, with sleeves installed inside the through holes; the sleeve includes an integral connecting pipe and an aeration head, the connecting pipe is fixed inside the through hole and has internal threads, and the aeration head has several air outlets; the aeration pipe has air holes inside, and the outer wall of the aeration pipe has external threads adapted to the internal threads of the connecting pipe, one end of the aeration pipe enters the sleeve and is threadedly connected to the connecting pipe, and the other end of the aeration pipe is connected to the air generator through a second air inlet pipe; the aeration pipe can move relative to the sleeve and the size of the air outlets can be adjusted.

[0016] Furthermore, the filter layer comprises a three-layer structure: the bottom layer is a pebble layer with a particle size of 16-32 mm, the middle layer is a pebble layer with a particle size of 8-16 mm, and the top layer is a layer with a particle size of 3-5 mm and a particle size of 8-16 mm.

[0017] Furthermore, in the Fe-Cu-C reaction layer, the mass ratio of Fe:Cu:C is 1:(3-5):(1-3); the catalytic oxidation filler layer is composed of volcanic rock ceramsite, activated carbon, and graphite; the height of both the Fe-Cu-C reaction layer and the catalytic oxidation filler layer is 30-50 cm.

[0018] The beneficial effects of this invention are:

[0019] 1. This utility model requires fewer lifting devices compared to traditional biological treatment methods that require a large number of lifting devices. This utility model can reduce power consumption, save energy, and meet low-carbon requirements.

[0020] 2. The structure and process of this utility model are simple, occupy a small area, and can be made into a precast steel structure, which shortens the construction time and speeds up the project progress. Compared with the traditional biological treatment method, the area occupied can be reduced by 50% to 70%, and the construction period can be shortened by 70% to 80%.

[0021] 3. The process of this utility model is based on a multi-functional tank. Compared with the traditional biological treatment method, this utility model can reduce sludge production and reduce sludge disposal investment and operating costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the wastewater treatment device of this utility model;

[0023] Figure 2 This is a schematic diagram of the aeration pipe of the second aeration mechanism;

[0024] Figure 3 A schematic diagram of the precast slab for the second aeration mechanism;

[0025] The labels in the attached diagram are:

[0026] 1. Pretreatment unit; 2. Multifunctional treatment tank; 21. First aeration unit; 22. Fe-Cu-C reaction layer; 23. Catalytic oxidation packing layer; 3. Deep filtration tank; 31. Second aeration unit; 311. Precast slab; 312. Aeration pipe; 313. Through hole; 314. Air outlet; 315. Connecting pipe; 316. Aeration head; 32. Filter layer; 4. Ozone generator; 41. First electric regulating valve; 5. Air generator; 51. Second electric regulating valve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Reference Figure 1 This utility model provides a wastewater treatment device, including a pretreatment unit 1, a multi-functional treatment tank 2, and a deep filtration tank 3. The pretreatment unit 1 is connected to the bottom of the multi-functional treatment tank 2 via a first effluent pipe. The multi-functional treatment tank 2 contains an Fe-Cu-C reaction layer 22 and a catalytic oxidation packing layer 23, arranged vertically, with the Fe-Cu-C reaction layer 22 and the catalytic oxidation packing layer 23 positioned above the outlet of the first effluent pipe. The multi-functional treatment tank 2 is connected to the bottom of the deep filtration tank 3 via a second effluent pipe. The deep filtration tank 3 contains a filter layer 32, positioned above the outlet of the second effluent pipe.

[0029] like Figure 1 As shown, the multi-functional treatment tank 2 is equipped with a first aeration mechanism 21, which is located below the Fe-Cu-C reaction layer 22. The first aeration mechanism 21 is connected to the ozone generator 4 through a first air inlet pipe, and a first electric regulating valve 41 is installed on the first air inlet pipe. The deep filtration tank 3 is equipped with a second aeration mechanism 31, which is located below the filter layer 32. The second aeration mechanism 31 is connected to the air generator 5 through a second air inlet pipe, and a second electric regulating valve 51 is installed on the second air inlet pipe.

[0030] like Figure 1 As shown, the outlet of the multi-functional treatment tank 2 is located at the upper part of the multi-functional treatment tank 2. An outlet weir is provided inside the multi-functional treatment tank 2, and the outlet weir is distributed circumferentially along the inner wall of the multi-functional treatment tank 2. The outlet of the multi-functional treatment tank 2 is connected to the outlet weir. The outlet of the depth filtration tank 3 is located at the upper part of the depth filtration tank 3. An outlet weir is provided inside the depth filtration tank 3, and the outlet weir is distributed circumferentially along the inner wall of the depth filtration tank 3. The outlet of the depth filtration tank 3 is connected to the outlet weir.

[0031] After pretreatment by the pretreatment unit 1, the supernatant of the organic wastewater enters the bottom of the multi-functional treatment tank 2 through the first effluent pipe. Simultaneously, ozone generated by the ozone generator 4 mixes with the supernatant from the pretreatment unit through the first air inlet pipe and the first aeration unit 21, with the ozone dosage controlled by the first electric regulating valve 41 on the first air inlet pipe. The mixed wastewater then passes sequentially through the Fe-Cu-C reaction layer 22 and the catalytic oxidation packing layer 23, where pollutants such as COD, ammonia nitrogen, total nitrogen, and color are removed. The treated supernatant overflows to the effluent weir around the top of the multi-functional treatment tank 2. The water in the weir flows into the bottom of the deep filtration tank 3 through the second effluent pipe. Air from the air generator 5 enters the bottom of the deep filtration tank 3 through the second air inlet pipe and the second aeration unit 31, mixing with the supernatant from the multi-functional tank. The air dosage is controlled by the second electric regulating valve 51 on the second air inlet pipe. The deep filtration tank further removes pollutants from the wastewater through the filter layer 32, ensuring that the effluent meets discharge requirements. After treatment, the supernatant overflows to the effluent weir around the upper part of the deep filtration tank 3, and is finally discharged through the drainage pipe.

[0032] In a preferred embodiment of this utility model, the pretreatment unit 1 includes an alkali neutralization reaction tank, a PAC (polyaluminum chloride) flocculation reaction tank, and a PAM (polyacrylamide) flocculation reaction tank connected in sequence. Each of the three tanks is equipped with a stirring device. The supernatant outlet of the PAM flocculation reaction tank is connected to the bottom of the multi-functional treatment tank 2 via a first effluent pipe. The alkali neutralization reaction tank is connected to a liquid alkali storage mechanism and is equipped with a metering pump to control the amount of liquid alkali added. The PAC flocculation reaction tank is connected to a PAC storage mechanism and is equipped with a metering pump to control the amount of PAC added. The PAM flocculation reaction tank is connected to a PAM storage mechanism and is equipped with a metering pump to control the amount of PAM added.

[0033] Wastewater generated from the main pharmaceutical plant is connected to the inlet of pretreatment unit 1 through a wastewater collection pipe. The organic wastewater passes through an alkali neutralization reaction tank, a PAC flocculation reaction tank, and a PAM flocculation reaction tank in sequence to remove suspended solids and reduce the total phosphorus content in the wastewater. The generated sludge is pumped to the sludge storage tank through a sludge discharge pump connected to the sludge outlet, and suspended solids enter the sludge storage tank through the sludge discharge outlet.

[0034] In a preferred embodiment of this utility model, in the multifunctional treatment tank 2, both the Fe-Cu-C reaction layer 22 and the catalytic oxidation packing layer 23 are fixed inside the multifunctional treatment tank 2 by a supporting mesh plate. The supporting mesh plate is slidably connected to the inner wall of the multifunctional treatment tank 2 (via a slide rail and a slider). A maintenance port is provided on the multifunctional treatment tank 2, and a detachable maintenance door is provided at the maintenance port. The maintenance door corresponds to the positions of the Fe-Cu-C reaction layer 22 and the catalytic oxidation packing layer 23, and a sealing element is provided at the connection between the maintenance door and the multifunctional treatment tank 2. When it is necessary to repair or replace the Fe-Cu-C reaction layer 22, the catalytic oxidation packing layer 23, and the first aeration mechanism 21, the maintenance door is opened, and the supporting mesh plate of the Fe-Cu-C reaction layer 22 and / or the catalytic oxidation packing layer 23 is pulled out for easy maintenance and replacement. After completion, the maintenance port is sealed through the maintenance door.

[0035] In this utility model, the first aeration mechanism 21 and the second aeration mechanism 31 can be selected as needed, and any structure that can achieve the aeration function is within the protection scope of this utility model.

[0036] As a preferred embodiment of this utility model, refer to Figures 2-3 The second aeration mechanism 31 includes a precast plate 311 and several aeration pipes 312. The precast plate 311 is fixed inside the deep filtration tank 3. Several through holes 313 are opened on the precast plate 311, and a sleeve is installed in the through holes 313. The sleeve includes an integral connecting pipe 315 and an aeration head 316. The connecting pipe 315 is fixed inside the through hole 313 and is provided with internal threads. Several elongated air outlets 314 are opened on the aeration head 316 and are distributed along the axial direction of the connecting pipe 315. The aeration pipe 312 has a vent hole inside, and its outer wall has an external thread that matches the internal thread of the connecting pipe 315. One end of the aeration pipe 312 enters the sleeve and is threadedly connected to the connecting pipe 315. The other end of the aeration pipe 312 is connected to the air generator 5 through a second air inlet pipe. Air from the air generator 5 enters the vent hole of the aeration pipe 312 and the aeration head 316 through the second air inlet pipe, and is finally discharged through the air outlet 314. The aeration pipe 312 can move relative to the sleeve, and the size of the air outlet 314 can be adjusted.

[0037] In application, multiple connecting pipes 315 are fixed into multiple through holes 313 of the precast slab 311. The connecting pipes 315 and the aeration heads 316 are hollow and interconnected, with the aeration heads 316 distributed on one side of the precast slab 311. An aeration pipe 312 is screwed into the connecting pipe 315, with its end entering the aeration head 316. When the aeration pipe 312 is screwed clockwise, it moves closer to the aeration head 316, and its end can block the air outlet 314, reducing the aeration rate at the outlet 314. When the aeration pipe 312 is screwed counterclockwise, it moves away from the aeration head 316, releasing the blocking effect of its end on the air outlet 314, thus increasing the aeration rate at the outlet 314.

[0038] The end shape of the aeration pipe 312 can be designed to be the same as that of the aeration head 316, such as a cylindrical structure, and the end of the aeration pipe 312 can fit against the inner wall of the aeration head 316.

[0039] In a preferred embodiment of this utility model, the mass ratio of Fe:Cu:C in the Fe-Cu-C reaction layer is 1:(3-5):(1-3), and the height of the Fe-Cu-C reaction layer is 30-50cm. Fe is made from waste iron wire or iron shavings from steel mills, not iron filings; Cu is made from waste copper wire or copper shavings from steel mills, not copper filings; and C is a mixture of activated carbon and graphite. The catalytic oxidation filler layer 23 is composed of volcanic rock ceramsite, activated carbon, and graphite, and its height is 30-50cm.

[0040] In a preferred embodiment of the present invention, the filter layer 32 comprises a three-layer structure: the bottom layer is a pebble layer with a particle size of 16-32 mm, the middle layer is a pebble layer with a particle size of 8-16 mm, and the top layer is a layer with a particle size of 3-5 mm and a particle size of 8-16 mm.

[0041] As a preferred embodiment of this utility model, the alkali neutralization reaction tank, PAC flocculation reaction tank and PAM flocculation reaction tank integrated in the pretreatment unit 1 are all made of corrosion-resistant carbon steel or stainless steel. Corrosion-resistant carbon steel is recommended. The top is provided with multiple chemical dosing ports, the left side is provided with a water inlet, the right side is provided with a water outlet, the front bottom is provided with a sludge discharge port, and the rear higher position is provided with a slag discharge port.

[0042] In a preferred embodiment of this utility model, the multi-functional treatment tank 2 and the deep filtration tank 3 are made of reinforced concrete, corrosion-resistant carbon steel, or stainless steel, with reinforced concrete or corrosion-resistant carbon steel being recommended. The effluent weir plate is made of PP board or stainless steel plate; for PP board, a thickness of 10mm or more is recommended, and for stainless steel plate, a thickness of 2.5–4mm is recommended, with 10mm thick PP board being preferred. The gap between the effluent weir plate and the multi-functional treatment tank 2 is recommended to be sealed with an 8mm thick rubber gasket or directly with structural adhesive.

[0043] Effect comparison:

[0044] The wastewater from this pharmaceutical company originates from the production processes of products such as histidine, histidine hydrochloride, histidine bacterial powder, levodopa, and tyrosine. The wastewater quality is shown in Table 1.

[0045] Table 1. Overview of Wastewater Collection Prediction Data Indicators

[0046]

[0047] The traditional treatment process is as follows: wastewater collection tank --- hydrolysis acidification tank --- water distribution well --- anaerobic digester --- anaerobic sedimentation tank --- two-stage A / O process --- sedimentation tank --- phosphorus removal treatment flocculation reaction --- secondary sedimentation tank --- discharge meeting standards. Wastewater treatment effect: system effluent COD≤200mg / L, average daily power consumption 12000kW / h, anaerobic digester steam demand 613.71kg / h (260℃, 0.4MPa), sludge treatment capacity 100~200kgDS / h.

[0048] The wastewater treatment effect of this utility model is: effluent COD≤80mg / L, average daily power consumption 4000kW / h, no anaerobic digester required, no steam needed, and sludge treatment capacity 10~20kgDS / h.

[0049] Therefore, this utility model saves energy, meets low-carbon requirements, has a simple structure and process, occupies a small area, can be made into a precast steel structure, shortens construction time, can accelerate project progress, reduce sludge generation, and reduce sludge disposal investment and operating costs.

[0050] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A wastewater treatment device, characterized in that, It includes a pretreatment unit (1), a multi-functional treatment tank (2), and a deep filtration tank (3); The pretreatment mechanism (1) is connected to the bottom of the multi-functional treatment tank (2) through the first water outlet pipe. The multi-functional treatment tank (2) is provided with Fe-Cu-C reaction layer (22) and catalytic oxidation packing layer (23) distributed vertically inside, and the Fe-Cu-C reaction layer (22) and catalytic oxidation packing layer (23) are distributed above the water outlet of the first water outlet pipe. The multi-functional treatment tank (2) is connected to the bottom of the deep filtration tank (3) through the second water outlet pipe. The deep filtration tank (3) is provided with a filter layer (32), and the filter layer is distributed above the water outlet of the second water outlet pipe.

2. The wastewater treatment device according to claim 1, characterized in that, The multi-functional treatment tank (2) is equipped with a first aeration mechanism (21), which is located below the Fe-Cu-C reaction layer (22). The first aeration mechanism (21) is connected to the ozone generator (4) through a first air inlet pipe. The first intake pipe is equipped with a first electric regulating valve (41).

3. The wastewater treatment device according to claim 1, characterized in that, The deep filtration tank (3) is provided with a second aeration mechanism (31), which is located below the filter layer (32); the second aeration mechanism (31) is connected to the air generator (5) through a second air inlet pipe; A second electric regulating valve (51) is installed on the second air intake pipe.

4. The wastewater treatment device according to claim 1, characterized in that, The outlet of the multi-functional treatment tank (2) is located at the top of the multi-functional treatment tank (2); The multi-functional treatment tank (2) is equipped with an outlet weir, which is distributed circumferentially along the inner wall of the multi-functional treatment tank (2). The outlet of the multi-functional treatment tank (2) is connected to the outlet weir.

5. The wastewater treatment device according to claim 1, characterized in that, The outlet of the deep filtration tank (3) is located at the top of the deep filtration tank (3); The deep filtration tank (3) is equipped with an outlet weir, which is distributed circumferentially along the inner wall of the deep filtration tank (3), and the outlet of the deep filtration tank (3) is connected to the outlet weir.

6. The wastewater treatment device according to claim 1, characterized in that, In the multifunctional treatment tank (2), the Fe-Cu-C reaction layer (22) and the catalytic oxidation packing layer (23) are both fixed in the multifunctional treatment tank (2) by a support mesh plate, and the support mesh plate is slidably connected to the inner wall of the multifunctional treatment tank (2).

7. The wastewater treatment device according to claim 1, characterized in that, The multifunctional treatment tank (2) is provided with a maintenance port, and a maintenance door is detachably provided at the maintenance port. The maintenance door corresponds to the position of the Fe-Cu-C reaction layer (22) and the catalytic oxidation packing layer (23), and a sealing element is provided at the connection between the maintenance door and the multifunctional treatment tank (2).

8. The wastewater treatment apparatus according to claim 1, characterized in that, The pretreatment unit (1) includes an alkali neutralization reaction tank, a PAC flocculation reaction tank and a PAM flocculation reaction tank connected in sequence. The supernatant outlet of the PAM flocculation reaction tank is connected to the bottom of the multi-functional treatment tank (2) through a first effluent pipe.

9. The wastewater treatment apparatus according to claim 3, characterized in that, The second aeration mechanism (31) includes a precast plate (311) and several aeration pipes (312); The precast plate (311) is fixed inside the deep filtration tank (3). The precast plate (311) has several through holes (313) and a sleeve is installed inside the through holes (313). The sleeve includes an integral connecting pipe (315) and an aeration head (316). The connecting pipe (315) is fixed inside the through hole (313) and has an internal thread. The aeration head (316) has several air outlets (314). The aeration pipe (312) is provided with an air vent, and the outer wall of the aeration pipe (312) is provided with an external thread that is compatible with the internal thread of the connecting pipe (315). One end of the aeration pipe (312) enters the sleeve and is threadedly connected to the connecting pipe (315). The other end of the aeration pipe (312) is connected to the air generator (5) through the second air inlet pipe. The aeration pipe (312) can move relative to the sleeve and adjust the size of the air outlet (314).

10. The wastewater treatment apparatus according to claim 1, characterized in that, The filter layer (32) comprises a three-layer structure: the bottom layer is a pebble layer with a particle size of 16-32 mm, the middle layer is a pebble layer with a particle size of 8-16 mm, and the top layer is a layer with a particle size of 3-5 mm and a particle size of 8-16 mm.

Images