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CN-117550753-B - Combined removing device and method for heavy metals and antibiotics in wastewater

CN117550753BCN 117550753 BCN117550753 BCN 117550753BCN-117550753-B

Abstract

The invention relates to the field of sewage treatment and discloses a device and a method for jointly removing heavy metals and antibiotics in wastewater, wherein the device comprises a coagulation reaction area, a pre-sedimentation tank, a high-efficiency sedimentation tank, an ozone gas distribution area, an ozone oxidation tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, a secondary aerobic tank and a disinfection tank, wherein the coagulation reaction area is symmetrically and fixedly connected to one side of the pre-sedimentation tank, and the high-efficiency sedimentation tank is fixedly connected to the other side of the pre-sedimentation tank.

Inventors

  • ZHANG YOUDE
  • ZHANG MING
  • ZHANG QINGLING
  • QIAN YIWU
  • WANG QINGQUAN
  • CHEN MINGGEN

Assignees

  • 安徽新宇环保科技股份有限公司
  • 赛科斯智能装备(合肥)有限公司

Dates

Publication Date
20260505
Application Date
20231222

Claims (7)

  1. 1. The combined wastewater heavy metal and antibiotics removing device comprises a coagulation reaction area (17), a pre-sedimentation tank (3), a high-efficiency sedimentation tank (4), an ozone gas distribution area (5), an ozone oxidation tank (7), a primary anoxic tank (8), a primary aerobic tank (9), a secondary anoxic tank (11), a secondary aerobic tank (13) and a disinfection tank (14), wherein the coagulation reaction area (17) is symmetrically and fixedly connected to one side of the pre-sedimentation tank (3), and the high-efficiency sedimentation tank (4) is fixedly connected to the other side of the pre-sedimentation tank (3); The ozone gas distribution area (5) is fixedly connected to one side of the efficient sedimentation tank (4), the ozone oxidation tank (7) is fixedly connected to one side of the ozone gas distribution area (5), the primary anoxic tank (8) is fixedly connected to one end of the ozone oxidation tank (7), the primary aerobic tank (9) is fixedly connected to one side of the primary anoxic tank (8), the secondary anoxic tank (11) is fixedly connected to one side of the primary aerobic tank (9), the secondary aerobic tank (13) is fixedly connected to one side of the secondary anoxic tank (11), and the disinfection tank (14) is fixedly connected to one side of the secondary aerobic tank (13); the device is characterized in that the outer surface of the coagulation reaction zone (17) is uniformly and fixedly connected with a dosing barrel (20), the interiors of the coagulation reaction zone (17) and the dosing barrel (20) are fixedly provided with a stirrer (2), and the interiors of the dosing barrel (20) are fixedly provided with a dosing pump (19); The ozone oxidation device is characterized in that an ozone partition plate (6) is uniformly arranged in the ozone oxidation pond (7), an aeration system (10) is fixedly arranged at the inner bottom ends of the ozone gas distribution area (5) and the primary aerobic pond (9), a flat membrane component (12) is symmetrically and fixedly arranged at the inner bottom end of the secondary aerobic pond (13), a water inlet (1) is arranged at one end of the coagulation reaction area (17), a water outlet (15) is arranged at the center of the side surface of the disinfection pond (14), an ozone pipeline (21) is connected between the ozone gas distribution area (5) and the disinfection pond (14), an ozone generator (16) is arranged in the middle of the ozone pipeline (21) between the ozone gas distribution area (5) and the disinfection pond (14), and a cleaning component (23) is arranged inside the pre-sedimentation pond (3) and the efficient sedimentation pond (4); The cleaning component (23) comprises a sludge discharging shaft (238), a second chain (239) and a driving shaft (241), wherein two ends of the second chain (239) are respectively connected to the outer surfaces of one end of the sludge discharging shaft (238) and one end of the driving shaft (241) in a meshed mode, a driving water wheel (242) is fixedly arranged on the outer surface of the middle part of the driving shaft (241), a sludge discharging roller (237) is fixedly arranged on the outer surface of the middle part of the sludge discharging shaft (238), and sludge scraping grooves (235) are formed in the outer surfaces of the sludge discharging roller (237); the mud discharging shaft (238) and the driving shaft (241) are fixedly provided with second chain wheels (240) on the outer surfaces of the two ends, a first chain wheel (233) is fixedly arranged on the outer surface of one end of the mud discharging shaft (238), a first chain (232) is connected to the outer surface of the first chain wheel (233) in a meshed mode, a driving shaft (234) is rotatably connected to the inner surfaces of the two ends of the first chain (232), a cleaning shaft (231) is connected to one end of the driving shaft (234) in a meshed mode, and cleaning wires (236) are fixedly arranged on the outer surface of the middle of the cleaning shaft (231).
  2. 2. The combined wastewater heavy metal and antibiotic removal device according to claim 1, wherein a sedimentation tank (33) is formed in the pre-sedimentation tank (3), a force-dissipating square tube (34) is arranged on one side of the interior of the sedimentation tank (33), a separation plate (35) is arranged in the center of the interior of the force-dissipating square tube (34), an overflow port (31) is formed in the outer surface of the middle of the force-dissipating square tube (34), an overflow folded plate (32) is arranged on the outer surface of the force-dissipating square tube (34) and positioned at the peripheral edge of the overflow port (31), and a water injection head (36) is fixedly arranged at the top edge of the force-dissipating square tube (34).
  3. 3. The combined wastewater heavy metal and antibiotic removal device according to claim 2, wherein the efficient sedimentation tank (4) comprises a limiting cylinder (41), a sludge discharge pipe (43) and a sludge sedimentation zone (44), the limiting cylinder (41) is fixedly installed at the bottom center of the sludge sedimentation zone (44), the sludge discharge pipe (43) is welded at the bottom center of the limiting cylinder (41), a limiting sleeve (42) is symmetrically welded on the outer surface of one end of the limiting cylinder (41), a central guide cylinder (45) is fixedly installed at the inner center of the sludge sedimentation zone (44), a water inlet pipe (47) is fixedly connected to the outer surface of the upper part of the central guide cylinder (45), and triangular overflow weirs (46) are symmetrically and fixedly installed at the top of the sludge sedimentation zone (44).
  4. 4. The combined wastewater heavy metal and antibiotic removing device according to claim 3, wherein one end of the water inlet pipe (47) is inserted into the upper end of the pre-sedimentation tank (3), a reflecting plate is arranged at the bottom end of the central guide cylinder (45), an inclined pipe is paved in the sludge sedimentation area (44), first limiting holes are formed in two sides of the upper part of the force dissipating square pipe (34), and the driving water wheel (242) is rotatably clamped in the force dissipating square pipe (34) through the first limiting holes in the middle of the driving shaft (241).
  5. 5. The combined wastewater heavy metal and antibiotic removal device according to claim 4, wherein the sludge discharge roller (237) is rotationally clamped at the inner center of the limit cylinder (41) through a sludge discharge shaft (238), the transmission shaft (234) is rotationally clamped at the outer surface of the limit cylinder (41) through a limit sleeve (42), a second limit hole is formed in the outer surface of the middle of the sludge discharge pipe (43), and the cleaning shaft (231) is rotationally clamped inside the sludge discharge pipe (43) through the second limit hole.
  6. 6. The combined wastewater heavy metal and antibiotic removal device according to claim 5, wherein the cleaning wire (236) is movably and contradictingly connected with the outer surface of the sludge discharge roller (237) in the sludge discharge pipe (43), and the driving water wheel (242) is aligned with the bottom of the water injection head (36) in the upper part of the absorption square pipe (34).
  7. 7. A method for using a combined wastewater heavy metal and antibiotic removal device, which adopts the combined wastewater heavy metal and antibiotic removal device as claimed in any one of claims 1-6, and is characterized by comprising the following steps: Firstly, collecting livestock and poultry breeding wastewater into a coagulation reaction zone (17) for coagulation, conveying a mixture after coagulation reaction into a pre-sedimentation tank (3) for pre-sedimentation, and reducing hydraulic kinetic energy; Step two, conveying the supernatant into the high-efficiency sedimentation tank (4) to remove heavy metals by sedimentation, and collecting the supernatant filtered by the inclined tube in the high-efficiency sedimentation tank (4) into a water collecting tank through a triangular overflow weir (46) to flow to the next working procedure; Step three, sequentially flowing into an ozone gas distribution area (5), an ozone oxidation tank (7), a primary anoxic tank (8), a primary aerobic tank (9) and a secondary anoxic tank (11) through a water collecting tank to perform oxidation reaction and nitration reaction, so as to degrade antibiotics and organic matters which are difficult to degrade; Step four, performing mud-water separation under the high-efficiency solid-liquid separation effect of the flat membrane component (12), and finally enabling clear water to enter the disinfection tank (14), and periodically discharging activated sludge to a sludge tank, wherein the disinfection tank (14) utilizes ozone generated by an ozone generator (16) for disinfection and then discharging the disinfected activated sludge to reach the standard.

Description

Combined removing device and method for heavy metals and antibiotics in wastewater Technical Field The invention relates to the field of sewage treatment, in particular to a device and a method for jointly removing heavy metals and antibiotics in wastewater. Background Agricultural non-point source pollution is an important cause of eutrophication of water, and livestock and poultry breeding wastewater is one of the most main sources of agricultural non-point source pollution. The contradiction between the development of livestock and poultry farming and environmental protection is increasingly prominent. With the increase of population and the improvement of living standard of people, the consumption demand of livestock and poultry products is increased, and livestock and poultry breeding wastewater belongs to typical agricultural high-concentration wastewater and has the characteristics of high organic matters, high nitrogen and phosphorus, high heavy metals and antibiotics; The prior livestock and poultry breeding wastewater treatment device has complicated treatment process and complex device structure, and meanwhile, when heavy metals in the wastewater are removed, the wastewater is only conveyed to the sedimentation tank to naturally settle, so that the sedimentation efficiency cannot be improved, and when antibiotic organic matters are treated, chlorine and chlorine dioxide are generally used for reaction removal, so that the treatment cost is high, the efficiency is low, and sediment in the sedimentation tank cannot be synchronously discharged. Disclosure of Invention The invention aims to provide a combined device and a method for removing heavy metals and antibiotics from wastewater, which solve the technical problems of how to improve the efficiency of removing heavy metals and antibiotics organics of a livestock and poultry breeding wastewater treatment device and reduce the cost of wastewater treatment. The invention aims at realizing the technical scheme that the combined device for removing heavy metals and antibiotics in wastewater comprises a coagulation reaction area, a pre-sedimentation tank, a high-efficiency sedimentation tank, an ozone gas distribution area, an ozone oxidation tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, a secondary aerobic tank and a disinfection tank, wherein the coagulation reaction area is symmetrically and fixedly connected to one side of the pre-sedimentation tank, and the high-efficiency sedimentation tank is fixedly connected to the other side of the pre-sedimentation tank; The ozone gas distribution area is fixedly connected to one side of the efficient sedimentation tank, the ozone oxidation tank is fixedly connected to one side of the ozone gas distribution area, the primary anoxic tank is fixedly connected to one end of the ozone oxidation tank, the primary aerobic tank is fixedly connected to one side of the primary anoxic tank, the secondary anoxic tank is fixedly connected to one side of the primary aerobic tank, the secondary aerobic tank is fixedly connected to one side of the secondary anoxic tank, and the disinfection tank is fixedly connected to one side of the secondary aerobic tank; The external surface of the coagulation reaction zone is uniformly and fixedly connected with a dosing barrel, the interiors of the coagulation reaction zone and the dosing barrel are fixedly provided with a stirrer, and the interiors of the dosing barrel are fixedly provided with a dosing pump; The inside of ozone oxidation pond evenly is provided with the ozone baffle, the inside bottom of ozone gas distribution district and one-level good oxygen pond is all fixed mounting has aeration system, the inside bottom symmetry fixed mounting of second grade good oxygen pond has dull and stereotyped membrane module, the one end of coagulation reaction district is provided with the water inlet, the side center of disinfection pond is provided with the delivery port, be connected with the ozone pipeline between ozone gas distribution district and the disinfection pond, just ozone pipeline middle part is provided with ozone generator between ozone gas distribution district and the disinfection pond, inside is provided with cleaning element between pre-sedimentation pond and the high-efficient sedimentation pond. As the preferable scheme of the invention, a sedimentation tank is arranged in the pre-sedimentation tank, a force-dissipating square pipe is arranged on one side of the interior of the sedimentation tank, a partition plate is arranged in the center of the interior of the force-dissipating square pipe, an overflow port is arranged on the outer surface of the middle part of the force-dissipating square pipe, an overflow folded plate is arranged on the outer surface of the force-dissipating square pipe and positioned at the peripheral edge of the overflow port, and a water injection head is fixedly arranged at the top edge of the force-dis