CN-121974475-A - System device and method for degrading antibiotic wastewater

CN121974475ACN 121974475 ACN121974475 ACN 121974475ACN-121974475-A

Abstract

The invention discloses a system device and a method for degrading antibiotic wastewater, wherein the system device comprises an air compressor, an ozone generator, a valve, a flowmeter, a primary immersed rotary packed bed, a secondary immersed rotary packed bed, a tail gas processor, a sedimentation tank, a raw material pump and an antibiotic wastewater reservoir, the two-stage immersed rotary packed bed is used in the system device, a large amount of continuous treatment of the antibiotic wastewater is realized under the condition that the degradation efficiency is ensured, the immersed rotary packed bed for degrading the antibiotic wastewater in the system device can effectively reduce the diameter of bubbles and improve the speed of the bubbles, thereby enhancing the update of the surface of gas and liquid, and providing a feasible new choice for efficiently and deeply removing chloramphenicol in the wastewater.

Inventors

CHEN JIANFENG
YANG ZHUOLIN
LI YANBIN
CHU GUANGWEN
LUO YONG
ZHANG LIANGLIANG
SUN BAOCHANG
ZOU HAIKUI
MAO WEI

Assignees

北京化工大学
衢州化工新材料创新研究院

Dates

Publication Date: 20260505
Application Date: 20260128

Claims (10)

1. The system device for degrading the antibiotic wastewater is characterized by comprising an air compressor, an ozone generator, a valve, a flowmeter, a primary immersed rotary packed bed, a secondary immersed rotary packed bed, a tail gas processor, a sedimentation tank, a raw material pump and an antibiotic wastewater reservoir; the outlet of the air compressor is communicated with the ozone generator; The outlet of the ozone generator is sequentially communicated with a valve and a flowmeter; the outlet pipeline of the flowmeter is divided into two branches, the first branch is communicated with the gas inlet of the primary immersed rotary packed bed, and the second branch is communicated with the gas inlet of the secondary immersed rotary packed bed; The outlet of the antibiotic wastewater reservoir is communicated with a raw material pump; The outlet of the raw material pump is communicated with the liquid inlet of the primary immersed rotary packed bed; The liquid outlet of the primary immersed rotary packed bed is communicated with the liquid inlet of the secondary immersed rotary packed bed; the liquid outlet of the secondary immersed rotary packed bed is communicated with the sedimentation tank; And the primary immersed rotary packed bed and the secondary immersed rotary packed bed are both communicated with the tail gas processor.
2. The apparatus of claim 1, wherein the primary submerged rotating packed bed comprises a rotor, a feed pipe, a guide cylinder, a baffle plate, etc., the rotor is submerged in a continuous liquid phase environment, and the gas phase enters the reactor through a gas distributor and is sheared and broken into discrete bubbles by the packing.
3. The apparatus of claim 1, wherein the second-stage submerged rotary packed bed comprises a rotor, a feed pipe, a guide cylinder, a baffle plate, etc., the rotor is submerged in a continuous liquid-phase environment, and the gas phase enters the reactor through a gas distributor and is sheared and broken into discrete bubbles by the packing.
4. A method for degradation of antibiotic wastewater using the system device of any one of claims 1 to 3, comprising the steps of: S1, preliminary degradation of antibiotic wastewater S1-1, conveying antibiotic wastewater in an antibiotic wastewater reservoir to a primary immersed rotary packed bed by a raw material pump; S1-2, conveying air to an ozone generator through an air compressor to serve as a raw material for producing ozone; S1-3, ozone produced by an ozone generator enters a primary immersed rotary packed bed and a secondary immersed rotary packed bed through a valve under the control of a flowmeter; S1-4, ozone enters the rotor through a gas distributor and is entrained by antibiotic wastewater circulating liquid flow in the reactor to pass through the filler; s1-5, dispersing ozone into bubbles with smaller size in the filler; s1-6, after leaving the filling area, bubbles pass through the side wall of the rotor and are further distributed in the main body area of the reactor, and move along with the circulating liquid flow of the antibiotic wastewater in the reactor and simultaneously undergo primary degradation reaction; S1-7, gas generated by preliminary degradation reaction and ozone which is not completely reacted escape through a liquid surface under the buoyancy effect, and finally are discharged through a gas outlet and enter a tail gas processor; s1-8, conveying the primarily degraded antibiotic wastewater to a liquid inlet of a secondary immersed rotary packed bed through a liquid outlet of the primary immersed rotary packed bed; S2, deeply degrading and settling antibiotic wastewater S2-1, carrying out the degradation reaction process of the step S1 again in the secondary immersed rotary packed bed after the primary degradation of the antibiotic wastewater, namely carrying out the deep degradation reaction; S2-2, allowing gas generated after deep degradation reaction and ozone which is not completely reacted to escape through a liquid surface under the action of buoyancy, and finally discharging the gas through a gas outlet and then entering a tail gas processor; S2-3, discharging the antibiotic wastewater after the deep degradation reaction from the secondary immersed rotary packed bed, then, entering a sedimentation tank, and discharging after sedimentation separation of insoluble solids contained in the wastewater.
5. The method for degrading antibiotic wastewater according to claim 4, wherein the degradation of the antibiotic wastewater comprises, but is not limited to, a gas-liquid heterogeneous reaction in which a gas is a discrete phase during the degradation of the antibiotic wastewater.
6. The method for degrading antibiotic wastewater according to claim 4, wherein in step S1-2, the rotor rotates at a high speed within a range of 100-1200 r/min.
7. The method for degrading antibiotic wastewater according to claim 6, wherein in step S1-2, the rotor rotates at a high speed in a rotor speed range of 300-600 r/min.
8. The method for degrading antibiotic wastewater according to claim 4, wherein in step S2-1, the rotor speed of the secondary submerged rotary packed bed is 100-1200 r/min.
9. The method for degrading antibiotic wastewater according to claim 8, wherein in step S2-1, the rotor speed of the secondary submerged rotary packed bed is 300-600 r/min.
10. The method for degrading antibiotic wastewater according to claim 4, wherein in the step S1-6, the preliminary degradation reaction is performed at a temperature of 10-35 ℃, for a time of 10-30 min, and in the step S2-1, the deep degradation reaction is performed at a temperature of 20-30 ℃ and for a time of 40-90 min.

Description

System device and method for degrading antibiotic wastewater Technical Field The invention relates to the technical field of wastewater degradation. In particular to a system device and a method for degrading antibiotic wastewater. Background Antibiotics are commonly used to treat infectious diseases in humans and animals. However, the wide application of antibiotics also brings about the problem of waste water pollution. A large number of researches show that the antibiotic sewage in the water environment can lead the resident flora of the human body to obtain drug resistance, so that the immunity of the human body drinking the water body polluted by the antibiotic for a long time is reduced, serious anaphylactic reaction and chronic toxic effect are caused, and the toxic effect can also be generated on certain aquatic organisms. Thus, the wastewater containing antibiotics must be subjected to more rigorous treatment procedures to be discharged into the environment. Advanced oxidation technology, which has a strong degradation capacity for pollutants, has been widely used for wastewater treatment. Advanced oxidation techniques include Fenton oxidation, photocatalytic oxidation, ozone oxidation, electrochemical oxidation, and the like. The ozone advanced oxidation technology has the advantages of strong oxidation capability, no secondary pollution, environmental friendliness and the like, and meets the technical requirements of large-scale wastewater treatment. In the ozone advanced oxidation technology, ozone and active components (such as hydroxyl free radicals and the like) formed by the ozone can efficiently degrade antibiotic wastewater. There is a need for a technical solution that can continuously and efficiently treat a large amount of antibiotic wastewater with ozone. Chinese patent application CN202110752496.8 discloses an immersed rotating packed bed reactor in which the inner rotor packing is immersed in the reaction material, and the sufficient shearing action provided by the reactor improves the mass transfer and reaction rate, so that the apparatus is suitable for heterogeneous systems such as gas-liquid and liquid-liquid. The invention develops a system device and a method for degrading the antibiotic wastewater by utilizing the equipment so as to expect to meet the requirement of continuous degradation of the antibiotic wastewater. Disclosure of Invention The first technical problem to be solved by the application is to provide a system device for degrading antibiotic wastewater. The system device uses two-stage immersed rotary packed beds, and realizes large-scale and continuous treatment of antibiotic wastewater under the condition of ensuring degradation efficiency. In the immersed rotary packed bed for degrading the antibiotic wastewater in the system device, a rotor is immersed in a continuous liquid phase to form an immersed environment, a gas phase enters a reactor from the center of the filler through a gas distribution pipe, and then strong shearing and crushing occur in the filler, so that the diameter of bubbles can be effectively reduced, the speed of the bubbles can be improved, the gas and the liquid are circulated in the reactor together after leaving the filler, are sucked into the center of the rotor through a guide cylinder above the rotor, and then the shearing and crushing process is repeated, so that the renewal of the surface of the gas and the liquid is enhanced, and a feasible new choice is provided for efficiently and deeply removing chloramphenicol in the wastewater. The second technical problem to be solved by the application is to provide a method for degrading antibiotic wastewater by using the system device. In order to solve the first technical problem, the invention adopts the following technical scheme: A system device for degrading antibiotic wastewater comprises an air compressor, an ozone generator, a valve, a flowmeter, a primary immersed rotary packed bed, a secondary immersed rotary packed bed, a tail gas processor, a sedimentation tank, a raw material pump and an antibiotic wastewater reservoir; the outlet of the air compressor is communicated with the ozone generator; The outlet of the ozone generator is sequentially communicated with a valve and a flowmeter; the outlet pipeline of the flowmeter is divided into two branches, the first branch is communicated with the gas inlet of the primary immersed rotary packed bed, and the second branch is communicated with the gas inlet of the secondary immersed rotary packed bed; The outlet of the antibiotic wastewater reservoir is communicated with a raw material pump; The outlet of the raw material pump is communicated with the liquid inlet of the primary immersed rotary packed bed; The liquid outlet of the primary immersed rotary packed bed is communicated with the liquid inlet of the secondary immersed rotary packed bed; the liquid outlet of the secondary immersed rotary packed bed is communicated with the s