CN116002911A - Combined ozone catalytic oxidation water purification device and raw water purification method - Google Patents
Combined ozone catalytic oxidation water purification device and raw water purification method Download PDFInfo
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- CN116002911A CN116002911A CN202211714814.2A CN202211714814A CN116002911A CN 116002911 A CN116002911 A CN 116002911A CN 202211714814 A CN202211714814 A CN 202211714814A CN 116002911 A CN116002911 A CN 116002911A
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Abstract
The invention aims to solve the technical problem of providing a combined ozone catalytic oxidation water purification device and a raw water purification method, which realize low ozone addition and high ozone utilization efficiency by carrying out composite catalytic oxidation on organic matters through ozone bubbles and ozone micro-nano bubbles, and comprise an ozone generation device, a micro-nano bubble generator, an ozone oxidation reactor and a raw water tank; the ozone oxidation reactor is internally and sequentially provided with a transversely distributed membrane assembly, an ultraviolet lamp post group, a catalyst group and an active carbon group from bottom to top, a water inlet and a water outlet of the membrane assembly respectively extend to the outside of the ozone oxidation reactor, and a purified water outlet is arranged at the upper part of the ozone oxidation reactor; the water supply port of the raw water tank is communicated with the water inlet of the membrane component, and the ozone gas supply port of the ozone generating device is respectively communicated with the gas inlet of the micro-nano bubble generator and the gas inlet of the ozone oxidation reactor; the water suction port and the water discharge port of the micro-nano bubble generator are communicated with the side wall of the ozone oxidation reactor, and the water suction port of the micro-nano bubble generator is higher than the water discharge port of the micro-nano bubble generator.
Description
Technical Field
The invention relates to the technical field of wastewater ozone treatment, in particular to a combined ozone catalytic oxidation water purification device.
Background
Ozone is widely used as a strong oxidant in water treatment, and the oxidation mechanism can be divided into direct oxidation and indirect oxidation of ozone, wherein the ozone is selectively reacted, the oxidation capability of the ozone is only aimed at partial organic matters, the ozone is basically non-selective, and the oxidation mechanism of the ozone mainly depends on the oxidation reaction of hydroxyl free radicals and organic matters. The prior art (patent number CN202020375240.0 invention) discloses an ozone catalytic oxidation device for wastewater treatment, which mainly comprises an ozone generator, a reaction box body and a wastewater pipeline, wherein the ozone generator is connected with an ozone diffusion device through a pipeline, the wastewater pipeline is connected with the ozone diffusion device through a water inlet pump, the reaction box body comprises a tail gas treatment device, a water outlet weir, a catalytic filler area and a water distribution system which are sequentially arranged in a shell from top to bottom, and the water distribution system is uniformly arranged at the bottom of the shell; ozone generated in the ozone generator is fully mixed with wastewater in the ozone diffusion device, then sequentially passes through the water distribution system and the catalytic filler zone, and is subjected to oxidation-reduction reaction under the action of a catalyst in the catalytic filler zone.
The ozone oxidation reactor has the defects that the ozone is only reacted with water to be treated, so that the ozone utilization rate is low, and the ozone addition amount is large. In the ozone catalytic oxidation technology used in the water treatment industry, ozone is often directly added or added in a microporous aeration mode, so that the formed ozone bubbles have large diameters, the rising speed of the bubbles is high, and the reaction is incomplete.
Disclosure of Invention
The invention aims to solve the technical problem of providing a combined ozone catalytic oxidation water purification device and a raw water purification method, which realize low ozone addition and high ozone utilization efficiency by carrying out composite catalytic oxidation on organic matters through ozone bubbles and ozone micro-nano bubbles.
The invention is realized by the following technical scheme:
a combined ozone catalytic oxidation water purification device comprises an ozone generation device, a micro-nano bubble generator, an ozone oxidation reactor and a raw water tank;
the ozone oxidation reactor is internally and sequentially provided with a transversely distributed membrane assembly, an ultraviolet lamp post group, a catalyst group and an active carbon group from bottom to top, a water inlet and a water outlet of the membrane assembly respectively extend to the outside of the ozone oxidation reactor, and a purified water outlet is arranged at the upper part of the ozone oxidation reactor;
the water supply port of the raw water tank is communicated with the water inlet of the membrane component, and the ozone gas supply port of the ozone generating device is respectively communicated with the gas inlet of the micro-nano bubble generator and the gas inlet of the ozone oxidation reactor;
the water suction port and the water discharge port of the micro-nano bubble generator are communicated with the side wall of the ozone oxidation reactor, and the water suction port of the micro-nano bubble generator is higher than the water discharge port of the micro-nano bubble generator.
Further, the ozone generating device comprises an oxygen bottle, a gas dryer and an ozone generator which are sequentially communicated, and an ozone gas supply port of the ozone generator is respectively communicated with a gas inlet of the micro-nano bubble generator and an ozone gas supply pipe through a three-way valve;
the side wall of the ozone oxidation reactor is provided with an ozone recovery pipe close to the top, the other end of the ozone recovery pipe is communicated with the side wall of the ozone supply pipe, and the ozone recovery pipe is provided with a circulating air pump.
Further, the water absorbing port of the micro-nano bubble generator is positioned in the area between the catalyst group and the active carbon group, and the water draining port of the micro-nano bubble generator is positioned in the area between the membrane component and the ultraviolet lamp post group.
Further, the water distribution device is communicated with the water outlet of the micro-nano bubble generator and is vertically fixed on the inner side wall of the ozone oxidation reactor, the water distribution device comprises a plurality of water distribution pipes which are communicated in a crisscross manner, a plurality of umbrella-shaped water distribution heads are arranged on each water distribution pipe, and a plurality of water distribution holes are uniformly distributed on the top surface of each water distribution head.
Further, the top surface and the bottom surface of the ultraviolet lamp post group and the catalyst group are respectively provided with a top baffle plate and a bottom baffle plate, and the top baffle plates and the bottom baffle plates are distributed in a staggered way.
Further, a floating ball level gauge and an ozone tail gas destructor are arranged at the top of the ozone oxidation reactor.
A method for purifying raw water by using the combined ozone catalytic oxidation water purification device of claim 1, comprising the following steps:
(1) Opening an ozone oxidation reactor, filling a catalyst and activated carbon in a catalyst group and an activated carbon group, and starting an ultraviolet lamp post group for preheating;
(2) Pumping the wastewater to be treated into a water inlet of a membrane assembly from a raw water tank, enabling the wastewater to flow in the membrane assembly, enabling a part of wastewater to enter an ozone oxidation reactor after membrane filtration, and enabling the rest liquid to flow out through a water outlet to form membrane concentrated water;
when the wastewater to be treated in the ozone oxidation reactor is full, stopping water supply from the raw water tank;
(3) Starting an ozone generating device, wherein ozone generated by the ozone generating device firstly enters an ozone oxidation reactor, and when the concentration of the ozone in the ozone oxidation reactor is stable, an ozone air supply port of the ozone generating device conveys a part of ozone to a micro-nano bubble generator;
ozone enters the microbubble generator, meanwhile, a water sample to be treated in the ozone oxidation reactor enters the ozone oxidation reactor through a water suction port of the microbubble generator, ozone gas forms micro-nano bubbles with the diameter of less than 50 mu m in the microbubble generator, the micro-nano bubbles and the water sample to be treated are mixed to form dissolved air micro-nano bubble water, and the dissolved air micro-nano bubble water returns into the ozone oxidation reactor through a water discharge port of the micro-nano bubble generator;
the ozone bubbles and the ozone micro-nano bubbles are broken to generate a large amount of hydroxyl free radicals, the hydroxyl free radicals treat organic matters in the water sample to be treated, and meanwhile, the ultraviolet lamp post group and the catalyst group can improve the efficiency of generating hydroxyl free radicals by ozone;
(4) And filtering impurities from the fully oxidized water sample by using an activated carbon group, and discharging the filtered water sample from a purified water outlet at the upper part of the ozone oxidation reactor.
Compared with the prior art, the invention has the following beneficial effects:
1. the complex raw water is firstly subjected to membrane filtration by a membrane component and then enters an ozone oxidation reactor, one part of ozone generated by an ozone generating device directly enters the ozone oxidation reactor, the other part of the ozone enters the micro-bubble generator to form micro-nano bubbles with the diameter of less than 50 mu m, and the micro-nano bubbles are mixed with a water sample to be treated to form dissolved gas micro-nano bubble water which returns to the ozone oxidation reactor again; the ozone bubbles and the ozone micro-nano bubbles are broken to generate a large amount of hydroxyl free radicals, the hydroxyl free radicals treat organic matters in the water sample to be treated, and meanwhile, the ultraviolet lamp post group and the catalyst group can improve the efficiency of generating hydroxyl free radicals by ozone;
the bubbles generated by the micro-nano bubble generator have the characteristics of small particle size and large specific surface area, the ozone micro-nano bubbles have higher dissolved oxygen mass transfer efficiency, so that the gas-liquid mass transfer rate and concentration peak value of ozone in a water body can be greatly improved, the stay time of the ozone in the water can be effectively prolonged, ozone bubble water can be generated by combining the ozone with the ozone, a large number of hydroxyl free radicals can be generated by the ozone bubble cracking, and the oxidation capability of the ozone can be effectively enhanced to strengthen the removal effect of the ozone on nondegradable organic pollutants; compared with the prior art of directly introducing ozone for oxidation, the method can reduce the ozone addition amount, thereby improving the ozone utilization efficiency;
the device realizes common ozone bubbles and micro-nano ozone bubbles, can be used for generating the ozone proportion of the common ozone bubbles and the micro-nano ozone bubbles by adjusting the three-way valve, is mainly used for controlling the concentration of ozone entering the membrane component, and can relieve the pollution condition on the membrane by low-dosage ozone;
the device can selectively add common ozone or micro-nano ozone according to the water quality condition and can be used simultaneously, when the water quality is good, only common ozone bubbles can be introduced, micro-nano ozone is not required to be started, and the energy consumption is greatly reduced;
2. the ozone recycling pipe can recycle the ozone at the top part in the ozone oxidation reactor through the circulating air pump and then is added into the ozone oxidation reactor again to continue the oxidation reaction, so that the utilization rate of the ozone is improved;
3. the design of the water distribution device can uniformly pump the mixed ozone micro-nano bubble water into the ozone oxidation reactor, so that the ozone micro-nano bubbles are more dispersed, and the reaction efficiency is improved;
4. the top surface and the bottom surface of ultraviolet lamp pole group and catalyst group all are equipped with top baffle and end baffle, and top baffle and end baffle staggered distribution can change ozone and rise the flow route and be the S-shaped to increase the time of ozone in the water sample that waits to handle.
Drawings
FIG. 1 is a schematic diagram of a combined ozone catalytic oxidation water purification device according to the present invention;
FIG. 2 is a schematic view of a water distribution device according to the present invention;
FIG. 3 is a schematic view of a water distribution head according to the present invention;
in the figure: 1. 2 of a micro-nano bubble generator, 2 of an ozone oxidation reactor, 3 of a raw water tank, 4 of a membrane assembly, 5 of an ultraviolet lamp post group, 6 of a catalyst group, 7 of an active carbon group, 8 of a purified water outlet, 9 of a floating ball level gauge, 10 of an ozone tail gas destructor, 11 of a top baffle plate, 12 of a bottom baffle plate, 13 of an oxygen bottle, 14 of a gas dryer, 15 of an ozone generator, 16 of an ozone recovery tube, 17 of an ozone supply tube, 18 of a circulating air pump, 19 of a water distribution tube, 20 of a water distribution head.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings of the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
In the description of the invention, it should be understood that the terms "front," "rear," "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. The invention will be further described with reference to the drawings and examples.
As shown in fig. 1-3, the present embodiment discloses a combined ozone catalytic oxidation water purification device, which mainly comprises an ozone generating device, a micro-nano bubble generator 1, an ozone oxidation reactor 2 and a raw water tank 3. The ozone oxidation reactor 2 is a closed box body, and a transversely-distributed membrane assembly 4, an ultraviolet lamp post group 5, a catalyst group 6 and an activated carbon group 7 are sequentially arranged in the ozone oxidation reactor 2 from top to bottom. The membrane component 4, the ultraviolet lamp post group 5, the catalyst group 6 and the activated carbon group 7 divide the ozone oxidation reactor 2 into a membrane component area, a mixing area, an ultraviolet catalytic area, a mixing area, a solid phase catalytic area, a mixing area, an activated carbon area and a water outlet area from bottom to top in sequence. The membrane component 4 is of a tubular structure, a water inlet and a water outlet of the membrane component respectively extend to the outside of the ozone oxidation reactor 2, and a water supply port of the raw water tank 3 is communicated with the water inlet of the membrane component through a centrifugal pump. The side wall of the ozone oxidation reactor 2 is provided with a purified water outlet 8 near the top, the top of the ozone oxidation reactor 2 is provided with a floating ball liquid level meter 9 and an ozone tail gas destructor 10, the floating ball liquid level meter 9 is used for monitoring the water level condition in the ozone oxidation reactor 2, the use safety is ensured, and the ozone tail gas destructor 10 is used for destroying redundant unused ozone. The side wall of the ozone oxidation reactor 2 is also provided with a dosing tube, so that different types of oxidants or catalysts can be added in real time through the dosing tube according to different water quality conditions. The top surface and the bottom surface of the ultraviolet lamp post group 5 and the catalyst group 6 are respectively provided with a top baffle 11 and a bottom baffle 12, and the top baffles 11 and the bottom baffles 12 are distributed in a staggered way, so that the ascending flow route of ozone can be changed to be S-shaped, and the time of the ozone in a water sample to be treated is prolonged.
The ozone generating device comprises an oxygen bottle 13, a gas dryer 14 and an ozone generator 15 which are sequentially communicated, a pressure gauge and a pressure reducing valve are arranged on pipelines of the oxygen bottle 13 and the gas dryer 14, an ozone air supply port of the ozone generator 15 is respectively communicated with an air inlet of the micro-nano bubble generator 1 and an ozone air supply pipe 17 through a three-way valve, the other end of the ozone air supply pipe 17 is communicated with an air inlet, close to the bottom, of the side wall of the ozone oxidation reactor 2, for facilitating ozone mixing in the ozone oxidation reactor 2, an aeration head is arranged in the ozone oxidation reactor 2, and the aeration head is arranged at the air inlet. An ozone recovery pipe 16 is arranged on the side wall of the ozone oxidation reactor 2 near the top, the other end of the ozone recovery pipe 16 is communicated with the side wall of an ozone supply pipe 17, and a circulating air pump 18 is arranged on the ozone recovery pipe 16. In order to facilitate the observation of the ozone concentration, concentration detectors may be installed on the ozone recycling pipe 16 and the ozone supply pipe 17, respectively.
The water sucking mouth and the outlet of the micro-nano bubble generator 1 are communicated with the side wall of the ozone oxidation reactor 2, and for good ozone oxidation effect, the water sucking mouth of the micro-nano bubble generator 1 is located in the mixing area of the catalyst group 6 and the active carbon group 7, and the outlet of the micro-nano bubble generator 1 is located in the mixing area between the membrane component and the ultraviolet lamp post group 5, so that the water sucking mouth of the micro-nano bubble generator 1 is higher than the outlet thereof, and the dissolved gas micro-nano bubble water is ensured to be mixed into the liquid from the bottom of the ozone oxidation reactor 2. In order to uniformly throw the mixed dissolved gas micro-nano bubble water into the ozone oxidation reactor 2 so as to disperse the ozone micro-nano bubbles, a water distribution device is communicated with a water outlet of the micro-nano bubble generator 1 and vertically fixed on the inner side wall of the ozone oxidation reactor 2, the water distribution device comprises a plurality of water distribution pipes 19 which are vertically and horizontally staggered and communicated, a plurality of umbrella-shaped water distribution heads 20 are arranged on each water distribution pipe 19, and a plurality of water distribution holes are uniformly distributed on the top surface of each water distribution head 20.
The micro-nano bubble generator 1 mainly comprises a bubble atomizer, a pressure dissolved air tank, an air release tank, an air inlet control valve and a pressure gauge. The working process comprises the following steps: ozone enters the micro-nano bubble generator 1 through an air inlet of the micro-nano bubble generator, meanwhile, a water sample to be treated enters through a water suction port of the micro-nano bubble generator 1, ozone gas forms micro-nano ozone bubbles under the action of a bubble atomizer, micro-nano bubbles with the diameter of less than 50 mu m are generated, then dissolved air micro-nano bubble water is formed under the combined action of the bubble atomizer and a pressure dissolved air tank, and then the dissolved air micro-nano bubble water is released in an aeration mode through an air outlet matched with a water distribution device. In addition, be provided with manometer and air inlet control valve on the micro-nano bubble generator 1, the ozone concentration of accessible air inlet control valve control air inlet, manometer real-time supervision operating pressure.
Based on the combined ozone catalytic oxidation water purification device disclosed by the embodiment, the invention also discloses a raw water purification method capable of purifying raw water with high efficiency, which comprises the following steps:
(1) Opening an ozone oxidation reactor, filling a catalyst and activated carbon in a catalyst group and an activated carbon group, and starting an ultraviolet lamp post group for preheating;
(2) Pumping the wastewater to be treated into a water inlet of a membrane assembly from a raw water tank, enabling the wastewater to flow in the membrane assembly, enabling the wastewater to enter an ozone oxidation reactor after primary filtration of membrane filtration, and enabling the residual concentrated liquid to flow out through a water outlet to form membrane concentrated water;
when the wastewater to be treated in the ozone oxidation reactor is full, stopping water supply from the raw water tank;
(3) Starting an ozone generating device, wherein ozone generated by the ozone generating device firstly enters an ozone oxidation reactor, and when the concentration of the ozone in the ozone oxidation reactor is stable through an observation concentration detector, an ozone air supply port of the ozone generating device conveys a part of ozone to a micro-nano bubble generator through a three-way valve;
ozone enters the microbubble generator, meanwhile, a water sample to be treated in the ozone oxidation reactor enters the ozone oxidation reactor through a water suction port of the microbubble generator, ozone gas forms micro-nano bubbles with the diameter of less than 50 mu m in the microbubble generator, the micro-nano bubbles and the water sample to be treated are mixed to form dissolved air micro-nano bubble water, and the dissolved air micro-nano bubble water returns into the ozone oxidation reactor through a water discharge port of the micro-nano bubble generator;
the ozone bubbles and the ozone micro-nano bubbles are broken to generate a large amount of hydroxyl free radicals, the hydroxyl free radicals treat organic matters in the water sample to be treated, and meanwhile, the ultraviolet lamp post group and the catalyst group can improve the efficiency of generating hydroxyl free radicals by ozone;
(4) Filtering impurities from the fully oxidized water sample by using an activated carbon group, and discharging the filtered water sample from a purified water outlet at the upper part of the ozone oxidation reactor;
(5) The redundant ozone at the top in the ozone oxidation reactor can be recycled and re-added into the ozone oxidation reactor through the ozone recycling pipe under the action of the circulating air pump to continue the oxidation reaction, so that the utilization rate of the ozone is improved.
In the invention, the bubbles generated by the ozone micro-nano bubble generator have the characteristics of small particle size and large specific surface area, the ozone micro-nano bubbles have higher dissolved oxygen mass transfer efficiency, can greatly improve the gas-liquid mass transfer rate and concentration peak value of ozone in a water body, can effectively prolong the stay time of ozone in water, can generate ozone bubble water by being combined with ozone, can generate a large number of hydroxyl free radicals by breaking the ozone bubbles, and can effectively enhance the oxidization capability of the ozone to strengthen the removal effect of the ozone on nondegradable organic pollutants; compared with the prior art of directly introducing ozone for oxidation, the method has the advantages that the ozone bubbles and the ozone micro-nano bubbles are used for carrying out composite catalytic oxidation on organic matters, so that the ozone addition amount can be reduced, and the ozone utilization efficiency is improved.
Claims (7)
1. The combined ozone catalytic oxidation water purification device is characterized by comprising an ozone generation device, a micro-nano bubble generator, an ozone oxidation reactor and a raw water tank;
the ozone oxidation reactor is internally and sequentially provided with a transversely distributed membrane assembly, an ultraviolet lamp post group, a catalyst group and an active carbon group from bottom to top, a water inlet and a water outlet of the membrane assembly respectively extend to the outside of the ozone oxidation reactor, and a purified water outlet is arranged at the upper part of the ozone oxidation reactor;
the water supply port of the raw water tank is communicated with the water inlet of the membrane component, and the ozone gas supply port of the ozone generating device is respectively communicated with the gas inlet of the micro-nano bubble generator and the gas inlet of the ozone oxidation reactor;
the water suction port and the water discharge port of the micro-nano bubble generator are communicated with the side wall of the ozone oxidation reactor, and the water suction port of the micro-nano bubble generator is higher than the water discharge port of the micro-nano bubble generator.
2. The combined ozone catalytic oxidation water purification device according to claim 1, wherein the ozone generation device comprises an oxygen bottle, a gas dryer and an ozone generator which are sequentially communicated, and an ozone gas supply port of the ozone generator is respectively communicated with an air inlet of the micro-nano bubble generator and an ozone gas supply pipe through a three-way valve;
the side wall of the ozone oxidation reactor is provided with an ozone recovery pipe close to the top, the other end of the ozone recovery pipe is communicated with the side wall of the ozone supply pipe, and the ozone recovery pipe is provided with a circulating air pump.
3. The combined ozone catalytic oxidation water purification device according to claim 1, wherein the water suction port of the micro-nano bubble generator is located in the area between the catalyst group and the activated carbon group, and the water discharge port of the micro-nano bubble generator is located in the area between the membrane module and the ultraviolet lamp post group.
4. The combined ozone catalytic oxidation water purification device according to claim 1, wherein the water outlet of the micro-nano bubble generator is communicated with a water distribution device, the water distribution device is vertically fixed on the inner side wall of the ozone oxidation reactor and comprises a plurality of water distribution pipes which are vertically and horizontally staggered and communicated, each water distribution pipe is provided with a plurality of umbrella-shaped water distribution heads, and the top surfaces of the water distribution heads are uniformly distributed with a plurality of water distribution holes.
5. The combination ozone catalytic oxidation water purification device according to claim 4, wherein the top surface and the bottom surface of the ultraviolet lamp post group and the catalyst group are respectively provided with a top baffle and a bottom baffle, and the top baffles and the bottom baffles are distributed in a staggered manner.
6. The combined ozone catalytic oxidation water purification device according to any one of claims 1-5, wherein a float ball level gauge and an ozone tail gas destructor are arranged at the top of the ozone oxidation reactor.
7. A method for purifying raw water, characterized in that the combined ozone catalytic oxidation water purification device according to claim 1 is used for purifying raw water, comprising the following steps:
(1) Opening an ozone oxidation reactor, filling a catalyst and activated carbon in a catalyst group and an activated carbon group, and starting an ultraviolet lamp post group for preheating;
(2) Pumping the wastewater to be treated into a water inlet of a membrane assembly from a raw water tank, enabling the wastewater to flow in the membrane assembly, enabling a part of wastewater to enter an ozone oxidation reactor after membrane filtration, and enabling the rest liquid to flow out through a water outlet to form membrane concentrated water;
when the wastewater to be treated in the ozone oxidation reactor is full, stopping water supply from the raw water tank;
(3) Starting an ozone generating device, wherein ozone generated by the ozone generating device firstly enters an ozone oxidation reactor, and when the concentration of the ozone in the ozone oxidation reactor is stable, an ozone air supply port of the ozone generating device conveys a part of ozone to a micro-nano bubble generator;
ozone enters the microbubble generator, meanwhile, a water sample to be treated in the ozone oxidation reactor enters the ozone oxidation reactor through a water suction port of the microbubble generator, ozone gas forms micro-nano bubbles with the diameter of less than 50 mu m in the microbubble generator, the micro-nano bubbles and the water sample to be treated are mixed to form dissolved air micro-nano bubble water, and the dissolved air micro-nano bubble water returns into the ozone oxidation reactor through a water discharge port of the micro-nano bubble generator;
the ozone bubbles and the ozone micro-nano bubbles are broken to generate a large amount of hydroxyl free radicals, the hydroxyl free radicals treat organic matters in the water sample to be treated, and meanwhile, the ultraviolet lamp post group and the catalyst group can improve the efficiency of generating hydroxyl free radicals by ozone;
(4) And filtering impurities from the fully oxidized water sample by using an activated carbon group, and discharging the filtered water sample from a purified water outlet at the upper part of the ozone oxidation reactor.
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| CN117443197A (en) * | 2023-12-22 | 2024-01-26 | 天津工业大学 | Method for offline cleaning MBR hollow fiber membrane by utilizing ozone micro-nano bubbles |
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| CN117443197A (en) * | 2023-12-22 | 2024-01-26 | 天津工业大学 | Method for offline cleaning MBR hollow fiber membrane by utilizing ozone micro-nano bubbles |
| CN117443197B (en) * | 2023-12-22 | 2024-03-29 | 天津工业大学 | Method for offline cleaning MBR hollow fiber membrane by utilizing ozone micro-nano bubbles |
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