CN115784549A - A two-stage micro-nano ozone oxidation sludge treatment system and method - Google Patents

Abstract

The invention discloses a two-stage micro-nano ozone oxidation sludge treatment system and a two-stage micro-nano ozone oxidation sludge treatment method, which comprise an ozone generator, a primary micro-nano ozone oxidation treatment assembly, a secondary micro-nano ozone oxidation treatment assembly and a sedimentation tank, wherein the ozone generator generates ozone and is introduced into the primary micro-nano ozone oxidation treatment assembly, so that sludge in the primary micro-nano ozone oxidation treatment assembly is primarily oxidized by the ozone, the secondary micro-nano ozone oxidation treatment assembly is arranged behind the primary micro-nano ozone oxidation treatment assembly, the sludge primarily oxidized by the ozone enters the secondary micro-nano ozone oxidation treatment assembly and is secondarily oxidized, and then the sludge is precipitated in the sedimentation tank and then is respectively discharged out of the two-stage micro-nano ozone oxidation sludge treatment system in the forms of liquid and solid. The sludge after two times of oxidation realizes efficient disintegration and reduction, and the two-section micro-nano ozone oxidation sludge treatment system realizes the purpose of green treatment of the sludge.

Description

A two-stage micro-nano ozone oxidation sludge treatment system and method

technical field

The invention relates to the field of sludge treatment, and more specifically relates to a two-stage micro-nano ozone oxidation sludge treatment system and method.

Background technique

With the current sewage collection pipe network and sewage treatment facilities becoming more and more perfect, the scale of sewage treatment is increasing, and at the same time, a large amount of excess sludge is also produced. The main components of excess sludge are microorganisms discharged from the biochemical system, which are mainly organic matter and have a high water content. It is difficult for conventional dehydration equipment to achieve a high dehydration rate and the accumulation volume is large. In addition, if the excess sludge is not treated in time, it will ferment and produce malodorous gas, which will infiltrate into the soil and cause secondary pollution to the surrounding environment. Therefore, the on-site treatment of excess sludge can create favorable conditions for further sludge treatment.

At present, the most widely used sludge treatment process is still sanitary landfill, accounting for about 48% of all treatment processes. In the long run, sanitary landfill is an irreversible ultimate treatment method, which needs to occupy a large area of land resources, and sanitary landfill will produce landfill leachate. Leachate is a seriously polluted liquid. If the landfill site is improperly selected or the anti-seepage layer is aging, the leachate will seriously pollute the groundwater environment. Moreover, with the overall improvement of environmental protection requirements, more and more attention has been paid to the green treatment of excess sludge. Therefore, it is urgent to realize the green treatment of sludge.

Therefore, how to realize the green treatment of sludge has become a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

In view of this, the first object of the present invention is to provide a two-stage micro-nano ozone oxidation sludge treatment system, aiming at realizing green sludge treatment.

The second object of the present invention is to provide a two-stage micro-nano ozone oxidation sludge treatment method.

In order to realize above-mentioned first object, the present invention provides following scheme:

A two-stage micro-nano ozone oxidation sludge treatment system, including an ozone generator, a primary micro-nano ozone oxidation treatment component, a secondary micro-nano ozone oxidation treatment component, and a sedimentation tank, wherein,

The gas outlet of the ozone generator communicates with the inlets of the primary and secondary micro-nano ozone oxidation treatment components;

The feed port of the first-level micro-nano ozone oxidation treatment component is used to receive sludge, so as to perform a first-level ozone oxidation treatment on the sludge when the first-level micro-nano ozone oxidation treatment component is fed into ozone;

The feed port of the secondary micro-nano ozone oxidation treatment component is used to receive the sludge treated by the primary micro-nano ozone oxidation treatment component, so as to perform secondary ozone treatment on the sludge when the secondary micro-nano ozone oxidation treatment component is fed into ozone. oxidation treatment;

The feed port of the sedimentation tank is connected with the discharge port of the secondary micro-nano ozone oxidation treatment component to carry out sedimentation treatment on the sludge.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, the first-stage micro-nano ozone oxidation treatment assembly and the second-stage micro-nano ozone oxidation treatment assembly contain the same type of components;

The first-level micro-nano ozone oxidation treatment component includes a first-level ozone oxidation pool and a micro-nano bubble disperser, wherein,

The micro-nano bubble disperser is set inside the primary ozone oxidation pool;

The inlet of the micro-nano bubble disperser is connected with the ozone generator as the ozone inlet of the primary micro-nano ozone oxidation treatment component.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, the first-stage micro-nano ozone oxidation treatment assembly also includes a gas outlet connected between the inlet of the micro-nano bubble disperser and the gas outlet of the ozone generator. Jet mixer.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, the primary micro-nano ozone oxidation treatment component further includes a circulation pump connected to the primary ozone oxidation tank and the liquid inlet of the jet mixer.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, the flow rate of the circulation pump is determined according to the number of micro-nano bubble dispersers.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, a vibrating filter is also included to filter the large particle impurities in the concentrated sludge, and the concentrated sludge enters the vibrating filter from the feed port of the vibrating filter, The feed port of the first-stage ozone oxidation tank is connected with the feed port of the vibrating filter as the feed port of the first-stage micro-nano ozone oxidation treatment component.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, a lift pump is also included to lift the filtered sludge to the primary ozone oxidation tank, and the feed port of the lift pump and the output of the vibrating filter The inlet is connected, and the inlet of the primary ozone oxidation tank is connected with the outlet of the lift pump.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, a screw pump is also included, and the feed port of the screw pump communicates with the lower discharge port of the sedimentation tank.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, the sedimentation tank further includes an overflow weir, and the overflow weir is arranged on the top of the sedimentation tank for discharging the supernatant after sludge precipitation.

Preferably, in the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, a filter press is also included, the filter press is a plate and frame filter press, and the plate and frame filter press operates in an intermittent operation mode, and the plate and frame filter press The feed port of the screw pump is connected with the discharge port of the screw pump.

In order to achieve the above-mentioned second purpose, the present invention provides the following scheme:

A two-stage micro-nano ozone oxidation sludge treatment method, using any of the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, the micro-nano ozone oxidation sludge treatment method includes:

Step S1: The ozone generator continuously feeds the first preset dosage of ozone into the primary micro-nano ozone oxidation treatment component;

Step S2: Continuously transport the sludge with a preset concentration to the primary micro-nano ozone oxidation treatment component for a first preset time to perform primary ozone oxidation treatment;

Step S3: The ozone generator continuously feeds the second preset dosage of ozone into the secondary micro-nano ozone oxidation treatment component;

Step S4: Transport the continuous sludge after the first-level ozone oxidation treatment to the second-level micro-nano ozone oxidation treatment component to stay for a second preset time, so as to perform the second-level ozone oxidation treatment;

Step S5: The sludge after secondary ozone oxidation treatment is continuously transported to a sedimentation tank for sedimentation treatment.

Preferably, in the above micro-nano ozone oxidation sludge treatment method, during the sludge treatment process, step S1, step S2, step S3, step S4 and step S5 are in continuous operation state.

Preferably, in the above micro-nano ozone oxidation sludge treatment method, in step S5, the surface load of the sedimentation tank is 0.6-1.0 m ³ /(m ² ·h).

Preferably, in the above-mentioned micro-nano ozone oxidation sludge treatment method, after step S5, it also includes pumping the sludge at the bottom of the sedimentation tank to a filter press for filter press treatment by a screw pump.

Preferably, in the above micro-nano ozone oxidation sludge treatment method, the flow rate of the single micro-nano bubble disperser in the first-level micro-nano ozone oxidation treatment component and the second-level micro-nano ozone oxidation treatment component is 11.7-25.8 L/min.

Preferably, in the above micro-nano ozone oxidation sludge treatment method, the first preset dosage is 0.002-0.009g O ₃ /g TSS, the preset concentration is 15-25g/L, the second A preset time is 2-4h, the second preset dosage is 0.002-0.005g O ₃ /g TSS, and the second preset time is 2-4h.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is an example diagram of the technical scheme structural form of the two-stage micro-nano ozone oxidation sludge treatment system provided by the embodiment of the present invention;

Fig. 2 is an example diagram of the structural form of the technical solution of the two-stage micro-nano ozone oxidation treatment component provided by the embodiment of the present invention.

Among them, 100 is an ozone generator, 200 is a first-level micro-nano ozone oxidation treatment component, 201 is a first-level ozone oxidation pool, 202 is a micro-nano bubble disperser, 203 is a jet mixer, 204 is a circulation pump, and 300 is a second-level For micro-nano ozone oxidation treatment components, 400 is a sedimentation tank, 500 is a vibration filter, 600 is a lift pump, 700 is a screw pump, and 800 is a plate and frame filter press.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 1-2 in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making novel efforts fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the referred position or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

1 and 2, the present invention provides a two-stage micro-nano ozone oxidation sludge treatment system, including an ozone generator 100, a primary micro-nano ozone oxidation treatment component 200, a secondary micro-nano ozone oxidation treatment component 300 and a sedimentation tank 400, wherein the gas outlet of the ozone generator 100 communicates with the inlet of the primary micro-nano ozone oxidation treatment assembly 200, and the feed inlet of the primary micro-nano ozone oxidation treatment assembly 200 is used to receive sludge, When the first-level micro-nano ozone oxidation treatment component 200 is fed with ozone, the first-level ozone oxidation treatment is performed on the sludge, and the feed port of the second-level micro-nano ozone oxidation treatment component 300 is used to receive the first-level micro-nano ozone oxidation treatment component 200 The treated sludge is subjected to secondary ozone oxidation treatment when the secondary micro-nano ozone oxidation treatment component 300 is fed into the ozone, and the inlet of the sedimentation tank 400 is connected to the outlet of the secondary micro-nano ozone oxidation treatment component 300. The feed port is connected to settle the sludge.

The present invention sets the ozone generator 100 to generate ozone, and feeds into the first-level and second-level micro-nano ozone oxidation treatment components, so that the sludge in the first-level micro-nano ozone oxidation treatment component 200 is initially oxidized by ozone, and the first-level micro-nano ozone oxidation treatment component 200 is initially oxidized by ozone. After the oxidation treatment component 200, there is a secondary micro-nano ozone oxidation treatment component 300. The sludge initially oxidized by ozone enters the secondary micro-nano ozone oxidation treatment component 300 and is secondarily oxidized. The form of solid is respectively discharged from the two-stage micro-nano ozone oxidation sludge treatment system. After two times of oxidation, the sludge has achieved efficient disintegration and weight reduction, and the two-stage micro-nano ozone oxidation sludge treatment system has achieved the purpose of sludge green treatment.

It can be understood that, in order to ensure the sedimentation effect of the sludge, the above-mentioned sedimentation tank 400 is a vertical flow sedimentation tank but is not limited to a vertical flow sedimentation tank. It can be understood that the first-level micro-nano ozone oxidation treatment assembly 200 and the second-level micro-nano ozone oxidation treatment assembly 300 contain the same type of components, and the second-level micro-nano ozone oxidation treatment assembly 300 is the same as the first-level micro-nano ozone oxidation treatment assembly 200 The treated sludge is subjected to secondary treatment to achieve better sludge treatment effect. Correspondingly, the ozone oxidation pool included in the secondary micro-nano ozone oxidation treatment component 300 is a secondary ozone oxidation pool. The first-level micro-nano ozone oxidation treatment component 200 includes a first-level ozone oxidation tank 201 and a micro-nano bubble disperser 202. The sludge is disintegrated in the first-level ozone oxidation tank 201, and at the same time, the organic matter in the sludge is oxidized and dissolved, and the micro-nano bubbles Disperser 202 is arranged in the inside of primary ozone oxidation tank 201, and the inlet of micro-nano bubble disperser 202 communicates with ozone generator 100 as the air inlet of primary micro-nano ozone oxidation treatment assembly 200, and the ozone that ozone generator 100 produces Enter the primary ozone oxidation pool 201 through the inlet of the micro-nano bubble disperser 202 , and diffuse in the primary ozone oxidation pool 201 through the micro-nano bubble disperser 202 .

The primary micro-nano ozone oxidation treatment assembly 200 also includes a jet mixer 203 connected between the inlet of the micro-nano bubble disperser 202 and the gas outlet of the ozone generator 100 . Ozone enters the jet mixer 203 through the gas outlet of the ozone generator 100, and then enters the micro-nano bubble disperser 202 through the liquid outlet of the jet mixer 203. The micro-nano bubble disperser 202 is used to diffuse the mixed liquid rich in ozone.

In order to optimize the above technical solution, the primary micro-nano ozone oxidation treatment assembly 200 further includes a circulating pump 204 connected to the liquid inlet of the primary ozone oxidation pool 201 and the jet mixer 203 . The mixed liquid in the ozone generator 100 enters the circulation pump 204 through the liquid inlet of the circulation pump 204, and then is pumped into the jet mixer 203 through the liquid outlet of the circulation pump 204, and is mixed with the ozone in the jet mixer 203 by the jet. The liquid outlet of the mixer 203 enters the micro-nano bubble disperser 202, and then realizes the first-stage ozone oxidation treatment of the sludge.

Further, the flow rate of the circulation pump 204 is determined according to the number of micro-nanobubble dispersers 202. When the number of micro-nanobubble dispersers 202 is the first preset number, the flow rate of the circulation pump 204 is the first preset flow rate. When the number of nanobubble dispersers 202 is the second preset number, the flow rate of the circulation pump 204 is the second preset flow rate. That is, there is a positive correlation between the preset quantity and the preset flow.

In order to optimize the above-mentioned technical scheme, the primary micro-nano ozone oxidation treatment module 200 also includes a vibrating filter 500, which is a slanted screen vibrating filter to filter large particles of impurities in the concentrated sludge to avoid impurities from clogging the subsequent Pipelines for processing units. The concentrated sludge enters the vibrating filter 500 from the feed port of the vibrating filter 500, and enters the primary ozone oxidation tank 201 by the discharge port of the vibrating filter 500 after vibrating and filtering through the vibrating filter 500, and the primary ozone oxidation tank 201 The feed port serves as the feed port of the primary micro-nano ozone oxidation treatment assembly 200 and communicates with the discharge port of the vibrating filter 500 .

In order to optimize the above technical solution, the primary micro-nano ozone oxidation treatment module 200 also includes a lift pump 600 , and the lift pump 600 lifts the sludge filtered by the vibrating filter 500 to the primary ozone oxidation tank 201 . The lift pump 600 is arranged between the vibrating filter 500 and the primary micro-nano ozone oxidation treatment assembly 200, the feed port of the lift pump 600 communicates with the discharge port of the vibrating filter 500, and the feed port of the primary ozone oxidation pool 201 The feed port of the primary micro-nano ozone oxidation treatment component 200 communicates with the discharge port of the lift pump 600 .

In order to optimize the above-mentioned technical scheme, the first-level micro-nano ozone oxidation treatment assembly 200 also includes a screw pump 700, the feed port of the screw pump 700 is connected with the lower discharge port of the sedimentation tank 400, and the sludge mixed solution after oxidation reduction is in the The mud-water separation is completed in the settling tank 400 , and the settled sludge enters the screw pump 700 through the lower outlet of the settling tank 400 .

Further, the settling tank 400 also includes an overflow weir, the overflow weir is arranged on the top of the settling tank 400, and the sludge mixed solution after oxidation and weight reduction is discharged from the overflow weir for two stages after the sedimentation in the settling tank 400. Micro-nano ozone oxidation sludge treatment system.

In order to optimize the above-mentioned technical scheme, the first-level micro-nano ozone oxidation treatment assembly 200 also includes a filter press, the filter press is a plate and frame filter press 800, and the plate and frame filter press 800 operates in an intermittent operation mode, according to the sludge in the sedimentation tank The feed port of the plate and frame filter press 800 is connected with the discharge port of the screw pump 700. The sludge is dehydrated inside the plate and frame filter press 800, and the treated sludge mixture is discharged from the sludge treatment system through the plate and frame filter press 800 in the form of solid and liquid, and the overall volume of the remaining sludge is further reduced. Small.

The present invention provides a two-stage micro-nano ozone oxidation sludge treatment method, using the above-mentioned two-stage micro-nano ozone oxidation sludge treatment system, the two-stage micro-nano ozone oxidation sludge treatment method includes:

Step S1: The ozone generator 100 continuously feeds the first preset dosage of ozone into the primary micro-nano ozone oxidation treatment assembly 200;

Step S2: Continuously transport the sludge with a preset concentration to the primary micro-nano ozone oxidation treatment component 200 for a first preset time to perform primary ozone oxidation treatment;

Step S3: The ozone generator 100 continuously feeds the second preset dosage of ozone into the secondary micro-nano ozone oxidation treatment assembly 300;

Step S4: Continuously convey the sludge after the primary ozone oxidation treatment to the secondary micro-nano ozone oxidation treatment component 300 for a second preset time to perform the secondary ozone oxidation treatment;

Step S5: The sludge after the secondary ozone oxidation treatment is continuously transported to the sedimentation tank 400 for sedimentation treatment.

In order to optimize the above technical solution, after step S5, the sludge at the bottom of the sedimentation tank 400 is pumped to the plate and frame filter press 800 by the screw pump 700 for pressure filtration treatment.

Specifically, in step S5, the surface load of the sedimentation tank 400 is 0.6-1.0 m ³ /(m ² ·h).

Specifically, the flow rate of a single micro-nano bubble disperser 202 in the primary micro-nano ozone oxidation treatment assembly 200 and the secondary micro-nano ozone oxidation treatment assembly 300 is 11.7-25.8 L/min.

Specifically, the first preset dosage is 0.002-0.009g O ₃ /g TSS, the preset concentration is 15-25g/L, and/or the first preset time is 2-4h, and the second preset dosage The amount is 0.002-0.005g O ₃ /g TSS, and the second preset time is 2-4h. The above-mentioned first preset dosage, preset concentration, first preset time, second preset dosage and second preset time are selected according to specific needs, as long as the values within the above range are within the range of the present invention within the scope of protection.

The present invention has the following advantages:

(1) Green treatment of sludge is safe and environmentally friendly;

(2) High sludge treatment efficiency;

(3) Strong practicability.

In order to further illustrate the present invention, a system for enriching anammox bacteria provided by the present invention will be described in detail below in conjunction with examples, but it should not be understood as limiting the protection scope of the present invention.

Example 1

The two-stage micro-nano ozone oxidation sludge treatment system shown in Figure 1 is adopted, the system includes an ozone generator 100, a first-level micro-nano ozone oxidation treatment assembly 200, a first-level ozone oxidation tank 201, and a micro-nano bubble disperser 202, Jet mixer 203, circulation pump 204, sedimentation tank 400, vibration filter 500, lift pump 600, screw pump 700, plate and frame filter press 800.

The concentrated sludge is pumped into the sludge treatment system from the sludge concentration tank through the screw pump 700, and the concentration of the sludge entering the system is controlled at 15-25g/L. The hydraulic retention time of the primary ozone oxidation tank 201 is 5h, and the corresponding ozone The dosage is 0.008g O ³ /g TSS; the water residence time of the secondary ozone oxidation tank is 3h, and the corresponding ozone dosage is 0.004g O ³ /gTSS; the ozone is generated by the ozone generator 100, and the primary micro The nano-ozone oxidation treatment assembly 200 is composed of a primary ozone oxidation tank 201, a circulation pump 204, a jet mixer 203 and a micro-nano bubble disperser 202, wherein the flow rate of the circulation pump 204 is determined according to the number of micro-nano-bubble dispersers 202, and a single micro-nano bubble disperser 202 The flow rate of the nanobubble disperser 202 is 15L/min; the sedimentation tank 400 is a vertical flow sedimentation tank with a surface load of 0.8m ³ /(m ² h), the supernatant flows out from the top overflow weir, and the sludge It is deposited at the bottom and transported to the filter press by the screw pump 700; the plate and frame filter press 800 adopts intermittent operation mode, and is automatically started and stopped according to the mud level of the sedimentation tank 400. Continuously operating under this condition, the sludge entering the system can achieve a 70-80% sludge reduction effect.

Example 2

The two-stage micro-nano ozone oxidation sludge treatment system shown in Figure 1 is adopted, the system includes an ozone generator 100, a first-level micro-nano ozone oxidation treatment assembly 200, a first-level ozone oxidation tank 201, and a micro-nano bubble disperser 202, Jet mixer 203, circulation pump 204, sedimentation tank 400, vibration filter 500, lift pump 600, screw pump 700, plate and frame filter press 800.

Thickened sludge is pumped into the sludge reduction system from the sludge thickening tank through the screw pump 700, and the sludge concentration entering the system is controlled at 30-35g/L, and the hydraulic retention time of the primary ozone oxidation tank 201 is 5h, corresponding The dosage of ozone is 0.008g O ³ /g TSS; the water residence time of the secondary ozone oxidation tank is 3h, and the corresponding ozone dosage is 0.004g O ³ /gTSS; the ozone is generated by the ozone generator 100, the first The micro-nano ozone oxidation treatment assembly 200 is composed of a primary ozone oxidation pool 201, a circulation pump 204, a jet mixer 203 and a micro-nano bubble disperser 202, wherein the flow rate of the circulation pump 204 is determined according to the number of micro-nano bubble dispersers 202, and a single micro-nano The flow rate of the nanobubble disperser 202 is 15L/min; the sedimentation tank 400 is a vertical flow sedimentation tank with a surface load of 0.8m ³ /(m ² h), the supernatant flows out from the top overflow weir, and the sludge It is deposited at the bottom and transported to the filter press by the screw pump 700; the plate and frame filter press 800 adopts intermittent operation mode, and is automatically started and stopped according to the mud level of the sedimentation tank 400. Continuously operating under this condition, the sludge entering the system can achieve a 60-70% sludge reduction effect.

Example 3

The two-stage micro-nano ozone oxidation sludge treatment system shown in Figure 1 is adopted, the system includes an ozone generator 100, a first-level micro-nano ozone oxidation treatment assembly 200, a first-level ozone oxidation tank 201, and a micro-nano bubble disperser 202, Jet mixer 203, circulation pump 204, sedimentation tank 400, vibration filter 500, lift pump 600, screw pump 700, plate and frame filter press 800.

Thickened sludge is pumped into the sludge reduction system from the sludge thickening tank through the screw pump 700, and the sludge concentration entering the system is controlled at 15-25g/L, and the hydraulic retention time of the primary ozone oxidation tank 201 is 3h, corresponding The ozone dosage is 0.008g O ³ /g TSS; the water flow residence time of the secondary ozone oxidation tank is 2h, and the corresponding ozone dosage is 0.004g O 3 /gTSS; the ozone is produced by the ozone generator 100, and the primary micro The nano-ozone oxidation treatment assembly 200 is composed of an ozone oxidation tank 201, a circulation pump 204, a jet mixer 203 and a micro-nano bubble disperser 202, wherein the flow rate of the circulation pump 204 is determined according to the number of micro-nano-bubble dispersers 202, and a single micro-nano-bubble disperser The flow rate of the device 202 is 15L/min; the sedimentation tank 400 is a vertical flow sedimentation tank, the surface load is 1.0m ³ /(m ² ·h), the supernatant flows out from the overflow weir at the top, and the sludge is deposited at the bottom , and transported to the filter press through the screw pump 700; the plate and frame filter press 800 adopts an intermittent operation mode, and is automatically started and stopped according to the mud level of the sedimentation tank 400. Continuously operating under this condition, the sludge entering the system can achieve a sludge reduction effect of 60-67%.

It should be noted that the method provided by the present invention can be used in the field of sludge treatment or other fields, and other fields are any fields except the field of sludge treatment. The above is only an example, and does not limit the application fields of the two-stage micro-nano ozone oxidation sludge treatment system and the micro-nano ozone oxidation sludge treatment method provided by the present invention.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

In the description of this specification, descriptions with reference to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment of the present invention. In an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments do not exhaust all details nor limit the invention to only specific embodiments. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims (16)

1. A two-stage micro-nano ozone oxidation sludge treatment system, characterized in that it includes an ozone generator (100), a first-level micro-nano ozone oxidation treatment component (200), and a second-level micro-nano ozone oxidation treatment component (300) and sedimentation tank (400), wherein, The gas outlet of the ozone generator (100) is in communication with the inlets of the primary micro-nano ozone oxidation treatment assembly (200) and the secondary micro-nano ozone oxidation treatment assembly (300); The feed inlet of the first-level micro-nano ozone oxidation treatment component (200) is used to receive sludge, so as to perform first-level ozone oxidation on the sludge after the first-level micro-nano ozone oxidation treatment component (200) is fed with ozone deal with; The feed inlet of the secondary micro-nano ozone oxidation treatment component (300) is used to receive the sludge treated by the primary micro-nano ozone oxidation treatment component (200), so that it can be processed in the secondary micro-nano ozone oxidation treatment After the component (300) is fed with ozone, the sludge is subjected to secondary ozone oxidation treatment; The feed port of the sedimentation tank (400) communicates with the discharge port of the secondary micro-nano ozone oxidation treatment assembly (300), so as to carry out sedimentation treatment on the sludge. 2. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 1, characterized in that, The first-level micro-nano ozone oxidation treatment assembly (200) includes a first-level ozone oxidation pool (201) and a first-level micro-nano bubble disperser (202), wherein, The feed port of the primary ozone oxidation tank (201) is used to receive sludge; The first-level micro-nano bubble disperser (202) is arranged inside the first-level ozone oxidation tank (201); the entrance of the first-level micro-nano bubble disperser (202) serves as the first-level micro-nano ozone oxidation The ozone inlet of processing assembly (200) communicates with the gas outlet of described ozone generator (100); The secondary micro-nano ozone oxidation treatment assembly (300) includes a secondary ozone oxidation pool (301) and a secondary micro-nano bubble disperser (302), wherein, The feed port of the secondary ozone oxidation tank (301) is communicated with the discharge port of the primary ozone oxidation tank (201), and the discharge port of the secondary ozone oxidation tank (301) is connected with the settling tank (400) feed port is communicated; The secondary micro-nano bubble disperser (302) is arranged in the inside of the secondary ozone oxidation tank (301); the entrance of the secondary micro-nano bubble disperser (302) serves as the secondary micro-nano ozone oxidation The ozone inlet of the processing component (300) communicates with the gas outlet of the ozone generator (100). 3. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 2, characterized in that, the first-stage micro-nano ozone oxidation treatment assembly (200) also includes a micro-nano bubble disperser (202 ) inlet and the jet mixer (203) between the gas outlet of the ozone generator (100). 4. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 3, characterized in that, the first-level micro-nano ozone oxidation treatment assembly (200) also includes a tank connected to the first-level ozone oxidation tank (201 ) and the circulation pump (204) of the liquid inlet of the jet mixer (203). 5. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 4, characterized in that the flow rate of the circulation pump (204) is determined according to the number of the micro-nano bubble dispersers (202). 6. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 2, is characterized in that, also comprises a vibration filter (500), to filter the large particle impurities in the concentrated sludge, the concentrated sludge is obtained from the The feed port of the vibrating filter (500) enters the vibrating filter (500), and the feed port of the primary ozone oxidation tank (201) is used as the feed port of the primary micro-nano ozone oxidation treatment assembly (200) It communicates with the outlet of the vibrating filter (500). 7. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 6 is characterized in that it also includes a lift pump (600) to promote the filtered sludge to the first-level ozone oxidation tank (201), The feed port of the lift pump (600) is communicated with the discharge port of the vibration filter (500), and the feed port of the primary ozone oxidation tank (201) is used as the primary micro-nano ozone oxidation treatment. The feed port of the assembly (200) communicates with the discharge port of the lift pump (600). 8. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 1 is characterized in that, it also comprises a screw pump (700), and the feeding port of the screw pump (700) is connected with that of the settling tank (400). The lower outlet is connected. 9. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 8, characterized in that, the settling tank (400) also includes an overflow weir, and the overflow weir is arranged in the settling tank (400 ), used to discharge the supernatant after sludge precipitation. 10. The two-stage micro-nano ozone oxidation sludge treatment system according to claim 9, further comprising a filter press, the filter press is a plate and frame filter press (800), and the plate and frame The filter press (800) operates intermittently, and the feed port of the plate and frame filter press (800) communicates with the discharge port of the screw pump (700). 11. A two-stage micro-nano ozone oxidation sludge treatment method, characterized in that, using the two-stage micro-nano ozone oxidation sludge treatment system as claimed in any one of claims 1 to 10, the two-stage micro-nano Ozone oxidation sludge treatment methods include: Step S1: The ozone generator (100) continuously feeds the first preset dosage of ozone into the primary micro-nano ozone oxidation treatment component (200); Step S2: Continuously transport the sludge with a preset concentration to the primary micro-nano ozone oxidation treatment component (200) for a first preset time to perform primary ozone oxidation treatment; Step S3: The ozone generator (100) continuously feeds the second preset dosage of ozone into the secondary micro-nano ozone oxidation treatment assembly (300); Step S4: Continuously transport the sludge after the primary ozone oxidation treatment to the secondary micro-nano ozone oxidation treatment component (300) for a second preset time, so as to perform the secondary ozone oxidation treatment; Step S5: The sludge after secondary ozone oxidation treatment is continuously transported to a sedimentation tank (400) for sedimentation treatment. 12. The method according to claim 11, characterized in that, during the sludge treatment process, the step S1, the step S2, the step S3, the step S4 and the step S5 are in a continuous operation state . 13. The method according to claim 12, characterized in that, in the step S5, the surface load of the sedimentation tank (400) is 0.6-1.0 m ³ /(m ² ·h). 14. The method according to claim 13, characterized in that, after the step S5, further comprising pumping the sludge at the bottom of the sedimentation tank (400) to a filter press for pressure filtration treatment through a screw pump (700). 15. The method according to claim 14, characterized in that, the single micro-nano bubble disperser in the first-level micro-nano ozone oxidation treatment assembly (200) and the second-level micro-nano ozone oxidation treatment assembly (300) The flow rate of (202) is 11.7-25.8L/min. 16. The method according to any one of claims 11 to 15, wherein the first preset dosage is 0.002-0.009g O ₃ /g TSS, and the preset concentration is 15-25g /L, the first preset time is 2-4h, the second preset dosage is 0.002-0.005gO ₃ /g TSS, and the second preset time is 2-4h.

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