CN115557650A - Mobile device and method for treating soluble organic sewage - Google Patents

Abstract

The invention relates to a mobile device and a method for treating soluble organic sewage, the device comprises a mobile platform, a sewage collecting pool, an adsorption column, an advanced oxidation reactor and a membrane filtering component which are all arranged on the platform, wherein the sewage collecting pool, the adsorption column and the membrane filtering component are sequentially connected through a first pipeline to form an adsorption-membrane filtering module, the sewage collecting pool, the advanced oxidation reactor and the membrane filtering component are sequentially connected through a second pipeline to form an advanced oxidation-membrane filtering module, the sewage collecting pool, the adsorption column, the advanced oxidation reactor and the membrane filtering component are sequentially connected through a third pipeline to form an adsorption-advanced oxidation-membrane filtering module, and the sewage collecting pool, the advanced oxidation reactor, the adsorption column and the membrane filtering component are sequentially connected through a fourth pipeline to form an advanced oxidation-adsorption-membrane filtering module. Compared with the prior art, the device has wide application range, and can realize standard discharge or resource utilization of sewage through selection of the treatment module.

Description

A mobile device and method for treating dissolved organic sewage

technical field

The invention belongs to the technical field of wastewater treatment, and relates to a mobile device and method for treating dissolved organic sewage.

Background technique

Dissolved organic matter (DOM) in industrial wastewater is the main factor restricting the treatment efficiency of wastewater treatment devices. At the same time, there are various types of industrial wastewater from a wide range of sources. Among them, cleaning wastewater is the wastewater produced by cleaning instruments and equipment in the process of industrial production. It not only has complex components, variable properties, high concentration of organic matter (COD>2000mg/L), low biodegradability, and most of the organic matter is DOM. , is difficult to deal with. For example, oil cleaning wastewater, beverage cleaning wastewater, dairy product cleaning wastewater, detergent cleaning wastewater, electroplating cleaning wastewater and gas turbine cleaning wastewater, etc. If this type of wastewater is discharged directly into the existing sewage treatment system without treatment, it will lead to an overload of the treatment system, a large number of microorganisms will die, the system will collapse, and the wastewater will not be fully utilized. At present, the treatment technology for continuous and large-volume sewage has gradually matured, but less attention has been paid to discontinuous and dispersed sewage (such as cleaning wastewater, etc.). The volume of this kind of sewage is small, and the generation time is random. If a systematic treatment facility is built according to the maximum pollution load, it will lead to a sharp increase in economic costs. The current sewage treatment methods mostly use biological treatment. This type of method is suitable for continuously produced sewage with high biodegradability, but it is not suitable for sewage with poor biodegradability such as pesticide wastewater and cleaning wastewater, and it is even more difficult to use Treatment of discontinuous wastewater. In addition, the existing treatment process still has problems such as long process flow and large floor area.

In recent years, advanced oxidation methods such as Fenton oxidation, photocatalytic oxidation, and membrane separation technology for the treatment of DOM in industrial wastewater have received extensive attention. Fenton's advanced oxidation method has a strong ability to degrade dissolved organic matter, but for wastewater with high concentration of COD, there is a problem of high chemical consumption. Photocatalytic oxidation technology has the characteristics of mild reaction conditions and strong oxidation ability. It can effectively carry out photocatalytic reaction in the treatment of dye wastewater, surfactant, pesticide wastewater, oily wastewater, polycyclic aromatic hydrocarbons and other wastewater to convert It is an inorganic small molecule to achieve the purpose of complete harmlessness, but for wastewater with high concentration of suspended solids or high chroma, it is not conducive to light transmission and affects the effect of photocatalytic reaction. Membrane separation technology has the characteristics of good separation effect and simple process structure, but organic matter in wastewater can easily cause membrane fouling, resulting in a decrease in membrane flux and rejection.

Contents of the invention

The purpose of the present invention is exactly in order to provide a kind of mobile device and method for processing dissolved organic sewage, to overcome at least one of the following defects in the prior art: 1) advanced oxidation methods such as Fenton oxidation, persulfate and sodium hypochlorite are processed For high-concentration COD wastewater, the consumption of chemicals is large, and the treatment effect is unstable; 2) When photocatalytic oxidation technology is used to treat wastewater with high chroma, light is not easy to pass through, and the photocatalytic reaction effect is poor; 3) Membrane separation technology is used to treat high-concentration wastewater. In the case of organic wastewater, it is easy to cause membrane fouling and shorten the life of the membrane; 4) The existing treatment process of non-continuous and dispersed sewage is long and the treatment device occupies a large area.

The purpose of the present invention can be achieved through the following technical solutions:

One of the technical solutions of the present invention provides a mobile device for treating dissolved organic sewage, which includes a movable platform and a sewage collection tank, an adsorption column, an advanced oxidation reactor and a membrane all arranged on the platform. The filtration assembly, the sewage collection tank, the adsorption column and the membrane filtration assembly are connected in sequence through a first pipeline to form an adsorption-membrane filtration module, the sewage collection tank, the advanced oxidation reactor and the membrane The filter components are connected in sequence through the second pipeline to form an advanced oxidation-membrane filtration module, and the sewage collection tank, the adsorption column, the advanced oxidation reactor and the membrane filtration component are connected in sequence through a third pipeline to form a The adsorption-advanced oxidation-membrane filtration module, the sewage collection tank, the advanced oxidation reactor, the adsorption column and the membrane filtration module are connected in sequence through a fourth pipeline to form an advanced oxidation-adsorption-membrane filtration module.

Further, a first sewage pump is provided at the water outlet of the sewage collection tank, and the first sewage pump transports the sewage in the sewage collection tank to the adsorption column or the advanced oxidation reactor.

Further, the advanced oxidation-adsorption-membrane filtration module also includes a second sewage pump arranged between the adsorption column and the advanced oxidation reactor, and the second sewage pump will come from the advanced oxidation reactor The sewage is transported to the adsorption column.

Further, the mobile device also includes an intermediate water tank, the sewage treated by the adsorption column or the advanced oxidation reactor first flows through the intermediate water tank, and then enters the membrane filtration module.

Furthermore, the membrane filtration assembly includes a security filter and a membrane filter connected to each other, the security filter is connected to the intermediate water tank, and a third filter is provided between the security filter and the intermediate water tank. A sewage pump is provided with a high-pressure pump between the security filter and the membrane filter.

Furthermore, the membrane of the membrane filter is a nanofiltration membrane or an ultrafiltration membrane.

Further, the interior of the adsorption column is filled with activated carbon, activated coke or resin.

Further, the interior of the advanced oxidation reactor is provided with an ultraviolet light irradiation lamp and a photothermal coating.

The second technical solution of the present invention provides a method for treating dissolved organic sewage. The method is carried out by using the above-mentioned mobile device, and the method includes the following four processes:

Adsorption-membrane filtration process: the sewage to be treated in the sewage collection tank is introduced into the adsorption column by the first sewage pump, and the sewage treated by the adsorption column is introduced into the membrane filtration through the intermediate water tank, the third sewage pump, the security filter and the high-pressure pump in sequence device;

Advanced oxidation-membrane filtration process: the sewage to be treated in the sewage collection tank is introduced into the advanced oxidation reactor by the first sewage pump, and the oxidation reaction is carried out after adding the oxidizing agent, and the obtained liquid flows through the intermediate water tank, the third sewage pump, the security guard in sequence Filter and high pressure pump enter membrane filter;

Adsorption-Advanced Oxidation-Membrane Filtration Process: The sewage to be treated in the sewage collection tank is introduced into the adsorption column by the first sewage pump, the liquid after adsorption and filtration is introduced into the advanced oxidation reactor, and the oxidation reaction is carried out after adding the oxidizing agent, and the obtained liquid Enter the membrane filter through the intermediate water tank, the third sewage pump, the security filter and the high-pressure pump in turn;

Advanced oxidation-adsorption-membrane filtration process: the sewage to be treated in the sewage collection tank is introduced into the advanced oxidation reactor by the first sewage pump, and the oxidation reaction is carried out after adding the oxidizing agent, and the obtained liquid is introduced into the adsorption column by the second sewage pump. The filtered liquid flows through the intermediate water tank, the third sewage pump, the security filter and the high-pressure pump into the membrane filter in sequence.

Further, when the sewage to be treated is subjected to adsorption treatment, the sewage enters the adsorption column from the top of the adsorption column, and flows out of the adsorption column from the bottom of the adsorption column.

Further, advanced oxidation is Fenton oxidation or photocatalytic oxidation.

Based on the device of the present invention, the three technologies of adsorption, advanced oxidation and membrane filtration can be used in combination, and the above four processes can be flexibly combined to achieve efficient treatment of high-concentration dissolved organic sewage, and the types of adsorbents in the adsorption column and advanced There are many options for oxidation. According to the needs of sewage treatment, the device can realize the discharge of sewage up to the standard or reuse in the plant, and truly realize the efficient treatment and resource utilization of sewage.

The present invention uses adsorption, advanced oxidation and membrane filtration technologies in combination, and can realize the advantages and disadvantages of the three technologies of advanced oxidation, photocatalytic oxidation technology and membrane separation technology, thereby improving the treatment efficiency.

When performing the adsorption-membrane filtration process or the Fenton oxidation-membrane filtration process, the ability of the adsorbent in the adsorption column to adsorb or Fenton oxidation to degrade DOM can be used to reduce the problem of membrane fouling of the subsequent membrane filtration components.

When the adsorption-Fenton oxidation-membrane filtration process is carried out, the pre-treatment of the adsorption greatly improves the treatment efficiency of the Fenton oxidation step, while reducing the amount of Fenton reagent used, and also reducing the subsequent membrane filtration components. membrane fouling problem.

When the adsorption-photocatalytic oxidation-membrane filtration process is carried out, the concentration of suspended solids or chromaticity of the wastewater after adsorption treatment is reduced, which is conducive to the transmission of light in the subsequent photocatalytic oxidation process, thereby improving the photocatalytic reaction effect.

When the advanced oxidation-adsorption-membrane filtration process is carried out, the advanced oxidation can degrade a large amount of organic matter in the wastewater, the adsorption method can further remove the residual organic matter in the wastewater, and the membrane filtration can further remove the substances with larger molecular weights in the sewage to achieve discharge standards the goal of.

The invention develops a multi-mode combined process integrated treatment device for high-concentration soluble organic sewage, which can be applied to different types of non-continuous organic waste water, and has the characteristics of being movable, occupying a small area and having a wide application range.

Compared with the prior art, the present invention has the following advantages:

(1) The components such as the sewage collection tank, adsorption column, advanced oxidation reactor and membrane filtration module of the device of the present invention are all arranged on a movable platform, so the device has the characteristics of integration and mobility, and is suitable for small flow, intermittent The device can realize the single-stage treatment, multi-stage treatment and advanced treatment of sewage, and at the same time, through the coupling treatment of physical and chemical means, it can realize the efficient removal of high and low concentrations of dissolved organic matter in sewage;

(2) The device of the present invention is provided with an adsorption-membrane filtration module, an advanced oxidation-membrane filtration module, an adsorption-advanced oxidation-membrane filtration module and an advanced oxidation-adsorption-membrane filtration module, before performing membrane filtration, the sewage is adsorbed, advanced Pretreatment such as oxidation or the coupling of the two can reduce the pollution degree of the membrane, prolong the service life of the membrane, and improve the treatment efficiency; according to the characteristics of the organic matter, the coupling method of the adsorption method and the advanced oxidation method can be selectively adjusted to be suitable for Different types of sewage, to achieve efficient removal of organic matter in sewage;

(3) The device of the present invention can select a treatment module and a corresponding treatment method according to the treatment requirements to achieve the effect of efficient removal of organic matter, thereby realizing the discharge of sewage up to the standard, or to carry out recycling and resource utilization in the plant according to the actual situation;

(4) the inventive method processing technological process is simple, and used device floor space is little;

(5) Compared with the waste water of high-concentration COD treated by advanced oxidation methods such as using independent Fenton oxidation, the used medicament consumption of the inventive method is little, and the treatment effect is more stable;

(6) The present invention can avoid the problems that the light is difficult to pass through and the photocatalytic reaction effect is poor when the photocatalytic oxidation technology is used alone to treat wastewater with high chroma.

Description of drawings

Fig. 1 is the structural representation of device of the present invention;

Fig. 2 is the schematic diagram of the inlet and outlet water of the adsorption column of the present invention;

Fig. 3 is the water inlet and outlet schematic diagram of advanced oxidation reactor of the present invention;

Fig. 4 is the water inlet and outlet schematic diagram of membrane filter of the present invention;

Fig. 5 is the figure of influence of embodiment 2 Fenton's reagent dosage on COD removal rate;

Fig. 6 is the impact diagram of embodiment 2 coagulant on chromaticity, turbidity removal effect;

Fig. 7 is the surface view of the membrane after water treatment in Comparative Example 2 and Example 2.

Instructions for marks in the figure:

1-Sewage collection tank, 2-Adsorption column, 3-Advanced oxidation reactor, 4-UV irradiation lamp, 5-Photothermal coating, 6-Intermediate water tank, 7-Security filter, 8-Pressure gauge, 9- Membrane filter, 10-No. 1 dosing box, 11-No. 2 dosing box, 12-No. 3 dosing box, 13-Sludge outlet, 201-First sewage valve, 202-Second sewage valve, 203- The third sewage valve, 204-the fourth sewage valve, 205-the fifth sewage valve, 206-the sixth sewage valve, 207-the seventh sewage valve, 208-the eighth sewage valve, 209-the ninth sewage valve, 210-reverse Flush outlet valve, 211-backwash water inlet valve, 301-first sewage pump, 302-second sewage pump, 303-third sewage pump, 304-high pressure pump.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

In each of the following embodiments or examples, if there is no specific functional component or structure, it means that it is a conventional component or conventional structure adopted in the art to realize the corresponding function.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the description of the present invention, unless otherwise specified, the terms "first", "second", "third", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In order to overcome at least one of the following defects in the prior art: 1) the Fenton oxidation method is used to treat wastewater with a high concentration of COD, and the consumption of chemicals is large; The photocatalytic reaction effect is poor; 3) When the membrane separation technology treats wastewater, the organic matter in the wastewater is easy to cause membrane fouling. One of the technical solutions of the present invention provides a mobile device for treating dissolved organic sewage, please refer to Figure 1, the device includes a movable platform and a sewage collection tank 1 and an adsorption column 2 all arranged on the platform , an advanced oxidation reactor 3 and a membrane filtration assembly, the sewage collection tank 1, the adsorption column 2 and the membrane filtration assembly are sequentially connected through a first pipeline to form an adsorption-membrane filtration module, and the sewage collection pool 1 , the advanced oxidation reactor 3 and the membrane filtration assembly are connected sequentially through a second pipeline to form an advanced oxidation-membrane filtration module, the sewage collection tank 1, the adsorption column 2, the advanced oxidation reactor 3 and the membrane filtration assembly are connected in sequence through a third pipeline to form an adsorption-advanced oxidation-membrane filtration module, the sewage collection tank 1, the advanced oxidation reactor 3, the adsorption column 2 and the membrane filtration assembly They are connected sequentially through the fourth pipeline to form an advanced oxidation-adsorption-membrane filtration module.

In some specific implementation manners, please refer to FIG. 1 , a first sewage pump 301 is provided at the water outlet of the sewage collection tank 1, and the first sewage pump 301 transports the sewage in the sewage collection tank 1 to the The adsorption column 2 or the advanced oxidation reactor 3 .

In some specific implementations, please refer to FIG. 1, the advanced oxidation-adsorption-membrane filtration module further includes a second sewage pump 302 arranged between the adsorption column 2 and the advanced oxidation reactor 3, so The second sewage pump 302 transports the sewage from the advanced oxidation reactor 3 to the adsorption column 2 .

In some specific embodiments, please refer to Fig. 1, the mobile device also includes an intermediate water tank 6, the sewage treated by the adsorption column 2 or the advanced oxidation reactor 3 first flows through the intermediate water tank 6, and then enters The membrane filtration module.

In a more specific embodiment, the membrane filtration assembly includes an interconnected security filter 7 and a membrane filter 9, the security filter 7 is connected to the intermediate water tank 6, and the security filter 7 and the A third sewage pump 303 is provided between the intermediate water tanks 6 , and a high-pressure pump 304 is provided between the security filter 7 and the membrane filter 9 .

In a more specific embodiment, the membrane of the membrane filter 9 is a nanofiltration membrane or an ultrafiltration membrane.

In some specific embodiments, please refer to FIG. 1 , the interior of the adsorption column 2 is filled with activated carbon, activated coke or resin.

In some specific implementations, please refer to FIG. 1 , the advanced oxidation reactor 3 is provided with an ultraviolet irradiation lamp 4 and a photothermal coating 5 .

The second technical solution of the present invention provides a method for treating dissolved organic sewage. The method is carried out by using the above-mentioned mobile device, and the method includes the following four processes:

Adsorption-Membrane Filtration Process: The sewage to be treated in the sewage collection tank 1 is introduced into the adsorption column 2 by the first sewage pump 301, and the sewage treated by the adsorption column 2 passes through the intermediate water tank 6, the third sewage pump 303, and the security filter in sequence 7 and high pressure pump 304 introduce membrane filter 9;

Advanced oxidation-membrane filtration process: the sewage to be treated in the sewage collection tank 1 is introduced into the advanced oxidation reactor 3 by the first sewage pump 301, and the oxidation reaction is carried out after adding the oxidizing agent, and the obtained liquid flows through the intermediate water tank 6 and the third water tank in sequence. Sewage pump 303, security filter 7 and high pressure pump 304 enter membrane filter 9;

Adsorption-Advanced Oxidation-Membrane Filtration Process: The sewage to be treated in the sewage collection tank 1 is introduced into the adsorption column 2 by the first sewage pump 301, and the liquid after adsorption and filtration is introduced into the advanced oxidation reactor 3, and oxidized after adding oxidizing agent reaction, the resulting liquid enters the membrane filter 9 through the intermediate water tank 6, the third sewage pump 303, the security filter 7 and the high-pressure pump 304 successively;

Advanced oxidation-adsorption-membrane filtration process: the sewage to be treated in the sewage collection tank 1 is introduced into the advanced oxidation reactor 3 by the first sewage pump 301, and the oxidation reaction is carried out after adding the oxidizing agent, and the obtained liquid is introduced by the second sewage pump 302 In the adsorption column 2, the filtered liquid flows through the intermediate water tank 6, the third sewage pump 303, the security filter 7 and the high pressure pump 304 (304) and enters the membrane filter 9 in sequence.

In some specific embodiments, when the sewage to be treated undergoes adsorption treatment, the sewage enters the adsorption column 2 from the top of the adsorption column 2 and flows out of the adsorption column 2 from the bottom of the adsorption column 2 .

In some specific embodiments, the advanced oxidation is Fenton oxidation or photocatalytic oxidation.

Example 1:

This embodiment provides a mobile device for treating dissolved organic sewage. As shown in Figure 1, the device includes a sewage collection tank 1, an adsorption column 2, an advanced oxidation reactor 3, an ultraviolet light irradiation lamp 4, a photothermal coating Layer 5, intermediate water tank 6, security filter 7, pressure gauge 8, membrane filter 9, No. 1 dosing box 10, No. 2 dosing box 11, No. 3 dosing box 12, mud outlet 13, first sewage Valve 201, second sewage valve 202, third sewage valve 203, fourth sewage valve 204, fifth sewage valve 205, sixth sewage valve 206, seventh sewage valve 207, eighth sewage valve 208, ninth sewage valve 209 , backwash water outlet valve 210 , backwash water inlet valve 211 , first sewage pump 301 , second sewage pump 302 , third sewage pump 303 , high pressure pump 304 . The device also includes a movable platform on which a sewage collection tank 1, an adsorption column 2, an advanced oxidation reactor 3, an intermediate water tank 6, a security filter 7, a pressure gauge 8 and a membrane filter 9 are all set.

Sewage collection tank 1, first sewage pump 301, seventh sewage valve 207, adsorption column 2, fifth sewage valve 205, intermediate water tank 6, third sewage pump 303, security filter 7, high pressure pump 304, pressure gauge 8 and The membrane filters 9 are connected in sequence through the first pipeline to form an adsorption-membrane filtration module.

Sewage collection tank 1, first sewage pump 301, ninth sewage valve 209, advanced oxidation reactor 3, fourth sewage valve 204, intermediate water tank 6, third sewage pump 303, security filter 7, high pressure pump 304, pressure gauge 8 and membrane filter 9 are connected in sequence through a second pipeline to form an advanced oxidation-membrane filtration module.

Sewage collection tank 1, first sewage pump 301, seventh sewage valve 207, adsorption column 2, second sewage valve 202, advanced oxidation reactor 3, fourth sewage valve 204, intermediate water tank 6, third sewage pump 303, security The filter 7, the high-pressure pump 304, the pressure gauge 8 and the membrane filter 9 are sequentially connected through a third pipeline to form an adsorption-advanced oxidation-membrane filtration module.

Sewage collection tank 1, first sewage pump 301, ninth sewage valve 209, advanced oxidation reactor 3, third sewage valve 203, second sewage pump 302, eighth sewage valve 208, adsorption column 2, fifth sewage valve 205 , the intermediate water tank 6, the third sewage pump 303, the security filter 7, the high-pressure pump 304, the pressure gauge 8 and the membrane filter 9 are sequentially connected through the fourth pipeline to form an advanced oxidation-adsorption-membrane filtration module.

As shown in Figure 4, the fresh water of the membrane filter 9 is discharged from the right outlet pipe, and the concentrated water is discharged from the upper pipe; the concentrated water outlet of the membrane filter 9 is also returned to the sewage collection tank 1 through the sixth sewage valve 206; The membrane type is nanofiltration membrane or ultrafiltration membrane.

The advanced oxidation reactor 3 is also connected with No. 1 dosing box 10, No. 2 dosing box 11 and No. 3 dosing box 12. The inside of the advanced oxidation reactor 3 is also equipped with a stirring paddle, an ultraviolet light lamp 4, a photothermal coating Layer 5; advanced oxidation reactor 3 can perform Fenton reaction, sodium hypochlorite reaction, ultraviolet light-Fenton reaction, ultraviolet radiation reaction, etc. Among them, the dosing agents for Fenton reaction are FeSO ₄ and H ₂ O ₂ , used for ultraviolet light reaction The catalyst is TiO ₂ , ZnO, etc.; the bottom of the advanced oxidation reactor 3 is also provided with a sludge outlet 13 .

This embodiment also provides a method for treating dissolved organic sewage, which is carried out using the above-mentioned mobile device, and the method includes the following four processes:

Adsorption-membrane filtration process: the sewage to be treated in the sewage collection tank 1 is introduced into the adsorption column 2 by the first sewage pump 301 through the seventh sewage valve 207, and the sewage after adsorption treatment passes through the fifth sewage valve 205, the intermediate water tank 6, The third sewage pump 303 , the security filter 7 and the high pressure pump 304 enter the membrane filter 9 .

Advanced oxidation-membrane filtration process: the sewage to be treated in the sewage collection tank 1 is introduced into the advanced oxidation reactor 3 by the first sewage pump 301 through the ninth sewage valve 209, and passed through the No. 1 dosing box 10 and the No. 2 dosing box 11 No. 3 dosing box 12 carries out the oxidation reaction after adding a certain amount of oxidizing agent, and the obtained liquid enters the membrane filter through the fourth sewage valve 204, the intermediate water tank 6, the third sewage pump 303, the security filter 7 and the high-pressure pump 304 in sequence 9.

Adsorption-advanced oxidation-membrane filtration process: the sewage to be treated in the sewage collection tank 1 is introduced into the adsorption column 2 by the first sewage pump 301 through the seventh sewage valve 207, and the filtered liquid is introduced into the advanced oxidation reaction through the second sewage valve 202 Device 3, through No. 1 dosing box 10, No. 2 dosing box 11, and No. 3 dosing box 12, after adding a certain amount of oxidizing agent, the oxidation reaction is carried out, and the obtained liquid passes through the fourth sewage valve 204, the middle water tank 6, the No. Three sewage pumps 303 , security filter 7 and high pressure pump 304 enter the membrane filter 9 .

Advanced oxidation-adsorption-membrane filtration process: the sewage to be treated in the sewage collection tank 1 is introduced into the advanced oxidation reactor 3 by the first sewage pump 301 through the ninth sewage valve 209, and then passed through the No. The medicine box 11 and No. 3 dosing box 12 are added with a certain amount of oxidizing agent to carry out the oxidation reaction, and the obtained liquid is introduced into the adsorption column 2 through the third sewage valve 203, and then through the second sewage pump 302 and the eighth sewage valve 208 in turn. The filtered liquid is introduced into the intermediate water tank 6 through the fifth sewage valve 205, and then enters the membrane filter 9 through the third sewage pump 303, the security filter 7 and the high-pressure pump 304 in sequence.

As shown in Figure 2, when the sewage is subjected to adsorption and filtration treatment, the sewage enters water from the upper end of the adsorption column 2 and discharges water from the lower end of the adsorption column 2; Enter the adsorption column 2 through the first sewage valve 201 and the backwash water inlet valve 211 (set below the adsorption column 2), and the waste liquid after washing is discharged by the backwash water outlet valve 210 (set above the adsorption column 2); the adsorption column 2 The interior is filled with adsorption materials, the filler is one of activated carbon, activated coke, and resin, and the residence time of sewage is 30-600min.

The sewage inflow and outflow of the advanced oxidation reactor 3 in the advanced oxidation-membrane filtration process, the adsorption-advanced oxidation-membrane filtration process and the advanced oxidation-adsorption-membrane filtration process is shown in Figure 3.

In this embodiment, the adsorption-membrane filtration module, advanced oxidation-membrane filtration module, adsorption-advanced oxidation-membrane filtration module and advanced oxidation-adsorption-membrane filtration module have different processing efficiencies, and the four formed The module can realize the pre-treatment, terminal treatment and advanced treatment of sewage.

In the present invention, adsorption and advanced oxidation are used as the pretreatment of membrane filtration treatment. Adsorption can remove some organic matter in sewage, and hydroxyl radicals (OH) produced by advanced oxidation have extremely strong oxidizing ability and can oxidize absolute in sewage. most organic matter. In the actual treatment process, the type of adsorbent or the type of advanced oxidation can be selected according to the water quality of the raw sewage, or the adsorption and advanced oxidation treatment methods can be coupled to achieve different treatment requirements.

Example 2:

Sewage is taken from a gas turbine power plant to clean waste liquid for steam turbines. The COD is 2132mg/L, the biodegradability is 0.033, it is not biodegradable, and the content of suspended solids is extremely low. The waste liquid is in a dissolved state and is easy to foam, which increases the treatment. difficulty. The waste liquid is treated by the adsorption-advanced oxidation-membrane filtration module and the adsorption-advanced oxidation-membrane filtration process of the mobile device of embodiment 1, wherein the filler in the adsorption column 2 is an anionic adsorption resin, and the advanced oxidation reactor 3 The reaction carried out is the Fenton reaction. The dosage of hydrogen peroxide added in the Fenton reaction is 10ml/L, the dosage of ferrous sulfate heptahydrate is 12.5g/L, and the coagulant polyaluminum ferric chloride and The coagulation aid is polyacrylamide, and the membrane type in the membrane filter 9 is a nanofiltration membrane.

The waste liquid is collected by the sewage collection tank 1, and sent to the activated carbon adsorption column 2 through the seventh sewage valve 207 through the first sewage pump 301, and stays in the adsorption column 2 for 40 minutes. In the oxidation reactor 3, the waste liquid in the advanced oxidation reactor 3 is heated through the photothermal coating 5, and when the temperature reaches 80°C, the pH value is adjusted to 3 by the sulfuric acid in the No. Add Fenton's reagent (FeSO ₄ and H ₂ O ₂ ) into No. 2 chemical dosing box 11 and stir it. The reaction time is about 40 minutes. After the oxidation reaction is completed, polyaluminum ferric chloride is added through No. 3 chemical dosing box 12 for coagulation. As shown in Figure 5 and Figure 6, too high or too low dosage of Fenton's reagent and coagulant will have an adverse effect on the degradation efficiency of organic matter. As well as COD removal efficiency, it is determined that the dosage of Fenton’s reagent is H ₂ O ₂ : COD mass ratio (Rm) ranges from 1.5:1 to 1.7:1, H ₂ O ₂ : Fe ²⁺ molar ratio (Rn) ranges from 20 :1～25:1.

After the solid-liquid separation, the bottom mud is discharged through the mud outlet 13, and the supernatant is introduced into the intermediate water tank 6 through the fourth sewage valve 204, and then introduced into the membrane filter 9 through the third sewage pump 303, the security filter 7, and the high-pressure pump 304. After membrane filtration, the concentrated water flows back through the sixth sewage valve 206 . When the nanofiltration membrane model is NF90, the COD concentration of the fresh water effluent of the nanofiltration membrane is 45mg/L, which is far lower than the third-level discharge standard in the "Integrated Wastewater Discharge Standard" GB8978-1996, and meets the People's Republic of China The cooling water requirement (COD<60mg/L) in the national standard "Urban Sewage Recycling Industrial Water Quality" GB/T 19923-2005 can be used as circulating cooling water in the plant to realize resource utilization.

Example 3:

The COD concentration of a certain wastewater is 15400mg/L, which is a colorless and transparent liquid. The advanced oxidation-adsorption-membrane filtration module of the mobile device of Example 1 and the advanced oxidation-adsorption-membrane filtration process are used to treat the waste liquid. The advanced oxidation can degrade a large amount of organic matter in the wastewater, and the adsorption method can further remove the organic matter in the wastewater. Membrane filtration further removes the substances with larger molecular weight in the sewage to achieve the purpose of discharge up to the standard.

After the untreated waste liquid is collected in the sewage collection tank 1, it is introduced into the advanced oxidation reactor 3 by the first sewage pump 301 through the ninth sewage valve 209, and _TiO2 is added therein as a catalyst, and the ultraviolet light irradiation lamp is turned on at the same time 4. Carry out photocatalytic reaction, the reaction time is 30min. After the photocatalytic reaction is over, the waste liquid is introduced into the adsorption column 2 through the third sewage valve 203 through the second sewage pump 302, and then through the eighth sewage valve 208. The filler in the adsorption column 2 is activated coke, and the residence time of sewage is 30 minutes. After adsorption, the waste liquid is introduced into the intermediate water tank 6 by the fifth sewage valve 205, and introduced into the membrane filter 9 through the third sewage pump 303, security filter 7, high-pressure pump 304, and pressure gauge 8. The membrane type in the membrane filter 9 is Nanofiltration membrane, the model is NF270, the concentrated water effluent of the membrane filter 9 is refluxed through the sixth sewage valve 206, and the fresh water can be discharged directly. The final fresh water effluent COD concentration of this device is 356mg/L, which meets the "Comprehensive Wastewater Discharge Standard" GB The three-level emission standard in 8978-1996 can be discharged.

After the sewage treatment is finished, open the first sewage valve 201 connected to the adsorption column 2, introduce the backwash water by the first sewage pump 301, open the backwash water inlet valve 211 and the backwash water outlet valve 210 at the same time, and discharge the backwash liquid .

The wastewater has a relatively high COD concentration, but it is in a colorless and transparent state. In the treatment process, both the adsorption-advanced oxidation-membrane filtration process and the advanced oxidation-adsorption-membrane filtration process can be used. In this embodiment, The final COD concentration of the former is 368mg/L, and the final COD concentration of the latter is 356mg/L, indicating that the two have the same treatment capacity for the waste liquid, but for some waste water containing certain suspended solids, advanced oxidation (such as Fenton reaction), using the coagulation effect of the Fenton reaction itself and adding a coagulant to remove suspended solids in the sewage, and at the same time remove a large amount of organic matter in the sewage, and then remove the residual suspended solids and chromaticity through the adsorption column 2 Turbidity, reduce the load of subsequent membrane filtration, prolong the service life of the membrane, and improve the treatment efficiency. If the wastewater containing suspended solids is directly introduced into the adsorption column 2, the adsorption column 2 will be blocked in a short time, and the adsorption cannot be performed normally.

Example 4:

The COD concentration of a certain wastewater is 1200mg/L, the molecular weight of the wastewater is large, the turbidity is low, the chroma is high, the chroma is 536PCU, the biodegradability is extremely low, 0.0024, and it is not easy to biodegrade. The waste water is generated intermittently, and the sewage output is 1 ton per day, but it is difficult to treat. Due to its low biodegradability, if it is directly discharged into the sewage treatment system, the microorganisms in the sewage treatment system will be seriously affected or even killed. Due to the low COD concentration of the wastewater, there is no need to use advanced oxidation, and the wastewater has a certain chromaticity, therefore, the adsorption-membrane filtration module and the adsorption-membrane filtration process of the device in Example 1 can be used to meet the treatment requirements, and the treated liquid is processed. Discharge.

The wastewater in the sewage collection tank 1 is introduced into the adsorption column 2 through the first sewage pump 301 through the seventh sewage valve 207. The filler in the adsorption column 2 is activated carbon, and the residence time of the wastewater in the column is 50 minutes. The fifth sewage valve 205 is introduced into the intermediate water tank 6. When the waste water in the intermediate water tank 6 accumulates to a certain extent, the waste water is introduced into the membrane filter 9 through the third sewage pump 303, the security filter 7, the high-pressure pump 304 and the pressure gauge 8, The membrane type in the membrane filter 9 is an ultrafiltration membrane, the model is GC-UF 0102, the ultrafiltration concentrated water effluent returns to the sewage collection tank 1 through the sixth sewage valve 206, and the ultrafiltration fresh water effluent is discharged, and its COD concentration is 186mg /L, meeting the third-level discharge standard in the "Integrated Wastewater Discharge Standard" GB 8978-1996.

For the selection of the membrane type in the membrane filter 9, it can be changed according to the actual molecular weight of the wastewater, and the adsorption column 2 and the advanced oxidizer can be selected according to the characteristics of the wastewater and the treatment requirements.

Example 5:

The COD concentration of a certain wastewater is 500mg/L, all of which are dissolved organic matter, with a high chroma of 812PCU, poor biodegradability, and not easy for biological treatment. The mobile device adsorption-advanced oxidation-membrane filtration combined process of embodiment 1 is used for processing, wherein, the inner packing of the adsorption column 2 is activated carbon, and the oxidation process in the advanced oxidizer 3 is ultraviolet photocatalysis, and the ultraviolet irradiation lamp 4 needs to be turned on, and the membrane The filter 9 is a nanofiltration membrane.

The waste liquid is collected by the sewage collection tank 1, and sent to the activated carbon adsorption column 2 through the seventh sewage valve 207 through the first sewage pump 301, and stays in the adsorption column 2 for 40 minutes. In the oxidation reactor 3, turn on the ultraviolet light irradiation lamp 4, add the catalyst TiO ₂ , and the reaction time of the waste liquid is 40 minutes. 7. The high-pressure pump 304 is introduced into the membrane filter 9, and the concentrated water flows back through the sixth sewage valve 206 after membrane filtration. The COD concentration of the effluent is 38mg/L, which also meets the three-level discharge standard in the "Integrated Wastewater Discharge Standard" GB 8978-1996 and the cooling water requirements in the "Urban Sewage Reuse Industrial Water Quality" GB/T 19923-2005.

Comparative example 1:

Compared to Example 2, it is mostly the same except that only the Fenton oxidation is performed. The waste liquid is collected by the sewage collection tank 1, sent to the advanced oxidation reactor 3 through the first sewage pump 301, the first sewage valve 201 and the second sewage valve 202 in turn, and the photothermal coating 5 is applied to the advanced oxidation reactor 3. The middle waste liquid is heated, and when the temperature reaches 80°C, the pH value is adjusted to ₃ by the sulfuric _acid in _No. ) and stirring, the reaction time is about 40min, after the oxidation reaction is finished, polyaluminum ferric chloride is added through the No.

As shown in Figure 5, the COD removal rate increases with the increase of the dosage of Fenton agent, but when the dosage of Fenton agent in this comparative example is the same as that of Example 2, the concentration of COD effluent is 320mg/L, when increasing With a large amount of medicine, the highest COD removal rate of this comparative example can reach 89%. At this time, the COD concentration of the effluent is 230mg/L, which is quite different from the COD concentration of the effluent in Example 2. Fenton oxidation alone cannot achieve cleaning Efficient removal effect of dissolved organic matter in waste liquid.

Comparative example 2:

Compared to Example 2, most are the same except that only membrane filtration is performed. The waste liquid is collected by the sewage collection tank 1, sent to the intermediate water tank 6 through the first sewage pump 301, the first sewage valve 201 and the fifth sewage valve 205, and when the waste water accumulates to a certain level, the waste water is passed through the third sewage pump 303 , security filter 7, high-pressure pump 304 and pressure gauge 8 are introduced into the membrane filter 9, the concentrated water outlet of the membrane filter 9 is refluxed through the sixth sewage valve 206, and the fresh water is directly discharged. The membrane model in the membrane filter 9 is NF90 or NF270. When the membrane model is NF90, the membrane flux after 70 hours is 8.26L·(m ² ·h) ^-1 , and the COD concentration of the effluent is 56mg/L, meeting the national standard of the People's Republic of China "Urban Sewage Recycling Industrial Water Quality" GB /T19923-2005 cooling water requirements (COD<60mg/L), can be used as circulating cooling water in the factory, etc., to realize the recycling of waste water. When the membrane model is NF270, the membrane flux after 70 hours is 36.86L·(m ² ·h) ^-1 , and the COD concentration of the effluent is 376mg/L, which does not meet the national standard of the People's Republic of China "Urban Sewage Reuse Industrial Water Quality" The cooling water requirements in GB/T 19923-2005, but meet the three-level discharge standard in GB 8978-1996 of the "Integrated Wastewater Discharge Standard", and can discharge up to the standard.

The treatment effect of NF90 is better, and the produced water meets the standard of sewage regeneration and reuse, but the membrane flux is very low, and the water production per unit time is low. The flux of NF270 membrane is relatively high, but the effluent quality can only meet the standard discharge requirements. In addition, after water treatment, as shown in Figure 7a and Figure 7b, the surface of the membrane of this comparative example was seriously polluted within 70h, and the membrane that had undergone pretreatment (ie adsorption-advanced oxidation) in Example 2 (Figure 7c Compared with Fig. 7d), the surface of the nanofiltration membrane of this comparative example is obviously enriched with ring-shaped and spherical pollutants, which will greatly shorten the service life of the membrane and greatly increase the economic cost.

Comparative example 3:

Compared to Example 2, most are the same except that only resin adsorption is performed. The waste liquid is collected by the sewage collection tank 1, and sent to the adsorption column 2 through the first sewage pump 301 and the seventh sewage valve 207 for adsorption reaction. The filler in the adsorption column is anionic adsorption resin. The height of the resin packing in the adsorption column was consistent with that of Example 2, the residence time of the wastewater was 40 min, and the COD concentration of the effluent was 1232 mg/L. If the residence time is increased to 120min, the effluent COD concentration is 896mg/L, which still does not meet the third-level discharge standard in the "Integrated Sewage Discharge Standard" GB 8978-1996, and has a great gap with the effluent COD concentration in Example 2. Therefore, it is difficult to achieve efficient removal of organic matter by using anionic adsorption resin alone.

Comparative example 4:

Compared with Example 4, most of them are the same, except that only activated carbon adsorption is performed. The waste liquid is collected by the sewage collection tank 1 and sent to the adsorption column 2 through the first sewage pump 301 and the seventh sewage valve 207 for adsorption reaction. The filler in the adsorption column is activated carbon. When the height of the activated carbon packing in the adsorption column is consistent with that of Example 2, the residence time of the wastewater is 40 minutes, and the COD concentration of the effluent is 760 mg/L. When increasing the activated carbon packing height in the adsorption column to be 2 times that of Example 2, the residence time is 40min, and the effluent COD concentration is 440mg/L, it has met the three-level discharge standard in the "Comprehensive Wastewater Discharge Standard" GB 8978-1996, However, there is still a huge gap with the COD concentration of the effluent in Example 2. Therefore, it is difficult to achieve deep removal of organic matter by using activated carbon adsorption alone.

Comparative example 5:

Compared with Example 5, most of them are the same, except that only UV photocatalysis is carried out. The waste liquid is collected by the sewage collection tank 1, sent to the advanced oxidizer 3 through the first sewage pump 301 and the ninth sewage valve 209, the ultraviolet irradiation lamp 4 is turned on, and the catalyst TiO ₂ is added. The waste liquid reaction time is 40 minutes. After the reaction, the waste liquid COD concentration was 432mg/L. The chromaticity remains at the original level, which means that when the chromaticity is high, the permeability of ultraviolet light will be poor, and the light intensity of the ultraviolet lamp will be shielded to a certain extent, resulting in the inability of ultraviolet light to act on wastewater and produce more hydroxyl groups Free radicals greatly weaken the degradation efficiency of organic matter in wastewater.

The above descriptions of the embodiments are for those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative effort. Therefore, the present invention is not limited to the above-mentioned embodiments. Improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.

Claims (10)

1. a mobile device for processing dissolved organic sewage is characterized in that it comprises a movable platform and a sewage collection pool (1), an adsorption column (2), an advanced oxidation reactor ( 3) and the membrane filtration assembly, the sewage collection pool (1), the adsorption column (2) and the membrane filtration assembly are sequentially connected through the first pipeline to form an adsorption-membrane filtration module, and the sewage collection pool ( 1), the advanced oxidation reactor (3) and the membrane filtration assembly are connected in sequence through a second pipeline to form an advanced oxidation-membrane filtration module, the sewage collection tank (1), the adsorption column (2) , the advanced oxidation reactor (3) and the membrane filtration assembly are connected in sequence through a third pipeline to form an adsorption-advanced oxidation-membrane filtration module, the sewage collection tank (1), the advanced oxidation reactor ( 3), the adsorption column (2) and the membrane filtration module are sequentially connected through a fourth pipeline to form an advanced oxidation-adsorption-membrane filtration module. 2. A mobile device for treating dissolved organic sewage according to claim 1, characterized in that a first sewage pump (301) is provided at the water outlet of the sewage collection tank (1), and the first sewage pump (301) A sewage pump (301) transports the sewage in the sewage collection tank (1) to the adsorption column (2) or the advanced oxidation reactor (3). 3. A mobile device for treating dissolved organic sewage according to claim 1, characterized in that, the advanced oxidation-adsorption-membrane filtration module also includes the adsorption column (2) and the advanced A second sewage pump (302) between the oxidation reactors (3), the second sewage pump (302) transports the sewage from the advanced oxidation reactor (3) to the adsorption column (2). 4. A mobile device for treating dissolved organic sewage according to claim 1, characterized in that the mobile device also includes an intermediate water tank (6), through which the adsorption column (2) or the advanced oxidation reactor (3) The treated sewage first flows through the intermediate water tank (6), and then enters the membrane filter assembly. 5. A mobile device for treating dissolved organic sewage according to claim 4, characterized in that, said membrane filtration assembly comprises a security filter (7) and a membrane filter (9) connected to each other, said The security filter (7) is connected with the intermediate water tank (6), and a third sewage pump (303) is arranged between the security filter (7) and the intermediate water tank (6), and the security filter A high-pressure pump (304) is arranged between the device (7) and the membrane filter (9). 6. A mobile device for treating dissolved organic sewage according to claim 5, characterized in that, the membrane of the membrane filter (9) is a nanofiltration membrane or an ultrafiltration membrane. 7. A mobile device for treating dissolved organic sewage according to claim 1, characterized in that the inside of the adsorption column (2) is filled with activated carbon, activated coke or resin. 8. A kind of mobile device for processing dissolved organic sewage according to claim 1, characterized in that, the inside of the advanced oxidation reactor (3) is provided with an ultraviolet light irradiation lamp (4) and a photothermal coating ( 5). 9. A method for treating dissolved organic sewage, characterized in that, the method is carried out using a mobile device as described in any one of claims 1-8, and the method comprises the following four processes: Adsorption-Membrane Filtration Process: The sewage to be treated in the sewage collection tank (1) is introduced into the adsorption column (2) by the first sewage pump (301), and the sewage treated by the adsorption column (2) passes through the intermediate water tank (6) successively , the third sewage pump (303), security filter (7) and high pressure pump (304) introduce membrane filter (9); Advanced oxidation-membrane filtration process: the sewage to be treated in the sewage collection tank (1) is introduced into the advanced oxidation reactor (3) by the first sewage pump (301), and the oxidation reaction is carried out after adding the oxidizing agent, and the obtained liquid flows through the The middle water tank (6), the third sewage pump (303), the security filter (7) and the high pressure pump (304) enter the membrane filter (9); Adsorption-advanced oxidation-membrane filtration process: the sewage to be treated in the sewage collection tank (1) is introduced into the adsorption column (2) by the first sewage pump (301), and the liquid after adsorption and filtration is introduced into the advanced oxidation reactor (3) After adding the oxidizing agent, the oxidation reaction is carried out, and the obtained liquid enters the membrane filter (9) through the intermediate water tank (6), the third sewage pump (303), the security filter (7) and the high-pressure pump (304) successively; Advanced oxidation-adsorption-membrane filtration process: the sewage to be treated in the sewage collection tank (1) is introduced into the advanced oxidation reactor (3) by the first sewage pump (301), and the oxidation reaction is carried out after adding the oxidizing agent, and the obtained liquid is obtained by The second sewage pump (302) is introduced into the adsorption column (2), and the filtered liquid flows through the intermediate water tank (6), the third sewage pump (303), the security filter (7) and the high pressure pump (304) to enter the membrane filter (9). 10. A method for treating dissolved organic sewage according to claim 9, characterized in that, when the sewage to be treated is subjected to adsorption treatment, the sewage enters the adsorption column (2) from the top of the adsorption column (2), The adsorption column (2) flows out from the bottom of the adsorption column (2).

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