AU2022378146B2

AU2022378146B2 - Fenton process and ceramic membrane filtering-integrated sewage treatment unit

Info

Publication number: AU2022378146B2
Application number: AU2022378146A
Authority: AU
Inventors: Wai On Leung
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-25
Filing date: 2022-10-25
Publication date: 2024-03-28
Anticipated expiration: 2042-10-25
Also published as: WO2023072097A1; CA3228086A1; AU2022378146A1; GB2614376A; GB202215653D0

Abstract

A Fenton process and ceramic membrane filtering-integrated sewage treatment unit, comprising an electrode area (1), a Fenton advanced oxidation treatment area (2), and a device control area (12). The electrode area (1) is connected to a first water inlet pipe (6) and is then connected to one end of a first three-way solenoid valve (4), and the other two ports of the first three-way solenoid valve (4) are respectively connected to a sludge pipe (5) and a second water inlet pipe (7); the device control area (12) is provided with a ceramic membrane filter assembly (18), a system control box (13), and an ozone manufacturing machine (14), the ceramic membrane filter assembly (18) is provided with membrane filters (33) and a security filter (32), a water passing disc (9) is arranged at the center of the top of the Fenton advanced oxidation treatment area (2), a sludge discharging valve (10) is arranged at the bottom end of the Fenton advanced oxidation treatment area (2), the water passing disc (9) is connected to a transit disc (11), and a skimmer (24) is further arranged at the top of the Fenton advanced oxidation treatment area (2). The space occupied a sewage treatment device can be greatly reduced, operation of most systems can be controlled by means of the system control box (13), an automatic treatment process is achieved, and manpower for system management is reduced.

Description

INTEGRATED FENTON PROCESSES WITH CERAMIC MEMBRANE FILTRATION FOR WASTEWATER TREATMENT TECHNICAL FIELD

The present invention relates to the technical field of wastewater treatment, in particular to integrated Fenton processes with ceramic membrane filtration for wastewater treatment.

BACKGROUND OF THE INVENTION

Refuse leachate refers to the moisture from refuse itself, after accumulating and compressing, high-concentration organic matter and wastewater of complex composition leached out of the refuse. The traditional process of treatment of leachate has been facing many problems. A traditional wastewater treatment plant occupies a large footprint and requires human resources for long-term management due to the application of a large amount of chemicals.

The general wastewater treatment process usually adopts a primary treatment and a secondary biological treatment, i.e., the wastewater first undergoes preliminary physical treatment, such as using screens to remove large solids, physical sedimentation to remove heavier solids in water, scraping off the oil and grease on the surface of wastewater, etc.; and then enters the secondary treatment, mainly through biological treatment to reduce the high concentration of COD in the wastewater, such as using anaerobic biological treatment and aerobic biological treatment. In order to meet higher discharge standards, a tertiary treatment such as membrane filtration, activated carbon adsorption, ion exchange, etc. will also be used to further reduce wastewater organic matter and suspended solids. The treated effluent can be directly discharged to a nearby water body or reused.

However, the quality of leachate is complex and variation is relatively large, and there may also be non-biodegradable pollutants and heavy metals. The use of the primary treatment and the secondary biological treatment may not be able to provide effective treatment and meet relevant discharge requirements. In addition, the biological treatment process takes a relatively long period of time and will be affected by many aspects, such as influent quality, temperature, etc. Therefore, the effluent quality of highly variable wastewater will be relatively unstable. A large footprint is required to accommodate the treatment equipment and store the wastewater, and it can be seen that the traditional wastewater treatment process consumes a considerable amount of resources.

In addition, the current wastewater quality supervision and discharge requirements are more stringent. With the growth of population and the increase in the demand of lands, the amount of wastewater generated is also greatly increased. Therefore, traditional wastewater treatment technologies may not meet the needs of all countries and regions. In order to meet the current needs, wastewater treatment processes are constantly improved. For example, the existing leachate treatment plant will add membrane filtration technology after the secondary biological treatment, so as to further reduce the concentration of the pollutants. There are also studies using Fenton oxidation method for direct treatment of leachate.

Fenton advanced oxidation is a very efficient and suitable method for treating wastewater. Ferrous ions and hydrogen peroxide are used for catalytic reaction to produce hydroxyl radicals and hydroxide ions. Hydroxyl radicals have extremely strong oxidation potential to decompose pollutants in water through oxidation reaction, thereby reducing the concentration of pollutants and meeting the discharge standards. Fenton oxidation can be categorized into traditional Fenton, electro-Fenton, photo Fenton, photoelectro-Fenton, sono-Fenton and Fenton-like treatments. Compared with the traditional treatment, a Fenton treatment process is relatively stable and the reaction time is shorter, and it is also suitable for the operation of the treatment plant within a small space.

A utility model patent with publication number CN216038974U in the prior art discloses a catalytic ozonation-Fenton reaction integration wastewater treatment apparatus, including a reaction vessel, an ozone inlet pipe, a wastewater pump, an ejector, an ozone generator, and a chemical dosing device. The treatment apparatus can make a catalytic ozonation reaction and a Fenton reaction take place in the same reaction vessel, and cooperate to treat wastewater, so that the apparatus can have efficient ozone utilization, improve ozone mass transfer efficiency, prevent hardening segmentation of fillers, and improve Fenton reaction efficiency and other advantages. However, it does not combine the effect of ceramic membrane filtration. After a long period of use, filtration will not be complete, or it will not be able to adapt to other wastewater quality.

A patent for invention with publication number CN113713624A in the prior art discloses a double ceramic membrane integrated device for wastewater treatment, and a pressure fault judgment method. It includes a nano ceramic membrane biological filter tower, a first inorganic ceramic membrane filter, a second inorganic ceramic membrane filter, a permeate pump, a circulating pump, an online pressure sensor, a disinfection device and a control device. It can greatly reduce the area occupied by the plant, and there is no need to add chemicals in the system during the operating process, thereby effectively avoiding secondary pollution. Due to the use of a double ceramic membrane, it provides an effective guarantee for low-cost, maintenance-free, and high-quality effluent of wastewater in the treatment process. However, Fenton oxidation method is not used to deal with leachate, and it lacks the capacity of treating leachate.

To sum up, since the traditional treatment process takes a long period of time, the treatment equipment often requires a large area, and when dealing with complex and variable wastewater, the effluent quality is relatively unstable. In order to meet the current environmental needs, it is imminent to develop a new wastewater treatment apparatus.

SUMMARY OF THE INVENTION

The purpose of the present invention is to address the deficiencies in the prior art, and provide a wastewater treatment apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment, which can greatly reduce the space occupied by the wastewater treatment apparatus, and control most of the system operations by a control panel, thereby realizing automatic treatment process and reducing manpower for system management. To achieve the above objectives, the present invention can be achieved by the following technical solution: an apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment, including an electrode chamber, and a Fenton advanced oxidation reactor abutted against the electrode chamber; the electrode chamber is connected with a first influent pipe, the first influent pipe is connected with one port of a first electric actuated three-way valve, two other ports of the first electric actuated three-way valve are connected with a desludge pipe and a second influent pipe respectively, the second influent pipe is provided with an ozone wastewater mixing pump and a first acid-base injection point; an ultrasonic generator is provided at a bottom portion of the electrode chamber, an electrode module is provided inside the electrode chamber; the wastewater treatment apparatus further includes an equipment control chamber, the equipment control chamber is provided with a ceramic membrane filtration system, a control panel, an ozone generator and chemical tanks; a middle portion of the equipment control chamber is provided with a high-frequency pulse power supply and an ultrasonic generator power supply; the ceramic membrane filtration system is provided with a ceramic membrane filter and a cartridge filter, an inlet of the cartridge filter is connected with an interim chamber through a transfer pipe; a second electric actuated three-way valve, a permeate pump, and a third electric actuated three-way valve are connected in sequence on the transfer pipe, another end of the second electric actuated three-way valve is connected with a backwash solution tank, the permeate pump is disposed between the second electric actuated three-way valve and the third electric actuated three-way valve, another end of the third electric actuated three-way valve is connected with a backwash pipe, an outlet of the cartridge filter is connected with a inlet of the ceramic membrane filter through a pipeline, a permeate pipe on the ceramic membrane filter is connected with the backwash pipe; an interim tray is provided at a top central position of the Fenton advanced oxidation reactor, a desludge valve is provided at a bottom end of the Fenton advanced oxidation reactor, the interim tray is connected with the interim chamber, a second acid-base injection point is provided at a top portion of the interim chamber, an outlet of the interim chamber is connected with the transfer pipe, the transfer pipe is connected with the ceramic membrane filtration system; a skimmer is further provided at a top portion of the Fenton advanced oxidation reactor, the skimmer includes an electric motor and a perforated cylinder, the perforated cylinder is connected with a scum discharge point, a spiral screw is provided inside the perforated cylinder; the chemical tanks include a hydrogen peroxide tank, the backwash solution tank, a sulfuric acid tank, and a sodium hydroxide tank; the hydrogen peroxide tank is connected with the ozone wastewater mixing pump through a solution injection pipe, the sulfuric acid tank and the sodium hydroxide tank are respectively connected with the first acid-base injection point and the second acid-base injection point through other solution injection pipes.

Preferably, the chemical tanks are arranged on an opposite side of the ceramic membrane filtration system, the control panel and the ozone generator; the ozone generator is connected with the ozone wastewater mixing pump, the high-frequency pulse power supply is electrically connected with the electrode module, and the ultrasonic generator power supply is electrically connected with the ultrasonic generator.

Preferably, an upper portion of the electrode chamber is a hollow rectangular column structure, the bottom portion of the electrode chamber is an inverted hollow rectangular pyramid structure; an upper portion of the Fenton advanced oxidation reactor is a cylinder structure with a top opening, and a bottom portion of the Fenton advanced oxidation reactor is a conical funnel structure; the interim chamber is a hollow square column structure; an inline mixer is provided inside the second influent pipe, the second influent pipe is further provided with a first 900 elbow, a second 90° elbow, and a third ° elbow, the first acid-base injection point is provided on the first 90° elbow, and the ozone wastewater mixing pump is disposed between the second 90° elbow and the third ° elbow, the second influent pipe is connected with an external influent pump.

Preferably, a top end of the electrode module is connected with the high-frequency pulse power supply through a copper bar, the electrode module is a replaceable assembly, a material of electrode of the electrode module is iron, titanium, or graphite, two adjacent electrodes of the electrode module are separated by an insulator, the insulator is nylon or epoxy resin, and a current interval provided by the high-frequency pulse power supply is 0-1000A.

Preferably, the interim tray is further provided with a pH probe and a level sensor which are fixed by a support bracket.

Preferably, a partition is provided on the interim chamber, and a position of the partition is higher than the scum discharge point.

Preferably, there are two sets of the ceramic membrane filter and one set of the cartridge filter, the inlet of the cartridge filter is connected with the transfer pipe, and the outlet of the cartridge filter is connected with the inlet of the ceramic membrane filter.

Preferably, an opening for ultrasonic generator is provided at the bottom portion of the electrode chamber, the ultrasonic generator is installed in the opening, the ultrasonic generator is used to release 20-35 kHz ultrasonic wave.

Preferably, the perforated cylinder is made of a stainless-steel material, the electric motor is provided at one end of the perforated cylinder, the electric motor is connected with the spiral screw through a connecting shaft, and the perforated cylinder is disposed horizontally in the Fenton advanced oxidation reactor.

Preferably, two sets of V-shaped weir are provided on two sides at a top end of the electrode chamber respectively, one of the two sets of V-shaped weir extends into the Fenton advanced oxidation reactor, and communicates with the Fenton advanced oxidation reactor.

Beneficial effects of the present invention:

The present invention still adopts a tertiary treatment methods, but in terms of treatment technology, it adopts a multi-stage integrated Fenton treatment processes and finally uses a ceramic membrane filtration method to treat wastewater, and integrates various Fenton treatment processes into one to realize multi-stage oxidation and remove organic matter in wastewater. The wastewater is treated in a multi-stage manner, which greatly reduces organic matter in the wastewater. This design can also compact and pack the treatment apparatus together to greatly reduce the space occupied by the wastewater treatment apparatus. Most of the system operations can be controlled by a control panel, so that it can realize automatic treatment of wastewater, easy to use, and reduce the manpower for system management.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a three-dimensional schematic diagram of a wastewater treatment apparatus of the present invention;

Fig. 2 is a schematic diagram of a top view of the wastewater treatment apparatus of the present invention;

Fig. 3 is a schematic diagram of a rear view of the wastewater treatment apparatus of the present invention;

Fig. 4 is a schematic diagram of a right side view of the wastewater treatment apparatus of the present invention;

Fig. 5 is a schematic diagram of a bottom view of the wastewater treatment apparatus of the present invention;

Fig. 6 is a schematic diagram of the connection of a second influent pipe of the present invention;

Fig. 7 is a schematic diagram of an electrode module of the present invention;

Fig. 8 is a schematic diagram of a perforated cylinder of the present invention; and

Fig. 9 is a schematic diagram of the pipeline connection of a ceramic membrane filtration system of the present invention.

In the figures: 1, electrode chamber; 2, Fenton advanced oxidation reactor; 3, electrode module; 4, first electric actuated three-way valve; 5, desludge pipe; 6, first influent pipe; 7, second influent pipe; 8, ozone wastewater mixing pump; 9, interim tray; 10, desludge valve; 11, interim chamber; 12, equipment control chamber; 13, control panel; 14, ozone generator; 15, chemical tank; 16, high-frequency pulse power supply; 17, ultrasonic generator power supply; 18, ceramic membrane filtration system; 19, first acid-base injection point; 20, opening for ultrasonic generator; 21, V-shaped weir; 22, pH probe; 23, level sensor; 24, skimmer; 25, scum discharge point; 26, perforated cylinder; 27, spiral screw; 28, electric motor; 29, second acid-base injection point; 30, transfer pipe; 31, permeate pump; 32, cartridge filter; 33, ceramic membrane filter; 34, permeate pipe; 35, first 900 elbow; 36, second 90° elbow; 37, third 90° elbow; 38, backwash pipe; 39, second electric actuated threeS-way valve; 40, third electric actuated three-way valve.

DETAILED DESCRIPTION OF EMBODIMENTS

The present invention is described further below in conjunction with the accompanying drawings and specific embodiments.

In order to make the objectives, technical features and advantages of the present invention clearer and definite, the present invention will be further described below with reference to the accompanying drawings and embodiments.

Embodiment 1:

As shown in Figures 1 to 9, an apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment, includes an electrode chamber 1 and a Fenton advanced oxidation reactor 2 abutted against the electrode chamber 1; an upper portion of the electrode chamber 1 is a hollow rectangular column structure, a bottom portion of the electrode chamber 1 is an inverted hollow rectangular pyramid structure; an upper portion of the Fenton advanced oxidation reactor 2 is a cylinder structure with a top opening, and a bottom portion of the Fenton advanced oxidation reactor 2 is a conical funnel structure, and an interim chamber 11 is a hollow rectangular column structure.

In the wastewater treatment apparatus, the electrode chamber 1 is connected with a first influent pipe 6, another end of the first influent pipe 6 is connected with one port of a first electric actuated three-way valve 4, two other ports of the first electric actuated three-way valve 4 are connected with a desludge pipe 5 and a second influent pipe 7 respectively, another end of the second influent pipe 7 is used to connect with an influent transfer pump for intaking wastewater; the second inlet pipe 7 is further provided with an ozone wastewater mixing pump 8 and a first acid-base injection point 19, an inline mixer is provided inside the second influent pipe 7, the second influent pipe 7 is provided with a number of 90° elbows, e.g., a first 90 elbow 35, a second 90 elbow 36, and a third 900 elbow 37, the first acid-base injection point 19 is provided on the first 900 elbow 35, and the ozone wastewater mixing pump 8 is disposed between the second 900 elbow 36 and the third 90 elbow 37.

An ultrasonic generator is provided at a bottom portion of the electrode chamber 1, an electrode module 3 is provided inside the electrode chamber 1; an opening for ultrasonic generator 20 is provided at the bottom portion of the electrode chamber 1, the ultrasonic generator is installed in the opening 20, the ultrasonic generator releases 20-35 kHz ultrasonic wave, which can vibrate the wastewater inside the electrode chamber 1, so that ions can be evenly dispersed and pollutants on the electrode can be prevented from accumulating so as to maintain a sufficient reaction area, at the same time, ultrasonic wave can also cause cavitation reaction, generate hydroxyl radicals, and initiate a Fenton reaction, in addition, the ultrasonic wave cooperates with the electrode module 3 reaction, which can cause a demulsification effect, so that greasy pollutant is taken out from the wastewater and floats on the water surface, thereby improving the effect of the next Fenton oxidation treatment. Two sets of V-shaped weir 21 are provided on two sides at a top end of the electrode chamber 1 respectively, one of the two sets of V shaped weir 21 extends into the Fenton advanced oxidation reactor 2, and communicates with the Fenton advanced oxidation reactor 2.

The electrode module 3 is provided inside the electrode chamber 1, the electrode module 3 is replaceable, a top central position of the electrode module 3 is provided with two eye bolts, its top end is further connected with a high-frequency pulse power supply 16 through a copper bar; the electrode module 3 adopted in the present invention is a replaceable assembly, the material of the electrode plates of the electrode module 3 is iron, titanium, graphite, or other material, the electrode module 3 can be disassembled into cathode and anode assemblies, and the cathode and anode assemblies can be replaced according to needs; two adjacent electrodes of the electrode module 3 are separated by an insulator, the material of the insulator is nylon, epoxy resin, or other material, so that the electrode plates can be fixed at a distance, the anode and cathode electrodes are separated to avoid short circuit; a top end position of the electrode module 3 is provided with two eye bolts, when replacing and adjusting the electrode module 3, the eye bolts can be utilized to lift the electrode module 3, the anode copper bar on the high-frequency pulse power supply 16 is connected with the depolarized anode at the top end of the electrodes, the cathode copper bar on the high-frequency pulse power supply 16 is connected with the depolarized cathode at the top end of the electrode plates, the current interval provided by the high-frequency pulse power supply 16 is 0-1000A. This replaceable design is convenient for adjusting the electrode module 3 according to needs, at the same time, the current setting is also flexible, so that a higher degree of freedom of the apparatus is achieved.

An ozone generator 14 is connected with the ozone wastewater mixing pump 8, the inline mixer and the 900 elbows can change the angle and the flow direction of the wastewater, which can hit and generate turbulence to mix the wastewater with chemicals, thereby adjusting the pH value of the wastewater and providing the optimum reaction condition to carry out the Fenton oxidation process. The ozone wastewater mixing pump 8 is provided with an ozone gas inlet and a hydrogen peroxide solution injection port, ozone generated by the ozone generator 14 can be brought to the ozone gas inlet, and hydrogen peroxide in the hydrogen peroxide tank is injected through a hydrogen injection point, the ozone and hydrogen peroxide are completely dissolved by operating the ozone wastewater mixing pump 8, the ozone wastewater mixing pump 8 mixes ozone, hydrogen peroxide and wastewater, so that ozone and hydrogen peroxide are completely dissolved to promote the occurrence of advanced oxidation, and carry out further Fenton oxidation treatment.

In the present embodiment, the inlet of the electrode chamber 1 is installed with the first electric actuated three-way valve 4, which connects the desludge pipe 5 with two inlet pipes, water intaking and sludge discharging processes can be carried out by one opening and valve, this can minimize the size of the wastewater treatment reactor and reduce consumable accessories. The first electric actuated three-way valve 4 can allow intaking of wastewater into the electrode chamber 1 or discharging of sludge out of the electrode chamber 1, the operation of the first electric actuated three-way valve 4 is controlled by the control panel 13, and various electrical operations in the present invention are arranged in the control panel 13 in order to realize centralized automatic operation of the apparatus.

An interim tray 9 is provided at a top central position of the Fenton advanced oxidation reactor 2 of the present invention, a desludge valve 10 is provided at a bottom end of the Fenton advanced oxidation reactor 2, the interim tray 9 is connected with the interim chamber 11, the interim tray 9 is further provided with a pH probe 22 and a level sensor 23 which are fixed by a support bracket, a second acid-base injection point 29 is provided at a top portion of the interim chamber 11, a skimmer 24 is further provided at the top portion of the Fenton advanced oxidation reactor 2, the skimmer 24 includes a perforated cylinder 26 and an electric motor 28, the electric motor 28 is disposed at one end of the perforated cylinder 26, the perforated cylinder 26 is made of a stainless steel material and is connected with a scum discharge point 25, the perforated cylinder 26 is disposed horizontally, a spiral screw 27 is provided inside the perforated cylinder 26, the electric motor 28 is connected with a connecting shaft of the spiral screw 27, when the spiral screw 27 rotates, the scum will be brought into the perforated cylinder 26, and then pushed towards the scum discharge point 25, a partition is provided on the interim chamber 11, the position of the partition is higher than the scum discharge point , this can prevent the scum from flowing to the interim chamber 11, the bottom portion of the interim chamber 11 is provided with an outlet, the outlet of the interim chamber 11 is connected with the transfer pipe 30, the transfer pipe 30 is connected with the cartridge filter 32 in the ceramic membrane filtration system 18.

The wastewater treatment apparatus of the present invention further includes an equipment control chamber 12, the equipment control chamber 12 is provided with chemical tanks 15, the control panel 13, the ozone generator 14 and the ceramic membrane filtration system 18; the chemical tanks 15 are arranged on an opposite side of the ceramic membrane filtration system 18, the control panel 13 and the ozone generator 14; the middle portion of the equipment control chamber 12 is provided with the high-frequency pulse power supply 16 and the ultrasonic generator power supply 17, the ozone generator 14 is connected with the ozone wastewater mixing pump 8, the high-frequency pulse power supply 16 is electrically connected with the electrode module 3, and the ultrasonic generator power supply 17 is electrically connected with the ultrasonic generator to supply power for both.

The ceramic membrane filtration system 18 is provided with ceramic membrane filters 33 and a cartridge filter 32, a water inlet of the cartridge filter 32 is connected with the interim chamber 11 through the transfer pipe 30, there are two sets of the ceramic membrane filters 33 and one set of the cartridge filter 32; a second electric actuated three-way valve 39, a permeate pump 31 and a third electric actuated three-way valve are connected in sequence on the transfer pipe 30, another end of the second electric actuated three-way valve 39 is connected with a backwash solution tank, the permeate pump 31 is disposed between the second electric actuated three-way valve 39 and the third electric actuated three-way valve 40, another end of the third electric actuated three-way valve 40 is connected with a backwash pipe 38, a water outlet of the cartridge filter 32 is connected with water inlets of the ceramic membrane filters 33 through a pipeline, permeate pipes 34 on the ceramic membrane filters 33 are connected with the backwash pipe 38. By controlling the second electric actuated three-way valve 39 and the third electric actuated three-way valve 40, the backwash solution tank and the backwash pipe 38 connected with the transfer pipe 30 can be closed, and then the permeate pump 31 is operated to pump wastewater into the cartridge filter 32 and carry out preliminary filtration, which can filter away the larger suspended solids in the wastewater, the filtrate enters the ceramic membrane filters 33 from the water outlet of the cartridge filter 32 for the next step offiltration treatment, the filtrate enters the water-accumulating pipes in the ceramic membrane filters 33, the suction pressure generated by the permeate pump 31 pushes small particles and water in the wastewater out of the ceramic membrane filters 33 towards an external water storage space, large particles in the wastewater will be blocked by filter layers in the ceramic membrane filters 33, thereby realizing purification and filtration, the filtrate is discharged through the permeate pipes 34; since the ceramic membrane filters 33 are connected with the backwash pipe 38 through the permeate pipes 34, the backwash solution tank can communicate with the backwash pipe 38 and the transfer pipe 30 by controlling the second electric actuated three-way valve 39 and the third electric actuated three-way valve 40, at this time the backwash solution can be pumped into the ceramic membrane filters 33 by operating the permeate pump 31, by periodically injecting backwash solution to flush the water-accumulating pipes in the ceramic membrane filters 33, the pollutants accumulated on the surface and in the pores of the ceramic membranes can be removed, thereby maintaining the performance of the ceramic membrane filters 33.

The chemical tanks 15 include a hydrogen peroxide solution tank, a backwash solution tank, a sulfuric acid solution tank and a sodium hydroxide solution tank; the hydrogen peroxide solution tank is connected with the ozone wastewater mixing pump 8 through a solution injection pipe, the sulfuric acid solution tank and the sodium hydroxide solution tank are respectively connected with the first acid-base injection point 19 and the second acid-base injection point 29 through other solution injection pipes.

Since the V-shaped weir 21 run through the Fenton advanced oxidation reactor 2, wastewater flows into the electrode chamber 1 from the inlet, and flows out of the electrode chamber 1 and into the V-shaped weir 21, then the wastewater passes through the V-shaped weir 21 in the electrode chamber 1, and enters the Fenton advanced oxidation reactor 2. This kind of upward-flowing influent can make the wastewater and the air bubbles generated after the electrode module 3 is electrified move upwards together, and bring the suspended solids in the wastewater to the water surface, this can also increase the reaction path and time of the wastewater through the electrodes, reduce wastewater, reduce odors from the wastewater, and reduce splashing of the wastewater. This structure makes use of the V-shaped weir 21 to bring wastewater from the electrode chamber 1 to the Fenton advanced oxidation reactor 2, which can avoid the need for additional pumps and pipes, at the same time, the design of the V-shaped weir 21 on both sides can make the wastewater flow out evenly, the wastewater can flow through the entire electrodes, so that the electrodes can be evenly utilized to release ions, this prevents the operation of the electrodes from deviating to a discharge direction due to water flowing along one side.

The operating process and principle of the present invention are as follows:

First of all, untreated wastewater is pumped into the second influent pipe 7 by the influent pump, then sulfuric acid is injected through the first acid-base injection point 19, and rapidly mixed with the wastewater in the second influent pipe 7, the acidic wastewater will flow through the ozone wastewater mixing pump 8 provided on the second influent pipe 7, ozone and hydrogen peroxide are introduced into the wastewater through the ozone wastewater mixing pump 8, after reaction with hydrogen peroxide, oxidant hydroxyl radicals will be released, and ozone is also a very strong oxidant, reaction of both will oxidize the wastewater, the ozone wastewater mixing pump 8 is operated to mix ozone and hydrogen peroxide with wastewater, when wastewater flows through the inline mixer provided in the second influent pipe 7 and the 90 elbows, the flow of the wastewater changes and creates turbulence, so that ozone and hydrogen peroxide are completely dissolved and mixed with the wastewater, hence the pH value of the wastewater is reduced, advanced oxidation is carried out, and Fenton advanced oxidation treatment is prepared; wastewater that is completely mixed with sulfuric acid, ozone and hydrogen peroxide flows into the electrode chamber 1 through the first electric actuated three-way valve 4, at this time, the first electric actuated three-way valve 4 closes the valve in the direction of the desludge pipe 5, allowing wastewater to flow into the electrode chamber 1. After the wastewater enters the electrode chamber 1, it flows upwards through the ultrasonic generator, the ultrasonic generator transmits ultrasonic wave into the electrode chamber 1, the wastewater continues to flow upwards to the electrode module 3, the high-frequency pulse power supply 16 provides power, after the electrode module 3 is energized, ferrous ions (Fe2+) and hydrogen (H2) will be released, ultrasonic wave will dissipate the ferrous ions and hydrogen away from the electrode module 3 and spread them out evenly in the electrode chamber 1, by the electrode reaction, demulsification process will occur, oil and grease in the wastewater will be separated from water, through the hydrogen and vibration of ultrasonic wave, grease can rise and float on the water surface, at the same time, ultrasonic wave can cause a cavitation reaction, generate hydroxyl radicals, and trigger a Fenton reaction.

The wastewater continues to flow up to the top of the electrode chamber 1, and flows into the V-shaped weir 21 on both sides at the top of the electrode chamber 1, and then enters the Fenton advanced oxidation reactor 2 through the V-shaped weir 21, by the Fenton oxidation reaction, organic matter of the wastewater will be transformed into scum, small molecule organic matter and inorganic matter; the scum will pass through the skimmer 24 at the top of the Fenton advanced oxidation reactor 2, and the scum will be brought into the cylinder and pushed towards the scum discharge point 25 for discharge, and heavier molecules are deposited at the bottom of the tank by gravity to form sludge, and the sludge at the bottom of the tank can be discharged by opening the desludge valve 10.

The wastewater treated in the first step flows through the interim tray 9 to the interim chamber 11, the interim chamber 11 has a partition which is higher than the scum discharge point 25, this can prevent the scum from flowing into the interim chamber 11; the interim chamber 11 is further provided with the second acid-base injection point 29, sodium hydroxide is injected into the interim chamber 11 through the second acid base injection point 29, neutralization can reduce the solubility of metal pollutants, thereby producing a precipitation effect; thereafter, the wastewater will be discharged to the transfer pipe 30 through the bottom end of the interim chamber 11, the transfer pipe 30 is connected with the inlet of the cartridge filter 32 through the permeate pump 31, the connection of the transfer pipe 30 to the backwash solution tank and the backwash pipe 38 can be closed by controlling the second electric actuated three-way valve 39 and the third electric actuated three-way valve 40, the permeate pump 31 is operated to pump the wastewater into the cartridge filter 32 for preliminary filtration, the larger suspended solids in the wastewater is separated, the filtrate passing through the outlet of the cartridge filter 32 enters into the next step of filtration treatment, the filtrate enters the water-accumulating pipes in the ceramic membrane filters 33, the suction pressure generated by the permeate pump 31 pushes small particles in the wastewater and water into the ceramic membrane filters 33 and then out to an external water storage space, large particles in the wastewater will be blocked by thefilter layers in the ceramic membrane filters 33, and the filtrate will be discharged through the permeate pipes 34 for treatment in the next step. The ceramic membrane filters 33 are also provided with backwash function. The transfer pipe 30 is communicated with the backwash solution tank and the backwash pipe 38 by controlling the second electric actuated three-way valve 39 and the third electric actuated three-way valve 40, the permeate pump 31 is operated to pump the backwash solution into the ceramic membrane filters 33, the backwash solution is periodically injected to flush the water accumulating pipes in order to remove the pollutants accumulated on the surface and in the pores of the membranes, thereby maintaining the efficiency of the ceramic membrane filters 33.

The wastewater is treated in a multi-stage manner, which can greatly reduce the organic matter in the wastewater, this design can compact and pack the treatment apparatus together, which can greatly reduce the space occupied by the wastewater treatment apparatus, and the entire wastewater treatment is automated, most of the system operations can be controlled by the control panel, it is easy to use and manpower for system management can be reduced.

Those skilled in the art can make various other corresponding modifications and changes in shape according to the above-described technical solutions and concepts, and all these modifications and changes in shape should fall within the scope of protection of the claims of the present invention.

Claims

CLAIMS What is claimed is:

1. An apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment, characterized in that, the apparatus comprises an electrode chamber, and a Fenton advanced oxidation reactor abutted against the electrode chamber; the electrode chamber is connected with a first influent pipe, and the other end of first influent pipe is connected to a port of a first electric actuated three-way valve, two other ports of the first electric actuated three-way valve are connected with a desludge pipe and a second influent pipe respectively, the second influent pipe is provided with an ozone wastewater mixing pump and a first acid injection point; an ultrasonic generator is provided at a bottom portion of the electrode chamber, an electrode module is provided inside the electrode chamber; two sets of V-shaped weir are provided on two sides at a top end of the electrode chamber respectively, one of the two sets of V-shaped grooves extends into the Fenton advanced oxidation reactor, and communicates with the Fenton advanced oxidation reactor; the apparatus further comprises an equipment control chamber, the equipment control chamber is provided with a ceramic membrane filtration system, a control panel, an ozone generator and chemical tanks; the chemical tanks are arranged on an opposite side of the ceramic membrane filtration system, the control panel and the ozone generator; a middle portion of the equipment control chamber is provided with a high frequency pulse power supply and an ultrasonic generator power supply; the ozone generator is connected with the ozone wastewater mixing pump, the high-frequency pulse power supply is electrically connected with the electrode module, and the ultrasonic generator power supply is electrically connected with the ultrasonic generator; the ceramic membrane filtration system is provided with a ceramic membrane filter and a cartridge filter, an inlet of the cartridge filter is connected with an interim chamber through a transfer pipe; a second electric actuated three-way valve, a permeate pump, and a third electric actuated three-way valve are connected in sequence on the transfer pipe, another end of the second electric actuated three-way valve is connected with a backwash solution tank, the permeate pump is disposed between the second electric actuated three-way valve and the third electric actuated three-way valve, another end of the third electric actuated three-way valve is connected with a backwash pipe, an outlet of the cartridge filter is connected with a inlet of the ceramic membrane filter through a pipeline, a permeate pipe on the ceramic membrane filter is connected with the backwash pipe; the electrode module is provided at a top central position of the electrode chamber, which is charged with high-frequency pulse power. During the electrolysis reaction, the anode dissolve and release the electrons. The energized electrode module will release ferrous ions (Fe2+) from the anode iron plates and hydrogen (H 2 ) from the wastewater. The wastewater continues to flow upwards to the electrode module. The ultrasonic generator transmits ultrasonic wave into the electrode module. The ultrasonic generator transmits ultrasonic wave into the electrode chamber, ultrasonic wave will dissipate the ferrous ion and hydrogen away from the electrode module and spread them out evenly in the electrode chamber. an interim tray is provided at a top central position of the Fenton advanced oxidation reactor, a desludge valve is provided at a bottom end of the Fenton advanced oxidation reactor, the interim tray is connected with the interim chamber, a second acid base injection point is provided at a top portion of the interim chamber, an outlet of the interim chamber is connected with the transfer pipe, the transfer pipe is connected with the ceramic membrane filtration system; a skimmer is further provided at a top portion of the Fenton advanced oxidation reactor, the skimmer includes an electric motor and a perforated cylinder, the perforated cylinder is connected with a scum discharge point, a spiral screw is provided inside the perforated cylinder; the chemical tanks comprise a hydrogen peroxide tank, the backwash solution tank, a sulfuric acid tank, and a sodium hydroxide tank; the hydrogen peroxide tank is connected with the ozone wastewater mixing pump through a solution injection pipe, the sulfuric acid tank and the sodium hydroxide tank are respectively connected with the first acid injection point and the second acid injection point through other solution injection pipes.

2. The apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment according to claim 1, characterized in that, an upper portion of the electrode chamber is a hollow rectangular column structure, the bottom portion of the electrode chamber is an inverted hollow rectangular pyramid structure; an upper portion of the Fenton advanced oxidation treatment reactor is a cylinder structure with a top opening, and a bottom portion of the Fenton advanced oxidation reactor is a conical funnel structure; the interim chamber is a hollow square column structure; an inline mixer is provided inside the second influent pipe, the second influent pipe is further provided with a first 900 elbow, a second 90° elbow, and a third 90° elbow, the first acid injection point is provided on the first 90° elbow, and the ozone wastewater mixing pump is disposed between the second 90° elbow and the third 90° elbow, the second influent pipe is connected with an external influent pump.

3. The apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment according to claim 1, characterized in that, a top end of the electrode module is connected with the high-frequency pulse power supply through a copper bar, the electrode module is a replaceable assembly, a material of electrode of the electrode module is iron, titanium, or graphite, two adjacent electrodes of the electrode module are separated by an insulator, the insulator is nylon or epoxy resin, and a current interval provided by the high-frequency pulse power supply is 0-1OOOA.

4. The apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment according to claim 1, characterized in that, the interim tray is further provided with a pH probe and a level sensor which are fixed by a support bracket.

5. The apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment according to claim 1, characterized in that, a partition is provided on the interim chamber, and a position of the partition is higher than the scum discharge point.

6. The apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment according to claim 1, characterized in that, an opening for ultrasonic generator is provided at the bottom portion of the electrode chamber, the ultrasonic generator is installed in the opening, the ultrasonic generator is used to release 20-35 kHz ultrasonic wave.

7. The apparatus using integrated Fenton processes with ceramic membrane filtration for wastewater treatment according to claim 1, characterized in that, the perforated cylinder is made of a stainless-steel material, the electric motor is provided at one end of the perforated cylinder, the electric motor is connected with the spiral screw through a connecting shaft, and the perforated cylinder is disposed horizontally in the Fenton advanced oxidation reactor.