Note: Descriptions are shown in the official language in which they were submitted.
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 TECHNOLOGY
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
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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
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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
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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
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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
90 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
90 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.
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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.
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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,
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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
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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 90 elbow 37, the first acid-base injection point 19 is
provided on
the first 90 elbow 35, and the ozone wastewater mixing pump 8 is disposed
between
the second 90 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
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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.
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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
25, 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.
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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
40 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 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 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.
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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
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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 900
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
(112) 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
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14
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 the
filter 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.
CA 03228086 2024- 2-5
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.
CA 03228086 2024- 2-5
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