CN111675335A - Enhanced nitrogen and phosphorus removal domestic sewage treatment device and method - Google Patents
Enhanced nitrogen and phosphorus removal domestic sewage treatment device and method Download PDFInfo
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- CN111675335A CN111675335A CN202010626204.1A CN202010626204A CN111675335A CN 111675335 A CN111675335 A CN 111675335A CN 202010626204 A CN202010626204 A CN 202010626204A CN 111675335 A CN111675335 A CN 111675335A
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- 239000010865 sewage Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims description 36
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims description 23
- 229910052698 phosphorus Inorganic materials 0.000 title claims description 23
- 239000011574 phosphorus Substances 0.000 title claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 title claims description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 141
- 238000004062 sedimentation Methods 0.000 claims abstract description 41
- 238000005192 partition Methods 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 239000010802 sludge Substances 0.000 claims abstract description 29
- 238000005273 aeration Methods 0.000 claims abstract description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 239000000523 sample Substances 0.000 claims abstract description 8
- 238000005728 strengthening Methods 0.000 claims abstract description 4
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 91
- 239000003638 chemical reducing agent Substances 0.000 claims description 34
- 238000004065 wastewater treatment Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract 1
- 238000005276 aerator Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/006—Regulation methods for biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/04—Oxidation reduction potential [ORP]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention relates to a method and a device for treating domestic sewage by strengthening denitrification and dephosphorization, wherein the device comprises: the system comprises a reaction tank I, a reaction tank II, a sedimentation tank and an automatic operation control system. The device is designed integrally, the tanks are separated by the partition plate, and sewage flows in a self-flowing mode. The reaction tank I and the reaction tank II are internally provided with an aeration pipe, a stirrer, a dissolved oxygen determinator probe and an oxidation-reduction potential electrode. The processing method comprises the following steps: the reaction period of aeration and stirring in the intermittent aeration activated sludge process is controlled by the change of dissolved oxygen and oxidation-reduction potential in the reaction tank, the switching of aerobic, anoxic and anaerobic environments is realized in the same reaction tank, and the denitrification and dephosphorization effects are enhanced.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a method and a device for treating domestic sewage by enhanced nitrogen and phosphorus removal.
Background
Rural domestic sewage treatment is a prominent short plate for current rural human residence environment improvement, has the problems of difficult operation and maintenance fund guarantee, lack of professional technicians, improper treatment process selection and the like, and particularly lacks a sewage treatment technology for a water quality sensitive area with high requirements on removing nitrogen and phosphorus. The total nitrogen removal adopts a nitrification and denitrification method, the scale of rural sewage treatment facilities is small, and the reflux ratio of nitrifying liquid is difficult to control. The stable removal of the total phosphorus needs a chemical phosphorus removal method, and for rural sewage treatment facilities, the problems of high dosing cost, high management level requirement and the like exist. The enhanced nitrogen and phosphorus removal sewage treatment device and the enhanced nitrogen and phosphorus removal sewage treatment method have the advantages that the aerobic, anoxic and anaerobic environments are switched in the same reaction tank in an aeration and stirring alternate operation mode, the operation is simplified, and the treatment effect of nitrogen and phosphorus is enhanced.
Disclosure of Invention
The invention aims to provide a method and a device for strengthening the treatment of nitrogen and phosphorus removal sewage, which strengthen the treatment effect of nitrogen and phosphorus.
The device mainly comprises: the device comprises a reaction tank I, a reaction tank II and a sedimentation tank.
The device is designed integrally and comprises a sewage treatment tank or a sewage treatment container with an opening at the upper end, and a reaction tank I, a reaction tank II and a sedimentation tank which are separated by a partition plate and are not communicated with each other are sequentially arranged from left to right.
A diversion pipeline is arranged on the left side in the reaction tank I, the lower opening end of the diversion pipeline is positioned at the lower part of the reaction tank I, the upper opening end of the diversion pipeline is positioned above the sewage liquid level at the upper part of the reaction tank I, a sludge return port connected with an outlet of a sludge return pipe and a sewage inlet to be treated connected with a water inlet pipe of sewage to be treated are arranged at the upper part of the diversion pipeline, and the diversion pipeline forms a four-way pipe; the inlet of the sludge return pipe is connected with the outlet of a sludge return pump arranged at the middle lower part of the sedimentation tank, so that the sludge can return to the first reaction tank.
The inlet water and the return sludge are mixed in the pipeline and then enter the reaction tank I, the lower opening end at the bottom of the diversion pipeline extends to the position below the water surface and at the depth 2/3-3/4 of the depth of the sewage in the reaction tank I, and the sludge return port on the diversion pipeline is positioned above the inlet of the sewage to be treated.
The upper part of the baffle plate which is spaced from the reaction tank is provided with overflow through holes which are communicated with the reaction tank and are used as water passing ports, the left side and the right side of each overflow through hole are respectively provided with an annular guide plate with a notch at the cross section close to one side of the baffle plate, the end surface of the notch at the cross section of each guide plate is attached or fixedly connected with the baffle plate, each overflow through hole is positioned between the guide plates at the two sides of the baffle plate, and sewage in the reaction tank is guided by the guide plates at the left sides of the baffle plates of the reaction tank through the overflow through holes and then guided by the guide plates at the right sides of.
The cross section of the guide plate in the reaction tank is semicircular, the top of the guide plate is 50-80mm higher than the horizontal plane where the top of the water passing port is located, and the bottom of the guide plate is 100 mm and 150mm below the horizontal plane where the bottom of the water passing port is located.
The cross section of the guide plate at one side of the reaction tank II close to the reaction tank I is semicircular, the top of the guide plate is higher than the water level of the top of the water outlet by 50-80mm, and the bottom of the guide plate is positioned at the water depth 2/3-3/4 of the sewage depth in the reaction tank II.
The upper part of the baffle plate which is spaced from the sedimentation tank of the reaction tank II is provided with an overflow through hole which is communicated with the reaction tank II and the sedimentation tank and is used as a water passing port, the left side and the right side of the overflow through hole are respectively provided with an annular guide plate with a notch on the cross section close to one side of the baffle plate, the end surface of the notch of the cross section of the guide plate is attached or fixedly connected with the baffle plate, the overflow through hole is positioned between the guide plates on the two sides of the baffle plate, and the sewage in the reaction tank II is guided by the guide plates on the left side of the baffle plate of the reaction tank II.
The cross section of the guide plate at one side of the reaction tank II, which is close to the sedimentation tank, is semicircular, the top of the guide plate is 50-80mm higher than the horizontal plane above which the top of the water passing port is positioned, and the bottom of the guide plate is 100 mm and 150mm below the horizontal plane below which the bottom of the water passing port is positioned.
The cross section of the guide plate close to one side of the reaction tank II in the sedimentation tank is semicircular, the top of the guide plate is 50-80mm higher than the horizontal plane where the top of the water outlet is positioned, and the bottom of the guide plate is positioned at the water depth 2/3-3/4 of the sewage in the reaction tank II.
A water outlet pipe is arranged on the side wall surface of the upper part of the sedimentation tank, an annular guide plate with a notch at the cross section close to one side of the inlet of the water outlet pipe is arranged at the inlet of the water outlet pipe in the sedimentation tank, and the end surface of the notch of the cross section of the guide plate is attached or fixedly connected with the side wall surface where the water outlet pipe is positioned; the sewage in the sedimentation tank flows out of the sedimentation tank through the water outlet pipe after being guided by the guide plate by means of water level difference.
The cross section of the guide plate on one side of the sedimentation tank, which is far away from the reaction tank, is semicircular, the guide plate covers the inlet end of the water outlet pipe, the top of the guide plate is 50-80mm higher than the horizontal plane on which the top of the water outlet pipe is positioned, and the bottom of the guide plate is 100 mm and 150mm below the horizontal plane on which the bottom of the water outlet pipe is positioned.
The middle-lower part of the side wall of the sedimentation tank far away from the partition board is designed to be an inclined plate, namely, the middle-lower part of the side wall surface is an inclined plane, so that the cross section of the middle-lower part of the sedimentation tank is gradually reduced from top to bottom, and the inclination angle of the inclined plane (relative to the horizontal plane) is 50-60 degrees.
The first reaction tank and the second reaction tank are respectively provided with an aeration pipe, a stirrer, a dissolved oxygen measuring instrument probe and an ORP electrode.
The reaction tank and the reaction tank are arranged at the bottom of the reaction tank, the aeration pipe at the inner lower part is a perforated aeration pipe, namely, air outlet holes (through holes) with the aperture range of 2-4mm are formed in the side wall of the aeration pipe, the distance between the open holes is 20-50 mm, one end of the aeration pipe is closed, and the other end of the aeration pipe is connected with an air outlet of an air pump through a pipeline.
The stirrers in the first reaction tank and the second reaction tank are arranged at the lower part of the reaction tank and above the aeration pipe, and the stirrers are connected with a speed reducer.
The device is equipped with automatic operation control system, comprises PLC and power controller, and PLC and dissolved oxygen apparatus probe, ORP electrode connection, PLC are connected with power controller, and power controller is connected with air pump, speed reducer, and PLC passes through the switch of power controller control air pump and speed reducer to DO and ORP in the record sewage.
The invention also provides a method for treating domestic sewage by strengthening denitrification and dephosphorization, which comprises the following steps:
the device continuously feeds water, and the water fed into the water inlet pipe is the sewage treated by the domestic sewage through the septic tank, or treated by the regulating tank of the domestic sewage treatment plant, or treated by the grating.
The sewage enters the reaction tank I, the reaction tank II and the sedimentation tank in sequence for treatment and then flows out of the water outlet pipe.
The hydraulic retention time of the first reaction tank and the second reaction tank is 3-6 hours respectively, and the sludge concentration is 3000-4000 mg/L.
The automatic operation control system records DO and ORP in the first reaction tank and the second reaction tank once every 1-2 minutes.
In the reaction tank, starting an air pump through an automatic operation control system, stopping a stirring speed reducer, adjusting aeration amount, enabling DO to reach 2mg/L within 30min, stopping the air pump through the automatic operation control system after the DO reaches 2mg/L, starting the stirring speed reducer, starting timing when ORP is less than-50 mv, stopping the stirring speed reducer through the automatic operation control system after 60min, starting the air pump, and repeatedly operating in the way; if ORP is still larger than-50 mv after the air pump (i) stops working for 150min, the stirring speed reducer (i) also stops working, and the air pump (i) is started;
in the reaction tank II, a stirring speed reducer is started through an automatic operation control system, an air pump II is in a stop state, when DO is less than 0.5mg/L and ORP is less than-50 mv, the air pump II is started, the stirring speed reducer is stopped to work, timing is started at the same time, the stirring speed reducer is started after 60min, the air pump II is stopped to work, and the operation is repeated; if the DO is less than 0.5mg/L and the ORP is less than-50 mv after the air pump II stops working for 60min, the air pump II is also started and the stirring speed reducer II stops working.
The enhanced nitrogen and phosphorus removal sewage treatment device provided by the invention is of an integrated design, all the pool bodies are separated by the partition plates, and sewage flows in a self-flowing mode. The treatment process adopts an intermittent aeration activated sludge method, and forms the switching of aerobic, anoxic and anaerobic environments in the same reaction tank by the mode of alternately operating aeration and stirring, thereby completing the reactions of nitrification, denitrification, phosphorus release and phosphorus absorption while removing organic matters in the sewage, realizing the nitrogen and phosphorus removal of the sewage and simplifying the operation management. Meanwhile, aiming at the condition of large change of the quality and the quantity of the rural sewage, the device is matched with an automatic operation control system to continuously record the change of DO and ORP in the two reaction tanks and adjust the start and the operation time of aeration and stirring in time. The enhanced nitrogen and phosphorus removal sewage treatment device and method provided by the invention have the characteristics of small occupied area, quick response, easiness in management and the like, can meet the sewage treatment requirement of water quality sensitive areas, solve the problem of water area eutrophication, and are suitable for popularization in rural areas.
Drawings
FIG. 1 is a side view of an enhanced denitrification and dephosphorization wastewater treatment device and method.
FIG. 2 is a top view of the enhanced denitrification and dephosphorization wastewater treatment apparatus and method.
The main notations in the figure: 1. a water inlet pipe; 2. a first reaction tank; 3. a reaction tank II; 4. a sedimentation tank; 5. a water outlet pipe; 6. an aeration pipe; 7. a stirrer; 8. a partition plate; 9. a baffle; 10. an air pump; 11. a dissolved oxygen meter probe, 12. an ORP electrode; 13. a reduction gear (also called a reduction motor); 14. a water passing port I; 15. a water outlet is formed; 16. a sludge return pipe; 17. a sludge reflux pump; 18. a diversion pipeline; 19. the control system is operated automatically.
Detailed Description
The invention provides a reinforced denitrification and dephosphorization sewage treatment technology.
Referring to fig. 1 and 2, a water inlet pipe 1 is connected with a sewage inlet to be treated at the upper part of a guide pipeline 18, a sludge return pipe 16 is connected with a sludge return port at the upper part of the guide pipeline, sewage enters the guide pipeline from the water inlet pipe and is mixed with return sludge in the pipeline to enter a reaction tank ①, the sewage is treated by a reaction tank ① and enters a reaction tank ① through a water passing port ① 114 on the partition plate, the sewage further enters a sedimentation tank 4 through a water passing port ① on the partition plate, the sewage is precipitated and then discharged by a water outlet pipe 5, the lower opening end at the bottom of the guide pipeline extends to the water level and the depth 2/3-3/4 of the sewage depth in the reaction tank ① after being treated, the upper part of the partition plate spaced from ① to the reaction tank ① 3 and the partition plate spaced from the reaction tank ① to the sedimentation tank are provided with overflow through holes and used as water passing ports for communicating the reaction tank ① with the reaction tank ① and the reaction tank ①, the reaction tank are respectively provided with an annular guide plate with a cross section near one side of the partition plate at one side near the partition plate, a semicircular guide plate 150 and a reaction tank 865 are arranged at the top of the reaction tank 865, the reaction tank 150-865, the reaction tank 100-598, the reaction tank is arranged at the side near the top of the reaction tank, the reaction tank 99-597 and the reaction tank, the reaction tank isAn aerator pipe, namely, air outlet holes (through holes) with the aperture range of 2-4mm are formed in the side wall of the aerator pipe, the spacing between the holes is 20-50 mm, one end of the aerator pipe is closed, the other end of the aerator pipe is connected with an air outlet of an air pump through a pipeline, stirrers in a reaction tank ① and a reaction tank ② are arranged at the lower part of the reaction tank and above the aerator pipe and are connected with a speed reducer, the cross section of a guide plate at one side, far away from the reaction tank ②, in the sedimentation tank is semicircular, the guide plate covers the inlet end of an outlet pipe, the top of the guide plate is 50-80mm higher than the horizontal plane of the top of the outlet pipe, the bottom of the guide plate is 100 mm below the horizontal plane of the bottom of the outlet pipe, the middle lower part of the side wall, far away from a partition plate, of the sedimentation tank is in an inclined plate design, namely, the middle lower part of the side wall is an inclined plane, the cross section of the middle lower part of the sedimentation tank is gradually reduced from top to bottom, the inclined angle of 50-60 degrees relative to the horizontal plane, the sludge return pipe inlet is connected with the sludge return pipe outlet of a sludge return pump 17 arranged at
II dissolved oxygen apparatus probe), ORP electrode (Hash digital ORP electrode) are connected, PLC gathers the signal of dissolved oxygen apparatus probe and ORP electrode, PLC is connected with electrical source controller, electrical source controller is connected with air pump, speed reducer, PLC passes through the switch of electrical source controller control air pump and speed reducer.
The specific operation of the processing device is as follows:
the device continuously feeds water, and the water fed into the water inlet pipe is sewage which is obtained by pretreating domestic sewage through a septic tank, an adjusting tank or a grid.
The hydraulic retention time of the first reaction tank and the second reaction tank is 3-6 hours respectively, and the sludge concentration is 3000-4000 mg/L.
The automatic operation control system records DO and ORP in the first reaction tank and the second reaction tank once every 1-2 minutes.
Sewage enters a diversion pipeline from a water inlet pipe, and enters a reaction tank I together with return sludge after being mixed in the pipeline, an air pump I is started through an automatic operation control system in the reaction tank I, a stirring speed reducer I is in a stop state, aeration quantity is adjusted, DO reaches 2mg/L within 30min, when the DO reaches 2mg/L, the air pump I is stopped to work through the automatic operation control system, the stirring speed reducer I is started, timing is started when ORP is less than-50 mv, the stirring speed reducer I is stopped to work through the automatic operation control system after 60min, the air pump I is started, and the operation is repeated; if ORP is still larger than-50 mv after the air pump (i) stops working for 150min, the stirring speed reducer (i) also stops working, and the air pump (i) is started. The aerobic, anoxic and anaerobic environment switching is formed in the same reaction tank by means of alternate aeration and stirring operation in the first reaction tank, so that the nitrification, denitrification, phosphorus release and phosphorus absorption reactions are realized while the degradation of organic matters is completed.
After the sewage is treated by the reaction tank I, the sewage enters the reaction tank II, a stirring speed reducer II is started through an automatic operation control system in the reaction tank II, an air pump II is in a stop state, when DO is less than 0.5mg/L and ORP is less than-50 mv, the air pump II is started, the stirring speed reducer II is stopped to work, timing is started at the same time, the stirring speed reducer II is started after 60min, the air pump II is stopped to work, and the operation is repeated; if the DO is less than 0.5mg/L and the ORP is less than-50 mv after the air pump II stops working for 60min, the air pump II is also started and the stirring speed reducer II stops working. And the reaction tank operates alternately through aeration and stirring to form the switching between aerobic and anoxic environments, further remove organic matters and enhance the removal effect of nitrogen and phosphorus.
The sewage is treated by the two-stage biochemical reaction tank, enters the sedimentation tank for sedimentation, and is discharged by the water outlet pipe.
Through actual monitoring, after the domestic sewage pretreated by the septic tank, the regulating tank or the grating is treated by the device, the COD of the effluent is less than 50mg/L, the total nitrogen is less than 10mg/L, and the total phosphorus is less than 1 mg/L.
Claims (10)
1. The utility model provides a domestic sewage treatment plant of intensive nitrogen and phosphorus removal which characterized in that:
comprises a sewage treatment tank or a sewage treatment container with an opening at the upper end, and a first reaction tank, a second reaction tank and a sedimentation tank which are separated by a partition plate and are not communicated with each other are sequentially arranged from left to right;
a diversion pipeline is arranged on the left side in the reaction tank I, the lower opening end of the diversion pipeline is positioned at the lower part of the reaction tank I, the upper opening end of the diversion pipeline is positioned above the sewage liquid level at the upper part of the reaction tank I, a sludge return port connected with the outlet of a sludge return pipe and a sewage inlet to be treated connected with the water inlet pipe of the sewage to be treated are arranged at the upper part of the diversion pipeline, and the diversion pipeline forms a four-way pipe; the inlet of the sludge return pipe is connected with the outlet of a sludge return pump arranged at the middle lower part of the sedimentation tank, so that sludge can return to the first reaction tank;
the upper part of a partition plate which is spaced from the reaction tank II is provided with overflow through holes which are communicated with the reaction tank I and the reaction tank II and are used as water passing ports, the left side and the right side of each overflow through hole are respectively provided with an annular guide plate with a notch at the cross section close to one side of the partition plate, the end surface of the notch at the cross section of each guide plate is attached or fixedly connected with the partition plate, each overflow through hole is positioned between the guide plates at the two sides of the partition plate, and sewage in the reaction tank I is guided by the guide plates at the left sides of the partition plates through the overflow through holes and then guided by the guide plates at the right sides of the;
the upper part of a partition plate which is spaced from the sedimentation tank in the reaction tank II is provided with an overflow through hole which is communicated with the reaction tank II and the sedimentation tank and is used as a water passing port, the left side and the right side of the overflow through hole are respectively provided with an annular guide plate with a notch close to one side of the partition plate, the end surface of the notch of the cross section of the guide plate is attached or fixedly connected with the partition plate, the overflow through hole is positioned between the guide plates at the two sides of the partition plate, and sewage in the reaction tank II is guided by the guide plates at the left sides of the partition plates by virtue of water level difference, then is guided by;
a water outlet pipe is arranged on the side wall surface of the upper part of the sedimentation tank, an annular guide plate with a notch at the cross section close to one side of the inlet of the water outlet pipe is arranged at the inlet of the water outlet pipe in the sedimentation tank, and the end surface of the notch of the cross section of the guide plate is attached or fixedly connected with the side wall surface where the water outlet pipe is positioned; the sewage in the sedimentation tank is guided by a guide plate by means of water level difference and then flows out of the sedimentation tank through a water outlet pipe;
an aeration pipe, a stirrer, a Dissolved Oxygen (DO) measuring instrument probe for measuring Dissolved Oxygen (DO) in the sewage and an ORP electrode for measuring oxidation-reduction potential (ORP) in the sewage are respectively arranged in the first reaction tank and the second reaction tank;
aeration pipes positioned at the inner lower part of the first reaction tank and the second reaction tank are respectively connected with an air pump through air ducts, and a stirrer is driven by a speed reducer.
2. The sewage treatment apparatus of claim 1, wherein:
the device is equipped with an automatic operation control system, records data and controls the operation of the device;
the automatic operation control system is composed of a PLC and a power supply controller, the PLC is connected with a dissolved oxygen measuring instrument probe and an ORP electrode, the PLC is connected with the power supply controller, the power supply controller is connected with an air pump and a speed reducer, and the PLC controls the on-off of the air pump and the speed reducer through the power supply controller and records DO and ORP in sewage.
3. The sewage treatment apparatus of claim 1, wherein:
the device comprises a reaction tank I, a reaction tank II and a sedimentation tank; the sewage treatment system is integrally designed, and is provided with a water inlet pipe and a water outlet pipe, wherein each tank body is separated by a partition plate, and is sequentially separated into a reaction tank I, a reaction tank II and a sedimentation tank according to the sewage flow direction (from left to right), and sewage flows in a self-flow mode depending on the water level difference;
the end surfaces of the front end and the rear end of the clapboard and the lower end surface are respectively connected with the inner wall surface of the sewage treatment tank or the sewage treatment container in a sealing way;
the middle-lower part of the side wall of the sedimentation tank far away from the partition board is designed to be an inclined plate, namely, the middle-lower part of the side wall surface is an inclined plane, so that the cross section of the middle-lower part of the sedimentation tank is gradually reduced from top to bottom, and the inclination angle of the inclined plane (relative to the horizontal plane) is 50-60 degrees.
4. The sewage treatment apparatus according to claim 1, 2 or 3, wherein:
the guide plate positioned in the first reaction tank is a guide plate with a semicircular cross section, the guide plate covers the opening end of the water passing port positioned in the first reaction tank, a gap is reserved between the top of the water passing port and the top of the partition plate, and the water passing port on the partition plate is covered by the guide plate with a semicircular cross section; the top of the guide plate is 50-80mm higher than the horizontal plane on which the top of the water passing port is positioned, and the bottom of the guide plate is 100-150mm below the horizontal plane on which the bottom of the water passing port is positioned;
the guide plate positioned in the second reaction tank and close to one side of the first reaction tank is a guide plate with a semicircular cross section, the guide plate covers the opening end of the water passing port positioned in the second reaction tank, a gap is reserved between the top of the water passing port and the top of the partition plate, and the water passing port on the partition plate is covered by the guide plate with a semicircular cross section; the top of the guide plate is higher than the water level of the top of the water outlet by 50-80mm, and the bottom of the guide plate is positioned at the water depth of 2/3-3/4 of the depth of the sewage in the reaction tank II (the depth of the sewage in the reaction tank II is 1-3 m);
the guide plate positioned in the second reaction tank and close to one side of the sedimentation tank is a guide plate with a semicircular cross section, the guide plate covers the opening end of the water passing port positioned in the second reaction tank, a gap is reserved between the top of the water passing port and the top of the partition plate, and the water passing port on the partition plate is covered by the guide plate with a semicircular cross section; the top of the guide plate is 50-80mm higher than the horizontal plane on which the top of the water passing port is positioned, and the bottom of the guide plate is 100-150mm below the horizontal plane on which the bottom of the water passing port is positioned;
the guide plate positioned in the sedimentation tank and close to one side of the reaction tank II is a guide plate with a semicircular cross section, the guide plate covers the opening end of the water passing port positioned in the sedimentation tank, a gap is reserved between the top of the water passing port and the top of the partition plate, and the water passing port on the partition plate is covered by the guide plate with a semicircular cross section; the top of the guide plate is higher than the water level of the top of the water outlet by 50-80mm, and the bottom of the guide plate is positioned at the water depth of 2/3-3/4 of the depth of the internal sewage of the reaction tank II (the depth of the internal sewage of the reaction tank II is 1-3 m);
the guide plate positioned in the sedimentation tank and far away from one side of the reaction tank II is a guide plate with a semicircular cross section, and the guide plate covers the inlet end of the water outlet pipe; the top of the guide plate is 50-80mm higher than the horizontal plane on which the top of the water outlet pipe is positioned, and the bottom of the guide plate is positioned below the horizontal plane on which the bottom of the water outlet pipe is positioned by 100-150 mm.
5. The sewage treatment apparatus according to claim 1, 2 or 3, wherein:
the aeration pipes in the first reaction tank and the second reaction tank are arranged at the bottom of the reaction tank and are perforated aeration pipes, namely, air outlet holes (through holes) with the aperture range of 2-4mm are formed in the side walls of the aeration pipes, the distance between the openings is 20-50 mm, one end of each aeration pipe is closed, and the other end of each aeration pipe is connected with an air outlet of an air pump through a pipeline;
the stirrer in the first reaction tank and the second reaction tank is arranged at the lower part of the reaction tank and above the aeration pipe, and the stirrer is connected with a speed reducer.
6. The sewage treatment apparatus according to claim 1, 2 or 3, wherein:
the water inlet pipe and the sludge return pipe of the sewage to be treated are connected with the diversion pipeline, the water inlet and the return sludge are mixed in the pipeline and then enter the reaction tank I, the lower opening end at the bottom of the diversion pipeline extends to the position below the water surface and at the depth of 2/3-3/4 of the depth of the sewage in the reaction tank I (the depth of the sewage in the reaction tank II is 1-3m), and the sludge return port on the diversion pipeline is positioned above the inlet of the sewage to be treated.
7. A method for treating domestic sewage by strengthening nitrogen and phosphorus removal comprises the following steps:
adopting the enhanced nitrogen and phosphorus removal domestic sewage treatment device of any one of claims 1 to 6;
the device continuously feeds water, and the water fed into the water inlet pipe is the sewage treated by the domestic sewage through the septic tank, or treated by the regulating tank of the domestic sewage treatment plant, or treated by the grating;
the sewage enters the reaction tank I, the reaction tank II and the sedimentation tank in sequence for treatment and then flows out of the water outlet pipe.
8. The wastewater treatment method according to claim 7, characterized in that: the hydraulic retention time of the first reaction tank and the second reaction tank is 3-6 hours respectively, and the sludge concentration is 3000-4000 mg/L.
9. The wastewater treatment method according to claim 7, characterized in that: the automatic operation control system records DO and ORP in the first reaction tank and the second reaction tank once every 1-2 minutes.
10. The sewage treatment method according to claim 7 or 9, characterized in that:
in the reaction tank, starting an air pump through an automatic operation control system, stopping a stirring speed reducer, adjusting aeration amount, enabling DO to reach 2mg/L within 30min, stopping the air pump through the automatic operation control system after the DO reaches 2mg/L, starting the stirring speed reducer, starting timing when ORP is less than-50 mv, stopping the stirring speed reducer through the automatic operation control system after 60min, starting the air pump, and repeatedly operating in the way; if ORP is still larger than-50 mv after the air pump (i) stops working for 150min, the stirring speed reducer (i) also stops working, and the air pump (i) is started;
in the reaction tank II, a stirring speed reducer is started through an automatic operation control system, an air pump II is in a stop state, when DO is less than 0.5mg/L and ORP is less than-50 mv, the air pump II is started, the stirring speed reducer is stopped to work, timing is started at the same time, the stirring speed reducer is started after 60min, the air pump II is stopped to work, and the operation is repeated; if the DO is less than 0.5mg/L and the ORP is less than-50 mv after the air pump II stops working for 60min, the air pump II is also started and the stirring speed reducer II stops working.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112875861A (en) * | 2021-01-18 | 2021-06-01 | 可事托环保设备（上海）有限公司 | Continuous water inlet and outlet multi-unit aerobic granular sludge reactor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200393442Y1 (en) * | 2005-06-01 | 2005-08-22 | 강원대학교산학협력단 | Wastewater treatment apparatus for controlling flow according to oxidation-reduction potential |
| CN1789174A (en) * | 2005-12-19 | 2006-06-21 | 东南大学 | Activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots |
| CN201077805Y (en) * | 2007-06-15 | 2008-06-25 | 北京工业大学 | A2O+A/O process seprobia denitrification phosphorus removal experiment teaching device |
| WO2009119964A1 (en) * | 2008-03-26 | 2009-10-01 | Sam Chang Enterprise Co., Ltd. | Advanced wastewater treatment apparatus with two-stage reactor |
| CN101987760A (en) * | 2009-07-31 | 2011-03-23 | 辽宁北方环境保护有限公司 | Horizontal underflow constructed wetland capable of strengthening denitrification at low temperature |
| CN105366888A (en) * | 2015-11-26 | 2016-03-02 | 暨南大学 | Method and apparatus for depth nitrogen and phosphorus removal from small-flow sewage |
| CN213085586U (en) * | 2020-07-01 | 2021-04-30 | 辽宁省生态环境保护科技中心 | Domestic sewage treatment device for strengthening nitrogen and phosphorus removal |
-
2020
- 2020-07-01 CN CN202010626204.1A patent/CN111675335A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200393442Y1 (en) * | 2005-06-01 | 2005-08-22 | 강원대학교산학협력단 | Wastewater treatment apparatus for controlling flow according to oxidation-reduction potential |
| CN1789174A (en) * | 2005-12-19 | 2006-06-21 | 东南大学 | Activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots |
| CN201077805Y (en) * | 2007-06-15 | 2008-06-25 | 北京工业大学 | A2O+A/O process seprobia denitrification phosphorus removal experiment teaching device |
| WO2009119964A1 (en) * | 2008-03-26 | 2009-10-01 | Sam Chang Enterprise Co., Ltd. | Advanced wastewater treatment apparatus with two-stage reactor |
| CN101987760A (en) * | 2009-07-31 | 2011-03-23 | 辽宁北方环境保护有限公司 | Horizontal underflow constructed wetland capable of strengthening denitrification at low temperature |
| CN105366888A (en) * | 2015-11-26 | 2016-03-02 | 暨南大学 | Method and apparatus for depth nitrogen and phosphorus removal from small-flow sewage |
| CN213085586U (en) * | 2020-07-01 | 2021-04-30 | 辽宁省生态环境保护科技中心 | Domestic sewage treatment device for strengthening nitrogen and phosphorus removal |
Non-Patent Citations (1)
| Title |
|---|
| 冯欣: "脱氮除磷一体化污水处理装置运行性能研究", 《环境保护与循环经济》, no. 12, 15 December 2020 (2020-12-15), pages 17 - 20 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112875861A (en) * | 2021-01-18 | 2021-06-01 | 可事托环保设备（上海）有限公司 | Continuous water inlet and outlet multi-unit aerobic granular sludge reactor |
| CN112875861B (en) * | 2021-01-18 | 2023-09-26 | 可事托环保设备（上海）有限公司 | Multi-unit aerobic granular sludge reactor capable of continuously feeding and discharging water |
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