CN107473495B - Integrated circulating biochemical sewage treatment equipment and related method thereof - Google Patents
Integrated circulating biochemical sewage treatment equipment and related method thereof Download PDFInfo
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- CN107473495B CN107473495B CN201610407197.XA CN201610407197A CN107473495B CN 107473495 B CN107473495 B CN 107473495B CN 201610407197 A CN201610407197 A CN 201610407197A CN 107473495 B CN107473495 B CN 107473495B
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- 239000010865 sewage Substances 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims description 33
- 239000010802 sludge Substances 0.000 claims abstract description 236
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 114
- 238000004062 sedimentation Methods 0.000 claims abstract description 107
- 238000010992 reflux Methods 0.000 claims abstract description 67
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 71
- 238000011010 flushing procedure Methods 0.000 claims description 64
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 239000002351 wastewater Substances 0.000 claims description 19
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 238000011001 backwashing Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000005276 aerator Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000001546 nitrifying effect Effects 0.000 claims description 4
- 230000003116 impacting effect Effects 0.000 claims description 3
- 238000006396 nitration reaction Methods 0.000 claims description 3
- 125000001477 organic nitrogen group Chemical group 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 241000255925 Diptera Species 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 1
- IBIRZFNPWYRWOG-UHFFFAOYSA-N phosphane;phosphoric acid Chemical compound P.OP(O)(O)=O IBIRZFNPWYRWOG-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The integrated circulating biochemical sewage treatment equipment comprises a water inlet channel, a mud and water mixing zone, an anoxic zone, an aerobic zone, a sedimentation water inlet zone and a sedimentation zone which are connected in sequence in an upstream-downstream relation, wherein the anoxic zone is connected with the aerobic zone through a gas stripping circulating pipe; the sedimentation zone is connected with the sludge reflux main channel through the first gas stripping sludge reflux pipe, or the sedimentation zone is connected with the sludge reflux main channel through the first gas stripping sludge reflux pipe and a sludge reflux branch pipe or a branch channel in sequence; the sedimentation area is also connected with a water outlet and discharging device. The sewage treatment device is particularly suitable for villages and towns, living areas in living concentration areas, scenic spot living areas and the like; the device has the characteristics of relatively small investment, strong pertinence, mature technology, simple structure, stable performance, long service life, small occupied area, low operation cost, safe and reliable operation, convenient maintenance and management and the like.
Description
Technical Field
The invention relates to the technical field of sewage treatment.
Background
According to the actual running conditions of current small sewage treatment facilities or devices in villages and towns and concentrated living areas at home and abroad, the conventional sewage treatment process is generally adopted, such as: the contact oxidation method (containing AO or A2/O type), small oxidation ditch, CASS (SBR series) and the like, the treatment process flow is long, the operation management requirement needs corresponding professional technicians, and the technical support cannot be provided by corresponding technical managers especially for remote villages and towns. When the sewage treatment process needs to be improved, the ammonia nitrogen is required to be less than or equal to 5 (8) mg/L by adopting the conventional treatment process; the total nitrogen is less than or equal to 15mg/L, the reflux energy consumption of the nitrified liquid in the conventional process is high, and the running cost of sewage treatment can be greatly increased if the concentration of ammonia nitrogen and total nitrogen is required to be lower.
Using conventional processing equipment such as: MBR membrane equipment, integrated buried equipment, biological rotating disk or biological rotating wheel and other forms have the problems of high operation cost, high daily maintenance cost, certain potential safety hazards in operation management, unstable standard reaching of effluent, pump backflow in nitrifying liquid backflow or sludge backflow and the like, complex sewage treatment system and the like. If the conventional pond oxidation treatment technology, the artificial rapid filtration technology, the anaerobic and artificial wetland sewage treatment technology or the unpowered domestic sewage purification device and other technologies are adopted, although the operation cost is low, the influence on the surrounding environment (mainly odor and mosquitoes and flies) exists in the operation process, the operation is unstable, the filter layer is blocked, the wetland is seasonally unstable, the effluent quality cannot reach the standard stably, and the floor area is large.
Disclosure of Invention
In order to accelerate the construction pace of small town sewage treatment facilities, and to improve town water ecology and improve the quality of the living environment and promote sustainable healthy development of small town economy and society, an integrated corrosion-resistant sewage treatment device with mature and reliable process technology, strong corrosion resistance, low operation cost and simple management and maintenance, and a related sewage treatment method, a residual sludge discharge method and a back flushing method are needed.
The invention aims to answer the aim of the invention, and provides the technical scheme that: provides an integrated circulating biochemical sewage treatment device:
comprises a water inlet channel, a mud and water mixing zone, an anoxic zone, an aerobic zone, a sedimentation water inlet zone and a sedimentation zone which are connected in sequence in an upstream-downstream relation,
Wherein the anoxic zone is connected with the aerobic zone through a gas stripping circulating pipe;
The sedimentation zone is connected with the sludge reflux main channel through the first gas stripping sludge reflux pipe, or the sedimentation zone is connected with the sludge reflux main channel through the first gas stripping sludge reflux pipe and a sludge reflux branch pipe or a branch channel in sequence;
The sedimentation area is also connected with a water outlet and discharging device.
According to the technical proposal, the integrated circulating biochemical sewage treatment equipment,
The sludge discharge device comprises a sludge return branch pipe or a branch canal and a second air pipe at the bottom of the gas stripping sludge return pipe;
The bottom air pipe of the second gas stripping sludge return pipe is arranged in the sedimentation zone, one end of the sludge return branch pipe or the branch canal is connected with the sludge return main canal, the other end of the sludge return branch pipe or the branch canal is connected with the residual sludge discharge pipe, and the sludge return branch pipe or the branch canal is also connected with a first gas stripping sludge return pipe and a sludge outlet of the bottom air pipe of the second gas stripping sludge return pipe;
A first electromagnetic valve or a gate is arranged on the sludge backflow branch pipe or the branch canal between the sludge outlet of the sludge backflow branch pipe or the branch canal and the sludge outlet of the air pipe at the bottom of the second gas stripping sludge backflow pipe, and a second electromagnetic valve or a gate is arranged on the sludge backflow branch pipe or the branch canal between the sludge outlet of the air pipe at the bottom of the second gas stripping sludge backflow pipe and the residual sludge discharge pipe;
Under the normal sewage treatment state, the first electromagnetic valve or gate is in an open state, the second electromagnetic valve or gate is in a closed state, and the sedimentation zone is respectively connected with a sludge backflow main channel through a first gas stripping sludge backflow pipe and a second gas stripping sludge backflow pipe bottom air pipe and a sludge backflow branch pipe or a branch channel;
In the state of discharging the surplus sludge, the first electromagnetic valve or the brake is in a closed state, the second electromagnetic valve or the brake is in an open state, the sedimentation zone is connected with the sludge backflow main channel through the first gas stripping sludge backflow pipe and the sludge backflow branch pipe or the branch channel in sequence, and the sedimentation zone is connected with the surplus sludge discharge pipe through the second gas stripping sludge backflow pipe and the sludge backflow branch pipe or the branch channel in sequence.
According to the technical scheme, the water outlet and discharge device of the integrated circulating biochemical sewage treatment equipment comprises a total water collecting pipe or channel and at least one water collecting channel arranged at the top of the sedimentation zone, wherein a water outlet of the water collecting channel is connected with the water outlet and discharge pipe through the total water collecting pipe or channel.
According to the technical scheme, the integrated circulating biochemical sewage treatment equipment further comprises a back flushing device, wherein the back flushing device comprises a back flushing air pipe for providing compressed air for back flushing and a back flushing device connected with the back flushing air pipe, and the back flushing device is arranged at the lower part of the sedimentation zone; the back flushing device also comprises a back flushing waste water outlet arranged on the main water collecting pipe or the canal, and the back flushing waste water outlet is connected with a back flushing waste water discharge pipe;
The water outlet discharge pipe is provided with a third electromagnetic valve, the backwash wastewater discharge pipe is provided with a fifth electromagnetic valve, and the backwash air pipe is provided with a fourth electromagnetic valve;
in the normal sewage treatment state, the third electromagnetic valve is in an open state, and the fourth electromagnetic valve is in a closed state;
in the back flushing state, the third electromagnetic valve is in a closed state, the fourth electromagnetic valve is in an open state, and the fifth electromagnetic valve is in an open state.
According to the technical scheme, the backwash device of the integrated circulating biochemical sewage treatment equipment is at least one perforated pipe with an upward perforated hole arranged in the sedimentation zone.
According to the technical scheme, the integrated circulating biochemical sewage treatment equipment further comprises an air supply device, wherein the air supply device comprises a total air pipe and a plurality of air pipes branched from the total air pipe, and the air pipes branched from the total air pipe are respectively connected with a bottom pipe of a gas stripping circulating pipe for supplying air to the gas stripping circulating pipe, a bottom air pipe of a first gas stripping sludge return pipe for supplying air to the first gas stripping sludge return pipe, a bottom air pipe of a second gas stripping sludge return pipe for supplying air to the second gas stripping sludge return pipe, a backwash air pipe for supplying air to the backwash device and an aerator in an aerobic zone.
According to the technical scheme, the air stripping circulation pipe bottom pipe of the integrated circulating biochemical sewage treatment device is provided with the third manual regulating valve, the first manual regulating valve is arranged on the air pipe at the bottom of the first air stripping sludge return pipe, and the second manual regulating valve is arranged on the air pipe at the bottom of the second air stripping sludge return pipe.
According to the technical scheme, one side of the aerobic zone of the integrated circulating biochemical sewage treatment equipment is sequentially provided with an anoxic zone, a water inlet channel, a mud-water mixing zone, a mud return main channel sedimentation zone and a sedimentation water inlet zone from left to right or from right to left.
According to the technical scheme, the sludge reflux branch pipe or the branch canal of the integrated circulating biochemical sewage treatment equipment is arranged at one side of the sedimentation zone, which is close to the aerobic zone.
According to the technical scheme, the sedimentation zone of the integrated circulating biochemical sewage treatment equipment is an inclined tube sedimentation tank or a contact sedimentation tank.
The sewage treatment method of the integrated circulating biochemical sewage treatment equipment according to the technical scheme comprises the following steps:
the pretreated sewage water inlet pipe enters the water inlet channel to be distributed by the weir, and then is fully mixed with the return sludge of the sludge return main channel in the sludge-water mixing area, and enters the anoxic area; mixing the mixed liquid with the nitrifying mixed liquid with internal reflux in an anoxic zone, and then performing anoxic denitrification; the sewage after anoxic denitrification is lifted by the gas stripping circulating pipe and enters an aerobic zone to be oxidized into CO2 and H2O as carbon sources, and the oxidization and the nitration of ammonia nitrogen and organic nitrogen are carried out; sewage passing through the aerobic zone enters a sedimentation water inlet zone and then enters a sedimentation zone, SS, CODCr, BOD, chemical phosphorus phosphate and the like in the sewage are removed through the sedimentation zone, and finally the sewage is discharged through a water outlet discharge device;
Wherein the first and/or second gas-stripping sludge return pipes are used for conveying the sludge to the sludge return main channel through a return branch pipe or a branch channel after extracting the sludge from the sedimentation zone.
The method for discharging excess sludge of the integrated circulating biochemical sewage treatment equipment according to the technical scheme comprises the following steps of: closing the first electromagnetic valve or gate and opening the second electromagnetic valve or gate; the sludge lifted from the settling zone by the second sludge return pipe is discharged through the excess sludge discharge pipe.
The back flushing method of the integrated circulating biochemical sewage treatment equipment according to the technical scheme comprises the following steps:
when back flushing is carried out, the third electromagnetic valve is closed, the fourth electromagnetic valve is opened, the fifth electromagnetic valve is opened, compressed air entering from the back flushing air pipe 16 enters a back flushing device j through an air pipe 13, the back flushing device j is at least one open-pore pipe with upward open pores arranged below a contact layer of a contact sedimentation tank, and the actual quantity is more required to be set; punching out the compressed air perforated pipe, and impacting sludge at the bottom of the contact layer of the contact sedimentation tank from bottom to top; part of the sludge is flushed down and sunk into the bottom of the contact sedimentation tank G, and the other part passes through the contact layer under the drive of compressed air, and is sequentially discharged to a factory sewage pipe network through a backwash wastewater discharge pipe 8 after passing through a water collecting channel 3 and a main water collecting pipe or a channel 4, enters a lifting pump station or a factory sewage tank, and enters the sewage treatment equipment again for treatment;
After the back flushing is finished, the fourth electromagnetic valve is firstly closed for 1-2 minutes, then the third electromagnetic valve is opened, and meanwhile, the fifth electromagnetic valve is closed, so that after the back flushing is stopped, the back flushing sludge can be discharged through a back flushing wastewater discharge pipe, and then standard water is discharged through a water outlet discharge pipe normally.
The invention has the advantages that: the invention provides an integrated circulating biochemical sewage treatment device, which is particularly suitable for villages and towns, living areas, scenic spot living areas and the like; the device has the characteristics of relatively small investment, strong pertinence, mature technology, simple structure, stable performance, corrosion resistance, long service life, small occupied area, low operation cost (generally 0.3 yuan/ton water), safe and reliable operation, convenient maintenance and management and the like, and can be designed and manufactured according to different sewage treatment scales. The quality of the treated effluent directly reaches the first-level A emission standard of pollutant emission standard of urban sewage treatment plant (GB 18918-2002).
Drawings
FIG. 1 is a schematic view of the overall planar arrangement of the present invention
FIG. 2 is a schematic view of the present invention in section 1-1
In the figure, a water inlet pipe (1), a gas stripping circulating pipe (2), a water collecting channel (3), a main water collecting pipe or channel (4), a water outlet discharge pipe (5), a sludge backflow branch pipe or branch channel (6), a residual sludge discharge pipe (7), a backwash wastewater discharge pipe (8), a first gas stripping sludge backflow pipe (9), a second gas stripping sludge backflow pipe (10), a first gas stripping sludge backflow pipe bottom air pipe (11), a second gas stripping sludge backflow pipe bottom air pipe (12), an air pipe (13), a main air pipe (14), a gas stripping circulating pipe bottom pipe (15), a backwash air pipe (16) and a sludge bucket (17); a water inlet channel (A), a sludge backflow main channel (B), a sludge and water mixing zone (C), an anoxic zone (D), an aerobic zone (E), a sedimentation water inlet zone (F) and a sedimentation zone (G); the device comprises a first electromagnetic valve or gate (a), a second electromagnetic valve or gate (b), a third electromagnetic valve (c), a fourth electromagnetic valve (d), a first manual regulating valve (e), a second manual regulating valve (f), a third manual regulating valve (g), a fifth electromagnetic valve (h) and a backwash device (j).
Detailed Description
In summary, the invention is an integrated sewage treatment device which integrates a sewage biochemical treatment process (including an activated sludge process, a contact oxidation process or a sewage biochemical treatment process combining the activated sludge process and the contact oxidation process) and a sediment (the sediment form can adopt horizontal sedimentation, vertical sedimentation, inclined tube sedimentation, contact sedimentation and the like according to the requirement of effluent quality target) into a similar oxidation ditch form, and simultaneously adopts a gas stripping principle to drive sewage in the integrated sewage treatment device to flow, the sludge is refluxed and discharged, and the gas stripping form is adopted to replace the traditional pump or submerged impeller and other mechanical reflux, so that the invention is particularly suitable for a small integrated sewage treatment device. The sewage treatment device is made of 304 stainless steel and other corrosion-resistant materials, and has good overall corrosion resistance.
The following detailed description of the present invention, taken in conjunction with the accompanying drawings, will clearly and fully describe the technical solutions of the embodiments of the present invention, it being evident that the described embodiments are only some, but not all, embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, the integrated circulating biochemical sewage treatment equipment comprises a water inlet channel A, a mud-water mixing zone C, an anoxic zone D, an aerobic zone E, a sedimentation water inlet zone F and a sedimentation zone G which are connected in sequence in an upstream-downstream relation, wherein the anoxic zone D is connected with the aerobic zone E through a gas stripping circulating pipe 2.
The integrated circulating biochemical sewage treatment equipment also comprises a sludge reflux device, wherein the sludge reflux device comprises a sludge reflux main channel B and a first gas-stripping sludge reflux pipe 9 which are connected with the upstream of the sludge and water mixing zone C, the sedimentation zone G is connected with the sludge reflux main channel B through the first gas-stripping sludge reflux pipe 9, or the sedimentation zone G is connected with the sludge reflux main channel B through the first gas-stripping sludge reflux pipe 9 and a sludge reflux branch pipe or branch channel 6 in sequence; the sedimentation area G is also connected with a water outlet discharge device.
The integrated circulating biochemical sewage treatment equipment also comprises a sludge discharge device, wherein the sludge discharge device comprises a sludge backflow branch pipe or canal 6 and a second air stripping sludge backflow pipe bottom air pipe 12; the bottom air pipe 12 of the second gas stripping sludge reflux pipe is arranged in the sedimentation zone G, one end of the sludge reflux branch pipe or branch canal 6 is connected with the sludge reflux main canal B, the other end is connected with the residual sludge discharge pipe 7, and the sludge reflux branch pipe or branch canal 6 is also connected with a first gas stripping sludge reflux pipe 9 and a sludge outlet of the bottom air pipe 12 of the second gas stripping sludge reflux pipe; a first electromagnetic valve or brake a is arranged on the sludge backflow branch pipe or branch canal 6 between the sludge outlet of the sludge backflow branch pipe or branch canal 6 and the sludge outlet of the air pipe 12 at the bottom of the second gas stripping sludge backflow pipe, and a second electromagnetic valve or brake b is arranged on the sludge backflow branch pipe or branch canal 6 between the sludge outlet of the air pipe 12 at the bottom of the second gas stripping sludge backflow pipe and the residual sludge discharge pipe 7.
Under the normal sewage treatment state, the first electromagnetic valve or gate a is in an open state, the second electromagnetic valve or gate B is in a closed state, and the sedimentation zone G is respectively connected with the sludge backflow main channel B through the sludge backflow branch pipe or branch channel 6 by the first air stripping sludge backflow pipe 9 and the second air stripping sludge backflow pipe bottom air pipe 12.
In the state of discharging the surplus sludge, the first electromagnetic valve or gate a is in a closed state, the second electromagnetic valve or gate B is in an open state, the sedimentation zone G is connected with the sludge backflow main channel B through the first gas stripping sludge backflow pipe 9 and the sludge backflow branch pipe or branch channel 6 in sequence, and the sedimentation zone G is connected with the surplus sludge discharge pipe 7 through the second gas stripping sludge backflow pipe 10 and the sludge backflow branch pipe or branch channel 6 in sequence.
The water outlet and discharge device comprises a main water collecting pipe or channel 4 and at least one water collecting channel 3 arranged at the top of the sedimentation zone G, and a water outlet of the water collecting channel 3 is connected with a water outlet and discharge pipe 5 through the main water collecting pipe or channel 4.
The integrated circulating biochemical sewage treatment equipment also comprises a back flushing device, wherein the back flushing device comprises a back flushing air pipe 16 for providing back flushing compressed air and a back flushing device j connected with the back flushing air pipe 16, and the back flushing device j is arranged at the lower part of the sedimentation zone G; the back flushing device also comprises a back flushing waste water outlet arranged on the main water collecting pipe or the canal 4, and the back flushing waste water outlet is connected with a back flushing waste water discharge pipe 8; the water outlet discharge pipe 5 is provided with a third electromagnetic valve c, the backwash wastewater discharge pipe 8 is provided with a fifth electromagnetic valve h, and the backwash air pipe 16 is provided with a fourth electromagnetic valve d.
In the normal sewage treatment state, the third electromagnetic valve c is in an on state, and the fourth electromagnetic valve d is in an off state; in the back flushing state, the third electromagnetic valve c is in a closed state, the fourth electromagnetic valve d is in an open state, and the fifth electromagnetic valve h is in an open state.
The backwashing device j is at least one open-pore pipe which is arranged on the upward open pore of the sedimentation zone G.
The integrated circulating biochemical sewage treatment equipment further comprises an air supply device, wherein the air supply device comprises a total air pipe 14 and a plurality of air pipes 13 branched from the total air pipe 14, and the air pipes 13 branched from the total air pipe 14 are respectively connected with a gas stripping circulation pipe bottom pipe 15 for supplying air to the gas stripping circulation pipe 2, a first gas stripping sludge return pipe bottom air pipe 11 for supplying air to the first gas stripping sludge return pipe 9, a second gas stripping sludge return pipe bottom air pipe 12 for supplying air to the second gas stripping sludge return pipe 10, a backwashing air pipe 16 for supplying air to the backwashing device and an aerator of the aerobic zone E.
The bottom pipe 15 of the gas stripping circulation pipe is provided with a third manual adjusting valve g, the bottom air pipe 11 of the first gas stripping sludge return pipe is provided with a first manual adjusting valve e, and the bottom air pipe 12 of the second gas stripping sludge return pipe is provided with a second manual adjusting valve f. Through adjusting these manual governing valves, the flow size of corresponding gas pipe, conveniently carry out the control of each flow to this integrative circulating biochemical sewage treatment equipment.
In order to approximate the land and facilitate the sewage or sludge circulation among the areas, the following arrangement is made for the position relationship of the areas: one side of the aerobic zone E is sequentially arranged into an anoxic zone D, a water inlet channel A, a mud and water mixing zone C, a mud return main channel B sedimentation zone G and a sedimentation water inlet zone F from left to right or from right to left. The sludge return branch pipe or canal 6 is arranged at one side of the sedimentation zone G close to the aerobic zone E. The main header or canal 4 is arranged at the side of the sedimentation zone G remote from said aerobic zone E. The above positional relationship and connection relationship of the respective areas have the following advantages:
1. the air supply devices can be basically arranged on a line, which is convenient for laying, maintaining and saving the consumption of the air supply pipeline. Such as: the bottom pipe 15 of the gas stripping circulation pipe, the bottom air pipe 11 of the first gas stripping sludge return pipe and the bottom air pipe 12 of the second gas stripping sludge return pipe are on the same line, and the aerator is also adjacent to the pipeline, so that the pipeline length is reduced;
2. The small anoxic zone D, the water inlet channel A, the mud and water mixing zone C, the sedimentation zone G of the mud reflux main channel B and the sedimentation water inlet zone F are arranged at one side of the maximum aerobic zone E, so that land resources which are favorable for repetition are not wasted due to unfilled corners, bulges and the like;
3. The mud and water discharged from the mud and water mixing zone C enter from the anoxic zone D, then flow into one end of the aerobic zone E from the gas stripping circulating pipe 2 at the other end of the anoxic zone D, and flow out from the sediment water inlet zone F at the other end of the aerobic zone E; thus fully utilizing the whole anoxic zone D and the aerobic zone E;
4. the sludge backflow branch pipe or the branch canal 6 can be used for both sludge backflow and redundant sludge discharge, so that the structure of the integrated circulating biochemical sewage treatment equipment is simplified, and the construction and maintenance costs are balanced;
5. The water collecting channel 3 and the main water collecting pipe or channel 4 can be used for discharging up-to-standard tail water and back flushing sewage, so that the structure of the integrated circulating biochemical sewage treatment equipment is simplified, and the construction and maintenance costs are balanced.
The anoxic zone D and the aerobic zone E can select the prior art and equipment, and comprise an activated sludge process, a contact oxidation process or a sewage biochemical treatment process combining the activated sludge process and the contact oxidation process. The present invention is not limited thereto.
The sedimentation zone G can select the existing sedimentation technology and equipment, for example, the sedimentation form can adopt horizontal sedimentation, vertical sedimentation, inclined tube sedimentation, contact sedimentation and the like according to the requirement of the effluent quality target, and the invention is not limited. In this embodiment, the sedimentation zone G is a chute sedimentation tank or a contact sedimentation tank, and the case of selecting a contact sedimentation tank is specifically described.
A sludge hopper 17 for accumulating sludge is arranged below the bottom air pipe 11 of the first stripping sludge return pipe and the bottom air pipe 12 of the second stripping sludge return pipe, so that sludge can be conveniently extracted, and accumulated sludge which cannot be recycled is reduced.
The sewage treatment process comprises the following steps: when sewage is treated normally, the first electromagnetic valve or gate a is in an open state, the second electromagnetic valve or gate b is in a closed state, the third electromagnetic valve c is in an open state, the fourth electromagnetic valve d is in a closed state, the first manual regulating valve e is in an open state, the second manual regulating valve f is in an open state, the third manual regulating valve g is in an open state, and the fifth electromagnetic valve h is in a closed state. The pretreated sewage water inlet pipe 1 enters a water inlet channel A, water is distributed through a weir, and then the sewage water inlet pipe is fully mixed with the reflux sludge of a sludge reflux main channel B in a sludge-water mixing area C, and then enters an anoxic area D; mixing the anaerobic zone D with the nitrifying mixed solution with internal reflux, and performing anaerobic denitrification, wherein the anaerobic denitrification is performed by fully utilizing a carbon source (BOD 5) in the inlet water, and the denitrification rate is far higher than that performed by means of endogenous respiration; the sewage after anoxic denitrification enters an aerobic zone E to be oxidized into CO 2 and H 2 O by a carbon source after being lifted by a gas stripping circulating pipe 2, and the oxidization and the nitration of ammonia nitrogen and organic nitrogen are carried out; the sewage passing through the aerobic zone E enters a sedimentation water inlet zone F and then enters a sedimentation zone G, and SS, COD Cr、BOD5, chemical phosphate and the like in the sewage are removed through the contact sedimentation zone filter material, so that the quality of the effluent stably reaches the first-level A discharge standard of pollutant discharge Standard of urban sewage treatment plant (GB 18918-2002). When the air stripping circulating pipe 2 lifts sewage, compressed air is conveyed to the bottom of the horn mouth at the bottom of the air stripping circulating pipe 2 through the air stripping circulating pipe bottom pipe 15 to be released for air stripping. The size of the sewage reflux quantity is controlled and regulated by the opening degree of the third manual regulating valve g, and the sewage reflux quantity can also be automatically regulated by the electric regulating valve.
Sludge reflux and discharge of excess sludge: when sewage is treated normally, the first electromagnetic valve or gate a is in an open state, and the second electromagnetic valve or gate b is in a closed state; the sludge in the sedimentation tank is required to be refluxed, compressed air is conveyed to the bottom of a horn mouth at the bottom of the first gas-stripping sludge reflux pipe 9 through a bottom air pipe 11 of the first gas-stripping sludge reflux pipe, the sludge at the bottom of the contact sedimentation tank is lifted by gas stripping and is refluxed to a sludge reflux main channel B through a sludge reflux branch pipe or a branch channel 6, and the sludge is fully mixed with raw water in a sludge and water mixing area C after being distributed by a weir; meanwhile, compressed air can be conveyed to the bottom of the bell mouth at the bottom of the second gas-stripping sludge return pipe 10 through the bottom air pipe 12 of the second gas-stripping sludge return pipe to be released, the gas-stripping is carried out to lift the sludge at the bottom of the contact sedimentation tank and the sludge flows back to the sludge return main channel B through the sludge return branch pipe or the branch channel 6, and the sludge is fully mixed with raw water in the sludge-water mixing area C after being distributed by the weir.
When the surplus sludge is required to be discharged every day, the first electromagnetic valve or the brake a is in a closed state, and the second electromagnetic valve or the brake b is in an open state; the sludge lifted by the first sludge return pipe 9 returns to the sludge return main channel B, and the sludge lifted by the second sludge return pipe 10 is discharged out of the integrated sewage treatment equipment through the residual sludge discharge pipe 7. The sludge reflux quantity is controlled by the opening degree of the first manual regulating valve e and the second f of the manual regulating valve, and can be automatically regulated by the electric regulating valve.
The mud discharging time is determined according to the treatment scale and the water quality condition of the inlet water. Under a general scheme, the period of discharging excess sludge may be set to 24 hours.
Reflux of the mixed solution: the integrated sewage treatment equipment is similar to the mixed liquid internal reflux of an integrated oxidation ditch, and in order to ensure the total circulation of the mixed liquid internal reflux, sewage in the anoxic zone D is lifted to the aerobic zone E in the form of gas stripping sludge.
Backwashing of the precipitation zone G: when the contact sedimentation tank normally operates and filters, the third electromagnetic valve c is in an on state, the fourth electromagnetic valve d is in an off state, the fifth electromagnetic valve h is in an off state, and the integrated sewage treatment equipment is used for treating the tail water reaching the standard, and the tail water is discharged through the water collecting channel 3 and the total water collecting pipe or channel 4, the water is discharged through the water outlet discharge pipe 5 and is discharged after ultraviolet disinfection.
Taking a contact sedimentation tank as an example, during back flushing, when the back flushing is required after the contact sedimentation tank runs for 24 hours, the third electromagnetic valve c is in a closed state, the fourth electromagnetic valve d is in an open state, and the fifth electromagnetic valve h is opened at the same time; compressed air entering from a backwashing air pipe 16 enters a backwashing device j through an air pipe 13, wherein the backwashing device j is at least one open pipe with an upward open pore arranged below a contact layer of a contact sedimentation tank, and the actual quantity is more required to be set; punching out the compressed air perforated pipe, and impacting sludge at the bottom of the contact layer of the contact sedimentation tank from bottom to top; part of the sludge is flushed down and sunk into the bottom of the contact sedimentation tank G, and the other part passes through the contact layer under the drive of compressed air, and is discharged to a factory sewage pipe network through a backwash wastewater discharge pipe 8 after passing through a water collecting channel 3 and a main water collecting pipe or a channel 4 in sequence, and enters a lifting pump station or a factory sewage tank to enter the sewage treatment equipment again for treatment.
And the back flushing process is about 15-20 minutes, after the back flushing is finished, the fourth electromagnetic valve d is closed firstly, and after 1-2 minutes, the third electromagnetic valve c is opened, and the fifth electromagnetic valve h is closed at the same time. After the back flushing is stopped, the back flushing sludge is discharged through the back flushing wastewater discharge pipe 8, and the standard water is discharged through the water outlet discharge pipe 8.
If the inclined tube sedimentation tank is adopted, the flushing process and the principle are same as those of the sedimentation tank, and the backwashing device j is arranged below the inclined tube layer of the inclined tube sedimentation tank.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. The utility model provides an integrative circulating biochemical sewage treatment device which is characterized in that:
Comprises a water inlet channel (A), a mud-water mixing zone (C), an anoxic zone (D), an aerobic zone (E), a sedimentation water inlet zone (F) and a sedimentation zone (G) which are connected in sequence in an upstream-downstream relation,
Wherein the anoxic zone (D) is connected with the aerobic zone (E) through a gas stripping circulating pipe (2);
The device comprises a sludge reflux device, wherein the sludge reflux device comprises a sludge reflux main channel (B) and a first gas-stripping sludge reflux pipe (9), the sludge reflux main channel (B) is connected with the upstream of a sludge and water mixing zone (C), the sedimentation zone (G) is connected with the sludge reflux main channel (B) through the first gas-stripping sludge reflux pipe (9), or the sedimentation zone (G) is connected with the sludge reflux main channel (B) through the first gas-stripping sludge reflux pipe (9) and a sludge reflux branch pipe or a branch channel (6) in sequence;
the sedimentation area (G) is also connected with a water outlet and discharging device;
one side of the aerobic zone (E) is sequentially arranged into an anoxic zone (D), a water inlet channel (A), a mud and water mixing zone (C), a mud reflux main channel (B), a sedimentation zone (G) and a sedimentation water inlet zone (F) from left to right or from right to left;
The sedimentation zone is communicated with the anoxic zone at the lower part;
the bottom of the anoxic zone is obliquely arranged towards the position of the gas stripping circulating pipe.
2. The integrated circulating biochemical sewage treatment apparatus of claim 1, wherein:
the device also comprises a sludge discharge device, wherein the sludge discharge device comprises a sludge return branch pipe or a branch canal (6) and a second stripping sludge return pipe bottom air pipe (12);
The bottom air pipe (12) of the second gas stripping sludge reflux pipe is arranged in the sedimentation zone (G), one end of the sludge reflux branch pipe or the branch canal (6) is connected with the sludge reflux main canal (B), the other end is connected with the residual sludge discharge pipe (7), and the sludge reflux branch pipe or the branch canal (6) is also connected with a first gas stripping sludge reflux pipe (9) and a sludge outlet of the bottom air pipe (12) of the second gas stripping sludge reflux pipe;
A first electromagnetic valve or a brake (a) is arranged on the sludge backflow branch pipe or the branch canal (6) between the sludge outlet of the sludge backflow branch pipe or the branch canal (6) and the sludge outlet of the bottom air pipe (12) of the second gas stripping sludge backflow pipe, and a second electromagnetic valve or a brake (b) is arranged on the sludge backflow branch pipe or the branch canal (6) between the sludge outlet of the bottom air pipe (12) of the second gas stripping sludge backflow pipe and the residual sludge discharge pipe (7);
Under the normal sewage treatment state, a first electromagnetic valve or gate (a) is in an open state, a second electromagnetic valve or gate (B) is in a closed state, and a sedimentation zone (G) is respectively connected with a sludge backflow main channel (B) through a first gas stripping sludge backflow pipe (9) and an air pipe (12) at the bottom of the second gas stripping sludge backflow pipe and then through a sludge backflow branch pipe or a branch channel (6);
Under the state of discharging surplus sludge, the first electromagnetic valve or the brake (a) is in a closed state, the second electromagnetic valve or the brake (B) is in an open state, the sedimentation zone (G) is connected with the sludge backflow main channel (B) through the first gas stripping sludge backflow pipe (9) and the sludge backflow branch pipe or the branch channel (6) in sequence, and the sedimentation zone (G) is connected with the surplus sludge discharge pipe (7) through the second gas stripping sludge backflow pipe (10) and the sludge backflow branch pipe or the branch channel (6) in sequence.
3. The integrated circulating biochemical sewage treatment apparatus of claim 1, wherein: the water outlet and discharge device comprises a total water collecting pipe or channel (4) and at least one water collecting channel (3) arranged at the top of the sedimentation zone (G), and a water outlet of the water collecting channel (3) is connected with a water outlet and discharge pipe (5) through the total water collecting pipe or channel (4).
4. The integrated circulation type biochemical sewage treatment apparatus according to claim 3, wherein:
The device also comprises a back flushing device, wherein the back flushing device comprises a back flushing air pipe (16) for providing back flushing compressed air and a back flushing device (j) connected with the back flushing air pipe (16), and the back flushing device (j) is arranged at the lower part of the sedimentation zone (G); the back flushing device also comprises a back flushing waste water outlet arranged on the main water collecting pipe or the canal (4), and the back flushing waste water outlet is connected with a back flushing waste water discharge pipe (8);
the water outlet discharge pipe (5) is provided with a third electromagnetic valve (c), the backwash wastewater discharge pipe (8) is provided with a fifth electromagnetic valve (h), and the backwash air pipe (16) is provided with a fourth electromagnetic valve (d);
in the normal sewage treatment state, the third electromagnetic valve (c) is in an on state, and the fourth electromagnetic valve (d) is in an off state;
In the back flushing state, the third electromagnetic valve (c) is in a closed state, the fourth electromagnetic valve (d) is in an open state, and the fifth electromagnetic valve (h) is in an open state.
5. The integrated circulating biochemical sewage treatment apparatus of claim 4, wherein: the backwashing device (j) is at least one open-pore pipe which is arranged on the upward open pore of the sedimentation zone (G).
6. The integrated circulating biochemical sewage treatment apparatus of claim 4, wherein: the air supply device comprises a main air pipe (14) and a plurality of air pipes (13) branched from the main air pipe (14), wherein the air pipes (13) branched from the main air pipe (14) are respectively connected with a bottom air pipe (15) of a gas stripping circulating pipe for supplying air to the gas stripping circulating pipe (2), a bottom air pipe (11) of a first gas stripping sludge return pipe for supplying air to the first gas stripping sludge return pipe (9), a bottom air pipe (12) of a second gas stripping sludge return pipe for supplying air to the second gas stripping sludge return pipe (10), a back flushing air pipe (16) for supplying air to the back flushing device and an aerator of an aerobic zone (E).
7. The integrated circulating biochemical sewage treatment apparatus of claim 6, wherein: the air stripping circulating pipe bottom pipe (15) is provided with a third manual regulating valve (g), the first air stripping sludge return pipe bottom air pipe (11) is provided with a first manual regulating valve (e), and the second air stripping sludge return pipe bottom air pipe (12) is provided with a second manual regulating valve (f).
8. The integrated circulating biochemical sewage treatment apparatus of claim 1, wherein: the sludge reflux branch pipe or the branch canal (6) is arranged at one side of the sedimentation zone (G) close to the aerobic zone (E).
9. The integrated circulating biochemical sewage treatment apparatus of claim 1, wherein: the sedimentation zone (G) is an inclined tube sedimentation tank or a contact sedimentation tank.
10. The sewage treatment method of an integrated circulation type biochemical sewage treatment apparatus according to any one of claims 1 to 9, comprising the steps of:
The pretreated sewage water inlet pipe (1) enters the water inlet channel (A) to be distributed by a weir, and then is fully mixed with the returned sludge in the sludge and water mixing area (C) and enters the anoxic area (D) after being returned to the sludge and water returning main channel (B); mixing the mixed liquid with the nitrifying mixed liquid with internal reflux in an anoxic zone (D) and then performing anoxic denitrification; the sewage after anoxic denitrification enters an aerobic zone (E) to be oxidized into CO 2 and H 2 O by a carbon source after being lifted by a gas stripping circulating pipe (2), and the oxidization and the nitration of ammonia nitrogen and organic nitrogen are carried out; the sewage passing through the aerobic zone (E) enters a sedimentation water inlet zone (F) and then enters a sedimentation zone (G), SS, COD Cr、BOD5 and chemical phosphate in the sewage are removed through the sedimentation zone (G), and finally the sewage is discharged through a water outlet and discharge device;
wherein the first stripping sludge reflux pipe (9) and/or the second stripping sludge reflux pipe (10) are used for transporting the sludge to the sludge reflux main channel (B) through a reflux branch pipe or a branch channel (6) after extracting the sludge from the sedimentation zone (G).
11. The method for discharging surplus sludge of an integrated circulation type biochemical sewage treatment apparatus according to any one of claims 1 to 9, comprising the steps of: closing a first solenoid valve or gate (a) and opening a second solenoid valve or gate (b); the sludge lifted from the sedimentation zone (G) by the second sludge return pipe (10) is discharged through the excess sludge discharge pipe (7).
12. The backwash method of an integrated circulating biochemical sewage treatment apparatus according to any one of claims 1 to 9, comprising the following steps:
When back flushing is carried out, the third electromagnetic valve (c) is closed, the fourth electromagnetic valve (d) is opened, the fifth electromagnetic valve (h) is opened, compressed air entering from the back flushing air pipe (16) enters the back flushing device (j) through the air pipe (13), the back flushing device (j) is at least one open pipe with an upward open pore arranged below a contact layer of the contact sedimentation tank, and the actual quantity is more required to be set; punching out the compressed air perforated pipe, and impacting sludge at the bottom of the contact layer of the contact sedimentation tank from bottom to top; part of the sludge is flushed down and sunk into the bottom of the contact sedimentation tank (G), and the other part passes through the contact layer under the drive of compressed air, and is sequentially discharged to a factory sewage pipe network through a back flush wastewater discharge pipe (8) after passing through a water collecting channel (3) and a main water collecting pipe or a channel (4) and enters a lifting pump station or a factory sewage tank to enter the sewage treatment equipment again for treatment;
After the back flushing is finished, the fourth electromagnetic valve (d) is closed for 1-2 minutes, the third electromagnetic valve (c) is opened, and the fifth electromagnetic valve (h) is closed, so that after the back flushing is stopped, the back flushing-washed sludge can be discharged through the back flushing wastewater discharge pipe (8), and then the standard water is discharged through the water outlet discharge pipe (8) normally.
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| CN101205100B (en) * | 2007-12-18 | 2010-05-19 | 华南理工大学 | Integral combined process treatment reactor for city sewage |
| CN102765857A (en) * | 2012-08-06 | 2012-11-07 | 上海电力学院 | Sewage treatment system and application thereof |
| CN104129842A (en) * | 2013-05-03 | 2014-11-05 | 彭志新 | Single-tank integrated biochemical treatment process for sewage |
| CN103408194B (en) * | 2013-08-18 | 2014-06-18 | 武汉宝捷能环境工程技术有限公司 | Small sewage treatment hydrolysis and gas-stripping and precipitation technique method |
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