CN110436628A - A kind of improved oxidation ditch biochemical wastewater treatment system - Google Patents
A kind of improved oxidation ditch biochemical wastewater treatment system Download PDFInfo
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- CN110436628A CN110436628A CN201910753388.5A CN201910753388A CN110436628A CN 110436628 A CN110436628 A CN 110436628A CN 201910753388 A CN201910753388 A CN 201910753388A CN 110436628 A CN110436628 A CN 110436628A
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- oxidation ditch
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- sewage
- pac
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- 230000003647 oxidation Effects 0.000 title claims abstract description 213
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 213
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 17
- 239000010865 sewage Substances 0.000 claims abstract description 100
- 238000012544 monitoring process Methods 0.000 claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 241000894006 Bacteria Species 0.000 claims abstract description 29
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 14
- 238000005273 aeration Methods 0.000 claims description 33
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 28
- 229910052698 phosphorus Inorganic materials 0.000 claims description 28
- 239000011574 phosphorus Substances 0.000 claims description 28
- 238000005276 aerator Methods 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000009428 plumbing Methods 0.000 claims description 16
- 239000002351 wastewater Substances 0.000 claims description 16
- 238000010992 reflux Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000005516 engineering process Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000006396 nitration reaction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 229920000037 Polyproline Polymers 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 230000001360 synchronised effect Effects 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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Landscapes
- 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)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The present invention relates to water-treatment technology field more particularly to a kind of improved oxidation ditch biochemical wastewater treatment systems, including A oxidation ditch and B oxidation ditch, it is characterized in that: A oxidation ditch and B oxidation ditch are set side by side, and are separated by divider wall；Communication port is offered on divider wall；Right side is equipped with the first ammonia nitrogen on-line monitoring instrument in A oxidation ditch；Right side is equipped with the second ammonia nitrogen on-line monitoring instrument in B oxidation ditch, and left side is equipped with nitrate nitrogen on-line monitoring instrument；The system further includes that anaerobism selects bacterium pond, the carbon source storage tank equipped with carbon source and the PAC storage tank equipped with PAC solution, carbon source storage tank to be connected with B oxidation ditch；Anaerobism selects bacterium pond to be connected to respectively with A oxidation ditch and B oxidation ditch；B oxidation ditch is connected to secondary settling tank；PAC storage tank adds pipe by PAC and is connected to the first sewage pipe.The system is suitable for the biochemical treatment section of sewage treatment plant, has the advantages that energy-saving, effluent quality is good.
Description
Technical field
The present invention relates to water-treatment technology field more particularly to a kind of improved oxidation ditch biochemical wastewater treatment systems.
Background technique
People's living standard promotes fast speed in recent years, has higher requirement to water treatment, in addition large amount of sewage
The construction for the treatment of plant, this also makes sewage drainage standard more stringent, especially total nitrogen.The promotion of discharge standard, is further exacerbated by
The consumption of the energy in sewage disposal process, this makes sewage treatment plant's problems of energy consumption increasingly be taken seriously.
Currently, oxidation ditch and two kinds for the treatment of process of A2/O are wider in water treatment field application range, the characteristics of oxidation ditch
It is that process flow is simple, stable effluent quality, operating cost is low but dephosphorization and denitrification effect is general；The characteristics of A2/O is water outlet water
Matter is stablized, and reaches preferable synchronous denitrification dephosphorizing effect especially by appropriate improvement, but process flow is relative complex, operation
Costly, the especially removal of total nitrogen and digestive juice regurgitant volume has biggish relationship, therefore energy consumption is higher.
Therefore, if can be by the exploitation or improvements over the prior art of new technology, so that its water quality treatment is steady
It can be reduced operation energy consumption again under the premise of fixed (water outlet total nitrogen is less than 10mg/L) up to standard, this has been the technical staff in current industry
Common R&D direction.
Summary of the invention
To solve the problems mentioned above in the background art, the present invention provides a kind of improved oxidation ditch biochemical wastewater treatment
System, the system are suitable for the biochemical treatment section of sewage treatment plant, have the advantages that energy-saving, effluent quality is good.
To achieve the above object, the invention provides the following technical scheme: a kind of improved oxidation ditch biochemical wastewater treatment system
System, the A oxidation ditch and B oxidation ditch of aerator are arranged with including right side, aerator and B oxidation in the A oxidation ditch
Aerator in ditch is connected separately with the first Aeration fan and the second Aeration fan, is structurally characterized in that: the A oxidation ditch and
B oxidation ditch is set side by side, and is separated by the shared divider wall in centre；Connection institute is offered on the side wall of the divider wall left end
State the communication port of A oxidation ditch and B oxidation ditch；Right side is equipped with the first ammonia nitrogen on-line monitoring instrument in the A oxidation ditch；The B
Right side is equipped with the second ammonia nitrogen on-line monitoring instrument in oxidation ditch, and left side is equipped with nitrate nitrogen on-line monitoring instrument；The system is also wrapped
It includes anaerobism and selects bacterium pond, the carbon source storage tank equipped with carbon source and the PAC storage tank equipped with PAC solution, the carbon source storage tank is thrown by carbon source
Left side in pipe and the B oxidation ditch is added to be connected, the carbon source adds and is successively arranged first flow regulating valve and first-class on pipe
Meter, the first flow regulating valve are located between the carbon source storage tank and first flowmeter；The anaerobism selects bacterium pond side to connect
There is intake pump, the other side is connected on the right side of the A oxidation ditch and on the right side of B oxidation ditch respectively by the first plumbing for waste water and the second plumbing for waste water
It is logical；The B oxidation ditch right end is connected to by the first sewage pipe with secondary settling tank；The PAC storage tank adds pipe and described the by PAC
The connection of one sewage pipe, the PAC are added and are successively arranged second flow regulating valve and second flowmeter on pipe, the second flow tune
Section valve is located between the PAC storage tank and second flowmeter；Total phosphorus on-line monitoring instrument, institute are installed on first sewage pipe
The setting of total phosphorus on-line monitoring instrument is stated to add between pipe and the B oxidation ditch in the PAC；The first ammonia nitrogen on-line computing model
Table, the second ammonia nitrogen on-line monitoring instrument, nitrate nitrogen on-line monitoring instrument, total phosphorus on-line checking instrument, first flow regulating valve, first
Flowmeter, the first Aeration fan, the second Aeration fan and intake pump are electrically connected with PLC controller respectively.
Preferably, third flow control valve and third flowmeter, the third stream are successively arranged on first plumbing for waste water
Meter is located between the third flow control valve and the A oxidation ditch；The 4th flow is successively arranged on second plumbing for waste water
Regulating valve and the 4th flowmeter, the 4th flowmeter are located between the 4th flow control valve and the B oxidation ditch；It is described
Third flow control valve, third flowmeter, the 4th flow control valve and the 4th flowmeter are electrical with the PLC controller respectively
Connection.
Preferably, the secondary settling tank bottom is selected with the anaerobism and is connected between bacterium pond by return pipe, on the return pipe
It is successively arranged reflux pump and the 5th flow control valve；It is additionally provided on the return pipe for discharging extra sludge in the secondary settling tank
Reflux branch pipe, be provided with the 6th flow control valve on the reflux branch pipe；The reflux pump, the 5th flow control valve and institute
The 6th flow control valve is stated to be electrically connected with the PLC controller respectively.
Preferably, the B oxidation ditch right end is equipped with the first weir gate, and first sewage pipe one end and the secondary settling tank connect
Logical, the other end is passed through from the top of first weir gate and is connected to the B oxidation ditch.
Preferably, the A oxidation ditch right end is equipped with the second weir gate, connects between second weir gate and first sewage pipe
It is connected with the second sewage pipe, second sewage pipe one end passes through from the top of second weir gate and is connected to the A oxidation ditch,
The other end is connected to and is fixed on the B oxidation ditch and PAC is added on the first sewage pipe between pipe.
Preferably, the gross area ratio of the area in the A oxidation ditch equipped with aerator region and the A oxidation ditch is 2:
3；The gross area ratio of area and the B oxidation ditch in the B oxidation ditch equipped with aerator region is 1:3.
Preferably, the aerator in the A oxidation ditch and B oxidation ditch is aeration plate.
Preferably, impeller, the impeller and PLC controller electricity are equipped in the A oxidation ditch and B oxidation ditch
Property connection.
Preferably, the communication port is provided with the bottom of the divider wall；It is equipped with and the communication port in the A oxidation ditch
The hard L-type aqueduct of connection, the L-type aqueduct are vertically fixed on A oxidation ditch bottom, L-type aqueduct lower end
Opening is connected to the communication port, and the height at upper end opening is not less than the half of the divider wall height.
Preferably, the anaerobism select bacterium pond to the rate of the A oxidation ditch internal drainage be to B oxidation ditch internal drainage speed
2.3~3.1 times of rate.
The beneficial effects of the present invention are: this system mainly carries out nitrification to sewage by A oxidation ditch, aoxidized by B
Ditch mainly carries out denitrification to sewage；In A oxidation ditch after sewage treatment enter B oxidation ditch be further processed, step by step into
Row, is on the one hand easier to control inflow and the clarification time of sewage, the ammonia for being on the other hand easier to control and monitoring in sewage
Nitrogen content, nitrate nitrogen content, total phosphorus content and aerator aeration quantity, to achieve the purpose that energy-saving；Meanwhile also making
Sewage carries out nitrification and denitrification is more thorough, and sewage can be made to reach better clean-up effect.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the embodiment of the present invention.
Wherein: 1-A oxidation ditch；2-B oxidation ditch；3- divider wall；4- communication port；5- the first ammonia nitrogen on-line monitoring instrument；6-
Second ammonia nitrogen on-line monitoring instrument；7- nitrate nitrogen on-line monitoring instrument；8- anaerobism selects bacterium pond；9- carbon source storage tank；10-PAC storage tank；
11- carbon source adds pipe；12- first flow regulating valve；13- first flowmeter；14- intake pump；The first plumbing for waste water of 15-；16- second
Plumbing for waste water；The first sewage pipe of 17-；18- secondary settling tank；19-PAC adds pipe；20- second flow regulating valve；21- second flowmeter；
22- total phosphorus on-line monitoring instrument；The first Aeration fan of 23-；The second Aeration fan of 24-；25- third flow control valve；26- third
Flowmeter；The 4th flow control valve of 27-；The 4th flowmeter of 28-；29- return pipe；30- reflux pump；The 5th flow control valve of 31-；
32- reflux branch pipe；The 6th flow control valve of 33-；The first weir gate of 34-；The second weir gate of 35-；The second sewage pipe of 36-；37- aeration
Disk；38- impeller；39-L type aqueduct.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
A kind of improved oxidation ditch biochemical wastewater treatment system, as shown in Figure 1, including that right side is arranged with aerator
A oxidation ditch 1 and B oxidation ditch 2, control the aeration quantity in A oxidation ditch 1 and B oxidation ditch 2 for convenience, in the A oxidation ditch 1
Aerator in aerator and B oxidation ditch 2 is connected separately with the first Aeration fan 23 and the second Aeration fan 24, and passes through
First Aeration fan 23 and the second Aeration fan 24 are respectively that A oxidation ditch 1 and B oxidation ditch 2 provide aeration；1 He of A oxidation ditch
B oxidation ditch 2 is set side by side, and is separated by intermediate shared divider wall 3, can facilitate in two oxidation ditches sewage so simultaneously
Nitration reaction and anti-nitration reaction are carried out, and facilitates control, convenient for the division of labor, makes A oxidation ditch 1 and B oxidation ditch 2 to sewage treatment
Emphasis it is different, A oxidation ditch 1 more stresses sewage carrying out nitrification, by the mineralized nitrogen in sewage at nitrate nitrogen, degradation
The amount of COD and phosphorus in sewage, B oxidation ditch 2 more stresses sewage carrying out denitrification, so that the nitrate nitrogen in sewage is converted to
Nitrogen removal；In order to facilitate in A oxidation ditch 1 through nitrification treated sewage enters in B oxidation ditch 2 do it is further anti-
Nitrification processing offers the communication port 4 for being connected to the A oxidation ditch 1 and B oxidation ditch 2 on the side wall of 3 left end of divider wall；Institute
It states right side in A oxidation ditch 1 and first ammonia nitrogen on-line monitoring instrument 5 is installed；Right side is equipped with the second ammonia nitrogen in the B oxidation ditch 2
On-line monitoring instrument 6, left side are equipped with nitrate nitrogen on-line monitoring instrument 7；First ammonia nitrogen on-line monitoring instrument 5 is for monitoring A oxidation
Ammonia nitrogen value in ditch 1, using the reference as aeration quantity in A oxidation ditch 1, the second ammonia nitrogen on-line monitoring instrument 6 and nitrate nitrogen are supervised online
Ammonia nitrogen value and nitrate nitrogen value that instrument 7 is respectively used in monitoring B oxidation ditch 2 are surveyed, using as aeration quantity and external carbon in B oxidation ditch 2
The reference in source.The system further includes that anaerobism selects bacterium pond 8, the carbon source storage tank 9 equipped with carbon source and the PAC storage tank 10 equipped with PAC solution,
The carbon source held in the carbon source storage tank 9 is sodium acetate solution or methanol solution, and the carbon source storage tank 9 adds pipe by carbon source
11 are connected with left side in the B oxidation ditch 2, and the carbon source, which adds, is successively arranged first flow regulating valve 12 and first on pipe 11
Flowmeter 13, the first flow regulating valve 12 are located between the carbon source storage tank 9 and first flowmeter 13；By the way that carbon source is arranged
Storage tank 9 facilitates and adds carbon source into B oxidation ditch 2, prevents from causing it that oxygen is discharged when the sewage carbon-nitrogen ratio entered in oxidation ditch is too low
Nitrate nitrogen content is excessively high when changing ditch；The anaerobism selects 8 side of bacterium pond to be connected with intake pump 14, can be by raw sewage by intake pump 14
Anaerobism is pumped into select in bacterium pond 8, anaerobism select the other side in bacterium pond 8 by the first plumbing for waste water 15 and the second plumbing for waste water 16 respectively with institute
State the right side of A oxidation ditch 1 be connected on the right side of B oxidation ditch 2, be also mounted on the pump housing on the first plumbing for waste water 15 and the second plumbing for waste water 16,
Facilitate in this way and selects anaerobism the sewage in bacterium pond 8 to be pumped into A oxidation ditch 1 and B oxidation ditch 2 respectively；2 right end of B oxidation ditch
It is connected to by the first sewage pipe 17 with secondary settling tank 18, is drained into two by the first sewage pipe 17 through treated the sewage of B oxidation ditch 2
It is precipitated in heavy pond 18；The PAC storage tank 10 adds pipe 19 by PAC and is connected to first sewage pipe 17, and the PAC adds pipe
Second flow regulating valve 20 and second flowmeter 21 are successively arranged on 19, the second flow regulating valve 20 is located at the PAC storage
Between tank 10 and second flowmeter 21；Total phosphorus on-line monitoring instrument 22 is installed, the total phosphorus exists on first sewage pipe 17
The setting of line measuring instrument 22 adds between pipe 19 and the B oxidation ditch 2 in the PAC；Total phosphorus on-line monitoring instrument 22 is for supervising
The total phosphorus content in the sewage that handles through oxidation ditch is surveyed, using as the reference for adding PAC solution amount into sewage；Pass through setting
PAC storage tank 10 facilitates and adds PAC solution into the sewage handled through oxidation ditch, for further removing the phosphorus in decontaminated water, and increases
It is entered after the settling property of strong sludge, oxidation ditch water outlet and PAC solution mixing and carries out mud-water separation in secondary settling tank 18.Described
One ammonia nitrogen on-line monitoring instrument 5, the second ammonia nitrogen on-line monitoring instrument 6, nitrate nitrogen on-line monitoring instrument 7, total phosphorus on-line checking instrument
22, first flow regulating valve 12, first flowmeter 13, the first Aeration fan 23, the second Aeration fan 24 and intake pump 14 are divided equally
It is not electrically connected with PLC controller.First Aeration fan 23 and the second Aeration fan 24 are frequency conversion fan, and intake pump 14 is to become
Frequency water pump.
The system is set side by side with B oxidation ditch 2 by A oxidation ditch 1 and is connected to by communication port 4, and multipoint water feeding is utilized
Principle makes full use of the carbon source in sewage to participate in anti-nitration reaction, reduces the aeration quantity of aerobic tank.Raw sewage selects bacterium pond through anaerobism
8 major parts, which enter in A oxidation ditch, degrades, due to being provided simultaneously with aerobic and anoxic environment, and aerobic zone face in oxidation ditch
Product is larger, thus sewage enters in A oxidation ditch 1 and can not only convert in fully degraded COD under aerobic environment, by ammonia nitrogen in sewage
For nitrate nitrogen and a small amount of phosphorus is absorbed, while a small amount of nitrate nitrogen can also be converted to nitrogen discharge, the part under anaerobic environment
Sewage enters B oxidation ditch 2 in A oxidation ditch after abundant nitrification, has in B oxidation ditch 2 and constantly selects bacterium pond 8 to be discharged into from anaerobism
Fresh sewage, and aerator occupied area is less in B oxidation ditch 2, is aerated weaker, thus the nitrate nitrogen in B oxidation ditch 2 can be with
It is effectively removed, simultaneously because there is aeration performance, a small amount of remaining COD and ammonia nitrogen can be also effectively removed, and most
It is drained into secondary settling tank 18 by first sewage pipe 17 on 2 right side of B oxidation ditch eventually.
This system mainly carries out nitrification to sewage by A oxidation ditch 1, is mainly carried out to sewage by B oxidation ditch 2 anti-
Nitrification；Enter B oxidation ditch 2 in A oxidation ditch 1 after sewage treatment to be further processed, substep carries out, and is on the one hand easier to control
On the other hand the inflow of sewage processed and clarification time are easier to control and monitor ammonia-nitrogen content in sewage, nitrate nitrogen content, total
The aeration quantity of phosphorus content and aerator, to achieve the purpose that energy-saving；Meanwhile also make sewage carry out nitrification and
Denitrification is more thorough, and sewage can be made to reach better clean-up effect.
In the present embodiment, bacterium pond 8 is selected to respectively enter A oxidation ditch 1 and B oxidation ditch 2 in order to accurately control from anaerobism
Interior sewage quantity facilitates the two oxidation ditch inflow ratios that adjust, is successively arranged third flow tune on first plumbing for waste water 15
Save valve 25 and third flowmeter 26, the third flowmeter 26 be located at the third flow control valve 25 and the A oxidation ditch 1 it
Between；The 4th flow control valve 27 and the 4th flowmeter 28, the 4th flowmeter 28 are successively arranged on second plumbing for waste water 16
It is located between the 4th flow control valve 27 and the B oxidation ditch 2；The third flow control valve 25, third flowmeter 26,
4th flow control valve 27 and the 4th flowmeter 28 are electrically connected with the PLC controller respectively, and pass through PLC controller control
The opening size of third flow control valve 25 and the 4th flow control valve 27 processed.
In the present embodiment, 18 bottom of secondary settling tank is selected with the anaerobism and is connected between bacterium pond 8 by return pipe 29, institute
It states and is successively arranged reflux pump 30 and the 5th flow control valve 31 on return pipe 29；It is additionally provided on the return pipe 29 for discharging
The reflux branch pipe 32 of extra sludge in secondary settling tank 18 is stated, is provided with the 6th flow control valve 33 on the reflux branch pipe 32；Institute
Reflux pump 30, the 5th flow control valve 31 and the 6th flow control valve 33 is stated electrically to connect with the PLC controller respectively
It connects.It is selected in bacterium pond 8 in this way, the returned sludge in raw sewage and secondary settling tank 18 is able to enter anaerobism, it is poly- in sludge
Phosphorus bacterium releases intracorporal phosphorus under the anaerobic environment that anaerobism selects bacterium pond 8, thus convenient in A oxidation ditch 1 and B oxidation ditch 2
The region equipped with aerator in preferably absorb phosphorus in sewage.
In the present embodiment, 2 right end of B oxidation ditch is equipped with the first weir gate 34, described first sewage pipe, 17 one end and institute
The connection of secondary settling tank 18 is stated, the other end is passed through from the top of first weir gate 34 and is connected to the B oxidation ditch 2.The A oxidation ditch
1 right end is equipped with the second weir gate 35, and the second sewage pipe 36, institute are communicated between second weir gate 35 and first sewage pipe 17
It states 36 one end of the second sewage pipe to pass through from the top of second weir gate 35 and be connected to the A oxidation ditch 1, the other end is connected to simultaneously
It is fixed on the B oxidation ditch 2 and PAC is added on the first sewage pipe 17 between pipe 19.By adjusting the first weir gate 34 and second
The height of weir gate 35 can facilitate the highest liquid level that sewage can reach in control A oxidation ditch 1 and B oxidation ditch 2；Second blowdown
The setting of pipe 36, so that A oxidation ditch 1 can also be connected to secondary settling tank 18, so that A oxidation ditch 1 when necessary can also be single
Solely use.
In the present embodiment, the area with the A oxidation ditch 1 in the interior region equipped with aerator of the A oxidation ditch 1 is total
Area ratio is 2:3；The area in region in the B oxidation+ditch 2 equipped with aerator is with the gross area ratio of the B oxidation ditch 2
1:3.In this way, since the aerobic region occupied area in A oxidation ditch 1 is larger, so can be abundant by the ammonia nitrogen in sewage
It is converted to nitrate nitrogen, degradation COD, absorbs phosphorus, while part nitrate nitrogen can also be converted into nitrogen under anaerobic environment, from sewage
Middle discharge；And the region as shared by aerator is less in B oxidation ditch 2, aeration quantity is less compared with A oxidation ditch 1, so that B oxygen
The removal effect for changing nitrate nitrogen in ditch 2 more preferably, then cooperates the additional carbon put into from carbon source storage tank 9, can be to B oxidation ditch 2
In nitrate nitrogen removal more thoroughly, simultaneously as there is weaker aeration performance, remaining a small amount of ammonia in sewage can be removed
Nitrogen and COD, treated, and sewage is finally discharged in secondary settling tank 18 from the first sewage pipe 17 being connected on the right side of B oxidation ditch 2 precipitates.
In the present embodiment, the aerator in the A oxidation ditch 1 and B oxidation ditch 2 is aeration plate 37.It can be with oxygen
The sewage changed in ditch has sufficient contact area, is aerated more uniform.
In the present embodiment, the flow velocity of A oxidation ditch 1 and the sewage in B oxidation ditch 2, the A oxidation ditch are controlled for convenience
Impeller 38 is equipped in 1 and B oxidation ditch 2, the impeller 38 is electrically connected with the PLC controller.Pass through PLC controller
The revolving speed of impeller 38 is controlled, to achieve the purpose that change effluent flow rate in oxidation ditch.
In the present embodiment, the communication port 4 is provided with the bottom of the divider wall 3；Be equipped in the A oxidation ditch 1 with
The hard L-type aqueduct 39 that the communication port 4 is connected to, the L-type aqueduct 39 are vertically fixed on 1 bottom of A oxidation ditch, institute
It states 39 lower ending opening of L-type aqueduct to be connected to the communication port 4, the height at upper end opening is not less than 3 height of divider wall
Half.In this way, the sewage in A oxidation ditch 1 can be made to possess the longer nitrification time, can also prevent in B oxidation ditch 2
Part of contaminated water flow back into A oxidation ditch 1.
In the present embodiment, the anaerobism select bacterium pond 8 to the rate of 1 internal drainage of A oxidation ditch be to the B oxidation ditch
2.5 times of 2 internal drainage rates.In this way, sewage in A oxidation ditch 1 and B oxidation ditch 2 can be made to carry out nitration reaction and anti-
All more thoroughly, purifying water effect is more preferably for nitration reaction.
Working method and principle: when work, raw sewage is pumped into anaerobism by intake pump 14 and is selected in bacterium pond 8, is then existed
It is drained into A oxidation ditch 1 and B oxidation ditch 2 respectively, third flow control valve 25 and is adjusted by control PLC controller respectively
The opening size of four flow control valves 27, so that anaerobism is selected bacterium pond 8 to the rate of 1 internal drainage of A oxidation ditch is arranged into B oxidation ditch 2
2.5 times of water speed rate.It, can be to most of organic in sewage into the sewage in A oxidation ditch 1 in ditch under the action of microorganism
Object is degraded, and is adjusted to aerator in A oxidation ditch 1 by PLC controller and is provided the Aeration fan of aeration, makes A oxidation ditch 1
Interior sewage carries out sufficient nitration reaction under aerobic condition, converts nitrate nitrogen for most ammonia-nitrogen in sewage, passes through the first ammonia
Nitrogen on-line monitoring instrument 5 monitors, and controls the ammonia nitrogen value in A oxidation ditch 1 about between 5~10mg/L；In A oxidation ditch 1
Sewage enters B from 39 upper end opening of L-type aqueduct after processing and water level reach the height of 39 upper end opening of L-type aqueduct
Oxidation ditch 2.Denitrification is carried out using the carbon source in sewage in B oxidation ditch 2 and the carbon source added from carbon source storage tank 9, is gone
Except the nitrate nitrogen in B oxidation ditch 2, the opening size and and first flow of first flow regulating valve 12 are adjusted by PLC controller
Meter 13 matches, can control carbon source dosage number；It is monitored, is made in B oxidation ditch 2 by nitrate nitrogen on-line monitoring instrument 7
Nitrate nitrogen value controls between 3~7mg/L；Simultaneously as it is also equipped with aerator in B oxidation ditch 2, it can be to original in B oxidation ditch 2
Sewage and the sewage being discharged into from A oxidation ditch 1 are aerated, and are further removed ammonia nitrogen, phosphorus and rest COD in sewage, are passed through
The monitoring of second ammonia nitrogen on-line monitoring instrument 6 controls the ammonia nitrogen value in B oxidation ditch 2 between 1.5~3mg/L.Adjust A oxidation
The height of the first weir gate 34 on ditch 1 and the second weir gate 35 on B oxidation ditch 2, can be used for controlling the peak level in oxidation ditch.
Sewage after B oxidation ditch 2 is further processed is entered by the first sewage pipe 17 carries out mud-water separation in secondary settling tank 18；In order to
The total phosphorus content in sewage is reduced, the PAC solution in PAC storage tank 10 is added in the first sewage pipe 17 so as to the dirt with process
Water mixes, to remove the phosphorus in sewage, while but also the settling property of sludge is more preferable, passes through PLC controller and adjusts second
The opening size of flow control valve 20 is simultaneously matched with second flowmeter 21, can control PAC solution dosage number, logical
The monitoring for crossing total phosphorus on-line monitoring instrument 22 makes to enter the total phosphorus content in the water of secondary settling tank 18 and controls in 0.2mg/L or less.
Sewage enters in subsequent treatment process after 18 mud-water separation of secondary settling tank, and sludge is divided into two trends, a part warp
Return pipe 29 flows back into anaerobism and selects in bacterium pond 8, and the polyP bacteria in sludge will be intracorporal under the anaerobic environment that anaerobism is selected in bacterium pond 8
Phosphorus releases, to absorb the phosphorus in sewage after entering oxidation ditch；This processing system is discharged in another part.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. a kind of improved oxidation ditch biochemical wastewater treatment system, including right side be arranged with aerator A oxidation ditch (1) and
B oxidation ditch (2), the aerator in aerator and B oxidation ditch (2) in the A oxidation ditch (1) are connected separately with the first exposure
Gas blower (23) and the second Aeration fan (24), it is characterised in that: the A oxidation ditch (1) and B oxidation ditch (2) are set side by side, and
It is separated by the shared divider wall (3) in centre；The connection A oxidation ditch (1) is offered on the side wall of divider wall (3) left end
With the communication port (4) of B oxidation ditch (2)；Right side is equipped with the first ammonia nitrogen on-line monitoring instrument (5) in the A oxidation ditch (1)；Institute
It states right side in B oxidation ditch (2) and the second ammonia nitrogen on-line monitoring instrument (6) is installed, left side is equipped with nitrate nitrogen on-line monitoring instrument
(7)；The system further includes that anaerobism selects bacterium pond (8), the carbon source storage tank (9) equipped with carbon source and the PAC storage tank equipped with PAC solution
(10), the carbon source storage tank (9) adds pipe (11) by carbon source and is connected with left side in the B oxidation ditch (2), and the carbon source is thrown
Add and be successively arranged first flow regulating valve (12) and first flowmeter (13) on pipe (11), the first flow regulating valve (12) sets
Between the carbon source storage tank (9) and first flowmeter (13)；The anaerobism selects bacterium pond (8) side to be connected with intake pump (14), separately
Side is right with A oxidation ditch (1) right side and B oxidation ditch (2) respectively by the first plumbing for waste water (15) and the second plumbing for waste water (16)
Side connection；B oxidation ditch (2) right end is connected to by the first sewage pipe (17) with secondary settling tank (18)；The PAC storage tank (10) is logical
It crosses PAC and adds pipe (19) and be connected to first sewage pipe (17), the PAC is added and is successively arranged second flow tune on pipe (19)
Section valve (20) and second flowmeter (21), the second flow regulating valve (20) are located at the PAC storage tank (10) and second flow
It counts between (21)；It is equipped with total phosphorus on-line monitoring instrument (22) on first sewage pipe (17), the total phosphorus on-line computing model
Table (22) setting adds between pipe (19) and the B oxidation ditch (2) in the PAC；The first ammonia nitrogen on-line monitoring instrument
(5), the second ammonia nitrogen on-line monitoring instrument (6), nitrate nitrogen on-line monitoring instrument (7), total phosphorus on-line checking instrument (22), first flow
Regulating valve (12), first flowmeter (13), the first Aeration fan (23), the second Aeration fan (24) and intake pump (14) are distinguished
It is electrically connected with PLC controller.
2. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: described first
Third flow control valve (25) and third flowmeter (26) are successively arranged on plumbing for waste water (15), the third flowmeter (26) is located at
Between the third flow control valve (25) and the A oxidation ditch (1)；The 4th stream is successively arranged on second plumbing for waste water (16)
Adjustable valve (27) and the 4th flowmeter (28), the 4th flowmeter (28) are located at the 4th flow control valve (27) and institute
It states between B oxidation ditch (2)；The third flow control valve (25), third flowmeter (26), the 4th flow control valve (27) and
Four flowmeters (28) are electrically connected with the PLC controller respectively.
3. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: described two is heavy
Pond (18) bottom is selected with the anaerobism and is connected between bacterium pond (8) by return pipe (29), is successively arranged on the return pipe (29)
Reflux pump (30) and the 5th flow control valve (31)；It is additionally provided on the return pipe (29) for discharging in the secondary settling tank (18)
The reflux branch pipe (32) of extra sludge is provided with the 6th flow control valve (33) on the reflux branch pipe (32)；The reflux
Pump (30), the 5th flow control valve (31) and the 6th flow control valve (33) electrically connect with the PLC controller respectively
It connects.
4. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: the B oxygen
Change ditch (2) right end and be equipped with the first weir gate (34), described first sewage pipe (17) one end is connected to the secondary settling tank (18), the other end
It passes through from the top of first weir gate (34) and is connected to the B oxidation ditch (2).
5. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1 or 4, it is characterised in that: the A
Oxidation ditch (1) right end is equipped with the second weir gate (35), is communicated between second weir gate (35) and first sewage pipe (17)
Second sewage pipe (36), described second sewage pipe (36) one end passed through from the top of second weir gate (35) and with the A oxygen
Change ditch (1) connection, the other end is connected to and is fixed on the B oxidation ditch (2) and PAC adds the first sewage pipe between pipe (19)
(17) on.
6. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: the A oxygen
The gross area ratio for changing area and the A oxidation ditch (1) in ditch (1) equipped with aerator region is 2:3；The B oxidation ditch (2)
The interior area equipped with aerator region and the gross area ratio of the B oxidation ditch (2) are 1:3.
7. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: the A oxygen
The aerator changed in ditch (1) and B oxidation ditch (2) is aeration plate (37).
8. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: the A oxygen
Change and be equipped with impeller (38) in ditch (1) and B oxidation ditch (2), the impeller (38) and the PLC controller are electrically connected.
9. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: the connection
Mouth (4) is provided with the bottom of the divider wall (3)；The hard L being connected to the communication port (4) is equipped in the A oxidation ditch (1)
Type aqueduct (39), the L-type aqueduct (39) are vertically fixed on A oxidation ditch (1) bottom, the L-type aqueduct (39)
Lower ending opening is connected to the communication port (4), and the height at upper end opening is not less than the half of the divider wall (3) height.
10. a kind of improved oxidation ditch biochemical wastewater treatment system according to claim 1, it is characterised in that: described to detest
It is to the 2.3~3.1 of B oxidation ditch (2) the internal drainage rate that oxygen, which selects the rate of bacterium pond (8) Xiang Suoshu A oxidation ditch (1) internal drainage,
Times.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111410314A (en) * | 2020-04-30 | 2020-07-14 | 中原环保股份有限公司 | Pre-control method and device for denitrification and dephosphorization by improved oxidation ditch process |
| CN111547934A (en) * | 2020-04-10 | 2020-08-18 | 安徽国祯环保节能科技股份有限公司 | SBR sewage treatment system and treatment method thereof |
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