CN108059244A - A kind of energy-efficient coupling oxidation ditch denitrification process - Google Patents
A kind of energy-efficient coupling oxidation ditch denitrification process Download PDFInfo
- Publication number
- CN108059244A CN108059244A CN201711432870.6A CN201711432870A CN108059244A CN 108059244 A CN108059244 A CN 108059244A CN 201711432870 A CN201711432870 A CN 201711432870A CN 108059244 A CN108059244 A CN 108059244A
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- oxidation ditch
- denitrification
- valve
- energy
- water inlet
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Activated Sludge Processes (AREA)
Abstract
This application involves a kind of energy-efficient coupling oxidation ditch denitrification process, belong to the biologic treating technique field of water, waste water or sewage.Including oxidation ditch, at least one valve, described is distributed in oxidation ditch, aeration head controlled by valve, with the opening and closing of control；The water inlet pipe of oxidation ditch is sewage inlet, which is additionally provided with reflux sludge tube, grug feeding jar is set on reflux sludge tube；Selection area is formed at water inlet pipe.The application is applied to sewage such as treatment of dyeing wastewater, has many advantages, such as that energy-efficient, regulation and control are flexible.
Description
Technical field
This application involves a kind of energy-efficient coupling oxidation ditch denitrification process, belong to the biology of water, waste water or sewage
Processing technology field.
Background technology
Traditional printing-dyeing waste water treatment process, it is main to use " pretreatment+biochemical treatment+dosing coagulation " technique.COD of sewage
There is apparent removal in each section, ammonia nitrogen index is degraded mainly by aerobic bacteria and removed, but total nitrogen removal effect is not obvious.It is real
In the operation of border, since water inlet total nitrogen is high, along with process is not aerated in whole flow process, lack effective denilrification system,
Water outlet ammonia nitrogen is relatively low, but total nitrogen index is difficult to reach Chinese effluent standard, and nitrogen removal rate is generally in 40-50%；Patent
Although flowing back in 2015103142206 to different phase, different types of sludge, and pass through and be repeatedly homogenized to sewage itself
Property realize it is pre- improve, but since the non-aeration area single overcurrent reaction time is very short, in oxidation ditch nitration reaction it is sufficient rather than
The anti-nitration reaction of aeration zone is insufficient, and effect is unsatisfactory.
Based on this, the application is made.
The content of the invention
For the drawbacks described above present in existing treatment of dyeing wastewater, the application provides a kind of need not pre-process and can be realized
The energy-efficient oxidation ditch nitrogen rejection facility of energy-efficient denitrogenation, the device synchronously realize on conventional oxidation ditch Process ba- sis
Nitration denitrification biological denitrificaion and Denitrifying Phosphorus Removal Technology, and distribution denitrogenation is realized during nitration denitrification, optimize nitre
Change denitrification process, form New oxidation ditch technology.
To achieve the above object, the technical solution that the application takes is as follows：
A kind of energy-efficient coupling oxidation ditch denitrification process, including oxidation ditch, at least one valve, the oxidation
Lang Qu is distributed in ditch, at least one aeration Head Section is set in each gallery, the aeration head for being aerated Head Section is controlled by valve, with control
It is aerated the opening and closing of Head Section；The water inlet pipe of oxidation ditch is sewage inlet, which is additionally provided with reflux sludge tube, reflux sludge tube
Upper setting grug feeding jar；Selection area is formed at water inlet pipe；Valve is closed, and sewage carries out anerobic-aerobic-anerobic-good in oxidation ditch
Oxygen alternate cycles；Valve opening, corresponding aeration Head Section carry out nitration reaction, and denitrification occurs being aerated beyond Head Section, anti-nitre
The denitrification phegma for changing area is mixed with the water inlet of water inlet pipe, and denitrification activity is carried out in area is selected, and forms synchronous nitration
Denitrification process；In entire oxidation ditch, the ratio of anaerobic zone and aerobic zone is 1：5-11:25, it is carried out by the opening and closing of valve specific
The regulation and control of ratio.
Further, as preferred：
Blender is set in oxidation ditch beyond the aeration Head Section, sludge settling is prevented not being aerated section.
The oxidation ditch is annular oxidation ditch, and area is selected to be located at the ring Hu Chu at water inlet pipe.Minimum ring Hu Chu is selection
Area, water inlet is mixed with denitrification phegma carries out denitrification activity, is conventional AO technology patterns.
The valve is located in oxidation ditch, and each valve corresponds to 1-2 aeration Head Section of control.
The advantageous effect concrete analysis of said program is as follows：
(1) AO techniques and synchronous nitration and denitrification technology are coupled, enhance denitrification functions.According to sewage quality not
Together, be combined into oxidation ditch anaerobic phosphorus release area-denitrifying phosphorus uptake area-anaerobism (anaerobism) area-aerobic zone of different proportion-
Anaerobic zone-aerobic zone.Carbon is removed by the assimilation and dissimilation of aerobic microbiological, and nitrogen is made by the nitrification of aerobic nitrification bacterium
With and the denitrification of oxygen denitrifying bacterium remove.The application will select the conventional AO techniques nitre synchronous with remaining region in area
Change denitrification process to be coupled, further improve the denitrification effect of technique.
(2) operation control optimization can carry out anaerobic zone aerobic zone in oxidation ditch according to influent quality, water outlet requirement different
Switching and adjustment, flexible operation controllability are strong.Valve is for controlling aeration degree, and when the valve is closed, sludge is in endless track
The upper state for carrying out anerobic-aerobic-anerobic-aerobic alternate cycles is conducive to control dissolved oxygen, forms synchronous nitration and denitrification mistake
Journey, using scale as 200,000 m3Exemplified by the oxidation ditch of/d, if four, single seat oxidation ditch present situation size 185.2m × 46.6m, effective water
Deep 10m.Bioselection pond is equipped with before every oxidation ditch, selects area planar dimension 22.4m × 35.0m, residence time 3.6h.Sludge
Load：
0.12kgBOD/kgMLSS.d, MLSS:3.0g/L, oxidation ditch total residence time 36.24h.And anaerobic zone volume
24362m3(wherein select area 7840m3), residence time 11h；Aerobic zone residence time 25.24h, anaerobic zone calculate：Kde=
0.04(kgNO3-N)/(kgMLSS.d)。
If influent COD is higher, can appropriate Open valve, anaerobic zone and aerobic zone proportion are 1:5 to 11:It can between 25
To adjust, running and comparing is flexible；It decreases simultaneously and electricity is used to regular oxidation ditch, energy-saving effect is apparent.
(3) and on returned sludge pipeline increase sodium acetate dosing system, extend muddy water and medicament reaction time, strengthen
Reaction effect.Medicament addition device is adjusted on returned sludge pipeline, has not only ensured to be sufficiently mixed with sludge, but also has extended medicament
Reaction time so that medicament utilization rate improves.
Description of the drawings
Fig. 1 is the structure diagram of the application.
Figure label：1. propeller；2. valve；21. valve one；22. valve two；23. valve three；24. valve four；25.
Valve five；26. valve six；27. valve seven；3. Lang Qu；31. the first gallery；32. the second gallery；33. the 3rd gallery；34. the 4th
Gallery；4. reflux sludge tube；5. grug feeding jar；6. water outlet；7. select area；8. water inlet pipe.
In figure, dash area is aeration zone (aerobic zone), and non-shaded portion is non-aeration area (anaerobic zone).
Specific embodiment
Embodiment 1
A kind of energy-efficient coupling oxidation ditch denitrification process of the present embodiment, with reference to Fig. 1, including oxidation ditch, at least one
A valve 2 sets multiple corridor areas 3 in the oxidation ditch, such as the first corridor area 31, the second corridor area 32, the 3rd corridor area 33 and in Fig. 1
Four corridors area 34 set at least one aeration Head Section in each gallery, and the aeration head for being aerated Head Section is controlled by valve 2, are exposed with controlling
The opening and closing of gas Head Section；The water inlet pipe 8 of oxidation ditch is sewage inlet, which is additionally provided with reflux sludge tube 4, reflux sludge tube
Grug feeding jar 5 is set on 4；Selection area 7 is formed at water inlet pipe 8；Shadow region is aerobic zone in Fig. 1, and nonshaded area is anaerobic zone, valve
2 close, and sewage carries out anerobic-aerobic-anerobic-aerobic alternate cycles in oxidation ditch；Valve 2 is opened, the exposure in corresponding corridor area 3
Gas Head Section carries out nitration reaction, and denitrification occurs be aerated beyond Head Section, the denitrification phegma of denitrification zone and water inlet pipe 8
Water inlet mixing, and denitrification activity is carried out in area 7 is selected, form synchronous nitration and denitrification process；In entire oxidation ditch, anaerobism
The ratio of area's (i.e. nonshaded area in Fig. 1) and aerobic zone (i.e. shadow region in Fig. 1) is 1：5-11:25, by the opening and closing of valve 2
Carry out the regulation and control of specific ratio.
AO techniques and synchronous nitration and denitrification technology are coupled, enhance denitrification functions.According to the difference of sewage quality,
Anaerobic phosphorus release area-denitrifying phosphorus uptake area-anaerobism (anaerobism) area-aerobic zone-that different proportion is combined into oxidation ditch is detested
Oxygen area-aerobic zone.Carbon is removed by the assimilation and dissimilation of aerobic microbiological, nitrogen by the nitrification of aerobic nitrification bacterium,
And the denitrification removal of oxygen denitrifying bacterium.The application will select the synchronous nitration in conventional AO techniques and remaining region in area 7
Denitrification process is coupled, and further improves the denitrification effect of technique.
To realize more using effects, said program can also be added as follows：
In oxidation ditch outside aeration Head Section blender is set (conventional whisk to can be used, concrete structure is not shown in Fig. 1
Show), prevent sludge settling not being aerated section.
To realize more using effects, said program can also be added as follows：
Oxidation ditch is annular oxidation ditch, area 7 is selected to be located at the ring Hu Chu at water inlet pipe 8, each circuit/corridor is distributed in area
At least one aeration Head Section, each opening and closing for being aerated Head Section and its interior aeration head being controlled by identical or different valve.Shade in Fig. 1
Part is aeration zone, and minimum ring Hu Chu is selection area 7, and water inlet is mixed with denitrification phegma carries out denitrification activity, is conventional
AO technology patterns.
Oxidation ditch is ring aeration tank, 200,000 m of scale3/ d, if four, single seat oxidation ditch present situation size 185.2m ×
46.6m, available depth 10m.Bioselection pond is equipped with before every oxidation ditch, selects area planar dimension 22.4m × 35.0m, is stopped
Time 3.6h.Sludge loading：0.12kgBOD/kgMLSS.d, MLSS:3.0g/L, oxidation ditch total residence time 36.24h.
22 low energy consumption blenders are shared, sludge settling is prevented not being aerated section.
Aeration control valve, by original aerated space Close All, volume 24362m in anoxic zone after transformation3It (wherein selects
Area 7840m3), residence time 11h.Aerobic zone residence time 25.24h.Anoxic zone calculates：Kde=0.04 (kgNO3-N)/
(kgMLSS.d).Valve causes sludge to carry out the shape of anerobic-aerobic-anerobic-aerobic alternate cycles on endless track when closing
State is conducive to control dissolved oxygen, forms synchronous nitration and denitrification process.
When AO techniques and synchronous nitration and denitrification process are coupled, denitrification functions are enhanced, further improve technique
Denitrification effect.
Alternative opens the valve in Fig. 1.If influent COD is higher, the valve in Fig. 1 can be suitably opened.Anaerobic zone with
Aerobic zone proportion is 1:5 to 11:It can be adjusted between 25, and can be according to influent quality, water outlet requirement to detesting in oxidation ditch
Oxygen area aerobic zone carries out different switchings and adjustment, and flexible operation, controllability is strong, meanwhile, it reduces and electricity is used to regular oxidation ditch
Amount, energy-saving effect are apparent.
On reflux sludge tube 4 grug feeding jar 5 is set to carry out adding for medicament such as sodium acetate, increased on returned sludge pipeline
Sodium acetate dosing system both ensures to be sufficiently mixed with sludge, extends muddy water and medicament reaction time so that medicament utilization rate carries
Height strengthens reaction effect.
Treatment effect is analyzed
(1) wastewater treatment efficiency is analyzed
Said program wastewater treatment efficiency is tested, is as a result summarized as follows：
The denitrification effect table of comparisons under 1 different operating environment of table
As it can be seen from table 1 under the conditions of medicine is not added with, the oxidation ditch nitrogen rejection facility of the application is compared with conventional apparatus device denitrogenation
It is significantly improved.
(2) energy consumption analysis
The air quantity of 2 different schemes of table and DO delta data tables
| It is conventional | The application | |
| Air quantity (m3/h) | 70000 | 45000 |
| Water (ten thousand tons) | 20 | 20 |
| Steam-water ratio | 8.4 | 5.4 |
| First gallery dissolved oxygen | 1.5 | 0.56 |
| 4th gallery dissolved oxygen | 5.1 | 4.1 |
The power consumption table of comparisons under 3 different schemes of table
| It is conventional | The application | |
| The electricity charge (yuan/ton water) | 0.39 | 0.25 |
(3) social benefit is analyzed
According to 200,000 ton per day of inflow, run time (15 days is during the New Year) on the 350th in year, former water outlet TN is 30mg/L,
Reveal water total nitrogen to calculate for 15mg/L, it is 1.05 tons to reduce TN discharge capacitys year.The discharge capacity of the TN of sewage discharge is greatly reduced,
There is great environment protection significance to the reduction of eutrophication in water body.Simultaneously because systematic air flow is greatly lowered, amount of electricity saving is apparent, year
Save 13,000,000 degree of electricity, 9,800,000 yuan of power cost saving.
There is provided technical solution is made the above content is the preferred embodiment for combining the invention further detailed
It describes in detail bright, it is impossible to assert that the invention specific implementation is confined to these above-mentioned explanations, for the affiliated technology of the invention
For the those of ordinary skill in field, without departing from the concept of the premise of the invention, several simple deductions can also be made
Or replace, it should all be considered as belonging to the protection domain of the invention.
Claims (5)
1. a kind of energy-efficient coupling oxidation ditch denitrification process, it is characterised in that：Including oxidation ditch, at least one valve,
Several gallerys are distributed in the oxidation ditch, an aeration Head Section, the exposure being aerated in Head Section are at least set in each gallery
Gas head is controlled by valve, with the opening and closing of control；The water inlet pipe of oxidation ditch is sewage inlet, which is additionally provided with returned sludge
It manages, grug feeding jar is set on reflux sludge tube；Selection area is formed at water inlet pipe；Valve close, sewage carried out in oxidation ditch anaerobism-
Aerobic-anoxia-aerobic alternate cycles；Valve opening, corresponding carry out nitration reaction, denitrification zone are occurring in addition, denitrification
The denitrification phegma in area is mixed with the water inlet of water inlet pipe, and denitrification activity is carried out in area is selected, and forms simultaneous nitrification and denitrification
Nitrifying process.
2. a kind of energy-efficient coupling oxidation ditch denitrification process as described in claim 1, it is characterised in that：Beyond described
Oxidation ditch in blender is set.
3. a kind of energy-efficient coupling oxidation ditch denitrification process as described in claim 1, it is characterised in that：The oxygen
It is annular oxidation ditch to change ditch, and area is selected to be located at the ring Hu Chu at water inlet pipe.
4. a kind of energy-efficient coupling oxidation ditch denitrification process as claimed in claim 3, it is characterised in that：The annular
It is distributed at least one in each circuit of oxidation ditch, the opening and closing of its interior aeration head is each controlled by identical or different valve.
5. such as a kind of energy-efficient coupling oxidation ditch denitrification process of claim 1-4 any one of them, it is characterised in that：
In the oxidation ditch, the ratio of anaerobic zone and aerobic zone is 1：5-11:25, the regulation and control of specific ratio are carried out by the opening and closing of valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711432870.6A CN108059244A (en) | 2017-12-26 | 2017-12-26 | A kind of energy-efficient coupling oxidation ditch denitrification process |
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| CN201711432870.6A CN108059244A (en) | 2017-12-26 | 2017-12-26 | A kind of energy-efficient coupling oxidation ditch denitrification process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399805A (en) * | 2018-10-29 | 2019-03-01 | 安徽京望环保科技有限公司 | A kind of circulating biological filter tank sewage treatment process and device |
| CN109987702A (en) * | 2019-03-18 | 2019-07-09 | 沈阳建筑大学 | A kind of process of synchronous denitrification dephosphorizing oxidation ditch and its strengthened denitrification |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109399805A (en) * | 2018-10-29 | 2019-03-01 | 安徽京望环保科技有限公司 | A kind of circulating biological filter tank sewage treatment process and device |
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| CN109987702A (en) * | 2019-03-18 | 2019-07-09 | 沈阳建筑大学 | A kind of process of synchronous denitrification dephosphorizing oxidation ditch and its strengthened denitrification |
| CN109987702B (en) * | 2019-03-18 | 2022-01-11 | 沈阳建筑大学 | Synchronous nitrogen and phosphorus removal oxidation ditch and enhanced nitrogen removal process method thereof |
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Application publication date: 20180522 |