CN105016563A - Sewage treatment system with A2/O biological treatment system - Google Patents
Sewage treatment system with A2/O biological treatment system Download PDFInfo
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- CN105016563A CN105016563A CN201410166893.7A CN201410166893A CN105016563A CN 105016563 A CN105016563 A CN 105016563A CN 201410166893 A CN201410166893 A CN 201410166893A CN 105016563 A CN105016563 A CN 105016563A
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Abstract
The invention provides a sewage treatment system with an A2/O biological treatment system. A secondary sedimentation tank is used for performing secondary sedimentation treatment on the inflow of sewage, a sewage pipeline after treatment is connected into a disinfection contact tank, then the sewage is introduced into the A2/O biological treatment system after reaction treatment in the disinfection contact tank, namely the sewage is introduced into an anaerobic tank, an anoxic tank and an aerobic tank for advanced treatment, the sewage pipeline after treatment is connected into a third-time sedimentation tank to perform third-time sedimentation treatment, the effluent after treatment is recycled, and the excess sludge is cleaned and discharged. The sewage treatment system provided by the invention makes use of the anaerobic tank, the anoxic tank and the aerobic tank to perform advanced treatment on the sewage, thereby effectively removing harmful substances of phosphorus, nitrogen and the like in urban domestic sewage; and meanwhile, sedimentation is performed for three times to ensure that the sludge and water are completely separated and recycled, so that resources are fully used, and energy conservation and environmental protection are realized.
Description
Technical field
The invention belongs to sewage treatment area, be specifically related to a kind of with A
2the Sewage treatment systems of/O biological treatment system.
Background technology
City domestic sewage refers to the draining in people's daily life, and discharge via living facilities such as residential district, public place, kitchen, bathrooms, wherein organic pollutant accounts for about 60%, as protein, fat, carbohydrate etc.; Inorganic pollutant accounts for about 40%, mainly silt and foreign material etc., also has washing composition and pathogenic micro-organism and parasitic ovum etc. in addition.Therefore municipal effluent has to pass through process and reaches relevant emission standards and could discharge water body, avoids causing water pollution.Reusing sewage is the most rational outlet of municipal effluent, therefore, during city domestic sewage treatment plant process water recycling, should perform corresponding water quality standard according to application target and determine corresponding wastewater deep treatment process.
After city domestic sewage purifying treatment, can water body be discharged, become the supplementary feed of water body, also can again be used, and reuse is the most rational outlet, both can saves and utilize the Freshwater resources of limited preciousness, the quantity discharged of sewage can be reduced again, alleviate water pollutions.The wide range of municipal effluent reuse after second-stage treatment and advanced treatment, can be used as industrial colling, also can be used as afforestation, water and spill road, toilet flushing etc.For enabling municipal effluent recycle, just for the feature of municipal effluent type to be dealt with, corresponding wastewater deep treatment process must be adopted, performs corresponding water quality standard.
But the objectionable impurities such as Phosphorus in Municipal Water with Natural, nitrogen is more, bring very large inconvenience to wastewater ocean disposal.
Summary of the invention
For prior art Problems existing, the invention provides a kind of Sewage treatment systems with A2/O biological treatment system, utilize anaerobic pond, anoxic pond, Aerobic Pond to carry out advanced treatment to sewage, effectively remove the objectionable impurities such as Phosphorus in Municipal Water with Natural, nitrogen; Meanwhile, carry out three precipitations, mud is thoroughly separated with water, and recycles, make full use of resource, energy-conserving and environment-protective.
Technical scheme of the present invention is: a kind of with A
2the Sewage treatment systems of/O biological treatment system, comprises the sewage pumping station of band grid, aerated grit chamber, preliminary sedimentation tank, sludge thickener, second pond, mud nitrification tank, antisepsis contact tank, anaerobic pond, anoxic pond, Aerobic Pond, three heavy ponds;
Raw waste water enters the sewage pumping station of band grid, after grid process, pipeline connection enters aerated grit chamber, after carrying out sediment by aeration process, the connection of pipeline stream enters preliminary sedimentation tank, through preliminary sedimentation tank process, the sludge pipe connection connected by the sewer line after process after entering second pond, process enters sludge thickener;
Described sludge thickener carries out concentration to mud, is connected by the sludge pipe after process and enters mud nitrification tank, recycle after mud nitrification tank nitration treatment, is connected by the sewer line after process and enters second pond;
Described second pond carries out secondary sedimentation process to the sewage flowed into, and is connected by the sewer line after process and enters antisepsis contact tank, after antisepsis contact tank reaction treatment, pass into A
2/ O biological treatment system, namely passes into anaerobic pond, anoxic pond, Aerobic Pond carries out advanced treatment, and is connected by the sewer line after process and enter three heavy ponds, carries out third time precipitation process, the water outlet after process is recycled, by excess sludge cleaning discharge.
Further, described grid is harrowed three parts by the grid bar be parallel to each other, grid frame and scarfing cinder and is formed.
Further, the planeform of described aerated grit chamber is rectangle, and transverse section mostly is trapezoidal or rectangle, and have sand setting funnel or sand trap at the bottom of pond, side is provided with aeration tube.
Further, described sewage passes into anaerobic pond, anoxic pond, Aerobic Pond, and residence time ratio is 5:1.4:1-1.2.
Further, described anaerobic pond, anoxic pond inside install 1 stirrer respectively.
Further, described second pond adopts flat flow, and rectangular sedimentation tank plane is rectangular, is made up of water feed apparatus, discharging device, settling region, buffer zone, mud district and mud discharging device.
Further, described antisepsis contact tank adopts chlorination, and duration of contact is 30 ± 5min.
Further, described sludge thickener adopts centrifugal concentrating method, and centrifugal force is 500-3000 times of gravity.
The invention has the beneficial effects as follows:
(1) anaerobic pond, anoxic pond, Aerobic Pond run in without the need to dispensing, anaerobic pond, anoxic pond only need light and slow stirring, with do not increase dissolved oxygen for degree, working cost is low;
(2) under anaerobism, anoxic, aerobic alternate run condition, thread fungus can not breed in a large number, avoids sludge bulking;
(3) integrated artistic of the present invention is simple, and total residence time is short, and treatment effect is stablized, and effluent quality is good;
(4) sludge yield is few, and Sludge Property is stablized;
(5) water yield, water quality impact load can be born, even if also there is larger shock-resistant ability to high-concentration waste water;
(6) carry out three precipitations, mud is thoroughly separated with water, and recycles, make full use of resource, energy-conserving and environment-protective.
Accompanying drawing explanation
As shown in Figure 1, be structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, a kind of with A
2the Sewage treatment systems of/O biological treatment system, comprises the sewage pumping station 1 of band grid, aerated grit chamber 2, preliminary sedimentation tank 3, sludge thickener 4, second pond 5, mud nitrification tank 6, antisepsis contact tank 7, anaerobic pond 9, anoxic pond 10, the heavy pond 12 of Aerobic Pond 11, three.
Sewage pumping station 1 scale should be determined by the day output of sewage work.Grid adopts mechanical grille, generally harrows three parts by the grid bar be parallel to each other, grid frame and scarfing cinder and forms.Grid slag know that mode is relevant with the scarfing cinder amount of grid, when grid interception the grid quantity of slag be greater than 0.2m
3generally adopt mechanical scarfing cinder during/d, adopt mechanical scarfing cinder to improve working conditions, and be beneficial to raising automatization level.The planeform of aerated grit chamber 2 is rectangle, and transverse section mostly is trapezoidal or rectangle, and have sand setting funnel or sand trap at the bottom of pond, side is provided with aeration tube.Carry out aeration at settling pit 2 can make to produce friction between particle, the organism friction being wrapped in particle surface is removed, produces clean sand setting, improve the removal efficiency of particle simultaneously.
A
2/ O aeration tank, it is the core of process, first sewage after the process of B-grade sewage treatment system enter anaerobic pond 9, mix with the phosphorus containing sludge refluxed from second pond synchronously entered, described anaerobic pond 9 discharges phosphorus, raises the concentration of phosphor in sewage, simultaneously, microorganism cells absorbs dissolved organic matter, reduces BOD concentration in sewage; In addition, a part of NH is removed in the synthesis of cell
3--N, by NH in sewage
3--N is reduced to N
2, be released in air.Enter anoxic pond through the reacted mixed solution of anaerobic pond 9, carry out denitrogenation processing.Enter Aerobic Pond through the reacted sewage of anoxic pond 10, in Aerobic Pond 11, organism is degraded by microbial biochemical, and continues to decline; Organonitrogen is then nitrated by ammonification, and NH3--N content is significantly declined, along with nitrifying process, and NH
3-the concentration of-N but increases, and phosphorus, along with the excess ingestion of polyP bacteria, can decline more fast.So A2/O Technology Section is to complete organic removal, nitrated denitrogenation, the excess ingestion of phosphorus and the function such as to be gone out simultaneously, and the prerequisite of denitrogenation is that NH3--N should be nitrated safely, and Aerobic Pond can complete this function, and anoxic pond then completes denitrification functions.Anaerobic pond 9 and Aerobic Pond 11 have combined phosphorus removal functional.According to setup parameter, calculate volume, sludge quantity, the aeration rate of aeration tank.Anaerobism, denitrification, aerobic residence time ratio are 5.0:1.4:1.Anoxic and anaerobism section install two stirrers, to keep the suspended state of active sludge.Micro-hole aerator is adopted in aeration tank.
Second pond 5 adopts flat flow.Rectangular sedimentation tank plane is rectangular, is generally made up of water feed apparatus, discharging device, settling region, buffer zone, mud district and mud discharging device etc.Sludge discharge way has mechanical dredge and multibuchet spoil disposal two kinds.Mud formula is inhaled in the many employings of second pond 5 spoil disposal.Rectangular sedimentation tank sedimentation effect is good, and impact load and poikilothermism are strong, and floor plan is compact, easy construction.Antisepsis contact tank 7 adopts chlorination, and chlorine dosage should be determined by day output.Duration of contact is generally 30min.Sludge thickener adopts centrifugal concentrating method, is applicable to the occasion of the difficult dewatered sludges such as concentrated residual active sludge or narrow field.Centrifugal force can reach 500-3000 times of gravity, thus greatly can improve thickening efficiency.
The present invention utilizes anaerobic pond 9, anoxic pond 10, Aerobic Pond 11 pairs of sewage to carry out advanced treatment, effectively removes the objectionable impurities such as Phosphorus in Municipal Water with Natural, nitrogen; Meanwhile, carry out three precipitations 12, mud is thoroughly separated with water, and recycles, make full use of resource, energy-conserving and environment-protective.
Although prior art scheme of the present invention and preferred embodiment statement as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when doing various changes, substitute and retouching.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (8)
1. one kind with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: comprise the sewage pumping station (1) of band grid, aerated grit chamber (2), preliminary sedimentation tank (3), sludge thickener (4), second pond (5), mud nitrification tank (6), antisepsis contact tank (7), anaerobic pond (9), anoxic pond (10), Aerobic Pond (11), three heavy ponds (12);
Raw waste water enters the sewage pumping station (1) of band grid, after grid process, pipeline connection enters aerated grit chamber (2), after carrying out sediment by aeration process, the connection of pipeline stream enters preliminary sedimentation tank (3), through preliminary sedimentation tank (3) process, the sludge pipe connection connected by the sewer line after process after entering second pond (5), process enters sludge thickener (4);
Described sludge thickener (4) carries out concentration to mud, sludge pipe after process is connected and enters mud nitrification tank (6), recycle after mud nitrification tank nitration treatment, the sewer line after process is connected and enters second pond (5);
Described second pond (5) carries out secondary sedimentation process to the sewage flowed into, and is connected by the sewer line after process and enters antisepsis contact tank (7), after antisepsis contact tank reaction treatment, pass into A
2/ O biological treatment system, namely pass into anaerobic pond (9), anoxic pond (10), Aerobic Pond (11) carry out advanced treatment, and the sewer line connection after process is entered three heavy ponds (12), carry out third time precipitation process, water outlet after process is recycled, excess sludge cleaning is discharged.
2. one according to claim 1 is with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: described grid is harrowed three parts by the grid bar be parallel to each other, grid frame and scarfing cinder and formed.
3. one according to claim 1 is with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: the planeform of described aerated grit chamber (2) is rectangle, and transverse section mostly is trapezoidal or rectangle, and have sand setting funnel or sand trap at the bottom of pond, side is provided with aeration tube.
4. one according to claim 1 is with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: described sewage passes into anaerobic pond (9), anoxic pond (10), Aerobic Pond (11), and residence time ratio is 5:1.4:1-1.2.
5. one according to claim 1 is with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: described anaerobic pond (9), anoxic pond (10) inside install 1 stirrer respectively.
6. one according to claim 1 is with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: described second pond (5) adopts flat flow, and rectangular sedimentation tank plane is rectangular, is made up of water feed apparatus, discharging device, settling region, buffer zone, mud district and mud discharging device.
7. one according to claim 1 is with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: described antisepsis contact tank (7) adopts chlorination, and duration of contact is 30 ± 5min.
8. one according to claim 1 is with A
2the Sewage treatment systems of/O biological treatment system, is characterized in that: described sludge thickener (4) adopts centrifugal concentrating method, and centrifugal force is 500-3000 times of gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166893.7A CN105016563A (en) | 2014-04-23 | 2014-04-23 | Sewage treatment system with A2/O biological treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166893.7A CN105016563A (en) | 2014-04-23 | 2014-04-23 | Sewage treatment system with A2/O biological treatment system |
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| CN105016563A true CN105016563A (en) | 2015-11-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106800355A (en) * | 2016-11-28 | 2017-06-06 | 河海大学 | A kind of method that utilization microorganism induction mineralising processes sewage |
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2014
- 2014-04-23 CN CN201410166893.7A patent/CN105016563A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106800355A (en) * | 2016-11-28 | 2017-06-06 | 河海大学 | A kind of method that utilization microorganism induction mineralising processes sewage |
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Application publication date: 20151104 |