CN201722254U - Double sludge denitrifying and dephosphorizing treatment system - Google Patents
Double sludge denitrifying and dephosphorizing treatment system Download PDFInfo
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- CN201722254U CN201722254U CN201020196362XU CN201020196362U CN201722254U CN 201722254 U CN201722254 U CN 201722254U CN 201020196362X U CN201020196362X U CN 201020196362XU CN 201020196362 U CN201020196362 U CN 201020196362U CN 201722254 U CN201722254 U CN 201722254U
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Abstract
The utility model relates to a double sludge denitrifying and dephosphorizing treatment system, which comprises a primary sedimentation unit, an aerated biofilter unit, a hydrolysis acidification unit, an anaerobic unit, an oxygen deficit unit and two sedimentation tank units. In the double sludge denitrifying and dephosphorizing treatment system, the aerated biofilter unit is used for nitration so as to eliminate a nitration tank of the ordinary denitrifying and dephosphorizing system, reduce the occupation area of the system, and improve the denitrifying and dephosphorizing effect, the stability and the shock load resisting capacity. In the sludge treatment system, an intermediate sedimentation unit and a secondary aerated biofilter unit are omitted, so the occupation area of the system is further saved, waterpower retaining time is shortened, and the system cost is reduced. Partial carbon source is supplied for the system by primary sedimentation sludge hydrolysis, the medicament dosage cost is reduced, and simultaneously the amount of residual sludge is reduced.
Description
[technical field]
Technical solutions of the utility model belong to the sewage treatment area of carbon-nitrogen ratio ultralow (C/N＜3), are specifically related to a kind of pair of mud denitrogenation dephosphorizing treatment system.
[background technology]
According to the regulation of " urban wastewater treatment firm pollutant emission standard GB18918-2002 ", town sewage after treatment, the sewage of discharging must meet TN≤15mg/L, NH
4 +-N≤5mg/L, TP≤0.5mg/L.Therefore, how the organic while in removing sewage, reduce the NH in the sewage effluent
4 +The content of-N, TN, TP becomes sewage disposal and faces one of urgent task of technology.
In the sewage in the many cities of China, organic concentration is all lower, and the carbon source content of sewage itself is lower, can not satisfy the requirement of denitrification, dephosphorization, the efficient that conventional denitrification dephosphorization system carries out denitrogenation dephosphorizing is lower, needs additional carbon usually, has increased running cost.
Along with the continuous development of denitrification dephosphorization technique, the denitrification synchronous denitrogen dephosphorus technology has obtained using widely gradually.
The denitrification synchronous denitrogen dephosphorus technology mainly contains single sludge system and two sludge system.Single sludge system mainly contains technologies such as UCT, MUCT, BCFS, Bio-Denipho, SBR, and two sludge systems mainly contain Wanner technology, DEPHANOX technology, A
2N technology and A
2NSBR technology.
In single sludge system, denitrifying bacterium, nitrobacteria and polyP bacteria are present in the mixed solution that increases that suspends simultaneously, experience anaerobic/anoxic/aerobic three kinds of environment successively.But, just inconsistent like this because nitrobacteria needs the aerobic time longer with the required best SRT of polyP bacteria, finally cause growth of denitrifying bacterium and activity to be suppressed.In addition, also there are competition in denitrifying bacterium and polyP bacteria aspect organic substrates.Moreover, because aerobic oxidation and the loss of organism causes the breeding of filamentous bacterium.These factors have caused the efficiency ratio of sewage disposal lower, and a large amount of nutritive substance nitrogen phosphorus are retained in the sewage.
In two sludge systems, nitrobacteria separately exists in a fixation reaction pond or the reaction column, to be independent of denitrifying bacterium.Like this, just solved the long and required inconsistent defective of best SRT of polyP bacteria of nitrobacteria aerobic time of needs in single sludge system, denitrification phosphorus-collecting bacterium and nitrobacteria can both grown under the optimum environment separately.In addition, at two sludge systems, nitrobacteria and polyP bacteria are in independently in the system, the organism that the nitration reaction stage consumes, are used as the carbon source of denitrification denitrogenation, dephosphorization, reduce the cost of sewage disposal.It is the low especially and nitrogen of organic content, the higher relatively sewage of phosphorus content that but C/N is lower than 3 sewage, because the carbon source content of sewage itself is lower, raw waste water enters anaerobic pond, and to carry out PHB efficient synthetic and phosphorus release relatively poor.If in order to improve the efficient that synthetic PHB and phosphorus discharge, the volume of anaerobic pond is bigger, needs a large amount of additional carbons.In addition, remove and surmount the ammonia nitrogen that carries in the mud by increasing two stage biological aeration nitration processes, like this, the corresponding running cost that increases system.
[utility model content]
In order to solve former water C/N when ultralow, the volume of anaerobic pond is big in the prior art, system cost is higher, big these technical problems that waits of added amount of chemical, the utility model provides a kind of pair of mud denitrogenation dephosphorizing treatment system, and described pair of mud denitrogenation dephosphorizing treatment system comprises: the first heavy unit that is used for raw waste water is carried out preliminary sedimentation; Be used for the first heavy supernatant liquor that discharge described just heavy unit is carried out nitrated BAF unit, with described just heavy unit just the water port of heavy supernatant liquor be communicated with; Be used for the primary sludge that the discharge described just heavy unit acidification that is hydrolyzed is obtained the acidication unit of carbon source, be communicated with the mud discharging mouth of described just heavy unit primary sludge; Be used for returned sluge is carried out the anaerobic unit of anaerobic phosphorus release, be communicated with described acidication unit; Be used for the anoxic unit that denitrogenation dephosphorizing is handled is carried out in mud and the unitary water outlet of described BAF after handling through described anaerobic unit; Mud after being used for described anoxic unit handled and sewage carries out mud-water separation and carry returned sluge to arrive the second pond unit of described anaerobic unit.
According to an optimal technical scheme of the present utility model: described just heavy unit is a preliminary sedimentation tank.
According to an optimal technical scheme of the present utility model: described anaerobic unit is an anaerobic pond.
According to an optimal technical scheme of the present utility model: described acidication unit is the primary sludge that described just heavy unit the is discharged acidifying hydrolysis acidification pool that is hydrolyzed.
According to an optimal technical scheme of the present utility model: described BAF unit is for to carry out nitrated BAF with the ammonia nitrogen for the nitrobacteria substrate.
According to an optimal technical scheme of the present utility model: described anoxic unit is an anoxic pond of utilizing mud after the denitrification phosphorus-collecting bacterium is handled described anaerobic unit and the unitary water outlet of described BAF to carry out denitrification nitrogen and phosphorus removal.
According to an optimal technical scheme of the present utility model: described pair of mud denitrogenation dephosphorizing treatment system also comprises: be used for the first heavy supernatant liquor that discharge described just heavy unit is transported to the unitary topping-up pump of described BAF.
According to an optimal technical scheme of the present utility model: described pair of mud denitrogenation dephosphorizing treatment system also comprises: be used for the primary sludge that discharge described just heavy unit is transported to unitary first peristaltic pump of described acidication.
According to an optimal technical scheme of the present utility model: described pair of mud denitrogenation dephosphorizing treatment system also comprises: second peristaltic pump that is used for the unitary returned sluge of described second pond is transported to described anaerobic unit.
In the two mud denitrogenation dephosphorizing treatment systems of the utility model, owing to undertaken nitrated by the BAF unit, avoid the use of nitrification tank in the conventional denitrification dephosphorization system, reduced the floor space of system, improved effect, stability and the capacity of resisting impact load of denitrogenation dephosphorizing.In addition, former water can provide carbon source through the mud that just heavy unit precipitates for anaerobic phosphorus release through acidication, has saved the input amount of part additional carbon, has reduced medicament expense usefulness, and the volatile lipid acid that acidication produces has improved the efficient of anaerobic phosphorus release.Primary sludge can provide carbon source for system through acidication, has reduced surplus sludge volume simultaneously.The former water of post precipitation directly enters the BAF unit, has avoided entering anaerobic pond and has mixed with returned sluge, reduced the volume of anaerobic unit greatly, and has solved the problem that ammonia nitrogen that mud carries causes that the water outlet ammonia nitrogen can not stably reaching standard.And, in the utility model sludge treating system,, further reduced the floor space and the hydraulic detention time of system owing to saved medium sediment pool and the unitary use of secondary BAF, reduced the cost of system simultaneously.
[description of drawings]
Fig. 1 is the two mud denitrogenation dephosphorizing treatment systems of the utility model.
[embodiment]
Below in conjunction with accompanying drawing technical solutions of the utility model are elaborated:
Figure is the structural representation of the two mud denitrogenation dephosphorizing treatment system embodiment of the utility model sewage.As shown in Figure 1, the two mud denitrogenation dephosphorizing treatment systems of present embodiment comprise: just heavy unit 101, BAF unit 102, acidication unit 103, anaerobic unit 104, anoxic unit 105 and second pond unit 106.
Described just heavy unit 101 is used for raw waste water is carried out preliminary sedimentation.
In optimal technical scheme of the present utility model, described just heavy unit 101 is a preliminary sedimentation tank.
Described BAF unit 102 is used for carrying out nitrated to the first heavy supernatant liquor that discharge described just heavy unit 101.Described BAF unit 102 is communicated with the water port that just heavy supernatant liquor is discharged in described just heavy unit 101.
Conventional nitrification tank volume is big in order to solve, water outlet concentration of suspension height, it is nitrated that the utility model adopts the supernatant liquor that discharges heavy unit 101 at the beginning of 102 pairs of the described BAF unit to carry out, and reduced greatly sewage is carried out unitary volume of nitration treatment and floor space.Hydraulic detention time only is that nitrification effect can reach 90-95% about 2-2.5h in described BAF unit 102.
In optimal technical scheme of the present utility model, described BAF unit 102 is for to carry out nitrated BAF with the ammonia nitrogen for the nitrobacteria substrate.
Described acidication unit 103 is used for that the acidifying that is hydrolyzed obtains carbon source to the primary sludge that discharge described just heavy unit 101.Described acidication unit 103 is communicated with the mud discharging mouth that primary sludge is discharged in described just heavy unit 101.The purpose that described acidication unit 103 is set mainly is rationally to utilize the internal system carbon source, by the primary sludge acidication, for system's denitrogenation dephosphorizing provides a certain amount of carbon source, reducing medicament expense uses, solving needs in the conventional denitrification dephosphorization system to add the technical problem that a large amount of carbon sources is carried out denitrification nitrogen and phosphorus removal, and the voltaile fatty acid VFA that produces of primary sludge acidication can improve and releases the phosphorus effect.Effective utilization of primary sludge has simultaneously reduced the surplus sludge volume of system.
In optimal technical scheme of the present utility model, described acidication unit 103 is acidifying hydrolysis acidification pool that the described primary sludge that just sinks unit 101 discharges is hydrolyzed.
Described anaerobic unit 104 is used for returned sluge is carried out anaerobic phosphorus release.Described anaerobic unit 104 is communicated with described acidication unit 103.The supernatant liquor that is rich in voltaile fatty acid VFA that 103 hydrolysis of described acidication unit produce carries out anaerobic phosphorus release for anaerobic pond mud provides carbon source, can promote the abundant release of phosphorus by the mode of additional carbon simultaneously.The returned sluge here specifically is meant the returned sluge of discharging through described second pond unit 106 post precipitations.
In optimal technical scheme of the present utility model, described anaerobic unit 104 is an anaerobic pond.
Described anoxic unit 105 is used for the mud after handling through described anaerobic unit 104 and the water outlet of described BAF unit 102 are carried out denitrification nitrogen and phosphorus removal.Owing to be rich in nitric nitrogen in the water outlet after handling through described BAF unit 102, and carried out sufficient the mixing in described anoxic unit 105 through the mud behind described anaerobic unit 104 anaerobic phosphorus releases.In described anoxic unit 105, the denitrification phosphorus-collecting bacterium is that electron acceptor(EA) carries out denitrification nitrogen and phosphorus removal with the nitric nitrogen, has improved the effect of denitrogenation dephosphorizing.Short-time aeration is carried out in last lattice chamber of anoxic pond, and about 20 minutes of aeration time with the nitrogen gas stripping of realizing that denitrification produces, makes sludge activity regeneration simultaneously, improves sludge settling, the phosphorus of small amount of residual can be removed by aerobic suction phosphorus in addition.
In optimal technical scheme of the present utility model, described anoxic unit 105 is carried out the anoxic pond of denitrogenation dephosphorizing for the water outlet of mud after utilizing the denitrification phosphorus-collecting bacterium to described anaerobic unit 104 processing and described BAF unit 102.
Described second pond unit 106 is used for the mud after described anoxic unit 105 processing and sewage carries out mud-water separation and carry returned sluge to arrive described anaerobic unit 104.The mud that precipitates through described second pond unit 106 is divided into two portions.A part flows to described anaerobic unit 104 with the form of returned sluge, enters next circulation.A part is discharged with the form of excess sludge in addition, to realize the purpose of system's dephosphorization.Water outlet supernatant liquor through described second pond unit 106 post precipitations enters water drain or conduct greening water.
In optimal technical scheme of the present utility model, described pair of mud denitrogenation dephosphorizing treatment system also comprises topping-up pump 107.Described topping-up pump 107 is used for the first heavy supernatant liquor that discharge described just heavy unit 101 is transported to described BAF unit 102.
In optimal technical scheme of the present utility model, described pair of mud denitrogenation dephosphorizing treatment system also comprises first peristaltic pump 108.Described first peristaltic pump 108 is used for the primary sludge that discharge described just heavy unit 101 is transported to described acidication unit 103.
In optimal technical scheme of the present utility model, described pair of mud denitrogenation dephosphorizing treatment system also comprises second peristaltic pump 109.Described second peristaltic pump 109 is used for the returned sluge of described second pond unit 106 is transported to second peristaltic pump 109 of described anaerobic unit 104.
The final outflow water organism of the two mud denitrogenation dephosphorizing treatment systems of the utility model is about 30mg/L, about ammonia nitrogen 3mg/L, water outlet TP is lower than 0.5mg/L, almost detects less than nitric nitrogen, and water outlet reaches the one-level A standard among " urban wastewater treatment firm pollutant emission standard " GB18918-2002.
In the two mud denitrogenation dephosphorizing treatment systems of the utility model, owing to undertaken nitrated by the BAF unit, avoid the use of nitrification tank in the conventional denitrification dephosphorization system, reduced the floor space of system, improved effect, stability and the capacity of resisting impact load of denitrogenation dephosphorizing.In addition, former water can provide carbon source through the mud that just heavy unit precipitates for anaerobic phosphorus release through acidication, has saved the input amount of part additional carbon, has reduced medicament expense usefulness, and the voltaile fatty acid of acidication generation has improved the effect of anaerobic phosphorus release.Primary sludge has obtained effective utilization, has reduced the surplus sludge volume of system.The former water of post precipitation taps into into the BAF unit, has avoided entering anaerobic pond and has directly mixed with returned sluge, has reduced the volume of anaerobic unit greatly.And, in the utility model sludge treating system,, further saved the floor space of system owing to saved medium sediment pool and the unitary use of secondary BAF, reduced hydraulic detention time, reduced the cost of system simultaneously.
Above content be in conjunction with concrete optimal technical scheme to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (9)
1. two mud denitrogenation dephosphorizing treatment system, it is characterized in that: described pair of mud denitrogenation dephosphorizing treatment system comprises:
Be used for raw waste water is carried out the first heavy unit (101) of preliminary sedimentation;
Be used for the first heavy supernatant liquor that discharge described just heavy unit (101) is carried out nitrated BAF unit (102), be communicated with the water port of the just heavy supernatant liquor in described just heavy unit (101);
Be used for that the acidifying that is hydrolyzed obtains the acidication unit (103) of carbon source to the primary sludge that discharge described just heavy unit (101), be communicated with the mud discharging mouth of described just heavy unit (101) primary sludge;
Be used for returned sluge is carried out the anaerobic unit (104) of anaerobic phosphorus release, be communicated with described acidication unit (103);
Be used for the mud after handling through described anaerobic unit (104) and the water outlet of described BAF unit (102) are carried out the anoxic unit (105) that denitrification nitrogen and phosphorus removal is handled;
Mud after being used for described anoxic unit (105) handled and sewage carries out mud-water separation and carry returned sluge to arrive the second pond unit (106) of described anaerobic unit (104).
2. according to described pair of mud denitrogenation dephosphorizing of claim 1 treatment system, it is characterized in that described just heavy unit (101) is a preliminary sedimentation tank.
3. according to described pair of mud denitrogenation dephosphorizing of claim 1 treatment system, it is characterized in that described anaerobic unit (104) is an anaerobic pond.
4. according to described pair of mud denitrogenation dephosphorizing of claim 1 treatment system, it is characterized in that described acidication unit (103) is acidifying hydrolysis acidification pool that the described primary sludge that just sinks unit (101) discharge is hydrolyzed.
5. according to described pair of mud denitrogenation dephosphorizing of claim 1 treatment system, it is characterized in that described BAF unit (102) is for to carry out nitrated BAF with the ammonia nitrogen for the nitrobacteria substrate.
6. according to described pair of mud denitrogenation dephosphorizing of claim 1 treatment system, it is characterized in that described anoxic unit (105) is carried out the anoxic pond of denitrification nitrogen and phosphorus removal for the water outlet of mud after utilizing the denitrification phosphorus-collecting bacterium to described anaerobic unit (104) processing and described BAF unit (102).
7. according to described pair of mud denitrogenation dephosphorizing of the arbitrary claim of claim 1 to 6 treatment system, it is characterized in that described pair of mud denitrogenation dephosphorizing treatment system also comprises: the topping-up pump (107) that is used for the first heavy supernatant liquor that discharge described just heavy unit (101) is transported to described BAF unit (102).
8. according to described pair of mud denitrogenation dephosphorizing of the arbitrary claim of claim 1 to 6 treatment system, it is characterized in that described pair of mud denitrogenation dephosphorizing treatment system also comprises: first peristaltic pump (108) that is used for the primary sludge that discharge described just heavy unit (101) is transported to described acidication unit (103).
9. according to described pair of mud denitrogenation dephosphorizing of the arbitrary claim of claim 1 to 6 treatment system, it is characterized in that described pair of mud denitrogenation dephosphorizing treatment system also comprises: second peristaltic pump (109) that is used for the returned sluge of described second pond unit (106) is transported to described anaerobic unit (104).
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| CN201020196362XU CN201722254U (en) | 2010-05-18 | 2010-05-18 | Double sludge denitrifying and dephosphorizing treatment system |
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| CN201020196362XU CN201722254U (en) | 2010-05-18 | 2010-05-18 | Double sludge denitrifying and dephosphorizing treatment system |
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| CN201722254U true CN201722254U (en) | 2011-01-26 |
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2010
- 2010-05-18 CN CN201020196362XU patent/CN201722254U/en not_active Expired - Lifetime
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