CN203319831U - Sewage treating device - Google Patents
Sewage treating device Download PDFInfo
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- CN203319831U CN203319831U CN2013203897950U CN201320389795U CN203319831U CN 203319831 U CN203319831 U CN 203319831U CN 2013203897950 U CN2013203897950 U CN 2013203897950U CN 201320389795 U CN201320389795 U CN 201320389795U CN 203319831 U CN203319831 U CN 203319831U
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- 239000010865 sewage Substances 0.000 title claims abstract description 84
- 239000010802 sludge Substances 0.000 claims abstract description 184
- 238000006243 chemical reaction Methods 0.000 claims abstract description 179
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 claims abstract description 18
- 229910052567 struvite Inorganic materials 0.000 claims abstract description 18
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 claims description 48
- 239000006228 supernatant Substances 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 238000001556 precipitation Methods 0.000 claims description 18
- 238000010992 reflux Methods 0.000 claims description 16
- 239000003814 drug Substances 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 13
- 230000018044 dehydration Effects 0.000 claims description 12
- 238000006297 dehydration reaction Methods 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 9
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 238000004377 microelectronic Methods 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 63
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 36
- 230000000694 effects Effects 0.000 abstract description 23
- 230000008569 process Effects 0.000 abstract description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 18
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 18
- 239000011574 phosphorus Substances 0.000 abstract description 18
- 239000003344 environmental pollutant Substances 0.000 abstract description 12
- 231100000719 pollutant Toxicity 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000013049 sediment Substances 0.000 abstract 2
- 230000007774 longterm Effects 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 13
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 10
- 238000005273 aeration Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 4
- 230000001376 precipitating effect Effects 0.000 description 4
- 238000009288 screen filtration Methods 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 238000011112 process operation Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002686 phosphate fertilizer Substances 0.000 description 2
- 239000004061 uncoupling agent Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000002525 ultrasonication Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model belongs to the technical field of sewage treatment, and particularly relates to a sewage treating device. The sewage treating device comprises a water inlet system, a sewage aerobic reaction tank, a sludge anaerobic reaction tank, a nitrogen and phosphorus treating system, a water outlet system and an excess sludge treating system. The sludge anaerobic reaction tank comprises a main anaerobic reaction region and a sediment exchange region. The nitrogen and phosphorus treating system is a struvite nitrogen and phosphorus treating system which comprises an agentia mixing reaction region and a sediment region. According to the sewage treating device, excess sludge can be reduced and nitrogen and phosphorus pollutants can be efficiently removed at the same time, the effect for reducing sludge is good and stable, the effect for removing the nitrogen and phosphorus pollutants is obvious, building cost and running cost are low, the long-term economic benefits, environmental benefits and social benefits are achieved, and automatic management of the whole process can be achieved.
Description
Technical field
The utility model belongs to the sewage treatment process field, is specifically related to a kind of waste disposal plant.
Background technology
Activated sludge process is widely used in municipal sewage plant because it has higher organic pollutant removal effect.Yet, existing Activated Sludge Process working cost is relatively high, the wherein processing of excess sludge, disposal have accounted for very large proportion, usually in 30% ~ 60% left and right, and most of mud directly carries out landfill disposal after dehydration (water ratio 80% left and right), this has produced huge expense on the one hand, has also brought on the other hand serious secondary pollution problem.In addition, traditional biological denitrification phosphorous removal technique has and removes the advantages such as carbon, nitrogen, phosphorus and processing cost are low simultaneously and be used widely, but often can't take into account the requirement of denitrogenation and dephosphorization in the denitrogenation dephosphorizing process simultaneously.In practical application, the quantity discharged of nitrogen and phosphorus all is difficult to reach the respective standard of national sewage disposal, has had a strong impact on wastewater treatment efficiency.
Therefore, reduce mud disposal costs and alleviate the secondary pollution problem how, and can solve the contradiction of high-efficient denitrification and dephosphorization simultaneously, find the Technology that is applicable to the Economic development needs and reaches emission standard, be subject matter urgently to be resolved hurrily in current sewage treatment process.
Drawback based on existing in traditional denitrification dephosphorization technique, the recent domestic investigator proposes the biological dephosphorize denitrification novel process, as the improvement A based on traditional technology
2/ O technique, BICT technique etc., or the denitrification dephosphorization based on new theory, short-cut nitrification and denitrification, anaerobic ammonia oxidation process etc.These novel procesies require higher to numerical control and operational conditions, and its mechanism, technological design and influence factor thereof still be in the exploratory stage, can't effectively be popularized in a short time.
Aspect mud decrement, in Practical Project normally in Sewage treatment systems the sludge reflux section add chemistry (ozone, acid or alkali) or physics (thermal treatment, ultrasonication or mechanical treatment) processing unit, excess sludge can reduce more than 60%, even can remove fully, but chemistry or physical treatment is with high costs, can increase aeration tank organic loading and aeration energy consumption simultaneously, affect the practicality of technique.Also can in technique, add uncoupling agents, the mud decrement rate can reach 50% ~ 80%, but the uncoupling agents that the method adds may cause excessive toxic action to microorganism, affects the Pollutant Treatment performance of technique itself, and has increased running cost.The reducing biological sludge technology is to realize that by changing microorganism living environment and the effect of itself mud simplifies, wherein aerobic-precipitation-anaerobism (OSA) technique is to realize a kind of novel process of sludge reduction in sewage treatment process simultaneously, its essence is at conventional activated sludge process sludge reflux section access one specific anaerobic sludge reactor, make microorganism in aerobic and anaerobism alternate run environment.With chemistry, physical technique, compare, this technique can realize 20% ~ 60% reduction of mud under the prerequisite that does not affect effluent quality, and working cost is low, non-secondary pollution.Yet, OSA technique has changed microbial species group structure and the sludge quality in former aerobic activated sludge to a certain extent, in the sludge reduction effect, affected the system sludge activity, and then affect the wastewater treatment efficiency of technique, as increased the weight of process system nitrogen and phosphorus pollutants burden, thereby make the water outlet total nitrogen total phosphorus increase.
As can be seen here, in existing sewage treatment process, chemistry, physics, bioprocess technology technical finesse excess sludge or biological dephosphorize denitrification novel process be some problems of ubiquity all, can't in sewage treatment process, realize the efficient removal of excess sludge and nitrogen and phosphorus pollutants simultaneously.And OSA technique has larger mud decrement potential, therefore constantly optimize improvement OSA technique, improve the performance of this technique each side, give full play to OSA sludge reduction effect, and improved to realize the efficient removal of nitrogen and phosphorus pollutants the application of promoting the OSA sewage treatment process is had to extremely important meaning.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and a kind of waste disposal plant is provided, and described device can be realized excess sludge reduction and the removal of nitrogen phosphorus efficiency in sewage simultaneously.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of waste disposal plant, comprise water inlet system, sewage aerobic reaction tank, sludge anaerobic reaction tank, nitrogen phosphorus treatment system, outlet system, excess sludge treatment system;
Water inlet system is connected with the sewage aerobic reaction tank, and the sewage aerobic reaction tank is connected with sludge anaerobic reaction tank, excess sludge treatment system and outlet system, and the sludge anaerobic reaction tank is connected with nitrogen phosphorus treatment system and excess sludge treatment system; For the anaerobic reaction effect that guarantees the sludge anaerobic reaction tank and the reaction conditions of subsequent technique denitrogenation dephosphorizing, described sludge anaerobic reaction tank comprises anaerobic main reaction zone and precipitation switched area; In order to guarantee nitrogen phosphorus treatment system energy while high-efficient denitrification and dephosphorization and to reclaim rich phosphorous sludge, described nitrogen phosphorus treatment system is the struvite nitrogen phosphorus treatment system that comprises medicament hybrid reaction district and settling region.
Preferably, in order to provide preferably the anaerobic reaction condition and, for the subsequent technique denitrogenation dephosphorizing provides reaction environment preferably, described sludge anaerobic reaction tank is divided into two lattice.The first lattice are the anaerobic main reaction zone, whipping appts is set and is stirred, and anaerobic sludge is mixed; The second lattice are for precipitating switched area, and the anaerobic sludge flowed out from the first lattice bottom enters the second lattice and precipitated, and the residence time is more than 60min, and the mud precipitated through the second lattice flows out from bottom and exchanges to described sewage aerobic reaction tank continuation reaction.
Preferably, the impact of excess sludge being processed in order to eliminate the top layer scum silica frost, described sludge anaerobic reaction tank top arranges top layer scum silica frost removal device, carries out the processing of sludge anaerobic reaction tank excess sludge after scum silica frost is struck off again; In order to realize that mud-water separation is to reach struvite nitrogen phosphorus treatment effect preferably, described sludge anaerobic reaction tank precipitation middle and upper part, switched area arranges screen cloth, and the mud supernatant liquor after screen filtration is entered described nitrogen phosphorus treatment system from precipitation middle and upper part, switched area; In order to keep screen cloth not stop up, described sludge anaerobic reaction tank arranges the back flushing pipeline, utilizes the supernatant liquor periodic reverse after filtering to rinse screen cloth.
Preferably, in order to realize the wastewater efficient Nitrogen/Phosphorus Removal and to reclaim rich phosphorous sludge, described nitrogen phosphorus treatment system is struvite nitrogen phosphorus treatment system, and the mud supernatant liquor after the sludge anaerobic reaction tank is processed enters nitrogen phosphorus treatment system, and system is divided into two lattice.First lattice are medicament hybrid reaction zone, whipping appts is set and is stirred, and medicament is mixed; Second lattice is settling region, reclaims the settling region mud that is rich in struvite through sludge dewatering simultaneously, and dehydration filtrate and settling region supernatant liquor all are back to described sewage aerobic reaction tank and continue reaction.
Preferably, in order to regulate sewage aerobic reaction tank aeration rate and to make mud wherein in abundant admixture, described sewage aerobic reaction tank is provided with blower fan, whipping appts and aerating apparatus.
Preferably, in order to dwindle sludge volume and to realize that sludge dewatering reaches the purpose of desliming, described excess sludge treatment system comprises interconnective sludge thickener and sludge dewatering pond.
Preferably, in order to control the flow of mud in Inlet and outlet water and reactor, described water inlet system is connected with the sewage aerobic reaction tank by intake pump, and outlet system is connected with the sewage aerobic reaction tank by going out water pump, and outlet system also carries out the water outlet discharge by pipeline; The mud that goes out to flow of sewage aerobic reaction tank and sludge anaerobic reaction tank enters the excess sludge treatment system by pipeline, aerobic sedimentation mud in the sewage aerobic reaction tank enters the sludge anaerobic reaction tank by the aerobic sludge reflux pump, the anaerobic sludge of sludge anaerobic reaction tank continues reaction by the anaerobic sludge reflux pump from bottom exchange mud to sewage aerobic reaction tank, realize that by aerobic sludge reflux pump and anaerobic sludge reflux pump the circulation exchange of mud between Aerobic-anaerobic two reaction tanks is mobile, thereby play the effect of efficient removal mud; Sludge anaerobic reaction tank mud supernatant liquor enters nitrogen phosphorus treatment system by pipeline, nitrogen phosphorus treatment system continues reaction by pipeline returned sluge dehydration filtrate and settling region supernatant liquor to sewage aerobic reaction tank, nitrogen phosphorus treatment system is also carried out sludge dewatering and is reclaimed the settling region mud that is rich in struvite by pipeline, thereby obtains the high-efficient denitrification and dephosphorization effect.
Preferably, in order to realize automatization control and intelligent management, described water inlet system, sewage aerobic reaction tank, sludge anaerobic reaction tank and outlet system are connected with microelectronics sequential automatic control system respectively.
A kind of sewage water treatment method, comprise the steps:
S1. sewage enters the sewage aerobic reaction tank by water inlet system and intake pump.When the sewage aerobic reaction tank goes out to flow mud mixed liquid introducing sludge anaerobic reaction tank, at first enter sludge anaerobic reaction tank the first lattice---anaerobic main reaction zone, by whipping appts, anaerobic sludge is mixed, guarantee the anaerobism effect of sludge anaerobic reaction tank.Then anaerobic sludge enters sludge anaerobic reaction tank the second lattice---the precipitation switched area, the anaerobic sludge flowed out from the first lattice bottom enters the second lattice and is precipitated, the residence time is more than 60min, mud through the second lattice precipitation exchanges to sewage aerobic reaction tank continuation reaction from the bottom outflow, and start to carry out while intaking from the aerobic reaction pond swap time.When mud enters the sludge anaerobic reaction tank, organic substrates is approach exhaustion, and sludge concentration higher (> 10000mg/L), mud is in complete starvation, to reach the purpose that changes sludge quality, thereby realize the reduction of sludge yield, and further strengthened the anaerobism effect of process sludge anaerobic reation pool by reformative sludge anaerobic reation pool this operation scheme of increase precipitation switched area.Water outlet is by the outlet system that is connected with the sewage aerobic reaction tank and go out water pump and discharged.
S2. the mode that nitrogen phosphorus treatment system generates struvite precipitation by adding alkali and magnesium salts realizes the effect of denitrogenation dephosphorizing simultaneously.Mud supernatant liquor after the screen filtration of sludge anaerobic reaction tank middle and upper part enters nitrogen phosphorus treatment system, and nitrogen phosphorus treatment system is the struvite nitrogen phosphorus treatment system that comprises medicament hybrid reaction district and settling region.At first the mud supernatant liquor enters nitrogen phosphorus treatment system the first lattice---medicament hybrid reaction district, and adding of agent, arranges whipping appts simultaneously and stirred at the sludge anaerobic reaction tank to the pipeline between nitrogen phosphorus treatment system, and medicament is mixed.Then enter nitrogen phosphorus treatment system the second lattice---settling region, the precipitating sludge of settling region is rich in struvite, can be used as phosphate fertilizer and be back to agricultural after independent sludge dewatering, dehydration filtrate and settling region supernatant liquor all are back to the sewage aerobic reaction tank and continue reaction, start to exchange backflow from the sewage aerobic reaction tank aeration period, thereby eliminate the disadvantageous effect of pH relatively high in filtrate to the aerobic reaction pond.
S3. periodically extracting the aerobic sedimentation mud of about 5%-10% in the sewage aerobic reaction tank enters in the sludge anaerobic reaction tank, under anaerobic reacted, and the mud that extracts equivalent sludge anaerobic reaction tank enters in the sewage aerobic reaction tank, realize that by aerobic sludge reflux pump and anaerobic sludge reflux pump the circulation exchange of mud between Aerobic-anaerobic two reaction tanks is mobile, thereby play the effect of efficient removal mud.
S4. the excess sludge in sewage aerobic reaction tank and sludge anaerobic reaction tank is discharged after processing by the excess sludge treatment system.Sludge anaerobic reaction tank top arranges top layer scum silica frost removal device, carries out the processing of sludge anaerobic reaction tank excess sludge after scum silica frost is struck off again, thereby eliminates the impact that the top layer scum silica frost is processed excess sludge; Sludge anaerobic reaction tank precipitation middle and upper part, switched area arranges screen cloth, the mud supernatant liquor after screen filtration is entered to nitrogen phosphorus treatment system from precipitation middle and upper part, switched area, thereby realize that mud-water separation is to reach struvite nitrogen phosphorus treatment effect preferably; The sludge anaerobic reaction tank arranges the back flushing pipeline, utilizes the supernatant liquor periodic reverse after filtering to rinse screen cloth, to keep screen cloth, does not stop up.
Novel sewage treatment unit of the present invention is to improve optimization on the basis of original SBR type OSA technique.Compared with prior art, the present invention has following beneficial effect:
(1) sludge reduction is effective and stable.
Strengthened the anaerobism effect of sludge anaerobic reaction tank by reformative sludge anaerobic reation pool this operation scheme of increase precipitation switched area, the subsequent technique denitrogenation dephosphorizing that is embodied as of mud-water separation provides good reaction conditions, and by regularly carrying out the mud exchange between sludge anaerobic reaction tank and sewage aerobic reaction tank, increased OSA process sludge minimizing usefulness, reduce the process operation expense, the reduce mud secondary pollution.
(2) the nitrogen and phosphorus pollutants removal effect is obvious.
Mud supernatant liquor after the sludge anaerobic reaction tank is processed enters struvite nitrogen phosphorus treatment system, reclaims the rich phosphorous sludge through sludge dewatering simultaneously, and dehydration filtrate and settling region supernatant liquor are back to the sewage aerobic reaction tank and continue reaction.Technique can realize denitrogenation dephosphorizing simultaneously, with the burden that alleviates nitrogen in the sewage aerobic reaction tank and the accumulation of sludge anaerobic reaction tank phosphorus element, improve and improve OSA process system sewage disposal performance, make the quantity discharged of nitrogen and phosphorus pollutants can reach the respective standard of national sewage disposal, and can form and can be back to agriculture rich phosphorous sludge, there is economic benefit and environmental benefit.
(3) automatic intelligent of technique management.
Increase microelectronics sequential automatic control system, by setting the sequential of Inlet and outlet water, aeration agitation, mud exchange etc., thereby can realize automatization control and the intelligent management of technique.
(4) vast potential for future development.
Improvement OSA technique can realize the decrement of excess sludge and the efficient removal of nitrogen and phosphorus pollutants simultaneously, building cost and running cost are low, can effectively improve the present situation of municipal wastewater and mud, its reliability is strong and applied widely, there is long-range economic benefit, environmental benefit and social benefit, demonstrate in actual applications vast potential for future development.
The accompanying drawing explanation
Fig. 1. the utility model waste disposal plant structural representation.
Reference numeral table: 1 water inlet system; 2 sewage aerobic reaction tanks; 3 sludge anaerobic reaction tanks; 4 nitrogen phosphorus treatment systems; 5 outlet systems; 6 excess sludge treatment systems; 7 anaerobic main reaction zones; 8 precipitation switched areas; 9 sludge thickeners; 10 sludge dewatering ponds; 11 intake pumps; 12 aerobic sludge reflux pumps; 13 anaerobic sludge reflux pumps; 14 go out water pump; 15 microelectronics sequential automatic control systems; 16 whipping apptss; 17 aerating apparatuss; 18 blower fans; 19 medicament hybrid reaction districts; 20 settling regions; 21 top layer scum silica frost removal devices; 22, screen cloth; 23 back flushing pipelines; 24 rich phosphorous sludge dehydration ponds.
Fig. 2 the utility model sewage treatment process schematic diagram.
Fig. 3. the utility model OSA technique sequential is set schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is made further and being elaborated, but embodiment does not limit in any form the utility model.
Embodiment 1
The structure of device: a kind of waste disposal plant (with reference to Figure of description 1).Described device comprises water inlet system 1, sewage aerobic reaction tank 2, sludge anaerobic reaction tank 3, nitrogen phosphorus treatment system 4, outlet system 5, excess sludge treatment system 6 and microelectronics sequential automatic control system 15.
Described water inlet system 1 is connected with sewage aerobic reaction tank 2 by intake pump 11, outlet system 5 is connected with sewage aerobic reaction tank 2 by going out water pump 14, sewage aerobic reaction tank 2 enters excess sludge treatment system 6 with the mud that goes out to flow of sludge anaerobic reaction tank 3 by pipeline, aerobic sedimentation mud in sewage aerobic reaction tank 2 enters sludge anaerobic reaction tank 3 by aerobic sludge reflux pump 12, and the anaerobic sludge of sludge anaerobic reaction tank 3 continues reaction by anaerobic sludge reflux pump 13 from bottom exchange mud to sewage aerobic reaction tank 2; The mud supernatant liquor of sludge anaerobic reaction tank 3 enters nitrogen phosphorus treatment system 4 by pipeline, nitrogen phosphorus treatment system 4 continues reaction by pipeline returned sluge dehydration filtrate and settling region supernatant liquor to sewage aerobic reaction tank 2, and nitrogen phosphorus treatment system 4 also carries out by the rich phosphorous sludge pond 24 of dewater the settling region mud that struvite is rich in independent sludge dewatering recovery.
For the anaerobic reaction effect that guarantees the sludge anaerobic reaction tank and the reaction conditions of subsequent technique denitrogenation dephosphorizing, described sludge anaerobic reaction tank 3 comprises anaerobic main reaction zone 7 and precipitation switched area 8; The first lattice are anaerobic main reaction zone 7, whipping appts 16 is set and is stirred, and anaerobic sludge is mixed; The second lattice are for precipitating switched area 8, and the anaerobic sludge flowed out from the first lattice bottom enters the second lattice and precipitated, and the residence time is more than 60min, and the mud precipitated through the second lattice flows out from bottom and exchanges to described sewage aerobic reaction tank 2 continuation reactions.
The impact of excess sludge being processed in order to eliminate the top layer scum silica frost, described sludge anaerobic reaction tank 3 tops arrange top layer scum silica frost removal device 21, carry out the processing of sludge anaerobic reaction tank excess sludge after scum silica frost is struck off again; In order to realize that mud-water separation is to reach struvite nitrogen phosphorus treatment effect preferably, 8 middle and upper parts, precipitation switched area of described sludge anaerobic reaction tank arrange screen cloth 22, and the mud supernatant liquor after screen filtration is entered to described nitrogen phosphorus treatment system 4 from precipitation 8 middle and upper parts, switched area; In order to keep screen cloth 22 not stop up, described sludge anaerobic reaction tank 3 arranges back flushing pipeline 23, utilizes the supernatant liquor periodic reverse after filtering to rinse screen cloth 22.
In order to realize the wastewater efficient Nitrogen/Phosphorus Removal and to reclaim rich phosphorous sludge, described nitrogen phosphorus treatment system 4 is the struvite nitrogen phosphorus treatment system that comprises 19Ji settling region, medicament hybrid reaction district 20, and the mud supernatant liquor after sludge anaerobic reaction tank 3 is processed enters nitrogen phosphorus treatment system 4.Nitrogen phosphorus treatment system 4 first lattice are medicament hybrid reaction district 19, whipping appts 16 is set and is stirred, and medicament is mixed; Second lattice is settling region 20, reclaims the settling region mud that is rich in struvite after independent sludge dewatering is carried out in rich phosphorous sludge dehydration pond 24 simultaneously, and dehydration filtrate and settling region supernatant liquor all are back to described sewage aerobic reaction tank 2 and continue reaction.
In order to regulate sewage aerobic reaction tank aeration rate and to make mud wherein in abundant admixture, described sewage aerobic reaction tank is provided with blower fan 18, whipping appts 16 and aerating apparatus 17.
In order to dwindle sludge volume and to realize that sludge dewatering reaches the purpose of desliming, described excess sludge treatment system 6 comprises sludge thickener 9 and sludge dewatering pond 10.
In order to realize automatization control and the intelligent management of technique, described water inlet system 1, sewage aerobic reaction tank 2, sludge anaerobic reaction tank 3 and outlet system 5 are connected with microelectronics sequential automatic control system 15 respectively.
The device that uses embodiment 1 to build, carry out the sewage water treatment method that can simultaneously realize that excess sludge reduction and nitrogen phosphorus efficiency are removed, and treatment scheme is shown in Fig. 2.Concrete grammar is as follows:
(1) sewage enters sewage aerobic reaction tank 2 by water inlet system 1 and intake pump 11, by blower fan 18 and aerating apparatus 17, regulates aeration rate, by whipping appts 16, makes the anti-interior mud of sewage aerobic reaction tank 2 in abundant admixture.
(2) sewage aerobic reaction tank 2 goes out to flow in mud mixed liquid introducing sludge anaerobic reaction tank 3, at first enter sludge anaerobic reaction tank the first lattice---anaerobic main reaction zone 7, then enter sludge anaerobic reaction tank the second lattice---precipitation switched area 8, mud through the second lattice precipitation exchanges to the 2 continuation reactions of sewage aerobic reaction tank from the bottom outflow, by the reformative sludge anaerobic reation pool, also increases and precipitates the anaerobism effect that this operation scheme of switched area has further been strengthened the process sludge anaerobic reation pool.Sludge anaerobic reaction tank 3 arranges top layer scum silica frost removal device 21, screen cloth 22 and back flushing pipeline 23.
(3) the mud supernatant liquor after the screen cloth 22 of sludge anaerobic reaction tank 3 middle and upper parts filters enters nitrogen phosphorus treatment system 4 and carries out the denitrogenation dephosphorizing processing.At first the mud supernatant liquor enters nitrogen phosphorus treatment system 4 first lattice---medicament hybrid reaction district 19, and adding of agent, stirs medicament is mixed by whipping appts 16 at sludge anaerobic reaction tank 3 to the pipeline between nitrogen phosphorus treatment system 4.Then enter nitrogen phosphorus treatment system 4 second lattice---settling region 20, precipitating sludge can be used as phosphate fertilizer and is back to agricultural after independent sludge dewatering is carried out in rich phosphorous sludge dehydration pond 24, and dehydration filtrate and settling region supernatant liquor all are back to sewage aerobic reaction tank 2 and continue reaction.
(4) periodically extracting the aerobic sedimentation mud of about 5%-10% in sewage aerobic reaction tank 2 enters in sludge anaerobic reaction tank 3, under anaerobic reacted, and the mud of extracting equivalent sludge anaerobic reaction tank 3 out enters in sewage aerobic reaction tank 2, realize that the circulation exchange of mud between Aerobic-anaerobic two reaction tanks is mobile, the mud exchange of two reaction tanks completes by aerobic sludge reflux pump 12 and anaerobic sludge reflux pump 13.
(5) sewage aerobic reaction tank 2 enters excess sludge treatment system 6 with the excess sludge in sludge anaerobic reaction tank 3, by sludge thickener 9 and sludge dewatering pond 10, is processed rear discharge; Water outlet is by the outlet system 5 that is connected with sewage aerobic reaction tank 2 and go out water pump 14 and discharged.
(6) Modified SBR-OSA process system, under the condition at identical sequential setting and same artificial sewage water source, adopts 24 hours continuous dynamic operation methods, and system water inlet, quiet heavy, water outlet, mud exchange circulate 4 cycles every day, and each cycle of operation is 6 h.Per cycle flooding time is 50 min, flooding quantity 1250 mL, flow 25 mL/min.The every cover process system total amount of intaking every day is 5 L.Per cycle water discharging time is 10 min, aquifer yield 1250 mL, flow 125 mL/min.The synchronous operation simultaneously of every cover system, thus realize the whole-course automation operation (see figure 3) of water inlet, water outlet, aeration agitation, quiet heavy, idle and mud exchange.
Further illustrate the implementation result of the inventive method by practical application technique.
(1) reduction
Adopt the described apparatus and method of the embodiment of the present invention to be processed, the apparent mud production rate 0.288KG-MLSS/KG-COD of former technique, drop to 0.151KG-MLSS/KG-COD after adding New O SA technique, obtains 48% reduction; And consider that the former technique of the rear calculating of water outlet SS accumulative total gained and the actual mud production rate of New O SA technique are respectively 0.336 and 0.211 KG-MLSS/KG-COD, have obtained 38% reduction.The reduction calculated under two kinds of conditions all illustrates that obvious reduction has occurred the technique based on the inventive method.
(2) nitrogen phosphorus removal effect
After adopting device of the present invention and technique, the water outlet ammonia nitrogen concentration is on average in the 1mg/L left and right, and system reaches the clearance more than 94% to ammonia nitrogen, and the effluent quality of ammonia nitrogen can reach " urban wastewater treatment firm pollutant emission standard " one-level A standard fully.During process operation, the average influent concentration of TN is 22.89mg/L, and it is 12.86mg/L that TN on average goes out water concentration, and technique all remains on 50% left and right to the clearance of TN, meets " urban wastewater treatment firm pollutant emission standard " one-level A standard.
During process operation, the average influent concentration of TP reaches 2.9mg/L, in New O SA reactor, mud supernatant liquor TP concentration is substantially in the 60mg/L left and right, and the excess sludge supernatant liquor TP of discharge, in the 1.5mg/L left and right, meets " urban wastewater treatment firm pollutant emission standard " primary standard.
Claims (7)
1. a waste disposal plant, is characterized in that, comprises water inlet system, sewage aerobic reaction tank, sludge anaerobic reaction tank, nitrogen phosphorus treatment system, outlet system, excess sludge treatment system;
Water inlet system is connected with the sewage aerobic reaction tank, and the sewage aerobic reaction tank is connected with sludge anaerobic reaction tank, excess sludge treatment system and outlet system, and the sludge anaerobic reaction tank is connected with nitrogen phosphorus treatment system and excess sludge treatment system;
Described sludge anaerobic reaction tank comprises anaerobic main reaction zone and precipitation switched area; Described nitrogen phosphorus treatment system is the struvite nitrogen phosphorus treatment system that comprises medicament hybrid reaction district and settling region.
2. waste disposal plant according to claim 1, is characterized in that, described sludge anaerobic reaction tank is divided into two lattice, and the first lattice are the anaerobic main reaction zone, and the anaerobic main reaction zone is provided with whipping appts; The second lattice are the precipitation switched area, and described sludge anaerobic reaction tank arranges top layer scum silica frost removal device, screen cloth and back flushing pipeline.
3. waste disposal plant according to claim 1, is characterized in that, described struvite nitrogen phosphorus treatment system is divided into two lattice, and first lattice are medicament hybrid reaction district, and medicament hybrid reaction district is provided with whipping appts, and second lattice is settling region.
4. waste disposal plant according to claim 1, is characterized in that, described sewage aerobic reaction tank is provided with blower fan, whipping appts and aerating apparatus.
5. waste disposal plant according to claim 1, is characterized in that, described excess sludge treatment system comprises interconnective sludge thickener and sludge dewatering pond.
6. waste disposal plant according to claim 1, it is characterized in that, described water inlet system is connected with the sewage aerobic reaction tank by intake pump, outlet system is connected with the sewage aerobic reaction tank by going out water pump, outlet system also carries out the water outlet discharge by pipeline, the mud that goes out to flow of sewage aerobic reaction tank and sludge anaerobic reaction tank enters the excess sludge treatment system by pipeline, the sewage aerobic reaction tank is connected with the sludge anaerobic reaction tank by the aerobic sludge reflux pump, the sludge anaerobic reaction tank exchanges mud to the sewage aerobic reaction tank from bottom by the anaerobic sludge reflux pump, sludge anaerobic reaction tank mud supernatant liquor enters nitrogen phosphorus treatment system by pipeline, nitrogen phosphorus treatment system by pipeline returned sluge dehydration filtrate and settling region supernatant liquor to the sewage aerobic reaction tank, nitrogen phosphorus treatment system is also carried out sludge dewatering and is reclaimed the settling region mud that is rich in struvite by pipeline.
7. waste disposal plant according to claim 1, is characterized in that, described water inlet system, sewage aerobic reaction tank, sludge anaerobic reaction tank and outlet system are connected with microelectronics sequential automatic control system respectively.
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| CN103387311A (en) * | 2013-07-02 | 2013-11-13 | 中山大学 | Sewage treatment unit and method thereof |
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