CN103523908B - Synchronous high-efficiency biological phosphorus removing and reclaiming system and method based on activated sludge process - Google Patents
Synchronous high-efficiency biological phosphorus removing and reclaiming system and method based on activated sludge process Download PDFInfo
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- CN103523908B CN103523908B CN201310511536.5A CN201310511536A CN103523908B CN 103523908 B CN103523908 B CN 103523908B CN 201310511536 A CN201310511536 A CN 201310511536A CN 103523908 B CN103523908 B CN 103523908B
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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
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a synchronous high-efficiency biological phosphorus removing and reclaiming method based on an activated sludge process. The system comprises an aeration tank and a sedimentation tank, which are communicated with an intake pipeline, wherein an aeration device is arranged in the aeration tank; the aeration tank is communicated with the sedimentation tank through the sewage pipeline; an effluent drainage pipeline for discharging supernate is arranged on the sedimentation tank. The system is characterized in that an unused reflux sludge storage drum, a sewage-sludge mixing drum, a primary sedimentation device, a phosphorus reclaiming reaction drum and a secondary sedimentation device are sequentially communicated with the bottom of the sedimentation tank. Compared with the prior art, the treatment system and method provided by the invention aim to overcome the defect of an existing activated sludge biological phosphorus removal system, are used for reclaiming phosphorus while an activated sludge system synchronously removes phosphorus with high efficiency on the basis of single-stage aerobic biological phosphorus removal, and are capable of effectively enriching phosphorus accumulation microorganisms. Working in a continuous flow mode, the system is small in investment, stable in effluent quality and high in phosphorus reclaiming quantity, can be used for lowering the effluent phosphorus concentration of an existing activated sludge system effectively and reclaiming precious phosphorus resources, and is suitable for transformation of a traditional activated sludge process.
Description
Technical field
The present invention relates to field of waste water treatment, specifically refer to that a kind of activated sludge process synchronously realizes high-performance bio dephosphorization and phosphorus recovery method.
Background technology
Phosphorus is biological necessary nutritive element, but in water body, phosphorus element content is too high, can cause the eutrophication of water body.Eutrophication causes water quality deterioration, adds to the difficulties to drinking water treatment; Cause dissolved oxygen concentration in water body to reduce because algae covers the water surface, hydrobiont meeting anoxia asphyxia is lethal, and the culture fishery underproduction even destroys; Due to water body band frowst, therefore lose swimming value and the ornamental value of water body; Have influence on domestic water.Also cause water quality can not meet the water quality requirement of industrial colling and process water simultaneously, even cause cooling infrastructure to block and lost efficacy, have influence on work, agricultural production water.
In water body, an important sources of phosphorus is the phosphorus-containing wastewater of discharging in sewage work.Therefore, in phosphorus-containing wastewater, the removal of phosphorus is the large study hotspot of sewage treatment area one.
On the other hand, phosphorus is nonupdatable precious resources.Tellurian phosphoric acid salt mineral products resource-constrained, all in decline in quality and mineability, has verified minable phosphate ore by the exploitation of present coefficient of mining, has estimated to continue exploitation less than 100 years.Along with the sustainable growth of population, particularly desert, soil, to the consumption containing phosphatization fertilizer by growing.Therefore, from sewage, the important topic that phosphorus is also sewage recycling how is reclaimed efficiently.
In existing sewage disposal technology, multiple research is had to the removal of phosphorus, such as publication number is " a kind of sequence batch (reduction high-concentration waste water nitrogen disclosed in the Chinese invention patent application of CN101040499A, phosphorus, the method of COD pollution load ", notification number is " sludge internal carbon source original position develop and uses strengthening sewage denitrification and dephosphorization System and method for " disclosed in the Chinese invention patent application of CN102557360A, notification number is " a kind of biological coupling denitrogenation dephosphorizing sewage purification regeneration treating method and the system " disclosed in the Chinese invention patent application of CN102153247A, these patent applications disclose different biological phosphate-eliminating methods, but to be through the water quality after dephosphorization be up to standard, and the phosphorus of absorption can only discharge, and has not only increased the weight of the waste of phosphor resource, also cause the pollution of other environment simultaneously to a certain extent.
Activated sludge process due to its operational management convenient, the advantage such as reliable and stable, is widely used.But traditional activated sludge process, owing to not having the alternate run environment of aerobic/anaerobic, enrichment can not gather phosphorus microorganism effectively.Therefore, one of traditional activated sludge process larger shortcoming is that sewage can not realize efficient biological phosphate-eliminating.This makes phosphorus content in water outlet higher on the one hand, pollutes natural water body; Cause a large amount of phosphor resource wastes in sewage on the other hand.
Summary of the invention
Technical problem to be solved by this invention provides a kind of activated sludge process synchronously can realize high-performance bio dephosphorization and phosphorus recovery system for the present situation of prior art.
Another technical problem to be solved by this invention is to provide a kind of method that synchronously can realize high-performance bio dephosphorization and phosphorus recovery.
The present invention solves the problems of the technologies described above adopted technical scheme: this synchronously realizes high-performance bio dephosphorization and phosphorus recovery system, comprise the aeration tank and settling tank that are connected with inlet channel, aerating apparatus is provided with in described aeration tank, described aeration tank is communicated with described settling tank by sewer line, and described settling tank is provided with Chinese effluent pipeline; It is characterized in that:
The bottom of described settling tank is communicated with returned sluge by shore pipe and leaves unused bucket, and described returned sluge leaves unused in bucket and is provided with whipping appts;
Described returned sluge leaves unused the relief outlet of bucket by pipeline communication sewage sludge tempering tank, is provided with whipping appts in described sewage sludge tempering tank, and the water-in of described sewage sludge tempering tank be communicated with by branch sewer described in inlet channel;
The discharge outlet of described sewage sludge tempering tank connects one-level settler by pipeline, and the mud discharging mouth of the bottom of described one-level settler connects described inlet channel by pipeline, and the water port of described one-level settler connects phosphorus by pipeline and reclaims reaction container;
Described phosphorus reclaims in reaction container and is provided with whipping appts;
Described phosphorus reclaims the relief outlet of reaction container by pipeline communication two-stage precipitation device, the bottom of described two-stage precipitation device is provided with the discharge line for discharging calcium phosphate precipitation be connected with upstream device, the inlet channel described in the outfall of described two-stage precipitation device is connected by pipeline.
Use above-mentioned high-performance bio dephosphorization and the phosphorus recovery system of synchronously realizing synchronously to realize the method that high-performance bio dephosphorization and phosphorus reclaims, it is characterized in that comprising the steps:
(1), sewage entered in described aeration tank by described inlet channel, starts described aerating apparatus and carries out aeration to aeration tank, and controlling DO concentration in aeration tank is 2-4mgL
-1, the residence time of sewage in aeration tank is 240-300min;
(2), after mud mixture flows out from described aeration tank, entering described settling tank, is 50-70min in the residence time of described settling tank;
(3), after precipitation terminates, supernatant liquid is discharged by described Chinese effluent pipeline, and the mud of settling tank lower floor is divided into two strands after discharging; Recovery system is discharged for first strand that wherein accounts for sludge volume total amount 8%-12% as excess sludge; Account for second strand of sludge volume total amount 88%-92% to enter described returned sluge as returned sluge and to leave unused bucket, residence time 5-7h, the stir speed (S.S.) of whipping appts is 120-140rpm;
(4), returned sluge enters described sewage sludge tempering tank, simultaneously from introducing the sewage accounting for sewage total flux 16%-20% in described inlet channel in described sewage sludge tempering tank, under the rotating speed of 120-140rpm stirs, sewage is fully mixed with mud, the residence time is 1-2h;
(5), from the mud mixture of sewage sludge tempering tank discharge enter described one-level settler, described one-level settler is advection type precipitating device, carries out effective separation of mud mixture in one-level settler, and the residence time is 1-2h; The extremely low sludge reflux of the phosphorus content obtained after precipitation is to front end, aeration tank, and the aqueous phase that phosphorus content is higher enters described phosphorus and reclaims reaction container;
(6), in described phosphorus recovery reaction container, Fe is added
2(SO
4)
3with CaCl
2, make Fe in reaction container
2(SO
4)
3concentration be 30-50mgL
-1, CaCl
2concentration be 60-80mgL
-1; Mixing speed is 120-140rpm, and the reaction times is 20-30min;
(7) mud mixture that, phosphorus recovery reaction container is discharged enters two-stage precipitation device, described two-stage precipitation device is advection type precipitating device, the residence time is 1-2h, carry out effective separation of mud, water, the phosphoric acid salt wherein precipitated is discharged from bottom and is reclaimed, and the aqueous-phase reflux obtained after precipitation is to front end, aeration tank.
Compared with prior art, the present invention is directed to the deficiency of existing Models for Biological Phosphorus Removal in Activated Sludge Process system, on the basis of single-stage aerobic biological dephosphorization, a kind for the treatment of system and method for while the dephosphorization of Sludge System synchronous high-efficiency, carrying out phosphorus recovery are proposed, effectively enrichment can gather phosphorus microorganism, Continuous Flow mode is adopted to run, this system investments is few, stable effluent quality, phosphorus yield are high, effectively can reduce the water outlet phosphorus concentration of existing Sludge System, and reclaim valuable phosphor resource, be suitable for the transformation of conventional activated sludge process.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
1-aeration tank, 2-aerating apparatus, 3-air compressor, 4-settling tank, 5-returned sluge leaves unused bucket, 6-sewage sludge tempering tank, 7-one-level settler, 8-phosphorus reclaims reaction container, 9-two-stage precipitation device, 10-branch sewer, 11-inlet channel, 12-discharge line, 13-sludge pipe.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in Figure 1, this synchronously realizes high-performance bio dephosphorization and phosphorus recovery system comprises: the aeration tank 1 be connected with inlet channel and settling tank 4, and be provided with aerating apparatus 2 in described aeration tank 1, this aerating apparatus electrically connects air compressor 3; Aeration tank is communicated with settling tank 4 by sewer line, and described settling tank is provided with the Chinese effluent pipeline for discharging supernatant liquor;
The bucket of described settling tank 4 is communicated with returned sluge by discharge tube and leaves unused bucket 5, and returned sluge leaves unused in bucket and is provided with whipping appts;
Returned sluge leaves unused the relief outlet of bucket 5 by pipeline communication sewage sludge tempering tank 6, be provided with whipping appts, and the water-in of sewage sludge tempering tank is communicated with described inlet channel 11 by branch sewer 10 in sewage sludge tempering tank;
The discharge outlet of sewage sludge tempering tank 6 connects one-level settler 7 by pipeline, and the mud discharging mouth of the bottom of one-level settler is back to aeration tank 1 by sludge pipe 13, and the water port of one-level settler connects phosphorus by pipeline and reclaims reaction container 8;
Phosphorus reclaims in reaction container 8 and is provided with whipping appts;
Phosphorus reclaims the relief outlet of reaction container by pipeline communication two-stage precipitation device 9, the bottom of described two-stage precipitation device is provided with the discharge line 12 for discharging calcium phosphate precipitation be connected with upstream device, and the outfall of described two-stage precipitation device connects inlet channel 11 by pipeline.
The present embodiment is the process experiment of laboratory simulation sewage.Wherein in sewage, carbon source mainly adopts sodium acetate, and with ammonia nitrogen in ammonium chloride simulated sewage, with soluble phosphate in potassium primary phosphate simulated sewage, influent COD is 250 ~ 280mgL
-1, TN is 30 ~ 34mgL
-1, TP is 10 ~ 12mgL
-1.Above-mentioned sewage is synchronously realized to the method for high-performance bio dephosphorization and phosphorus recovery, comprise the steps:
(1), sewage entered in described aeration tank by described inlet channel, starts described aerating apparatus and carries out aeration to aeration tank, and controlling DO concentration in aeration tank is 3mgL
-1, the residence time of sewage in aeration tank is 270min;
(2), after mud mixture flows out from described aeration tank, entering described settling tank, is 60min in the residence time of described settling tank;
(3), after precipitation terminates, supernatant liquid is discharged by described Chinese effluent pipeline, and the mud of settling tank lower floor is divided into two strands after discharging; Recovery system is discharged for first strand that wherein accounts for sludge volume total amount 10% as excess sludge; Account for second strand of sludge volume total amount 90% to enter described returned sluge as returned sluge and to leave unused bucket, residence time 6h, the stir speed (S.S.) of whipping appts is 130rpm;
(4), returned sluge enters described sewage sludge tempering tank, simultaneously from introducing the sewage accounting for sewage total flux 18% in described inlet channel in described sewage sludge tempering tank, under 130rpm stirs, sewage is fully mixed with mud, the residence time is 1.5h;
(5), from the mud mixture of sewage sludge tempering tank discharge enter described one-level settler, described one-level settler is advection type precipitating device, carries out effective separation of mud mixture in one-level settler, and the residence time is 1.5h; The extremely low sludge reflux of the phosphorus content obtained after precipitation is to front end, aeration tank, and the aqueous phase that phosphorus content is higher enters described phosphorus and reclaims reaction container;
(6), in described phosphorus recovery reaction container, Fe is added
2(SO
4)
3with CaCl
2, make Fe in reaction container
2(SO
4)
3concentration be 40mgL
-1, CaCl
2concentration be 70mgL
-1; Mixing speed is 130rpm, and the reaction times is 25min;
(7) mud mixture that, phosphorus recovery reaction container is discharged enters two-stage precipitation device, described two-stage precipitation device is advection type precipitating device, the residence time is 1.5h, carry out effective separation of mud, water, the phosphoric acid salt wherein precipitated is discharged from bottom and is reclaimed, and the aqueous-phase reflux obtained after precipitation is to front end, aeration tank.
After steady running, result is as follows: water outlet COD is 29 ~ 32mgL
-1, TN is 9.6 ~ 10.8mgL
-1, TP is 0 ~ 0.24mgL
-1, COD, TN, TP clearance reaches 91.2 ± 3.1%, 67.2 ± 4.2%, 97.8 ± 1.5% respectively, and phosphorous recovery reaches 88.5 ± 1.8%.
Adopt aforesaid method process community life sewage.
Before process, in sewage, COD is 178 ~ 342mgL
-1, ammonia nitrogen is 27.8 ~ 40.3mgL
-1, TN is 32.6 ~ 48.9mgL
-1, TP is 4.1 ~ 7.2mgL
-1.
After adopting aforesaid method process, after running, result is: water outlet COD is 16 ~ 24mgL
-1, ammonia nitrogen is stabilized in 0.2 ~ 0.4mgL
-1, TN is 8.6 ~ 11.3mgL
-1, TP is 0.04 ~ 0.22mgL
-1, COD, ammonia nitrogen, TN and TP clearance reach 89.6 ± 3.9%, 97.0 ± 2.1%, 65.8 ± 4.9%, 97.1 ± 2.3% respectively, and phosphorous recovery reaches 87.3 ± 2.8%.
Claims (1)
1. an activated sludge process synchronously realizes high-performance bio dephosphorization and phosphorus recovery method, it is characterized in that used activated sludge process synchronously realizes high-performance bio dephosphorization and phosphorus recovery system comprises the aeration tank be connected with inlet channel, aerating apparatus is provided with in described aeration tank, described aeration tank is communicated with settling tank by sewer line, and described settling tank is provided with the Chinese effluent pipeline for discharging supernatant liquor;
To be left unused bucket by spoil disposal pipeline communication returned sluge in the bottom of described settling tank, described returned sluge leaves unused in bucket and is provided with whipping appts;
Described returned sluge leaves unused the relief outlet of bucket by pipeline communication sewage sludge tempering tank, is provided with whipping appts in described sewage sludge tempering tank, and the water-in of described sewage sludge tempering tank be communicated with by branch sewer described in inlet channel;
The mud discharging mouth of described sewage sludge tempering tank connects one-level settler by pipeline, and the mud discharging mouth of the bottom of described one-level settler connects described inlet channel by pipeline, and the water port of described one-level settler connects phosphorus by pipeline and reclaims reaction container;
Described phosphorus reclaims in reaction container and is provided with whipping appts;
Described phosphorus reclaims the relief outlet of reaction container by pipeline communication two-stage precipitation device, the bottom of described two-stage precipitation device is provided with the discharge line for discharging calcium phosphate precipitation be connected with upstream device, the inlet channel described in the outfall of described two-stage precipitation device is connected by pipeline;
The method that synchronous high-efficiency biological phosphate-eliminating and phosphorus reclaim comprises the steps:
(1), sewage entered in described aeration tank by described inlet channel, starts described aerating apparatus and carries out aeration to aeration tank, and controlling DO concentration in aeration tank is 2-4mgL
-1, the residence time of sewage in aeration tank is 240-300min;
(2), after mud mixture flows out from described aeration tank, entering described settling tank, is 50-70min in the residence time of described settling tank;
(3), after precipitation terminates, supernatant liquid is discharged by described Chinese effluent pipeline, and the mud of settling tank lower floor is divided into two strands after discharging; Recovery system is discharged for first strand that wherein accounts for sludge volume total amount 8%-12% as excess sludge; Account for second strand of sludge volume total amount 88%-92% to enter described returned sluge as returned sluge and to leave unused bucket, residence time 5-7h, the stir speed (S.S.) of whipping appts is 120-140rpm;
(4), returned sluge enters described sewage sludge tempering tank, simultaneously from introducing the sewage accounting for sewage total flux 16%-20% in described inlet channel in described sewage sludge tempering tank, under 120-140rpm stirs, sewage is fully mixed with mud, the residence time is 1-2h;
(5), from the mud mixture of sewage sludge tempering tank discharge enter described one-level settler, described one-level settler is advection type precipitating device, carries out effective separation of mud mixture in one-level settler, and the residence time is 1-2h; The extremely low sludge reflux of the phosphorus content obtained after precipitation is to front end, aeration tank, and the aqueous phase that phosphorus content is higher enters described phosphorus and reclaims reaction container;
(6), in described phosphorus recovery reaction container, Fe is added
2(SO
4)
3with CaCl
2, make Fe in reaction container
2(SO
4)
3concentration be 30-50mgL
-1, CaCl
2concentration be 60-80mgL
-1; Mixing speed is 120-140rpm, and the reaction times is 20-30min;
(7) mud mixture that, phosphorus recovery reaction container is discharged enters two-stage precipitation device, described two-stage precipitation device is advection type precipitating device, stop 1-2h, carry out effective separation of mud, water, the phosphoric acid salt wherein precipitated is discharged from bottom and is reclaimed, and the aqueous-phase reflux obtained after precipitation is to front end, aeration tank.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103864204B (en) * | 2014-03-21 | 2015-05-20 | 北京工业大学 | Intermittent biological enhancement device and method for phosphorous removal and recovery |
| CN111908664B (en) * | 2020-08-26 | 2023-11-24 | 济南金宇公路产业发展有限公司 | Static lake water ecological restoration system and working method |
| CN114605050A (en) * | 2022-04-18 | 2022-06-10 | 哈尔滨工业大学 | Sewage sludge combined treatment system and method based on biological predation synchronous sludge reduction and phosphorus recovery |
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| JP2002143883A (en) * | 2000-11-09 | 2002-05-21 | Ebara Corp | Method for treating organic polluted water containing phosphorus |
| CN101381184A (en) * | 2008-06-06 | 2009-03-11 | 北京桑德环保集团有限公司 | Sewage disposal system with biological phosphorus removal and chemical phosphorus removal bypass and disposal method |
| CN101544453A (en) * | 2009-05-07 | 2009-09-30 | 重庆大学 | Dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and method thereof |
-
2013
- 2013-10-24 CN CN201310511536.5A patent/CN103523908B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| JPH081187A (en) * | 1994-06-22 | 1996-01-09 | Konoike Constr Ltd | Treatment of sewage |
| JP2002143883A (en) * | 2000-11-09 | 2002-05-21 | Ebara Corp | Method for treating organic polluted water containing phosphorus |
| CN101381184A (en) * | 2008-06-06 | 2009-03-11 | 北京桑德环保集团有限公司 | Sewage disposal system with biological phosphorus removal and chemical phosphorus removal bypass and disposal method |
| CN101544453A (en) * | 2009-05-07 | 2009-09-30 | 重庆大学 | Dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and method thereof |
Non-Patent Citations (2)
| Title |
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| 丁强.生物化学协同除磷及旁路磷回收工艺研究.《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑(月刊)》.2011, * |
| 王冬波.SBR单级好氧生物除磷机理研究.《中国博士学位论文全文数据库工程科技Ⅰ辑(月刊)》.2012, * |
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Inventor after: Yang Guojing Inventor after: Wang Dongbo Inventor after: Li Xiaoming Inventor after: Luo Weinan Inventor after: Sha Haolei Inventor after: Yang Qi Inventor after: Lu Chen Inventor before: Yang Guojing Inventor before: Wang Dongbo Inventor before: Li Xiaoming Inventor before: Luo Weinan Inventor before: Sha Haolei Inventor before: Yang Qi |
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