CN204897679U - Surplus activated sludge resourceful treatment system - Google Patents
Surplus activated sludge resourceful treatment system Download PDFInfo
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- CN204897679U CN204897679U CN201520601615.XU CN201520601615U CN204897679U CN 204897679 U CN204897679 U CN 204897679U CN 201520601615 U CN201520601615 U CN 201520601615U CN 204897679 U CN204897679 U CN 204897679U
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Abstract
The utility model provides a surplus activated sludge resourceful treatment system, it includes one sinks the aeration stirring of the surplus activated sludge exit linkage in ponds through sludge inlet and sewage treatment system no. 2 stores the mud sump, one stirs the MAP precipitation device that the delivery port of storing the mud sump is connected with the aeration, and the MAP precipitation separation recovery unit of setting below the sediment exit position of MAP precipitation device, in the mud sump was store in aeration stirring, its agitating unit's stirring leaf be the rectangle, has 4, is separated by 90 between the adjacent stirring leaf, and poroid baffle is installed to its aeration equipment setting on agitating unit, below the delivery port below agitating unit. The utility model discloses simple structure, easily operation, treatment cost is low, and emission reduction effect is showing.
Description
Technical field
The utility model relates to a kind of sewage treatment plant residual active sludge recycling treatment system, belongs to residual active sludge process and resource technology field.Mud, by after native system process, both can reclaim phosphorus nitrogen resource improve effects, be beneficial to again the minimizing process of follow-up mud from mud, was a kind of economical and practical residual active sludge treatment system.
Background technology
Whole nation urban wastewater treatment firm day sewage treatment capacity reaches 1.22 billion cubic meters, the sewage work of about 86.2% adopts activated sludge process, the residual active sludge produced in treating processes belongs to secondary pollutant, its volume ratio accounts for 0.3% ~ 0.5% of sewage disposal total amount, and its process disposal costs accounts for more than the 40%-60% of sewage disposal running cost usually.The processing mode that present stage generally adopts is based on refuse tip landfill stabilization or in Sewage Plant original position Anaerobic Digestion.In anaerobic process, create nitrogen, Phosphorus pollutent, be discharged into Sewage treatment systems again, thus cause Sewage Plant load to increase, affect effluent quality, become the insoluble problem of residual active sludge anaerobic treatment.
At present conventional method for sludge treatment has the method adding acid, alkali or ozone.Conventional acid, alkaloid substance are HCI and NaOH solution respectively, the two all can promote that mud melts born of the same parents and discharges phosphorus nitrogen effectively, have good effect to sludge reduction, but the treatment solution colourity of acid, alkali is all very heavy, such as after 5%NaOH lignin-sludge, supernatant liquor presents chocolate; 10%HCI treatment solution presents isabelline, and containing a large amount of CI in acid treatment supernatant liquor
-ion.So acid-alkali treatment method introduces new pollution substance all in the processing system.And By Ozone is mainly used in waste water tertiary treatment at present, and the equipment of By Ozone is disposable has high input, and treating processes energy consumption is high, therefore can increase considerably processing cost.
Summary of the invention
The purpose of this utility model is that provide a kind of residual active sludge recycling treatment system, this system architecture is simple, easy handling, processing cost is low, and emission reduction effect is remarkable for current Sewage Plant residual active sludge not by the defect of recycling.
A kind of residual active sludge recycling treatment system that the utility model provides, it comprises one and exports by mud import and the residual active sludge of Sewage treatment systems second pond the MAP precipitin reaction device that the aeration agitation mud storage pool, that is connected is connected with the water outlet of aeration agitation mud storage pool, and the MAP precipitate and separate retrieving arrangement below a precipitation outlet position being arranged on MAP precipitin reaction device; In aeration agitation mud storage pool, the paddle of its whipping appts is rectangle, has 4, and be separated by 90 ° between adjacent paddle, its aerating apparatus is arranged on below whipping appts, and above whipping appts, under water outlet, 15cm place is provided with poroid baffle plate.
In above-mentioned, MAP precipitin reaction device is provided with agitator.
In above-mentioned, MAP precipitin reaction device is provided with and adds microcosmic salt pipe and add magnesium salts pipe.
In above-mentioned, MAP precipitin reaction device is provided with water shoot.
In above-mentioned, the precipitation outlet of MAP precipitin reaction device is provided with valve.
In above-mentioned, bottom aeration agitation mud storage pool, mud mouth is had to connect sludge dehydration device.
In above-mentioned, the diameter in the hole in poroid baffle plate is 1.5-2cm.
Make mud melt born of the same parents to discharge phosphorus nitrogen by arranging aerating apparatus, whipping appts and poroid baffle plate in aeration agitation mud storage pool, compared with existing acid, alkaline purification method, do not add the chemical pollutant that acid, alkali etc. are new, and mud release phosphorus nitrogen maximum concentration is all higher than the maximum release concentration in acid, alkaline purification liquid.
At MAP precipitin reaction device, MAP precipitation is carried out to the water outlet of aeration agitation mud storage pool, add 5%Na
3pO
4solution and 17%MgCl
2solution, P/Mg/N mol ratio is made to be 1/1.2/1, reacting solution pH value 9.0 is regulated with 5MNaOH, stir when adding medicament, alr mode is after 800rpm stirs 5 minutes, reduce to 200rpm stirs 15 minutes, stop stirring postprecipitation 3h, in supernatant liquor, the rate of recovery of ammonia nitrogen is 91%, and the rate of recovery of dissolved phosphorus is 94.1%.Carry out Separation and Recovery to the precipitation Chinese patent 201420458242.0 " a kind of device phosphorus in waste water nitrogen being carried out to the recovery of struvite resource utilization " generated to utilize as slow-release fertilizer.Phosphorus nitrogen resource reclaim in residual active sludge reduces sludge treatment cost greatly, is conducive to reducing phosphorus nitrogen load concentration in follow-up sludge treatment simultaneously.
The utility model is when applying, by to Sewage Plant mud storage pool (or sludge thickener) structure of modification, bottom sludge sump, aerating apparatus is set, whipping appts is being filled on aerating apparatus 1.5m place pool wall, above whipping appts, 1.8m place sets up poroid baffle plate, bore dia is at 1.5-2cm, such mud is subject to the power effect of aeration agitation machinery at precipitation concentration simultaneously to be made mud melt born of the same parents to discharge phosphorus nitrogen, then to supernatant liquor chemical precipitation method, nitrogen phosphorus is generated MAP precipitation to reclaim as slow-release fertilizer, realize the target of sludge treatment resource utilization minimizing.Aeration agitation is mode conventional in wastewater treatment, be not also used at present mud granule crack and phosphorus nitrogen Element release Research And Engineering practice in.By sewage work's mud storage pool (or sludge thickener) after aforesaid way transformation, under the shear action that aerating apparatus is formed, mud granule Contact probability of collision and squeeze is increased by the particular design of whipping appts and poroid baffle plate, make the stripping of mud extracellular polymeric, mud cytoclasis, discharge intracellular organic matter as protein, polysaccharide and nitrogen phosphorus etc.Be 130h as aeration rate 3L/L min, at aeration time, dissolved phosphorus, nitrogen maximum concentration that mud melts born of the same parents' release can reach 105.4-129.6mg/L and 133.4-173.2mg/L respectively, higher than the maximum release concentration 109.0-143.4mg/L of ammonia nitrogen in the acid under same treatment time muddy water volume ratio the same terms, alkaline purification method, close with the release concentration 116.47-125.15mg/L of dissolved phosphorus.Improved mud storage pool (or sludge thickener) supernatant liquor enters Chinese patent 201420458242.0 " a kind of device phosphorus in waste water nitrogen being carried out to the recovery of struvite resource utilization " again, dissolved phosphorus nitrogen in supernatant liquor is reclaimed, the MAP of generation is precipitated and recycles as slow-release fertilizer.In last sludge sump, mud is disposed after entering pressure filter squeezing further.Compared with other treatment systems, the utility model method is simple, it is easy to operate, do not introduce new chemical substance, particularly with acid, alkaline purification liquid phase ratio, the treatment solution of air of exposing to the sun is close with raw waste water color to be conducive to follow-uply processing further mud, phosphorus nitrogen resource reclaim generates slow-release fertilizer can reduce running cost, mud removes the viscosity after nitrogen phosphorus in this device and reduces, easy squeezing, after squeezing, after the squeezing of volume ratio ordinary activated sludge, volume reduces about 30%, reach sludge reduction and stabilization effect, belong to a kind of clean system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the paddle of whipping appts of the present utility model lays schematic diagram.
Fig. 3 is the structural representation of poroid baffle plate of the present utility model.
Embodiment
Referring to figs. 1 through Fig. 3, a kind of residual active sludge recycling treatment system that the utility model provides, it comprises one and exports by mud import 18 and the residual active sludge of Sewage treatment systems second pond the MAP precipitin reaction device 8 that the aeration agitation mud storage pool 1, that is connected is connected with the water outlet 3 of aeration agitation mud storage pool 1, and a precipitation being arranged on MAP precipitin reaction device 8 exports the MAP precipitate and separate retrieving arrangement 12 below 11 positions; In aeration agitation mud storage pool 1, its whipping appts 20 has two, horizontal installation and being symmetrical arranged, the paddle 19 of each whipping appts 20 is rectangle, has 4, is separated by 90 ° between adjacent paddle, its aerating apparatus 17 is arranged on below whipping appts 20, on whipping appts 20, below water outlet 3, be provided with poroid baffle plate 2, the diameter in the hole 21 in poroid baffle plate 2 is 1.8cm, and poroid baffle plate 2 can folding shrinking.
In MAP precipitin reaction device 8, the precipitation outlet 11 of be provided with agitator 7, add microcosmic salt pipe 4, add magnesium salts pipe 5, pH controller 9 and water shoot 6, MAP precipitin reaction device is provided with valve 10.
In addition, have mud mouth 16 to connect sludge dehydration device 15 bottom aeration agitation mud storage pool 1, sludge dehydration device 15 has water port 13 and mud discharging mouth 14.Sludge dehydration device 15 can be a kind of in the mechanical dewatering equipment that vacuum filter, plate-and-frame filter press, belt filter press and whizzer etc. are conventional,
Application examples one:
Directly add in aeration agitation mud storage pool by after the residual active sludge natural subsidence of municipal sewage plant's second pond without any pre-treatment, moisture percentage in sewage sludge 99.5%, sludge concentration 7.6g/L.Open aerating apparatus and regulate tolerance 3L/L min, open whipping appts and control stir speed (S.S.) 150rpm, alr mode is that namely pulse interval type often turns 10 seconds and stop 5 seconds.Be respectively 12h, 24h, 48h, 70h, 95h, 120h, 130h, 140h time-division in the treatment time get mixed solution in aeration agitation mud storage pool and carry out centrifugation to it, measure dissolved phosphorus nitrogen concentration in supernatant liquor.
Get each 500ml of second pond residual active sludge after above-mentioned natural subsidence to be distributed in 1000ml wide-mouth reagent bottle simultaneously, add 10%HCl solution and 5%NaOH solution respectively, carry out acid, alkaline purification contrast experiment.Be respectively 12h, 24h, 48h, 70h, 95h, 120h, 140h, 160h time-division in the treatment time to take a morsel acid-alkali treatment liquid carry out centrifugation to it, then measure dissolved phosphorus nitrogen concentration in supernatant liquor.
The treatment solution colourity of acid after process 12h, alkali is all very heavy, and such as after 5%NaOH lignin-sludge, supernatant liquor presents chocolate; 10%HCI treatment solution presents isabelline, and containing a large amount of CI in acid treatment supernatant liquor
-ion.In aeration agitation mud storage pool, supernatant liquor is close with raw waste water color.When aeration time is 130h, dissolved phosphorus, nitrogen that mud melts born of the same parents' release are respectively 129.6mg/L and 163.2mg/L, all higher than the maximum release concentration of phosphorus nitrogen in acid, alkaline purification.
This aeration agitation mud storage pool water outlet is pumped in MAP precipitin reaction device, adds 5%Na
3pO
4solution and 17%MgCl
2solution, makes P/Mg/N mol ratio be 1/1.2/1.Separation and Recovery is carried out to the precipitation Chinese patent 201420458242.0 " a kind of device phosphorus in waste water nitrogen being carried out to the recovery of struvite resource utilization " generated, to record in precipitation magnesium ammonium phosphate content more than 92%.
This process characteristic is that operation is easy, do not introduce new chemical substance, particularly with acid, alkaline purification liquid phase ratio, the treatment solution of air of exposing to the sun is close with raw waste water color, and carry out recovery by phosphorus nitrogen resource in Chinese patent 201420458242.0 pairs of mud and can reduce running cost, aeration terminates rear sludge settling volume and reduces 30-40%, and the utility model provides a kind of mud clean system.
Application examples two:
Directly add in aeration agitation mud storage pool by after the residual active sludge natural subsidence of sewage from oil refinery treatment plant second pond without any pre-treatment, moisture percentage in sewage sludge 99.2%, sludge concentration 6.13g/L.Then open aerating apparatus and regulate tolerance 3L/L min, open whipping appts and control stir speed (S.S.) 250rpm, alr mode is that namely pulse interval type often turns 10 seconds and stop 5 seconds.Be respectively 12h, 24h, 48h, 70h, 95h, 120h, 130h, 150h time-division in the treatment time get mixed solution in aeration agitation mud storage pool and carry out centrifugation to it, measure dissolved phosphorus nitrogen concentration in supernatant liquor.
Get each 500ml of second pond residual active sludge after above-mentioned natural subsidence to be distributed in 1000ml wide-mouth reagent bottle simultaneously, add 10%HCl solution and 5%NaOH solution respectively, carry out acid, alkaline purification contrast experiment.Be respectively 12h, 24h, 48h, 70h, 95h, 120h, 140h, 160h time-division in the treatment time to take a morsel acid-alkali treatment liquid carry out centrifugation to it, then measure dissolved phosphorus nitrogen concentration in supernatant liquor.
The treatment solution colourity of acid after process 12h, alkali is all very heavy, and such as after 5%NaOH lignin-sludge, supernatant liquor presents chocolate; 10%HCI treatment solution presents isabelline, and containing a large amount of CI in acid treatment supernatant liquor
-ion, in aeration agitation mud storage pool, supernatant liquor is close with raw waste water color.When aeration time is 130h, dissolved phosphorus, nitrogen that mud melts born of the same parents' release are respectively 89.6mg/L and 133.2mg/L, all higher than the maximum release concentration of phosphorus nitrogen in acid, alkaline purification.
This aeration agitation mud storage pool water outlet is pumped in MAP precipitin reaction device, adds 5%Na
3pO
4solution and 17%MgCl
2solution, makes P/Mg/N mol ratio be 1/1.2/1.Separation and Recovery is carried out to the precipitation Chinese patent 201420458242.0 " a kind of device phosphorus in waste water nitrogen being carried out to the recovery of struvite resource utilization " generated, to record in precipitation magnesium ammonium phosphate content more than 92%.
This process characteristic is that operation is easy, do not introduce new chemical substance, particularly with acid, alkaline purification liquid phase ratio, the treatment solution of air of exposing to the sun is close with raw waste water color, and carry out recovery by phosphorus nitrogen resource in Chinese patent 201420458242.0 pairs of mud and can reduce running cost, aeration terminates rear sludge settling volume and reduces 30-40%, and the utility model provides a kind of mud clean system.
Claims (7)
1. a residual active sludge recycling treatment system, it is characterized in that, it comprises one and exports by mud import and the residual active sludge of Sewage treatment systems second pond the MAP precipitin reaction device that the aeration agitation mud storage pool, that is connected is connected with the water outlet of aeration agitation mud storage pool, and the MAP precipitate and separate retrieving arrangement below a precipitation outlet position being arranged on MAP precipitin reaction device; In aeration agitation mud storage pool, the paddle of its whipping appts is rectangle, has 4, and be separated by 90 ° between adjacent paddle, its aerating apparatus is arranged on below whipping appts, on whipping appts, below water outlet, be provided with poroid baffle plate.
2. a kind of residual active sludge recycling treatment system according to claim 1, is characterized in that, MAP precipitin reaction device is provided with agitator.
3. a kind of residual active sludge recycling treatment system according to claim 1, is characterized in that, MAP precipitin reaction device is provided with and adds microcosmic salt pipe and add magnesium salts pipe.
4. a kind of residual active sludge recycling treatment system according to claim 1, is characterized in that, MAP precipitin reaction device is provided with water shoot.
5. a kind of residual active sludge recycling treatment system according to claim 1, is characterized in that, the precipitation outlet of MAP precipitin reaction device is provided with valve.
6. a kind of residual active sludge recycling treatment system according to claim 1, is characterized in that having mud mouth to connect sludge dehydration device bottom aeration agitation mud storage pool.
7. a kind of residual active sludge recycling treatment system according to claim 1, is characterized in that, the diameter in the hole in poroid baffle plate is 1.5-2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520601615.XU CN204897679U (en) | 2015-08-12 | 2015-08-12 | Surplus activated sludge resourceful treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520601615.XU CN204897679U (en) | 2015-08-12 | 2015-08-12 | Surplus activated sludge resourceful treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN204897679U true CN204897679U (en) | 2015-12-23 |
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|---|---|---|---|
| CN201520601615.XU Expired - Fee Related CN204897679U (en) | 2015-08-12 | 2015-08-12 | Surplus activated sludge resourceful treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445435A (en) * | 2017-09-27 | 2017-12-08 | 广西田阳县创新农业综合开发有限公司 | A kind of ecological treatment system of breeding integration |
-
2015
- 2015-08-12 CN CN201520601615.XU patent/CN204897679U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445435A (en) * | 2017-09-27 | 2017-12-08 | 广西田阳县创新农业综合开发有限公司 | A kind of ecological treatment system of breeding integration |
| CN107445435B (en) * | 2017-09-27 | 2020-09-04 | 广西田阳县创新农业综合开发有限公司 | Planting and breeding integrated ecological treatment system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20180812 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |