CN201923879U - Sludge hydrolysis, acidification, coupling and denitrification device - Google Patents
Sludge hydrolysis, acidification, coupling and denitrification device Download PDFInfo
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- CN201923879U CN201923879U CN201120006546XU CN201120006546U CN201923879U CN 201923879 U CN201923879 U CN 201923879U CN 201120006546X U CN201120006546X U CN 201120006546XU CN 201120006546 U CN201120006546 U CN 201120006546U CN 201923879 U CN201923879 U CN 201923879U
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Abstract
The utility model discloses a sludge hydrolysis, acidification, coupling and denitrification device, which belongs to the technical field of digested sludge dehydration solution and primary sludge biological treatment. The device is provided with a dehydration solution nitrification raw water tank, a sludge fermentation, coupling and denitrification reactor SIFENDEN, a sludge storage tank and a water outlet pool; and the SIFENDEN reactor comprises a central reaction zone, a surrounding static settling zone and a constant temperature water bath zone on the outermost layer. A method which adopts the device comprises startup and the control of continuous operation. The sludge hydrolysis, acidification, coupling and denitrification device is applicable to a denitrification phase for sludge digestion treatment, so that a carbon source can be saved and the denitrification efficiency is improved. In addition, the integral device has an appropriate microbial growth environment, the occupied area is saved, and the device has the advantage of simplicity and convenience in operation.
Description
Technical field
The utility model relates to digested sludge dehydration liquid and primary sludge biochemical processing field, with the municipal wastewater treatment plant primary sludge is substrate, the volatile organic acid that acidication produces is realized the advanced nitrogen of digested sludge dehydration liquid and the preliminarily stabilised of primary sludge simultaneously as the electron donor of denitrifying bacteria removal nitric nitrogen in integrated apparatus.This technology is fit to be provided with the Sewage Plant of anaerobic sludge digestion technology, and to high ammonia nitrogen, the digested sludge of low ratio of carbon to ammonium dehydration liquid carries out side to be handled, and improves the denitrification operation effect of entire sewage treatment plant.
Background technology
The wastewater treatment in China degree is along with urbanization process significantly improves, and meanwhile the amount of sludge that produces in the sewage disposal also constantly increases.Municipal sludge water ratio height, and contain a large amount of organism and nuisance, must decrement and stable before disposing.Anaerobic digestion is the key link in the common sludge treatment process, and it has the recovery energy, kills pathogenic bacteria, and advantages such as volume decrement 30% are considered to be one of promising sludge treatment technique.But in the anaerobic sludge digestion process, microorganism is discharged into the part ammonia nitrogen in the supernatant liquor by deamination, and the ammonia nitrogen concentration that causes sludge digestion supernatant liquor and follow-up sludge dewatering liquid is up to 500～1000mg/L, and carbon-nitrogen ratio is relatively low.Though the water yield of digested sludge dehydration liquid only accounts for 2% of entire sewage treatment plant, ammonia nitrogen loading accounts for about 25% of entire sewage treatment plant.Traditional method is that the digested sludge liquid that dewaters directly is back to sewage work's front end, but this has obviously increased the ammonia nitrogen loading of reaction zone water inlet, causes effluent quality to be difficult to arrive sewage work's emission standard of increasingly stringent.Digested sludge dehydration liquefied ammonia nitrogen concentration height, the water yield is little, and individual curing is compared with being back to reaction zone, saves floor space, reduces initial cost, and is efficient more economically.Therefore the dehydration of digested sludge efficiently rationally liquid side treatment technology is significant to improving sewage disposal plant effluent water quality.
In digested sludge dehydration liquid biological process denitrification process, the carbon source deficiency becomes the principal element of restriction denitrification effect.Traditional nitration denitrification reaction treatment digested sludge dehydration liquid, nitrogen removal rate is not high.For addressing this problem, improve nitrogen removal rate, it is effective means that the extra intensified anti-nitrated effect of carbon source is provided.In additional carbon, mainly comprise two kinds:
1) single carbon source.The main source of carbon kind has methyl alcohol, acetate, ethanol etc.Methyl alcohol gets the denitrification additional carbon as tradition and uses comparatively extensive in the actual sewage treatment plant.The advantage of single additional carbon is generally can reach higher denitrification rate through domestication, can accurately control added amount of chemical, and operational management is convenient, stable effluent quality.But for reaching suitable denitrification rate and good denitrification effect, need add carbon source according to 2～3 times of theoretical consumption, the working cost costliness can account for 70% of municipal wastewater treatment facility operation and maintenance cost.
(2) compounded carbons.Compounded carbons is very popular in recent years, and voltaile fatty acid is a kind of effective compounded carbons, is meant that carbon atom is 2～6 lipid acid, in municipal effluent/mud based on acetate, propionic acid, butyric acid.Voltaile fatty acid can pass through acetate, and propionic acid etc. easily degraded carbon source manually mix in proportion, also can obtain by anaerobic digestion and pyrolyzing sludge in Sewage Plant, reduce the use of pharmaceutical chemicals and relevant storage problem.Therefore utilize the sludge hydrolytic acidifying to produce VFA as electron donor, do not influence the denitrification effect of microorganism, alleviate the not enough problem of carbon source during Digestive system is handled, realized the minimizing of mud simultaneously, be subjected to domestic and international researchist's attention as a kind of denitride technology of Sustainable development just day by day.
With sewage work's primary sludge anaerobically fermenting and control reaction process in the acidication stage, utilize the carbon sources such as volatile lipid acid that produce to replenish electron donor in the denitrification process, improve denitrification rate and nitrogen removal rate.Meanwhile, the primary sludge preliminarily stabilised helps follow-up processing and disposal.This method is compared traditional denitrification process can save additional carbon, and reduce working cost, and carry out the preliminary treatment of mud simultaneously, be the technology that meets the Sustainable development rule, application market is wide.
The utility model content
The utility model has successfully solved the insufficient problem of carbon source in the digested sludge dehydration liquid denitrification process, in single reaction vessel, and NO
x -Exist and suppress to produce methane reaction, fermenting process is controlled in produces the acid section.The nitrate reduction bacterium utilizes tunning such as acetate etc. to carry out anti-nitration reaction, reaches the effect of mud decrement and digested sludge dehydration liquid denitrogenation simultaneously.By the Rational structure and the waterpower fluidised form of this device, mud flows in the reaction period internal recycling, for acidogenic fermentation bacterium and nitrate reduction bacterium provide best growing environment, sludge degradation speed and denitrification rate is all accelerated.
The utility model is achieved through the following technical solutions:
A kind of sludge hydrolytic acidifying coupling denitrification device: be provided with water tank inlet 1, sludge fermentation coupling denitrification reactor Simultaneous fermentation and denitrification reactor (SIFENDEN) 2, outlet sump 3, primary sludge storage pool 4; What water tank inlet 1 stored is through the pretreated digested sludge dehydration of aerobic nitrification liquid, principal pollutant matter is nitrate, nitrite, the water tank inlet case links to each other with the water intaking valve 2.9 of SIFENDEN reactor (2) by water pump 1.3, and water tank inlet 1 bottom is provided with blow-off valve 1.1, top is provided with upflow tube 1.2, SIFEDEN reactor 2 is by central reaction district 2.13, the quiet heavy district 2.14 of periphery, water bath with thermostatic control district 2.12, whipping appts 2.3, top pressure closure 2.6 compositions such as grade.Top pressure closure 2.6 is connected with cylindrical shell by flange, and the centre adds rubber pad and guarantees sealing effectiveness.Whipping appts 2.3 passes the part of top pressure closure 2.6 and establishes water seal 2.4 maintenance sealings, and reaction zone 2.13 is provided with ORP on-line monitoring instrument 2.5, ORP on-line controller 2.8, and alkali lye bottle 2.2, wet test meter 2.1, the quiet heavy district of periphery establishes vertical flow deflector 2.17; SIFEDEN reactor 2 is established some stopple coupons 2.10, and the bottom is provided with Mud-intake valve 2.11, mud valve 2.16.The water channel 2.7 that goes out on 2.14 tops, the quiet heavy district of periphery is connected to outlet sump 3 by rising pipe 3.1; Mud storage pool 4 is provided with mud valve 4.1, links to each other with SIFENDEN reactor 2 by dredge pump 4.2.
Utilize above-mentioned sludge hydrolytic acidifying coupling denitrification device to carry out while denitrogenation and method for sludge treatment, mainly may further comprise the steps:
1) seed sludge: the electric heating system of opening the water bath with thermostatic control district, set temperature of reactor and maintain 35 ℃; get municipal sewage plant, Beijing fresh sludge and be stored in the primary sludge storage pool; and disposable to the fresh primary sludge of the reaction zone adding 150L of SIFENDEN reactor; and according to the character of primary sludge, the sludge concentration scope of adjusting and keep the SIFEDEN inside reactor is at 10～15kgMLSS/m
3
2) unloading phase: open the whipping appts of SIFENDEN reactor, by water pump water inlet continuously from water tank, water inlet total nitrogen concentration 250～300mg/L, wherein nitric nitrogen concentration 220～280mg/L.The control hydraulic detention time is 10h, and the nitric nitrogen concentration in the water outlet is maintained more than the 10mg/L.Regularly discharge mixing sludge 50L from reaction zone every day, adds fresh primary sludge 50L.This operation scheme can be utilized long characteristics methanogen growth generation time simultaneously so that the denitrifying bacteria ramp, by spoil disposal gradually the methanogen in the reactor eluriate out system.Operation under these conditions, when in the gas detection that produces less than methane, when the denitrification rate of reactor no longer further improves, determine to start and finish to enter the smooth running phase;
3) operation continuously: the water inlet of SIFEDEN reactor is a Continuous Flow, and the primary sludge that denitrifying carbon source is provided is for intermittently adding.The intermediate stage that adds mud for twice is as a cycle of operation.Section at the beginning of the cycle of operation, the amount of the mud that adds is advisable with the SS in the not obvious increase water outlet, and at cycle of operation end, the nitric nitrogen concentration that guarantees water outlet is less than 10mg/L.When the nitric nitrogen concentration of water outlet surpasses set(ting)value, to discharge reaction zone certain volume mud, and add the fresh primary sludge of same volume, reaction enters the new cycle.
The utlity model has following beneficial effect:
The utility model is with reaction zone, and settling region, mud recirculating zone have been built in the same reaction unit, guarantees the strictly anaerobic state of total system by ring flange and water seal.The whipping appts that uses has the lifting mixing effect, and mixed solution is in turbulent state in the reaction zone, makes substrate more abundant with contacting of microorganism, easier being degraded of harmful meta-bolites of generation.That this equipment has a good practicality and processing property.Compare with traditional sludge carbon source development technology, the utility model also has following advantage:
1) economy.The small-sized integrated floor space that reduced of this device, the mud internal reflux replaces external reflux, has saved the money of second pond and the power consumption of backflow.
2) fermentation rate improves.Eluriate technology with traditional sludge fermentation and compare, the solid mean residence time increases, and the acid-producing bacteria living environment is suitable.Tunning has been weakened the substrate restraining effect by nitrate reduction bacterium mass consumption, and fermentation rate can further improve.
3) denitrification rate improves.The inside reactor carbon source is abundant, realizes fully mixing of substrate and microorganism by stirring action, and the environment nitrate of strict sealing also makes denitrification rate accelerate as main electron acceptor(EA), and hydraulic detention time shortens.
Description of drawings
Fig. 1 is the structural representation of the utility model device.
Fig. 2 is the floor map of the utility model device.
Among the figure 1---water tank inlet; 2---sludge fermentation coupling denitrification reactor; 3---outlet sump; 4---the primary sludge storage pool; 1.1---blow-off valve; 1.2---upflow tube; 1.3---water pump; 2.1---wet test meter; 2.2---the alkali lye bottle; 2.3---whipping appts; 2.4---water seal; 2.5---ORP on-line monitoring instrument; 2.6---top pressure closure; 2.7---go out water channel; 2.8---the OPR on-line controller; 2.9---water intaking valve; 2.10---stopple coupon; 2.11---Mud-intake valve; 2.12 water bath with thermostatic control district; 2.13---the central reaction district; 2.14---the quiet heavy district of periphery; 2.15---the water-bath blow-off valve; 2.16---mud valve; 2.17---vertical flow deflector; 3.1---rising pipe; 4.1---mud valve; 4.2---dredge pump
Embodiment
In conjunction with the accompanying drawings and embodiments to the application's patent further instruction: as shown in Figure 1, sludge fermentation coupling denitrification device of the present utility model is made up of nitrification liquid storage water tank (1), sludge fermentation coupling denitrification reactor SIFEDEN (2), sludge sump (3), the outlet sump (4) of sludge dewatering liquid.Nitrification liquid raw water box (1) is 400L, and the useful volume of SIFEDEN reaction zone (2.13) is 150L, and reactor size is Φ H=50cm * 90cm, periphery quiet heavy district (2.14) volume 100L, and water bath with thermostatic control district (2.12) are 300L.Outlet sump volume 60L.
The sludge dewatering liquid that embodiment uses is taken between the sludge of sewage treatment plant dehydration of Gaobeidian City, Beijing, is converted into through most ammonia-nitrogen behind the aeration
Nitrate concentration 10～20mg/L wherein, nitrous acid concentration 150～180mg/L.Contain high density
Be stored in former water tank 1.The mud in primary sludge pond is taken from the pressure pipeline behind the Sewage Plant mud storage pool, and this mud is typical primary sludge, concentration 15kgMLSS/m
3, TCOD is 20g/L, the ratio of volatile sludge concentration MLVSS and sludge concentration MLSS is between 0.67～0.8.
Utilize the working method step of said apparatus as follows:
1) seed sludge: the electric heating system of opening the water bath with thermostatic control district, set temperature of reactor and maintain 35 ℃; get municipal sewage plant, Beijing fresh sludge and be stored in the primary sludge storage pool; and disposable to the fresh primary sludge of the reaction zone adding 150L of SIFENDEN reactor; and according to the character of primary sludge, the sludge concentration scope of adjusting and keep the SIFEDEN inside reactor is at 10～15kgMLSS/m
3
2) unloading phase: open the whipping appts of SIFENDEN reactor, by water pump water inlet continuously from water tank, water inlet total nitrogen concentration 250～300mg/L, wherein nitric nitrogen concentration 220～280mg/L.The control hydraulic detention time is 10h, and the nitric nitrogen concentration in the water outlet is maintained more than the 10mg/L.Regularly discharge mixing sludge 50L from reaction zone every day, adds fresh primary sludge 50L.This operation scheme can be utilized long characteristics methanogen growth generation time simultaneously so that the denitrifying bacteria ramp, by spoil disposal gradually the methanogen in the reactor eluriate out system.Operation under these conditions, when in the gas detection that produces less than methane, when the denitrification rate of reactor no longer further improves, determine to start and finish to enter the smooth running phase.
3) operation continuously: the water inlet of SIFEDEN reactor is a Continuous Flow, and the primary sludge that denitrifying carbon source is provided is for intermittently adding.The intermediate stage that adds mud for twice is as a cycle of operation.Section at the beginning of the cycle of operation, the amount of the mud that adds is advisable with the SS in the not obvious increase water outlet, and at cycle of operation end, the nitric nitrogen concentration that guarantees water outlet is less than 10mg/L.When the nitric nitrogen concentration of water outlet surpasses set(ting)value, to discharge reaction zone certain volume mud, and add the fresh primary sludge of same volume, reaction enters the new cycle.
The successive test-results shows: in temperature is 35 ℃, and the sludge concentration MLSS in the SIFEDEN reactor remains on 10～15kgMLSS/m
3, water inlet NO
x -Concentration 160～200mg/L, hydraulic detention time 20h, average solid retention time 15d, 3 months test-results of steady running shows: system's water outlet
Each period T COD drops to 8000mg/L, and the ratio of MLVSS/MLSS drops to 0.35, and denitrifying capacity is 0.1kgN/KgMLVSS, and the output of equivalent VFA is 0.5mgVFA/ (mgVSS.d).System has successfully realized the denitrification denitrogenation of synchronous sludge fermentation and sludge dewatering liquid.
Claims (1)
1. a sludge hydrolytic acidifying coupling denitrification device is characterized in that: be provided with water tank inlet (1), sludge fermentation coupling denitrification reactor (2), outlet sump (3), primary sludge storage pool (4); What water tank inlet (1) stored is through the pretreated digested sludge dehydration of aerobic nitrification liquid, principal pollutant matter is nitrate, nitrite, water tank inlet (1) links to each other with the water intaking valve (2.9) of SIFENDEN reactor (2) by water pump (1.3), water tank inlet (1) bottom is provided with blow-off valve (1.1), top is provided with upflow tube (1.2), SIFEDEN reactor (2) is by central reaction district (2.13), periphery quiet heavy district (2.14), water bath with thermostatic control district (2.12), whipping appts (2.3), top pressure closure compositions such as (2.6); Top pressure closure (2.6) is connected with cylindrical shell by flange, and the centre adds rubber pad and guarantees sealing effectiveness; Whipping appts (2.3) passes the part of top pressure closure (2.6) and establishes water seal (2.4) maintenance sealing, reaction zone (2.13) is provided with ORP on-line monitoring instrument (2.5), ORP on-line controller (2.8), alkali lye bottle (2.2), wet test meter (2.1), the quiet heavy district of periphery establishes vertical flow deflector (2.17); SIFEDEN reactor (2) is established some stopple coupons (2.10), and the bottom is provided with Mud-intake valve (2.11), mud valve (2.16); The water channel (2.7) that goes out on top, periphery quiet heavy district (2.14) is connected to outlet sump (3) by rising pipe (3.1); Mud storage pool (4) is provided with mud valve (4.1), links to each other with SIFENDEN reactor (2) by dredge pump (4.2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120006546XU CN201923879U (en) | 2011-01-11 | 2011-01-11 | Sludge hydrolysis, acidification, coupling and denitrification device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120006546XU CN201923879U (en) | 2011-01-11 | 2011-01-11 | Sludge hydrolysis, acidification, coupling and denitrification device |
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| CN201923879U true CN201923879U (en) | 2011-08-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101718A (en) * | 2011-01-11 | 2011-06-22 | 彭永臻 | Sludge hydrolysis acidification coupling denitrification device and treatment method thereof |
| CN102442724A (en) * | 2011-11-02 | 2012-05-09 | 北京工业大学 | System and method for processing residual sludge decrement synchronous denitrification |
| CN106542710A (en) * | 2016-11-25 | 2017-03-29 | 中国科学院重庆绿色智能技术研究院 | A kind of sludge alkaline hydrolysis carbon source makeup is put |
-
2011
- 2011-01-11 CN CN201120006546XU patent/CN201923879U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101718A (en) * | 2011-01-11 | 2011-06-22 | 彭永臻 | Sludge hydrolysis acidification coupling denitrification device and treatment method thereof |
| CN102101718B (en) * | 2011-01-11 | 2012-09-05 | 彭永臻 | Sludge hydrolysis acidification coupling denitrification device and treatment method thereof |
| CN102442724A (en) * | 2011-11-02 | 2012-05-09 | 北京工业大学 | System and method for processing residual sludge decrement synchronous denitrification |
| CN102442724B (en) * | 2011-11-02 | 2013-07-17 | 北京工业大学 | Method for processing residual sludge decrement synchronous denitrification |
| CN106542710A (en) * | 2016-11-25 | 2017-03-29 | 中国科学院重庆绿色智能技术研究院 | A kind of sludge alkaline hydrolysis carbon source makeup is put |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110810 Effective date of abandoning: 20120905 |