CN201634552U - Sludge treatment equipment with alkaline pretreatment coupling hydrolysis acidification method - Google Patents
Sludge treatment equipment with alkaline pretreatment coupling hydrolysis acidification method Download PDFInfo
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- CN201634552U CN201634552U CN2009202759463U CN200920275946U CN201634552U CN 201634552 U CN201634552 U CN 201634552U CN 2009202759463 U CN2009202759463 U CN 2009202759463U CN 200920275946 U CN200920275946 U CN 200920275946U CN 201634552 U CN201634552 U CN 201634552U
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Abstract
The utility model relates to sludge treatment equipment with alkaline pretreatment coupling hydrolysis acidification method, aiming at the problems of deficient carbon source and sludge treatment difficulty in a sewage treatment plant and belonging to the field of sludge and sewage treatment technology; the device comprises a strong alkaline perfect mixing pretreatment continuous stirred-tank reactor CSTR, an upflow reinforced hydrolysis acidification reactor UHAR, a sludge hydrolysis acidification liquid chemical denitrification and phosphorous removal reaction tank CPR and a master controller; the master controller comprises a time relay, a pH temperature sensor, a pH sensor and a computer, and a drug adding device; the device has simple operation and is easy to control; the reduction rate of the remnant active sludge after two-level alkaline hydrolysis acidification is carried out is higher than 30 percent, and recycle of organic carbon sources in the remnant active sludge is realized.
Description
Technical field
The utility model relates to a kind of sludge anaerobic biological treatment device, is applicable to the extraction and the recycling of organic carbon source in the decrement treatment of a large amount of residual active sludges that produce in the municipal effluent traditional biological treating processes and the mud.Belong to the mud and sewage processing technology field.
Background technology
The body eutrophication problem becomes increasingly conspicuous, nitrogen phosphorus emission standard increasingly stringent.China has increased the emission concentration restriction to total nitrogen and total phosphorus in " the urban wastewater treatment firm pollutant emission standard " of promulgation in 2002.In biological wastewater treatment process, denitrification denitrogenation need consume a large amount of dissolved organic carbon (SOC), and enhanced biological phosphorus removal need consume a large amount of VFA carbon sources (VFAs).Yet the actual sewage treating processes is usually because the carbon source deficiency causes denitrogenation dephosphorizing efficient low, and the target of advanced nitrogen dephosphorization is difficult to realize especially.During carbon source, effluent quality is improved, but has increased processing cost outside adding methyl alcohol, ethanol etc.Carbon source problem in the municipal sewage treatment has become the bottleneck of biological process advanced nitrogen dephosphorization.
Sewage work mainly is that mud concentrates, filter-press dehydration to the processing mode of mud at present, carries out anaerobic sludge digestion then.The a large amount of organic carbon sources that contain in mud and the sludge microbe finally are converted into methane.Excess sludge can produce a large amount of polysaccharide, protein and VFAs carbon source in the acidication stage, and they can be used as the supplementary carbon source that the Sewage Plant biological nutrients is removed (BNR) system.The mud flco is destructurized in the acidication process, and microorganism cells breaks, and intracellular organic matter flows out.These materials at first are converted into polysaccharide, protein etc. under the anerobe effect, under enzyme effects such as alpha-glycosidase, proteolytic enzyme, further be converted into monose, amino acid and longer chain fatty acid etc. afterwards, and finally be converted into VFAs forms such as acetate, propionic acid, butyric acid by different biological approaches, discharge a certain amount of PO simultaneously
4 3--P and NH
4 +-N.In the time of 35 ℃, the time of sludge anaerobic acidication is long, and SOC and VFAs productive rate are lower.If not with the degraded of the particulate organic matter in the mud, mud has only the dissolved organic matter (SCOD) of 30%-50% to produce through the 30d acidication.And the PO that excess sludge acidication process discharges
4 3--P and NH
4 +-N may increase nitrogen, the phosphorus load of structures.Therefore, be necessary to adopt some pretreatment processs to shorten the sludge hydrolytic acidificatoin time, improve SOC and VFAs productive rate, and to PO
4 3--P and NH
4 +-N reclaims.
The utility model content
The utility model purpose is at problems such as sewage work's carbon source shortage and sludge treatment difficulties, and a kind of two grade alkaline hydrolysis and acidification device for processing residual activated sludge and sludge carbon source recovery method are provided, and realizes the recycle to organic carbon source in the mud.These apparatus and method effectively are controlled at the acidication stage with sludge treatment, and hydrolytic acidification time shortens to 8.5 days, and operation control is simple.
The utility model has destroyed the flco structure of former excess sludge because residual active sludge has been taked strong-alkaline pretreatment method, has accelerated the organic hydrolysis rate of particulate state, thereby has helped the carrying out of acidization, and SOC and VFAs productive rate are obviously improved.
The utility model adopts sanitary sewage to eluriate out the high density carbon source that the sludge hydrolytic acidifying produces, can select whether the sludge hydrolytic acidizing fluid is carried out magnesium ammonium phosphate chemical precipitation method denitrogenation dephosphorizing flexibly according to the load and the processing power of follow-up biological nutrient removal system (BNR).
For achieving the above object, the utility model has been taked following technical scheme:
This device comprises that the one-level strong basicity mixes pre-treatment agitated pool CSTR 1 fully, be connected first whipping appts 2 on 1, be arranged on 1 top Mud-intake valve 3, link to each other with Mud-intake valve 3 advance dredge pump 4 and be arranged on the mud valve 5 of 1 bottom, a pH temperature sensor 6 that is arranged in 1 connects master controller 7, and volume pump 9 is communicated with the formation path with mud valve 5 with the mud water intaking valve 10 that advances of secondary flow lifting type enhanced hydrolysis acidification reactor UHAR8 bottom.The UHAR middle part is provided with mud valve 11 in addition, top is provided with outlet valve 12, intake pump 13 with advance mud water intaking valve 10 and link to each other, recycle pump 14 is communicated with to advance mud water intaking valve 10 and the UHAR middle part makes it to form the loop line, is provided with the 2nd pH temperature sensor 15 in the UHAR and links to each other with master controller 7.Outlet valve 12 is connected on the sludge hydrolytic acidizing fluid chemistry denitrogenation dephosphorizing reaction tank CPR16, and CPR top is provided with second whipping appts 17 and pH transmitter 19, and the bottom is provided with muddy water outlet 18.Described master controller 7 comprises the time relay and a pH temperature sensor 6, the 2nd pH temperature sensor 15, pH transmitter 19 and the computer that is connected on into dredge pump 4, volume pump 9, outlet valve 12, second whipping appts 17, also comprises medicament throwing device 20.Controller feeds back to sequence of control with the pH data that collect, and sequence of control mixes among pre-treatment agitated pool CSTR 1, secondary flow lifting type enhanced hydrolysis acidification reactor UHAR8 and the sludge hydrolytic acidizing fluid chemistry denitrogenation dephosphorizing reaction tank CPR16 at regular time and quantity the corresponding medicament that adds in the one-level strong basicity respectively fully by opening and closing medicament throwing device 20.
The method of using described device recovery sludge carbon source comprises the steps:
1) pre-treatment of mud strong basicity is opened the Mud-intake valve 3 that is connected with CSTR1, is advanced the dredge pump 4 and first whipping appts 2, and residual active sludge enters the total amount of CSTR by controller 7 controls.After advancing mud and finishing, the pH temperature sensor 6 on the CSTR reactor feeds back to controller 7 with pH and temperature data, and controller 7 is adjusted temperature about 35 ℃ according to predefined program, and opens medicament throwing device 20 and add NaOH solution to regulate pH be 10.0.By sludge retention time in the time opening mud valve 5 control CSTR reactors is 2.5 days.
2) time relay that links to each other with volume pump 9 of mud flow lifting type enhanced hydrolysis acidifying controller 7 time openings, the pretreated mud of strong basicity is squeezed in the UHAR reactor 8, pH temperature sensor 15 is delivered to controller 7 with the pH parameter, and controller 7 adds NaOH by medicament throwing device 20 pH among the UHAR is controlled at 8.0.By sludge retention time from mud valve 11 spoil disposals control UHAR reactor is 6 days, realizes mixing with the muddy water of bottom in the middle part of the pillar by recycle pump 14.For the mud acidizing fluid carbon source in the UHAR reactor can be flowed out continuously, sanitary sewage is squeezed into continuously by intake pump 13 and the acidizing fluid elutriation is taken out of through advancing mud water intaking valve 10, and hydraulic detention time is 8 hours.
3) mud acidizing fluid magnesium ammonium phosphate sediment method denitrogenation dephosphorizing mud acidizing fluid is eluriated after outlet valve 12 flows into chemical dephosphorization reaction tank CPR16 through sanitary sewage, question response pond median water level reaches 2/3 when above of cumulative volume, outlet valve 12 is closed, and the pH in the CPR reactor 16 is adjusted into 9.0 by pH transmitter 19, controller 7 and medicament throwing device 20, and according to the Mg that sets: P: N molar ratio range (1.2～1.5: 0.8～1.2: 1) add chemical reagent and remove part NH
4 +-N and PO
4 3--P.Mixed solution is discharged by muddy water outlet 18 through the post precipitation water outlet, as the supplementary carbon source of BNR system.Total reaction time in the chemical dephosphorization reaction tank (CPR) 16 is 60 minutes, comprises adding reagent and stirring 20～30 minutes, sedimentation and drawing 30～40 minutes.
Characteristics that the utlity model has and beneficial effect:
1) realized decrement treatment to residual active sludge, the mud decrement rate is higher than 30% behind two-stage alkaline hydrolysis acidizing.Excess sludge two-stage alkaline hydrolysis acidizing device cumulative volume is 56L, recyclable a large amount of mud acidizing fluid carbon source.
2) adopt two-stage alkaline sludge acidication technology, carry out the strong basicity pre-treatment earlier and then carry out weakly alkaline hydrolysis acidifying intensive treatment.This method makes sludge hydrolytic efficient bring up to 38%, and acidifying efficient has brought up to 51%, and the sludge hydrolytic acidificatoin time has shortened to 8.5 days by common 30～40 days.
3) the utility model has carried out the processing of chemical method denitrogenation dephosphorizing to the sludge hydrolytic acidizing fluid, and this method can be removed 50% NH
4 +-N and 95% PO
4 3--P.Handle back TSOC concentration and reach 200mgC/L～300mgC/L, wherein the VFA ratio accounts for 50%～60%, makes mud acidizing fluid carbon source be more suitable for supplementary carbon source as the BNR system.
3) adopt sanitary sewage that the organism of stripping in the mud acidization among the flow lifting type enhanced hydrolysis acidizing device UHAR is eluriated and take out of, this mode has realized promptly that to great amount of soluble organic elutriation also helps in the sanitary sewage difficult degradation particulate organic matter simultaneously and realizes degrading in the anaerobic hydrolysis-acidification environment.
4) flow lifting type enhanced hydrolysis acidizing device UHAR has realized separating of sludge retention time SRT and hydraulic detention time HRT, and wherein SRT is 6 days, and HRT is 8 hours.This mainly is because intermittently advance the mud operation scheme of water inlet continuously.This reaction unit is provided with the reducing zone in addition, and the upflow velocity reduction at these zone current helps the sludge settling in the mixed solution.There is tangible mud-water separation face reactor upper end, thereby helps to realize separating of SRT and HRT.
5) mud two-stage alkaline hydrolysis acidizing device operation control is easy, flexible operation, and each structure structure is simple, the convenient upgrading of realizing.Can select whether to adopt chemical denitrogenation dephosphorizing reaction tank according to the load and the processing power of follow-up BNR system, when not needing that the sludge hydrolytic acidizing fluid carried out the chemical method denitrogenation dephosphorizing, original CPR reaction tank can be used as settling tank or tank.
The utility model can be widely used in organicly in sludge treatment in the middle or small sewage treatment and the mud obtaining and utilizing.
Description of drawings
Fig. 1 is the structural representation of residual active sludge two-stage alkaline hydrolysis acidizing device.
Fig. 2 is hydrolysis efficiency and the acidifying efficient design sketch in the mud two-stage alkaline hydrolysis acidizing method.
Fig. 3 is SOC and the VFA variation tendency design sketch in the mud two-stage alkaline hydrolysis acidizing method.
Fig. 4 is that the magnesium ammonium phosphate sediment method is to NH in the acidication liquid
4 +-N and PO
4 3-The place to go design sketch of-P.
Among the figure: 1. strong basicity is mixed pre-treatment agitated pool CSTR fully; 2. first whipping appts; 3. Mud-intake valve; 4. advance dredge pump; 5. mud valve; 6.pH temperature sensor; 7. controller; 8. flow lifting type enhanced hydrolysis acidification reactor UHAR; 9. volume pump; 10. advance the mud water intaking valve; 11. mud valve; 12. outlet valve; 13. intake pump; 14. recycle pump; 15.pH temperature sensor; 16. sludge hydrolytic acidizing fluid chemistry denitrogenation dephosphorizing reaction tank CPR; 17. second whipping appts; 18. muddy water outlet; 19.pH transmitter; 20. medicament throwing device.
Embodiment
Describe the utility model in detail in conjunction with legend and embodiment:
Residual active sludge two-stage alkaline hydrolysis acidizing device as shown in Figure 1.This device cumulative volume 46L, useful volume 31L.Comprise that mainly the one-level strong basicity mixes pre-treatment agitated pool CSTR1 fully, secondary flow lifting type enhanced hydrolysis acidification reactor UHAR8 and sludge hydrolytic acidizing fluid chemistry denitrogenation dephosphorizing reaction tank CPR16, and the pipeline, valve, volume pump and the control device that connect these main body reactors.Wherein the one-level strong basicity is mixed pre-treatment agitated pool CSTR1 effective volume 5L fully, is provided with first whipping appts 2, Mud-intake valve 3, and mud valve 5 and pH temperature sensor 6 can be realized pH regulator and temperature control by controller 7 and medicament throwing device 20.Secondary flow lifting type enhanced hydrolysis acidification reactor UHAR8 effective volume 16L is provided with into mud water intaking valve 10, mud valve 11, outlet valve 12, intake pump 13 and recycle pump 14, the pH temperature sensor 15 that links to each other with controller 7.Secondary flow lifting type enhanced hydrolysis acidification reactor UHAR8 bottom is the mud mixing zone, realizes that by recycle pump 14 muddy water mixes, and the reactor middle part is provided with reducing for the sludge settling district, and reactor top is the mud-water separation district, and the acidizing fluid water outlet is flowed out by water outlet.Sludge hydrolytic acidizing fluid chemistry denitrogenation dephosphorizing reaction tank CPR16 effective volume 10L, be provided with outlet 18 of second whipping appts 17 and muddy water and pH transmitter 19, regulate pH by controller 7 and medicament throwing device 20, and add nitrogen, phosphorus in the chemical reagent generation magnesium ammonium phosphate sediment removal acidication liquid.
Concrete treating processes is as follows:
The certain density residual active sludge of 2L is at first squeezed into the one-level strong basicity and is mixed pre-treatment agitated pool CSTR1 fully by advancing dredge pump 4 through Mud-intake valve 3, mix the about 15g/L～20g/L of sludge concentration in the CSTR reactor of back, pH and temperature are constant in respectively 10.0 and 35 ℃ by controller 7.Excess sludge residence time in CSTR is 2.5 days.
Mud is after the strong basicity pre-treatment, and controller 7 is opened mud valve 5 by volume pump 9 the pretreated mud of 2L strong basicity is squeezed into secondary flow lifting type enhanced hydrolysis acidification reactor UHAR8, and UHAR mixing zone sludge concentration is between 10g/L～15g/L.The pH transmitter feeds back to controller 7 with the pH data, and controller 7 calling programs are opened medicament throwing device 20, thereby adjusting pH value is constant in 8.0, no temperature control.With this simultaneously sanitary sewage continuously squeeze among the UHAR by intake pump 13 by advancing mud water intaking valve 10, the SOC that the sludge hydrolytic acidifying is produced takes out of with water outlet, recycle pump 14 continuously circulates between sludge settling district and muddy water mixing zone and mixes.The UHAR reactor is regularly from mud valve 11 spoil disposals, SRT is 6 days, and HRT is 8h, by the reducing effect realization sludge retention time in sludge settling district, reactor middle part and separating of dwell time of sewage, be that mud liquid level volume is controlled at 12L in the reactor, the sewage level volume is controlled at 16L.
One of CSTR pre-treatment agitated pool 1 and UHAR reactor for hydrolysis and acidification 8 is characterised in that: the circulation of mud in two reactors is intermittently, and the circulation of sanitary sewage in the UHAR reactor for hydrolysis and acidification is successive, and Mud-intake valve on the CSTR 3 and mud valve 5 are intermittently startings, mud valve 5 is at first opened, treat pre-treatment mud among the CSTR squeeze into the UHAR reactor after mud valve 5 close, this moment, Mud-intake valve 3 was opened the undressed residual active sludge of injection in the CSTR.
The SOC of sludge hydrolytic acidifying institute stripping flows into sludge hydrolytic acidizing fluid chemistry denitrogenation dephosphorizing reaction tank CPR16 with sanitary sewage in the UHAR reactor.When liquid in the reaction tank is to reach 2/3 when above of cumulative volume, close outlet valve 12 and open second whipping appts 17 by controller 7, controller 7 by calling program by medicament throwing device 20 in reaction tank according to the Mg that sets: P: N mol ratio (1.2～1.5: 0.8～1.2: 1) add magnesium salts and phosphoric acid salt, pH transmitter 19 is sent to controller 7 with the pH data, and controller 7 feeds back to medicament throwing device 20 again and by adding NaOH pH is adjusted to 9.0.Close second whipping appts 17 behind 20～30min and precipitate, post precipitation is opened muddy water outlet 18, at first chemical precipitates is discharged, and then the discharge of the acidizing fluid after will handling supplies BNR treatment system carbon source as a supplement.UHAR reactor outlet valve 12 is closed always in 60 minutes of CPR reaction tank operation, the superelevation water level that reserve in the UHAR reactor this moment can temporarily store the acidizing fluid water outlet, when outlet valve 12 was opened once more, acidizing fluid can flow into the CPR reaction tank and prepare for chemical treatment next time.One of CPR reaction tank 16 is characterised in that to the concentration of nitrogen and phosphorus in the UHAR reactor water outlet acidizing fluid when less demanding that can cancel the chemical method denitrogenation dephosphorizing and handle, this moment, the CPR reaction tank can be used as the acidizing fluid settling tank.
Embodiment: with real life sewage (pH=6.5～7.8 of certain university's dependents' district discharging, COD=260～350mg/L, a large amount of residual active sludges that TN=60～85mg/L) is produced as the A/O reactor and the oxidation ditch reactor of experimental subjects, this active sludge mix and also concentrate the back as two grade alkaline hydrolysis and acidification device for processing mud.Entire reaction system effective volume is 31L, and it is 15～20g/L that mud concentrates back MLSS, and TCOD is 17.6～25.2g/L.Add thickened sludge 2L every day, produce available sludge hydrolytic acidizing fluid 48L.Behind the system stability, mud two-stage alkaline hydrolysis efficient can reach 38.19%, and acidifying efficient reaches 51.69%, as shown in Figure 2.SOC concentration is 180～430mgC/L in the water outlet of mud two-stage alkaline hydrolysis acidizing liquid, and VFA concentration is 75～150mgC/L, as shown in Figure 3.Mud two-stage alkaline hydrolysis acidizing liquid is pressed Mg: P: N mol ratio (1.2: 0.8: 1) under the pH=9.0 condition behind magnesium ammonium phosphate sediment, NH
4 +-N clearance is 55%, PO
4 3--P clearance is 93%, and the loss that chemical precipitation method causes the VFA carbon source＜5%, as shown in Figure 4.
Claims (1)
1. alkaline pre-treatment coupling acidication method sludge treatment equipment, it is characterized in that: this device comprises that strong basicity mixes pre-treatment agitated pool CSTR (1) fully, be connected first whipping appts (2) on the CSTR, be arranged on the Mud-intake valve (3) on CSTR top, what link to each other with Mud-intake valve (3) advances dredge pump (4) and is arranged on the mud valve (5) of CSTR bottom, a pH temperature sensor (6) that is arranged in the CSTR connects master controller (7), and volume pump (9) is communicated with the formation path with mud valve (5) with the mud water intaking valve (10) that advances of flow lifting type enhanced hydrolysis acidification reactor UHAR (8) bottom; The UHAR middle part is provided with mud valve (11), top is provided with outlet valve (12), intake pump (13) with advance mud water intaking valve (10) and link to each other, recycle pump (14) is communicated with to advance mud water intaking valve (10) and the UHAR middle part makes it to form the loop line, is provided with the 2nd pH temperature sensor (15) that links to each other with master controller (7) in the UHAR; Outlet valve (12) is connected on the sludge hydrolytic acidizing fluid chemistry denitrogenation dephosphorizing reaction tank CPR (16), and CPR top is provided with second whipping appts (17) and pH transmitter (19), and the bottom is provided with muddy water outlet (18); Described master controller (7) comprises the time relay and a pH temperature sensor (6), pH temperature sensor (15), pH transmitter (19) and the computer that is connected on into dredge pump (4), volume pump (9), outlet valve (12), second whipping appts (17), also comprises medicament throwing device (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009202759463U CN201634552U (en) | 2009-12-18 | 2009-12-18 | Sludge treatment equipment with alkaline pretreatment coupling hydrolysis acidification method |
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|---|---|---|---|
| CN2009202759463U CN201634552U (en) | 2009-12-18 | 2009-12-18 | Sludge treatment equipment with alkaline pretreatment coupling hydrolysis acidification method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161707A (en) * | 2011-12-19 | 2013-06-19 | 袁平 | Pneumatic plunger metering pump |
| CN111217504A (en) * | 2019-12-10 | 2020-06-02 | 中冶华天工程技术有限公司 | Organic cracked sludge carbon source recycling method |
| CN116161790A (en) * | 2023-01-19 | 2023-05-26 | 北京工业大学 | Improved method and device for efficient denitrification and synchronous excess sludge reduction of domestic sewage |
| CN116161790B (en) * | 2023-01-19 | 2024-06-04 | 北京工业大学 | Improved method and device for efficient denitrification and synchronous excess sludge reduction of domestic sewage |
-
2009
- 2009-12-18 CN CN2009202759463U patent/CN201634552U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161707A (en) * | 2011-12-19 | 2013-06-19 | 袁平 | Pneumatic plunger metering pump |
| CN111217504A (en) * | 2019-12-10 | 2020-06-02 | 中冶华天工程技术有限公司 | Organic cracked sludge carbon source recycling method |
| CN116161790A (en) * | 2023-01-19 | 2023-05-26 | 北京工业大学 | Improved method and device for efficient denitrification and synchronous excess sludge reduction of domestic sewage |
| CN116161790B (en) * | 2023-01-19 | 2024-06-04 | 北京工业大学 | Improved method and device for efficient denitrification and synchronous excess sludge reduction of domestic sewage |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101117 Effective date of abandoning: 20091218 |