CN103011507B - Control method and device for deep denitrification treatment of garbage leachate by combination of short-range nitrification and anaerobic ammoxidation - Google Patents
Control method and device for deep denitrification treatment of garbage leachate by combination of short-range nitrification and anaerobic ammoxidation Download PDFInfo
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- CN103011507B CN103011507B CN201210537488.2A CN201210537488A CN103011507B CN 103011507 B CN103011507 B CN 103011507B CN 201210537488 A CN201210537488 A CN 201210537488A CN 103011507 B CN103011507 B CN 103011507B
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Abstract
The invention discloses a control method and device for deep denitrification treatment of garbage leachate by combination of short-range nitrification and anaerobic ammoxidation, relating to the field of biological sewage treatment. The invention can solve the problem of difficulty in deep denitrification of garbage leachate. Denitrification reaction and organic substance removal are carried out in a first SBR (sequencing batch reactor), and the process is controlled by real-time ORP and pH monitoring. 60% of effluent water of the first SBR directly enters a second SBR to be subjected to short-range nitrification which is controlled by real-time DO and pH monitoring. 40% of effluent water of the first SBR and effluent water of the second SBR are mixed and enter an ASBR (anaerobic sequencing batch reactor) in a continuous water inlet mode to be subjected to anaerobic ammoxidation, and the process is controlled by real-time pH monitoring. After draining, 70% of effluent water flows back to an influent water tank, and the rest of effluent water is discharged for the next cycle. The invention can accurately control the denitrification mixing time as well as organic substance removal and short-range nitrification aeration time, and has the advantages of energy consumption saving, shorter reaction time, no need of external carbon source, high TN removal rate and the like.
Description
Technical field
The present invention relates to biological sewage treatment field, especially a kind of control method and device that percolate is carried out to advanced nitrogen processing.
Background technology
Along with the progressively raising of economic fast development and people's living standard, municipal wastes output constantly increases.At the most of rubbish of China, adopt landfill disposal at present, garbage loading embeading is a kind of effectively cheap processing mode, yet the percolate being produced by landfill has had a strong impact on the water surrounding of China.Percolate be rubbish stack and landfill process in pass through rainwater shower, wash away and the immersion of fermentation and surface water, underground water and ooze drop sewage out.Percolate is chocolate, and composition is very complicated, contains a large amount of organism and ammonia nitrogen, is also rich in poisonous and hazardous heavy metal ion simultaneously, belongs to high ammonia nitrogen used water difficult to degradate.Discharge percolate bring severe contamination can to the environment such as atmosphere around, water body, soil, and particularly ammonia nitrogen in high density can produce and poisons and cause water eutrophication water body.
The processing of percolate mainly adopts physico-chemical processes and biological process.But physical chemistry method processing cost is higher, be generally used for pre-treatment or the advanced treatment of percolate.Mainly adopt at present biological process treating refuse percolate.Yet traditional biological treatment denitrogenation, the additional carbon that the not only more difficult cleanup standard that reaches, and denitrification adds has also increased processing cost.Therefore how to process cost-effectively the Focal point and difficult point of percolate ，Shi China's water treatment aspect.
At present, for biological denitrificaion, many novel procesies have been reported, as anaerobic ammonia oxidation process.According to Anammox reaction, anaerobic ammonia oxidizing bacteria can be converted into nitrogen by ammonia nitrogen and nitrite nitrogen.Because anaerobic ammonia oxidizing bacteria belongs to anaerobism autotrophic bacteria, reaction process is without oxygen and organism, thus can save 50% oxygen supply expense and a large amount of organic carbon sources, thus also greatly reduced processing costs and the capital cost of sewage disposal.Yet the large amount of organic containing in percolate can have a negative impact to anaerobic ammonia oxidizing bacteria, Anammox reaction simultaneously can produce a certain amount of nitric nitrogen, causes system water outlet still to also have nitric nitrogen, affects the nitric efficiency of system.These are all anaerobic ammonia oxidation process application urgent problems.
Summary of the invention
For the weak point of above-mentioned technology, the invention provides a kind of device and method, can solve the problem of landfill leachate depth denitrification difficulty.
The control device that short distance nitration associating Anammox is processed landfill leachate depth denitrification, is characterized in that:
The first sbr reactor device 9 inside are provided with agitator
sBR110, pH sensor
sBR111, DO sensor
sBR112 and ORP sensor
sBR113; The first sbr reactor device 9 also connects aeration head 6, air compressor simultaneously
sBR17 and gas meter 8; The second sbr reactor device 74 inside are provided with agitator
sBR228, pH sensor
sBR229 and DO sensor
sBR230; The second sbr reactor device 74 also connects aeration head 6, air compressor simultaneously
sBR220 and gas meter 8; ASBR reactor 42 inside are provided with agitator
aSBR41 and pH sensor
aSBR39; PH sensor
sBR111, DO sensor
sBR112, ORP sensor
sBR113, pH sensor
sBR229, DO sensor
sBR230 and pH sensor
aSBR39 through data line respectively with pH determinator
sBR111, DO determinator
sBR112, ORP determinator
sBR113, pH determinator
sBR229, DO determinator
sBR230 and pH determinator
aSBRafter 39 connections, be connected with the data signal input interface 49 of computer 48, computer 48 is connected with process controller 55 by data signal output interface, the intake pump of process controller
sBR1rly., inlet valve
sBR1rly., agitator
sBR1rly., air compressor
sBR1rly., flowing water Valve
sBR1rly., intake pump
sBR2rly., inlet valve
sBR2rly., agitator
sBR2rly., air compressor
sBR2rly., intake pump
the second intermediate water tankrly., inlet valve
the second intermediate water tankrly., flowing water Valve
sBR2rly., intake pump
aSBRrly., inlet valve
aSBRrly., agitator
aSBRrly., flowing water Valve
aSBRrly., ASBR reactor return valve rly., ASBR reactor reflux pump rly. respectively with intake pump
sBR13, inlet valve
sBR15, agitator
sBR110, air compressor
sBR17, flowing water Valve
sBR117, intake pump
sBR221, inlet valve
sBR222, agitator
sBR228, air compressor
sBR220, intake pump
the second intermediate water tank23, inlet valve
the second intermediate water tank24, flowing water Valve
sBR231, intake pump
aSBR37, inlet valve
aSBR38, agitator
aSBR41, flowing water Valve
aSBR44, ASBR reactor return valve 45, ASBR reactor reflux pump 47 connect.
Technical problem to be solved by this invention is to provide the control method of short distance nitration associating Anammox treating refuse percolate advanced nitrogen, comprising:
A1, the time controller of the water inlet of the first sbr reactor device in real-time control system carries out timing, after system starts, intake pump
sBR1with water inlet pipe valve
sBR1automatically open, the mixed solution in inlet chest injected to the first sbr reactor device, when the flooding quantity of sbr reactor device reach sbr reactor device volume 50% time, intake pump
sBR1with water inlet pipe valve
sBR1automatically close water inlet end;
A2, after water inlet end, agitator
sBR1automatically open, the first sbr reactor device enters anoxic denitrification process in whipping process, and anoxic denitrification process is by online ORP sensor
sBR1monitoring, and in real time obtained data information transfer is arrived to computer by data collecting card, the first order derivative that the condition that anoxic denitrification completes in the first sbr reactor device is ORP sports by be greater than-25mv/min be less than-30mv/min, and churning time t is greater than 2h, air compressor SBR1 opens automatically;
A3, air compressor
sBR1automatically, after opening, air is diffused in the first sbr reactor device through aeration tube and aeration head, enters the organic matter removal stage, by pH sensor
sBR1pH value in monitoring water, by pH determinator
sBR1data are input in the middle of computer by data collecting card, and data are as the real-time control parameter of organic matter removal; The condition that organic matter removal completes in the first sbr reactor device be pH first order derivative by just becoming negative, and aeration time t is while being greater than 3h, finishes organic matter removal process, air compressor
sBR1and agitator
sBR1automatically close;
A4, the sedimentation time of the first sbr reactor device, carries out timing by the time controller in real-time control system, starts draining after reaching 1h, and water discharge time carries out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
sBR1, the water after processing is through rising pipe
sBR1enter the first intermediate water tank, when water displacement reach the first sbr reactor device volume 50% after, rising pipe valve
sBR1automatically close;
A5, after draining finishes, system enters the A1 of next cycle automatically;
B1, in the first intermediate water tank, the first sbr reactor device water outlet of 60% enters the second sbr reactor device, and 40% enters the second intermediate water tank.The time controller of the water inlet of the second sbr reactor device in real-time control system carries out timing, after system starts, and intake pump
sBR2with water inlet pipe valve
sBR2automatically open, the first sbr reactor device water outlet of 60% in the first intermediate water tank is injected to the second sbr reactor device.After in the first intermediate water tank, the first sbr reactor device water outlet of 60% is discharged, intake pump
sBR2with water inlet pipe valve
sBR2automatically close water inlet end.Subsequently, the first sbr reactor device water outlet of the first intermediate water tank 40% enters the second intermediate water tank, and the time controller of its time in real-time control system carries out timing, intake pump
the second intermediate water tankwith water inlet pipe valve
the second intermediate water tankautomatically open, the first sbr reactor device water outlet of 40% in the first intermediate water tank is injected to the second intermediate water tank.After the first sbr reactor device water outlet in the first intermediate water tank is drained, intake pump
the second intermediate water tankwith water inlet pipe valve
the second intermediate water tankautomatically close water inlet end;
B2, after water inlet end, agitator
sBR2and air compressor
sBR2automatically open, air is diffused in the second sbr reactor device through aeration tube and aeration head, and the second sbr reactor device enters aerobic short distance nitration process in aeration, and aerobic short distance nitration process is by online pH sensor
sBR2with DO sensor
sBR2monitor respectively pH value and dissolved oxygen concentration DO in water, by pH determinator
sBR2with DO determinator
sBR2data are input in the middle of computer by data collecting card, and data are as the real-time control parameter of short distance nitration; When the nitrated condition completing of the second sbr reactor device medium or short range be pH first order derivative by just becoming negative, and aeration time t is greater than 6h, when DO is greater than 2mg/L simultaneously, finishes short distance nitration process, air compressor
sBR2and agitator
sBR2automatically close;
B3, the second sbr reactor device precipitation is carried out timing by the time controller in real-time control system, draining after reaching 1h, the time is carried out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
sBR2, the water after processing is through rising pipe
sBR2enter the second intermediate water tank, when water displacement reach the second sbr reactor device volume 30% after rising pipe valve
sBR2automatically close;
B4, after draining finishes, system enters the B1 of next cycle automatically;
C1, the time controller of the water inlet of ASBR reactor in real-time control system carries out timing, after system starts, intake pump
aSBRwith water inlet pipe valve
aSBRautomatically open, the mixed solution in the second intermediate water tank injected to ASBR reactor, when flooding quantity reach ASBR reactor volume 50% after, intake pump
aSBRwith water inlet pipe valve
aSBRautomatically close water inlet end;
C2, after water inlet end, agitator
aSBRautomatically open, ASBR reactor enters Anammox reaction in whipping process, and Anammox reaction process is by online pH sensor
aSBRmonitoring, and by data collecting card in real time by obtained data information transfer to computer, the condition that Anammox has reacted in described ASBR reactor be pH first order derivative by just becoming negative, and churning time t is while being greater than 6h, agitator
aSBRautomatically close;
C3, ASBR reactor precipitation is carried out timing by the time controller in real-time control system, after reaching 1h, 50% water after processing is discharged, and 70% of water outlet is back to raw water box.First effluent recycling is carried out to timing by the time controller in real-time control system, system is opened rising pipe valve automatically
aSBR, the water after processing enters inlet chest through return line, when effluent recycling amount reach ASBR reactor volume 35% time, rising pipe valve
aSBRautomatically close; Residue water outlet is discharged and is carried out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
aSBR, when discharge the water yield reach ASBR reactor 15% time, rising pipe valve
aSBRautomatically close;
C4, after draining finishes, system enters the C1 of next cycle automatically;
In sum, the invention provides short distance nitration associating Anammox to the control method of landfill leachate depth denitrification and device, take city garbage percolate as research object, first by denitrification and the preaeration of the first sbr reactor device, carry out the removal of organism and nitrogen, the part water outlet of the first sbr reactor device is processed through the short distance nitration of the second sbr reactor device again, the water outlet of final the first sbr reactor device and the second sbr reactor device in proportion 1:1.3 enters ASBR reactor and carries out Anammox reaction and realize advanced nitrogen after mixing, while ASBR effluent recycling, make the nitric nitrogen producing can utilize the organic carbon source in former water to remove by denitrification, improved the denitrification percent of system.System influent ammonium concentration is 2000 ± 100mg/L, and water outlet ammonia nitrogen and nitrite nitrogen be all lower than 10mg/L, the about 60mg/L of total nitrogen left and right, and under the condition of additional carbon not, system denitrification percent reaches more than 95%.Whole system is not being added under the condition of any organic carbon source, has realized the object of percolate being carried out to advanced nitrogen.
Accompanying drawing explanation
Fig. 1 is the structural representation of short distance nitration associating Anammox of the present invention to landfill leachate depth denitrification control device;
Fig. 2 is the schematic flow sheet of short distance nitration associating Anammox of the present invention to A1～A5 in landfill leachate depth denitrification control method;
Fig. 3 is the schematic flow sheet of short distance nitration associating Anammox of the present invention to B1～B4 in landfill leachate depth denitrification control method;
Fig. 4 is the schematic flow sheet of short distance nitration associating Anammox of the present invention to C1～C4 in landfill leachate depth denitrification control method;
Typical ORP and pH Changing Pattern schematic diagram in the first sbr reactor device operational process in Fig. 5 specific embodiment of the invention;
Fig. 6 is typical pH Changing Pattern schematic diagram in the second sbr reactor device operational process in the specific embodiment of the invention;
Fig. 7 is typical pH Changing Pattern schematic diagram in ASBR reactor operational process in the specific embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Shown in Fig. 1, the invention provides the structural representation of short distance nitration associating Anammox to landfill leachate depth denitrification control device.Inlet chest 2 is connected the first sbr reactor device 9 with inlet valve SBR15 by water inlet pipe SBR14, intake pump SBR13; The first sbr reactor device 9 is connected the first intermediate water tank 19 with flowing water Valve SBR117 by rising pipe SBR118; The first intermediate water tank 19 is connected with the second sbr reactor device 74 with inlet valve SBR222 by water inlet pipe SBR234, intake pump SBR221, and the first intermediate water tank 19 is also connected with the second intermediate water tank 33 with inlet valve the second intermediate water tank 24 by water inlet pipe the second intermediate water tank 35, intake pump the second intermediate water tank 23 simultaneously; The second sbr reactor device 74 is connected with the second intermediate water tank 33 with flowing water Valve SBR231 by rising pipe SBR232; The second intermediate water tank 33 is connected with ASBR reactor 42 with inlet valve ASBR38 by water inlet pipe ASBR36, intake pump ASBR37; ASBR reactor 42 connects rising pipe ASBR43 and flowing water Valve ASBR44, and ASBR reactor 42 is also connected with water tank inlet 2 with ASBR reactor reflux pump 47 by ASBR reactor return valve 45, ASBR reactor return line 46 simultaneously.
The first sbr reactor device 9 inside are provided with agitator
sBR110, pH sensor
sBR111, DO sensor
sBR112 and ORP sensor
sBR113; The first sbr reactor device 9 also connects aeration head 6, air compressor simultaneously
sBR17 and gas meter 8.The second sbr reactor device 74 inside are provided with agitator
sBR228, pH sensor
sBR229 and DO sensor
sBR230; The second sbr reactor device 74 also connects aeration head 6, air compressor simultaneously
sBR220 and gas meter 8.ASBR reactor 42 inside are provided with agitator
aSBR41 and pH sensor
aSBR39.PH sensor
sBR111, DO sensor
sBR112, ORP sensor
sBR113, pH sensor
sBR229, DO sensor
sBR230 and pH sensor
aSBR39 through data line respectively with pH determinator
sBR111, DO determinator
sBR112, ORP determinator
sBR113, pH determinator
sBR229, DO determinator
sBR230 and pH determinator
aSBRafter 39 connections, be connected with the data signal input interface 49 of computer 48, computer 48 is connected with process controller 55 by data signal output interface, the intake pump of process controller
sBR1rly., inlet valve
sBR1rly., agitator
sBR1rly., air compressor
sBR1rly., flowing water Valve
sBR1rly., intake pump
sBR2rly., inlet valve
sBR2rly., agitator
sBR2rly., air compressor
sBR2rly., intake pump
the second intermediate water tankrly., inlet valve
the second intermediate water tankrly., flowing water Valve
sBR2rly., intake pump
aSBRrly., inlet valve
aSBRrly., agitator
aSBRrly., flowing water Valve
aSBRrly., ASBR reactor return valve rly., ASBR reactor reflux pump rly. respectively with intake pump
sBR13, inlet valve
sBR15, agitator
sBR110, air compressor
sBR17, flowing water Valve
sBR117, intake pump
sBR221, inlet valve
sBR222, agitator
sBR228, air compressor
sBR220, intake pump
the second intermediate water tank23, inlet valve
the second intermediate water tank24, flowing water Valve
sBR231, intake pump
aSBR37, inlet valve
aSBR38, agitator
aSBR41, flowing water Valve
aSBR44, ASBR reactor return valve 45, ASBR reactor reflux pump 47 connect.
With reference to Figure 2 shows that the schematic flow sheet of short distance nitration associating Anammox to A1～A5 in landfill leachate depth denitrification control method, specifically comprise:
A1, the time controller of the water inlet of the first sbr reactor device in real-time control system carries out timing, after system starts, intake pump
sBR1with water inlet pipe valve
sBR1automatically open, the mixed solution in inlet chest injected to the first sbr reactor device, when the flooding quantity of sbr reactor device reach sbr reactor device volume 50% time, intake pump
sBR1with water inlet pipe valve
sBR1automatically close water inlet end;
A2, after water inlet end, agitator
sBR1automatically open, the first sbr reactor device enters anoxic denitrification process in whipping process, and anoxic denitrification process is by online ORP sensor
sBR1monitoring, and in real time obtained data information transfer is arrived to computer by data collecting card, the first order derivative that the condition that anoxic denitrification completes in the first sbr reactor device is ORP sports by be greater than-25mv/min be less than-30mv/min, and churning time t is greater than 2h, air compressor SBR1 opens automatically;
A3, air compressor
sBR1automatically, after opening, air is diffused in the first sbr reactor device through aeration tube and aeration head, enters the organic matter removal stage, by pH sensor
sBR1pH value in monitoring water, by pH determinator
sBR1data are input in the middle of computer by data collecting card, and data are as the real-time control parameter of organic matter removal; The condition that organic matter removal completes in the first sbr reactor device be pH first order derivative by just becoming negative, and aeration time t is while being greater than 3h, finishes organic matter removal process, air compressor
sBR1and agitator
sBR1automatically close;
A4, the sedimentation time of the first sbr reactor device, carries out timing by the time controller in real-time control system, starts draining after reaching 1h, and water discharge time carries out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
sBR1, the water after processing is through rising pipe
sBR1enter the first intermediate water tank, when water displacement reach the first sbr reactor device volume 50% after, rising pipe valve
sBR1automatically close;
A5, after draining finishes, system enters the A1 of next cycle automatically;
With reference to Figure 3 shows that the schematic flow sheet of short distance nitration associating Anammox to B1～B4 in landfill leachate depth denitrification control method, specifically comprise:
B1, in the first intermediate water tank, the first sbr reactor device water outlet of 60% enters the second sbr reactor device, and 40% enters the second intermediate water tank.The time controller of the water inlet of the second sbr reactor device in real-time control system carries out timing, after system starts, and intake pump
sBR2with water inlet pipe valve
sBR2automatically open, the first sbr reactor device water outlet of 60% in the first intermediate water tank is injected to the second sbr reactor device.After in the first intermediate water tank, the first sbr reactor device water outlet of 60% is discharged, intake pump
sBR2with water inlet pipe valve
sBR2automatically close water inlet end.Subsequently, the first sbr reactor device water outlet of the first intermediate water tank 40% enters the second intermediate water tank, and the time controller of its time in real-time control system carries out timing, intake pump
the second intermediate water tankwith water inlet pipe valve
the second intermediate water tankautomatically open, the first sbr reactor device water outlet of 40% in the first intermediate water tank is injected to the second intermediate water tank.After the first sbr reactor device water outlet in the first intermediate water tank is drained, intake pump
the second intermediate water tankwith water inlet pipe valve
the second intermediate water tankautomatically close water inlet end;
B2, after water inlet end, agitator
sBR2and air compressor
sBR2automatically open, air is diffused in the second sbr reactor device through aeration tube and aeration head, and the second sbr reactor device enters aerobic short distance nitration process in aeration, and aerobic short distance nitration process is by online pH sensor
sBR2with DO sensor
sBR2monitor respectively pH value and dissolved oxygen concentration DO in water, by pH determinator
sBR2with DO determinator
sBR2data are input in the middle of computer by data collecting card, and data are as the real-time control parameter of short distance nitration; When the nitrated condition completing of the second sbr reactor device medium or short range be pH first order derivative by just becoming negative, and aeration time t is greater than 6h, when DO is greater than 2mg/L simultaneously, finishes short distance nitration process, air compressor
sBR2and agitator
sBR2automatically close;
B3, the second sbr reactor device precipitation is carried out timing by the time controller in real-time control system, draining after reaching 1h, the time is carried out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
sBR2, the water after processing is through rising pipe
sBR2enter the second intermediate water tank, when water displacement reach the second sbr reactor device volume 30% after rising pipe valve
sBR2automatically close;
B4, after draining finishes, system enters the B1 of next cycle automatically;
With reference to Figure 4 shows that the schematic flow sheet of short distance nitration associating Anammox to C1～C4 in landfill leachate depth denitrification control method, specifically comprise:
C1, the time controller of the water inlet of ASBR reactor in real-time control system carries out timing, after system starts, intake pump
aSBRwith water inlet pipe valve
aSBRautomatically open, the mixed solution in the second intermediate water tank injected to ASBR reactor, when flooding quantity reach ASBR reactor volume 50% after, intake pump
aSBRwith water inlet pipe valve
aSBRautomatically close water inlet end;
C2, after water inlet end, agitator
aSBRautomatically open, ASBR reactor enters Anammox reaction in whipping process, and Anammox reaction process is by online pH sensor
aSBRmonitoring, and by data collecting card in real time by obtained data information transfer to computer, the condition that Anammox has reacted in described ASBR reactor be pH first order derivative by just becoming negative, and churning time t is while being greater than 6h, agitator
aSBRautomatically close;
C3, ASBR reactor precipitation is carried out timing by the time controller in real-time control system, after reaching 1h, 50% water after processing is discharged, and 70% of water outlet is back to raw water box.First effluent recycling is carried out to timing by the time controller in real-time control system, system is opened rising pipe valve automatically
aSBR, the water after processing enters inlet chest through return line, when effluent recycling amount reach ASBR reactor volume 35% time, rising pipe valve
aSBRautomatically close; Residue water outlet is discharged and is carried out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
aSBR, when discharge the water yield reach ASBR reactor 15% time, rising pipe valve
aSBRautomatically close;
C4, after draining finishes, system enters the C1 of next cycle automatically;
Below in conjunction with example, scheme described in the present invention is further introduced.The percolate of certain refuse landfill of take is research object, has moved continuously 90 days, has obtained stable operating performance.
Parameter setting: the first sbr reactor device: flooding time is 3min, sedimentation time is 1h, water discharge time is 5min; Churning time is by online ORP sensor
sBR1with pH sensor
sBR1real-Time Monitoring, ORP and pH Changing Pattern specifically can be referring to Fig. 5, and process controller obtains characterizing after the signal that denitrification completes, start aeration, aeration time is by online pH sensor Real-Time Monitoring, and process controller obtains characterizing after the signal that organic matter removal completes, and stops aeration and stirring;
The second sbr reactor device: flooding time is 3min, sedimentation time is 1h, and water discharge time is 5min, and aeration time and churning time are by online pH sensor
sBR2, and DO sensor
sBR2real-Time Monitoring, process controller obtains characterizing after the signal that short distance nitration finishes, and stops aeration and stirring; Typical pH, Changing Pattern schematic diagram is referring to Fig. 6.
ASBR reactor: flooding time is 6h, sedimentation time is 1h, and water discharge time is 5min, and churning time is by online pH sensors A SBR Real-Time Monitoring, and process controller obtains characterizing after the signal of Anammox reaction end, stops stirring; Typical pH Changing Pattern schematic diagram is referring to Fig. 7.
The performance of the first sbr reactor device: the first sbr reactor device draining ratio is 0.5, operating temperature is 25 ℃, MLSS:6000 ± 500mg/L, sludge age SRT endless, influent COD is 2000 ± 200mg/L, water outlet COD remains on 1100 ± 100mg/L, clearance is 45 ± 5%, water inlet nitrate is 18 ± 1mg/L, and water outlet nitrate maintains 2 ± 0.5mg/L, utilizes former water carbon source denitrification to remove nitric nitrogen and reaches more than 85%.
The performance of the second sbr reactor device: the second sbr reactor device draining ratio is 0.3, and operating temperature is 25 ℃, MLSS:5000 ± 500mg/L, sludge age SRT endless, influent ammonia nitrogen is 800 ± 50mg/L, and water outlet nitrite nitrogen concentration is 800 ± 50mg/L, and short distance nitration rate reaches more than 95%.
ASBR performance: the ASBR cycle of operation is not fixedly less than 24 hours, draining ratio is 0.5, operating temperature is 30 ℃, MLSS:7000 ± 500mg/L, influent ammonia nitrogen and nitrite nitrogen concentration are respectively 400 ± 50mg/L and 500 ± 50mg/L, and water outlet ammonia nitrogen and nitrite nitrogen are all less than 10mg/L, and clearance is all more than 95%, water outlet nitrate is 60 ± 5mg/L, and nitrogen removal rate is more than 90%.
The performance of system: system influent COD is at 2000 ± 200mg/L, water outlet COD is at 1500 ± 100mg/L, clearance 25%; The TN of water inlet is 2000 ± 100mg/L, and water outlet TN is at 60 ± 5mg/L, and clearance, more than 95%, has been realized the degree of depth of total nitrogen and removed in the situation that not adding outer carbon source.
Further, know-why of the present invention is specially:
The water inlet of the first sbr reactor device is the mixed solution of former water and ASBR effluent recycling liquid, after water inlet, first carry out anoxia stirring, can utilize the organic carbon source in former water that the nitric nitrogen denitrification in ASBR effluent recycling liquid is removed, utilized more fully the organic carbon source in former water, avoided the waste of carbon source simultaneously.In denitrification process, denitrifying bacterium utilizes NO
2 --N is electron acceptor(EA), and organism is electron donor, by NO
2 --N is reduced to N
2, oxidation state material in reactor is constantly reduced, ORP value can constantly decline, and after denitrification finishes, reactor is in anaerobic state, and ORP declines rapidly, now occurs unique point A.Denitrification finishes rear beginning aeration and only carries out organic removal.In mature leachate, contain a small amount of organism and a large amount of ammonia nitrogens, and organism can produce adverse influence to follow-up Anammox reaction.Owing to only carrying out organic removal in the first sbr reactor device, in organic matter removal reaction process, the CO of generation
2by stripping, make pH increase, the nitration reaction of carrying out after organic matter removal can consume basicity declines pH, now there will be unique point B.According to above unique point, can judge exactly the reaction process of denitrification and organic matter removal, after denitrification finishes to complete with organic matter removal, stop stirring and aeration, avoid the oxidation of ammonia nitrogen.
The water inlet of the second sbr reactor device derives from the water outlet of the first sbr reactor device, and its Main Function is that the water outlet of the first sbr reactor device is carried out to short distance nitration, for follow-up Anammox reaction provides nitrite nitrogen matrix.After the second sbr reactor device water inlet, start aeration and stirring, under the associating restraining effect of high free ammonia FA and high free nitrous acid FNA, the second sbr reactor device has been realized short distance nitration, the oxidation state nitrogen of its water outlet is mainly existed with nitrite nitrogen form, nitrate nitrogen content is extremely low, for follow-up ASBR reactor provides nitrite nitrogen matrix.Because nitration reaction can consume basicity, pH is declined, CO after nitrated end
2stripping effect make pH occur increase, therefore there is unique point C.
The water inlet of ASBR reactor is the mixed solution of the first sbr reactor device water outlet and the second sbr reactor device water outlet, and this mixed solution is mixed by the 40% and second sbr reactor device water outlet of the first sbr reactor device water outlet.Owing to having carried out organic removal in the first sbr reactor device, so time organism very little on the impact of Anammox, ASBR reactor can maintain the reaction of good Anammox.Because ASBR reactor adopts continuously, intake, the basicity that Anammox reaction is produced is neutralized, and in reactor, pH remains unchanged substantially, and reaction finishes rear pH meeting slow decreasing, now occurs unique point D.Through Anammox reaction, nitrogens most in former water remove the form with nitrogen from reactor, realize denitrogenation completely truly.
Advantage of the present invention is, whole reactive system is in the first sbr reactor device, the second sbr reactor device and ASBR reactor, the nitrite nitrogen that utilizes original ammonia nitrogen in percolate and short distance nitration to produce, the Anammox technology of application autotrophic denitrification is carried out advanced nitrogen processing to percolate, further denitrogenation refluxes the water outlet of ASBR reactor 70% simultaneously, save energy not only, and without additional carbon, just can deviate from most of total nitrogen, greatly reduce processing costs and the capital cost of sewage disposal.System influent ammonium concentration 2000 ± 100mg/L, water outlet ammonia nitrogen and nitrite nitrogen are all lower than 10mg/L, and about the about 60mg/L of total nitrogen, under the condition of not adding outer carbon source, system denitrification percent reaches more than 95%.
Whole system is controlled in real time by online DO, pH and ORP value sensor, accurately judges each elementary reaction terminal, saves reaction times and the energy.Whole technique is completed by process real-time control system, and bookkeeping is convenient, and working cost is lower, system anti impulsion load and difficult generation sludge bulking.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. the control device that short distance nitration associating Anammox is processed landfill leachate depth denitrification, is characterized in that:
Inlet chest (2) passes through water inlet pipe
sBR1(4), intake pump
sBR1and inlet valve (3)
sBR1(5) connect the first sbr reactor device (9); The first sbr reactor device (9) passes through rising pipe
sBR1and flowing water Valve (18)
sBR1(17) connect the first intermediate water tank (19); The first intermediate water tank (19) passes through water inlet pipe
sBR2(34), intake pump
sBR2and inlet valve (21)
sBR2(22) be connected with the second sbr reactor device (74), the first intermediate water tank (19) also passes through water inlet pipe simultaneously
the second intermediate water tank(35), intake pump
the second intermediate water tankand inlet valve (23)
the second intermediate water tank(24) be connected with the second intermediate water tank (33); The second sbr reactor device (74) passes through rising pipe
sBR2and flowing water Valve (32)
sBR2(31) be connected with the second intermediate water tank (33); The second intermediate water tank (33) passes through water inlet pipe
aSBR(36), intake pump
aSBRand inlet valve (37)
aSBR(38) be connected with ASBR reactor (42); ASBR reactor (42) connects rising pipe
aSBRand flowing water Valve (43)
aSBR(44), ASBR reactor (42) is also connected with water tank inlet (2) with ASBR reactor reflux pump (47) by ASBR reactor return valve (45), ASBR reactor return line (46) simultaneously;
The first sbr reactor device (9) inside is provided with agitator
sBR1(10), pH sensor
sBR1(11), DO sensor
sBR1and ORP sensor (12)
sBR1(13); The first sbr reactor device (9) also connects aeration head (6), air compressor simultaneously
sBR1and gas meter (8) (7); The second sbr reactor device (74) inside is provided with agitator
sBR2(28), pH sensor
sBR2and DO sensor (29)
sBR2(30); The second sbr reactor device (74) also connects aeration head (6), air compressor simultaneously
sBR2and gas meter (8) (20); ASBR reactor (42) inside is provided with agitator
aSBRand pH sensor (41)
aSBR(39); PH sensor
sBR1(11), DO sensor
sBR1(12), ORP sensor
sBR1(13), pH sensor
sBR2(29), DO sensor
sBR2and pH sensor (30)
aSBR(39) through data line respectively with pH determinator
sBR1(11), DO determinator
sBR1(12), ORP determinator
sBR1(13), pH determinator
sBR2(29), DO determinator
sBR2and pH determinator (30)
aSBR(39) after connection, be connected with the data signal input interface (49) of computer (48), computer (48) is connected with process controller (55) by data signal output interface, the intake pump of process controller
sBR1rly., inlet valve
sBR1rly., agitator
sBR1rly., air compressor
sBR1rly., flowing water Valve
sBR1rly., intake pump
sBR2rly., inlet valve
sBR2rly., agitator
sBR2rly., air compressor
sBR2rly., intake pump
the second intermediate water tankrly., inlet valve
the second intermediate water tankrly., flowing water Valve
sBR2rly., intake pump
aSBRrly., inlet valve
aSBRrly., agitator
aSBRrly., flowing water Valve
aSBRrly., ASBR reactor return valve rly., ASBR reactor reflux pump rly. respectively with intake pump
sBR1(3), inlet valve
sBR1(5), agitator
sBR1(10), air compressor
sBR1(7), flowing water Valve
sBR1(17), intake pump
sBR2(21), inlet valve
sBR2(22), agitator
sBR2(28), air compressor
sBR2(20), intake pump
the second intermediate water tank(23), inlet valve
thetwo
intermediate water tank(24), flowing water Valve
sBR2(31), intake pump
aSBR(37), inlet valve
aSBR(38), agitator
aSBR(41), flowing water Valve
aSBR(44), ASBR reactor return valve (45), ASBR reactor reflux pump (47) connect.
2. application rights requires device described in 1 to carry out the control method that short distance nitration associating Anammox is processed landfill leachate depth denitrification, it is characterized in that step is as follows;
A1, the time controller of the water inlet of the first sbr reactor device in real-time control system carries out timing, after system starts, intake pump
sBR1with water inlet pipe valve
sBR1automatically open, the mixed solution in inlet chest injected to the first sbr reactor device, when the flooding quantity of sbr reactor device reach sbr reactor device volume 50% time, intake pump
sBR1with water inlet pipe valve
sBR1automatically close water inlet end;
A2, after water inlet end, agitator
sBR1automatically open, the first sbr reactor device enters anoxic denitrification process in whipping process, and anoxic denitrification process is by online ORP sensor
sBR1monitoring, and in real time obtained data information transfer is arrived to computer by data collecting card, the first order derivative that the condition that anoxic denitrification completes in the first sbr reactor device is ORP sports by be greater than-25mv/min be less than-30mv/min, and churning time t is greater than 2h, air compressor SBR1 opens automatically;
A3, after air compressor SBR1 opens automatically, air is diffused in the first sbr reactor device through aeration tube and aeration head, enters the organic matter removal stage, by pH sensor
sBR1pH value in monitoring water, by pH determinator
sBR1data are input in the middle of computer by data collecting card, and data are as the real-time control parameter of organic matter removal; The condition that organic matter removal completes in the first sbr reactor device be pH first order derivative by just becoming negative, and aeration time t is while being greater than 3h, finishes organic matter removal process, air compressor
sBR1and agitator
sBR1automatically close;
A4, the sedimentation time of the first sbr reactor device, carries out timing by the time controller in real-time control system, starts draining after reaching 1h, and water discharge time carries out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
sBR1, the water after processing is through rising pipe
sBR1enter the first intermediate water tank, when water displacement reach the first sbr reactor device volume 50% after, rising pipe valve
sBR1automatically close;
A5, after draining finishes, system enters the A1 of next cycle automatically;
B1, in the first intermediate water tank, the first sbr reactor device water outlet of 60% enters the second sbr reactor device, and 40% enters the second intermediate water tank; The time controller of the water inlet of the second sbr reactor device in real-time control system carries out timing, after system starts, and intake pump
sBR2with water inlet pipe valve
sBR2automatically open, the first sbr reactor device water outlet of 60% in the first intermediate water tank is injected to the second sbr reactor device; After in the first intermediate water tank, the first sbr reactor device water outlet of 60% is discharged, intake pump
sBR2with water inlet pipe valve
sBR2automatically close water inlet end; Subsequently, the first sbr reactor device water outlet of the first intermediate water tank 40% enters the second intermediate water tank, and the time controller of its time in real-time control system carries out timing, intake pump
the second intermediate water tankwith water inlet pipe valve
the second intermediate water tankautomatically open, the first sbr reactor device water outlet of 40% in the first intermediate water tank is injected to the second intermediate water tank; After the first sbr reactor device water outlet in the first intermediate water tank is drained, intake pump
the second intermediate water tankwith water inlet pipe valve
the second intermediate water tankautomatically close water inlet end;
B2, after water inlet end, agitator
sBR2and air compressor
sBR2automatically open, air is diffused in the second sbr reactor device through aeration tube and aeration head, and the second sbr reactor device enters aerobic short distance nitration process in aeration, and aerobic short distance nitration process is by online pH sensor
sBR2with DO sensor
sBR2monitor respectively pH value and dissolved oxygen concentration DO in water, by pH determinator
sBR2with DO determinator
sBR2data are input in the middle of computer by data collecting card, and data are as the real-time control parameter of short distance nitration; When the nitrated condition completing of the second sbr reactor device medium or short range be pH first order derivative by just becoming negative, and aeration time t is greater than 6h, when DO is greater than 2mg/L simultaneously, finishes short distance nitration process, air compressor
sBR2and agitator
sBR2automatically close;
B3, the second sbr reactor device precipitation is carried out timing by the time controller in real-time control system, draining after reaching 1h, the time is carried out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
sBR2, the water after processing is through rising pipe
sBR2enter the second intermediate water tank, when water displacement reach the second sbr reactor device volume 30% after rising pipe valve
sBR2automatically close;
B4, after draining finishes, system enters the B1 of next cycle automatically;
C1, the time controller of the water inlet of ASBR reactor in real-time control system carries out timing, after system starts, intake pump
aSBRwith water inlet pipe valve
aSBRautomatically open, the mixed solution in the second intermediate water tank injected to ASBR reactor, when flooding quantity reach ASBR reactor volume 50% after, intake pump
aSBRwith water inlet pipe valve
aSBRautomatically close water inlet end;
C2, after water inlet end, agitator
aSBRautomatically open, ASBR reactor enters Anammox reaction in whipping process, and Anammox reaction process is by online pH sensor
aSBRmonitoring, and by data collecting card in real time by obtained data information transfer to computer, the condition that Anammox has reacted in described ASBR reactor be pH first order derivative by just becoming negative, and churning time t is while being greater than 6h, agitator
aSBRautomatically close;
C3, ASBR reactor precipitation is carried out timing by the time controller in real-time control system, after reaching 1h, 50% water after processing is discharged, and 70% of water outlet is back to raw water box; First effluent recycling is carried out to timing by the time controller in real-time control system, system is opened rising pipe valve automatically
aSBR, the water after processing enters inlet chest through return line, when effluent recycling amount reach ASBR reactor volume 35% time, rising pipe valve
aSBRautomatically close; Residue water outlet is discharged and is carried out timing by the time controller in real-time control system, and system is opened rising pipe valve automatically
aSBR, when discharge the water yield reach ASBR reactor 15% time, rising pipe valve
aSBRautomatically close;
C4, after draining finishes, system enters the C1 of next cycle automatically.
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| CN103382051B (en) * | 2013-07-06 | 2014-12-03 | 北京工业大学 | Apparatus and method used for enhancing low-temperature bio-nitrification effects |
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