CN101264979B - Method for realizing short distance deep denitrogenation under low temperature - Google Patents
Method for realizing short distance deep denitrogenation under low temperature Download PDFInfo
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Abstract
The invention relates to a method for realizing nitrogenous wastewater biological treatment process, particularly to a method for realizing short distance deep denitrogenation. The inventive method includes a short distance deep denitrogenation starting-up stage, a stabilizing stage and a cooling stage; and comprises the steps of feeding water, aerating, denitrifying, settling, draining, sludge discharging, and idle running. In the short distance deep denitrogenation starting-up stage, the system temperature is 25 DEG C, the mean sludge retention time is 15 days, and the number of operating periods is 90-95; in the stabilizing stage, the system temperature is 25 DEG C, the sludge retention time is 15 days, and the number of operating periods is 60-65; and in the cooling stage, the system temperature is adjusted to 18 DEG C, the sludge retention time is 15 days, and after 30-35 operating periods, the temperature is adjusted to 11 DEG C, and the sludge retention time is 20 days. The inventive method has the advantages of good denitrogenation effect, high degree of automation, low energy consumption, and capability of stable operation under low temperature conditions.
Description
Technical field
The present invention relates to a kind of implementation method of nitrogenous effluent biological treatment, especially can under cold condition, realize the method for short distance deep denitrogenation technology, be applicable to the nitrogenous Industrial Wastewater Treatment and the town sewage advanced treatment of cold district.
Background technology
Along with the develop rapidly of industrial or agricultural, China has accelerated the paces to water environment treatment, and wastewater treatment rate is greatly improved, however the not only not solution of unhurried current water eutrophication problem, and serious day by day trend is arranged.Limiting nutrient material in the water body---nitrogen, phosphorus is the major cause that causes body eutrophication.The biological nitration denitrification is the sewage denitrification method that generally adopts at present.The tradition nitrification is carried out in two steps.At first, ammonia oxidation bacteria (AOB) is converted into nitrite with ammonia nitrogen; Then, by nitrous acid oxidation bacterium (NOB) nitrite is converted into nitrate.Denitrification is in anoxic and exists under the condition of organic carbon source, is nitrogen by denitrifying bacteria with nitrite and nitrate reduction.But when C/N ratio wastewater (as some municipal effluent based on resident living sewage) was hanged down in processing, owing to reasons such as carbon source deficiency or fluctuating temperatures, nitric efficiency was lower.
Temperature is the important ecological factor of active sludge growth, and in certain temperature range, the activity and the temperature of active sludge microorganism are proportional.Most of microorganism is along with the reduction reduced activity of temperature, and for the bio-denitrifying sewage system, optimum temps can react in 10-25 ℃ of scope, but speed is slower in 25-35 ℃ of scope, is lower than 5 ℃ of denitrification reactions and is difficult to carry out.The temperature of urban sewage treatment system is generally about 15-26 ℃, even generally also can not be lower than 8 ℃ at the northern area of cold.But lower temperature is but totally unfavorable to realizing short range biological denitrification.The short range biological denitrification technology is that biological nitrification process is controlled at the ammonia oxidation stage, then directly carries out denitrification, has not only saved NO
2 -The required energy of the further aeration oxidation of-N, and saved denitrification NO
3 -The carbon source that-N process is required.Realize that short-cut nitrification and denitrification has great importance for improving nitric efficiency, the saving energy and carbon source.Generally believe at present the optimum temps that realizes short range biological denitrification in the world at 30-33 ℃, minimum realization temperature should not be lower than 18 ℃ yet.For urban sewage treatment system, low temperature (11-25 ℃) short distance deep denitrogenation had great importance during especially how the municipal wastewater treatment plant of northern area was realized.
SBR technology is the abbreviation of intermittent activated sludge process sewage treatment process, and its treatment unit has only a sbr reactor pond, and steps such as water inlet, reaction, precipitation, draining are all carried out in this reaction tank, are a kind of sewage disposal process by activated sludge process of routine.SBR technology has advantages such as operation scheme is flexible, controllability is good, therefore is the optimised process of research short distance deep denitrogenation implementation method and stability problem.
Summary of the invention
The objective of the invention is to solve the problems of the prior art, and the method that realizes short distance deep denitrogenation under a kind of cold condition is provided.
Method provided by the present invention is divided into three phases, be under 25 ℃ the condition in temperature, realize short distance deep denitrogenation by the method that adopts real-time control, progressively eliminate nitrite-oxidizing bacteria by spoil disposal simultaneously, optimize the microbial species group structure in the reactive system, slowly cooling then, finally realize the short distance deep denitrogenation under the cold condition, concrete steps following (as shown in Figure 1):
1) short distance deep denitrogenation the unloading phase:
The I water inlet is determined flooding time according to flooding quantity, and by controller timing register is set, and starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters the II procedure;
The II aeration is opened air intake valve, start gas blower, reactive system is carried out aeration, system picks up counting simultaneously, after aeration time is greater than 30min, begin to gather the pH value signal by the pH transmitter, the pH value current signal of gathering is through transmitter input analog(ue)digital transformer A/D, convert numerary signal to, with numerary signal input process real-time controller, calculate through filtering and differentiate, when satisfying pH value first order derivative by negative change just and when keeping 10min, or work as aeration time above 480min, characterize nitrifying process when still change point not occurring and finish, convert output signal to current signal through digital analog converter D/A, be conveyed to control topworks, topworks closes gas blower and intake valve, stops aeration;
Oxidative ammonolysis is a reaction of producing acid, and the pH value can descend always in reaction process, produces acid and stop when reaction finishes, because CO
2By a large amount of strippings, the pH value can become rising by decline, according to above unique point, stop aeration, after ammonia oxidizing bacteria produces nitrite because nitrous acid oxidation bacterium must can grow, therefore, if ammonia nitrogen when just oxidation is finished or before stop aeration, nitrite will be accumulated to some extent, use real-time control strategy, both can guarantee that ammonia nitrogen by complete oxidation, had prevented the further oxidation of nitrite again.
III adds the amount that the additional carbon denitrification rule of thumb determines to add carbon source, set the opening time that carbon source adds pump, valve and carbon source that the unlatching carbon source adds on the pipe add pump, reach and close carbon source after time of setting and add pump and carbon source and add valve on the pipe, turn on agitator when adding carbon source, after churning time is greater than 10min, begin to gather the pH value signal by the pH transmitter, and as the real-time controlled variable input controller of anti-nitration reaction process, and in real time the data information transfer that is obtained is handled to computer by data collecting card, finally reach control to churning time, when the pH first order derivative by just becoming negative, and when keeping 10min, or work as churning time above 240min, when still change point not occurring, controller obtains characterizing the signal that denitrification is finished, and closes agitator;
Denitrification process rises so the meeting of pH value is lasting, when denitrification finishes owing to constantly produce basicity, owing to enter the anaerobic fermentation acid phase, so the unique point of decline appears being become by rising in the pH value, judge that according to above unique point anti-nitration reaction finishes, stop to stir.
The IV precipitation is rule of thumb determined the sedimentary time, and carries out timing by the time controller in the process real-time control system, after reaching predefined sedimentation time, enters V road drainage procedure;
It is 10min that water discharge time is set in the V draining, and flowing water Valve is opened, and outside rising pipe was discharged to reactor, draining was closed the valve on the rising pipe after finishing with the water after handling;
The VI spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/15 of the total sludge quantity of system, the mud mean residence time of assurance system is 15 days, when reaching predefined spoil disposal after the time, closes sludge pump;
The idle spoil disposal of VII finishes to begin to be defined as lay-up period to next cycle, after reaching predefined idle mixing time, the cycle index set(ting)value of the entire reaction of system's reading pre-set, if do not reach predefined cycle index, then system by process real-time control system automated cycle from operation I; After the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 90-95 cycle, the nitrosification rate (Asia of system
When reaching 95%-98%, finish the unloading phase of short distance deep denitrogenation;
In this stage, the temperature of reaction of step I to VII is controlled at 25 ℃;
2) steady stage:
Operation I in the unloading phase that I being intake with short distance deep denitrogenation;
The operation II of II aeration in short distance deep denitrogenation the unloading phase;
Operation III in the unloading phase that III adding the additional carbon denitrification with short distance deep denitrogenation;
Operation IV in the unloading phase that IV precipitating with short distance deep denitrogenation;
The operation V of V draining in short distance deep denitrogenation the unloading phase;
The VI spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/12 of the total sludge quantity of system, the mud mean residence time of assurance system is 12 days, when reaching predefined spoil disposal after the time, closes sludge pump;
VII is idle when reaching predefined idle mixing time after, the cycle index set(ting)value of the entire reaction of system's reading pre-set, as if not reaching predefined cycle index, then system by process real-time control system automated cycle from operation I; After the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 60-65 cycle;
In this stage, the temperature of reaction of step I to VII is controlled at 25 ℃;
3) temperature-fall period:
The I water inlet is reduced to 22 ℃ with the operating temperature of system, starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters the II procedure;
The II aeration is with the operation II in the steady stage;
III adds the additional carbon denitrification with the operation III in the steady stage;
The IV precipitation is with the operation IV in the steady stage;
The V draining is with the operation V in the steady stage;
The VI spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/15 of the total sludge quantity of system, the mud mean residence time of assurance system is 15 days, when reaching predefined spoil disposal after the time, closes sludge pump;
VII is idle after reaching predefined idle mixing time, the operation I of system's reading pre-set is to the cycle index set(ting)value of operation VII, if do not reach predefined cycle index, then system by process real-time control system automated cycle from operation I, after the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 30-35 cycle;
The VIII water inlet is reduced to 18 ℃ with the operating temperature of system, starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters next process;
The IX aeration is with the operation II in the steady stage;
X adds outer carbon source denitrification with the operation III in the steady stage;
The XI precipitation is with the operation IV in the steady stage;
The XII draining is with the operation V in the steady stage;
The XIII spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/18 of the total sludge quantity of system, the mud mean residence time of assurance system is 18 days, when reaching predefined spoil disposal after the time, closes sludge pump;
XIV is idle after reaching predefined idle mixing time, the operation VIII of system's reading pre-set is to the cycle index set(ting)value of operation XIV, if do not reach predefined cycle index, then system by process real-time control system automated cycle from operation VIII; After the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 30-35 cycle;
The XV water inlet is reduced to 11 ℃ with the operating temperature of system, starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters next process;
The XVI aeration is with the operation II in the steady stage;
XVII adds the additional carbon denitrification with the operation III in the steady stage;
The XVIII precipitation is with the operation IV in the steady stage;
The XIX draining is with the operation V in the steady stage;
The XX spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/20 of the total sludge quantity of system, the mud mean residence time of assurance system is 20 days, when reaching predefined spoil disposal after the time, closes sludge pump;
XXI is idle when reaching predefined idle mixing time after, and the operation XV of system's reading pre-set is to the cycle index set(ting)value of operation XX, as if not reaching predefined cycle index, then system by process real-time control system automated cycle from operation XV; After the cycle index that reaches predefined entire reaction, system is out of service.
The present invention has following beneficial effect:
1) the present invention has overcome the disadvantageous effect of cold condition for short distance deep denitrogenation, can realize stable short distance deep denitrogenation in 11-35 ℃ temperature range, for short distance deep denitrogenation is further laid a good foundation applying of large-scale wastewater treatment plant.For Beijing and the most of city on the south Beijing, the water temperature in municipal sewage plant winter generally can not be lower than 10-11 ℃, and the Sewage treatment systems temperature is lower than 11 ℃ weather, and summation can be above 20 days in 1 year.That is to say that method provided by the invention can make SBR method short distance deep denitrogenation technology in above geographic steady running in winter.
2) denitrification effect is good, the water outlet ammonia nitrogen less than 1mg/L, total nitrogen less than 5mg/L, in the pollution exhaust criteria of country's promulgation in 2002, to the strict emission control standards of town sewage be the water outlet ammonia nitrogen less than 5mg/L, total nitrogen less than 15mg/L, water outlet ammonia nitrogen of the present invention and total nitrogen are far below the pollution exhaust criteria of country's promulgation.
3) energy conservation and consumption reduction effects is good, and the short-cut nitrification and denitrification technology can be saved 25% aeration energy consumption and 40% additional carbon expense.
4) automatization level height, real-time control strategy based on common transmitter, aerobic aeration and anoxia stirring time in the biological denitrification process be can control flexibly, the not enough caused reaction of aeration or churning time incomplete and aeration or the raising of the long running cost of bringing of churning time and the waste of the energy fundamentally solved.
What 5) agent set adopted is SBR technology, makes organism and nitrogenous compound obtain removing in a reaction tank, has reduced anoxic pond and settling tank etc. and has handled structures, thereby reduced the floor space of initial cost and whole technology.
6) whole technology is finished by the process real-time control system, has bookkeeping conveniently, and expense is low, anti impulsion load is strong and difficult generation sludge bulking.
7) samll cities and towns' municipal effluent or organism, nitrogen content changed the processing of trade effluent greatly during the present invention can be widely used in, and were specially adapted to adopt the sewage work of SBR technology or the sewage work of preparing to adopt SBR technology.
Description of drawings
The real-time control flow chart of Fig. 1, short distance deep denitrogenation technology of the present invention.
The operating temperature figure of short distance deep denitrogenation technology three phases under Fig. 2, the cold condition of the present invention.
The operating performance figure of short distance deep denitrogenation technology three phases under Fig. 3, the cold condition of the present invention.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment
Embodiment
1) short distance deep denitrogenation the unloading phase, by following operation 90 cycles of operation:
With the real life sewage of certain university dependents' district discharging as experimental subjects (pH=6.5-7.8, COD=260-350mg/L, TN=75-80mg/L).Selected sbr reactor device useful volume 15L, the phase processing water yield is 12L weekly, the COD concentration of mixed solution maintains 200-300mg/L, NH in the reactor
4 +-N concentration is at 55-60mg/L, and the unloading phase of short distance deep denitrogenation, by 25 ℃ of temperature control unit control reaction temperature, it is 95% ethanol that additional carbon adopts concentration.The specific operation process in each cycle is as follows:
The sbr reactor device of useful volume 15L is used in the I water inlet, at first open inlet valve, start intake pump pending waste water is injected the sbr reactor device, start agitator, setting flooding time by the process real-time control system is 20 minutes, and the flow of intake pump is 0.6L/min, the 12L of intaking approximately after 20 minutes of intaking, close intake pump, agitator and inlet valve, advance full water after, the sludge concentration in the reactor is 3.5g.L
-1, enter the II procedure;
The II aeration is opened air intake valve, starts gas blower, and initial aeration rate is set at 0.6m
3/ h carries out aeration to reactive system, and the pressurized air that is provided by gas blower enters aerator by inlet pipe, to the efficient oxygen supply of active sludge intermixture, and sewage is fully contacted with the form of micro-bubble with active sludge; After aeration time is greater than 30min, begin to gather the pH value signal by the pH transmitter, the scope of pH is 0～14, respectively corresponding 4～20mA current signal, the pH value current signal of gathering is imported analog(ue)digital transformer A/D through transmitter, convert numerary signal to, and in real time the data information transfer that is obtained is carried out filtering and differentiate processing to computer by data collecting card again, just becoming by negative when satisfying pH value first order derivative, and when keeping 10min, characterize nitrifying process and finish, close gas blower and intake valve, stop aeration, enter subsequent processing;
It is 1.5ml that III additional carbon denitrification is set alcoholic acid throwing amount, valve and ethanol that the unlatching carbon source adds on the pipe add pump, add and close carbon source behind the ethanol 1.5ml and add pump and carbon source and add valve on the pipe, turn on agitator when adding carbon source, after churning time is greater than 10min, begin to gather the pH value signal by the pH transmitter, and in real time the data information transfer that is obtained is handled to computer by data collecting card, finally reach control to churning time, when the pH first order derivative by just becoming negative, and when keeping 10min, controller obtains characterizing the signal that denitrification is finished, close agitator, enter the IV procedure;
The IV precipitation is 1 hour by the time controller in the process real-time control system according to predefined sedimentation time, and inlet valve, air intake valve, water discharging valve and spoil disposal valve are all closed at this moment;
It is 10min that water discharge time is set in the V draining, and flowing water Valve is opened, and the water after the processing is under the effect of gravity, outside rising pipe is discharged to reactor; Draining is closed the valve on the rising pipe after finishing;
Total sludge quantity in the VI sludge drainage system is 52.5g (total sludge quantity=sludge concentration * sludge volume), is starting the short distance deep denitrogenation stage, and control mud mean residence time is 15d, so the phase sludge volume is 1/15 of total sludge quantity, i.e. 3.5g weekly; After the draining, the sludge concentration of compressing through precipitation is increased to 21g/L by 3.5g/L, therefore needs spoil disposal 160ml; The flow of sludge pump is 40mL/min, and be 4min the working time of setting sludge pump, under the process real-time control system is regulated, opens sludge pump, when reaching predefined spoil disposal after the time, closes sludge pump;
The idle spoil disposal of VII finishes to begin to be defined as lay-up period to next cycle; Preestablishing idle mixing time is 1h, reach 1h idle mixing time after, the cycle index set(ting)value of the entire reaction of system's reading pre-set, if do not reach 90 times, then system by process real-time control system automated cycle from operation I; After reaching 90 times, system is out of service.
2) steady stage, move 60 cycles:
The starting condition of this stage operation is identical with short distance deep denitrogenation the unloading phase, and operation sequence I to V is also identical, and different is the VI procedure.
Steady stage control mud mean residence time is 12d, so the phase sludge volume is 1/12 of total sludge quantity, i.e. 4.375g weekly.After the draining, the sludge concentration of compressing through precipitation is increased to 21g/L by 3.5g/L.Therefore need spoil disposal 200ml.The flow of sludge pump is 40mL/min, and be 5min the working time of setting sludge pump, under the process real-time control system is regulated, opens sludge pump, when reaching predefined spoil disposal after the time, closes sludge pump.
Be set at 1h the idle mixing time of steady stage, the cycle index set(ting)value of the entire reaction of system's reading pre-set afterwards, if do not reach 60 times, then system by process real-time control system automated cycle from operation I; After reaching 60 times, system is out of service.
3) temperature-fall period moves 103 cycles, and temperature-fall period as shown in Figure 2.
1. with short distance deep denitrogenation the unloading phase under the identical situation, after temperature is reduced to 22 ℃ by 25 ℃, move 33 cycles in other starting condition.Operation sequence I to V is also identical.Different is the VI procedure.
Control mud mean residence time is 15d, and the phase sludge volume is 1/15 of total sludge quantity, i.e. 3.5g weekly.After the draining, the sludge concentration of compressing through precipitation is increased to 21g/L by 3.5g/L.Therefore need spoil disposal 160ml.The flow of sludge pump is 40mL/min, and be 4min the working time of setting sludge pump, under the process real-time control system is regulated, opens sludge pump, when reaching predefined spoil disposal after the time, closes sludge pump.
Be set at 1h the idle mixing time in this stage, the cycle index set(ting)value of the entire reaction of system's reading pre-set afterwards, if do not reach 33 times, then system by process real-time control system automated cycle from operation I; After reaching 33 times, system is out of service.
2. under the constant situation of other starting condition, after temperature is reduced to 18 ℃ by 22 ℃, move 30 cycles.Operation sequence I to V is also identical.Different is the VI procedure.
Control mud mean residence time is 18d, and the phase sludge volume is 1/18 of total sludge quantity, i.e. 2.92g weekly.After the draining, the sludge concentration of compressing through precipitation is increased to 21g/L by 3.5g/L.Therefore need spoil disposal 140ml.The flow of sludge pump is 40mL/min, and be 3.5min the working time of setting sludge pump, under the process real-time control system is regulated, opens sludge pump, when reaching predefined spoil disposal after the time, closes sludge pump.
Be set at 1h the idle mixing time in this stage, the cycle index set(ting)value of the entire reaction of system's reading pre-set afterwards, if do not reach 30 times, then system by process real-time control system automated cycle from operation I; After reaching 30 times, system is out of service.
3. under the constant situation of other starting condition, after temperature is reduced to 11 ℃ by 18 ℃, move 40 cycles.Operation sequence I to V is also identical.Different is the VI procedure.
Control mud mean residence time is 20d, and the phase sludge volume is 1/20 of total sludge quantity, i.e. 2.635g weekly.After the draining, the sludge concentration of compressing through precipitation is increased to 21g/L by 3.5g/L.Therefore need spoil disposal 120ml.The flow of sludge pump is 40mL/min, and be 3min the working time of setting sludge pump, under the process real-time control system is regulated, opens sludge pump, when reaching predefined spoil disposal after the time, closes sludge pump.
Be set at 1h the idle mixing time in this stage, the cycle index set(ting)value of the entire reaction of system's reading pre-set afterwards, if do not reach 40 times, then system by process real-time control system automated cycle from operation I; After reaching 40 times, system is out of service.
Operation result as shown in Figure 3, the operation result in 253 cycles, total nitrogen is less than 5mg/L, far below the desired total nitrogen concentration of national grade one discharge standard in system's water outlet.The nitrosification rate of simultaneity factor can remain on more than 95% in temperature 11-25 ℃ scope, has reached good short distance deep denitrogenation effect.
Claims (1)
1. a cold condition is realized the method for short distance deep denitrogenation down, it is characterized in that, the unloading phase of comprising short distance deep denitrogenation, steady stage and temperature-fall period, specifically may further comprise the steps:
1) short distance deep denitrogenation the unloading phase:
The I water inlet is determined flooding time according to flooding quantity, and by controller timing register is set, and starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters the II procedure;
The II aeration is opened air intake valve, start gas blower, reactive system is carried out aeration, system picks up counting simultaneously, after aeration time is greater than 30min, begin to gather the pH value signal by the pH transmitter, the pH value current signal of gathering is through transmitter input analog(ue)digital transformer A/D, convert numerary signal to, with numerary signal input process real-time controller, calculate through filtering and differentiate, when satisfying pH value first order derivative by negative change just and when keeping 10min, or work as aeration time above 480min, characterize nitrifying process when still change point not occurring and finish, convert output signal to current signal through digital analog converter D/A, be conveyed to control topworks, topworks closes gas blower and intake valve, stops aeration;
III adds the amount that the additional carbon denitrification rule of thumb determines to add carbon source, set the opening time that carbon source adds pump, valve and carbon source that the unlatching carbon source adds on the pipe add pump, reach and close carbon source after time of setting and add pump and carbon source and add valve on the pipe, turn on agitator when adding carbon source, after churning time is greater than 10min, begin to gather the pH value signal by the pH transmitter, and as the real-time controlled variable input controller of anti-nitration reaction process, and in real time the data information transfer that is obtained is handled to computer by data collecting card, finally reach control to churning time, when the pH first order derivative by just becoming negative, and when keeping 10min, or work as churning time above 240min, when still change point not occurring, controller obtains characterizing the signal that denitrification is finished, and closes agitator;
The IV precipitation is rule of thumb determined the sedimentary time, and carries out timing by the time controller in the process real-time control system, after reaching predefined sedimentation time, enters V road drainage procedure;
It is 10min that water discharge time is set in the V draining, and flowing water Valve is opened, and outside rising pipe was discharged to reactor, draining was closed the valve on the rising pipe after finishing with the water after handling;
The VI spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/15 of the total sludge quantity of system, the mud mean residence time of assurance system is 15 days, when reaching predefined spoil disposal after the time, closes sludge pump;
The idle spoil disposal of VII finishes to begin to be defined as lay-up period to next cycle, after reaching predefined idle mixing time, the cycle index set(ting)value of the entire reaction of system's reading pre-set, if do not reach predefined cycle index, then system by process real-time control system automated cycle from operation I; After the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 90-95 cycle;
In this stage, the temperature of reaction of step I to VII is controlled at 25 ℃;
2) steady stage:
Operation I in the unloading phase that I being intake with short distance deep denitrogenation;
The operation II of II aeration in short distance deep denitrogenation the unloading phase;
Operation III in the unloading phase that III adding the additional carbon denitrification with short distance deep denitrogenation;
Operation IV in the unloading phase that IV precipitating with short distance deep denitrogenation;
The operation V of V draining in short distance deep denitrogenation the unloading phase;
The VI spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/12 of the total sludge quantity of system, the mud mean residence time of assurance system is 12 days, when reaching predefined spoil disposal after the time, closes sludge pump;
VII is idle when reaching predefined idle mixing time after, the cycle index set(ting)value of the entire reaction of system's reading pre-set, as if not reaching predefined cycle index, then system by process real-time control system automated cycle from operation I; After the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 60-65 cycle;
In this stage, the temperature of reaction of step I to VII is controlled at 25 ℃;
3) temperature-fall period:
The I water inlet is reduced to 22 ℃ with the operating temperature of system, starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters the II procedure;
The II aeration is with the operation II in the steady stage;
III adds the additional carbon denitrification with the operation III in the steady stage;
The IV precipitation is with the operation IV in the steady stage;
The V draining is with the operation V in the steady stage;
The VI spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/15 of the total sludge quantity of system, the mud mean residence time of assurance system is 15 days, when reaching predefined spoil disposal after the time, closes sludge pump;
VII is idle after reaching predefined idle mixing time, the operation I of system's reading pre-set is to the cycle index set(ting)value of operation VII, if do not reach predefined cycle index, then system by process real-time control system automated cycle from operation I, after the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 30-35 cycle;
The VIII water inlet is reduced to 18 ℃ with the operating temperature of system, starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters next process;
The IX aeration is with the operation II in the steady stage;
X adds outer carbon source denitrification with the operation III in the steady stage;
The XI precipitation is with the operation IV in the steady stage;
The XII draining is with the operation V in the steady stage;
The XIII spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/18 of the total sludge quantity of system, the mud mean residence time of assurance system is 18 days, when reaching predefined spoil disposal after the time, closes sludge pump;
X IV is idle after reaching predefined idle mixing time, the operation VIII of system's reading pre-set is to the cycle index set(ting)value of operation X IV, if do not reach predefined cycle index, then system by process real-time control system automated cycle from operation VIII; After the cycle index that reaches predefined entire reaction, system is out of service, and predefined cycle index is 30-35 cycle;
X V water inlet is reduced to 11 ℃ with the operating temperature of system, starts intake pump pending waste water is injected the sbr reactor device, after reaching the predefined time, closes intake pump and inlet valve, enters next process;
X VI aeration is with the operation II in the steady stage;
X VII adds the additional carbon denitrification with the operation III in the steady stage;
The XVIII precipitation is with the operation IV in the steady stage;
X IX draining is with the operation V in the steady stage;
X X spoil disposal is rule of thumb set the working time of sludge pump, under the process real-time control system is regulated, opens sludge pump, sludge volume is 1/20 of the total sludge quantity of system, the mud mean residence time of assurance system is 20 days, when reaching predefined spoil disposal after the time, closes sludge pump;
X X I is idle when reaching predefined idle mixing time after, and the operation XV of system's reading pre-set is to the cycle index set(ting)value of operation XX, as if not reaching predefined cycle index, then system by process real-time control system automated cycle from operation XV; After the cycle index that reaches predefined entire reaction, system is out of service.
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| CN102079609B (en) * | 2010-12-03 | 2012-07-04 | 北京工业大学 | Quick start method for short-range deep denitrification by SBR (Sequencing Batch Reactor) process at low temperature |
| CN102583745B (en) * | 2012-03-08 | 2013-12-11 | 天津城市建设学院 | Improved in-situ excess sludge decrement control method through cyclic activated sludge technology |
| CN103482831B (en) * | 2013-09-11 | 2014-11-05 | 北京工业大学 | Method for enriching nitrite nitrogen oxidizing bacteria granule sludge through process control |
| CN104478084B (en) * | 2014-12-08 | 2016-02-17 | 天津城建大学 | A kind of method improving winter low temperature saprobia denitrification denitrogenation |
| CN107032498B (en) * | 2017-06-23 | 2019-02-19 | 长春工程学院 | The method that SBR technique deep denitrification is strengthened in batch water inlet |
| CN109205783B (en) * | 2018-08-31 | 2022-03-01 | 华北水利水电大学 | A-SBR process-based method for treating domestic sewage at low temperature and synchronously decarbonizing, denitrifying and dephosphorizing |
| CN113003704B (en) * | 2019-12-19 | 2022-07-26 | 同济大学 | Method and device for dirt short-cut nitrification |
| CN117566823B (en) * | 2023-12-12 | 2024-04-09 | 江苏裕隆环保有限公司 | Distributed EGA intelligent tank remote intelligent control system for sewage treatment |
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