CN102442724B - Method for processing residual sludge decrement synchronous denitrification - Google Patents
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Abstract
The invention provides a system and a method for processing residual sludge decrement synchronous denitrification, The system is characterized in that a raw water injection mechanism, a sludge injection mechanism, a draining mechanism and a mud discharge mechanism are respectively connected with a main reactor, sidewall of the main reactor is respectively provided with a pH sensor and an ORP sensor which are connected with a controlling device, the top of the main reactor is provided with a temperature control apparatus. The realization steps of the system comprise that the main reactor is inoculated to mixed sludge and adjusted to start the control apparatus, nitrification liquid is injected in the main reactor, slurry in the main reactor is reacted by a stirrer, and determined whether the mud discharge is required or mud change is required, deposited, drained for standby, the set value of the cycle number is determined by a computer. According to the invention, carbon source in residual sludge is discharged for strengthening sewage denitrification and treating phosphorus removal, exploitation and utilization of carbon source completed at same time in same space can be realized, and the cost of sludge disposal in water plant can be simultaneously reduced.
Description
Technical field
The present invention relates to a kind of mud, dirty water living creature processing technique, especially a kind of system and method thereof of handling the excess sludge reduction synchronous denitrification.
Background technology
For all kinds of sewage biological treatment systems, the former water carbon source that considerable part arranged inevitably through the assimilation of microorganism be transferred to excess sludge mutually in, this was caused bigger carbon source demand breach with regard to the denitrification dephosphorization system that lacks carbon source on the one hand originally, need load and the cost of sludge treatment after also having increased on the other hand, thereby, how the carbon source of excess sludge in mutually discharged and be used for strengthening sewage denitrification and dephosphorization and handle, reduce the carbon consumption energy consumption, significant for the sustainable operation scheme of sewage work.
And both at home and abroad in the development and use of excess sludge internal carbon source, all habitually the development and utilization of internal carbon source is separately carried out, its technology focuses on the exploitation of sludge internal carbon source, denitrification denitrogenation or dephosphorization system that carbon source after having developed then needs other elutriation and pipeline transportation to enter routine are used, this class technology operability in actual applications is not strong, and particularly the technological transformation aspect of existing water factory exists bigger technology barrier and economic resistance.In addition, the internal carbon source of developing by independent system its can biochemical usability and by product undistinct as yet to other influences of main body operation, thereby also made obstacle for applying of this type of internal carbon source development technique.
Summary of the invention
Weak point at above-mentioned technology, the invention provides a kind of by the carbon source in the excess sludge is discharged be used for strengthening sewage denitrification, dephosphorization handles, realized at one time with the same space in finish system and the method thereof of processing excess sludge reduction synchronous denitrification of the development and utilization of carbon source.
For achieving the above object, the invention provides a kind of system that handles the excess sludge reduction synchronous denitrification, comprise control device, main reactor, former water injecting mechanism, mud injecting mechanism and drainage mechanism and spoil disposal mechanism, described former water injecting mechanism, described mud injecting mechanism, described drainage mechanism all is connected with described main reactor respectively with described spoil disposal mechanism, sidewall at described main reactor is respectively equipped with pH sensor and the ORP sensor that is connected with described control device, is provided with the temperature control unit for the described main reaction region internal temperature of control at the top of described main reactor.
Described former water injecting mechanism is made of the former pond of nitrification liquid, intake pump and the water inlet pipe that are communicated with successively, and the other end of described water inlet pipe is connected with described main reactor; Described mud injecting mechanism by the storage basin that is communicated with successively, advance dredge pump and advance the mud pipe and constitute, the described the other end that advances the mud pipe is connected with described main reactor, describedly advances dredge pump and also is connected with described control device respectively with described intake pump.
Described drainage mechanism is made of the blowoff basin, wet-pit and the water shoot that are communicated with successively, and the other end of described water shoot is connected with described main reactor, and described wet-pit is connected with described control device; Described spoil disposal mechanism is made of the spoil disposal pond, sludge pump and the shore pipe that are communicated with successively, and the other end of described shore pipe is connected with described main reactor, and described sludge pump is connected with described control device.
Be provided with agitator in described main reactor, described agitator is connected with described control device.
Also be provided with vent valve, water seal arrangement and gas sampling mouth at the top of described main reactor, described vent valve is connected with the gas trap of outside.
In addition, the present invention also provides a kind of method that realizes handling the system of excess sludge reduction synchronous denitrification may further comprise the steps simultaneously:
(1) start-up system, the seed sludge that starts first in the main reactor is mixed according to a certain ratio by the excess sludge of sludge digestion system spoil disposal and municipal effluent biological denitrification system, and debugging also starts control device;
(2) start intake pump, the nitrification liquid in the former pond is injected main reactor, after reaching the predefined time, close intake pump and inlet valve;
(3) open whipping appts, open temperature control unit simultaneously, the mud in the main reactor carries out synchronous fermentation reaction and anti-nitration reaction, and judges whether need main reactor is carried out spoil disposal or changes the mud operation;
(4) stop to stir, and after closing temperature control unit, begin precipitation, reach preestablish sedimentation time after, enter next process;
(5) opening water discharge valve draining, draining finishes, and enters next process;
(6) close water discharge valve, begin to leave unused, 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 from step (2), until reaching predefined idle mixing time, enters next process by the on-line control system automated cycle;
(7) computer is judged the set(ting)value of cycle index, if reach the set(ting)value of the cycle index of predefined entire reaction, it is out of service that then control device makes system automatically, otherwise, then begin to handle from step (2) beginning circulation again.
In step (1), when starting first, the volume of the mixing sludge of inoculating in the main reactor equates with the volume that next draining finishes the back mixing sludge, and makes the reaction zone sludge concentration maintain 10KgMLSS/m after the water finishing into
3About.
In step (3), when agitator begins to stir, unlatching for detection of with the temperature control unit of control main reactor internal temperature, and record pH value and ORP value simultaneously, as the control parameter, judge according to the length of this churning time whether needs carry out spoil disposal to main reactor or change the mud operation with its correlation.
When this churning time surpasses given maximum churning time, think that the excess sludge fermentation capacity in main reactor this moment acquires a certain degree, lost denitrifying capacity, then opened mud valve, the beginning spoil disposal, set the spoil disposal time according to sludge volume, stop after spoil disposal finishes stirring and temperature control unit, open dredge pump and begin into mud, set the into mud time according to advancing the mud amount, finish the mud process of once changing of main reactor, enter step (4); When this churning time during less than given maximum churning time, cross and change the mud operation, directly enter step (4).
Compared with prior art, the present invention has the following advantages:
A kind of excess sludge reduction synchronous denitrification denitrogenation optimization process system and method provided by the invention has the following advantages:
1, improve mud decrement and denitrification denitrogenation performance synchronously: the hydrolysed ferment flora provides carbon source for the denitrification flora, and denitrifying bacteria suppresses and lifting system basicity by removing product, for the former creates more superior yeasting, both collaborative synchronous raisings that can reach mud decrement and denitrification efficient;
2, the excess sludge reduction effect is obvious: excess sludge reduction equals even is better than the anaerobic digester system of routine substantially in the system, and this has reduced follow-up excess sludge largely and has handled the pressure of disposing.
3, automatic controlling level height: by variation tendency indication sludge fermentation and the denitrifying process of pH in the reaction process and ORP, and finish with this draining is advanced by system, advance the accurately control in real time of spoil disposal, set up to reach mud decrement and sludge denitrification degree maximum turns to the purpose course control method for use, improve stability and the handling property of system synchronously.
4, save construction and improvement cost, but generalization is strong: saved internal carbon source and eluriated and the transmission ﹠ distribution process, and can be by preliminary sedimentation tank or sludge thickener simple reformation are realized.
Description of drawings
Fig. 1 is the structure iron for the treatment of system of the present invention;
The schema of Fig. 2 control method of the present invention;
Fig. 3 is the schema of the embodiment of Fig. 2.
Main nomenclature is as follows:
1-main reactor 1.1-water seal arrangement 1.2-tongued and grooved flanges
1.3-vent valve 1.4-gas sampling mouth 1.5-water inlet pipe
1.6-advance mud pipe 1.7-water shoot 1.8-shore pipe
1.9-pH sensor 1.10-temperature control unit 1.11-agitator
1.12-surge tank 1.13-gas collector
1.14-ORP the former pond of sensor 2-3-storage basin
4-blowoff basin 5-spoil disposal pond 6-control device
7-computer 8-intake pump 9-advances dredge pump
10-wet-pit 11-sludge pump 12-loam cake
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
Shown in figure to 1, the invention provides a kind of excess sludge reduction synchronous denitrification denitrogenation optimization process system, comprise control device 6, main reactor 1, former water injecting mechanism, mud injecting mechanism, drainage mechanism and spoil disposal mechanism and computer 7, wherein, control device 6 is connected with computer 7 with former water injecting mechanism, mud injecting mechanism drainage mechanism and spoil disposal mechanism respectively, former water injecting mechanism and mud injecting mechanism are connected with the injection side of main reactor 1, and drainage mechanism and spoil disposal mechanism are connected with the outlet end of main reactor 1.Wherein, main reactor 1 is columniform closed structure, be provided with loam cake 12 at the top of main reactor 1, this loam cake 12 is fixed on the top of main reactor 1 by the tongued and grooved flanges 1.2 that is arranged on its bottom, be provided with at the top of main reactor 1 for detection of with temperature control unit 1.10, vent valve 1.3, gas sampling mouth 1.4 and the water seal arrangement 1.1 of control main reaction region 1 internal temperature, temperature control unit 1.10 can make in the main reaction region 1 temperature accurately control in positive and negative 1 degree centigrade scope.All through the inside of loam cake 12 with tongued and grooved flanges 1.2, water seal arrangement 1.1 is arranged on the top of loam cake 12 for detecting end in vent valve 1.3, gas sampling mouth 1.4 and the temperature control unit 1.10 and fire end.Agitator 1.11 is fixed in above water seal arrangement 1.1 for mechanical cantilever formula agitator, and the motor at its top is connected with control device 6.The top of agitator is through the inside of water seal arrangement 1.1, loam cake 12, tongued and grooved flanges 1.2, and its bottom is arranged in the main reactor 1.The gas that produces in the main reactor 1 enters in the gas collector 1.13 via surge tank 1.12 by vent valve 1.3.
Sidewall at main reactor 1 is provided with pH sensor 1.9 and the ORP sensor 1.14 that is connected with control device 6 respectively, wherein, the end of the end of pH sensor 1.9 and ORP sensor 1.14 is separately positioned on the inside of main reactor 1, and two sensor signals transfer to computer 7 via control device 6.
Former water injecting mechanism and mud injecting mechanism are connected with the injection side of main reactor 1.Wherein, former water injecting mechanism is made of with water inlet pipe 1.5 the former pond 2 that is communicated with successively, intake pump 8, the other end of water inlet pipe 1.5 is connected with the sidewall that main reactor 1 injects side, intake pump 8 is connected with control device 6, and the nitrification liquid in the former pond injects main reactor via intake pump and water inlet pipe.The mud injecting mechanism is made of the storage basin 3 that is communicated with successively, and the other end that advances mud pipe 1.6 is connected with the sidewall of main reactor 1, and the mud in the storage basin advances dredge pump 9 and is connected with control device 6 via advancing dredge pump and advancing mud pipe injection main reactor.
Drainage mechanism and spoil disposal mechanism are connected with the outlet end of main reactor 1.Drainage mechanism is made of with water shoot 1.7 blowoff basin 4 that is communicated with successively, wet-pit 10, the other end of water shoot 1.7 is connected with the sidewall of discharge side in the main reactor 1, wet-pit 10 is connected with control device 6, is carried out in the blowoff basin via water shoot and wet-pit by the water of discharging in the main reactor 1.Spoil disposal mechanism is made of with shore pipe 1.8 the spoil disposal pond 5 that is communicated with successively, sludge pump 11, the other end of shore pipe 1.8 is connected with the sidewall of discharge side in the main reactor 1, sludge pump is connected with control device, is carried out in the spoil disposal pond via shore pipe and sludge pump by the mud of discharging in the main reactor 1.
The present invention also provides a kind of method that realizes handling the system of excess sludge reduction synchronous denitrification may further comprise the steps simultaneously:
(1) start-up system, the seed sludge that starts first in the main reactor is mixed according to a certain ratio by the excess sludge of sludge digestion system spoil disposal and municipal effluent biological denitrification system, and debugging also starts control device;
(2) start intake pump, the nitrification liquid in the former pond injected main reactor, after reaching the predefined time, close intake pump and inlet valve;
(3) open whipping appts, open temperature control unit simultaneously, the mud in the main reactor carries out synchronous fermentation reaction and anti-nitration reaction, and judges whether need main reactor is carried out spoil disposal or changes the mud operation;
(4) stir stopping, and after closing temperature control unit, begin precipitation, reach preestablish sedimentation time after, enter next process;
(5) opening water discharge valve draining, draining finishes, and enters next process;
(6) close water discharge valve, begin to leave unused, 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 from step (2), until reaching predefined idle mixing time, enters next process by the on-line control system automated cycle;
(7) computer is judged the set(ting)value of cycle index, if reach the set(ting)value of the cycle index of predefined entire reaction, it is out of service that then control device makes system automatically, otherwise, then begin to handle from step (2) beginning circulation again.
Wherein, in step 1, when starting first, the mixing of inoculating in the main reactor is injected by the mud injecting mechanism, this dirt mixed soil is mixed according to a certain ratio by the excess sludge of sludge digestion system spoil disposal and municipal effluent biological denitrification system, the volume of the mixing sludge of inoculating in the main reactor equates with the volume that next draining finishes the back mixing sludge, and makes the reaction zone sludge concentration maintain 10KgMLSS/m after the water finishing into
3About, debugging also starts control device, and the correlation parameter that control device is set when starting first is divided into sedimentation time parameter, idle mixing time parameter and systemic circulation number of times.
In step 2, control device is analyzed to determine the required time of water inlet, by former water injecting mechanism is controlled flooding quantity, make the nitrification liquid in the former pond inject main reactor, after reaching the predefined time, close intake pump and inlet valve, finish this operation.
In step 3, the Controlling System turn on agitator is fermented and anti-nitration reaction to the mud in the main reactor, and in turn on agitator, also open temperature control unit, temperature control unit detects and controls the temperature in the main reactor, judge whether main reactor is carried out spoil disposal and changes the mud operation according to the length of this churning time, record pH value and ORP value in the main reactor simultaneously by pH sensor and ORP sensor, and with the absolute value of dpH/dt and ORP as the control parameter, after agitator stir to be opened 10 minutes, begin to judge: when the value of dpH/dt less than 0 and kept 5 minutes, perhaps the ORP value enters next decision condition less than set-point and when keeping 5 minutes.
When this churning time surpasses given maximum churning time, excess sludge fermentation capacity in the main reactor acquires a certain degree at this moment, lose denitrifying capacity, need open spoil disposal mechanism and begin spoil disposal, set the spoil disposal time according to sludge volume, after finishing, spoil disposal stops to stir, and close temperature control unit, and start the mud injecting mechanism and begin into mud, set the into mud time according to advancing the mud amount, finish the mud process of once changing of main reactor, enter step (4); When this churning time during less than given maximum churning time, control device can be crossed automatically and change the mud operation, enters step (4).
In step 4, stopping stirring, and after closing temperature control unit, mud is being precipitated, after reaching predefined sedimentation time, finish this operation, and enter next process.
In step 5, the water discharge valve in the control device control drainage mechanism begins draining, and its water discharge time is identical with flooding time, after draining finishes, finishes this operation, and enters next process.
In step 6, behind the drain shut valve, begin the mixing sludge in the main reactor is left unused, after reaching predefined idle mixing time, finish this operation, and enter next process.
In step 7, computer judges that to the set(ting)value of cycle index if reach the cycle index of predefined entire reaction, then control device makes system out of service automatically; If do not reach predefined cycle index, then control device is begun to handle by step (2) beginning circulation again.
As shown in Figure 3, experimental water is certain university's dependents' district discharging real life sewage nitrification liquid (pH=6.5-7.8 after A/O handles, COD=40-60mg/L, NH4+-N=0.5-2mg/L, NOx--N=60-80mg/L), the experiment seed sludge adopts certain large size city sludge of sewage treatment plant excess sludge that Digestive tract is arranged, and experiment is to serve as SBR denitrogenation pilot test system (SS, the 9830-10335mg/L of processing object with certain university's dependents' district real life sewage with excess sludge; VSS, 8475-8880mg/L; TCOD, 12653-13010mg/L), reactor used useful volume 10L, phase water inlet 6L weekly, mixed solution NOx--N concentration maintains 36-48mg/L in the reactor, and initial sludge concentration is between 9-11g/L in the reactor, sludge age is about 45d, and temperature of reaction is controlled at 35 ℃.Concrete steps are as follows:
(1) start-up system: the seed sludge that starts first in the main reactor is mixed by 1: 3 proportioning by the excess sludge of sludge digestion system spoil disposal and municipal effluent biological denitrification system, when starting first in the reactor sludge volume be 4L, concentration is about 25g/L, the concentration that need guarantee mud in the main reactor maintains 10KgMLSS/m3 behind the water finishing into, debugging also starts Online Processing System, and the correlation parameter that control device is set when starting first is divided into sedimentation time parameter, idle mixing time parameter and systemic circulation number of times;
(2) start intake pump, the nitrification liquid single flooding quantity in the former pond is 6L, and the intake pump flooding quantity is 600ml/ minute, intake 10 minutes, the water inlet process is set by Online Processing System, after reaching the predefined time, close intake pump and inlet valve, enter next process;
(3) the Controlling System turn on agitator is fermented and anti-nitration reaction to the mud in the main reactor, and opening temperature control unit detects and controls the temperature in the main reactor, judge whether main reactor is carried out spoil disposal and changes the mud operation according to the length of this churning time, record pH value and the ORP value of mud simultaneously by pH sensor and ORP sensor, and with the absolute value of dpH/dt and ORP as the control parameter, after agitator stir to be opened 10 minutes, begin to judge: when the value of dpH/dt less than 0 and kept 5 minutes, perhaps the ORP value enters next decision condition less than-400mV and when keeping 5 minutes:
A, when this churning time surpasses given maximum churning time 12h, think that the excess sludge fermentation capacity in this moment acquires a certain degree, lost denitrifying capacity, open mud valve and begin spoil disposal, the single sludge volume is 1/3 to be 3.3L, the spoil disposal time set is 5 minutes, after finishing, spoil disposal stops to stir and closing temperature control unit, open dredge pump and begin into mud, single advances the mud amount and equates with sludge volume, and advancing dredge pump, to advance mud speed be 330ml/ minute, advances 10 minutes mud time, finish and once change the mud process, enter the precipitation operation;
B, when this churning time during less than given maximum churning time 12h, control device is crossed automatically and is changed the mud operation, works being introduced into precipitator's order;
(4) agitator stirs and to stop, and closes temperature control unit, begins mud is precipitated, reach predefined sedimentation time 6h after, precipitation is finished this operation after finishing, and enters next process;
(5) control device control water discharge valve opening water discharge, the single water displacement is 6L, water discharge time 10 minutes, draining is finished this operation after finishing, and enters next process;
(6) close water discharge valve, begin to leave unused, after reaching predefined idle mixing time of 1h, finish this operation, and enter next process;
(7) computer is judged the set(ting)value of cycle index, and after the cycle index that reaches predefined entire reaction 200 times, control device is out of service automatically; If do not reach predefined cycle index (200 times), then control device begins next circular treatment by step (2).
After treatment system of the present invention and disposal methods, final outflow water NOx--N goes out water concentration less than 5mg/L, and the VSS total amount of average VSS decrement 50%, 56.7% is used for denitrification denitrogenation, and the excess sludge denitrifying capacity is up to 0.39gNO3--N/gVSS.
Principle of the present invention is as follows:
The mud decrement synchronous denitrification refers to denitrification process is embedded the sludge anaerobic fermenting process, to replace the terminal process of anaerobically fermenting biochemical reaction chain---and produce methane, form the novel biochemical reaction chain of " acidication-product hydrogen produces acetic acid-denitrification ".On the microbiology angle, be about to denitrifying bacteria and introduce anaerobic fermentation system, utilize denitrifying bacteria to the competitive edge of methanogen, make up the microbial ecological system of hydrolysed ferment flora and denitrification flora cooperative cooperating.And the mud decrement synchronous denitrification system of formation efficient stable, the sludge hydrolytic tunning is directly preferentially utilized by denitrifying bacteria in the system, thereby realizes fermentation denitrification synchronously.The hydrolysed ferment flora provides carbon source for the denitrification flora, and denitrifying bacteria has been created more superior yeasting for the former again, and both synergies can reach the synchronous raising of mud decrement and denitrification efficient.On the basis of above-mentioned principle, the present invention proposes the process control strategy based on pH and ORP parameter, when realizing automatization control, the reactive system performance is further optimized.
The present invention is by being coupled to sludge fermentation and denitrification, realized at one time with the same space in finish the development and utilization of internal carbon source, and cohesive process control method, when improving sludge fermentation denitrification biochemical efficiency, can be to greatest extent the internal carbon source in the excess sludge be used for denitrification denitrogenation, saving by a relatively large margin Sewage Plant carbon consumption and sludge treatment cost.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. method of handling the excess sludge reduction synchronous denitrification, comprise control device, main reactor, former water injecting mechanism, mud injecting mechanism and drainage mechanism and spoil disposal mechanism, described former water injecting mechanism, described mud injecting mechanism, described drainage mechanism all are connected with described main reactor respectively with described spoil disposal mechanism, sidewall at described main reactor is respectively equipped with pH sensor and the ORP sensor that is connected with described control device, is provided with the temperature control unit for the described main reaction region internal temperature of control at the top of described main reactor; Described former water injecting mechanism is made of the former pond of nitrification liquid, intake pump and the water inlet pipe that are communicated with successively; Described drainage mechanism is made of the blowoff basin, wet-pit and the water shoot that are communicated with successively; In described main reactor, be provided with whipping appts;
Its treatment process may further comprise the steps:
(1) start-up system, the seed sludge that starts first in the main reactor is mixed according to a certain ratio by the excess sludge of sludge digestion system spoil disposal and municipal effluent biological denitrification system, and debugging also starts control device;
(2) start intake pump, the nitrification liquid in the former pond is injected main reactor, after reaching the predefined time, close intake pump and inlet valve;
(3) open whipping appts, open temperature control unit simultaneously, the mud in the main reactor carries out synchronous fermentation reaction and anti-nitration reaction, and judges whether need main reactor is carried out spoil disposal or changes the mud operation;
(4) stop to stir, and after closing temperature control unit, begin precipitation, reach preestablish sedimentation time after, enter next process;
(5) opening water discharge valve draining, draining finishes, and enters next process;
(6) close water discharge valve, begin to leave unused, 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 from step (2), until reaching predefined idle mixing time, enters next process by the on-line control system automated cycle;
(7) computer is judged the set(ting)value of cycle index, if reach the set(ting)value of the cycle index of predefined entire reaction, it is out of service that then control device makes system automatically, otherwise, then begin to handle from step (2) beginning circulation again.
2. treatment process according to claim 1, it is characterized in that, in step (1), when starting first, the volume of the mixing sludge of inoculating in the main reactor equates with the volume that next draining finishes the back mixing sludge, and makes the reaction zone sludge concentration maintain 10KgMLSS/m after the water finishing into
3About.
3. treatment process according to claim 1, it is characterized in that, in step (3), when whipping appts begins to stir, unlatching for detection of with the temperature control unit of control main reactor internal temperature, and record pH value and ORP value simultaneously, as the control parameter, judge according to the length of this churning time whether needs carry out spoil disposal to main reactor or change the mud operation with its correlation.
4. treatment process according to claim 3, it is characterized in that, in step (3), when this churning time surpasses given maximum churning time, think that the excess sludge fermentation capacity in main reactor this moment acquires a certain degree, lost denitrifying capacity, then open mud valve, the beginning spoil disposal is set the spoil disposal time according to sludge volume, stops to stir and temperature control unit after spoil disposal finishes, open dredge pump and begin into mud, set the into mud time according to advancing the mud amount, finish the mud process of once changing of main reactor, enter step (4); When this churning time during less than given maximum churning time, cross and change the mud operation, directly enter step (4).
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| CN103043876B (en) * | 2012-12-25 | 2013-11-06 | 北京工业大学 | Method for reinforcing sludge digestion and synchronizing nitrogen and phosphorus removal |
| CN103086511B (en) * | 2012-12-25 | 2014-03-26 | 北京工业大学 | Method for enhancing nitrogen and phosphorus removal of urban sewage by sludge fermentation |
| CN103058374B (en) * | 2013-01-05 | 2014-01-01 | 北京工业大学 | Method for treating high-content ammonia and nitrogen for shortcut nitrification to discharge effluent by coupling simultaneous denitrification of sludge fermentation with autotrophic nitrogen removal |
| CN103145243B (en) * | 2013-01-31 | 2014-05-14 | 北京工业大学 | N2O gas collecting device and method in reaction process of sequencing batch reactor (SBR) method based on process control |
| CN103214156B (en) * | 2013-04-01 | 2014-05-14 | 北京工业大学 | Surplus sludge fermenting and coupling denitrification device and method in condition of low dissolved oxygen |
| CN103663867B (en) * | 2013-12-02 | 2015-01-07 | 北京工业大学 | Device and method of residual sludge alkaline fermentation and inner carbon source development technology coupled with A-A-O nitrogen and phosphorous removal system |
| CN105753157B (en) * | 2016-03-26 | 2018-05-25 | 北京工业大学 | The apparatus and method that excess sludge anaerobic fermentation mixture strengthens city domestic sewage advanced nitrogen dephosphorization by two-stage SBR |
| CN114560556A (en) * | 2021-12-31 | 2022-05-31 | 北京工业大学 | Method for promoting hydrolytic fermentation of excess sludge and simultaneously utilizing fermentation product in situ |
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