CN103601297B - Starting and efficient operating method of normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique - Google Patents
Starting and efficient operating method of normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique Download PDFInfo
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Abstract
The invention relates to a starting and efficient operating method of a normal-temperature high-ammonia-nitrogen completely autotrophic nitrogen-removal over nitrite (CANON) technique, belonging to the field of aquatic environment restoration and regeneration. CANON filter column back flush sludge is inoculated to a reactor, and a biofilm formation stage, a variable substrate starting stage and an efficient operating stage are performed at normal temperature to achieve the level of treating 780-820 mg/L high-ammonia-nitrogen sewage within 150 days; and the average total nitrogen removal load is up to 3.03kg.m<-3>.d<-1>, which is many times higher than the Japanese Furukawa (0.83kg.m<-3>.d<-1>) and Spanish Vazquez-Padin (0.5kg.m<-3>.d<-1>).
Description
Technical field
The invention belongs to water environmental management and regeneration field.Be specifically related to start and the method for Effec-tive Function for various normal temperature, high-ammonia-nitrogen sewage biomembrance process whole process autotrophic denitrification (CANON) technique.
Background technology
Full Autotrophic Ammonium Removal Process refers to that first aerobic ammonia-oxidizing bacteria is with O under aerobic condition
2for electron acceptor(EA), with NH
4 +-N is that electron donor is by NH
4 +be oxidized to NO
2 --N, anaerobic ammonium oxidizing bacteria is with NO simultaneously
2 --N is electron acceptor(EA), by NH
4 +-N direct oxidation is N
2process.This technique is whole process autotrophic denitrification process, can process only containing NH
4 +the sewage of-N, compares with traditional denitrification process, without the need to additional carbon, can save a large amount of energy consumption, and sludge yield is little, has broad application prospects.
Since TU Delft finds Anammox technology after going out the Full Autotrophic Ammonium Removal Process such as CANON based on Anammox technological development, Full Autotrophic Ammonium Removal Process is widely used in Holland, many places that are German and Asia, its reactor types is varied, treatment effect difference is large, but all higher than traditional biological denitrificaion approach.
In recent years, both at home and abroad Full Autotrophic Ammonium Removal Process conducted in-depth research and achieve certain achievement.The people such as the Furukawa of Japan are middle high temperature 30-35 DEG C at reaction conditions, and ammonia nitrogen concentration is 600-1000mg/L, pH=7.5, obtains higher total nitrogen elimination capacity and nitrogen removal rate respectively, reaches 0.83kgm
-3d
-1with 91%; The J.D.Villegas of Sweden etc. are 30 DEG C in temperature, and pH is 7.5, DO is adopt 10 times of dilution anaerobic digestion solution NH under 1 ~ 3mg/L condition
4 +-N=2.5g/L, adopts CSTR(with Biofilm carrier) reactor inoculation has nitrosification active sludge and had obvious total nitrogen loss at 40 days, and constantly reduce extension rate afterwards, final total nitrogen elimination capacity can reach 0.33kgm
-3d
-1, nitrogen removal rate can reach 80%; Hispanic Vazquez-Padin etc. adopt sbr reactor device, and final removal effect is 80%, elimination capacity average out to 0.5kgm
-3d
-1.Visible current Full Autotrophic Ammonium Removal Process is mainly used in high temperature height ammonia nitrogen field, and ubiquity the lower problem of processing load, and the process for normal temperature high-ammonia-nitrogen sewage need further research.
Summary of the invention
The object of the invention is that providing a kind of processes the biomembrance process whole process autotrophic deamination technique startup of high ammonia-nitrogen wastewater and the method for Effec-tive Function.
In the present invention, first water inlet substrate concn is improved, reactor is fully adapted to for high ammonia nitrogen matrix environment, improve influent load more afterwards, make the processing power that reactor reaches higher, during the course, filter tank adapts to even more important compared with its adaptation for change matrix environment for increasing the high flow rate brought due to flooding velocity and rising gas speed.
The present invention is applicable to 16-24 DEG C of normal temperature condition, the Full Autotrophic Ammonium Removal Process of high ammonia nitrogen from process high temperature, the whole process autotrophic denitrification biological filter of successful start treatment normal temperature high-ammonia-nitrogen sewage; The ratio of nitrogen removal rate and nitrogen reduction and water inlet nitrogen total mass, the nitrogen quality that total nitrogen elimination capacity and unit volume reactor are removed every day; The concrete steps of method are as follows:
Step one: reactor biofilm stage
Reactor adopts volcanic filling material, and inoculation CANON filters post back flushing floc sludge out.Intake total nitrogen concentration 380-420mg/L, ammonia nitrogen and nitrite nitrogen mass concentration ratio are 1:1, CaCO
3basicity mass concentration 800-1000mg/L.Adopt intermittent operation mode, if a peristaltic pump, pump speed 70-130rpm/min, draws water from reactor top, refluxes into reactor through bottom, runs the 4-6 cycle, each cycle 1 day.When nitrogen removal rate more than 50% and steady running within more than 3 days, think biofilm success.
Step 2: the unloading phase of becoming matrix
This stage running mode is continuum micromeehanics and continuous effluent, to intake total nitrogen concentration 280-320mg/L, ammonia nitrogen and nitrite nitrogen mass concentration ratio are 2:1, control reactor initial section rising filtering velocity 0.45-0.55cm/min, nitrogen removal rate only has 10-20%, total nitrogen elimination capacity 0.36-0.4kgm
-3d
-1.Be elevated to more than 20% when nitrogen removal rate and stablize after more than 3 days, it is all ammonia nitrogen that water inlet total nitrogen becomes, and mass concentration is 180-220mg/L, and now starting aeration provides dissolved oxygen, controls initial dissolution oxygen DO concentration 0.2-0.4mg/L; Successively raise its total nitrogen concentration of intaking, each rising 30%-100%, adjust reactor rising filtering velocity simultaneously, the 80%-100% of load at the end of making total nitrogen elimination capacity maintain the stage, the adjustment of dissolved oxygen determines according to the ratio of total nitrogen consumption and nitrate nitrogen growing amount, when ratio is greater than 8 and water outlet nitrite nitrogen concentration is less than 10mg/L and stablizes more than 7 days, improve dissolved oxygen, improve 50%-80% at every turn.For realizing becoming matrix process, after continuous more than 7 days of nitrogen removal rate is more than 70%, carries out next step adjustment, continues to raise its total nitrogen concentration of intaking, until 760-840mg/L.When continuous 10 days of nitrogen removal rate is more than 80%, the success unloading phase of becoming matrix.
Step 3: Effec-tive Function stage
Control the total nitrogen concentration 760-840mg/L of water inlet, water inlet CaCO
3basicity mass concentration 3200-3600mg/L, with the filtering velocity that rises for Con trolling index.Initial rising filtering velocity is 0.14-0.16cm/min, successively improves rising filtering velocity, improves 0.03-0.06cm/min at every turn, when continuous more than 7 days of nitrogen removal rate is more than 80%, enters next round and promotes.The adjustment of dissolved oxygen determines according to the ratio of total nitrogen consumption and nitrate nitrogen growing amount, when ratio is greater than 8 and water outlet nitrite nitrogen concentration is less than 10mg/L, improves dissolved oxygen, improves 50%-80% at every turn.When nitrogen removal rate all can not reach 80% in continuous more than 7 days, think that the front rising filtering velocity of adjustment reaches capacity, limit rising filtering velocity may ultimately reach 0.3-0.36cm/min, dissolved oxygen 5.5-6.0mg/L, and total nitrogen elimination capacity can reach 2.8-3.2kgm
-3d
-1, maintain reactor and run under the operating mode of limit filtering velocity.
Compared with existing Full Autotrophic Ammonium Removal Process, the present invention has following beneficial effect:
1) the intermittent operation mode that the proposes biofilm of the invention, makes biological attachment success ratio greatly improve;
2) the present invention proposes the method jointly controlling dissolved oxygen according to the ratio of total nitrogen consumption and nitrate nitrogen growing amount and nitrite nitrogen concentration, and give selection principle;
3) the invention provides under normal temperature Super matrix condition, the strategy and method of whole process autotrophic deamination process operation and maintenance.
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not limited thereto.
Accompanying drawing illustrates:
Fig. 1 is the whole process autotrophic denitrification testing apparatus schematic diagram that the present invention adopts
Fig. 2 adopts the reactor of the inventive method to account for total elimination capacity per-cent with filter height variation diagram in the change of the 129th, 130 two day experiment total nitrogen with elimination capacity, efficient layer depth is 64% of total filtering layer degree of depth, and section rising filtering velocity should be selected as controling parameters
Fig. 3 is the total nitrogen load and the concentration map that adopt the inventive method reactor, the 80-100% of each become elimination capacity before matrix last stage for it
Fig. 4 is the nitrogen removal rate and the operating parameter figure that adopt the inventive method reactor, and each all continuous more than 7 days of nitrogen removal rate that to become before matrix, more than 70%, improves Δ TN/ Δ NO before dissolved oxygen at every turn
3 -n is greater than 8 and water outlet nitrite nitrogen concentration was less than 10mg/L more than 7 days.
Embodiment
Embodiment 1
In process of the test, temperature is constant in 16-24 DEG C all the time, and testing apparatus is take volcanics as the biological filter of filler, as shown in Figure 1.Testing apparatus is made up of synthetic glass, internal diameter 28cm, high 1.2m, cubic capacity 74L, useful volume 64L.Reactor adopts cylindrical reactor, and footpath is deeply than being 1:3-1:8, and the volcanics filtrate of filling particle diameter 8-15mm, nonuniformity coefficient is less than 1.2, and inoculation CANON filters post back flushing floc sludge out.Filling volcanic filling material in post, loading height is 1.1m, and filling particle diameter is 7-9mm.Reactor bottom is equipped with aeration ring, and on the wall of filter tank, every 10cm is provided with a thief hole, and adopt peristaltic pump water inlet, water (flow) direction is upward flow, is provided with water outlet topmost.
Reactor inoculation CANON filters post back flushing floc sludge out, and through the cultivation of 147 days, reactor, through a series of change of load and operational conditions when, successfully started and energy steady running.
First being the biofilm stage, is 1:1 at influent ammonia nitrogen and nitrite nitrogen mass concentration ratio, and total nitrogen TN is 390-420mg/L, water inlet CaCO
3basicity mass concentration is adopt intermittent operation mode under the condition of 900mg/L, be specially with a peristaltic pump, draw water from reactor top, enter reactor, pump speed 100rpm/min from reactor bottom circulation again, run 5 cycles, 1 day each cycle, there is no idle mixing time between each cycle of operation, make the mud of inoculation successfully be attached on filtrate, through the operation nitrogen removal rate in 5 cycles more than 50% and can steady running 3 days.
The unloading phase of entering change matrix after biofilm, reactor operation scheme becomes continuum micromeehanics, continuous effluent.The first step reduces water inlet total nitrogen to 290-300mg/L, ratio 2:1, the CaCO of ammonia nitrogen and nitrite nitrogen concentration
3basicity mass concentration is 1000mg/L, and at this moment control section rising filtering velocity is 0.49cm/min, and initial nitrogen removal rate only has 18.1%, total nitrogen elimination capacity 0.36kgm
-3d
-1, run nitrogen removal rate after 7 days and be elevated to more than 20% and can steady running 3 days.Second step water inlet total nitrogen only has ammonia nitrogen, and water inlet total nitrogen is reduced to 190-220mg/L, CaCO
3basicity mass concentration is 1000mg/L, now start aeration and provide dissolved oxygen, initial dissolution oxygen concn 0.3mg/L, rising filtering velocity is reduced to 0.36cm/min, this stage initial total nitrogen elimination capacity NRR be on last stage at the end of 96%, ran total nitrogen average elimination capacity through 34 days and reach 0.78kgm
-3d
-1the adjustment of dissolved oxygen determines according to the ratio of total nitrogen consumption and nitrate nitrogen growing amount, when ratio is greater than 8 and water outlet nitrite nitrogen concentration is less than 10mg/L and stablizes more than 7 days, improves dissolved oxygen, 25th day dissolved oxygen improves 50% and reaches 0.45mg/L, within the 36th day, improves 66% and reaches 0.75mg/L.The total nitrogen concentration of 3rd step-up height water inlet is on last stage 150%, reaches 280-320mg/L, CaCO
3basicity mass concentration is 1300mg/L, and reduce rising filtering velocity to 0.28cm/min, total nitrogen elimination capacity is on last stage 85%, and through 19 day time, elimination capacity was promoted to 1.02kgm
-3d
-1, clearance is more than 70%, and the 59th day dissolved oxygen improves 60% and reach 1.2mg/L.4th step improve total nitrogen concentration be on last stage 200%, reach 590-610mg/L, CaCO
3basicity mass concentration is 2600mg/L, and reduce rising filtering velocity to 0.21cm/min, total nitrogen elimination capacity is on last stage 94%, and through 15 day time, total nitrogen elimination capacity reached 1.32kgm
-3d
-1, clearance is more than 70%, and the 69th day dissolved oxygen improves 58% and reach 1.9mg/L.5th step improve total nitrogen concentration be on last stage 133%, reach 780-820mg/L, CaCO
3basicity mass concentration is 3350mg/L, and rising filtering velocity is reduced to 0.15cm/min, and total nitrogen elimination capacity is on last stage 80%, and through 29 day time, total nitrogen elimination capacity reached 1.41kgm
-3d
-1, nitrogen removal rate is more than 80% and can steady running 10 days, and now dissolved oxygen reaches 1.9mg/L, the success unloading phase of becoming matrix.
In the Effec-tive Function stage, this stage intakes total nitrogen concentration 780-820mg/L, CaCO
3basicity mass concentration is 3350mg/L, by raising section rising filtering velocity and dissolved oxygen, the total nitrogen elimination capacity of reactor is improved.The first step rising filtering velocity brings up to 0.203cm/min, and dissolved oxygen increases to 3.0mg/L, and initial total nitrogen elimination capacity is 1.66kgm
-3d
-1, ran through 11 days, total nitrogen elimination capacity can reach 2.0kgm
-3d
-1, nitrogen removal rate can reach 80% and can steady running 7 days.Second step promotes rising filtering velocity 0.05cm/min on the basis of previous step, reaches 0.252cm/min, and dissolved oxygen increases to 4.8mg/L, and ran through 9 days, total nitrogen elimination capacity can reach 2.5kgm
-3d
-1, nitrogen removal rate can reach 80% and can steady running 7 days.3rd step rising filtering velocity reaches 0.305cm/min, and dissolved oxygen increases to 5.6mg/L, and ran through 11 days, total nitrogen elimination capacity can reach 3.03kgm
-3d
-1, nitrogen removal rate can reach 80% and can steady running 7 days.4th step rising filtering velocity reaches 0.357cm/min, but is through operation in 15 days, and nitrogen removal rate never reaches 80%.Work as rising filtering velocity so final and reach 0.305cm/min, during dissolved oxygen concentration 5.6mg/L, reach the whole process autotrophic denitrification effect of stability and high efficiency, now total nitrogen average removal rate reaches 87%, close to the nitrogen removal rate of theoretical whole process autotrophic denitrification 89%, total nitrogen elimination capacity is up to 3.03kgm
-3d
-1, higher than the domestic and international achievement in research of major part.Maintain reactor to run under the operating mode of limit rising filtering velocity, can run continually and steadily.
Claims (1)
1. normal temperature height ammonia nitrogen Full Autotrophic Ammonium Removal Process starts and an Effec-tive Function method, it is characterized in that:
1) in the biofilm stage: reactor adopts volcanic filling material, inoculation CANON filters post back flushing floc sludge out; Intake total nitrogen concentration 380-420mg/L, ammonia nitrogen and nitrite nitrogen mass concentration ratio are 1:1, CaCO
3basicity mass concentration 800-1000mg/L; Adopt intermittent operation mode, if a peristaltic pump, pump speed 70-130rpm/min, draws water from reactor top, refluxes into reactor through bottom, runs the 4-6 cycle, each cycle 1 day; When nitrogen removal rate more than 50% and steady running within more than 3 days, think biofilm success;
2) unloading phase of becoming matrix: this stage running mode is continuum micromeehanics and continuous effluent, to intake total nitrogen concentration 280-320mg/L, ammonia nitrogen and nitrite nitrogen mass concentration ratio are 2:1, control reactor initial section rising filtering velocity 0.45-0.55cm/min, nitrogen removal rate only has 10-20%, total nitrogen elimination capacity 0.36-0.4kgm
-3d
-1; Be elevated to more than 20% when nitrogen removal rate and stablize after more than 3 days, it is all ammonia nitrogen that water inlet total nitrogen becomes, and mass concentration is 180-220mg/L, and now starting aeration provides dissolved oxygen, controls initial dissolution oxygen DO concentration 0.2-0.4mg/L; Successively raise its total nitrogen concentration of intaking, each rising 30%-100%, adjust reactor rising filtering velocity simultaneously, the 80%-100% of load at the end of making total nitrogen elimination capacity maintain the stage, the adjustment of dissolved oxygen determines according to the ratio of total nitrogen consumption and nitrate nitrogen growing amount, when ratio is greater than 8 and water outlet nitrite nitrogen concentration is less than 10mg/L and stablizes more than 7 days, improve dissolved oxygen, improve 50%-80% at every turn; For realizing becoming matrix process, after continuous more than 7 days of nitrogen removal rate is more than 70%, carries out next step adjustment, continues to raise its total nitrogen concentration of intaking, until 760-840mg/L; When continuous 10 days of nitrogen removal rate is more than 80%, the success unloading phase of becoming matrix;
3) the Effec-tive Function stage: control the total nitrogen concentration 760-840mg/L of water inlet, water inlet CaCO
3basicity mass concentration 3200-3600mg/L, with the filtering velocity that rises for Con trolling index; Initial rising filtering velocity is 0.14-0.16cm/min, successively improves rising filtering velocity, improves 0.03-0.06cm/min at every turn, when continuous more than 7 days of nitrogen removal rate is more than 80%, enters next round and promotes; The adjustment of dissolved oxygen determines according to the ratio of total nitrogen consumption and nitrate nitrogen growing amount, when ratio is greater than 8 and water outlet nitrite nitrogen concentration is less than 10mg/L, improves dissolved oxygen, improves 50%-80% at every turn; When nitrogen removal rate all can not reach 80% in continuous more than 7 days, think that the front rising filtering velocity of adjustment reaches capacity, maintain reactor and run under the operating mode of limit filtering velocity.
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