CN105236573A - Fast cultivation method for SNAD biological film of urban sewage - Google Patents
Fast cultivation method for SNAD biological film of urban sewage Download PDFInfo
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Abstract
The invention relates to a fast cultivation method for an SNAD biological film of urban sewage and belongs to the field of water environment recovery and regeneration. The invention aims to solve the problem that urban sewage is low in carbon nitrogen ratio and low in nitrogen removal efficiency and causes waste of a lot of energy sources. The method comprises: by taking household sewage as raw water and by adopting a sequencing batch biofilm reactor, controlling the temperature at 30 DEG C and the aeration rate at 500 L/h, firstly, culturing an efficient denitrifying biological film; then changing an aeration stage to an intermittent aeration mode; and arranging a hydraulic stirring device in a non-aeration stage, wherein a carrier is fully mixed with the sewage, and other conditions are not changed. The cycle index of intermittent aeration is set to avoid excessive aeration after complete ammonia and nitrogen degradation. After a period of time, the SNAD biological film is successfully cultured, and the total nitrogen of the reactor reaches over 80%. Batch experiments verify that a biological film carrier is good in anaerobic ammonia oxidation activity and nitrite nitrogen denitrification activity.
Description
Technical field
The invention belongs to a kind of technical field of sewage, relate to the biomembranous cultural method of one way of life sewage SNAD.
Background technology
The denitrogenation of city domestic sewage traditional biological adopts nitrated, and denitrification process, also exists carbon source deficiency, the problem that aeration consumption is large.Anaerobic ammonium oxidation technology for biological denitrification has reduction energy consumption, saves carbon source, reduces the advantages such as sludge creation amount.Adopt synchronous nitrosification, Anammox, denitrification process (SNAD) can realize the removal of ammonia nitrogen and COD in a reactor.But aerobic ammonia oxidation bacterium (AOB) and Anammox (anammox) bacteria growing speed slow, cell yield is low, responsive to environmental change, causes the dominant bacteria acclimating time long, processing efficiency is low, requires high to reactor organisms interception capacity.The research of current SNAD technique concentrates on artificial distribution and Gao nitrogenous effluent (percolate, sludge liquor), and the research about low ammonia nitrogen municipal effluent is less.Biofilm reactor and SBR operation scheme contribute to sludge loss in minimizing reactor, increase the sludge concentration in reactor, improve the anti impulsion load of reactor, solve traditional technology mud-water separation time length, volumetric loading rate problem preferably.
Summary of the invention
The present invention can turn out the SNAD microbial film with greater activity, completes synchronous nitrosification, Anammox, denitrification process, realize the removal of ammonia nitrogen and COD at a reactor, improves reactor and holds stream ability to mud.The present invention relates to the biomembranous fast culture process of a kind of municipal effluent SNAD, it is characterized in that:
(1) reactor adopts SBR operational mode, and carry out next cycle after periodic duty is complete, draining ratio is 81%, and water port is arranged on the above 20cm place of reactor bottom, and water port diameter is 20mm at once.Place Pall ring in reactor, the diameter of Pall ring is 25mm, and centre is divided into multiple little lattice, and the diameter of each little lattice is 4mm.
(2) the volume ratio R value of the volume/reactor of Pall ring controls 37%.
(3) nitrated biomembranous cultivation:
Reactor adopts SBR operation scheme water inlet (5min), aeration (240min), precipitation (10min), and draining (10min) leaves standstill (1min);
In sbr reactor device, temperature controls is 30 DEG C, and aeration rate is 500L/h, and in the cycle, dissolved oxygen maintains 2-8mg/L;
The ammonia nitrogen removal load of nitrated biofilm reactor reaches 0.20-0.25kgN/ (m
3d), show that nitrated biofilm reactor is tamed, enter next stage;
(4) nitrosification, Anammox, denitrifying coupling denitrification biomembrane cultivation stage:
The nitrated biofilm reactor operation scheme changing foregoing domestication good is: water inlet (5min), intermittent aeration (20min aeration/20min non-aeration), rear aeration (20min), precipitation (10min), draining (10min), leaves standstill (1min).
Intermittent aeration is set to: 20min aeration/20min non-aeration.
It is 30 DEG C that reactor temperature controls, and aeration rate 500L/h, aeration phase dissolved oxygen is 5.0-5.5mg/L.
In non aerated phases, hydraulic agitation device starts, and carrier is fully mixed with sewage.
In one-period, the cycle index of aeration and non-aeration controls to be 11 times, and in the guarantee cycle, ammonia nitrogen degradation is complete, and inlet COD loading controls as 0.30-0.40kgCOD/ (m
3d).Run for some time, after the total nitrogen removal ability of question response device reaches 50%, in order to avoid ammonia nitrogen degradation complete after excess aeration, the cycle index reducing aeration and non-aeration in one-period is 7 times.
(5) when nitrogen removal rate is greater than 80%, show nitrosification, Anammox, denitrifying coupling denitrification biomembrane is cultivated successfully.
Accompanying drawing explanation
1. reactor assembly as shown in Figure 1.
2. in Fig. 1,1-intake pump; 2-gas meter; 3-aeration plate; 4-magnetic valve; 5-water shoot; 6-heating rod; 7-dissolved oxygen probe; 8-pH pops one's head in; 9-Pall ring; 10-hydraulic agitator; 11-Controlling System;
Embodiment
1. reactor assembly as shown in Figure 1.
2. the water inlet that example uses is community life sewage, and influent ammonium concentration 60-80mg/l, nitre nitrogen concentration is less than 1mg/l, and sub-nitrogen concentration is less than 1mg/l, and COD concentration is 160mg/l-250mg/l.
3. adopt the operation steps of aforesaid method as follows:
1) reactor assembly and water inlet
Reactor adopts SBR operational mode, and carry out next cycle after periodic duty is complete, draining ratio is 81%, first cultivates efficient nitrated microbial film, then cultivates nitrosification, Anammox, denitrifying coupling denitrification biomembrane at once.
Place Pall ring in reactor, the diameter of Pall ring is 25mm, and centre is divided into multiple little lattice, and the diameter of each little lattice is 4mm.
The volume ratio R value of the volume/reactor of Pall ring controls 37%.
In reactor, floc sludge concentration (MLSS) is 1000mg/L, and carrier sludge concentration (MLSS) is 0.05g/ carrier.
Water inlet is city domestic sewage, influent ammonium concentration 60-80mg/L, and nitre nitrogen concentration is less than 1mg/L, and sub-nitrogen concentration is less than 1mg/L, and COD concentration is 160-250mg/L;
2) nitrated biofilm reactor operation condition:
Adopt sbr reactor device, the SBR cycle of operation is: water inlet (5min), aeration (240min), precipitation (10min), and draining (10min) leaves standstill (1min).The effective water holding volume of reactor is 77.7L, 63L of at every turn intaking, and draining ratio is 81%, and water port is arranged on above 20cm place, bottom, and water port diameter is 20mm.It is 30 DEG C that reactor temperature controls, and aeration rate 500L/h, in the cycle, dissolved oxygen is 2-8mg/L, and the ammonia nitrogen removal load of nitrated biofilm reactor reaches 0.20-0.25kgN/ (m
3d), show that nitrated biofilm reactor is tamed, enter next stage.
3) nitrosification, Anammox, denitrifying coupling denitrification biomembrane cultivation stage:
1. operating conditions:
The nitrated biofilm reactor operation scheme changing foregoing domestication good is: water inlet (5min), intermittent aeration (20min aeration/20min non-aeration), rear aeration (20min), precipitation (10min), draining (10min), leaves standstill (1min).It is 30 DEG C that reactor temperature controls, and aeration rate 500L/h, aeration phase dissolved oxygen is 5.0-5.5mg/L.
Intermittent aeration is set to: 20min aeration/20min non-aeration.
In non aerated phases, hydraulic agitation device starts, and carrier is fully mixed with sewage.
In one-period, the cycle index of aeration and non-aeration controls to be 11 times, and in the guarantee cycle, ammonia nitrogen degradation is complete, and inlet COD loading controls as 0.30-0.40kgCOD/ (m
3d), 20d is run.After the total nitrogen removal ability of question response device reaches 50%, in order to avoid ammonia nitrogen degradation complete after excess aeration, the cycle index reducing aeration and non-aeration in one-period is 7 times, continues to run 20d.
The result of continuous running experiment shows, under these conditions, when the cycle index of aeration and non-aeration controls to be 11 times, the nitrogen removal rate variation range of reactor is 57-74%, when the cycle index of aeration and non-aeration controls to be 7 times, the nitrogen removal rate of reactor rises to 83% gradually.40d, batch examination experiment shows that the anaerobic ammoxidation activity of biofilm carrier reaches 0.232kgTN/ (kgVSSd), and nitrite nitrogen denitrification activity is 0.211kgN/ (kgVSSd).Aerobic nitrite nitrogenization activity is 0.017kgN/ (kgVSSd).
4. other forms of change and variation can also be made on the basis of above-mentioned principle.These changes and variation are still among protection scope of the present invention.
Claims (1)
1. the biomembranous fast culture process of municipal effluent SNAD, is characterized in that:
(1) reactor adopts SBR operational mode, and carry out next cycle after periodic duty is complete, draining ratio is 81%, and water port is arranged on the above 20cm place of reactor bottom, and water port diameter is 20mm at once; Place Pall ring in reactor, the diameter of Pall ring is 25mm, and centre is divided into multiple little lattice, and the diameter of each little lattice is 4mm;
(2) the volume ratio R value of the volume/reactor of Pall ring controls 37%;
(3) nitrated biomembranous cultivation:
Reactor adopts SBR operation scheme: water inlet 5min, aeration 240min, and precipitation 10min, draining 10min, leave standstill 1min;
In sbr reactor device, temperature controls is 30 DEG C, and aeration rate is 500L/h, and in the cycle, dissolved oxygen maintains 2-8mg/L;
The ammonia nitrogen removal load of nitrated biofilm reactor reaches 0.20-0.25kgN/ (m
3d), show that nitrated biofilm reactor is tamed, enter next stage;
(4) nitrosification, Anammox, denitrifying coupling denitrification biomembrane cultivation stage:
The nitrated biofilm reactor one-period operation scheme changing foregoing domestication good is: water inlet 5min, intermittent aeration 20min aeration/20min non-aeration, rear aeration 20min, and precipitation 10min, draining 10min, leave standstill 1min;
It is 30 DEG C that reactor temperature controls, aeration rate 500L/h, and aeration phase dissolved oxygen is 5.0-5.5mg/L;
In non aerated phases, hydraulic agitation device starts, and Pall ring is fully mixed with sewage;
In one-period, the cycle index of aeration and non-aeration controls to be 11 times, and in the guarantee cycle, ammonia nitrogen degradation is complete, and inlet COD loading controls as 0.30-0.40kgCOD/ (m
3d); Run for some time, the total nitrogen removal ability of question response device reaches after more than 50%, and the cycle index reducing aeration and non-aeration in one-period is 7 times;
When nitrogen removal rate is greater than 80%, show nitrosification, Anammox, denitrifying coupling denitrification biomembrane is cultivated successfully.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753155A (en) * | 2016-03-20 | 2016-07-13 | 北京工业大学 | Optimized denitrification method adopting SNAD (simultaneous partial nitrification, anammox and denitrification) bio-membrane technology for municipal wastewater |
| CN106010967A (en) * | 2016-06-21 | 2016-10-12 | 浙江工业大学 | Temperature control type biological membrane culture experiment method for eliminating magnetic field influence and device |
| CN107935179A (en) * | 2017-12-05 | 2018-04-20 | 上海碧禹水务工程有限公司 | A kind of integrated domestic sewage treatment device using MBR techniques |
| CN108585189A (en) * | 2018-03-26 | 2018-09-28 | 北京工业大学 | The apparatus and method of segmentation water outlet denitrification dephosphorization-short distance nitration biological film coupling Anammox processing city domestic sewage |
| CN109179654A (en) * | 2018-09-06 | 2019-01-11 | 北京化工大学 | It is a kind of to flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines |
| WO2020034454A1 (en) * | 2018-08-15 | 2020-02-20 | 江南大学 | Method for determining optimal storage temperature of wastewater treatment biofilm |
| CN111348751A (en) * | 2018-12-21 | 2020-06-30 | 中国石油化工股份有限公司 | Rapid biofilm formation method of biofilm reactor |
| CN111825213A (en) * | 2019-04-19 | 2020-10-27 | 香港理工大学 | One-tank type mainstream anaerobic ammonia oxidation fluidized bed membrane bioreactor and sewage treatment method thereof |
| CN113860667A (en) * | 2021-11-09 | 2021-12-31 | 大连东泰有机废物处理有限公司 | Nitrogenous industrial wastewater treatment system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753155A (en) * | 2016-03-20 | 2016-07-13 | 北京工业大学 | Optimized denitrification method adopting SNAD (simultaneous partial nitrification, anammox and denitrification) bio-membrane technology for municipal wastewater |
| CN105753155B (en) * | 2016-03-20 | 2018-10-19 | 北京工业大学 | A kind of optimization denitrogenation method of municipal sewage SNAD biomembrane process |
| CN106010967A (en) * | 2016-06-21 | 2016-10-12 | 浙江工业大学 | Temperature control type biological membrane culture experiment method for eliminating magnetic field influence and device |
| CN106010967B (en) * | 2016-06-21 | 2022-03-18 | 浙江工业大学 | Temperature-controlled biofilm culture experimental method and device for eliminating magnetic field influence |
| CN107935179A (en) * | 2017-12-05 | 2018-04-20 | 上海碧禹水务工程有限公司 | A kind of integrated domestic sewage treatment device using MBR techniques |
| CN108585189A (en) * | 2018-03-26 | 2018-09-28 | 北京工业大学 | The apparatus and method of segmentation water outlet denitrification dephosphorization-short distance nitration biological film coupling Anammox processing city domestic sewage |
| WO2020034454A1 (en) * | 2018-08-15 | 2020-02-20 | 江南大学 | Method for determining optimal storage temperature of wastewater treatment biofilm |
| CN109179654A (en) * | 2018-09-06 | 2019-01-11 | 北京化工大学 | It is a kind of to flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines |
| CN109179654B (en) * | 2018-09-06 | 2021-05-04 | 北京化工大学 | SNAD process quick starting method in up-flow type micro-aerobic membrane bioreactor |
| CN111348751A (en) * | 2018-12-21 | 2020-06-30 | 中国石油化工股份有限公司 | Rapid biofilm formation method of biofilm reactor |
| CN111825213A (en) * | 2019-04-19 | 2020-10-27 | 香港理工大学 | One-tank type mainstream anaerobic ammonia oxidation fluidized bed membrane bioreactor and sewage treatment method thereof |
| CN113860667A (en) * | 2021-11-09 | 2021-12-31 | 大连东泰有机废物处理有限公司 | Nitrogenous industrial wastewater treatment system |
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