CN102815790B - Simulation device and method for oxidation ditch technique - Google Patents
Simulation device and method for oxidation ditch technique Download PDFInfo
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- CN102815790B CN102815790B CN 201210348640 CN201210348640A CN102815790B CN 102815790 B CN102815790 B CN 102815790B CN 201210348640 CN201210348640 CN 201210348640 CN 201210348640 A CN201210348640 A CN 201210348640A CN 102815790 B CN102815790 B CN 102815790B
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Abstract
The invention relates to a simulation device and method for an oxidation ditch technique. The device comprises an anaerobic reactor and a simulated reactor, wherein a water inlet of the anaerobic reactor is connected with a water inlet pipe through a sewage pump; a water outlet of the anaerobic reactor is connected with a water inlet of the simulated reactor; a water outlet of the simulated reactor is connected with a drain pipe through a first valve; a return sludge outlet of the simulated reactor is connected with a return sludge inlet of the anaerobic reactor through a sludge pump; a surplus sludge outlet of the simulated reactor is connected with a sludge discharge pipe through a second valve; an aerator of the simulated reactor is connected with a gas pump through a gas pipe; the anaerobic reactor is provided with a first stirrer; and the simulated reactor is provided with a second stirrer. The operation method adopts a multicycle form of the simulated oxidation ditch; and in view of the long-time operation effect, the operation effects of the oxidation ditch are equivalent. The invention can well reflect the operation characteristics and biological reaction conditions of theoxidation ditch.
Description
Technical field
The present invention relates to simulator and method that water pollutes process field, particularly a kind of oxidation ditch process.
Background technology
Oxidation ditch is a kind of modification of activated sludge process.Oxidation ditch is the annular irrigation canals and ditches of a sealing, and muddy water mixed solution circulates repeatedly in irrigation canals and ditches and makes pollutent obtain degraded, has pulling flow type and complete hybrid-type characteristics.Oxidation ditch has the unrivaled advantages of other Sludge System such as system is simple, easy to operate, excess sludge is few, current consumption is low as one of effective ways of biological sewage treatment, at home and abroad is used widely in the sewage disposal.
Oxidation ditch generally adopts surperficial mechanical aeration, aerator disperses fixed point to arrange, dissolved oxygen concentration raises when mixed solution is flowed through the aeration zone, dissolved oxygen owing to microorganism oxygen consumption effect mixed solution when leaving the aeration zone progressively descends, so that be in anoxic condition, tangible dissolved oxygen concentration gradient appears, repeat said process when experiencing the aeration zone again, thereby in oxidation ditch, formed the aerobic alternation environment of good anoxic, for biological denitrificaion is created good envrionment conditions, be conducive to the removal of nitrogen, so oxidation ditch has the denitrogenation ability, just can reach the denitrogenation dephosphorizing effect if before oxidation ditch, set up anaerobic pond again.
At oxidation ditch denitrogenation and treatment effect research, the research means that adopts has two kinds usually at present: the one, and the oxidation ditch of employing actual motion, the 2nd, adopt the Oxidation Ditch Model simulation.Oxidation ditch scale by actual motion is big, operational conditions changes difficulty, can not realize the purpose of experimental study well, and the Oxidation Ditch Model volume is less, the hydraulic detention time of a circulation is very short, can not reflect operation characteristic and the reaction condition of oxidation ditch well.Particularly be difficult to carry out at the research of the biological denitrificaion of oxidation ditch and multiple spot aeration research and utilization Oxidation Ditch Model or reach research effect.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of simulator and method of oxidation ditch process, can reflect operation characteristic and the reaction condition of oxidation ditch well.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of simulator of oxidation ditch process, comprise anaerobic reactor 1 and analogue reactor 2, the water-in of anaerobic reactor 1 is connected with water inlet pipe by sump pump A, the water outlet of anaerobic reactor 1 is connected with the water-in of analogue reactor 2, the water outlet of analogue reactor 2 is connected with water shoot by the first valve C, the returned sluge outlet of analogue reactor 2 is connected by the returned sluge entrance of sludge pump B and anaerobic reactor 1, the excess sludge outlet of analogue reactor 2 is connected with shore pipe by the second valve D, the aerator of analogue reactor 2 is connected with air pump E by tracheae, anaerobic reactor 1 is equipped with the first agitator F, and analogue reactor 2 is equipped with the second agitator G.
Described sump pump A, sludge pump B, air pump E, the first valve C, the second valve D, the first agitator F and the second agitator G carry out full automatic control by the micro computer automatic control system.
Described anaerobic reactor 1 is anaerobic reation pool.
Described analogue reactor 2 is the simulation reaction pond.
A kind of analogy method of oxidation ditch process may further comprise the steps:
The first step, sump pump A, sludge pump B, the first agitator F and the second agitator G open simultaneously, and water inlet and mud reflux and begin, muddy water mixed solution gravity flow in the anaerobic reactor 1 enters in the analogue reactor 2, behind 0.5-2min, sump pump A, sludge pump B stop, and water inlet and mud reflux and finishes;
Second step, anaerobic reactor 1 and analogue reactor 2 carry out hybrid reaction behind the water inlet end, air pump E opens behind the 1-15min, analogue reactor 2 carries out oxygenic aeration, close air pump E behind the aeration 0.5-15min, open air pump E again behind the reaction 1-15min, carry out oxygenic aeration, aeration 0.5-15min closes air pump E again, the intermittently starting of an interior air pump E of circulation and operation simulation realize the different aeration modes of oxidation ditch, time between twice water inlet is called a circulation, and be equivalent to simulate a cycling time of oxidation ditch a cycling time;
The 3rd step, one of oxidation ditch is opened sump pump A again cycling time simultaneously after the end and sludge pump B advances water and mud refluxes when simulating, carry out new circulation, after 3-6 circulation of operation, close the second agitator G, the muddy water mixed solution in the analogue reactor 2 is staticly settled, carry out mud-water separation, behind the precipitation 30min, open the first valve C and carry out draining, water displacement is the water yield that the front several cycles is advanced;
The 4th step began new circulation again after draining finishes, and carried out sedimentation and drawing after 3-6 circulation of operation, move so repeatedly, and be equivalent from the operating performance of long-time running effect and oxidation ditch, namely realized the oxidation ditch process simulation.
In whole dry run, the first agitator F opens always, the second agitator G just closes when analogue reactor 2 precipitations, open At All Other Times, water inlet and the returned sluge that enters in the anaerobic reactor 1 carry out synchronously, and excess sludge discharges from analogue reactor 2 according to mud requirement in age unlatching second valve D before muddy water mixed solution begins to precipitate.
Advantage of the present invention is:
(1) this analogy method becomes temporal biological respinse based on Circulation Ratio of Oxidation Ditch with oxidation ditch biological respinse spatially, can reflect fluidised form feature and the service performance of oxidation ditch preferably.
(2) analogy method of the present invention can make the simulation test device volume little, not limited by the region to the experimental study of oxidation ditch, and analogy method more can suit the actual operating state of oxidation ditch, and simulation test is convenient reliable.
(3) the present invention can realize the different aeration modes of oxidation ditch and denitrogenation dephosphorizing are carried out simulation test research, moves convenient and reliable.
Description of drawings
Accompanying drawing is the structural representation of simulator of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Referring to accompanying drawing, a kind of simulator of oxidation ditch process, comprise anaerobic reactor 1 and analogue reactor 2, the water-in of anaerobic reactor 1 is connected with water inlet pipe by sump pump A, the water outlet of anaerobic reactor 1 is connected with the water-in of analogue reactor 2, the water outlet of analogue reactor 2 is connected with water shoot by the first valve C, the returned sluge outlet of analogue reactor 2 is connected by the returned sluge entrance of sludge pump B and anaerobic reactor 1, the excess sludge outlet of analogue reactor 2 is connected with shore pipe by the second valve D, the aerator of analogue reactor 2 is connected with air pump E by tracheae, anaerobic reactor 1 is equipped with the first agitator F, and analogue reactor 2 is equipped with the second agitator G.
Described sump pump A, sludge pump B, air pump E, the first valve C, the second valve D, the first agitator F and the second agitator G carry out full automatic control by the micro computer automatic control system.
Described anaerobic reactor 1 is anaerobic reation pool.
Described analogue reactor 2 is the simulation reaction pond.
A kind of analogy method of oxidation ditch process may further comprise the steps:
The first step, sump pump A, sludge pump B, the first agitator F and the second agitator G open simultaneously, and water inlet and mud reflux and begin, muddy water mixed solution gravity flow in the anaerobic reactor 1 enters in the analogue reactor 2, behind 0.5-2min, sump pump A, sludge pump B stop, and water inlet and mud reflux and finishes;
Second step, anaerobic reactor 1 and analogue reactor 2 carry out hybrid reaction behind the water inlet end, air pump E opens behind the 1-15min, analogue reactor 2 carries out oxygenic aeration, close air pump E behind the aeration 0.5-15min, open air pump E again behind the reaction 1-15min, carry out oxygenic aeration, aeration 0.5-15min closes air pump E again, the intermittently starting of an interior air pump E of circulation and operation simulation realize the different aeration modes of oxidation ditch, time between twice water inlet is called a circulation, and be equivalent to simulate a cycling time of oxidation ditch a cycling time;
The 3rd step, one of oxidation ditch is opened sump pump A again cycling time simultaneously after the end and sludge pump B advances water and mud refluxes when simulating, carry out new circulation, after 3-6 circulation of operation, close the second agitator G, the muddy water mixed solution in the analogue reactor 2 is staticly settled, carry out mud-water separation, behind the precipitation 30min, open the first valve C and carry out draining, water displacement is the water yield that the front several cycles is advanced;
The 4th step began new circulation again after draining finishes, and carried out sedimentation and drawing after 3-6 circulation of operation, move so repeatedly, and be equivalent from the operating performance of long-time running effect and oxidation ditch, namely realized the oxidation ditch process simulation.
In whole dry run, the first agitator F opens always, the second agitator G just closes when analogue reactor 2 precipitations, open At All Other Times, water inlet and the returned sluge that enters in the anaerobic reactor 1 carry out synchronously, and excess sludge discharges from analogue reactor 2 according to mud requirement in age unlatching second valve D before muddy water mixed solution begins to precipitate.
According to the analysis of oxidation ditch operation characteristic as can be known, the most basic characteristics of oxidation ditch are: the one, and the annular irrigation canals and ditches of sealing; The 2nd, the waterpower internal reflux that tool is bigger.Oxidation ditch belongs to a kind of form of loop reactor, has the fluidised form feature similar with loop reactor, namely shows as the plug-flow characteristic in one or several circulation, and repeatedly circulation shows as complete mixed characteristic.
The pulling flow type reaction has similar residence time distribution with rhythmic reaction, thereby the two has similar fluidised form.Therefore, the plug-flow reaction of oxidation ditch in a circulation can react to simulate with batch reactor plug-flow in time, and the storage effect spatially of repeatedly circulating of batch reactor just shows as the repeatedly cycle specificity of oxidation ditch.I.e. circulation pitch time of batch reactor water inlet, a cycling time of reflection oxidation ditch; The flooding quantity of intermittent water inflow is determined according to Circulation Ratio of Oxidation Ditch.Though batch reactor is intermittent water inflow, namely once circulation is the pulling flow type at intermittence, but repeatedly circulation namely for the operation of whole residence time for hybrid fully, that is to say that from the long-time running effect intermittently the oxidation ditch of dry run is equivalent with the oxidation ditch that moves continuously.
Pump in the simulation process, valve and agitator are carried out full automatic control by the micro computer automatic control system.Simulator and analogy method are simple, convenient, reliable.The Oxidation Ditch Model that can solve this simulator can not truly reflect the problem that the actual operating state of each circulation of oxidation ditch and material change, for the experimental study of oxidation ditch provides a kind of new approach.The present invention has considered the influence of anaerobic reaction to the oxidation ditch effect, both can be used for the research of oxidation ditch denitrogenation dephosphorizing, anaerobic pond can be used as hydrolysis acidification pool again, thereby make this method also be used for the research of other trade effluent, anaerobic reactor 1 among the present invention simultaneously also can save, and water inlet directly enters in the analogue reactor 2.
Claims (2)
1. the dry run method of an oxidation ditch process is characterized in that, may further comprise the steps:
The first step, sump pump (A), sludge pump (B), first agitator (F) and second agitator (G) are opened simultaneously, water inlet and mud reflux and begin, muddy water mixed solution gravity flow in the anaerobic reactor (1) enters in the analogue reactor (2), behind 0.5-2min, sump pump (A), sludge pump (B) stop, and water inlet and mud reflux and finishes;
Second step, mixed solution in anaerobic reactor behind the water inlet end (1) and the analogue reactor (2) carries out hybrid reaction separately, air pump behind the 1-15min (E) is opened, analogue reactor (2) carries out oxygenic aeration, close air pump (E) behind the aeration 0.5-15min, open air pump (E) again behind the reaction 1-15min, carry out oxygenic aeration, aeration 0.5-15min closes air pump (E) again, the different aeration modes of the intermittently starting of an interior air pump (E) of circulation and operation simulation oxidation ditch, time between twice water inlet is called a circulation, and be equivalent to simulate a cycling time of oxidation ditch a cycling time;
The 3rd step, one of oxidation ditch is opened sump pump (A) again cycling time simultaneously after the end and sludge pump (B) advances water and mud refluxes when simulating, carry out new circulation, after 3-6 circulation of operation, close second agitator (G), the muddy water mixed solution in the analogue reactor (2) is staticly settled, carry out mud-water separation, behind the precipitation 30min, open first valve (C) and carry out draining, water displacement is the water yield that the front several cycles is advanced;
The 4th step began new circulation again after draining finishes, and carried out sedimentation and drawing after 3-6 the circulation of reruning, move so repeatedly, and be equivalent from the operating performance of long-time running effect and oxidation ditch, namely realized the oxidation ditch process simulation;
The dry run method of this oxidation ditch process is finished in the simulator of oxidation ditch process, this device comprises anaerobic reactor (1) and analogue reactor (2), the water-in of anaerobic reactor (1) is connected with water inlet pipe by sump pump (A), the water outlet of anaerobic reactor (1) is connected with the water-in of analogue reactor (2), the water outlet of analogue reactor (2) is connected with water shoot by first valve (C), the returned sluge outlet of analogue reactor (2) is connected by the returned sluge entrance of sludge pump (B) and anaerobic reactor (1), the excess sludge outlet of analogue reactor (2) is connected with shore pipe by second valve (D), the aerator of analogue reactor (2) is by the gentle pipe coupling of air pump (E), anaerobic reactor (1) is equipped with first agitator (F), and analogue reactor (2) is equipped with second agitator (G);
Described sump pump (A), sludge pump (B), air pump (E), first valve (C), second valve (D), first agitator (F) and second agitator (G) are carried out full automatic control by the micro computer automatic control system;
Described anaerobic reactor (1) is anaerobic reation pool;
Described analogue reactor (2) is the simulation reaction pond.
2. the dry run method of a kind of oxidation ditch process according to claim 1, it is characterized in that: in whole dry run, first agitator (F) is opened always, second agitator (G) just cuts out when analogue reactor (2) precipitates, open At All Other Times, water inlet and returned sluge carry out synchronously, and excess sludge discharges from analogue reactor (2) according to mud requirement in age unlatching second valve (D) before muddy water mixed solution begins to precipitate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210348640 CN102815790B (en) | 2012-09-19 | 2012-09-19 | Simulation device and method for oxidation ditch technique |
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| CN 201210348640 CN102815790B (en) | 2012-09-19 | 2012-09-19 | Simulation device and method for oxidation ditch technique |
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| CN102815790B true CN102815790B (en) | 2013-09-11 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537679A (en) * | 1977-11-04 | 1985-08-27 | Reid John H | Conservation of momentum in a barrier oxidation ditch |
| JP4180772B2 (en) * | 2000-05-29 | 2008-11-12 | 株式会社日立製作所 | Design support device for oxidation ditch process |
| CN1194910C (en) * | 2001-09-21 | 2005-03-30 | 重庆康达环保股份有限公司 | Improved oxidation channel city sewage treamtent process |
| CN2605252Y (en) * | 2002-12-13 | 2004-03-03 | 聂原 | Efficient dephosphorizing-denitrificating improved oxydation channel |
| CN200953208Y (en) * | 2006-09-29 | 2007-09-26 | 北京工业大学 | A/O oxidation groove technology educational testing device |
| CN101659491A (en) * | 2008-08-27 | 2010-03-03 | 王强 | System and method for treating urban sewage |
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