CN104150687B - A kind of minimizing N 2the automatic control device for sewage treatment that O produces and working method thereof - Google Patents
A kind of minimizing N 2the automatic control device for sewage treatment that O produces and working method thereof Download PDFInfo
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- CN104150687B CN104150687B CN201410349361.7A CN201410349361A CN104150687B CN 104150687 B CN104150687 B CN 104150687B CN 201410349361 A CN201410349361 A CN 201410349361A CN 104150687 B CN104150687 B CN 104150687B
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Abstract
The invention discloses a kind of minimizing N
2the automatic control device for sewage treatment that O produces and working method thereof.Drip irrigation device of the present invention is: a kind of minimizing N
2the automatic control device for sewage treatment that O produces, comprise anaerobic treatment pool, anaerobic treatment pond, aerobic treatment pond and mudpan, be connected by inner circulating reflux pump and pipeline between anaerobic treatment pond and aerobic treating pond, be connected by outer circulation reflux pump and pipeline between anaerobic treatment pool with mudpan, anaerobic treatment pool NO
2 -detection probe, anaerobic treatment pond NO
2 -detection probe, aerobic treatment pond NO
2 -detection probe, dissolved oxygen detection probe, auxiliary air pump, inner circulating reflux pump are connected with PLC computerized control system respectively by wire with outer circulation reflux pump.The invention also discloses the working method of this automatic control device for sewage treatment.The present invention can be widely used in various actual waste water treating processes, and the practical situation according to existing Sewage Plant carry out scrap build installation, simple, strong operability.
Description
Technical field
The invention belongs to technical field of biological sewage treatment, relate to Wastewater Treated by Activated Sludge Process system automatic control technology, be specifically related to a kind of minimizing N
2the automatic control device for sewage treatment that O produces and working method thereof.
Background technology
Along with developing rapidly and social progress of world economy, the greenhouse gases that the mankind enter in air increase year by year, the a series of serious ecological problems such as sea level rise, polar region ice and snow area minimizing that cause global warming, and then cause the extensive concern of whole world various countries.N
2o is a kind of important greenhouse gases, and its Greenhouse effect are CO
2296 times.Meanwhile, N
2o or a kind of material damaged the ozone layer.Therefore, how effectively N is reduced
2the generation of O and release are one of hot issues of investigator's concern both at home and abroad in recent years.
Research shows, city domestic sewage treatment plant is N
2the important generation source of O.A vital role of city domestic sewage treatment plant is the removal realizing nitrogen-containing pollutant in sewage, and bio-denitrifying sewage process comprises the different metabolic reaction of nitrification and denitrification two, and two reaction process all can produce N
2o.Nitrifying process realizes NH primarily of nitrifier (as ammonia oxidizing bacteria) under aerobic condition
4 +or NH
3oxide compound is via NO
2 -be oxidized to NO
3 -process; And denitrification process primarily of denitrifying bacterium (as heterotrophic bacterium) under anoxic conditions by NO
3 -or NO
2 -be reduced into N
2o and N
2.
Much research finds, N in the nitrification and denitrification process of biological denitrificaion
2the generation of O is all with the NO of high density
2 -, treatment system NO
2 -accumulation be cause N
2the immediate cause that O produces.This is because in nitrifying process, the rising of nitrite concentration can make AOB (be N by nitrate reductase by denitrification
2o) N is produced
2o; In denitrification process, the rising of nitrite concentration can cause reduction and the N of denitrification efficiency
2the accumulation of O.Manyly cause N
2the condition that O produces, as: first low ratio of carbon to ammonium, high ammonia nitrogen loading, high COD load and low DO etc., can cause system NO
2 -accumulation, and then discharge a large amount of N
2o(Kampschreur, M.J; Temmink, H; Kleerebezem, R; Jetten, MSM; VanLoosdrecht, MCM.Nitrousoxideemissionduringwastewatertreatment.Waterr esearch, 2009.43 (17): p.4093-4103.).Therefore, by takeing effective measures, regulation system operational process, and then avoid NO
2 -accumulation phenomenon occurs, is that actual sewage treating processes realizes N
2the new route that O reduces discharging.
In recent years, around how reducing N in sanitary sewage disposal process
2this hot issue of the generation of O, domestic and international investigator has carried out a large amount of work, and has invented many sewage treatment process N
2the related process that O reduces discharging and method, but also there are some defects.Such as: publication number is that the patent of CN103466794A and CN103466795A each provides sewage treatment process minimizing N
2the control method that O produces, but all for sequencing wastewater treatment device, this processing mode is applicable to the less treating processes of sewage quantity.The biological denitrification process of current municipal sewage plant is N in water treatment
2the major sources of O, sewage quantity is comparatively large, generally all adopts continuous processing technique, though therefore these two innovation and creation can reduce N preferably
2the generation of O, but its range of application has larger limitation.Notification number is that the patent of CN102849850B proposes a kind of sewage denitrification dephosphorization process N
2o produces decrement control device and working method, uses dissolved oxygen, temperature, pH and ORP to pop one's head in online precise monitoring sewage treatment process, is regulated, realize sewage treatment process N by computer automatic controlled system
2o reduces discharging, but this device needs to seal reaction tank, and working method on-line monitoring project is many, and Systematical control is complicated, safeguard and construction cost higher, be not suitable for large size city sewage work.
Along with the raising of China's Economic development and the level of urbanization, future must You Gengduo sewage work come into operation, and considers huge quantity discharged and the N of sanitary sewage
2the Greenhouse effect that O is serious and the destruction to ozonosphere, research can reduce N
2the automatic control device for sewage treatment that O produces and working method thereof have important practical significance.
Summary of the invention
The present invention is directed to the limitation of above-mentioned technology and not enough and provide and a kind ofly reduce N
2the automatic control device for sewage treatment that O produces and working method thereof, for widely used urban sewage treatment process, by a large amount of theoretical analysis and many experiments checking, creatively by the NO in sewage treatment process
2 -concentration controls and N
2o produces and combines, and by the automatic adjustment to sewage treatment process, optimizes sewage treatment process, while guarantee wastewater treatment efficiency, reduce strong greenhouse gas N in a large number
2the generation of O.
Technical scheme of the present invention is: a kind of minimizing N
2the automatic control device for sewage treatment that O produces, comprise anaerobic treatment pool, anaerobic treatment pond, aerobic treatment pond and mudpan, wherein the water outlet of anaerobic treatment pool connects anaerobic treatment pond by anaerobic treatment pool water outlet, the water outlet in anaerobic treatment pond connects aerobic treating pond by anaerobic treatment pond water outlet, the water outlet in aerobic treatment pond connects mudpan by aerobic treatment pond water outlet, described anaerobic treatment pool, sludge agitation device is equipped with in anaerobic treatment pond and mudpan, it is characterized in that: the bottom in described aerobic treatment pond is provided with aeration tube, air pump and auxiliary air pump, wherein air pump is connected with aeration tube with auxiliary air pump, be connected by inner circulating reflux pump and pipeline between described anaerobic treatment pond and aerobic treating pond, for mud mixture in aerobic treatment pond is inputted in anaerobic treatment pond, described anaerobic treatment pool is connected by outer circulation reflux pump and pipeline with between mudpan, for the mud after precipitation in mudpan is inputted in anaerobic treatment pool, to maintain the sludge concentration in Sewage treatment systems, described anaerobic treatment pool, anaerobic treatment pool NO is respectively equipped with in anaerobic treatment pond and aerobic treating pond
2 -detection probe, anaerobic treatment pond NO
2 -detection probe and aerobic treating pond NO
2 -detection probe and be provided with dissolved oxygen detection probe in aerobic treatment pond, described anaerobic treatment pool NO
2 -detection probe, anaerobic treatment pond NO
2 -detection probe, aerobic treatment pond NO
2 -detection probe, dissolved oxygen detection probe, auxiliary air pump, inner circulating reflux pump are connected with PLC computerized control system respectively by wire with outer circulation reflux pump.
One of the present invention reduces N
2the working method of the automatic control device for sewage treatment that O produces, it is characterized in that comprising the following steps: (1) treatment sewage enters anaerobic treatment pool by the water-in on anaerobic treatment pool top, the residence time of sewage in anaerobic treatment pool is 1-1.5h, in anaerobic treatment pool, the stir speed (S.S.) of muddy water agitator is 450-550r/min, is arranged on the anaerobic treatment pool NO in anaerobic treatment pool
2 -real-Time Monitoring signal is fed back to PLC computerized control system by detection probe, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system will close outer circulation reflux pump automatically, bring NO in anaerobic treatment pool into reduce external reflux mud
3 -amount, reduces denitrification substrate, thus reduces NO
2 -concentration, reduces N
2the generation of O, as anaerobic treatment pool NO
2 -the NO that monitoring probe monitors
2 -when concentration is not more than 0.5mg/L, PLC computerized control system will open outer circulation reflux pump automatically, recover the normal running status of waste disposal plant, (2) sewage processed in anaerobic treatment pool enters anaerobic treatment pond by the overflow of anaerobic treatment pool water outlet, the residence time of sewage in anaerobic treatment pond is 1.5-2h, in anaerobic treatment pond, the stir speed (S.S.) of muddy water agitator is 450-550r/min, is arranged on the anaerobic treatment pond NO in anaerobic treatment pond
2 -real-Time Monitoring signal is fed back to PLC computerized control system by monitoring probe, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system will close inner circulating reflux pump automatically, bring NO in anaerobic treatment pond into reduce internal reflux mud
3 -amount, reduces denitrification substrate, thus reduces NO
2 -concentration, reduces N
2the generation of O, as anaerobic treatment pond NO
2 -the NO that monitoring probe monitors
2 -when concentration is not more than 0.5mg/L, PLC computerized control system will open inner circulating reflux pump automatically, and waste disposal plant recovers normal running status, (3) sewage processed in anaerobic treatment pond enters aerobic treatment pond by the water outlet overflow of anaerobic treatment pond, and the residence time of sewage in aerobic treatment pond is 6-8h, is arranged on the aerobic treatment pond NO in aerobic treatment pond
2 -real-Time Monitoring signal is fed back to PLC computerized control system by monitoring probe, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system will open auxiliary air pump automatically, to increase the dissolved oxygen in aerobic treatment pond, strengthen the carrying out of nitration reaction, and then reduce NO
2 -concentration, reduces N
2the generation of O, as aerobic treating pond NO
2 -monitoring probe monitors the NO in aerobic treatment pond
2 -when concentration is not more than 0.5mg/L, and when dissolved oxygen concentration is greater than 3mg/L, PLC computerized control system will close auxiliary air pump automatically, and waste disposal plant recovers normal running status, (4) sewage processed in aerobic treatment pond enters mudpan by the water outlet overflow of aerobic treatment pond, the residence time of sewage in mudpan is 1-2h, in mudpan, the mixing speed of muddy water agitator is 25-35r/min, in mudpan, oettIed sewage is discharged through mudpan water outlet by after the overflow of mudpan overflow weir, the mud produced after mudpan, part enters in anaerobic treatment pool by the backflow of outer circulation reflux pump, with the overall sludge concentration in holding device, part is discharged by mudpan mud discharging mouth, output adjusts according to apparatus sewage sludge concentration.
The present invention compared with prior art has following beneficial effect: (1) by PLC computerized control system can realization response device run online regulation and control, without the need to manual operation, additionally need not increase and carry out N
2the manual operation expense that O reduces discharging; (2) monitoring objective factor is few, and simply, cost is lower, easy to maintenance for equipment structure and control principle; (3), while keeping waste disposal plant to pollute object height removal efficiency, N is realized
2the effective generation of O declines to a great extent; (4) can be widely used in various actual waste water treating processes, the practical situation according to existing Sewage Plant carry out scrap build installation, simple, strong operability.
Accompanying drawing explanation
Fig. 1 reduces N in the present invention
2the structural representation of the automatic control device for sewage treatment that O produces, Fig. 2 reduces N in working method of the present invention
2the automatic control device for sewage treatment anaerobic treatment pool control strategy schematic diagram that O produces, Fig. 3 reduces N in working method of the present invention
2the automatic control device for sewage treatment anaerobic treatment pond control strategy schematic diagram that O produces, Fig. 4 reduces N in working method of the present invention
2the automatic control device for sewage treatment aerobic treatment pond control strategy schematic diagram that O produces.
Drawing illustrates: 1, water-in, 2, muddy water agitator, 3, anaerobic treatment pool, 4, anaerobic treatment pond, 5, aerobic treatment pond, 6, aeration tube, 7, auxiliary air pump, 8, air pump, 9, inner circulating reflux pump, 10, outer circulation reflux pump, 11, mudpan mud discharging mouth, 12, mudpan, 13, mudpan water outlet, 14, overflow weir, 15, aerobic treatment pond water outlet, 16, aerobic treatment pond NO
2 -monitoring probe, 17, dissolved oxygen monitoring probe, 18, anaerobic treatment pond water outlet, 19, anaerobic treatment pond NO
2 -monitoring probe, 20, anaerobic treatment pool water outlet, 21, anaerobic treatment pool NO
2 -monitoring probe, 22, PLC computerized control system.
Embodiment
The present invention will be further described in conjunction with the accompanying drawings and embodiments.As shown in Figure 1, a kind of minimizing N
2the automatic control device for sewage treatment that O produces is provided with anaerobic treatment pool 3, anaerobic treatment pond 4, aerobic treatment pond 5 and mudpan 12, concrete mode of connection is: anaerobic treatment pool 3 water outlet connects anaerobic treatment pond 4 by anaerobic treatment pool water outlet 20, anaerobic treatment pond 4 water outlet connects aerobic treating pond 5 by anaerobic treatment pond water outlet 18, and aerobic treatment pond 5 water outlet connects mudpan 12 by aerobic treatment pond water outlet 15.
Sewage water inlet in a device and flow pattern are: disposing of sewage enters anaerobic treatment pool 3 by the water-in 1 on anaerobic treatment pool 3 top, the residence time of sewage in anaerobic treatment pool 3 is 1-1.5h, the sewage processed in anaerobic treatment pool 3 enters anaerobic treatment pond 4 by anaerobic treatment pool water outlet 20 overflow, this process only relies on gravity to flow, do not produce additional energy, the residence time of sewage in anaerobic treatment pond 4 is 1.5-2h, the sewage processed in anaerobic treatment pond 4 enters aerobic treatment pond 5 by water outlet 18 overflow of anaerobic treatment pond, this process only relies on gravity to flow, do not produce additional energy, the residence time of sewage in aerobic treatment pond 5 is 6-8h, the sewage processed in aerobic treatment pond 5 enters mudpan 12 by water outlet 15 overflow of aerobic treatment pond, this process only relies on gravity to flow, do not produce additional energy, the residence time of sewage in mudpan 12 is 1-2h, in mudpan 12, oettIed sewage is by discharging through going out the mudpan mouth of a river 13 after mudpan overflow weir 14 overflow, this process only relies on gravity to flow, do not produce additional energy, the mud produced after mudpan 12 precipitates, part enters anaerobic treatment pool 3 by outer circulation reflux pump 10 backflow, with the overall sludge concentration in holding device, part is discharged by mudpan mud discharging mouth 11, output adjusts according to apparatus sewage sludge concentration.
For keeping mud in waste disposal plant to be in suspended state, be provided with muddy water agitator 2 in anaerobic treatment pool 3 and anaerobic treatment pond 4, stir speed (S.S.) is about 500r/min; For preventing forming large volume wadding block in active sludge precipitation process, affect sludge reflux and discharge, be provided with muddy water agitator 2 in mudpan 12, mixing speed is about 30r/min.
Be provided with aeration tube 6 in aerobic treatment pond 5, air pump 8 is connected with aeration tube 6 with auxiliary air pump 7, and during plant running, air pump 8 carries out aeration by aeration tube 6 in aerobic treatment pond 5, to maintain the dissolved oxygen of mud mixture in aerobic treatment pond 5.
Anaerobic treatment pool NO is provided with in anaerobic treatment pool 3
2 -monitoring probe 21, is provided with anaerobic treatment pond NO in anaerobic treatment pond 4
2 -monitoring probe 19, is provided with aerobic treatment pond NO in aerobic treatment pond
2 -monitoring probe 16 and dissolved oxygen monitoring probe 17.Anaerobic treatment pool 3 is connected by outer circulation reflux pump 10 with mudpan 12, and when device normally runs, outer circulation reflux pump 10 is opened, by the mud input anaerobic treatment pool 3 after precipitation in mudpan 12, to maintain the sludge concentration in Sewage treatment systems; Anaerobic treatment pond 4 is connected by inner circulating reflux pump 9 with aerobic treating pond 5, by the mud mixture input anaerobic treatment pond 4 in aerobic treatment pond 5, in the biological denitrification process of water treatment, and the NO that the nitration reaction occurred in aerobic treatment pond 5 produces
3 -, by inner circulating reflux pump 9 by NO
3 -input anaerobic treatment pond 4, and then anti-nitration reaction is there is in anaerobic treatment pond 4, reach the object of denitrogenation.
Anaerobic treatment pool 3 reduces N
2the control strategy that O produces is: opening control system when waste disposal plant runs, is arranged on the anaerobic treatment pool NO in anaerobic treatment pool 3
2 -monitoring probe 21, is fed back to PLC computerized control system 22 by Real-Time Monitoring signal, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system 22 will close external recycle of sludge reflux pump 10 automatically, bring NO in anaerobic treatment pool 3 into reduce external reflux mud
3 -amount, reduces denitrification substrate, thus reduces NO
2 -concentration, reduces N
2the generation of O, as anaerobic treatment pool NO
2 -the NO that monitoring probe 21 monitors
2 -when concentration is not more than 0.5mg/L, PLC computerized control system 22 will open external recycle of sludge reflux pump 10 automatically, recover the normal running status of waste disposal plant.
N is reduced in anaerobic treatment pond 4
2the control strategy that O produces is: opening control system when waste disposal plant runs, is arranged on the anaerobic treatment pond NO in anaerobic treatment pond 4
2 -monitoring probe 19, is fed back to PLC computerized control system 22 by Real-Time Monitoring signal, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system 22 will close inner circulation of sludge reflux pump 9 automatically, bring NO in anaerobic treatment pond 4 into reduce internal reflux mud
3 -amount, reduces denitrification substrate, thus reduces NO
2 -concentration, reduces N
2the generation of O, as anaerobic treatment pond NO
2 -the NO that monitoring probe 19 monitors
2 -when concentration is not more than 0.5mg/L, PLC computerized control system 22 will open inner circulation of sludge reflux pump 9 automatically, and waste disposal plant recovers normal running status.
N is reduced in aerobic treatment pond 5
2the control strategy that O produces is: opening control system when waste disposal plant runs, is arranged on the aerobic treatment pond NO in aerobic treatment pond 5
2 -monitoring probe 16, is fed back to PLC computerized control system 22 by Real-Time Monitoring signal, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system 22 will open auxiliary air pump 7 automatically, to increase the dissolved oxygen in aerobic treatment pond 5, strengthen the carrying out of nitration reaction, and then reduce NO
2 -concentration, reduces N
2the generation of O, as aerobic treating pond NO
2 -monitoring probe 16 monitors the NO in aerobic treatment pond 5
2 -concentration is not more than 0.5mg/L, and when dissolved oxygen concentration is greater than 3mg/L, PLC computerized control system 22 will close auxiliary air pump 7 automatically, and waste disposal plant recovers normal running status.
Embodiment 1
The real life wastewater treatment process discharged for certain community, the minimizing N of employing
2o produce automatic control device for sewage treatment as shown in Figure 1, the minimizing N of employing
2the automatic control of sewage treatment strategy that O produces as in Figure 2-4, the useful volume 5L of selected waste disposal plant anaerobic treatment pool, the useful volume 10L in anaerobic treatment pond, the useful volume 30L in aerobic treatment pond, the useful volume 10L of mudpan, wastewater influent water quality is: COD concentration 300-400mg/L, NH
4 +concentration 40-50mg/L, TN concentration 47-52mg/L, sewage load is 85L/d, reactor seed sludge adopts Sewage Plant aerobic treatment pond fresh activity mud, in reactor, sludge concentration maintains 2500-3000mg/L, aerobic treatment pond aeration rate is constant in 200L/h, and dissolved oxygen concentration maintains 2mg/L, and sludge age maintains 15d.
Open waste disposal plant, carry out sewage disposal in normal state, anaerobic treatment pool, anaerobic treatment pond and aerobic treating pond reduce N
2before the Controlling System that O produces is opened, wastewater treatment efficiency is: COD clearance average 95%, NH
4 +average 95%, the TN clearance average 80%, N of clearance
2o generation is 45-55mg/d.
Open anaerobic treatment pool, anaerobic treatment pond and aerobic treating pond and reduce N
2the Controlling System that O produces.In anaerobic treatment pool, work as NO
2 -when concentration is greater than 0.5mg/L, PLC computerized control system closes external recycle of sludge reflux pump automatically, works as NO
2 -when concentration is not more than 0.5mg/L, outer circulation reflux pump reopens; In anaerobic treatment pond, work as NO
2 -when concentration is greater than 0.5mg/L, PLC computerized control system closes inner circulating reflux pump automatically, works as NO
2 -when concentration is not more than 0.5mg/L, inner circulating reflux pump reopens; In aerobic treatment pond, work as NO
2 -when concentration is greater than 0.5mg/L, PLC computerized control system opens the oxygenation of auxiliary air pump increase to aerobic treatment pond, works as NO
2 -concentration is not more than 0.5mg/L, and when dissolved oxygen concentration is greater than 3mg/L, auxiliary air pump is closed.
Reduce N
2after the automatic control device for sewage treatment that O produces and working method thereof are applied, wastewater treatment efficiency is: COD clearance average 94%, NH
4 +average 93%, the TN clearance average 78% of clearance, the treatment effect of principal pollutant does not decline, and still maintains high treatment efficiency, N
2o generation is 4-6mg/d, have dropped about 90%, while keeping waste disposal plant high treatment efficiency, achieves N
2declining to a great extent of O generation.
More than show and describe ultimate principle of the present invention, principal character and advantage, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall into claimed scope of the present invention.
Claims (2)
1. one kind is reduced N
2the automatic control device for sewage treatment that O produces, comprise anaerobic treatment pool, anaerobic treatment pond, aerobic treatment pond and mudpan, wherein the water outlet of anaerobic treatment pool connects anaerobic treatment pond by anaerobic treatment pool water outlet, the water outlet in anaerobic treatment pond connects aerobic treating pond by anaerobic treatment pond water outlet, the water outlet in aerobic treatment pond connects mudpan by aerobic treatment pond water outlet, described anaerobic treatment pool, sludge agitation device is equipped with in anaerobic treatment pond and mudpan, it is characterized in that: the bottom in described aerobic treatment pond is provided with aeration tube, air pump and auxiliary air pump, wherein air pump is connected with aeration tube with auxiliary air pump, be connected by inner circulating reflux pump and pipeline between described anaerobic treatment pond and aerobic treating pond, for mud mixture in aerobic treatment pond is inputted in anaerobic treatment pond, described anaerobic treatment pool is connected by outer circulation reflux pump and pipeline with between mudpan, for the mud after precipitation in mudpan is inputted in anaerobic treatment pool, to maintain the sludge concentration in Sewage treatment systems, described anaerobic treatment pool, anaerobic treatment pool NO is respectively equipped with in anaerobic treatment pond and aerobic treating pond
2 -detection probe, anaerobic treatment pond NO
2 -detection probe and aerobic treating pond NO
2 -detection probe and be provided with dissolved oxygen detection probe in aerobic treatment pond, described anaerobic treatment pool NO
2 -detection probe, anaerobic treatment pond NO
2 -detection probe, aerobic treatment pond NO
2 -detection probe, dissolved oxygen detection probe, auxiliary air pump, inner circulating reflux pump are connected with PLC computerized control system respectively by wire with outer circulation reflux pump.
2. a minimizing N according to claim 1
2the working method of the automatic control device for sewage treatment that O produces, it is characterized in that comprising the following steps: (1) treatment sewage enters anaerobic treatment pool by the water-in on anaerobic treatment pool top, the residence time of sewage in anaerobic treatment pool is 1-1.5h, in anaerobic treatment pool, the stir speed (S.S.) of muddy water agitator is 450-550r/min, is arranged on the anaerobic treatment pool NO in anaerobic treatment pool
2 -real-Time Monitoring signal is fed back to PLC computerized control system by detection probe, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system will close outer circulation reflux pump automatically, as anaerobic treatment pool NO
2 -the NO that monitoring probe monitors
2 -when concentration is not more than 0.5mg/L, PLC computerized control system will open outer circulation reflux pump automatically, recover the normal running status of waste disposal plant, (2) sewage processed in anaerobic treatment pool enters anaerobic treatment pond by the overflow of anaerobic treatment pool water outlet, the residence time of sewage in anaerobic treatment pond is 1.5-2h, in anaerobic treatment pond, the stir speed (S.S.) of muddy water agitator is 450-550r/min, is arranged on the anaerobic treatment pond NO in anaerobic treatment pond
2 -real-Time Monitoring signal is fed back to PLC computerized control system by monitoring probe, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system will close inner circulating reflux pump automatically, as anaerobic treatment pond NO
2 -the NO that monitoring probe monitors
2 -when concentration is not more than 0.5mg/L, PLC computerized control system will open inner circulating reflux pump automatically, and waste disposal plant recovers normal running status, (3) sewage processed in anaerobic treatment pond enters aerobic treatment pond by the water outlet overflow of anaerobic treatment pond, and the residence time of sewage in aerobic treatment pond is 6-8h, is arranged on the aerobic treatment pond NO in aerobic treatment pond
2 -real-Time Monitoring signal is fed back to PLC computerized control system by monitoring probe, as the NO monitored
2 -when concentration is greater than 0.5mg/L, PLC computerized control system will open auxiliary air pump automatically, to increase the dissolved oxygen in aerobic treatment pond, as aerobic treating pond NO
2 -monitoring probe monitors the NO in aerobic treatment pond
2 -when concentration is not more than 0.5mg/L, and when dissolved oxygen concentration is greater than 3mg/L, PLC computerized control system will close auxiliary air pump automatically, and waste disposal plant recovers normal running status, (4) sewage processed in aerobic treatment pond enters mudpan by the water outlet overflow of aerobic treatment pond, the residence time of sewage in mudpan is 1-2h, in mudpan, the mixing speed of muddy water agitator is 25-35r/min, in mudpan, oettIed sewage is discharged through mudpan water outlet by after the overflow of mudpan overflow weir, the mud produced after mudpan, part enters in anaerobic treatment pool by the backflow of outer circulation reflux pump, with the overall sludge concentration in holding device, part is discharged by mudpan mud discharging mouth, output adjusts according to apparatus sewage sludge concentration.
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| CN105481092A (en) * | 2016-01-11 | 2016-04-13 | 河南师范大学 | Sewage treatment device achieving automatic control function by monitoring N2O and control method |
| CN106007171A (en) * | 2016-05-20 | 2016-10-12 | 河南师范大学 | Integrated sludge reduction recycling and N2O emission reduction sewage treatment device and method for operating same |
| CN108776429A (en) * | 2018-06-20 | 2018-11-09 | 江苏复星节能环保有限公司 | Improve biochemistry pool mixing effect method |
| CN112047467B (en) * | 2020-08-07 | 2022-06-07 | 山东思源水业工程有限公司 | Intelligent efficient aeration biochemical system |
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|---|---|---|---|---|
| CN101372374A (en) * | 2008-06-27 | 2009-02-25 | 北京工业大学 | Control method for decreasing N2O in sewerage denitrification process |
| CN101792243A (en) * | 2010-04-12 | 2010-08-04 | 哈尔滨工业大学 | Two-stage biological selection denitrifying phosphorus and nitrogen removal sewage treatment device and method thereof |
| CN102849850A (en) * | 2012-07-29 | 2013-01-02 | 北京工业大学 | Reduction control device and method for N2O produced in denitrification dephosphorization process |
| CN203976589U (en) * | 2014-07-22 | 2014-12-03 | 河南师范大学 | A kind of automatic control device for sewage treatment that reduces N2O generation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100796456B1 (en) * | 2007-06-22 | 2008-01-21 | 태화강재산업 주식회사 | Waste water treatment process control apparatus and method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372374A (en) * | 2008-06-27 | 2009-02-25 | 北京工业大学 | Control method for decreasing N2O in sewerage denitrification process |
| CN101792243A (en) * | 2010-04-12 | 2010-08-04 | 哈尔滨工业大学 | Two-stage biological selection denitrifying phosphorus and nitrogen removal sewage treatment device and method thereof |
| CN102849850A (en) * | 2012-07-29 | 2013-01-02 | 北京工业大学 | Reduction control device and method for N2O produced in denitrification dephosphorization process |
| CN203976589U (en) * | 2014-07-22 | 2014-12-03 | 河南师范大学 | A kind of automatic control device for sewage treatment that reduces N2O generation |
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