CN1326783C - Aerator and advanced waste water treatment method using the same - Google Patents

Aerator and advanced waste water treatment method using the same Download PDF

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Publication number
CN1326783C
CN1326783C CNB031564860A CN03156486A CN1326783C CN 1326783 C CN1326783 C CN 1326783C CN B031564860 A CNB031564860 A CN B031564860A CN 03156486 A CN03156486 A CN 03156486A CN 1326783 C CN1326783 C CN 1326783C
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CN
China
Prior art keywords
inflation
mentioned
pump
water
air
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CNB031564860A
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Chinese (zh)
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CN1548384A (en
Inventor
韩相培
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韩相培
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Priority to KR10-2003-0029075 priority Critical
Priority to KR1020030029075 priority
Priority to KR20030029075A priority patent/KR100581752B1/en
Application filed by 韩相培 filed Critical 韩相培
Publication of CN1548384A publication Critical patent/CN1548384A/en
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Publication of CN1326783C publication Critical patent/CN1326783C/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

To provide an aerator used for sewage treatment, or the like, and an advanced sewage treating method using the same. The aerator provided with functions of swirling, aeration and intermittent aeration is constituted of a stirrer 3a which is installed in deep depth of water in a reaction tank, an ejector 1 which is equipped with an air supply tube 11 and is installed in shallow depth of water, a pump 4 having a suction port and an jetting port and an aeration stream guiding pipe 2. In the aerator, air inhaled by using the ejector 1 is forcibly fed by the pump 4 through the aeration stream guiding pipe 2 to deep depth of water to increase amount of air inhalation, is jetted while colliding with rotary vanes of the stirrer 3a to perform aeration and agitation in the reaction tank. Thus, the aerator is equipped with an intermittent aeration function which enables alternate repetition between aeration and non-aeration swirling to be performed. In the advanced sewage treating method, an aerator of a conventional system and this aerator are applied in an advanced sewage treating process, thus various operation modes can be selected and are variably operated. Thereby variation of operation conditions can be coped with and nitrogen and phosphor can be removed with high efficiencies from the sewage of a low inflow C/N ratio.

Description

Inflation mechanism and the method for wastewater treatment that utilizes this device
Technical field
The present invention relates to have stirring, inflation, the inflation mechanism of aerification function intermittently, have conserve space and remove simultaneously effectively the inflation, agitating function of denitrification and phosphorus and intersect and inflate repeatedly and aerification function at intermittence that on-inflatable stirs according to the condition of setting, easy maintenance, required facility takes with expenditure on power less, but the quiet operation in noiselessness ground; On the other hand, the invention still further relates to method of wastewater treatment, utilization in reactive tank, be provided with have stirring, inflation, intermittently the inflation mechanism of aerification function carries out waste water treatment process, variation according to operational conditions changes multiple operational mode, can tackle the variation of seasonal variation, offered load and operational conditionss such as change of water quality and temperature variation.
Background technology
Sewer line in Korea S mainly is an interflow formula pipeline, and the waste strength and the fluctuations in discharge that flow into the waste water processing station in low water season, rainy season and overflow stage are very big.When vacation, the Ullabana and New Year, because a large amount of population moves to seashore city and local small and medium-sized cities, so the offered load of the waste water processing station of National Capital Area reduces sharply, and the offered load of the waste water processing station of local small and medium-sized cities increases severely.In addition, the climate change in the four seasons is very clearly demarcated, and not only the wastewater flow rate of Various Seasonal is different with water quality, and the water temperature variation also very greatly, so the microbial growth condition differs widely.In addition, the waste water of Korea S, it is low that it flows into organic concentration, and its T-N concentration height on the contrary, the C/N ratio that therefore flows into waste water is lower, is difficult to remove denitrification and phosphorus.Such load variations need be changed into different operational conditionss with climate change, therefore reactive tank capacity and the operation scheme fixed waste water treatment process or the SBR class waste water treatment process such as AO, MLE, A20, Bardenpho, Phostrip of mode in the past is difficult to effectively handle the inflow water quality that produces Various Seasonal or vacation at present, flows into the waste water that C/N changes than, flow and water temperature etc.
Need a kind of certain countermeasure for this reason.Can tackle the operational conditionss such as inflow water quality, C/N ratio, flow and water temperature that change according to season and rainfall amount and vacation etc., do not change facility and device, with simple method change treatment process, the operational mode of the multiple mode that the optimal technology of employing selection is moved, develop modifiable wastewater treatment equipment and method, and farthest flowing into the organism utilization in denitrification reaction, in the low waste water of C/N ratio, carry out denitrogenation and dephosphorization effectively, and can easily supply with cheap organic substance from the outside.
For realizing the above-mentioned method of wastewater treatment of forming plurality of operating modes, need have stirring, inflation, the inflation mechanism of aerification function intermittently, promptly each reactive tank of waste water disposal facility according to the needs that flow into condition select whipped state, inflated condition or intermittently a kind of state in the inflated condition move, wherein whipped state is to keep anaerobic or anaerobic condition, inflated condition is to keep aerobic condition, and intermittently inflated condition is to intersect to inflate repeatedly with on-inflatable according to the condition of setting to stir.
For realizing above-mentioned have stirring, inflation, the reactive tank of aerification function intermittently, the waste water disposal facility that realization can move with plurality of operating modes, must utilize be provided with have stirrings, inflation, intermittence aerification function the reactive tank of inflation mechanism, the formation waste water treatment process.Realization has the inflation mechanism of above-mentioned functions, as utilizing the first method of the inflation mechanism of mode in the past, utilization is being provided with the additional stirrer that is provided with on the reactive tank of surperficial inflator, move the inflated condition that surperficial inflator keeps aerobic condition, and end the work of surperficial inflator, only move stirrer, the whipped state that then can keep anaerobic or anaerobic condition, and intersect to start according to imposing a condition and close above-mentioned surperficial inflator and stirrer, and under the state of stirrer work Open-closure surface inflator, thereby form intermittently inflated condition, can realize having stirring thus, inflation, the inflation mechanism of aerification function intermittently.
The inflation mechanism realization of mode has stirring as utilizing in the past, inflation, the second method of the inflation mechanism of aerification function intermittently, utilization is set up stirrer on the reactive tank of the inflation mechanism that is provided with the mode of being made of fan and dispersion pipe in the past, at the inflated condition that keeps aerobic condition by the dispersion pipe air supply, thereby interruption is supplied with but the whipped state of operation stirrer maintenance anaerobic or anaerobic condition from the air of dispersion pipe, and under the stirrer working order, spray air from dispersion pipe ejection air or termination according to the condition of setting, or intersection is carried out stirrer work repeatedly and disperse air in tube to supply with and form the inflation at intermittence, can realize having stirring thus, inflation, the inflation mechanism of aerification function intermittently.
But, utilize the inflation mechanism of mode in the past and have stirring, inflation, intermittently during aerification function, the complex structure of device, dynamic efficiency is low, produces noise and vibration, and is uneconomical aspect facility expense and power charge.
Above-mentioned surperficial inflator is to have with runner the water surface of reactive tank to be stirred, makes that air in the atmosphere directly supplies in the reaction solution, activated sludge is not deposited in reaction tank bottom and float over agitating function in the water.Therefore, the inflation dynamic efficiency is very good, can omit fan work with the buildings and the pipe arrangement etc. of supplying gas, but still the noise when producing reaction solution and disperseing in the atmosphere etc., cause secondary pollution, and increasing of evaporation diffusing capacity causes that water temperature descends, and therefore reduces breeding and the activity of microorganism, processing efficiency step-down during winter.
Above-mentioned distributing inflation mechanism is made up of air fed fan in the aeration tank and supply gas pipe arrangement and dispersion pipe, the air of sending into fan pressure by dispersion pipe with micro-air shape supply response groove, need fan, supply gas pipe arrangement and fan work buildings, therefore uneconomical, difficult in maintenance from facility expense and power charge aspect.Fan produces noise and vibration, and the heat release of electric motor and the air heat of compression nearly all are released in the air, and the water temperature of the groove that do not induce reaction rises, and causes waste.Particularly, if in being provided with the reactive tank of dispersion pipe, stirrer is set, be in for a long time and continue the on-inflatable whipped state or according to the condition of setting is inflated repeatedly and on-inflatable stirs inflation at intermittence, mud will be blocked dispersion pipe when on-inflatable, even inflation once more, therefore also can reduce the air feed rate, be provided with in the processing betterment works of operating waste water disposal facility of dispersion pipe, above-mentioned distributing inflation mechanism is used in preferred suitably restriction.
As the inflation mechanism that utilizes mode in the past realize having stirrings, inflation, intermittence aerification function the third method of inflation mechanism, can enumerate No. 0271932 patent registration disclosed method of the applicant's invention shown in Figure 1, promptly, can realize intermittently inflation mechanism on fan, Aeration in the water machine and air supply pipe by the air supply valve is set.The 26S Proteasome Structure and Function of this device is described as follows: the setting of this device has the Aeration in the water machine 2 of runner 4, stirring reaction liquid in the reactive tank more than two groups 10,11, or the air dispersion that will be pressed into from the outside is fine air shape, mixes stirring with reaction solution; Being connected air after the air supply pipe 6 of each reactive tank air distribution concentrated supplies with and is responsible for 7; The opposite side that above-mentioned air is supplied with the person in charge 7 is connected the relief outlet that pressure is sent into the fan 3 of air; Setting and timing register, ORP (redox-potential) controller, DO (being dissolved in the oxygen in the water) on above-mentioned air supply pipe but the air supply valve 1 of controller interlock automatic shutter.In this device, when fan operates in normality, close above-mentioned air supply valve, the whipped state that will keep anaerobic or anaerobic condition, and open above-mentioned air supply valve, and will keep the inflated condition of aerobic condition, according to the condition of setting above-mentioned air supply valve is repeated on-off action, will be converted to intersection and inflate the inflated condition at intermittence that stirs with on-inflatable repeatedly, therefore can realize improving the inflation mechanism with stirrings, inflation, intermittence aerification function of fan working efficiency.Though this device does not solve need be provided with fan, the problem of supply gas pipe arrangement and fan work buildings, and fan and Aeration in the water machine have been set, and has the advantage point that in the existing waste water processing station of operation, improves treatment process.
As the inflation mechanism that utilizes mode in the past realize having stirrings, inflation, intermittence aerification function the 4th kind of method of inflation mechanism, in No. 02505452 patent registration of the applicant's invention shown in Figure 2 disclosed " inflation at intermittence and the device thereof of waste water processing station ", on the squirt pump by mode in the past and the air supply pipe of injector self-acting valve is set, simple realization has stirring, froth breaking and intersects according to imposing a condition that inflation repeatedly and on-inflatable stir intermittence aerification function inflation mechanism, and can further have deodorizing and their defoaming function.
26S Proteasome Structure and Function to this device further describes as follows: in the outlet pipe 4 that forms at the spout 3 that prolongs pump 2 more than one a plurality of injector 5 is set, in above-mentioned injector, connect air intake pipe 6 with air control valve 8a, above-mentioned a plurality of air intake pipe is connected the air with air supply valve 8 and supplies with on the person in charge 7, therefore can inflate simultaneously and stir with a pump 2.But above-mentioned air supply valve has the aerification function at intermittence with timing register, ORP or DO controller interlock automatic shutter.On above-mentioned outlet pipe, connect froth breaking water pipe 14, push down the bubble that produces from reactive tank with froth breaking nozzle 15.In addition, above-mentioned air supplied with to be responsible for smelly source such as dewater unit room, thickener and pipe arrangement etc. be communicated with, so just can suck stench, carry out the biology deodorizing with the microorganism of reactive tank.
Pass through a plurality of injectors of combination among the present invention, even make that a pump also can constitute jumbo inflation mechanism.Wherein, mainly be the device more complicated of forming with pipe arrangement, it is many that the scene is provided with part, so the manufacture craft difficulty, the quality control difficulty.In addition, when in reactive tank, filling the moving phase biofilm carrier, cause destruction in the pump, other pump chambers 13 with screen cloth are set, complex structure for preventing that the moving phase carrier is drawn into.Particularly in the pipe arrangement headloss big, be drawn into the deep water place as the air of swelling property gas till, therefore can not exceed the inflation dynamic efficiency and stir the limitation of the low inflation mechanism in the past of dynamic efficiency with injector.
In order to be used to understand inflation mechanism feature of the present invention, the inflation mechanism with squirt pump in the past shown in Figure 3 has been proposed as a comparison.This in the past device do not have drop to disperse, the quiet operation of noiselessness, the heat that the motor of driving pump 2 produces all is communicated in the water, therefore the rising water temperature helps microorganism culturing.But above-mentioned squirt pump is to use the injector 1 to a kind of squirt pump of the low effect of proportion air little, compressible fluid, is drawn into the deep water place through air intake pipe 4, thus need very big power, uneconomical.It is different from stirrer in the water that reaction solution is directly stirred by rotating paddle, and by the indirect stirring reaction liquid of water spray from dispersion pipe 3 ejections, it is low therefore to stir dynamic efficiency.
Therefore, as mentioned above, need a kind of inflation mechanism of exploitation and method of wastewater treatment really, wherein method of wastewater treatment is by changing operational conditions, the change plurality of operating modes, can tackle the variation of seasonal variation, offered load and operational conditionss such as change of water quality, temperature variation, and tackle insufficient C/N ratio, can keep the efficient of removing of nitrogen and phosphorus; But inflation mechanism be have effectively be applicable to above-mentioned method of wastewater treatment have stirring, inflation, an inflation mechanism of aerification function and the quiet operation of noiselessness intermittently.
Summary of the invention
The present invention proposes for addressing the above problem.Its objective is and solve the technical problem of utilizing squirt pump, by improving to injecting new theory on the air suction of squirt pump, thereby can be according to the variation of operational conditions and can carry out the operation of multiple mode, improve dynamic efficiency, realize compact inflation device, do not produce secondary pollutions such as noise vibration and drop dispersion, the heat that device produces all is delivered to the rising water temperature in the reaction solution, improve processing efficiency, save the loaded down with trivial details pipe arrangement of supplying gas, do not need fan work buildings, particularly the distance minimization of air between injector that smokes and water spray supply pump, constitute by straight tube, provide thus and improve the inflation dynamic efficiency, has stirring, inflation, deodorizing, froth breaking, inflate the intermittence that inflation and on-inflatable intersect repeatedly, the air self-suction function, the power economy type inflation mechanism of compact construction; And provide and utilize this device, the change plurality of operating modes is dealt with the method for wastewater treatment of the variation of seasonal variation, offered load and operational conditionss such as change of water quality, temperature variation.
The present invention by drop disperse less, the quiet operation of noiselessness, the inflation mechanism advantage with squirt pump simple in structure realizes above-mentioned purpose.As described in to the explanation of Fig. 3, for improving the low shortcoming of inflation dynamic efficiency, improve the air suction, and be devoted to device that squirt pump and stirrer are formed as one.
The inflation mechanism utilization with injector of the mode in the past of Fig. 3 is from the negative pressure of the water spray generation of the nozzle ejection of injector, the air as compressible fluid that pressure hour volume can expand and proportion diminishes is drawn into the deep water place, and its inflation dynamic efficiency is very low.Therefore, in the device of the present invention, on the reactive tank top shoal or the water surface, injector is set, air supply pipe is communicated with atmosphere, be mixed with gas and liquid current effusive injector spout be deep into the bottom surface of reactive tank near the deep water place be connected with the delivering aerated water stream guiding tube.Proportion is little only be drawn into shoal as the air of compressible fluid with injector till, the air of the shoal that sucks with injector utilizes the ascent rate of the air filled cavity that forms by pump than above-mentioned delivering aerated water stream guiding tube inside of flowing of the reaction solution of incompressibility, big proportion to be forced to be transported to the deep water place quickly, spray from reactive tank bottom deep water, prolong the residence time in the water of micro-air thus, increase surperficial hydraulic pressure, improve oxygen transfer rate and inflation dynamic efficiency.
The inflation mechanism at intermittence with squirt pump of the mode in the past among above-mentioned Fig. 2 is finished stirring, inflation and intermittently inflation by the on-off action of air control valve.Therefore, for needing the injector of big power, inflation only needing also to be used for the stirring of low-power, so power consumption is too much even closing the on-inflatable agitation phases of air control valve.Therefore, the present invention utilizes turbo-pumps such as impeller pump, propeller pump or diagonal pumps for required the minimizing of power of stirring and intermittently inflating, in reactive tank, suck air, with the stirrer of the direct stirring reaction liquid of rotating paddle,, constitute inflation mechanism thus in addition with its formation one.When stirring was inflated with intermittence, inflate and stir separate operation, stir and the on-inflatable stirring, obtained the effect of improving that raising stirring dynamic efficiency, minimizing are intermittently inflated required power thus with stirrer.
If only utilize injector to constitute jumbo inflation mechanism, pipe arrangement is formed complicated, the produce in factory difficulty, the on-the-spot quality control difficulty that is provided with is when the required little stirring of above-mentioned power is stirred with the on-inflatable of intermittently inflating, identical during also with inflation, need too much power, cause power waste.As solution to the problems described above, the present invention proposes jumbo compact inflation device, promptly have and connect water injection chamber and the wind box that a plurality of injectors are supplied with water and air, shorten the water spray supply and make their direct connections with distance between pump and the injector, reduce the headloss of pipe arrangement thus, improve the inflation dynamic efficiency, save power.
Utilize the inflation mechanism of squirt pump in the past shown in Figure 2, for keeping stirring capacity, usually under the pump operation state, regulate the open and-shut mode of air control valve, be dissolved in the oxygen concn in the water in the conditioned reaction groove, even therefore under the less-in-demand condition of dissolved oxygen, also will waste power for stirring with the inflated condition same degree.Therefore, utilization of the present invention water spray supply to squirt pump under reactive tank mixes with the stirrer running status is provided with frequency modulator with pump, regulate the rotation number of pump, by changing the rotation number of above-mentioned drive-motor, can regulate flow and the pressure of supplying with above-mentioned injector, accurately the oxyty of conditioned reaction groove.Therefore, be different from the open mode of adjusting air control valve, be reduced to ratio, save the required drive of pump drive-motor, can save inflation power with the oxygen demand.In addition, above-mentioned stirrer is used pump ON-OFF (Open-closure) by the water spray of above-mentioned injector is supplied with, or is moved said pump and stirrer repeatedly by intersecting under common running status, can realize intermittently aerification function easily.
The present invention is by connecting relief outlet and the water injection chamber of inflation with the water spray supply pump, can constitute jumbo inflation mechanism, and by pump runner and guide blade being set at above-mentioned water injection chamber, the function of parallel pump, the velocity head that the pump runner forms is converted to pressure head by above-mentioned water cover, to spray water and directly deliver to injector nozzle with pressure, so apparatus structure is compact more, power waste also reduces.
At intermittence of utilizing squirt pump in the past in the inflation mechanism, for the moving phase biofilm carrier that prevents to flow into hotchpotch in the reactive tank or be used for the microorganism composite growth, and prevent from when repairing, to be provided with in the process of the pump that draws water the moving phase biofilm carrier by the pumping pressure breakage, other pump chambers are set, and the screen cloth of being made up of porous plate is set.Such structure, its device is formed complicated, and the pipe arrangement of pump and injector is long, and curved tube is many, causes power waste.Therefore, adopt the pipe arrangement of the water jet of the relief outlet of connection pump and injector inlet straight tube to replace curved tube among the present invention, reduce headloss, being provided with draws water uses pump, makes the water jet level of entering the mouth into of the relief outlet and the injector of lift pump.The method to set up of lift pump can be utilized the support platform or the seston of various ways, support the pump inlet of pump bottom with structural material with porose tubulose support, bring into play function in the lump with screen cloth, prevent to flow in the pump hotchpotch and moving phase biofilm carrier thus, and can reduce the pump degree of depth of drawing water, this helps the maintenance of pump.
In addition, can initiatively tackle the treatment process that waste water flows into condition and water temperature variation for realizing among the present invention, be connected in series four reactive tanks being made up of first to fourth reactive tank and handle as the settling tank of the outflow water solid-liquid separation of the 4th reactive tank of end reaction groove by flowing into waste water and reaction solution sequence of flow, constitute waste water treatment process thus.In above-mentioned first to the 3rd reactive tank, be respectively equipped with have stirring, inflation, the inflation mechanism at intermittence of aerification function intermittently, can intersect from the whipped state that keeps anaerobic or anaerobic condition, the inflated condition that keeps aerobic condition or according to imposing a condition and inflation repeatedly and on-inflatable stir intermittently select a kind of state operation the inflated condition.In the 4th reactive tank, has the inflation mechanism that can remain aerobic condition, thereby formation waste water treatment process, thus, according to the character that flows into water quality, flow into C/N ratio, load change, follow the operational conditionss such as water temperature variation of seasonal variation to change, the reactive tank of the above-mentioned waste water treatment process of formation is set at optimal operational mode moves.When if operational conditions changes, the operational conditions that changes is set optimal operational mode once more, move with the operational mode of change, thus can be by changing operational mode, even do not change facility and device, also can provide and initiatively to tackle the method for wastewater treatment that operational conditions changes.
Here, above-mentioned intermittence, inflation mechanism had deodorizing of the present invention and air self-suction function, be a kind of have stirring, inflation, inflation mechanism at intermittence of aerification function intermittently, can be by distributing inflation mechanism, have the associated plant of stirrer and air supply valve or have fan, Aeration in the water machine and air and supply with the associated plant of self-acting valve or have a kind of composition in the associated plant of surperficial inflator and stirrer with fan.
In addition, in order at utmost to utilize insufficient inflow organism in above-mentioned method of wastewater treatment, have from the 4th reactive tank and carry the internal recycling device of reaction solution to first reactive tank, thereby adopt the preceding denitrogenation method of the reaction solution circulated in countercurrent of the 4th reactive tank to first reactive tank, and in order under the air agitation state, to carry out centre denitrogenation and dephosphorisation reaction at the reactive tank of the whipped state of anaerobic or anaerobic condition operation or at the reactive tank of inflated condition operation at intermittence in above-mentioned first to the 3rd reactive tank, externally carbon source is injected former rubbish, animal waste, collect ight soil, the industry organic waste, or its fermented liquid, improve denitrogenation and dephosphorization efficient.In addition, the last stage as first reactive tank of initial reaction groove in above-mentioned four reactive tanks is provided with initial settling tank, and fermenter is set, the former mud that produces from above-mentioned initial settling tank with organic acid fermentation.In order under the on-inflatable whipped state, to carry out denitrogenation and dephosphorisation reaction at the reactive tank of the whipped state of anaerobic or anaerobic condition operation or at the reactive tank of inflated condition operation at intermittence in above-mentioned first to the 3rd reactive tank, externally carbon source is injected the former mud that above-mentioned fermenter ferments, and improves denitrogenation and dephosphorization efficient.Replenishing above-mentioned initial settling tank last stage drops into and flows into waste water or drop into methods such as former rubbish, animal waste, collection ight soil, industrial organic waste at above-mentioned fermenter, replenish insufficient organism, denitrification reaction and back denitrification reaction provide the method for wastewater treatment that improves denitrogenation and dephosphorization efficient thus before being applicable to simultaneously.
As mentioned above, according to inflation mechanism of the present invention and method of wastewater treatment, jumbo inflation mechanism can be provided, it has moves reactive tank under inflation or whipped state, optionally continue the function of aerobic condition or anaerobism (anaerobic) condition, inflate aerification function and deodorization functions at intermittence with the on-inflatable stirring operation repeatedly with intersecting, injector and pump lift loss are minimized, therefore power waste is few, and all drive parts are all worked in water, water temperature rises thus, improves reaction efficiency, realizes the quiet operation of noiselessness.In addition, realized method of wastewater treatment, this method has reactive tank and selects the waste water disposal facility of plurality of operating modes operation, be provided with in the described reactive tank to have and stir or aerification function, intersect according to imposing a condition inflate repeatedly stir with on-inflatable intermittence aerification function inflation mechanism, and according to the water temperature variation of following seasonal variation, the variation of offered load and water quality, and the variation of inflow C/N ratio etc., select the most suitable operational mode to move, when if operational conditions changes, the operational conditions that changes is set optimal operational mode once more to tackle these variations on one's own initiative, thereby the raising processing efficiency improves water quality environment.
Description of drawings
Fig. 1-Fig. 3 is the concept map with inflation mechanism in the past of squirt pump or Aeration in the water machine and fan;
Fig. 4 is the concept map of first embodiment of inflation mechanism of the present invention;
Fig. 5 is the concept map of second embodiment of inflation mechanism of the present invention;
Fig. 6 is the concept map of the 3rd embodiment of inflation mechanism of the present invention;
Fig. 7 is the concept map of the 4th embodiment of inflation mechanism of the present invention;
Fig. 8 is the concept map of the 5th embodiment of inflation mechanism of the present invention;
Fig. 9 is the concept map of the 6th embodiment of inflation mechanism of the present invention;
Figure 10 is the concept map of the 7th embodiment of inflation mechanism of the present invention;
Figure 11-11c be the present invention have stirring, inflation, intermittently aerification function inflation mechanism and utilize mode in the past intermittence inflation mechanism the artwork of method of wastewater treatment.
Embodiment
The bottom describes embodiments of the invention with reference to the accompanying drawings in detail.
[embodiment 1]
Fig. 4 is the concept map of first embodiment of inflation mechanism of the present invention.
In the present embodiment, inflation mechanism also is made up of the pump 4 and the delivering aerated water stream guiding tube 2 of injector 1 and suction and conveying reaction solution, and wherein injector 1 has at the shoal of reactive tank or the air supply pipe 11 of water surface setting.The water jet inlet 14 of above-mentioned injector 1 connects water spray supply-pipe 10, and it is connected with the relief outlet 5 of said pump.The ejiction opening 19 of above-mentioned delivering aerated water stream guiding tube is arranged on the deep water place of reactive tank bottom, makes the deep water ejection from the inflation water spray of spout 15 ejection of above-mentioned injector from reactive tank.Like this, be drawn into the above-mentioned delivering aerated water stream guiding tube top of shoal with above-mentioned injector as the air of the little proportion of compressible fluid, the air utilization that is drawn into delivering aerated water stream guiding tube inside is flowed as the reaction solution of the big proportion of incompressible fluid, ascent rate than the micro-air that forms with said pump is forced to deliver to deep water place, reactive tank bottom with pressure quickly, be sprayed onto reactive tank inside, bubble is provided in reactive tank thus.
By regulating the open and-shut mode of air supply valve 13, regulate air imbibed quantity in the present embodiment, can regulate the DO concentration of reactive tank thus, wherein the air supply valve is arranged on the above-mentioned air supply pipe.
In addition, the drive-motor of said pump has frequency modulator, utilizes the rotation number of the above-mentioned drive-motor of change, regulates flow and the pressure supplied with in the above-mentioned injector, regulates thus to suck air quantity, accurately the DO concentration of conditioned reaction groove.
Introduce an embodiment below, this embodiment is provided with the type injector by change to supply to the frequency that water spray is supplied with the electric current of the drive-motor of using pump from top of the present invention, change the water horse power of pump, regulates the suction air quantity.Wherein, the internal diameter of injector and delivering aerated water stream guiding tube is 50mm in the testing apparatus, is nozzle diameter that the injector of 30mm is arranged to make its nozzle segment to be positioned at water surface top 30cm, and the ejiction opening of delivering aerated water stream guiding tube front end is arranged on 3m deep water place.Utilize frequency modulator, the rotation number of turbo-pump is carried out numerous variations, thereby change the operating water horsepower of above-mentioned injector, its result is as shown in table 1 below, confirms that air imbibed quantity and water horse power change pro rata.
[table 1]
Control by the water horse power of supplying with water spray and to regulate the suction air quantity
Supply with the water horse power (kw) of water spray 0.061 ?0.108 ?0.151 ?0.207 ?0.286 ?0.302 ?0.345 ?0.418 ?0.469
Suck air quantity (1/sec) 0.90 ?1.31 ?2.94 ?3.36 ?5.49 ?6.44 ?7.08 ?7.94 ?8.24
The injector of mode (Fig. 2 and Fig. 3) in the past, under certain water horse power, injector itself was interrupted when promptly critical water horse power sucked air down.If surpass critical water horse power, the interim inspiration reactive tank of air, so the DO concentration of reactive tank in a large number is difficult to accurately control.But, in the present embodiment,,, regulate the water horse power of pump with the rotation number of frequency modulator control pump by load variations, supply with the air of suitable air quantity to reactive tank, therefore can accurately control DO concentration, by the ratio saving power of air feed rate.
In the present embodiment, air supply valve 13 also is set on above-mentioned air supply pipe, on-off action by this valve, reactive tank selects a pattern in inflation and the on-inflatable stirring to move, and above-mentioned air supply valve is set at and timing register, ORP, DO controller interlock, by its automatic shutter work, can move under the inflated condition at the intermittence that intersection is inflated repeatedly or on-inflatable stirs.
But, if stirrer 3 further is set on above-mentioned reactive tank, as required squirt pump and above-mentioned stirrer are replaced Open-closure work, the operational mode of reactive tank selects a pattern in inflation or the on-inflatable stirring to move, the inflation at intermittence of inflating repeatedly with the on-inflatable stirring that intersects according to imposing a condition moves down, just use the direct stirring reaction liquid of runner of stirrer, therefore, more save power than indirect stirring reaction liquid by the ejection water spray of squirt pump.
In addition, the stirrer that is provided with in the above-mentioned reactive tank passes through at common following above-mentioned squirt pump Open-closure of running status, air from above-mentioned delivering aerated water stream guiding tube ejection under venting condition is separated into micro bubble and mixing with above-mentioned stirrer, therefore can increase the oxygen transfer efficiency.
Such stirrer and said pump be Open-closure across, or when following pump Open-closure of state that stirrer moves all the time, can omit the above-mentioned air supply valve that setting is made up of self-acting valve.In addition,, regulate when sucking air quantity, also can omit above-mentioned air control valve is set by the drainage water horsepower of above-mentioned frequency modulator control pump.Above-mentioned water spray supply-pipe is discharged the air that is trapped in above-mentioned water spray supply-pipe by above-mentioned injector adverse current by the ventilation hole (air-vent) 6 can discharge bubble is set, and can prevent the dwindling of effective diameter of pipe of above-mentioned water spray supply-pipe thus.
Supplying with the upper air influx of being responsible at above-mentioned air and connect (not diagram) between the mephitic air inflow, implement deodorization functions, is the mephitic air that suction produces from stench generation sources such as thickener and water extracters between wherein mephitic air flows into.In addition, above-mentioned water spray supply-pipe has froth breaking water pipe 24, and the froth breaking water pipe has froth breaking nozzle 25, by reaction solution is dispersed in the water surface, pushes down the bubble that the reactive tank water surface produces, and therefore can omit other froth breaking tanks and froth breaking water pump facility, and is very economical.
[embodiment 2]
Fig. 5 is the concept map of second embodiment of inflation mechanism of the present invention.
Present embodiment is injector and the delivering aerated water stream guiding tube among a plurality of first embodiment of combination, with the embodiment of a pump even large vol inflation mechanism of inflating and stirring in roomy reactive tank.
The water jet inlet 14 of outlet pipe or piped water injection chamber 22 and more than one a plurality of injectors 1 is connected, is arranged near the water surface on reactive tank top, and wherein outlet pipe is to prolong the pump discharge 5 of pump 4 and formation.The air suction inlet of above-mentioned injector is communicated with piped wind box 23, and wherein the piped wind box is connected with the air supply person in charge 11a with volume damper 12 and air supply valve 13.Therefore under the said pump running status, open and close above-mentioned air supply valve, carry out the aerification function at intermittence,, can regulate the DO concentration of reactive tank by the switching degree of above-mentioned air control valve.In addition, above-mentioned piped water injection chamber links to each other with the froth breaking water pipe 24 with froth breaking nozzle 25, pushes down the bubble that produces in the reactive tank.
In addition, in the present embodiment, form horizontal linear, replace curved tube with the pipe arrangement that water injection chamber 22 links to each other by straight tube, reduce the headloss of pipe arrangement, improve with the relief outlet 5 of pump 4 by relief outlet and the above-mentioned piped water injection chamber of lift pump being arranged to lift pump.The method to set up of lift pump can be utilized the support platform or the seston of various ways.Enumerate porose piped support works in the present embodiment in the pump bottom.The pump support can prevent in the hotchpotch inflow pump with perforated pipe 21, compares the degree of depth of drawing water of pump when more effective shortening is safeguarded, maintenance easily when said pump is arranged on the bottom surface.
[embodiment 3]
Fig. 6 is the concept map of the 3rd embodiment of inflation mechanism of the present invention.Present embodiment is the embodiment that stirrer 3a is set on the inflation water spray ejiction opening 19 of the front end of delivering aerated water stream guiding tube 2.
The inflation mechanism of present embodiment is that stirrer forms in combination squirt pump of the present invention and the water.Because the ejiction opening of delivering aerated water stream guiding tube is mainly downward, so the charging efficiency consideration of flowing and causing from spraying water, than the stirrer of suction top, bottom discharge type, preferred top sucks bottom discharge type stirrer.Top sucks bottom discharge type stirrer and stirs with runner 17 with drive-motor 16 rotations, the intake capacity that produces is quickened the ejection flow velocity of inflation water spray importing 2, therefore increase the air intake capacity, bubble in the inflation water spray of ejection and the collision of above-mentioned runner, be separated into micro situation, can improve charging efficiency.
[embodiment 4]
Fig. 7 is the concept map of the 4th embodiment of inflation mechanism of the present invention.
Present embodiment be by delivering aerated water stream guiding tube and injector are concentrated be provided with plural a plurality of, finish jumbo inflation mechanism easily, therefore a plurality of injectors and delivering aerated water stream guiding tube are connected round shape water injection chamber and wind box, constitute the embodiment of large vol inflation mechanism.
Inflation mechanism is made up of above injector 1, pump 4 and a delivering aerated water stream guiding tube 2 etc. with the air supply pipe that is provided with at reactive tank top shoal.Utilizing the water jet inlet 14 of said pump relief outlet 5 and above-mentioned injector to connect into columnar water injection chamber 22a inside respectively is communicated with, the air supply pipe 11 of above-mentioned injector and air supply person in charge 11a connect into the inside of wind box 23a respectively and are communicated with, above-mentioned air is supplied with the opposite side of being responsible for and is communicated with atmosphere, the ejiction opening 19 of above-mentioned delivering aerated water stream guiding tube is arranged on the deep water place, make deep water ejection from the inflation water spray of the spout of above-mentioned injector ejection from reactive tank, be drawn into the above-mentioned delivering aerated water stream guiding tube top of shoal by above-mentioned injector as the air of the little proportion of compressible fluid, the air that is drawn into delivering aerated water stream guiding tube inside flows by it by the reaction solution as the big proportion of incompressible fluid, the ascent rate that compares the micro-air that forms with said pump is forced to carry and be sprayed onto the deep water place of reactive tank bottom quickly, inflatable and stirring reaction liquid.
Here, stirrer 3a is arranged on the ejiction opening of the above-mentioned inflation water spray of the above-mentioned delivering aerated water stream guiding tube front end that the deep water place of reactive tank has, inflation water spray from above-mentioned delivering aerated water stream guiding tube ejection is collided and dispersion with runner with above-mentioned stirring, inflation and stirred tank improve charging efficiency.
Above-mentioned stirrer preferably has cover around runner top sucks the bottom discharge type, because be the ejection flow velocity that can quicken above-mentioned delivering aerated water stream guiding tube.If the drive-motor of above-mentioned stirrer is made up of a plurality of motors, can omit speed reduction unit, the cost saving and the energy, more economically.
Present embodiment is to utilize the pump support with perforated pipe 21 said pump to be set, and pump discharge 5 is connected with water spray supply-pipe 10 with above-mentioned water injection chamber.
[embodiment 5]
Fig. 8 is the concept map of the 5th embodiment of inflation mechanism of the present invention.
Omit pump support perforated pipe and water spray supply-pipe among the 4th embodiment in the present embodiment, pump 4 is fixed on columnar water injection chamber 22a and columnar wind box 23a, the relief outlet 5 of pump directly is connected above-mentioned water injection chamber, so apparatus structure is simple, reduce headloss, more economically.
Utilize to support platform or seston, a side of delivering aerated water stream guiding tube 2 is fixed on the suction port of reactive tank works or stirrer 3a, above-mentioned water injection chamber of opposite side fixed or wind box fixed pump at above-mentioned delivering aerated water stream guiding tube can be arranged on shoal to pump.As present embodiment, when a plurality of delivering aerated water stream guiding tube is set, support platform even omit other, also can be arranged on shoal to the relief outlet of pump, make it structurally stably directly be connected above-mentioned water injection chamber.
Preferably be provided for preventing the screen cloth 26 of hotchpotch inflow here, at pump intake.For pump being arranged on the centre of above-mentioned water injection chamber and wind box, the intermediate fabrication of above-mentioned chamber is become hollow form, when being used to pump is set, therefore the center of gravity that the whole device behind the pump is set, can obtain the not inclined to one side stabilizing deyice of center of gravity also in the centre.
[embodiment 6]
Fig. 9 is the concept map of the 6th embodiment of inflation mechanism of the present invention.This device is the structure of pump turbine room and water injection chamber formation one.
Water injection chamber 22a has pump runner 28 and guide blade 30, and wherein guide blade is converted to the pressure water spray to the speed water spray that the rotation of following this runner forms, and above-mentioned runner directly is connected with drive-motor 29, has pump.The above-mentioned water injection chamber of above-mentioned guide blade outside has injector 1, for water is sprayed, nozzle is connected in wind box 23a inside, sucks air through above-mentioned wind box, and the water spray that is mixed with air is sprayed onto delivering aerated water stream guiding tube 2.
Water injection chamber inside has the pump swiveling wheel by rotation guide blade and drive-motor 29 rotations like this, forms above-mentioned water injection chamber with pump, so the economizer manufacturing cost, and power waste minimizes.In the present embodiment, above-mentioned pump intake upwards considers that still the water spray of entire reaction groove stirs, can be up or down.
[embodiment 7]
Figure 10 is the concept map that the 7th of inflation mechanism of the present invention is executed example.This device is further to have rotating paddle and guide blade in wind box.
Wind box 23a has air-supply runner 31 and guide blade 32, and guide blade 32 is the speed energy transformation that the rotation of following this runner forms a pressure energy.Above-mentioned air-supply directly is connected with the turning axle of runner with above-mentioned drive-motor 29, forms fan.The above-mentioned wind box of the outside of above-mentioned guide blade has air supply pipe 11, around the pipe end of above-mentioned air supply pipe, be provided with from the annular nozzle of water injection chamber 22a ejection current, except the air intake capacity that forms through the said nozzle water spray, air is sent into pressure with runner with above-mentioned air-supply, therefore increased the air feed rate.In addition, the pressure of additional fan is sent in as a kind of inefficient squirt pump in the squirt pump, therefore can improve the inflation dynamic efficiency.
In addition, can establish the motor that drives above-mentioned fan runner 31 in addition, but by the drive-motor of common pump with runner 28, but the manufacturing cost of economizer improves dynamic efficiency.
As mentioned above, the common feature of first to the 7th embodiment of the present invention is, if mainly the above-mentioned air supply valve of being made up of self-acting valve is to form with the ratio control type self-acting valve that the ratio of degree of opening is controlled, can omit above-mentioned air control valve, install simpler.
The common feature of the 3rd to the 7th embodiment is, if the suction port of above-mentioned stirrer is only open and the ejiction opening connection portion of above-mentioned delivering aerated water stream guiding tube, when remaining part was airtight, the intake capacity of stirrer was inflated flowing of water spray and becomes big, therefore can improve charging efficiency.
The common feature of second to the 7th embodiment is, the air supply valve is set in above-mentioned air supply pipe as first embodiment, open and close above-mentioned air supply valve, from inflation or on-inflatable stirring, select a kind of operational mode operation, with timing register, ORP, DO controller interlock, according to the automatic shutter that imposes a condition, can move under the inflated condition at the intermittence that intersection is inflated repeatedly or on-inflatable stirs thus.In addition, air supply pipe has air control valve, and the drive-motor of pump has frequency modulator, can regulate the DO concentration of reactive tank.In addition, above-mentioned air is supplied with the influx be responsible for and is connected with the mephitic air inflow pipe that is used to suck from the mephitic air of stench generation source discharges such as thickener and water extracter, can implement the biology deodorizing.Also identical among the 3rd to the 7th embodiment with first to second embodiment, the vent pipe of above-mentioned water injection chamber or pump also with the froth breaking cross current with froth breaking nozzle, can bring into play their defoaming function simultaneously.
Particularly, in the 4th to the 6th embodiment, externally have other fans, supply with the person in charge by the relief outlet and the above-mentioned air that are communicated with above-mentioned fan, pressure is sent air, increases aeration quantity, can improve the inflation dynamic efficiency.
Enumerate the standard type injector among above-mentioned first to second embodiment and the 4th to the 6th embodiment, enumerate the ring-type injector among the 3rd embodiment and the 7th embodiment, but the injector form of each embodiment without limits, can use.
Figure 11 is about utilizing inflation mechanism function of the present invention, can realizing the embodiment of the method for wastewater treatment of multiple mode treatment process according to running status.The treatment process of present embodiment is constructed as follows: by flow four reactive tanks being connected in series successively that inflation mechanism of the present invention (not diagram) has and carry out the settling tank of solid-liquid separation from the effusive reaction solution of the 4th reactive tank of waste water, and will be transported to the initial reaction groove at the sedimentary activated sludge of settling tank.
According to the variation of following the water temperature variation of seasonal variation, the variation that flows into water quality, fluctuations in discharge, C/N ratio, propagate microorganisms and remove in the waste water waste water treatment process of organism and nutrient salts and can react sensitively, therefore in a fixed technology, be difficult to effectively remove denitrification and phosphorus, also be difficult to remove organism sometimes.
The opening and closing that inflation mechanism of the present invention is used pump by the switching and the inflation of air supply valve, even same facility also can select the running status of first to the 3rd reactive tank operational mode to carry out from inflation or stirring, with timing register, ORP, DO controller interlock, inflate repeatedly or move under the inflated condition intermittence of on-inflatable intersecting according to imposing a condition automatically.Therefore, even do not transform or change the constructional device of waste water disposal facility, also can be according to load variations and seasonal variation, from selecting the operational mode of operational conditionss such as the most suitable inflow water quality and water temperature to move 8 kinds of operational modes shown in the following table 2, therefore the multiple treatment process of plurality of operating modes can be freely selected, inflow condition and climatic conditions change can be successfully managed.
[table 2]
The four-stage that inflation mechanism of the present invention utilizes is the operational mode of gas filling technology intermittently
Operational mode No. First reactive tank Second reactive tank The 3rd reactive tank The 4th reactive tank
1 Intermittently inflation Intermittently inflation Intermittently inflation Inflation (aerobic)
2 Intermittently inflation Inflation (aerobic) Intermittently inflation Inflation (aerobic)
3 Inflation (aerobic) Intermittently inflation Intermittently inflation Inflation (aerobic)
4 Intermittently inflation Inflation (aerobic) Inflation (aerobic) Inflation (aerobic)
5 On-inflatable Intermittently inflation Intermittently inflation Inflation (aerobic)
6 On-inflatable Inflation (aerobic) Intermittently inflation Inflation (aerobic)
7 On-inflatable Inflation (aerobic) On-inflatable Inflation (aerobic)
8 Inflation (aerobic) Inflation (aerobic) Inflation (aerobic) Inflation (aerobic)
To one explanation of the simple do of above-mentioned operational mode, first operational mode is made up of the inflation at intermittence and the aerobic technology of three phases, carry the oxynitride in mud or the delivered inside water in first to the 3rd reactive tank, to stir, give birth to the denitrification reaction of breathing before this operational mode is equivalent to carry out in denitrification reaction and the microorganism and under the aerobic condition of inflation, carry out basic operational mode nitrated and that organism decomposes at on-inflatable.
Second to the 4th operational mode than first operational mode be more suitable for water temperature low, flow into T-N concentration high, need to prolong the operational mode when being used for nitrated aerobic condition.Wherein, the 3rd operational mode is equivalent to a kind of so basic operational mode: it is high and can be used for the easy decomposed organic concentration of dissolved oxygen of denitrification reaction when low to flow into concentration at ammonium-nitrogen, in first reactive tank, preceding denitrification reaction is inflated, mainly carry out nitration reaction, and second and third reactive tank injects external carbon source when on-inflatable stirs, and carries out denitrogenation.
The the 5th to the 7th operational mode is that an inflow organism utilizes the operational mode at preceding denitrification reaction to greatest extent, be equivalent under easy decomposed organic concentration Gao Erke easily is used in situation in the denitrification reaction operational mode of denitrification reaction before being used to increase.Wherein, the 6th operational mode is further to prolong the operational mode that is used for nitrated aerobic condition.
Denitrification reaction increased the mud feed flow and replenishes delivered inside before above-mentioned the 5th to the 7th operational mode was used to.But, be preceding denitrification reaction when carrying too much mud, mud is outer destroyed in the settling tank, reduce the solids collection effciency, so the internal recycling device be set, reaction solution effectively from the 4th reactive tank internal recycling to first reactive tank.Internal recycling to first reactive tank is suitable for above-mentioned the 5th to the 7th operational mode that common first reactive tank moves under non-inflated state, in the first, the 3rd, the 4th operational mode, first reactive tank can be applicable to the on-inflatable whipped state with limitation.
In addition, the 7th operational mode is attached to utilize and flows in the organic preceding denitrification reaction, in the 3rd reactive tank additional external carbon source, carry out the back denitrification reaction simultaneously, so it is to be applicable to the operational mode that flows into the insufficient operational conditions of organism when can carrying out nitration reaction well.
The 8th operational mode is that the interim population in small and medium-sized cities sharply increases in denitrogenation when causing that offered load is too much, the dephosphorisation reaction and inflates during for the low water temperature of freeze-up or Holidays, and the operational mode of mainly carrying out the aerobism reaction for the decomposition of organism aerobism and nitration reaction, be equivalent to the operational mode of general in the past activated sludge technology.
In above-mentioned waste water treatment process, for make the first reactive tank condition be operational mode that anaerobic or anaerobic condition stir usually be for flow into organism be used in denitrification reaction preceding denitrification reaction carry out pattern.The inflation at intermittence of inflating repeatedly with the on-inflatable stirring that intersects is in order also to be used in denitrification reaction give birth to the organism of breathing generation in the microorganism when on-inflatable stirs, therefore in order to carry out effective denitrogenation and dephosphorisation reaction, must pay attention to organic quality and quantity.
Insufficient organism can replenish by industrial methyl alcohol and pyruvic acid in denitrogenation and the dephosphorisation reaction, and its operation and management still need too much expense easily.Therefore, the organic acid that the former mud that utilization produces from initial settling tank ferments and produces, or the organic acid that ferments of the organic waste etc. that utilizes former rubbish such as leftovers, animal waste, collection ight soil, industrial plant, or remove hotchpotch and the material pulverized directly utilizes behind pretreatment technology.The fermented liquid of the easy decomposability lower-molecular substance that utilization generates these organic waste fermentations helps denitrogenation and dephosphorisation reaction, reduces the capacity of reactive tank.
Nearly all organic waste such as leftovers is in discharge and collection process, a part rots to be converted to the dissolved oxygen organic matter of the small molecular weight of easy decomposability, with solid organic matters blended state under be transported to and handle, therefore do not need to select dissolved oxygen organic matter and solid organic matters, direct fermentation in fermenter, this moment, easily decomposed organic nearly all was decomposed into CO 2, H 2O, CH 4Deng and be consumed.Therefore, utilize diluting in inputs such as the leftovers inflow waste water of collecting, carry out solid-liquid separation at initial settling tank, the dissolved oxygen organic matter is dissolved in the supernatant water of initial settling tank, is used for preceding denitrification reaction in above-mentioned first reactive tank, and organic property solids separates with former mud coprecipitation in initial settling tank, reclaim the back and in fermenter, carry out organic acid fermentation, inject above-mentioned first reactive tank, be used in preceding denitrification reaction, or inject the second or the 3rd reactive tank, be used for the back denitrification reaction.
In addition, if in above-mentioned reactive tank, fill easily microorganism absorption breeding be the biofilm carrier of biological membrane stage, even the reactive tank of low capacity also can keep high treatment efficiency, wherein microorganism is to keep high density, breeding coefficient nitrated microorganism little, that clean easily.
The waste water treatment process of Figure 11 of the present invention uses device that processing efficiency is verified by the described operational mode of table 2 with the test of the described specification of table 3.And, in the reactive tank of above-mentioned test usefulness, the moving phase biofilm carrier is filled 180 in each reactive tank, fill 720 altogether, C waste water processing station at Jiang Yuandao experimentizes, and wherein the moving phase biofilm carrier is to fill 800cm respectively in diameter 200mm spherical porous PP shell 3The moving phase biofilm carrier of PVDC LOCK.It the results are shown in following table 4 to table 7, can confirm thus T-N, T-P to remove efficient very good.
[table 3]
Unit process specification (unit: length-m, the capacity-m of testing apparatus 3)
Title Initial settling tank Reactive tank Settling tank The mud fermenter Solid-liquid separation tank
Specification φ1.8×H2.4 ??W1.5× ??L2.0×H2.4 φ2.8×H2.2 ?W1.2×L0.9 ?×H1.5 φ0.8× H1.5
Useful capacity 5.1 ??24.0 12.3 ?1.4 0.58
The waste water treatment process of Figure 11 of the present invention is intermittently to inflate and aerobic technology with three phases by first operational mode in the described operational mode of table 2, omit and inject the external carbon source that contains former mud fermented liquid, its actual result is as shown in table 4 below, it is good that organism and T-P remove efficient, and it is 57.8% that T-N removes efficient.
[table 4]
First operational mode (not injecting external carbon source) experimental example (unit: water quality mg/l, efficient %)
Classification Operational conditions and processing efficiency
Operational conditions The reactive tank total holdup time 6.01 hour
Fermentation mud character ????-
Fermentation mud injection rate ????-
The MLSS mean concns ????5,180mg/l
The reactive tank water temperature ????13.0℃
The C/N ratio ????8.2BOD/T-N
Operation result Project ????BOD ????CODMn ????SS ????T-N ????T-P
Flow into water quality ????270.0 ????122.0 ????315.0 ????32.9 ????9.2
Flow out water quality ????8.0 ????11.9 ????10.5 ????13.9 ????0.8
Remove efficient ????97.0 ????90.2 ????96.7 ????57.8 ????91.3
In the table 5 of bottom processing efficiency be the technology of Figure 11 with the operation of described first operational mode of table 2,5 days the organic acid fermentation liquid of former mud normal temperature fermentation that will draw from initial settling tank is injected into the experimental result these two reactive tanks respectively when second reactive tank that moves in inflation at intermittence mode and the 3rd reactive tank are in the on-inflatable whipped state.If according to the experimental result of like that the mud fermented liquid being injected shown in the table 5, the total holdup time of reactive tank is identical with the experimental result of table 4, (45.4mg/l>32.9mg/l) and C/N are than (BOD/T-N) little (3.96<8.2) no matter T-N concentration height, injection by former mud fermented liquid, T-N removes efficient and increases to 66.3% from 57.8%, and T-N removes concentration and increases to 30.1mg/l (45.4~15.3) significantly.
[table 5]
First operational mode (replenishing the mud fermented liquid) experimental example (unit: water quality mg/l, efficient %)
Classification Operational conditions and processing efficiency
Operational conditions The reactive tank total holdup time 6.01 hour
Fermentation mud character ??TVA1,500mg/l
Fermentation mud injection rate Second reactive tank 101/ hour, the 3rd reactive tank 101/ hour,
The MLSS mean concns ??4,190mg/l
The reactive tank water temperature ??15.40℃
The C/N ratio ??3.96BOD/T-N
Operation result Project ??BOD ????CODMn ????SS ????T-N ????T-P
Flow into water quality ??180.0 ????83.0 ????260.0 ????45.4 ????6.9
Flow out water quality ??5.0 ????8.6 ????3.2 ????15.3 ????0.6
Remove efficient ??97.2 ????89.0 ????98.8 ????66.3 ????91.3
Following table 6 is that the technology of Figure 11 is moved with described second operational mode of table 2, will be injected into the experimental result of the 3rd reactive tank under the on-inflatable whipped state that moves in inflation at intermittence mode from 5 days the organic acid fermentation liquid of former mud normal temperature fermentation that initial settling tank is drawn.
In this experimental example, flow into T-N concentration for improving, second reactive tank is selected second operational mode of operation under the common aerobic condition, prolong and be used for nitrated aerobic conditions, former mud fermented liquid is injected in inflation at intermittence mode moves and be in the 3rd reactive tank under the on-inflatable whipped state, be used for denitrogenation and dephosphorisation reaction, therefore with the operation example of table 5, no matter T-N concentration height (69.2mg/l>45.4mg/l), T-N remove concentration be 55.3mg/l (69.2~13.9), T-N to remove efficient be 79.9%, processing efficiency is very high.The result of table 6 be under the operational mode of table 5 aerobic time short and because of injecting organic loading that former mud produces is overweight to be made nitrated insufficiently, therefore change to second operational mode, suitably adjust fermentation mud injection rate, improve the result of processing efficiency.Method of wastewater treatment of the present invention like this is by C/N ratio and T-N concentration, and selected optimal operational mode is adjusted and flowed into organic injection rate, can guarantee good water quality treatment.
[table 6]
Second operational mode (replenishing the mud fermented liquid) experimental example (unit: water quality mg/l, efficient %)
Classification Operational conditions and processing efficiency
Operational conditions The reactive tank total holdup time 5.81 hour
Fermentation mud character ?????????TVA?1,500mg/l
Fermentation mud injection rate During the 3rd reactive tank on-inflatable 71/ hour,
The MLSS mean concns ?????????4,500mg/l
The reactive tank water temperature ?????????14.5℃
The C/N ratio ?????????2.75BOD/T-N
Operation result Project ??BOD ??CODMn ????SS ??T-N ????T-P
Flow into water quality ??190.0 ??172.0 ????444.0 ??69.2 ????12.5
Flow out water quality ???6.0 ??10.0 ????8.0 ??13.9 ????0.4
Remove efficient ???96.8 ??94.2 ????98.2 ??79.9 ????96.8
Below table 7 be that the technology of Figure 11 is moved with described the 6th operational mode of table 2, will be injected into from the organic acid fermentation liquid of former mud normal temperature fermentation after 5 days that initial settling tank is drawn in inflation at intermittence mode and move and be in experimental result the 3rd reactive tank under the on-inflatable whipped state.
In the present embodiment, no matter T-N very high concentrations (61.8mg/l) and inflow C/N are than (BOD/T-N) little (3.23), by first reactive tank is under anaerobic moved, the preceding denitrification reaction and the dephosphorisation reaction that fermented liquid are used for carrying the oxynitride that mud contains, under the on-inflatable whipped state of the 3rd reactive tank, drop into the mud fermented liquid, carry out the back denitrification reaction simultaneously, thus T-N is removed efficient and bring up to 80.6%, dephosphorization efficient increases substantially, and reaches 98.3%.
[table 7]
The 6th operational mode (replenishing the mud fermented liquid) experimental example (unit: water quality mg/l, efficient %)
Classification Operational conditions and processing efficiency
Operational conditions The reactive tank total holdup time ????101m 3/ day (the total HRT:601rs of reactive tank)
Fermentation mud character ????TVA?1,200mg/l
Fermentation mud injection rate During the 3rd reactive tank on-inflatable 71/ hour,
The MLSS mean concns ????4,190mg/l
The reactive tank water temperature ????15.4℃
The C/N ratio ????3.23BOD/T-N
Operation result Project BOD ?CODMn ????SS ??T-N ????T-P
Flow into water quality 190.0 ?172.0 ????444.0 ??69.2 ????12.5
Flow out water quality 6.0 ?10.0 ????8.0 ??13.9 ????0.4
Remove efficient 96.8 ?94.2 ????98.2 ??79.9 ????96.8
In addition, in the method for wastewater treatment of Figure 11 of the present invention of above-mentioned explanation, the inflation mechanism that is arranged on reactive tank inside is not limited to inflation mechanism of the present invention, applicable have inflation and stir in select a pattern and intersect the inflation mechanism that inflation repeatedly and on-inflatable stir according to imposing a condition with aerification function at intermittence.This is also included within the scope of the present invention, therefore enumerates its exemplary embodiments, and the patent that can utilize the applicant to invent is registered the inflation mechanism at intermittence of disclosed Fig. 1.
Figure 11 a be in the waste water treatment process of Figure 11, be suitable for Fig. 1 intermittence inflation mechanism embodiment.Inflation mechanism comprises that Aeration in the water machine 34, air supply pipe 11 and air are supplied with and is responsible for 11a, and wherein to have the air dispersion of sending into above-mentioned reactive tank inside with pressure be micro bubble and blended runner to Aeration in the water machine 34; Air supply pipe 11 has the air supply valve 13 of air distribution in the above-mentioned Aeration in the water machine that each reactive tank is provided with; Air is supplied with to be responsible for to concentrate and is connected above-mentioned air supply pipe, and its opposite side is connected with the relief outlet of fan 33.When opening above-mentioned air supply valve, under the inflated condition that keeps aerobic condition, move, when closing above-mentioned air supply valve, under the whipped state that keeps anaerobic or anaerobic condition, move, inflate the intermittence of stirring according to imposing a condition repeatedly in intersection and select a kind of mode operation in the inflated condition, therefore according to the optimal a kind of mode operation in the easy option table 2 described eight kinds of operational modes of operational conditions with on-inflatable.
Figure 11 b be have stirrings by on the fan of mode in the past and the inflation mechanism that dispersion pipe is formed stirrer being set further, forming in the waste water treatment process of Figure 11, inflation, intermittence aerification function inflation mechanism, be applicable to the embodiment of method of wastewater treatment.
Above-mentioned intermittence, inflation mechanism was made up of dispersion pipe 35 and stirrer 3, and wherein dispersion pipe is to spray with micro bubble to the air that the reactive tank internal pressure is sent into, and stirrer is used for stirring reaction liquid.By being in operation under the open mode being arranged at air supply valve 13 on the air supply pipe 11, from above-mentioned dispersion pipe ejection air, under the inflated condition that keeps aerobic condition, move, and by be in the operation under the closing condition at air supply valve 13, termination is from above-mentioned dispersion pipe ejection air, make the stirrer operation, under the whipped state that keeps anaerobic or anaerobic condition, move, open and close above-mentioned air supply valve according to imposing a condition, carry out repeatedly from the process of dispersion pipe ejection air and termination, inflate the intermittence of stirring repeatedly and select a kind of pattern to move in the inflated condition intersecting, therefore according to the operational conditions optimal a kind of mode operation in eight kinds of operational modes described in the option table 2 easily with on-inflatable.
Figure 11 c further is provided with stirrer in the waste water treatment process of Figure 11 in the surperficial inflator of mode in the past, thus form have stirrings, inflation, intermittence aerification function inflation mechanism and be applicable to the embodiment of method of wastewater treatment.
Above-mentioned intermittence, inflation mechanism was further to be made up of surperficial inflator 36 and stirrer 3, and wherein surperficial inflator is by runner inflation and stirring reaction liquid in the rotation of the reactive tank water surface, and stirrer is used for stirring reaction liquid.When the above-mentioned surperficial inflator of operation, keeping the inflated condition operation of aerobic condition, and when ending the operation of above-mentioned surperficial inflator and moving above-mentioned stirrer, keeping the whipped state operation of anaerobic or anaerobic condition, during according to above-mentioned surperficial inflator of the crossing operation that imposes a condition and stirrer, move by opening and closing repeatedly, inflation repeatedly and on-inflatable stir intermittently select a kind of operational mode operation the inflated condition from intersecting, so according to the operational conditions optimal a kind of mode operation in option table 2 described eight kinds of operational modes easily.
In the technology shown in above-mentioned Figure 11 to Figure 11 c, contain too much dissolved oxygen in order to prevent that nitrated and denitrification reaction or mud from carrying in quantity and the internal recycling water, the 4th reactive tank also has the aerification function inflation mechanism at intermittence of above-mentioned Figure 11 to Figure 11 c, intersects according to imposing a condition to inflate the inflated condition operation at intermittence of stirring with on-inflatable repeatedly.But because the 4th reactive tank is the end reaction groove, when the on-inflatable churning time was long, silt deposit efficient reduced in settling tank, did not therefore preferably prolong the on-inflatable churning time.
The present invention relates to from the waste water processing station or method that the waste water that discharges the fish farming field is handled, according to the conditions such as the variation of waste water water temperature, offered load or change of water quality of following seasonal variation, a plurality of reactive tanks are inflated or the on-inflatable stirring, reactive tank is intersected repeatedly under aerobic condition or anaerobism (anaerobic) condition, improve processing efficiency thus.

Claims (13)

1. has stirring, the inflation mechanism of inflation and aerification function at intermittence, it is characterized in that, it is by an above injector, pump and delivering aerated water stream guiding tube are formed, wherein injector has the air supply pipe that the shoal on reactive tank top is provided with, pump has suction port and ejiction opening, the ejiction opening of said pump and the water jet of above-mentioned injector inlet respectively with the water injection chamber internal communication, the air supply pipe of above-mentioned injector and air are supplied with and are responsible for respectively and the wind box internal communication, above-mentioned air is supplied with the opposite side of being responsible for and is communicated with atmosphere, the ejiction opening of above-mentioned delivering aerated water stream guiding tube is arranged on the deep water place of reactive tank bottom, make deep water ejection from the inflation water spray of the spout of above-mentioned injector ejection from reactive tank, therefore be drawn into the above-mentioned delivering aerated water stream guiding tube top of shoal with above-mentioned injector as the air of the little proportion of compressible fluid, be drawn into air utilization the flowing of the inside on delivering aerated water stream guiding tube top as the reaction solution of the big proportion of incompressible fluid, ascent rate than the micro-air that forms with said pump is forced to transport and be ejected into deep water place, reactive tank bottom quickly, thus to reactive tank inflation and stirring.
2. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, on the above-mentioned air supply person in charge, the air supply valve is set, on-off action by this valve, select a kind of operational mode operation in the stirring of inflation and on-inflatable, described air supply valve and timing register, ORP or DO controller interlock repeat to open and close above-mentioned air supply valve automatically by imposing a condition, inflate the intermittence of stirring with on-inflatable repeatedly in intersection and move under the inflated condition.
3. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, in the drive-motor of said pump, frequency modulator is set, change the rotation number of above-mentioned drive-motor by frequency modulation, regulate flow and the pressure of supplying with above-mentioned injector, thereby regulate the oxyty of air imbibed quantity and reactive tank.
4. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, supplies with at above-mentioned air to have air control valve in being responsible for, and comes the oxyty of conditioned reaction groove by the switching degree of air control valve.
5. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, supply with the influx of being responsible at above-mentioned air and be connected with the mephitic air inflow pipe, thereby have deodorization functions, described air inflow pipe sucks the mephitic air that produces from stench generation source.
6. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that the vent pipe of above-mentioned water injection chamber or pump is connected with the froth breaking water pipe with froth breaking nozzle, thereby has their defoaming function.
7. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, the ejiction opening of the front end of the above-mentioned delivering aerated water stream guiding tube that has at reactive tank deep water place is provided with stirrer, make from the runner collision of the inflation water spray of above-mentioned delivering aerated water stream guiding tube ejection and above-mentioned stirrer and disperse, thereby to the reactive tank inflation with stir.
8. claim 7 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, start by said pump and shutdown are switched the inflation of reactive tank and the on-inflatable a kind of operational mode in stirring and are moved, described pump and timing register, ORP or DO controller interlock, by the automatic shutter said pump that imposes a condition, move under the inflated condition thereby inflate the intermittence of stirring repeatedly with on-inflatable in intersection.
9. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, the runner and the guide blade of pump are set in above-mentioned water injection chamber inside, the runner of this pump drives with drive-motor, this guide blade is converted to pressure head to velocity head, thereby has the pump function of pressure water spray at the water jet inlet of injector.
10. claim 1 is described has stirring, inflation and an inflation mechanism of aerification function intermittently, it is characterized in that, replace curved tube with the water spray supply-pipe that above-mentioned water injection chamber influx is connected with straight tube with the ejiction opening of pump, to reduce headloss, by upholder being set in the said pump bottom, the relief outlet of said pump is arranged on position with the water jet inlet level of above-mentioned injector, and near the water surface, described upholder is made up of the perforated pipe with screen filtration function.
Have stirring, inflation and the inflation mechanism of aerification function intermittently 11. claim 1 is described, it is characterized in that said pump is fixed in above-mentioned water injection chamber and the wind box, the relief outlet of said pump directly is connected with above-mentioned water injection chamber.
Have stirring, inflation and the inflation mechanism of aerification function intermittently 12. claim 1 is described, it is characterized in that, above-mentioned wind box inside is provided with the runner and the guide blade of fan, the runner of this fan drives with drive-motor, this guide blade is converted to blast to wind speed, thereby has the air-supply function that pressure is sent into air at the air supply pipe of pump.
Have stirring, inflation and the inflation mechanism of aerification function intermittently 13. claim 12 is described, it is characterized in that above-mentioned air-supply directly is connected with the runner drive-motor with pump with runner, blow with runner and pump runner thereby drive simultaneously with a motor.
CNB031564860A 2003-05-07 2003-09-01 Aerator and advanced waste water treatment method using the same CN1326783C (en)

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CN1548384A (en) 2004-11-24
KR100581752B1 (en) 2006-05-22

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