CN103435157B - Low-energy and intelligent three-dimensional ecological internal circulation nitrification method and apparatus - Google Patents

Abstract

The invention relates to a low-energy and intelligent three-dimensional ecological internal circulation nitrification method and apparatus for upgrading and reconstruction of a sewage treatment system. A contact oxidation tank for sewage treatment is changed into a sedimentation tank. A solar power installation and wind driven generators are disposed for providing energy for system operation. The sedimentation tank is provided with at least one three-dimensional ecological internal circulation nitrification processing unit; each unit is divided into an ecological deodorization zone and a circulation nitrification reaction zone from top to bottom; each reaction zone is divided into an aerobic zone and a facultative sedimentation zone from inside to outside, and the aerobic zones are provided with aeration components. Flow rate, dissolved oxygen, temperature and sludge concentration in the tank during sewage treatment are controlled, so that the sewage can circularly flow for a plurality of times between the aerobic zone and the facultative sedimentation zone to form partial nitrification and denitrification for consuming endogenous carbon source. Finally, a supernatant flows out from a water outlet. The aeration power allows the sewage flowing circularly among every zone to realize circulating nitrification, so that pollutants can be effectively removed and the sewage can be discharged by meeting standard indexes such as deodorization, nitrogen and phosphorus removal and total nitrogen in upgrading and reconstruction of municipal sewage plants.

Description

Smart three-dimensional ecological internal circulation nitrifying method and device

Technical field

The present invention relates to field of waste water treatment, be specifically related to the upgrading for Sewage treatment systems, in particular in upgrading and reconstructing urban sewage factory to the strict ecological purification treatment process of the discharge indexs such as deodorizing dephosphorization denitrogenation and total nitrogen and the device adopting the method design.

Background technology

Major river valley water pollutions result of appraisal display in 2008, major river valley ammonia nitrogen is 18.9% and 22.1% more than the section ratio of V class standard value, and ammonia nitrogen has exceeded chemical oxygen demand (COD) (COD) and become the primary index affecting surface water quality of water environment.In the environmental protection planning of country " 12 ", kind principal pollutant being carried out to overall control will be increased." 12 " period, while continuation advances the work of chemical oxygen demand (COD) (COD) pollution emission reduction, be necessary ammonia nitrogen to be included in the restrictive control objectives of the main Sewage Water Emissions in the whole nation, by Sewage treatment systems upgrading, improve life source ammonia nitrogen removal efficiency, catch the key industrys such as chemical industry, papermaking, food-processing simultaneously, be aided with agricultural sources prevention and cure of pollution, can effectively control ammonia nitrogen total emission volumn.

Urban sewage treatment system is one of these major measure polluted of control, existing century-old developing history.Urban sewage treatment process also experienced by three developing periods: sewage one-level place buries, sewage second-level process, tertiary sewage treatment.In sewage treatment facility, the source of foul smell mainly sewage pretreatment part (grille well, lift pump room water collecting basin, settling pit, anoxic pond and Aerobic Pond) and sludge treatment part (between mud storage pool, dehydration etc.), is the emphasis of deodorizing.

Specifically mainly contain the feature that following several technology has compound Sustainable development to urban sewage treatment process technology:

(1) Anammox; (2) synchronous nitration. denitrification; (3) short distance nitration. denitrification; (4) denitrification phosphorus-collecting; (5) endogenous carbon source Simultaneous Nitrification one denitrification (SND) is consumed; Etc..

According to the character of water pollutant and the feature in subtractive process, pollutent in sanitary sewage is divided three classes by usually: organic carbon pollutant, nitrogen-containing pollutant, containing phosphor contaminant: corresponding pollutant removing process adopts the biomineralization of organic carbon (organic carbon is transformed into carbonic acid gas) usually, nitrification and denitrification (nitrogenous compound is transformed into nitrogen) and biological dephosphorization (P contained compound being transformed into insoluble inorganic phosphate precipitation).Because the biological species of above-mentioned three processes is different, biological characteristics is different, and the processing unit of employing and process are not identical.People consider the difference of each section of biological characteristics the earliest, adopt the treatment process that the many equipment of multistage controls respectively, as: aerobic (removing carbonaceous organic material) aerobic (nitrated) anaerobism (denitrification), although this technique is convenient to control, microorganism can be made to be in optimum growh state, but add processing cost owing to needing supplementary new carbon source during anaerobic denitrifying, invest because treatment process is longer larger simultaneously, people develop again rearmounted nitration processes for this reason: anaerobism (denitrification) aerobic (de-organic carbon) aerobic (nitrated) is back to anaerobism section (partial discharge), in this technology utilization sewage, original carbon source is as the denitrifying energy, eliminate the new carbon source needing to add, but face the problem of backflow, the first adds power consumption, two are reduction of denitrification percent, because denitrification percent is directly related with recurrence rate, the denitrification percent reaching 90% just needs 9 times of quantity of reflux, power consumption and volume of equipment increase all greatly, investment and working cost do not reduce according to the set goal, the shortcoming of above-mentioned three kinds of technological processs is implemented in order to overcome segmentation subset, sequencing batch active sludge SBR technique obtains common concern, which simplify technological process and equipment, above-mentioned three processes are completed by controlling different operating parameterss in a single devices, but, it sacrifices top condition and the stability factor thereof of microorganism growth, in fact make various microorganism growth in a single devices, the different a certain classes of time chien shih grows fast and another a few class is suppressed, alternate run successively, total biological efficiency does not reach good order and condition.Simultaneously in order to realize the continuity of sewage treatment process, have to adopt multiple single devices alternately to intake cycling service, its plant factor is lower, floor space and investment strengthen, wherein biology does not reach Optimal State is also cause volume of equipment load not high, needs one of the major reason compared with large equipment volume.Can in a single devices, realize continuous print and take off organic carbon, denitrogenation, dephosphorization be the hot issue that people study always.

M.Ros and J.Vrtovsek have studied a kind of anaerobism. anoxic. and aerobic integratedization sewage disposal device, its main body experimental installation is a cylindrical pad tower reactor, tower body is due to control realization three oxygen characteristic subregions of oxygen supply position and quantity of reflux: bottom l/4 is anaerobism section (void tower), middle part 1,4 is anoxic section (having filler), and top 1/2 is aerobic section (having filler); Sewage enters reactor from bottom, and first by anaerobic zone, top, anaerobic zone has refluxing opening that the sewage after part anaerobic treatment is turned back to pool of spouting; Sewage after anaerobic treatment then upwards enters into oxygen-starved area, and the source of oxygen-starved area trace dissolved oxygen realizes by being back to bottom oxygen-starved area water part, aerobic zone; Sewage after the process of oxygen-starved area then upwards enters into aerobic zone, the dissolved oxygen of aerobic zone derives from the oxygen supply equipment be located at bottom aerobic zone. in the reactor, bottom is equivalent to UASB, filler is not set, rely on anaerobic grain sludge to realize acidification hydrolization and deviate from organic carbon pollutent, the suspension of particle is controlled by the quantity of reflux of anaerobism section itself.Anoxic section major function is denitrification, its carbon source can be hydrolyzed by anaerobism section the micromolecular compound produced easily and provide, nitrifying process then completes at aerobic section, and be incorporated into anoxic section by backflow, its primary process is similar to foregoing forward type biological denitrification process.Although this technique achieves serialization single devices anaerobism. anoxic. aerobic sewage treatment process, but self backflow of anaerobism section needs power wheel drive, aerobic section is to the backflow also consumption of power of anoxic section, the requirement of forward type denitrification to high reflux ratio simultaneously is not eliminated. and high reflux ratio will bring high-solubility oxygen, makes anoxic section operating parameters control not easily to stablize.

S.H.Chuang, ete. another anaerobism one anoxic one aerobic integratedization sewage disposal device is developed, its main equipment is three troughs adjacent one another are of horizontal positioned, first groove is anaerobism groove, second groove is anoxic groove, 3rd groove is aerobic slot, sewage enters reactor from anaerobism groove, and overflow backward successively, anaerobism groove and anoxic groove all arrange and stir with reinforcing mass transfer process, anaerobism groove is by air oxygen supply and realize whipping process, aerobic slot is also provided with pneumatic blodisc, to improve processing efficiency, simultaneously, its denitrification process still relies on aerobic slot effluent recycling to realize to anoxic groove.This reactor does not fundamentally overcome the defect of previous reaction device, and on the contrary, the stirring of anaerobism and anoxic groove turn increases power consumption, and Denitrification rate still controls by quantity of reflux, and the impact of quantity of reflux on dissolved oxygen still exists.

Except forming as far as possible except integration apparatus on structure of reactor, the reaction conditions studying optimization in separating device is also reduce sewage disposal device cost, saves the importance of working cost.Ruey.Fang Yu, ere. have studied and implement the feasibility that on-line Control carrys out enhanced sewage processing efficiency in Continuous Flow SBR system, its selected controling parameters comprises redox potential (OPR), potential of hydrogen 0H), dissolved oxygen (DO), sludge concentration (MLSS), and carry out data processing and control with computer.Above-mentioned four kinds of parameters are to optimization biological growth conditions, control various biochemical reaction process to have very important significance, especially based on the Controlling System of neural network, hydraulic detention time and aerobic power consumption can be greatly reduced: the residence time aerobic saving 45%, anoxic saves 15.5%, total residence time saves 23.75%, aerobic energy-conservation up to 45%.

A large amount of Research And Engineering practice shows, realize the aerobic three kinds of states of anaerobism one anoxic one and decarburization one denitrogenation one dephosphorization three kinds of innoxious processes, liquid return is inevitable link, simultaneously oxygen supply aeration is also absolutely necessary process, both need the consumption of power, both can be combined is energy-conservation key issues.Airlift bioreactor is the biochemical reactor widely applied in biological fermentation in recent years, also in aerobic sewage treatment process, obtains application (fluidized-bed wastewater treatment biochemical reactor) simultaneously.

Guo--Qing Li.etc. have studied the mass transfer of stickiness non-Newtonian fluid in internal circulation gas-lift type bio-reactor and gas-liquid cycle problem, determines gas-liquid oxygen transfer rate constant Kla and other kinetic parameters.Taku Fujiwara, ete. have studied (such as the inner and outer pipes diameter ratio of various parameter in baffling tubular reactor, liquid circulation velocity etc.) to the organic carbon (TOC) in sanitary sewage disposal, total nitrogen (TN), the impact of the decreasing ratio of dissolved nitrogen (DN).Above-mentioned research work focus on strengthening gas-liquid mass transfer effect, improve uniprocessing efficiency, but for comprehensive dynamic efficiency and anaerobism. anoxic process does not relate to.

The treatment process that current domestic town sewage treatment system adopts, ammonia nitrogen, total nitrogen removal efficiency is on the low side, particularly total nitrogen, clearance efficiency is generally lower than 80%, in order to the environmental requirement of satisfied country " 12 ", imperative to municipal sewage system upgrading, and Sewage treatment systems upgrading faces two kinds of approach, one is to Sewage treatment systems dilatation, two is need develop new high-efficiency denitrogenation material and to the technique very efficiently such as deodorizing dephosphorization denitrogenation and total nitrogen, but needs regular hour and higher manpower and materials cost like this.

Summary of the invention

The object of the invention is to overcome prior art defect, providing one can comprehensive China's different geographical, dissimilar Small Urban sewage discharge feature, for discharge indexs such as deodorizing dephosphorization denitrogenation and total nitrogens not up to standard and design for the stereo ecological internal recycle nitrifying method in Sewage treatment systems upgrading process and adopt the method design stereo ecological internal recycle nitrification installation.

The smart three-dimensional ecological internal circulation nitrifying method of the Sewage treatment systems upgrading that the present invention proposes is that the contact-oxidation pool of sewage disposal is transformed into settling tank, and roof solar power generation assembly is set above this settling tank, periphery arranges aerogenerator, to generate electricity to whole operation of sewage disposal system, in described settling tank pond, at least one stereo ecological internal recycle nitration treatment unit is set, each stereo ecological internal recycle processing unit is embarked on journey according to application place, in column or in array format, and ecological deodorizing district and circulation nitration reaction district are set from top to bottom at each described stereo ecological internal recycle de-nitrification unit, described ecological deodorizing district is provided with plant basket, is positioned at above described circulation nitration reaction district, described circulation nitration reaction district is arranged at a circulation and holds concurrently in oxygen case, oxygen case from-inner-to-outer of this circulation being held concurrently is divided into aerobic zone and double oxygen negative area, the hold concurrently central zone of oxygen case of described circulation is described aerobic zone, in described aerobic zone, aeration element is set, its top is communicated with described double oxygen negative area, and bottom is provided with internal recycle water inlet, the top of holding concurrently in oxygen case in described circulation is vertically installed with diaphragm, described plant basket bottom is fixed in this diaphragm upper end, lower end extends to described double position, oxygen negative area and is in same level position with described aeration element, introduce the flow during sewage disposal in controller control pond, the content of dissolved oxygen, temperature in pond and sludge concentration, sewage is introduced described aerobic zone by water inlet pipe, then make described aerobic zone fluid density lower than described double oxygen negative area by the aeration effect of aeration element, with the density difference that both formation is interval, liquid between Shi Liangge district produces flowing, make aerobic zone fluid density lower than double oxygen negative area by the castering action of aeration element, the density difference that both formation is interval, again aerobic zone is reentered by the Involving velocity of aeration element after making the liquid of aerobic zone enter double oxygen negative area, make multiple stereo ecological internal recycle de-nitrification unit under continuous running status, the Gradient distribution of dissolved oxygen can be realized in oxygen case is held concurrently in circulation, form the short distance nitration consuming endogenous carbon source. anti-nitration reaction, sewage after nitration reaction flows out the settling tank outside internal recycle nitration treatment unit, supernatant liquor is finally flowed out by water outlet.

The Sewage treatment systems smart three-dimensional ecological internal circulation nitrification installation that the present invention proposes is that the contact-oxidation pool of sewage disposal is transformed into settling tank, and above this settling tank, be provided with roof solar power generation assembly and this settling tank periphery arranges aerogenerator, controlled by master controller; At least one stereo ecological internal recycle de-nitrification unit is provided with in described settling tank, each stereo ecological internal recycle processing unit is embarked on journey according to application place, in column or in array format, and each described processing unit stereo ecological internal recycle de-nitrification unit is divided into ecological deodorizing district and circulation nitration reaction district from top to bottom, described circulation nitration reaction district from-inner-to-outer is divided into aerobic zone and double oxygen negative area, described ecological deodorizing district is provided with plant basket, be positioned at above described circulation nitration reaction district, in described plant basket, plantation has water to support plant; Described circulation nitration reaction district is arranged at a circulation and holds concurrently in oxygen case, this circulation oxygen case central zone of holding concurrently is described aerobic zone, aeration element is provided with in described aerobic zone, top is communicated with described double oxygen negative area, bottom is provided with internal recycle water inlet, described circulation oxygen case internal upper part of holding concurrently has vertically disposed diaphragm, and described plant basket bottom is fixed in this diaphragm upper end, and lower end extends to described double position, oxygen negative area and is in same level position with described aeration element; Described double oxygen negative area is around the region be located at beyond described aerobic zone, and described circulation oxygen lower box part of holding concurrently is provided with mud thrust-augmenting nozzle; Described master controller is also electrically connected with flow director, dissolved oxygen controller, temperature regulator and and sludge concentration controller.

Less energy-consumption provided by the invention, in smart three-dimensional ecological internal circulation nitrifying method, by absorbing sun power and utilizing natural wind-force, for whole operation of sewage disposal system provides the energy, make it not need external source, and aboundresources, both can freely use, again without the need to transport, to environment without any pollution, its multiple stereo ecological internal recycle de-nitrification unit arranged in settling tank are under continuous running status, the Gradient distribution of dissolved oxygen can be realized in oxygen case is held concurrently in circulation, and manage in unit throughout different zones is set, cultivate nitrobacteria and denitrifying bacterium, and by density difference and aeration power, sewage is circulated at regional, mud is made to realize endless backflow, thus reach and remove organic pollutant, the object of denitrogenation.Simultaneously, temperature in flow when being controlled the sewage disposal in pond by control device, the content of dissolved oxygen, pond and sludge concentration, treating pond arrange stereo ecological internal recycle nitrification installation under sequence batch (or succession running condition, nitrobacteria can be cultivated in aerobic zone, Denitrifying Phosphate Accumulating Organisms is cultivated in double oxygen negative area, and then complete the technological process of the less energy-consumption of sewage disposal, intelligentized control method anaerobic phosphorus release, aerobic nitrification and double oxygen denitrification phosphorus-collecting, the final object realizing removing organic pollutant, denitrogenation and dephosphorization.

Less energy-consumption proposed by the invention, smart three-dimensional ecological internal circulation nitrification installation are just on the basis of aforementioned various research work, comprehensive China different geographical, dissimilar Small Urban sewage discharge feature, overcome the shortcoming that prior art is not up to standard to discharge indexs such as deodorizing dephosphorization denitrogenation and total nitrogens, propose a kind of novel ecological sewage treatment technology, in Sewage Plant upgrading process, engineering land used, not newly-increased running cost can not be increased newly, reach efficient, energy-conservation, Low investment, low cost, convenient management and operation, applicable region target widely; Object is deodorizing total phosphorus, ammonia nitrogen and total nitrogen etc. can be risen to the discharge index being better than one-level A again.It is high that the organism being embodied in unit volume is removed load by its high efficiency, and denitrification ability is strong, and dephosphorizing capacity is strong; Its energy saving will be embodied in and only complete various water reflux course by oxygen supply power, the dynamic efficiency of conventional oxygen supply process is made not only to be embodied in oxygen transfer efficiency, and be embodied on promotion liquid return, biological denitrificaion target can be reached for by by automatic control system especially, make mud realize endless backflow; Its Low investment completes in a unit by being embodied in the process removing different pollutent (differential responses condition), facility compact, and floor space is little, and one-time investment is little, decreases many refluxing unit energy consumptions, reduces facility investment expense; Its low cost will be embodied in power consumption and reduce rear electricity charge minimizing, and equipment maintenance cost reduces, and manual operation expense reduces; Its intelligent advantage will be embodied in automatic detection and the feedback control of all multiparameters, make each reaction process all in corresponding region, corresponding top condition, metastable operation; The accessibility of its operational administrative will be embodied in treating processes itself and simplify, and automatic detection level is higher, and manually-operated error etc. can drop to minimum.

Accompanying drawing explanation

Fig. 1 is integral layout schematic diagram of the present invention;

Fig. 2 is apparatus of the present invention embodiment one front section view;

Fig. 3 is apparatus of the present invention vertical view;

Fig. 4 is apparatus of the present invention stereo ecological internal recycle de-nitrification unit embodiment one structure front section view;

Fig. 5 is the levitation device side installation side view of apparatus of the present invention stereo ecological internal recycle de-nitrification unit embodiment one;

Fig. 6 is the levitation device opposite side installation side view of apparatus of the present invention stereo ecological internal recycle de-nitrification unit embodiment one;

Fig. 7 is the vertical view of apparatus of the present invention stereo ecological internal recycle de-nitrification unit embodiment one;

Fig. 8 is plant basket structure vertical view in apparatus of the present invention stereo ecological internal recycle de-nitrification unit.

Fig. 9 is apparatus of the present invention stereo ecological internal recycle de-nitrification unit embodiment two structure front section view;

Figure 10 is that apparatus of the present invention are applied to urban sewage treatment process schema;

Figure 11 is that apparatus of the present invention are applied to technique for treating industrial wastewater schema;

Figure 12 is apparatus of the present invention and the comparing of traditional technology.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail.Should be appreciated that specific embodiment described herein, only for explaining the present invention, being not intended to limit the present invention.

The present invention provide firstly a kind of less energy-consumption for Sewage treatment systems upgrading, smart three-dimensional ecological internal circulation nitrifying method, that the contact-oxidation pool of sewage disposal is transformed into settling tank, and roof solar device is set above this settling tank, periphery arranges aerogenerator, to generate electricity to whole operation of sewage disposal system, at least one stereo ecological internal recycle processing unit is set in described settling tank pond, each stereo ecological internal recycle processing unit can be embarked on journey according to application place, in column or in array format, each described stereo ecological internal recycle processing unit is respectively arranged with ecological deodorizing district and circulation nitration reaction district from top to bottom, wherein circulation nitration reaction district is arranged at a circulation and holds concurrently in oxygen case, from-inner-to-outer is divided into aerobic zone and double oxygen negative area, aeration element is set in aerobic zone simultaneously, and flow when introducing the sewage disposal in controller control pond, the content of dissolved oxygen, temperature in pond and sludge concentration.When sewage introduces described aerobic zone by water inlet pipe 21, sewage is made to drive rising by aerobic zone (rising area) by the castering action of aeration element, when flowing through close to water surface 50-500mm, fluidized active sludge and liquid can flow to oxygen negative area (decline district) of holding concurrently by the water outlet opened wide through being arranged on top, aerobic zone, owing to containing bubble after aerobic zone (rising area) aeration, density ratio oxygen negative area (decline district) of holding concurrently is low, thus the density difference of rising area and last transition can be produced, liquid between 2nd district is made to flow to low density place from the place that density is high, make double oxygen negative area (decline district) interior active sludge and downward liquid flow, the internal recycle water inlet arranged from aerobic zone enters again aerobic zone (rising area), at this moment, the active sludge and the liquid that enter aerobic zone are risen by the effect of aeration element again, active sludge and the liquid water outlet opened wide again by top, aerobic zone in rising area is made to reenter the double oxygen negative area (decline district) of circulating and holding concurrently in oxygen case, start next circulation, complete sewerage ecological nitrifying process, by the supernatant liquor of the nitration reaction that repeatedly circulates, finally flowed out by the water outlet on described settling tank.Like this, by absorbing sun power and utilizing natural wind-force, for whole operation of sewage disposal system provides the energy, make it not need external source, and aboundresources, both can freely use, again without the need to transport, to environment without any pollution, simultaneously, the flow during sewage disposal in pond is controlled by control device, the content of dissolved oxygen, temperature in pond and sludge concentration, the foul smell that the sewage making to be arranged in aerobic zone and double oxygen negative area produces at continuous flow process is fully adsorbed by the filler in ecological deodorizing district and plant roots and stems and is decomposed, simultaneously on constantly, lower and in, in outer loop process in aerobic zone abundant oxygen supply and proper temperature, under nutritional condition, make to be invested in aerobic microorganism amount reproduction in this region, cultivate nitrobacteria, Denitrifying Phosphate Accumulating Organisms is cultivated in double oxygen negative area, and utilize it to be decomposed by oxidation operation in sewage, thus in the past, sewage is constantly made to enter its internal recycle, and then the less energy-consumption of sewage disposal can be completed, the anaerobic phosphorus release of intelligentized control method, the technological process of aerobic nitrification and double oxygen denitrification phosphorus-collecting.

In aforesaid method, the volumetric ratio of described aerobic zone and double oxygen negative area chooses 1-2.5:0.4-1; When domestic sewage processing system is applied, its new construction index is: project occupation of land area is 0.3-0.4m ²/ m ³, its operating parameter is: the aerobic zone reaction times is 4-6h; Mixed genetic-neural network (MLSS) controls at 2500-7000mg/L; Aerobic zone dissolved oxygen (DO) gets 2-5mg/L, and 0.3-1.0mg/L is got in oxygen negative area dissolved oxygen (DO) of holding concurrently, and pH value is 7-7.8.

See Fig. 1-Fig. 3, according to aforesaid method, present invention also offers the less energy-consumption of a kind of newly-built municipal wastewater treatment plant and municipal wastewater treatment plant treatment system upgrading, smart three-dimensional ecological internal circulation nitrification installation, it contact-oxidation pool comprised in the process of raw waste water treatment system is transformed into settling tank 2, and roof solar power generation assembly 50 is set above this settling tank 2, device of solar generating 50 comprises multiple sun power electroplax 501, this settling tank 2 periphery, aerogenerator 60 is also set, device of solar generating 50 and aerogenerator 60 are also connected a secondary battery 70 by circuit control device 80, the direct current that device of solar generating 50 and aerogenerator 60 can be made to produce converts the alternating-current meeting grid requirements to through circuit control device 80, and by secondary battery 70, when there being illumination by electrical power storage that sun power electroplax 501 sends, it's time to need to discharge again, device of solar generating 50, aerogenerator 60, circuit control device 80 and secondary battery 70, all controlled by master controller 90, at least one internal recycle processing unit 1 is provided with in this settling tank 2, in settling tank 2 shown in Fig. 3, Fig. 4, transverse row shows 4 internal recycle processing units 1, can realize settlement of sewage and the outflow of supernatant liquor horizontal direction at settling tank 2, settling tank 2 is provided with water outlet 22.See Fig. 2, Fig. 4, Fig. 9, each described processing unit 1 is respectively arranged with ecological deodorizing district A and circulation nitration reaction district from top to bottom, and wherein circulation nitration reaction district is arranged at a circulation and holds concurrently in oxygen case 104, the double oxygen case 104 transversely arranged layout in settling tank 2 of circulation.Described ecological deodorizing district A is positioned at above the double oxygen case 104 of circulation, cultivation has water to support plant 4, water is supported plant 4 and is supported stem and be positioned at ecological deodorizing district A, and the branches and leaves 41 on its top are revealed in settling tank 2 above sewage, and its lower root 42 is placed in described circulation and holds concurrently the inside of oxygen case 104; Described circulation nitration reaction divides into double oxygen negative area B (decline district) and aerobic zone C (rising area), wherein aerobic zone C is positioned at the double region, oxygen case 104 central zone of circulation, described circulation oxygen case 104 of holding concurrently is provided with the internal recycle water inlet 112 that can be communicated with sewage in settling tank 2, and bottom is provided with mud thrust-augmenting nozzle 105; In described aerobic zone C, be provided with internal recycle water inlet 112, be communicated with water inlet pipe 21, aerobic zone C is also provided with aeration element 108, this aeration element 108 is located at bottom the C of aerobic zone, be aeration element 108 oxygenation arranged in each aerobic zone C by the aeration tube 3 be arranged at bottom settling tank 2, aeration tube 3 connects gas blower 400, for aeration element 108 provides oxygen.In said apparatus, each internal recycle processing unit cultivates nitrobacteria and denitrifying bacterium in different zones, and by aeration power, fluidized active sludge in aerobic zone C (rising area) and liquid are driven at aerobic zone C and rises, when flowing through close to water surface 50-500mm, the water outlet that open wide of sewage disposal liquid 117 through C top, aerobic zone flows to around in the double oxygen negative area B (decline district) beyond the C periphery of aerobic zone, because aerobic zone C contains bubble, density ratio is held concurrently, and B is low in oxygen negative area, form the density difference in two intervals, therefore, sewage disposal liquid 117 just declines at this double oxygen negative area B froth breaking and muddy water mixed solution, when being down to double oxygen negative area B bottom section, due to the Involving velocity of aerobic zone C aeration element 108, and because aerobic zone C density ratio is held concurrently, B is low in oxygen negative area, sewage disposal liquid 117 is inhaled in the C of aerobic zone by internal recycle water inlet 112 again, again circulate.Like this, sewage disposal liquid 117 at regional constantly from inside to outside and circulate from top to bottom, makes muddy water mixed solution realize endless backflow, thus reaches and remove organic pollutant, the object of denitrogenation.The present invention is under continuous running status, the Gradient distribution of dissolved oxygen can be realized at the aerobic zone C circulated in double oxygen case 104 and double oxygen negative area B, the sewage of each unit after internal recycle nitration treatment precipitates in settling tank 2, supernatant liquor 106 finally by the nitration reaction that repeatedly circulates is flowed out by settling tank water outlet 22, the mud 109 precipitated in double oxygen negative area B is discharged by the mud thrust-augmenting nozzle 105 bottom the double oxygen case 104 of circulation, and imports to anoxic pond or sludge thickener (see Figure 10, Figure 11) by mud suction pump 300.In above-mentioned working cycle, sewage imports in settling tank 2 by intake pump 200 by water inlet pipe 21, and its flow is controlled by flow director 91; Aeration element 108 aeration rate is controlled by dissolved oxygen controller 92, to control the content of dissolved oxygen in sewage disposal liquid 117, in settling tank 2, the temperature of sewage disposal liquid 117 is controlled by temperature regulator 93, mud 109 concentration of discharging that precipitates is controlled by consistency controller 94, forms whole system intelligentized control method process.

It should be noted that, after above-mentioned circulation, supernatant liquor 106 also can, under the control of master controller 90, by recycle pump 100, be reintroduced back in settling tank 2, again carry out short distance nitration, denitrification process, thoroughly to ensure the up to standard of the indexs such as deodorizing dephosphorization denitrogenation and total nitrogen.

Below in conjunction with accompanying drawing, apparatus of the present invention neutral body ecological internal circulation de-nitrification unit 1 concrete structure is further described.

Embodiment one:

See Fig. 4, as contrive equipment stereo ecological internal recycle de-nitrification unit embodiment one structure, described circulation hold concurrently oxygen case 104 suspend be arranged in settling tank 2, top is provided with rectangle plant basket 116, and described water is supported plant 4 kinds and planted in this plant basket 116.Specifically see Fig. 5-Fig. 8, plant basket 116 is fixed by plant basket support 115, two ends are provided with plant basket handle 1161, and plant basket support 115 4 angles are respectively equipped with unit connection draw-in groove 101, by web member, each interior processing unit is connected in one in contact-oxidation pool 2, plant basket support 115 is fixed on a suspension device 114, this suspension device 114 arranges the element that can suspend in water in plant basket support 115 bottom, by pressing plate 1141 and fastening piece 1142, make it lock ring in the periphery of double oxygen case 104 upper end of circulation, both can be used for holding plant basket support 115, plant basket 116 and the water of planting in this plant basket 116 are supported plant 4 and are suspended on settling tank 2 water surface, whole circulation oxygen case 104 of holding concurrently can be made again to be suspended in settling tank 2 water.

Particularly, described water supports plant 4 can select the emergent that rhizome is flourishing, have dephosphorization and denitrification effect.Plant Net Photosynthetic Rate and dissolved oxygen distribute, total nitrogen and the remarkable positive correlation of ammonia nitrogen removal frank, and plant transpiration rates and ammonia nitrogen removal frank significant correlation.Suitable increase plant growing density is conducive to improving the denitrification effect in sewage treatment process, but plant overstocked to raising dissolved oxygen levels and nitrogen removal rate unfavorable on the contrary.Plant growing cycle and denitrogenation affect significantly, and employing is not gathered in plant and terrestrial stem can be made neither to destroy roots of plants district microenvironment.The effect of type to denitrogenation dephosphorizing of plant also has a great impact.Research finds, in the stereo ecological device matrix of plantation raupo and Rush, nitrogen, phosphorus are respectively than without in the contrast matrix of plant low 18% ~ 28% and 20% ~ 31%, and visible raupo and Rush to have absorbed in sewage nitrogen partly and phosphorus.By the decontamination effect improving of control experiment apparatus of the present invention to sewage nitrogen, found that Rhizome of Grass leaf Sweelflag, Rush and Herba Iridis japonicae 3 have the total nitrogen average removal rate of botanical system to be 77.7%, 71.2% and 66.4%, and be only 55.8% without the clearance of botanical system.To the decontamination effect improving of sewage phosphorus, found that 3 have the clearance of botanical system to be respectively 61%, 65% and 59%, and be only 28% without the clearance of botanical system.By have studied the ability of 8 kinds of aquatic plant purification sewage, found that: the good and bad order of effect that the waterplant in summer that temperature is high removes nitrogen is: water hyacinth, water lettuce, frogbit, duckweed, Chinese scholartree leaf duckweed, duckweed, water sieve; Frogbit, Herba Eichhorniae, duckweed, water lettuce, duckweed, Chinese scholartree leaf duckweed, water sieve is then followed successively by the winter that temperature is low.

The emergent planted in apparatus of the present invention have be adapted at aerobic or few oxygen condition under the Structure and characteristics of surviving, comprise stem hypertrophy, the center of stem and root has larger tissue, stem hollow, the dark root system of tool etc.This special construction of plant, be conducive to the transmission of oxygen in its body and root district can be delivered to, not only meet the respiration of plant in anaerobic environment, but also can promote the redox reaction in root district and the activity of aerobic microbiological, release uncontaminated air removes peculiar smell.The oxygen produced under photosynthesis is delivered to root district, the microenvironment of oxidation is formed in the medium of the reduction-state in root district, aerobic, the double oxygen jointly existing for root district and the anaerobion of aerobic region, root district and anoxic zones provide respective microhabitat, make different microorganisms can play respective effect.Oxygen depends primarily on the perviousness of the concentration of inside plants oxygen, the oxygen requirement of surrounding substrate and plant endwall in the release of plant root.It is determined by the structure of itself that plant discharges oxygen by absorbing at root, and the structure of plant prevents it in the leakage of radial direction, and makes great efforts to make the loss of the oxygen being discharged into root district reduce to minimum.The release rate of oxygen is generally the highest at the sub-apex zone of root, and reduces with the increase of the distance tip of a root.Waterplant has convection ventilating tissue, its root district and root all have the concentration of higher inside oxygen, the flowing of the gas of this convection significantly increases can the length of oxygen supply root, simultaneously can also by oxidation and some potential objectionable impuritiess of detoxification minimizing root.Except root system can discharge except oxygen, root system can also discharge other material.So more than 100 kind of emergents such as described emergent is preferably Arundo donax, Alocasia ordora, fragrant Alocasia ordora, common calla, Canna generalis Bailey, Monstera deliciosa, He Wanglan, schefflera, nasturtium, Rhizome of Common Aspidistra, the thorn that comes into leaves certain herbaceous plants with big flowers, climbing fig, jade hairpin, marsh nutgrass flatsedge, Rhizoma Acori Calamis, above-mentioned plant harvesting and arrangement are very easy to.

Understandably, above-mentioned water support plant 4 can also be water support flowers or vegetables.The apparatus of the present invention being located at community can cultivate flowers, the foul smell both during Absorbable rod sewage disposal in ecological deodorizing district A, provide pure and fresh flower fragrance to community, and Hai Kedui community is beautified simultaneously, is kill two birds with one stone.Cultivate vegetables at ecological deodorizing district A, the apparatus of the present invention being arranged at Sewage treatment systems can be become the plantation base of vegetables, can multiple effect be reached equally.

In described plant basket 116, be provided with and can be used for supporting water and support the rhizome of plant 4 and adsorbable, degrading microorganism, absorption foul smell deodorant filler 102.Further, support described water and support the deodorant filler 102 of plant 4 rhizome for gac, haydite or photocatalyst new composite carbon material.Certainly, also can be other fillers.Preferred light catalyst new composite carbon material of the present invention.Described photocatalyst new composite carbon material has red-brown, white and black three kinds, is to be fired by compounds such as charcoal, potter's clay, photocatalyst agent and high temperature cakingagents to form.Can realistic as required existing how little size, microporosity and water-intake rate be adjusts in production, the aperture of finished product is between 0.06-6 micron, and weight-adjustable is to 0.6-2.7g/cm ³between, specific surface area can reach 1.2 × 104cm ²about/g.In building-up process, make its hole wall glassy phase and crystal interweave grow into the triplen of high-strength mechanical performance, the very flourishing and distribution gradient of internal capillary, has the ability of good adsorption and desorption.Compared with traditional gac, photocatalyst new composite carbon material substantially increases adsorption fouling particulate matter kind, improve adsorption efficiency and saturated capacity, its adsorption efficiency is 2-4 times of normal activated carbon, and overcomes the shortcoming using gac can produce powder and black pollution.In environmental applications, because of its there is strong adsorptive power and resistance to erosion, resistance to wear, the characteristic such as high temperature resistant, corrosion-resistant can replace gac and haydite to be used as the high-rate fitration material of air and Water warfare; Because of its have ultralight body weight suspension and resistance to erosion, resistance to wear, the characteristic such as high temperature resistant, corrosion-resistant can replace conventional filler.During high speed filtrate as industrial waste gas purifying, because the specific surface area of photocatalyst new composite carbon material reaches 1.2 × 104cm ²about/g, and internal run-through micropore distribution gradient, material is ultralight, physics and chemistry stable in properties, acid-fast alkali-proof superior performance, and due to intergranular Van der Waals force, Coulomb's force and surface tension make suspended substance or waste gas migration and adsorbed, adsorptive power is extremely strong, speed is exceedingly fast, and by the photocatalyst technology of proprietary ultraviolet source, can realize the function that absorption limit, limit is decomposed.

The water be arranged in double oxygen negative area B in the plant indigo plant 116 on the blue support 115 of plant is supported plant 4 and is suspended in the double oxygen negative area B water surface, the whole suspension growth of the ecological filler of its powerful rhizome System forming is in sewage, utilize the root system that waterplant is huge, adsorb with the foul smell produced when microorganism and system process in deodorant filler 102 pairs of waste water of the support rhizome be arranged in plant indigo plant 116 and deodorizing, degraded, on the other hand when foul smell upwards overflows, an adsorbable foul smell is formed by the branches and leaves that waterplant is luxuriant, prevent foul smell to the sealing coat of external diffusion, thus realize the denitrogenation dephosphorizing deodorizing process of waste water.

In apparatus of the present invention embodiment, also the deodorant filler 102 supporting rhizome can be placed in plant indigo plant 116 as carrier---be similar to the soil of plant, making water support plant 4 root system 42 is fixed in sewage, in reaction process, foul smell contacts with the microorganism in the deodorant filler 102 supporting rhizome simultaneously, further absorption decompose odor, and by its powerful rhizome system, waste water is purified.

Please again see Fig. 4, in stereo ecological internal recycle de-nitrification unit 1 embodiment one of the present invention, described circulation is held concurrently in oxygen case 104 and is provided with biologic packing material 110, fixed by filler anchor 113 and oxygen case 104 central zone of holding concurrently in circulation, filler anchor 113 is connected with plant blue 116, and be suspended in double Yang Xiang 104 center of circulation, form described aerobic zone C.Biologic packing material 110 in the C of aerobic zone hollow tubular is in the form of a ring arranged, as aerobe carrier, being suspended in circulation and holding concurrently in oxygen case 104, filler growth inside anerobe, and producing denitrification can denitrogenation; External growth aerobic bacteria, can organics removal, there is nitrification and denitrification process in whole treating processes simultaneously.Described circulation is held concurrently oxygen case 104 top, and is positioned at the region beyond the C upper opening of aerobic zone, and have multiple vertically disposed diaphragm 111, each diaphragm 111 top is fixed on the bottom of plant basket support 115, and lower end extends to double oxygen negative area B.In each diaphragm 111, the longest dividing plate and aeration element 108 are in same level position, also can be used as the installation component of filler anchor 113.Double oxygen case 104 bottom of circulation is contraction-like, and be convenient to mud 109 fall, and be provided with mud thrust-augmenting nozzle 105 bottom it, the mud 109 that precipitation falls can be discharged to anoxic pond or sludge thickener (see Figure 10, Figure 11) from this pipe.

Apparatus of the present invention embodiment one structure, in the settling tank 2 in Sewage treatment systems, multiple stereo ecological internal recycle de-nitrification unit 1 is suspended in pond, increase air lift based on the settling tank 2 in the process of raw waste water treatment system and rise stereo ecological internal recycle nitration treatment unit, plant purification organism is the process structure of auxiliary a kind of ecosystem low cost.In settling tank 2, because the water displacement that suspension device 114 can carry reaches 900 kilograms, therefore can be that hold concurrently oxygen case 104, plant basket 116, deodorant filler 102 and water of the circulation of 600 kilograms is supported plant 4 and is suspended in settling tank 2 by total amount.Simultaneously, be arranged at aeration tube aeration in the aeration element 108 in the C of aerobic zone, fluidized sewage disposal liquid 117 in settling tank 2 is driven at aerobic zone C and vertically rises, when flowing through close to water surface 50-500mm, because the stop running into ecological deodorizing district A flows to by the outward opening transverse flow on C top, aerobic zone, enter holding concurrently in oxygen negative area B (decline district) in the double oxygen case 104 of circulation.In order to further specification flows to, same level position can be in aeration element 108 when vertically disposed diaphragm 111 lower end extends to double oxygen negative area B in the double oxygen case 104 of circulation, constraint fluidized activated sewage treatment solution 117 is forced to enter double oxygen negative area B (decline district) by diaphragm 111, because aerobic zone C (rising area) is containing bubble, the density ratio oxygen negative area B (decline district) that holds concurrently is low, create the density difference of rising area and last transition, liquid between 2nd district is made to produce circulation, bottom aerobic zone C simultaneously after aeration, owing to there is the Involving velocity of aeration, the internal recycle water inlet 112 of sewage disposal liquid 117 just again by arranging bottom the C of aerobic zone of the double oxygen negative area B that water conservancy diversion declines sucks, enter aerobic zone C again, double oxygen negative area B is outwards again entered by the oral area of its opened upper end after rising, therefore the nitrifying process that circulates from inside to outside is formed, double oxygen negative area B supernatant liquor 106 finally by the nitration reaction that repeatedly circulates can flow to settling tank 2 from the water outlet being positioned at diaphragm 111 outside, supernatant liquor after settling tank 2 precipitates is flowed out by settling tank water outlet 22.The mud 109 that the oxygen negative area B that holds concurrently falls is discharged by the mud thrust-augmenting nozzle 105 of double oxygen case 104 lower end of circulation.The present embodiment is adapted to Sewage treatment systems and does not stop transformation.

Embodiment two:

See Fig. 9, the present embodiment is substantially identical with embodiment one, and difference is, described circulation oxygen case 104 of holding concurrently is fixedly installed in contact-oxidation pool 2, and top is provided with rectangle plant basket 116, and described water is supported plant 4 kinds and planted in this plant basket 116.With embodiment one, plant basket 116 is fixed by plant basket support 115, two ends are provided with plant basket handle 1161, and plant basket support 115 4 angles are respectively equipped with unit connection draw-in groove 101, by web member, each interior processing unit 1 is connected in one in settling tank pond 2, plant basket support 115 is connected and fixed by the double oxygen case 104 of back up pad 103 and circulation, and double 104, the oxygen case of circulation is fixed in settling tank 2 by support foot rest 107.With embodiment one, the present embodiment is in the settling tank 2 in Sewage treatment systems, multiple stereo ecological internal recycle de-nitrification unit 1 is fixed in pond, increase air lift based on the settling tank 2 in the process of raw waste water treatment system and rise stereo ecological internal recycle nitration treatment unit, plant purification organism is the process structure of auxiliary a kind of ecosystem low cost.In settling tank 2, be arranged at aeration element 108 aeration in the C of aerobic zone, fluidized sewage disposal liquid 117 in settling tank 2 is driven at aerobic zone C and rises, when flowing through close to water surface 50mm, because the stop running into ecological deodorizing district A flows to by the outward opening transverse flow on C top, aerobic zone, enter holding concurrently in oxygen negative area B (decline district) in the double oxygen case 104 of circulation.Same level position can be in aeration element 108 when vertically disposed diaphragm 111 lower end extends to double oxygen negative area B in the double oxygen case 104 of circulation, constraint fluidized activated sewage treatment solution 117 is forced to enter double oxygen negative area B (decline district) by diaphragm 111, because aerobic zone C (rising area) is containing bubble, the density ratio oxygen negative area B (decline district) that holds concurrently is low, create the density difference of rising area and last transition, therefore, circulation is produced containing alveolate sewage its muddy water mixed solution liquid between 2nd district after the froth breaking of double oxygen negative area, bottom aerobic zone C simultaneously after aeration, owing to there is the Involving velocity of aeration, the internal recycle water inlet 112 of sewage disposal liquid 117 just again by arranging bottom the C of aerobic zone of the double oxygen negative area B that water conservancy diversion declines sucks, enter aerobic zone C again, double oxygen negative area B is outwards again entered by the oral area of its opened upper end after rising, therefore the nitrifying process that circulates from inside to outside is formed, double oxygen negative area B supernatant liquor 106 finally by the nitration reaction that repeatedly circulates can flow to settling tank 2 from the water outlet of diaphragm 111 outside, flowed out by settling tank water outlet 22 through settling tank 2 supernatants after precipitation.The mud 109 that the oxygen negative area B that holds concurrently falls is discharged to anoxic pond or sludge thickener (see Figure 10, Figure 11) by the mud thrust-augmenting nozzle 105 of double oxygen case 104 lower end of circulation.The present embodiment be adapted to Sewage treatment systems newly-built or stop transformation.

Apparatus of the present invention are applicable to urban sewage treatment system upgrading, adopt foundation and the design of kinetic model and parameter in practical engineering application:

In stereo ecological internal recycle de-nitrification unit 1, the biochemical kinetic model of double oxygen negative area B and the foundation of parameter can according to the operation of lab scale process and operating method, determine the parameters such as the speed of reaction in the biochemical kinetics of periodical operation and operate continuously, reaction times and reactor effective volume, for practical engineering application from now on provides reference frame.

1. the general requirement of the present invention's application

(1) the inventive method should be used for small town sewage and Industrial Wastewater Treatment engineering, and its single cover sewage load should be less than 150m ³/ d, when the process water yield is greater than 150m ³during/d, the mode of many cover stereo ecological circulation nitrification installation cooperations should be adopted.

(2) water inlet of apparatus of the present invention should meet following condition:

1) water temperature is preferably 10 DEG C ~ 37 DEG C, pH is preferably 6.0 ~ 9.0, BOD ₅/ COD _crvalue should be greater than 0.3, nutrient combination ratio (BOD ₅: nitrogen: phosphorus) be preferably 100:5:1, influent COD cr concentration should lower than 1000mg/L;

2), when having removal ammonia nitrogen requirement, water inlet total alkalinity is (with CaCO ₃meter)/ammonia nitrogen value is suitable>=and 7.14, should basicity be supplemented when not meeting;

3), when removing total nitrogen requirement, denitrification requires the carbon source BOD of water inlet ₅/ total values of nitrogen might is suitable>=and 4.0, total alkalinity is (with CaCO ₃meter)/ammonia nitrogen value is suitable>=and 3.6, answer supplementary carbon source or basicity when not meeting;

4) when having dephosphorization requirement, the five-day BOD (BOD in sewage ₅the ratio of)/total phosphorus should be greater than 17:1;

5), when requiring simultaneously dephosphorization, denitrogenation, 3 should be met simultaneously) and 4) requirement.

(3), when the inventive method water outlet is directly discharged, country or local emission standard requirement should be met; When entering next stage processing unit, the inflow requirement of next stage processing unit should be met.

(4) according to denitrogenation dephosphorizing requirement, should in stereo ecological circulates nitration processes preposition anoxic pond.

(5) when influent quality does not meet (2) defined terms, suitable pre-treatment and pretreatment technology should be taked according to influent quality.

(6) soda acid medicament, carbon source medicament and Dephosphorization reagent hold-up vessel capacity should design by the dosage of the 4d ~ 7d of theoretical chemical feeding quantity, and medicine system should not be less than 2, and volume pump should be adopted to add.

2., when applying apparatus of the present invention, municipal sewage treatment should adopt flow process shown in Fig. 9, flow process shown in the appropriate to the occasion employing Figure 10 of Industrial Wastewater Treatment.

3. pre-treatment and pre-treatment (see Figure 10, Figure 11)

1) before water inlet system, should grid be set.Inlet pumping station and grill designs should meet the relevant regulations of GB 50014.

2) fluidized-bed process should arrange settling pit after grid, and the design of settling pit should meet the relevant regulations of GB 50014.

3) when suspended substance (SS) of intaking is higher than 200mg/L, should arrange preliminary sedimentation tank before circulation nitrification installation, the design of preliminary sedimentation tank should meet the relevant regulations of GB 50014.

4) when more than the daily variation maximum value of water quality or the water yield is the twice of minimum value or twice, should equalizing tank be set.The design of equalizing tank should meet following requirement:

A) equalizing tank capacity should be determined according to wastewater flow change curve; When not having flow changing curve, the residence time of equalizing tank is preferably 6h ~ 12h;

B) in equalizing tank, should whipping appts be set, stirrer or aeration agitation mode should be adopted;

C) equalizing tank water side should arrange the device that scums, and should arrange desanding and mud discharging device at the bottom of pond.

5) pH regulator should meet the following requirements:

A) as inlet flow-patterm <6.0 or pH>9.0, appropriate soda acid medicament should be supplemented in time;

B) medicament kind, dosage and toss area should be determined by test in place;

C) soda acid medicament can adopt dilute hydrochloric acid, dilute sulphuric acid, lime or sodium carbonate etc.;

D) e-quipment and pipe of contact acid caustic corrosion material should take anticorrosive measure.

6) carbon source regulates and should meet the following requirements:

A) as water-inlet carbon source BOD ₅during/total values of nitrogen might <4.0, proper amount of carbon source should be supplemented in time;

B) medicament kind, dosage and toss area should be determined by test in place;

C) carbon source medicament can adopt the high concentrated organic wastewater of the discharges such as methyl alcohol, acetic acid or food brewery;

D), when storage and use methyl alcohol are as carbon source, corresponding gas defence protection should be done;

E) e-quipment and pipe contacting acetic acid corrosives should take anticorrosive measure;

F) carbon source dosage should be calculated as follows:

BOD ₅＝2.86×(N ₁-N ₀)×Q…………………………(1)

In formula:

BOD ₅---the BOD that the carbon source added is corresponding ₅amount, mg/L;

N ₁---in ammonia nitrogen situation up to standard, during non-supplementary carbon source, the total nitrogen concentration of process water outlet, mg/L;

N ₀---the water outlet total nitrogen concentration of standard-required, mg/L;

Q---sewage design discharge, m ³/ d.

4. the design variable of apparatus of the present invention

(1) aerobic reactor zone volume is determined

1), when determining aerobic reactor zone volume according to the volumetric loading of circulation nitrification installation, should be calculated as follows:

V ₁＝Q(S _o-S _e)/N _v…………………………(2)

In formula:

V ₁---circulation nitrification installation aerobic reactor zone volume, m ³;

Q---sewage design discharge, m ³/ d;

S _o---circulation nitrification installation water inlet chemical oxygen demand (COD), mg/L;

S _e---circulation nitrification installation water outlet chemical oxygen demand (COD), mg/L;

N _v---volumetric loading, kgCOD/ (m ³d).

2) volumetric loading (N _v) should determine according to test or the design variable of similar sewage, as during without other data, can with reference to following rule of thumb data:

A) as waste water BOD ₅during/CODcr>0.4, N _vdesirable 3kgCOD/ (m ³d) ~ 5kgCOD/ (m ³d);

B) as 0.3<BOD in waste water ₅during/CODcr<0.4, N _vdesirable 1kgCOD/ (m ³d) ~ 3kgCOD/ (m ³d);

C) as BOD in waste water ₅during/CODcr<0.3, BOD should be improved by pre-treatment and pre-treatment ₅the value of/CODcr makes it be greater than 0.3.

3), when determining aerobic reactor zone volume according to hydraulic detention time θ, should be calculated as follows:

V ₁＝Q·θ……………………………………………(3)

In formula:

V ₁---circulation nitrification installation aerobic reactor zone volume, m ³;

Q---sewage design discharge, m ³/ d;

θ---hydraulic detention time, h.

4) for sanitary sewage, the desirable 4h ~ 6h of θ in formula (3), for the desirable 5h ~ 8h of trade effluent or determine depending on its biodegradability.Obtain V ₁after should check by formula (2).

(2) oxygen negative area volume of holding concurrently is determined

1) volumetric ratio of aerobic reactor zone and double oxygen negative area is designed to (1 ~ 2.5): 0.4 ~ 1.

2) hypoxia response district volume should be calculated as follows:

$V_2=\frac{V_1{D}_2^2}{D_1^2-D_2^2}...\left(4\right)$

In formula:

V ₂---hypoxia response district volume, m ³; V ₁---circulation nitrification installation aerobic reactor zone volume, m ³;

D ₁---circulation nitrification installation area, m ²; D ₂---hypoxia response district area, m ².

(3) determination of the oxygen-supplying amount of stereo ecological circulation nitrification installation

1) stereo ecological circulation nitrification installation adopts blast aeration oxygen supply, and aerator should be located at just to bottom the circulation nitrification installation in up-flow district, should adopt uniform middle micro porous aeration head or perforated pipe aerating regulation.Sewage oxygen requirement should be calculated as follows:

$\begin{array}{c}{O}_2=0.001\mathrm{aQ}(S_o-S_e)-\mathrm{c\&Delta;}{X}_{\mathrm{vss}}+b[0.001Q(N_k-N_{\mathrm{ke}})-0.12\mathrm{\&Delta;}{X}_{\mathrm{vss}}]\\ -0.62b[0.001Q(N_t-N_{\mathrm{te}}-N_{\mathrm{oe}})-0.12\mathrm{\&Delta;}{X}_{\mathrm{vss}}]...\left(5\right)\end{array}$

In formula:

O ₂---sewage oxygen requirement, kgO ₂/ d; Q---sewage design discharge, m ³/ d;

S _o---water inlet five-day BOD, mg/L; S _e---water outlet five-day BOD, mg/L;

X _vss---discharge the microbial biomass of system, kg/d; N _k---water inlet total Kjeldahl nitrogen concentration, mg/L;

N _ke---water outlet total Kjeldahl nitrogen concentration, mg/L; N _t---water inlet total nitrogen concentration, mg/L;

N _te---water outlet total nitrogen concentration, mg/L; N _oe---effluent nitrate-nitrogen concentration, mg/L;

The oxygen equivalent of a---carbon, when carbonaceous material is with five-day BOD timing, gets 1.47;

B---oxygen amount (kgO needed for oxidation per kilogram ammonia nitrogen ₂/ kgN), get 4.57;

The oxygen equivalent of c---bacterial cell, gets 1.42.

2), when removing carbon based pollutants, circulation nitrification installation sewage oxygen requirement should get 0.7kgO ₂/ kg BOD ₅~ 1.2kgO ₂/ kgBOD ₅.

3) when stereo ecological circulation nitration processes selects blast aerator and equipment, should according to different blast apparatuses, aerating apparatus, be arranged in the undersurface degree of depth, water temperature, in factors such as dirty water oxygen overall transfer characteristic, local sea level elevation and expection biological fluidized bed dissolved oxygen concentrations, the sewage oxygen requirement of calculating be scaled sewage oxygen requirement under standard state.

4) under standard state (0.1MPa, 20 DEG C), sewage oxygen requirement should be calculated as follows:

O _s＝K _o·O ₂……………………(6)

$K_o=\frac{C_{s\left(20\right)}}{\mathrm{\&alpha;}(\mathrm{\&beta;}\&CenterDot;\mathrm{\&rho;}\&CenterDot;C_{\mathrm{sb}\left(T\right)}-C_o)\&times;1.024^{(T-20)}\&times;F}...\left(7\right)$

$C_{\mathrm{sb}\left(T\right)}=C_{s\left(T\right)}(\frac{P_b}{2.026\&times;{10}^5}+\frac{O_t}{42})...\left(8\right)$

P _b＝P+9.8×10 ³H…………………………(9)

$\mathrm{\&rho;}=\frac{P_1}{1.013\&times;{10}^5}...\left(10\right)$

$O_t=\frac{21(1-E_A)}{79+21(1-E_A)}\&times;100\%...\left(11\right)$

In formula:

O _s---sewage oxygen requirement under standard state, kgO ₂/ d;

K _o---oxygen requirement correction factor;

O ₂---sewage oxygen requirement, kgO ₂/ d;

C _{s (20)}---saturated dissolved oxygen concentration in clear water under standard conditions, get 9.2mg/L;

C _{sb (T)}---T DEG C, under atmospheric pressure, the mean value of mixed solution saturated dissolved oxygen concentration in circulation nitrification installation, mg/L;

C _{s (T)}---T DEG C, under atmospheric pressure, clear water surface saturated dissolved oxygen concentration value, mg/L;

C _o---mixed solution residue dissolved oxygen, generally get 2mg/L;

α---total oxygen transfer coefficient and the ratio of total oxygen transfer coefficient in clear water in mixed solution, generally gets 0.8 ~ 0.85;

The saturation values of dissolved oxygen of β---mixed solution and the ratio of the saturation values of dissolved oxygen in clear water, generally get 0.9 ~ 0.97;

F---aeration diffusion facilities damage factor, generally gets 0.65 ~ 0.9;

ρ---pressure correcting coefficient;

P ₁---location true pressure, Pa;

T---design water temperature, DEG C;

P _b---the absolute pressure in air-diffuser exit, Pa;

The fitting depth of H---air-diffuser, m;

P---barometric point, P=1.013 × 105Pa;

E _a---the coefficient of oxygen utilization of air-diffuser, is generally provided by manufacturer;

O _t---the volume percent of oxygen in apparatus of the present invention water surface evolving gas after aeration.

5) under standard state, blast aeration air demand is calculated as follows:

$E_A=\frac{O_s}{S}\&times;100\%...\left(12\right)$

S＝G _s×0.21×1.331＝0.28G _s………(13)

$G_s=\frac{O_s}{0.28}{E}_A...\left(14\right)$

In formula:

E _a---the coefficient of oxygen utilization of air-diffuser, is generally provided by manufacturer;

O _s---sewage oxygen requirement under standard state, kgO ₂/ d;

S---oxygen-supplying amount, kgO ₂/ h;

0.21---oxygen is percentage in atmosphere;

1.331---when 20 DEG C, the density of oxygen, kg/m ³;

G _s---the air demand under standard state, m ³/ h.

6) apparatus of the present invention should arrange a set of blast aeration equipment for subsequent use.

7) should select the gas blower of lower noise, air blast machine room should take sound insulation and noise reduction measure, and meets the regulation of GB 12523.

8) single-stage high-speed aeration centrifugal blower should meet the regulation of HJ/T 278; Root's blower should meet the regulation of HJ/T 251; Micro-hole aerator should meet the regulation of HJ/T 252.

5. the speed of reaction in apparatus of the present invention biochemical kinetics of intermittent water inflow

In apparatus of the present invention of lab scale, the active sludge of holding concurrently in oxygen negative area is batch culture.The bacterium of batch culture can not continuously breed.When bacterial equilibrium grows, its chemical constitution is constant.This simplify the mensuration work of bacterial cultures proliferation rate, because the rate of increase measuring any one composition in bacterial cultures is just enough to the proliferation rate representing bacterium.

Therefore, the proliferation rate of the bacterial cultures of balanced growth can represent with following formula:

$\frac{\mathrm{dx}}{\mathrm{dt}}=\mathrm{\&mu;x}...\left(15\right)$

In formula, μ---proliferation rate constant, or claim than proliferation rate, h ^-1;

X---bacterial concentration, mg/L.

T---the reaction times, h.

The solids concn MLSS of employing mixed solution replaces the bacterial concentration x alive in above formula, and represents with capitalization X, and unit is mg/L.That is:

$\frac{\mathrm{dX}}{\mathrm{dt}}=\mathrm{\&mu;X}...\left(16\right)$

In addition, the proliferation rate formula of bacterium meets Monod equation:

$\mathrm{\&mu;}=\frac{{\mathrm{\&mu;}}_{\max }C}{K_s+C}...\left(17\right)$

In formula, μ _max---maximum proliferation rate constant, or claim high specific proliferation rate, h ^-1

K _s---saturation constant, time concentration C value;

C---organic concentration, mg/L.

Can draw from formula (17), when nutrient concentrations is very low, μ value reduces, and thus the growth velocity of bacterium declines thereupon.With the increase of nutrient concentrations, μ value increases, and growth velocity also just rises, and obtains larger biomass.But the growth velocity of bacterium also slows down.Pilot run shows, when temperature is about 30 DEG C, the minimum total organic matter concentration of oxygen negative area of holding concurrently in apparatus of the present invention, i.e. nutrient concentrations is about 150mg/L.At exponential growth, the multiplication rate dX/dt of bacterium and limit between nutraceutical minimizing speed dC/dt and there is following proportional relationship:

$\frac{\mathrm{dX}}{\mathrm{dt}}=-Y\frac{\mathrm{dC}}{\mathrm{dt}}...\left(18\right)$

In formula, Y is performance factor (yield factor), and its connotation is shown out in following formula:

As seen from the above equation, Y represents the bacteriological quality that every gram of nutrition produces.

Formula (17) is substituted into formula (18), can obtain:

$r_C=-\frac{\mathrm{dC}}{\mathrm{dt}}=\frac{1}{Y}\frac{\mathrm{dX}}{\mathrm{dt}}=\frac{1}{Y}\frac{{\mathrm{\&mu;}}_{\max }C}{K_S+C}X...\left(19\right)$

In formula, r _cspeed of reaction in one biochemical kinetics, mg/ (Lh).

When substrate concn is very little:

$r_C=\frac{1}{Y}\frac{{\mathrm{\&mu;}}_{\max }}{K_S}\mathrm{CX}...\left(20\right)$

If constant (unit is L/ (mgh)), then can obtain the biochemical reaction rate r held concurrently in oxygen negative area in the apparatus of the present invention under low concentration sewage condition _cexpression formula:

$r_C=-\frac{\mathrm{dC}}{\mathrm{dt}}=\mathrm{kCX}...\left(21\right)$

(2) determination in reaction times

When material balance is done to apparatus of the present invention, two principal character should be grasped: one is reacting the input and output carried out without material in process; Two is the effects due to airflow stirring, and in aerobic zone, material fully mixes, and concentration is homogeneous, and the concentration of reaction system only changes with the reaction times.Therefore material balance can be done to whole device.

To biochemical reaction, the optional substrate of the component accounted and product, also can account by bacterium.As done material balance to response matrix and product, its basic relational expression is:

[component enters the amount of this volume element]=[component flows out the amount of this volume element]+[amount that in volume element, component transforms]+[in volume element component semi-invariant]

According to above formula, to the stereo ecological circulation nitrification installation of periodical operation, its material balance formula should be:

The cumulative speed of reactive component conversion rate=reactive component

Namely

$V_R{r}_C=-\frac{d{N}_C}{\mathrm{dt}}...\left(22\right)$

Can be obtained fom the above equation:

$r_C=-\frac{1}{V_R}\frac{d{N}_C}{\mathrm{dt}}...\left(23\right)$

In formula, V _r---reactor effective volume, L;

N _c---the amount of matrix, mg.

To liquid phase reaction:

$r_C=-\frac{\mathrm{dC}}{\mathrm{dt}}...\left(24\right)$

If make t=O, C=Co; T=t, C=Ct, by formula (24) variables separation integration, obtain:

$t=-{\&Integral;}_{C_0}^{C_1}\frac{\mathrm{dC}}{r_C}...\left(25\right)$

Formula (21) is substituted into formula (25), the expression formula of the reaction times t of the stereo ecological circulation nitrification installation under low concentration sewage condition can be obtained:

$t=-{\&Integral;}_{C_0}^{C_1}\frac{\mathrm{dC}}{r_C}=-\frac{1}{\mathrm{kX}}\ln \frac{C_1}{C_0}...\left(26\right)$

By the reaction times T=24 of the mounted cast of lab scale, the k value of reactor for treatment sanitary sewage under differing temps can be tried to achieve respectively: when temperature is 11 DEG C, K=5.3 × 10 ^-5l/mgh, when temperature is 30 DEG C, K=1.3 × 10 ^-4l/mgh.

Above-mentioned data show: under the condition that water inlet substrate concn is low, the kinetic rate of temperature to the double oxygen biology in lab scale reaction unit model has considerable influence.Temperature is higher, and biochemical reaction rate is faster.

(3) apparatus of the present invention effective volume

To apparatus of the present invention of periodical operation, reactant will reach certain level of response, or bacterium will reach the reaction times required for finite concentration, only relevant with the speed of process, and has nothing to do with device size.To apparatus of the present invention of periodical operation, its effective volume size is determined by the treatment capacity of reaction mass.If the time in periodical operation apparatus of the present invention operational cycle is T, then have:

T＝t+t _b………………………………(27)

In formula, t---reaction times, h;

T _b---overhead time, h.

Production task according to the rules, the volume of material requiring this device should process within the unit time is V _o, unit is L/h, then the effective volume of this device is:

V _R＝V ₀(t+t _b)………………………………(28)

In formula, V _r---device effective volume, L.

Therefore, t overhead time should be considered _bsize, and then the effective volume of more reasonably determining device.

6. apparatus of the present invention speed of reaction of operate continuously

(1) hydraulic detention time of device

Matrix (organism) is done and accounts, then have: input+circulation=consume+export

That is:

QC ₀+RQC _t＝V _Rr _C+Q(1+R)C _t………………………………(29)

In formula, the flow of Q---reaction solution, m;

R---reflux ratio, i.e. Matter Transfer ratio or volume ratio;

C ₀---the concentration of water inlet mesostroma, mg/L;

C _t---the concentration of phegma and water outlet mesostroma, mg/L;

V _r---the effective volume of device, L:

R _c---the speed of reaction in biochemical kinetics, mg/ (Lh).

Can be obtained fom the above equation:

$r_C=\frac{Q(C_0-C_t)}{V_R}...\left(30\right)$

If make hydraulic detention time (HRT) be t in formula only represents the hydraulic detention time of material in device, and does not represent the true residence time of a certain micro unit, and unit is h, formula (21) is substituted into formula (30), can obtain the expression formula of the hydraulic detention time T of auto levelizer:

$\mathrm{\&tau;}=\frac{Q(C_0-C_t)}{\mathrm{kcX}\&CenterDot;Q}=\frac{C_0-C_t}{\mathrm{kcX}}...\left(31\right)$

(2) device effective volume

Apparatus of the present invention effective volume V can be obtained by formula (30) and formula (21) _rfor:

$V_R=\frac{Q(C_0-C_t)}{\mathrm{kCX}}...\left(32\right)$

In formula, V _r---device effective volume, L.

(3) reflux ratio

If reflux ratio is R, then returned sluge flow is RQ.Under steady state conditions, a reactor, device bacterium is accounted:

Input+internal circulating load+increment=work output

That is:

QX ₀+RQX _t＝Q(1+R)X _t………………………………(33)

In formula, Q---reaction solution flow, L;

X _o---bacterial concentration in water inlet, mg/L;

X _r---bacterial concentration in phegma, mg/L;

R---rate of bacterial growth, mg/ (L.h);

X ₁---bacterial concentration in device water outlet, mg/L.

$R=\frac{X_1}{X_r-X_1}...\left(34\right)$

Visible, in device, bacterial concentration (sludge concentration) is closely related with the value of reflux ratio, useful volume and sludge condensation coefficient.Therefore it is most important to choose suitable reflux ratio in the design process.

7. apparatus of the present invention are applied in simultaneous denitrification dephosphorization experiment

Circulation nitration reaction district B is the reaction times in operating parameter is 4-6h, MLSS controls in the scope of 2500-7000mg/L, aerobic zone C (rising area) DO is in 2-5mg/L, oxygen negative area (decline district) DO that holds concurrently is in 0.3-1.0mg/L, the pH value of circulation nitration reaction district B is 7-7.8, and reflux ratio is 2.5-5.Substantially removing organic pollutant, ammonia nitrogen and phosphorus is achieved.

Its characteristic is: circulation nitration reaction district B be the reaction times be 4-6h operational conditions in operating parameter under continuum micromeehanics run, (1) when influent COD is about 300mg/L, the COD of water outlet can be reduced to 13mg/L, the clearance of COD can reach about 95%, (2) when the ammonia nitrogen of intaking is 118.7mg/L, the ammonia nitrogen concentration of water outlet is 5-15mg/L, and the clearance of ammonia nitrogen reaches more than 93%; (3) when water inlet phosphate concn be about 10.5mg/L constantly, the phosphate concn of water outlet also at about 2.7mg/L, removal rate of phosphate average out to 73.8%.Adopt SEM and opticmicroscope to carry out biophase observation to biological particles in system and suspension microorganism respectively, the microbial components in discovery system is complicated and grow fine, and multiple-microorganism coexists mutually.There is a large amount of suis, tyrothricin and a small amount of thread fungus in anaerobic zone, aerobic zone exists a large amount of stock bacterium, thread fungus and a small amount of coccus, also has many protozoon metazoans such as ciliate, nematode to exist in suspended sludge.

Apparatus of the present invention are to SS, BOD ₅, CODcr, ammonia nitrogen, total nitrogen and phosphorus removal:

(1) removal of SS

In sewage effluents, concentration of suspension not only relates to water outlet SS index, the BOD in water outlet ₅, the index such as CODcr, TP is also relevant with it.Because the main component forming water suspension is active pollution index, itself organic component is just high, and organism itself is phosphorous, therefore highlyer goes out the BOD that water suspension content can make water outlet ₅, CODcr and TP increase.So the SS index controlling sewage effluents is the most basic, is also very crucial.Select appropriately in processing scheme, processing parameter value is rationally and under the condition optimizing the design of monomer structures, water outlet SS index can be made completely to meet the requirement of national standard.Apparatus of the present invention complete the deodorizing dephosphorization denitrogenation process of waste water with the powerful rhizome system of plant and ecological filler, and quiescent setting compares the mode of continuous precipitation, can ensure the SS of lower concentration water outlet.

(2) BOD ₅removal

BOD in sewage ₅removal be by the adsorption of microorganism and metabolism, to BOD ₅degraded, utilizes BOD ₅synthesize new cell, then mud is separated with water, thus complete BOD ₅removal.Microorganism in active sludge is under the condition of aerobic, and by a part of organism in sewage for the synthesis of new cell, another part organism is carried out katabolism to obtain the energy needed for cell synthesis, its final product is CO ₂and H ₂the stable materials such as O.In anabolism and catabolic process, dissolved organic matter (as low molecular organic acids etc.) directly enters cell interior and is utilized, but not first dissolved organic matter is then attracted to antimicrobial surface, enters cell interior after being then hydrolyzed by extracellular enzyme and be utilized.As can be seen here, the aerobic metabolism of microorganism all works to the dissolved organic matter in sewage and non-solubility organism, and meta-bolites is harmless stable material, therefore, can make the remaining BOD in sewage after process ₅concentration is very low.

In apparatus of the present invention, by active bio flora digestion organic pollution materials, improve natural purifying ability, to reach the object purified water.Except the bacterium found in traditional active sludge system, also inoculation has other 2000-3000 kind of plant, animal and microorganism.The organism inoculated has oneself's synthesis and absorbs the ability of sun power, and this ability ensure that pollutent obtains biological degradation to greatest extent.

(3) removal of CODcr

The principle that in sewage, CODcr removes and BOD ₅substantially identical.

The clearance of Sewage Plant CODcr, depends on the biodegradability into water, and the composition of its sewage is relevant.For sanitary sewage, its BOD ₅/ CODcr>=0.5, the good biodegradability of sewage, water outlet CODcr value can control, in lower level, can meet the demands.

The sewage of process of the present invention mainly based on sanitary sewage, its BOD ₅/ CODcr value is 0.5, and sewage has good biodegradability, adopts second-stage treatment technique to meet the demands.

(4) removal of ammonia nitrogen

Sewage goes method for removing ammonia nitrogen to mainly contain physico-chemical processes and the large class of biological process two, and in sanitary sewage disposal industry, biological process removes ammonia nitrogen is main flow, is also method economic and conventional in sanitary sewage disposal.

Nitrogen is the indispensable integral part of protein, is therefore extensively present among sanitary sewage.In raw waste water, nitrogen is with NH ₄the form of+-N and organonitrogen exists, and the nitrogen of these two kinds of forms is combined and is referred to as kjeldahl nitrogen, represents with TKN.And NOx-N (comprising nitrite and nitrate) content in raw waste water is little, almost nil.These multi-form nitrogen are referred to as total nitrogen (TN).

Nitrogen is also one of the element forming microorganism, and a part enters nitrogen in cell paste will with excess sludge-rise and remove from water.This part nitrogen quantity is about removed BOD ₅5%, be 12% of microorganism wt, account for 4% of Sewage treatment systems residual active sludge amount.

While organism is oxidized, the organonitrogen in sewage is also oxidized to ammonia nitrogen, sufficient at dissolved oxygen, when load is lower, mud age is longer, is oxidized to nitrite and nitrate further, is usually referred to as nitrifying process.Its reaction equation is as follows:

NH ₄ ⁺+1.5O ₂→NO ₂ ^-+2H ⁺+H ₂O

N O ₂ ^-+0.5O ₂→N0 ₃ ^-

The first step reaction completes by Nitrosomas, and second step reaction completes by nitrifier, and total reaction is:

NH ₄ ⁺+2O ₂→NO ₃ ^-+2H ⁺+H ₂O

Therefore, adopt the plant absorption ammonia nitrogen of flourishing rhizome, clearance is high.

(5) removal of total nitrogen

Ammonia nitrogen in waste water is oxidized to nitrate through nitrification, although the concentration of ammonia nitrogen reduces, the total nitrogen in waste water is not reduced, and for reducing total nitrogen, just must remove the nitrate nitrogen in waste water.The most ripe technique is denitrification at present, namely under anoxic conditions, under the effect of facultative denitrifier (denitrifying bacteria), nitrate nitrogen is reduced into nitrogen effusion, thus reduces the total nitrogen in waste water.Make carbon source for methyl alcohol, its reaction equation is as follows:

6NO ₃-+2CH ₃OH→6NO ₂-+2CO ₂+4H ₂O

6NO ₃-+3CH ₃OH→3N ₂+3CO ₂+3H ₂O+6OH-

Apparatus of the present invention support plant 4 by arranging many group water in contact-oxidation pool 2, absorb ammonia nitrogen, thus improve the clearance of total nitrogen with the flourishing rhizome of plant.

(6) removal of phosphorus

Biological phosphate-eliminating be polyP bacteria in sewage under anaerobic, be subject to constraining and the phosphoric acid salt that discharges in body, generate energy in order to absorb fast degradation organism, and is converted into PHB (poly-β hydroxybutyric acid) and stores.PHB generate energy when these polyP bacterias enter under aerobic condition with regard to storing in degraded body, for synthesis and the suction phosphorus of cell, forms the phosphorus containing sludge of high density, discharges system, thus reach the object of dephosphorization with excess sludge.

The rhizome that apparatus of the present invention utilize water to support plant 4 prosperity absorbs phosphorus, without power consumption in operational process, avoids the use of chemical substance completely, and expense is added in the replacing of maintenance costs and broken filler that maintenance cost is only plant.

If carry out closed deodorizing between sludge dewatering, investment can be increased, and management is also inconvenient.Because apparatus of the present invention do not establish preliminary sedimentation tank, do not have raw sludge, mud residence time in sludge sump is short, and carries out aerobic sigestion, and sealing treatment, the stink distributed can weaken to some extent.Arrange separately between sludge dewatering and between fortune mud, note at ordinary times strengthening management, the mud of generation press dry outward transport in time, and the impact of stink can control in the scope of bearing.If enclosed centrifugal drier can be adopted, then more can weaken distributing of stink.

In apparatus of the present invention, obvious by plant action deodorising effect, and can landscape effect be improved.Greatly reduced by the sewage stink after ecological deodorizing district A process.

Adopt apparatus of the present invention transformation or newly-built Sewage treatment systems external form view beautiful.Outside also can have greenhouse, and greenhouse adopts light steel frame structure glass chamber; Be ecoscape in system, the deodorizing of built-in stereo ecological outer circulation nitrification installation; Greenhouse can guarantee that plant and other organism keep vigorous vigor under preferred ambient temperature, and this ecological sewage treatment facility, can build remote districts in, can be applicable to require strict high-grade community, and has positive effect to the environmental protection of each community.

8. in Sewage treatment systems upgrading, apply comparing of apparatus of the present invention and traditional technology

See Figure 12, the present invention compares with MBR technique, contact oxidation technology, no matter be effluent quality, stable effluent quality, Nitrogen/Phosphorus Removal, deodorizing subtract carbon effect, excess sludge index or other indexs of correlation, working cost, be all better than other two kinds of techniques.As can be seen here, adopt the wastewater effluent water quality after apparatus of the present invention process good, Absorbable organic halogens reaches country-level A standard, meets Treated sewage reusing requirements such as afforesting, flush the toilet, also can be used as ecoscape make up water.Meanwhile, particularly have extremely excellent denitrification effect, water outlet ammonia nitrogen can reach surface water II generic request, overcomes the defect that other technique denitrification effects are low.It has good ecological purification environment, and resistance to overload shock ability is strong, and stable effluent quality, excess sludge is few.And not only effluent quality is good, and external form view is beautiful, and operating automation degree is high, substantially can realize unmanned.

Apparatus of the present invention adopt integrated technology, facility characteristics of compact layout, can select suitable element number to carry out layout footprint as required, due to integrated setting, construction investment and operational and administrative expenses lower.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. smart three-dimensional ecological internal circulation nitrifying method, for in Sewage treatment systems upgrading, it is characterized in that, that the contact-oxidation pool of sewage disposal is transformed into settling tank, and roof solar power generation assembly is set above this settling tank, periphery arranges aerogenerator, to generate electricity to whole operation of sewage disposal system, in described settling tank pond, at least one stereo ecological internal recycle nitration treatment unit is set, each stereo ecological internal recycle processing unit is embarked on journey according to application place, in column or in array format, and ecological deodorizing district and circulation nitration reaction district are set from top to bottom at each described stereo ecological internal recycle de-nitrification unit, described ecological deodorizing district is provided with plant basket, is positioned at above described circulation nitration reaction district, described circulation nitration reaction district is arranged at a circulation and holds concurrently in oxygen case, oxygen case from-inner-to-outer of this circulation being held concurrently is divided into aerobic zone and double oxygen negative area, the hold concurrently central zone of oxygen case of described circulation is described aerobic zone, in described aerobic zone, aeration element is set, its top is communicated with described double oxygen negative area, and bottom is provided with internal recycle water inlet, the top of holding concurrently in oxygen case in described circulation is vertically installed with diaphragm, and described plant basket bottom is fixed in this diaphragm upper end, and lower end extends to described double position, oxygen negative area and is in same level position with described aeration element, introduce the flow during sewage disposal in controller control pond, the content of dissolved oxygen, temperature in pond and sludge concentration, sewage is introduced described aerobic zone by water inlet pipe, then make described aerobic zone fluid density lower than described double oxygen negative area by the aeration effect of aeration element, with the density difference that both formation is interval, liquid between Shi Liangge district produces flowing, the liquid of aerobic zone is moved to double oxygen negative area, sewage is through aerobic, hold concurrently after oxygen reacts and again reentered aerobic zone by the Involving velocity of aeration element, make multiple stereo ecological internal recycle de-nitrification unit under continuous running status, the Gradient distribution of dissolved oxygen can be realized in oxygen case is held concurrently in circulation, form the short distance nitration consuming endogenous carbon source, anti-nitration reaction, sewage after nitration reaction flows out the settling tank outside internal recycle nitration treatment unit, supernatant liquor is finally flowed out by water outlet.

2. smart three-dimensional ecological internal circulation nitrifying method according to claim 1, is characterized in that, the volumetric ratio of described aerobic zone and double oxygen negative area is 1-2.5:0.4-1, and its operating parameter is: the aerobic zone reaction times is 4-6h; Mixed genetic-neural network controls at 2500-7000mg/L; Aerobic zone dissolved oxygen is 2-5mg/L, and oxygen negative area dissolved oxygen of holding concurrently is 0.3-1.0mg/L, and circulation nitration reaction district pH value is 7-7.8.

3. adopt the smart three-dimensional ecological internal circulation nitrification installation of method design described in claim 1 or 2, it is characterized in that, that the contact-oxidation pool of sewage disposal is transformed into settling tank, and above this settling tank, be provided with roof solar power generation assembly and this settling tank periphery arranges aerogenerator, controlled by master controller; At least one stereo ecological internal recycle de-nitrification unit is provided with in described settling tank, each stereo ecological internal recycle processing unit is embarked on journey according to application place, in column or in array format, and each described processing unit stereo ecological internal recycle de-nitrification unit is divided into ecological deodorizing district and circulation nitration reaction district from top to bottom, described circulation nitration reaction district from-inner-to-outer is divided into aerobic zone and double oxygen negative area, described ecological deodorizing district is provided with plant basket, be positioned at above described circulation nitration reaction district, in described plant basket, plantation has water to support plant; Described circulation nitration reaction district is arranged at a circulation and holds concurrently in oxygen case, this circulation oxygen case central zone of holding concurrently is described aerobic zone, aeration element is provided with in described aerobic zone, top is communicated with described double oxygen negative area, bottom is provided with internal recycle water inlet, described circulation oxygen case internal upper part of holding concurrently has vertically disposed diaphragm, and described plant basket bottom is fixed in this diaphragm upper end, and lower end extends to described double position, oxygen negative area and is in same level position with described aeration element; Described double oxygen negative area is around the region be located at beyond described aerobic zone, and described circulation oxygen lower box part of holding concurrently is provided with mud thrust-augmenting nozzle; Described master controller is also electrically connected with flow director, dissolved oxygen controller, temperature regulator and sludge concentration controller.

4. smart three-dimensional ecological internal circulation nitrification installation according to claim 3, it is characterized in that, described circulation oxygen case of holding concurrently is fixed in described settling tank, is positioned at described plant basket bottom and is connected and fixed with this plant basket, and described water supports plant root, and to extend described circulation oxygen case of holding concurrently inner.

5. smart three-dimensional ecological internal circulation nitrification installation according to claim 3, it is characterized in that, described circulation hold concurrently oxygen case suspend be arranged in described settling tank, be positioned at described plant basket bottom with and be connected and fixed with this plant basket, described water supports plant root, and to extend described circulation oxygen case of holding concurrently inner.

6. smart three-dimensional ecological internal circulation nitrification installation according to claim 5, it is characterized in that, one suspension device is set, connects described plant basket bottom and described circulation and to hold concurrently the periphery of oxygen case upper end, make described plant basket and described circulation oxygen case of holding concurrently suspend and be arranged in described settling tank.

7. the smart three-dimensional ecological internal circulation nitrification installation according to any one of claim 3-6, is characterized in that, described circulation is held concurrently in oxygen case and is provided with biologic packing material, is fixed and holds concurrently in oxygen case in described circulation, form described aerobic zone by filler anchor.

8. the smart three-dimensional ecological internal circulation nitrification installation according to any one of claim 4-6, is characterized in that, described plant basket upper end arranges and the interconnective unit of each stereo ecological internal recycle de-nitrification unit can be made to connect draw-in groove.

9. the smart three-dimensional ecological internal circulation nitrification installation according to any one of claim 4-6, is characterized in that, is provided with and supports the rhizome of plant and adsorbable, degrading microorganism, absorption foul smell deodorant filler for supporting water in described plant basket.