CN104193005A - Small fluidized bed sewage treatment system and operating method thereof - Google Patents
Small fluidized bed sewage treatment system and operating method thereof Download PDFInfo
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- CN104193005A CN104193005A CN201410446942.2A CN201410446942A CN104193005A CN 104193005 A CN104193005 A CN 104193005A CN 201410446942 A CN201410446942 A CN 201410446942A CN 104193005 A CN104193005 A CN 104193005A
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Abstract
The invention discloses a small fluidized bed sewage treatment system and an operating method thereof. The sewage treatment system is simple and compact in structure, small in occupied area, and strong in process adaptability; when used for treating sewage, the sewage treatment system has the advantages that the operating cost is low and less sludge is produced; the sewage treatment system is wide in application range, and can simultaneously treat soluble and particle-containing wastewater, and can run stably; and by adjusting the air supply proportion of aeration devices at the bottom and upper parts of an aerobic fluidized bed, the internal circulation or non-circulation of solid bed materials on which active biofilms grow is implemented; therefore, the sewage treatment system is especially suitable for the field of small-scale sewage treatment.
Description
Technical field:
The present invention relates to sewage treatment area, be specifically related to a kind of small-sized fluidized bed Sewage treatment systems and operation method thereof.
Background technology:
" the comprehensive programme of work of " 12 " energy-saving and emission-reduction " (No. (2011) 26, promulgated by the State Council) advances town sewage treatment facility and supporting pipeline network construction, promotes existing utility, intensified denitrification and dephosphorization.By 2015, substantially realize all counties and emphasis organic town possesses sewage treatment capacity, the newly-increased sewage daily handling ability forty-two million ton in the whole nation, approximately 160,000 kilometers of newly-built supporting pipe networks, treatment rate of domestic sewage reaches 85%, forms chemical oxygen demand (COD) and ammonia nitrogen and cuts down 2,800,000 tons, 300,000 tons of abilities.Continue propulsion energy-saving and reduce discharging scientific and technological special campaigns, the general character such as organizationally efficient energy-conservation, changing waste into resources and small-sized decentralized wastewater processing, Control of Agricultural Non-point Source Pollution, key and cutting edge technology tackling key problem.
Owing to may containing the pathogenic microorganism of energy in waste water, can promoting the nutritive substance of aquatic plants growth and other toxic compounds that may cause a disease; for the health of to protect mankind, waste water must be through suitable processing in re-using or before directly entering environment.Wastewater treatment generally includes coagulation (physical treatment), second-stage treatment (biochemical treatment) and tertiary treatment (advanced treatment).Owing to all containing biodegradable composition in nearly all waste water, therefore, various nutritive ingredients (BNR) in employing biological degradation method removal waste water just become the waste water treatment process process of extensive employing, it not only can remove the organic pollutant in waste water, but also can effectively remove nitrogen and phosphorus in waste water.
The research that biological fluidized bed is disposed of sewage and application start from the Environmental Protection Agency of 20 century 70s.Japan carries out a large amount of biological fluidized bed research work, representative Shi Li field company and Mitsubishi at the beginning of the eighties.
The domestic research to biological fluidized bed is started late, and Lanzhou Petrochemical Company research institute in 1978 environmental protection starts the research work of pure oxygen aeration biological fluidized bed processing petrochemical wastewater.Domestic main research be air aeration fluidized-bed, studying as main fluidized-bed process taking the air-bed of holding concurrently of the city domestic sewage that 1980 Chengdu political affairs designing institutees, Beijing environmental protection institute, Harbin Institute of Technology, Wuhan Df "Vodokanalingenering" etc. carry out, within 1984, Fushun oil institute adopts jet-flow aeration three-phase bed Refinery Wastewater.Main research lays particular emphasis on search operation mode, carrier characteristics, oxygen charging method, microbial film control and renewal, recommends on this basis design variable.
Application number is the method and apparatus that 03128090.0 patent documentation discloses a kind of city domestic sewage processing, it is that hotel, restaurant sanitary sewage are first carried out to oil removal after slag pre-treatment, enter again three-phase biological fluidized bed reactor, allow sewage stay for some time in reactor and carry out biochemical oxidation reaction, this reactor comprises that reaction zone, carrier separate and stripping region, liquid-solid separating region, reaction zone comprises urceolus, inner draft tube, control dam conduit, waste water, air-distributor; Carrier separating and stripping region comprises expansion conduit and flow apron; Liquid-solid separating region comprises flow deflector and water outlet distributor.Control dam catheter cartridge at inner draft tube dress the centre with urceolus, bio-carrier is all equipped with in reaction zone, reactor lower part is equipped with air-distributor, influent waste water sparger is equipped with in inner draft tube bottom, and be connected with header tank or water pump, sewage after treatment can meet or exceed the sewage discharge primary standard that GB8978-1996 specifies.Application number is the patent documentation of 200580005561.X, by immobilized biological membrane fluidization and biological nutrients remove technique whole and liquid-solid circulating fluidized bed to one in, reached the object of simultaneously removing carbon nitrogen phosphorus.Liquid-solid circulating fluidized bed biological nutrients removal system contains two fluidized-beds, respectively with hypoxic/anaerobic and aerobic process operation, by the continuous solid-liquid recirculation between hypoxic/anaerobic bed and aerobic bed, complete synchronous nitration/denitrification and remove carbon substrate, nutrition and phosphorus.Application number provides a kind of multifunctional biological film fluidized bed and operational mode for 200810158214.6 patent documentations, this multifunctional biological film fluidized bed body that comprises, in bed body, be provided with successively from bottom to top water inlet pipe, perforation water distribution board, screen cloth and membrane module, it is characterized in that: bed body top is provided with the rising pipe passing in membrane module, screen cloth is divided into two-layer up and down by water distribution board to the part between membrane module of boring a hole in bed body, the upper and lower two-layer interior filler that is all filled with, the upper and lower are equipped with aeration tube, on the aeration tube of the upper and lower, be all connected with air intake valve and under meter.This is multifunctional biological film fluidized bed realizes facultative-aerobic, anaerobism, anaerobic-aerobic and the operational mode such as aerobic.The patent documentation that application number is 201110330215 provides a kind of integrated high-efficiency energy saving sewage disposal device.Its technical scheme is: it comprises the columned reactor body of integrally closed, in described reactor body, be also provided with inner core one and the inner core two of two suits, described reactor body is also set with urceolus outward, the upper and lower opening of described inner core one and inner core two is completely open, in cavity between described urceolus and reactor body, be filled with haydite, the top liquid level of described reactor body is communicated with tracheae above, and the other end of described tracheae inserts haydite bottom.Application number for 201210131085 patents provide a kind of anaerobic fluidized bed-Sewage treatment systems and the method for micro-aerobic membrane bioreactor, it relates to Sewage treatment systems and method, and this invention will solve prior art---the large and high problem of energy consumption of aerobic activated sludge process occupied ground area.This system is formed by anaerobic fluidized bed and micro-aerobic membrane bioreactor series combination, and sewage first, by anaerobic fluidized bed acidifying and the anaerobically fermenting of being hydrolyzed, then enters micro-oxygen bio-reactor, finally utilizes suction pump that water outlet is entered to clean water basin.Application number is a kind of removal method that 201310676295 patent documentation discloses high rigidity ammonia nitrogen in waste water based on MBBR, belongs to sewage treatment area.For the ammonia nitrogen of high hardness water, by adopting MBBR technique to process, be intended to solve biochemical process in the past and be difficult to the problems such as startup, poor removal effect and treatment effect are unstable, easy fouling.This invention technical scheme comprises that inoculation starts, high rigidity starts, the operation of high rigidity Continuous Flow, and final ammonia nitrogen face load is greater than 0.83gN/m
2/ d, stablize≤5mg/L of water outlet ammonia nitrogen, meets the requirement of municipal wastewater treatment plant pollutant emission standard to ammonia nitrogen.
Above-mentioned patent does not all relate to utilizes gas-liquid-solid three-phase fluidized bed to carry out small-sized dispersed sewage disposal.
Summary of the invention:
The object of this invention is to provide the extremely operation method of small-sized fluidized bed Sewage treatment systems that a kind of cost is low, Technological adaptability is strong.
The present invention is achieved by the following technical programs:
A kind of small-sized fluidized bed Sewage treatment systems, comprises and concentrates on be communicated with successively in a reactor aerobic fluidized bed, hypoxic/anaerobic fluidized-bed, bed material granules regeneration bed and sludge settling bed; In described aerobic fluidized bed and hypoxic/anaerobic fluidized-bed, be filled with Solid Bed material, on described Solid Bed material, growth has active biological film, describedly also be provided with aerating apparatus in aerobic fluidized bed, the middle and upper part of the sides adjacent of described aerobic fluidized bed and hypoxic/anaerobic fluidized-bed is provided with a bed material particles circulating mouth, top is provided with aerobic fluidized bed outlet; On Solid Bed material emulsion zone in described aerobic fluidized bed and hypoxic/anaerobic fluidized-bed, interface is a little less than bed material particles circulating mouth; Described aerobic fluidized bed outlet is also communicated with the top of bed material granules regeneration bed; Described hypoxic/anaerobic fluidized-bed bottom is provided with water-in, and described hypoxic/anaerobic fluidized-bed is provided with bed material returning charge mouth with the middle and lower part of bed material granules regeneration bed sides adjacent; The middle part of described bed material granules regeneration bed and sludge settling bed sides adjacent is provided with the outlet of bed material granules regeneration bed; Described sludge settling bed bottom is provided with sludge outlet, and top is provided with sewage outlet; The water outlet that the water-in that described aerobic fluidized bed bottom is provided with is provided with top via backflow water pipe is communicated with, the liquid circulation that aerobic fluidized bed top water outlet flows out is to the water-in of aerobic fluidized bed bottom, realize the fluidisation of bed material in bed, the water outlet at aerobic fluidized bed top is also communicated with the water-in of hypoxic/anaerobic fluidized-bed bottom through backflow water pipe, realizes aerobic fluidized bed interior partially liq and is circulated in hypoxic/anaerobic fluidized-bed; The water outlet at described hypoxic/anaerobic fluidized-bed top and the water-in of bottom are by backflow cross current, and the bed material in hypoxic/anaerobic fluidized-bed is by the self-circulation liquid in the raw waste water, the bed that are entered bed by the water-in of bottom and realize from aerobic fluidized bed interior circulating liquid the fluidisation that in bed, bed is expected on a small quantity.
Described aerating apparatus is stratified and set on aerobic fluidized bed bottom and top in pairs.The aerating apparatus of aerobic fluidized bed bottom arranges near aerobic fluidized bed bottom as far as possible, is conducive to aeration bubble the particle of aerobic fluidized bed bottom is played good stirring and carries effect secretly when aeration.The aerating apparatus on described aerobic fluidized bed top is a little more than interface on aerobic fluidized bed interior bed material emulsion zone.Ensureing that aeration bubble does not affect under the prerequisite of bed material particle in emulsion zone substantially, increase the aeration degree of depth of aerating apparatus as far as possible, can the in the situation that of the system of guarantee air demand, reduce system air feed energy consumption.
Described aerating apparatus can adopt the conventional M215 disk aeration head of sewage treatment project or micropore aeration pipe or other can reach the aerating apparatus of equivalent effect.
Described bed material returning charge mouth is provided with L returning charge valve and utilizes waterpower returning charge, or the machinery returning charge of spiral material-returning device or both combinations.
Described bed material granules regeneration bed outlet is provided with inertial separator or filter screen.
In the time not needing particles circulating, described aerobic fluidized bed outlet is also provided with a material separating device, and described bed material separating device is inclined tube sedimentation bed material or filter screen.
In described bed material granules regeneration bed, be added with chemical dephosphorization medicament, with enhanced system phosphor-removing effect.
The application also provides the operation method of above-mentioned small-sized fluidized bed Sewage treatment systems, it is characterized in that, raw waste water is introduced into hypoxic/anaerobic fluidized-bed to be carried out denitrification, denitrogenation, releases phosphorus, then flow through successively aerobic fluidized bed, bed material granules regeneration bed, sludge settling bed inhaled respectively phosphorus, nitrated, solid-liquid separation, and the sewage that obtains handling well and mud are finally discharged fluidisation bed waste water treatment system; By regulate the air feed ratio of aerobic fluidized bed bottom and top aerating apparatus realize growth in aerobic fluidized bed and hypoxic/anaerobic fluidized-bed have active biological film Solid Bed material internal recycle or do not circulate.
Under Solid Bed material circular flow operating mode, regulate aerobic fluidized bed interior bed material to be carried and flow out aerobic fluidized bed quantity by bubble by increasing aerobic fluidized bed bottom aerating apparatus air feed ratio, the aerobic fluidized bed bed material flowing out from aerobic fluidized bed outlet enters bed material granules regeneration bed and enter hypoxic/anaerobic fluidized-bed from bed material returning charge mouth after Solid-Liquid Separation, adding due to new particle in hypoxic/anaerobic fluidized-bed, bed height raises, part particle flows into aerobic fluidized bed through bed material particles circulating mouth, there is the internal recycle of active bio membrane granule thereby realized fluidized-bed Sewage treatment systems load.
Bed material granules regeneration bed enters hypoxic/anaerobic fluidized-bed from bed material returning charge mouth after Solid-Liquid Separation, adopts direct sedimentation returning charge or utilizes the mechanical returning charges such as waterpower returning charge or spiral material-returning device such as L returning charge valve, or adopt the combination of aforesaid method.
Expect under not circular flow operating mode at bed, by reduce aerobic fluidized bed bottom aerating apparatus air feed ratio make aerobic fluidized bed interior bed material substantially not by bubble carry flow out aerobic fluidized bed.Thereby the fluidized bed material of small-sized fluidized bed Sewage treatment systems is not circulated substantially.
Expect that at bed, under not circular flow operating mode, aerobic fluidized bed exit can arrange inclined tube sedimentation filler or filter screen, to strengthen separating of bed material and liquid phase, the effect substantially not circulating with the fluidized bed material of enhanced compact fluidized-bed Sewage treatment systems.
Aerobic fluidized bed by a fluidisation for bed material in the liquid self circulation realization bed in bed, the partially liq in the while is aerobic fluidized bed need be circulated in hypoxic/anaerobic fluidized-bed.Hypoxic/anaerobic fluidized-bed is by the former water of sewage entering bed, the self-circulation of the interior liquid of bed and the fluidisation of expecting from the interior bed of aerobic fluidized bed interior circulating liquid realization bed on a small quantity.
In bed material granules regeneration bed, can expect particle by the new bed of regular replenishment, by by active sludge and a bed material particle (comprise new add bed material particle and may exist expect particle from circulate original of coming of aerobic bed) vexed quick-fried, make to form on particle active immobilized biomembrane.The bed material particle running off with replenishment system, ensures bed material total amount in fluidized-bed Sewage treatment systems, makes hypoxic/anaerobic fluidized-bed and aerobic fluidized bed interior close phase section highly substantially keep constant.
Under the circulation of bed material or not circular flow operating mode, according to biological phosphor-removing effect, in described bed material granules regeneration bed, can add chemical dephosphorization medicament with enhanced system phosphor-removing effect.
Compared with prior art, the present invention has following beneficial effect:
(1) the application is simple in structure, compact, floor space reduces greatly, Technological adaptability is strong, having realized anaerobic reaction, aerobic reaction and hypoxia response is integrated in same reactor, combine the advantage of suspension growth BNR process and fixing film reaction unit, mud can settleability good and corresponding the reducing for the treatment of pond size that require.
(2) utilize the application to dispose of sewage, cost is low: first, the demand of oxygen is reduced greatly, required energy consumption also just decreases a lot; Secondly, as the solid particulate of microbial bacterial membrane carrier, in working cycle, biomembranous coming off can be used as the required carbon source of denitration reaction, and therefore system also can reduce the demand of carbon source; Again, this fluidised bed system has the function of dephosphorization, and the consumption of chemical method dephosphorization reagent reduces greatly.
(3) the application's applied range, due to solid particulate in fluidized-bed all the time in suspended state, simultaneously processing soluble and waste water that contain particle.And due to biomembranous well maintained performance, the stability of process operation is also significantly improved.In addition,, due to the lower sludge yield of hypoxia response district internal ratio oxygen process, it is minimum that the generation of chemical sludge can reduce to.The application has biology self degraded than the longer sludge age of fixed biologically membrane process and Geng Gao, and the generation of biological sludge is also effectively controlled.
In a word, the application is simple in structure, compact, floor space is little, and Technological adaptability is strong, utilizes the application to dispose of sewage, running cost is low, sludge creation amount is few, applied range, processing soluble and waste water and system run all right that contain particle simultaneously, by regulate aerobic fluidized bed bottom and top aerating apparatus air feed ratio realize growth have active biological film Solid Bed material internal recycle or do not circulate, be particularly suitable for small-sized sewage treatment area.
Brief description of the drawings:
Fig. 1 is the application's structural representation;
Fig. 2 is the application's system flowchart under bed material particles circulating operation condition;
Fig. 3 is the application's system flowchart under not circular flow of bed material particle operating mode;
Wherein, 1, aerobic fluidized bed; 2, hypoxic/anaerobic fluidized-bed; 3, bed material granules regeneration bed; 4, sludge settling bed; 5, aerating apparatus; 6, bed material particles circulating mouth; 7, aerobic fluidized bed outlet; 8, bed material returning charge mouth; 9, bed material granules regeneration bed outlet; 10, sewage outlet; 11, sludge outlet; 12, bed material separating device.
Embodiment:
Below to further illustrate of the present invention, instead of limitation of the present invention.
Embodiment 1:
As shown in Fig. 1 or 3, a kind of small-sized fluidized bed Sewage treatment systems, comprises and concentrates in a reactor be communicated with successively aerobic fluidized bed 1, hypoxic/anaerobic fluidized-bed 2, bed material granules regeneration bed 3 and sludge settling bed 4; Described aerobic fluidized bed 1 and hypoxic/anaerobic fluidized-bed 2 in be filled with Solid Bed material, on described Solid Bed material, growth has active biological film, in described aerobic fluidized bed 1, be also provided with aerating apparatus 5, described aerobic fluidized bed 1 be provided with a bed material particles circulating mouth 6 with the middle and upper part of the sides adjacent of hypoxic/anaerobic fluidized-bed 2, top is provided with aerobic fluidized bed outlet 7; Described aerobic fluidized bed 1 and hypoxic/anaerobic fluidized-bed 2 in Solid Bed material emulsion zone on interface a little less than bed material particles circulating mouth 6; Described aerobic fluidized bed 1 is also communicated with the top of bed material granules regeneration bed 3 through aerobic fluidized bed outlet 7; Described hypoxic/anaerobic fluidized-bed bottom is provided with water-in, and described hypoxic/anaerobic fluidized-bed 2 is provided with bed material returning charge mouth 8 with the middle and lower part of bed material granules regeneration bed 3 sides adjacent; Described bed material granules regeneration bed 3 is provided with bed material granules regeneration bed outlet 9 with the middle part of sludge settling bed 4 sides adjacent; Described sludge settling bed 4 bottoms are provided with sludge outlet 11, and top is provided with sewage outlet 10; As shown in Figure 3, the water outlet that the water-in that described aerobic fluidized bed 1 bottom is provided with is provided with top via backflow water pipe is communicated with, the liquid circulation that the water outlet at aerobic fluidized bed 1 top flows out is to the water-in of aerobic fluidized bed 1 bottom, thereby realize the fluidisation of bed material in bed, the water outlet at aerobic fluidized bed 1 top is also communicated with the water-in of hypoxic/anaerobic fluidized-bed 2 bottoms through backflow water pipe, and the partially liq of realizing in aerobic fluidized bed 1 is circulated in hypoxic/anaerobic fluidized-bed 2; The water outlet at described hypoxic/anaerobic fluidized-bed 2 tops and the water-in of bottom are by backflow cross current, and the bed material in hypoxic/anaerobic fluidized-bed 2 is by the self-circulation liquid in the raw waste water, the bed that are entered bed by the water-in of bottom and realize from aerobic fluidized bed interior circulating liquid the fluidisation that in bed, bed is expected on a small quantity.
Described aerating apparatus 5 point two-layer aerobic fluidized bed 1 bottom and the top of being arranged in pairs, the aerating apparatus 5 of aerobic fluidized bed 1 bottom arranges near aerobic fluidized bed 1 bottom as far as possible, is conducive to aeration bubble the particle of aerobic fluidized bed 1 bottom is played good stirring and carries effect secretly when aeration.The aerating apparatus 5 on aerobic fluidized bed 1 top should be a little more than interface on aerobic fluidized bed interior bed material emulsion zone, substantially do not affect under the prerequisite of bed material particle in emulsion zone at guarantee aeration bubble, increase the aeration degree of depth of aerating apparatus as far as possible, can the in the situation that of the system of guarantee air demand, reduce system air feed energy consumption.
Described aerating apparatus 5 adopts sewage treatment project to commonly use M215 disk aeration head.
Described bed material returning charge mouth 8 is provided with L returning charge valve and utilizes waterpower returning charge.
Can be provided with as shown in Figure 3 the bed such as inclined tube sedimentation bed material or filter screen material separating device 12 at aerobic fluidized bed outlet 7 places, to strengthen separating of bed material and liquid phase, the effect substantially not circulating with the fluidized bed material of enhanced compact fluidized-bed Sewage treatment systems.
In described bed material granules regeneration bed 3, be added with chemical dephosphorization medicament, with enhanced system phosphor-removing effect.
The operation method of above-mentioned small-sized fluidized bed Sewage treatment systems, the water-in that raw waste water is provided with through hypoxic/anaerobic fluidized-bed 2 bottoms is introduced into hypoxic/anaerobic fluidized-bed 2 and carries out denitrification, denitrogenation, release phosphorus, then flow through and aerobic fluidized bed 1 inhale phosphorus through bed material particles circulating mouth 6, nitrated, complete C in sewage, N, removing of the nutritive substances such as P, what the sewage of processing flowed through from aerobic fluidized bed outlet 7 that 3 pairs of bed material granules regeneration beds may exist expects that from aerobic fluidized bed 1 circulate original of coming particle carries out precipitate and separate, finally enter sludge settling bed 4 from bed material granules regeneration bed outlet 9 and carry out solid-liquid separation, the sewage that obtains handling well and mud, then respectively through sewage outlet 10 and the final fluidisation bed waste water treatment system of discharging of sludge outlet 11, as shown in Figure 3, described aerobic fluidized bed 1 and hypoxic/anaerobic fluidized-bed 2 in Solid Bed material emulsion zone on interface a little less than bed material particles circulating mouth 6, by reducing aerobic fluidized bed 1 bottom aerating apparatus 5 air feed ratios (the aerating apparatus 5 air feed ratios on aerobic fluidized bed 1 bottom and top arrange by 10%:90%), thereby make aerobic fluidized bed 1 interior Solid Bed material substantially do not carried outflow aerobic fluidized bed 1 by bubble, the fluidized bed material of small-sized fluidized bed Sewage treatment systems is not circulated substantially.
Can expect particle by the new bed of regular replenishment at bed material granules regeneration bed 3, by active sludge is vexed quick-fried with bed material particle (comprising the new original material particle of coming from aerobic fluidized bed circulation that adds bed material particle and may exist), make to form on particle active immobilized biomembrane, the bed material particle running off with replenishment system, ensure bed material total amount in fluidized-bed Sewage treatment systems, make hypoxic/anaerobic fluidized-bed and aerobic fluidized bed interior close phase section highly substantially keep constant.
Utilize the present embodiment device and operation method thereof to dispose of sewage, experimental result sees the following form:
As seen from the above table, the clearance of total nitrogen reaches 85%, and the average removal rate of total COD reaches 84%, and the clearance of ammonia nitrogen reaches 88%.
Embodiment 2:
A kind of small-sized fluidized bed Sewage treatment systems, reference example 1, difference is: aerating apparatus 5 divides three layers of setting in pairs on aerobic fluidized bed 1 bottom and top, and aerating apparatus 5 is except adopting the conventional M215 disk aeration head of sewage treatment project, can also adopt micropore aeration pipe or other can reach the aerating apparatus of equivalent effect; Described bed material returning charge mouth 8 is provided with L returning charge valve, adopts direct sedimentation returning charge; Described bed material granules regeneration bed outlet 9 is provided with filter screen.
The operation method of above-mentioned small-sized fluidized bed Sewage treatment systems, the water-in that raw waste water is provided with through hypoxic/anaerobic fluidized-bed 2 bottoms is introduced into hypoxic/anaerobic fluidized-bed 2 and carries out denitrification, denitrogenation, release phosphorus, then flow through and aerobic fluidized bed 1 inhale phosphorus through bed material particles circulating mouth 6, nitrated, complete C in sewage, N, removing of the nutritive substances such as P, what the sewage of processing flowed through from aerobic fluidized bed outlet 7 that 3 pairs of bed material granules regeneration beds may exist expects that from aerobic fluidized bed 1 circulate original of coming particle carries out precipitate and separate, finally enter sludge settling bed 4 from bed material granules regeneration bed outlet 9 and carry out solid-liquid separation, the sewage that obtains handling well and mud are respectively through sewage outlet 10 and the final fluidisation bed waste water treatment system of discharging of sludge outlet 11, as shown in Figure 2 by increasing aerobic fluidized bed 1 bottom aerating apparatus 5 air feed ratios (aerobic fluidized bed 1 bottom and top aerating apparatus air feed ratio are pressed 50%:50% and arranged), regulate aerobic fluidized bed 1 interior bed material to be carried by bubble the quantity that flows out aerobic fluidized bed 1 from aerobic fluidized bed outlet 7.Flow out aerobic fluidized bed 1 bed material and enter hypoxic/anaerobic fluidized-bed 2 from bed material returning charge mouth 8 after bed material granules regeneration bed 3 Solid-Liquid Separation.In hypoxic/anaerobic fluidized-bed 2, due to the adding of new particle, bed height raises, and part particle flows into aerobic fluidized bed 1 through bed material particles circulating mouth 6.Whole process implementation the load of fluidized-bed Sewage treatment systems have the internal recycle of active bio membrane granule.
Can expect particle by the new bed of regular replenishment at bed material granules regeneration bed 3, by active sludge is vexed quick-fried with a bed material particle (comprising the new original material particle that adds bed material particle and come from aerobic fluidized bed circulation), make to form on particle active immobilized biomembrane.The bed material particle running off with replenishment system, ensures bed material total amount in fluidized-bed Sewage treatment systems, makes hypoxic/anaerobic fluidized-bed and aerobic fluidized bed interior close phase section highly substantially keep constant.Utilize the present embodiment device and operation method thereof to dispose of sewage, experimental result sees the following form:
As seen from the above table, the present invention is good to the treatment effect of sewage, and the clearance of total nitrogen reaches 81%, and the rate of removing of total phosphorus reaches 95%, and the average removal rate of total COD reaches 92%, and the clearance of ammonia nitrogen reaches 85%.
Claims (10)
1. a small-sized fluidized bed Sewage treatment systems, it is characterized in that, comprise and concentrate on aerobic fluidized bed (1), the hypoxic/anaerobic fluidized-bed (2), bed material granules regeneration bed (3) and the sludge settling bed (4) that in a reactor, are communicated with successively; In described aerobic fluidized bed (1) and hypoxic/anaerobic fluidized-bed (2), be filled with Solid Bed material, on described Solid Bed material, growth has active biological film, in described aerobic fluidized bed (1), be also provided with aerating apparatus (5), described aerobic fluidized bed (1) is provided with bed material particles circulating mouth (6) with the middle and upper part of the sides adjacent of hypoxic/anaerobic fluidized-bed (2), top is provided with aerobic fluidized bed outlet (7); On Solid Bed material emulsion zone in described aerobic fluidized bed (1) and hypoxic/anaerobic fluidized-bed (2), interface is lower than bed material particles circulating mouth (6); Described aerobic fluidized bed (1) is also communicated with the top of bed material granules regeneration bed (3) through aerobic fluidized bed outlet (7); Described hypoxic/anaerobic fluidized-bed (2) bottom is provided with water-in, and described hypoxic/anaerobic fluidized-bed (2) is provided with bed material returning charge mouth (8) with the middle and lower part of bed material granules regeneration bed (3) sides adjacent; Described bed material granules regeneration bed (3) is provided with bed material granules regeneration bed outlet (9) with the middle part of sludge settling bed (4) sides adjacent; Described sludge settling bed (4) bottom is provided with sludge outlet (11), top is provided with sewage outlet (10); The water outlet that the water-in that described aerobic fluidized bed (1) bottom is provided with is provided with top via backflow water pipe is communicated with, and the water outlet at aerobic fluidized bed (1) top is also communicated with the water-in of hypoxic/anaerobic fluidized-bed (2) bottom through backflow water pipe; The water outlet at described hypoxic/anaerobic fluidized-bed (2) top and the water-in of bottom are by backflow cross current.
2. small-sized fluidized bed Sewage treatment systems according to claim 1, is characterized in that, described aerating apparatus (5) is stratified and set on bottom and the top of aerobic fluidized bed (1) in pairs; The aerating apparatus on the top of described aerobic fluidized bed (1) is higher than bed material emulsion zone interface in aerobic fluidized bed (1).
3. small-sized fluidized bed Sewage treatment systems according to claim 1 and 2, is characterized in that, described bed material returning charge mouth (8) is provided with L returning charge valve or spiral material-returning device or both combinations; Described bed material granules regeneration bed outlet (9) is provided with inertial separator or filter screen.
4. small-sized fluidized bed Sewage treatment systems according to claim 1 and 2, is characterized in that, described aerobic fluidized bed outlet (7) is also provided with a material separating device (12); In described bed material granules regeneration bed (3), be added with chemical dephosphorization medicament.
5. small-sized fluidized bed Sewage treatment systems according to claim 4, is characterized in that, described bed material separating device (12) is inclined tube sedimentation bed material or filter screen.
6. the operation method of a small-sized fluidized bed Sewage treatment systems, it is characterized in that, raw waste water is introduced into hypoxic/anaerobic fluidized-bed to be carried out denitrification, denitrogenation, releases phosphorus, then flow through successively aerobic fluidized bed, bed material granules regeneration bed, sludge settling bed inhaled respectively phosphorus, nitrated, solid-liquid separation, and the sewage that obtains handling well and mud are finally discharged fluidisation bed waste water treatment system; By regulate the air feed ratio of aerobic fluidized bed bottom and top aerating apparatus realize growth in aerobic fluidized bed and hypoxic/anaerobic fluidized-bed have active biological film Solid Bed material internal recycle or do not circulate.
7. the operation method of small-sized fluidized bed Sewage treatment systems according to claim 6, it is characterized in that, regulate aerobic fluidized bed interior bed material to be carried and flow out aerobic fluidized bed quantity by bubble by increasing aerobic fluidized bed bottom aerating apparatus air feed ratio, the aerobic fluidized bed bed material flowing out from aerobic fluidized bed outlet enters bed material granules regeneration bed and enter hypoxic/anaerobic fluidized-bed from bed material returning charge mouth after Solid-Liquid Separation, adding due to new particle in hypoxic/anaerobic fluidized-bed, bed height raises, thereby part particle flows into and has aerobic fluidized bedly realized the load of fluidized-bed Sewage treatment systems and have the internal recycle of active bio membrane granule through bed material particles circulating mouth.
8. the operation method of small-sized fluidized bed Sewage treatment systems according to claim 6, it is characterized in that, thereby make aerobic fluidized bed interior bed expect that substantially not carried the aerobic fluidized bed fluidized bed material that makes small-sized fluidized bed Sewage treatment systems of outflow by bubble does not circulate substantially by reducing aerobic fluidized bed bottom aerating apparatus air feed ratio.
9. the operation method of small-sized fluidized bed Sewage treatment systems according to claim 6, it is characterized in that, the aerobic fluidized bed fluidisation that realizes bed material in bed by the liquid self circulation in bed, partially liq in simultaneously aerobic fluidized bed is circulated in hypoxic/anaerobic fluidized-bed, and hypoxic/anaerobic fluidized-bed is by the former water of sewage entering bed, self-circulation and a small amount of fluidisation that realizes interior material of bed from the circulating liquid in aerobic fluidized bed of the interior liquid of bed.
10. the operation method of small-sized fluidized bed Sewage treatment systems according to claim 6, it is characterized in that, at the new bed material of bed material granules regeneration bed regular replenishment particle, by active sludge is vexed quick-fried with bed material particle, make to form on particle immobilized active microbial film.
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| CN106830291A (en) * | 2017-01-18 | 2017-06-13 | 中国科学院广州能源研究所 | A kind of operation method of sewage disposal fluid bed |
| CN106904751A (en) * | 2017-03-29 | 2017-06-30 | 中国科学院广州能源研究所 | A kind of micro- heavy particle system and method for sewage disposal |
| CN106904740A (en) * | 2017-03-29 | 2017-06-30 | 天津西敦津洋环保科技有限公司 | A kind of sewage disposal device of series connection and application |
| CN105800869B (en) * | 2016-04-18 | 2018-09-25 | 江苏金梓环境科技股份有限公司 | A kind of recirculating fluidized bed family sewage disposal device |
| CN108658232A (en) * | 2017-03-28 | 2018-10-16 | 天津西敦津洋环保科技有限公司 | One kind putting forward target particle strengthening method to existing sewage disposal system dilatation |
| CN113135634A (en) * | 2020-01-17 | 2021-07-20 | 重庆化工职业学院 | C-AnOnSewage treatment process |
| CN113292195A (en) * | 2020-09-25 | 2021-08-24 | 重庆化工职业学院 | AnOnSewage treatment equipment |
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| CN113135634A (en) * | 2020-01-17 | 2021-07-20 | 重庆化工职业学院 | C-AnOnSewage treatment process |
| CN113292195A (en) * | 2020-09-25 | 2021-08-24 | 重庆化工职业学院 | AnOnSewage treatment equipment |
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