CN1453223A - Sewage treating method and apparatus with three-phase biological fluidized bed reactor - Google Patents
Sewage treating method and apparatus with three-phase biological fluidized bed reactor Download PDFInfo
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Abstract
The present invention relates to method and equipment for treating city sewage. Sewage from hotel and restaurant is first pre-treated to eliminate oil and sediment and then treated in a three-phase biological fluidized bed reactor through biochemical oxidation reaction. The reactor includes reaction region, carrier separating and stripping region and liquid-solid separating region, the reaction region includes outer tube, inner guide tube, controlling and catching duct and waste and air distributor; the carrier separating and stripping region includes enlarging duct and guide baffle; and the liquid-solid separating region includes guide board and water outlet distributor. The present invention has comprehensive sewage treating efficiency, small equipment volume, easily controlled process, simple operation and low running cost.
Description
Technical field
The present invention relates to environmental protection technical field, particularly the method and apparatus of city domestic sewage processing.
Background technology
Along with the continuous development and progress of human society, urban population rolls up, and the discharging of Urban water supply and sanitary sewage and processing also more and more are subjected to people's attention, and particularly in many big cities, sewage disposal has become the difficult point in the urban development.In urban sewage discharge, except family, washing chamber in the hotel, outside the excrement and urine waste and plant effluent that discharge in sewage that discharge in bathroom etc. and lavatory, the catering trade sewage in addition that discharge capacity is bigger, these sewage contain rotten vegetables, meat, ight soil, washing composition, starch, fat, animals and plants oil, sugar, salt and various seasoning matter, protein, what have also forms a large amount of colloidal particles and suspended substance, according to relevant department's statistics, it is sanitary sewage that 1/3-1/2 is arranged in the total sewage in city, and increase with the progressive increase rate of annual 5%-6%, by 2002, National urban sewage emissions amount will reach 20,000,000,000 t/a, if to the untimely processing of these sewage, after being discharged into rivers,lakes and seas, on the one hand because degraded takes place and a large amount of oxygen consumption in organism, cause the water body corruption smelly, the fishes and shrimps disappearance, on the other hand, contain N in the sanitary sewage, the P material enters the abnormality proliferation that will stimulate some algae behind the water body, the eutrophication that causes water body, reduce the utility value of water body, cause influence, big lake, many great rivers such as Haihe River to environment, Taihu Lake, Huangpu River, water quality monitoring (WQM) results such as the Zhujiang River can illustrate this point.
The early time treatment of municipal effluent is to collect by sewage collection system to be discharged near downstream water body, makes its dilution and natural purification through water body become dirty into clear, becomes our recycled resource.But increasing along with urban society's scale of economic development, the sewage of discharging is more and more, and water quality becomes increasingly complex, and water body limited natural detergent power can't bear the heavy burden of waste water control!
Along with Chinese society and rapid development of economy, environmental problem becomes increasingly conspicuous, and the especially deterioration of Urban Water Environment has aggravated the shortage of water resources, affects the people's physical and mental health, and this has become the serious restraining factors of urban sustainable development.In recent years. country and local government pay much attention to the sewage disposal cause, are just advancing the construction of city sewage treatment works with unprecedented speed, hundreds of sewage works are arranged just in engineering design and building.Expect 2010, China wants newly-built municipal sewage plant one over thousands of seat, and the investment of Sewage Plant will reach 1,800 hundred million yuan.In this process, the selection of urban sewage treatment process will be the matter of utmost importance that engineering interface faces.
In order to handle municipal effluent well, people have taked many measures in recent years, the open source literature report, main both at home and abroad at present physico-chemical process and the biological process treatment technology of adopting, wherein physico-chemical process is 19 th century later, the flocculation sediment technology that state such as English, U.S. once extensively adopted: worldwide energy scarcity and price raise up, the appearance of new and effective flocculation agent, physico-chemical process is handled the sanitary sewage technology and is developed to some extent, its characteristics are: (1) is without aeration, power consumption is low, and (2) organic pollutant removal is more stable, and higher to the processing rate of phosphorus, heavy metal, bacterium and virus; (3) initial cost and long journey expense are low, under the prerequisite of cutting down big pollution load, can obtain returns of investment preferably.Biological process is divided into traditional activated sludge process and A/O, A again
2/ O method.Traditional activated sludge process is a sewage disposal technology the earliest, the organic removal rate height, and energy consumption and long journey expense are low: the practical engineering of active sludge starts from 1917, A/O, A
2/ O method is the modified version of traditional activated sludge process, adopts anaerobic-aerobic or anoxic-aerobic and anaerobism-anoxic-aerobic process respectively.In recent years, extensively adopt the A/O system both at home and abroad, improved effluent quality and N, P clearance and saved the energy.The Ya Likesai sewage work of the U.S. was built in 1974, and original design employing postpones aerating activated sludge process, after copy the A/O method, make and take off N and lead from 43% and bring up to 72%, removes P and lead by O and bring up to 40%, and energy consumption only is original 72%.
In recent years, on the method for Treating Municipal Sewage, some progress have been arranged again, as, 1, the High-gradient Magnetic isolation technique disposes of sewage.Its principle is, owing to contain various impurity in the sewage, for being of a size of micron-sized magnetic pollutent, directly separate with magnetic separator, the pollutent below micron for non-magnetic substance and size, add agent of magnetic kind and flocculation agent earlier, pollutent copolymerization precipitation is combined, separate with high magnetic separator then.It has wide accommodation, processing efficiency height, treatment capacity is big, processing speed is fast, floor space is few, energy consumption is low, convenient operation and management, level of automation advantages of higher.This kind technology can be used for outside the processing of steel wastewater and heavy metal wastewater thereby, can also handle some organic waste water, contain viral sewage and sanitary sewage.Although this technology just begins one's study the seventies, very big progress has been obtained as U.S., day, Europe etc. in some countries and regions.Though domesticly start late in this respect, tempo is very fast, if any the city once adopted this technical finesse river, it is reached or near water quality standard for drinking water.2, ionizing rays technology is in Application of Sewage, and the traditional trade effluent and the treatment process of sanitary sewage have physico-chemical processes, biochemical process etc.They have run into difficulty when handling some system (as contain not tractable materials of traditional method such as deleterious material of microorganism and physical chemistry, as soil ulmin etc.).Using ionizing rays technical finesse black water mainly is pollution substance radiolysis, polymerization, oxidative deformation and the sterilization that makes wherein.It has does not introduce pollutent, processing efficiency advantages of higher in treating processes.But owing to handle large-scale waste water, need very big source of radiation and very high running cost, so a few years ago, be difficult to be accepted by people.After the seventies, USSR (Union of Soviet Socialist Republics) has been done a large amount of work in this respect.They adopt method that radiation and charcoal absorption combine as the tertiary treatment means, obtain gratifying effect.The U.S. has also set up larger municipal sewage now, and it is to adopt radiotreatment after biological treatment.Operation result shows that various indexs all have greatly improved.China yet there are no the report of this respect.3, liquid Membrane Separation Technique is in Application of Sewage, and liquid film technology makes separation science reach new level as a kind of chemistry, chemical separation technology of novelty.With the method for general processing trade effluent relatively, liquid-film method possess skills advanced person and comparatively economic advantage.Its treatment facility and technical process are all fairly simple, particularly those ordinary methods are difficult to isolating hydrocarbon compound, and treatment effect is better.It is a kind of novel process that gets a good chance of.Because liquid Membrane Separation Technique is a kind of novel membrane separation technique, it has some characteristics of membrane separation technique, and is few as energy consumption, need not heat and technology simple etc.Not as solid film, need high top pressure operation and have film aged problem again, also do not have the problem of support, cleaning, maintenance and the lifetime limit of film.The height of the seepage velocity of liquid film is that solid film can't be compared.Compare with biological process, the concentration of liquid-film method Phenol-Containing Wastewater Treatment can improve, and especially those ordinary methods is difficult to isolating hydrocarbon mixture, and the effect of this method is just better.4, three-phase biologic fluidized-bed process for treating sewage, method that biological fluidized bed is disposed of sewage and device are since early seventies produces, and, economic dispatch advantage efficient, energy-conservation with it have caused the very big interest of engineering circle.Its technology is to fill the less biomone of a certain amount of particle diameter (generally having only 0.2mm-2.0mm) in fluidized-bed.When waste water from bottom to top (or from top to bottom) make bed expansion and reach fluidisation when flowing through carrier, thereby avoided causing the bed phenomenon of blocking because of biomembranous excessively thickening in the technologies such as fixed bed; Because of having very big specific surface area, it (can reach 2000m again
2/ m
3-3000m
2/ m
3) than biomembrance process (80m such as fixed beds
2/ m
3-300m
2/ m
3) high several times to tens times, make the sludge concentration that has in the fluidized-bed much larger than general biological treatment.Biomone is in continuous blended fluidized state, thereby has strengthened gas, solid, liquid three-phase mass transfer process.Above-mentioned various advantages make biological fluidized bed as the technology that has a development prospect all kinds of sewage two, use gradually in the tertiary treatment.As " Chinese water supply and drainage " .1999,15 (6) " microbial film thickness researchs in three-phase biologic fluidized-bed ", by plant-scale three-phase biologic fluidized-bed test, inquired into the positive connection between carrier surface microbial film thickness and the traditional parameters such as organic matter removal speed, volumetric loading and sludge concentration, confirmed that microbial film thickness is the key parameter of describing the reactor behavior, the essence that has disclosed three-phase biologic fluidized-bed high treatment efficiency is the microorganism concn height, and to obtain optimum film thickness be 90-110 μ m." environmental science " 1995,16 (2) " theoretical analysises of inner loop fluidized bed reactor reactor ", from reactor theory, microbial film kinetics and hydraulic angle fluidised form, microbial film degradation of organic substances and the startup film formation property of internal-circulation type three-phase biological fluidized bed reactor are analyzed, think D/ud=const in inside circulation triphase fluidized bed, obtained efficiency factor for general urban sewage treatment system, set up the relation of internal recycle speed and reactor size, proposed further to improve the optimization approach of reactor for treatment efficient simultaneously." urban environment and urban ecology " .1991,4 (4) " organic mixing of three-phase biologic fluidized-bed removal and transmittance process analyses " have also proposed to handle organism sewage with biological fluidized bed; Chinese patent also discloses a kind of three-phase biologic fluidized-bed water treatment method (application number: 01105329.1, title: three-phase biologic fluidized-bed water technology of outer circulation and equipment, the applicant, Shanghai University etc.), the three-phase biologic fluidized-bed waste fitment of this outer circulation comprises: a main bed, main bed bottom is the import of water inlet with air inlet, be characterized in: main bed one side is provided with a secondary bed, the major-minor bed is provided with communicating pipe and lower communicating tube up and down respectively, secondary bed top is provided with water exit end, and its method of design characteristics are: realize that the parameter that the outer circulation three-phase fluidized bed need be selected is: aeration rate and gas-water ratio in the main bed; Major-minor bed diameter ratio; The selection of carrier and filling ratio; And major and minor bed aspect ratio; The bubble that solves the Internal Circulating Fluidized Bed existence thus improves waste water treatment efficiency to liquid, solid isolating influence thereby accelerate speed of circulation.
But, to the exploitation of organism fluidization bed technique.How relatively the research emphasis of its process characteristic the bed body structure, in the improvement of processing condition such as carrier selection and oxygen supply mode thereof, and for fluidisation and the mixing mechanism of biological fluidized bed in handling the organic waste water process, and, still lack more deep research and careful discussion to the absorption oxidizing process of pollutent.
Technology contents
The inventor is through research and explore, and on the basis of understanding existing organism fluidization bed technique in depth, this technology is used for the processing of sanitary wastewater, has obtained effect preferably.Technical scheme of the present invention is as follows:
Sanitary sewage is carried out pre-treatment earlier, enter three-phase biological fluidized bed reactor again with biochemical reaction, demoulding and isolation integral, allow sewage in reactor, stay for some time and carry out oxidizing reaction, then slightly through second-stage treatment, handle as sedimentation, obtain meeting the clear water (reaching the sewage discharge primary standard of GB8978-1996 regulation) of emission request.
Above-described sewage pre-treatment is with screen filtration or just precipitates oil removal with settling tank and handle every slag, allows solid particulate filter out earlier, enters three-phase biological fluidized bed reactor again.
Three-phase biological fluidized bed reactor comprises that reaction zone, carrier separate and stripping region liquid-solid separating region.Reaction zone comprises urceolus, inner draft tube, the control conduit that dams, waste water, air-distributor; Carrier separates and stripping region comprises expansion conduit and flow apron; Liquid-solid separating region comprises flow deflector and water outlet distributor.Control is dammed catheter cartridge in the centre of inner draft tube and urceolus, and reaction zone all is equipped with bio-carrier.Reactor lower part is equipped with air-distributor, and air-distributor is connected with air compressor; The influent waste water sparger is equipped with in the inner draft tube bottom, and is connected with header tank or water pump, and reactor outlet connects overflow groove 12.
Above-described three-phase biological fluidized bed reactor, its conduit that dams is the 50%-80% of inner draft tube length.
Above-described three-phase biological fluidized bed reactor, its reactor certain altitude is interval with the monitoring thief hole.
Above-described bio-carrier can be selected in quartz sand, glass sphere, haydite, rubble, activated carbon or organic micropore ball etc. have hydroaropic substance than bigger serface, also can select their mixture for use.
After enough bio-carriers are housed in reaction zone, need carry out biofilm, the method of biofilm is to flow 3-20 days with the sanitary sewage that needs to handle internal recycle under 5-35 ℃ temperature earlier, and add certain activator, and microorganism is grown on carrier, be covered with the surface of bio-carrier, these microorganisms can be observed a large amount of thalline and campanularian, ciliate, wheel animalcule etc. at microscopically, if temperature is lower, can suitably improve water temperature, make microorganism growth rapid.
The principle of work of three-phase biological fluidized bed reactor of the present invention is: sanitary sewage enters the bottom of thrust-augmenting nozzle in the three-phase biological fluidized bed reactor, the air thorough mixing that enters with the bottom, after obtaining competent oxygen, up flow from inner draft tube, under standard state, the bio-carrier that biofilm is good in the three-phase biological fluidized bed reactor is fluidization under the castering action of current and air-flow, waste water, bio-carrier acutely mix with air, organism in the waste water is contacted with organism on the carrier, and reaction is able to biochemical degradation.Because thrust-augmenting nozzle in the mounting center in the reactor, the demoulding carrier disengaging zone that material rises to reactor in the three-phase biological fluidized bed reactor in the centre pipe pipe is carried out carrier and is separated and demoulding.The waste water that has a small amount of mycoderm enters liquid-solid separating region and carries out liquid-solid separation, and clarifying waste water is discharged from the water outlet distributor overflow.Isolating bio-carrier returns from urceolus, and enters the bottom of tower through the conduit that dams.Because in the three-phase fluidized bed centre pipe reaction zone, the mixing of gas, water and bio-carrier make progress thrust and with the density difference of urceolus waste water, form under urceolus and the conduit current direction that dams, the internal recycle circuit system on the interior thrust-augmenting nozzle current direction, the effect by the conduit that dams reduces the air-teturning mixed phenomenon in the reactor.Gas, water and bio-carrier form comparatively strict inside circulation in reactor, thereby have accelerated contacting between microorganism and the waste water widely, can control biomembranous thickness effectively again simultaneously, and biological process is carried out with fast speeds.
The present invention compared with the prior art, its outstanding substantive distinguishing features and obvious improvement is:
1, this project development is that the technology and the equipment of core processing sanitary sewage is successful with the three-phase biological fluidized bed reactor, and the amplification of process and equipment has reached needs of expected design.
2, the three-phase biologic fluidized-bed reaction unit with reaction, demoulding and bio-carrier isolation integral of this project development, reaction efficiency height, organic volumetric loading height, strong shock resistance.Under selected processing condition and operational condition, CODcr is at 350-1350mg/L in water inlet, and BOD5 is at 210-490mg/L, and the effluent quality of appliance arrangement is all more stable, and water outlet after treatment can meet or exceed the sewage discharge primary standard of GB8978-1996 regulation.
3, this cover technology is compared with traditional biological process with the food and drink waste water treatment process of having reported with device, comprehensive treating process efficient height, and equipment volume is than the big minimizing of traditional biochemical process.Realized the equipment configuration miniaturization.
4, this cover process unit process is easy to control, and is easy and simple to handle, is easy to safeguard that working cost is low.
Description of drawings
Describe the technology of the invention and the enforcement structure of equipment in detail below in conjunction with accompanying drawing:
Fig. 1 is that three-phase biological fluidized bed reactor of the present invention is handled waster water process and apparatus sketch.
As shown in the figure, the three-phase biological fluidized bed reactor reaction zone is by outer simplified 9, and dam conduit 8 and inner draft tube 7 form, And the conduit 8 that dams is the 50%-80% of inner draft tube 7 length, and bio-carrier is equipped with in reaction zone inside, reactor bottom Be provided with air sparger 11, inlet distribution device 10 is equipped with in interior mozzle bottom. Carrier separation and stripping region 5 comprise enlarging to be led Pipe and flow apron, liquid-solid separating region 4 comprises deflector and water outlet distributor. Air sparger 11 and air compressor 2 Connect, influent waste water distributor 10 is equipped with in the inner draft tube bottom, and is connected with head tank 1 or water pump. Reactor outlet connects excessive Chute 12. The reactor certain altitude is interval with monitoring thief hole 6, and three-phase bio-reactor is the core of whole technical process. Water pump is extracted pretreated sanitary sewage out enter three-phase biological fluidized bed reactor bottom from sedimentation basin, perhaps be extracted into earlier Head tank 1 after flowmeter 3 metering, enters reactor through inlet distribution device 10 again, and by the bottom air distributor 11 air that enter fully mix, and the load that drives in the reactor has the carrier of biomass up to flow also from inner draft tube 7 Be fluidization, simultaneously oxygenation of thalline. Selected bio-carrier has bigger surface area in the reactor, its outer surface and interior table Face can well be grown for microorganism. Material in three-phase biologic fluidized-bed rises simultaneously and loads on the carrier table along inner draft tube 7 The thalline of face carries out oxidation reaction, removes the major pollutants in the waste water. When the carrier that rises to reactor top separates and takes off During film district 5, the effect that utilizes the water conservancy diversion gear to pull, the flow regime that changes fluid realizes removing of aging thalline, is enlarging simultaneously In the pipe, circulation area increases, and rate of flow of fluid reduces, and the realization carrier separates with fluid. Waste water with a small amount of thalline enters Liquid-solid separating region 4 utilizes the flow principles of fluid to realize liquid-solid separation, the water of clarification through water outlet distributor from reactor head Discharge through overflow launder 12. The bio-carrier that separates at demoulding, carrier Disengagement zone 5 is from 7 of urceolus 9 and interior mozzles, and Return the bottom of tower through the conduit 8 that dams. Since mozzle reaction zone in the three phase fluidized bed, the mixing of gas, water and bio-carrier Upwards thrust and with the density contrast of urceolus waste water, form under urceolus and conduit 8 current directions that dam, interior mozzle 7 current directions On interior closed circuit system, the effect by the conduit 8 that dams reduces the air-teturning mixed phenomenon in the reactor, forms in the reactor Follow stream in strict. Thereby accelerated widely contacting between microorganism and the waste water, can effectively control life again simultaneously The thickness of thing film and biomembranous activity make biochemical process carry out with speed faster.
Embodiment
The laboratory lab scale
Design a three-phase biological fluidized bed reactor, reaction zone comprises urceolus 9, inner draft tube 7, the conduit 8 that dams, carrier separate and stripping region 5, air-distributor 11, fill a certain amount of bio-carrier at reaction zone, they are mixtures of haydite, rubble, activated carbon, earlier the water internal recycle with the restaurant, Nanning City flowed 3-10 days under 20-30 ℃ temperature, and it is biomembranous when reaching certain thickness that it is produced, and handles food and drink waste water again.Under the selected experiment condition of lab scale, carried out test of many times, and moved 10 days continuously, as a result good reproducibility.The CODcr average removal rate is up to 91.6%.The BOD5 average removal rate is up to 94.86%.After the fluidized-bed water outlet carried out coagulant precipitation or filtration treatment, can utilize the organism of generation to quicken sedimentation simultaneously, the waste water after the processing, wherein CODcr is less than 100mg/L, BOD
5Be about 25mg/L, the principal pollutant index reaches GB8978-1996 sewage first discharge standard.
For selected food and drink waste water sample, handle with the fluidized-bed reactor of design, CODcr is 600～1500mg/L in water inlet, and air demand is 35L/h, and the reactor region hydraulic detention time is 60min, moves 10 days continuously, and move 12 hours every day continuously.Handle experimental result and see Table 1.
Table 1 moves CODcr continuously and removes experimental result
First day influent COD cr/ (mg/L) 1,110 676 1,127 768 1,506 1,112 870 859 970 1098 water outlet CODcr/ (mg/L) 88 87 85 72 94 76 75 80 82 78CODcr removal in per two days per three days the 4th day the 5th day the 6th day the 7th day the 8th day the 9th day the tenth day/(%) 92.1 87.1 92.5 90.6 93.8 93.2 91.4 90.7 91.5 92.9 get first day, the 5th day, the tenth day water sample is surveyed BOD5Clearance, experimental result sees Table 2.
Table 2 is operation BOD continuously
5Remove experimental result
The 95.3 95.0 94.3BOD volumetric loading/kg/m of first day the 5th day the tenth day water inlet BOD/ (mg/L) 422 621 416 water outlet BOD/ (mg/L) 20 31 23BOD clearance/(%)
3.d 9.62 14.16 9.43
From continuous operation result as can be known, under selected lab scale processing condition, technology newly developed is to main CODcr, the BOD of polluting in the selected food and beverage enterprise waste discharge
5Clearance higher, organic volumetric loading is high, technological process is comparatively stable, to the water inlet CODcr, BOD
5When changing greatly, can reach treatment effect preferably equally, the capacity of resisting impact load of illustrative system is stronger.
(1) to three tame typical food and beverage enterprise waste water signature analysises, wherein organic content is higher, BOD
5/ CODcr value belongs to biodegradability waste water preferably between 0.36-0.56, bioprocess does not need to add nutrition in addition, and waste water is slightly acidic.
(2) different carrier carrier surface forming biofilm property difference, the activity of biofilm artifact film also has notable difference.
(3) three-phase biologic fluidized-bed processing food and drink waste water need not be introduced directly biofilm of seed sludge when biological bed starts operation, and is easy to operate, is easy to management.By gas, the moving speed of liquid two-phase in the controlling reactor, make an interior carrier fluidisation, upgrade microbial film by the automatic demoulding of hydraulic action, keep microbial film to have high reaction activity and high.
(4) for selected food and drink waste water water sample, CODcr is 600～1500mg/L in water inlet, and air demand is 35L/h, and hydraulic detention time is 60min, and the CODcr average removal rate is up to more than 91.6%, and organic volumetric loading is big.Have stronger capacity of resisting impact load, treatment effect is more stable.The fluidized-bed reactor water outlet reaches the sewage first discharge standard of GB8978-1996 regulation.
(5) owing to adopt reactor, demoulding, carrier tripping device integrated, have a spot of suspended substance in the fluidizer water outlet, and settling velocity is slower, need quickens sedimentation and handle.
(6) in the three-phase biological fluidized bed reactor owing to relate to the transmission and the biochemical reaction process of three phases, the influence factor complexity.
Embodiment two
Type approval test research
On the working foundation of lab scale, type approval test of the present invention adopts similar technical process, its equipment three-phase biological fluidized bed reactor reaction zone is made up of cylindrical shell 9, inner draft tube 7 and the conduit 8 that dams, and bio-carrier is equipped with in inside, and expansion district in middle part is that carrier separates and stripping region 5.Reactor bottom is provided with air-distributor 11, influent waste water sparger 10, and air-distributor 9 and air compressor 2, influent waste water sparger 10 is connected with a pump, and the reactor certain altitude is interval with monitoring and thief hole 6.The processing parameter and the operating parameters that obtain with lab scale are foundation, and having designed a cover treatment capacity is 1m
3/ h-2m
3The type approval test device of/h.Determine that waste water normal hydraulic detention time of conversion zone in reactor is 60min, the operation gas-liquid volume ratio is adjustable between 3: 1～8: 1.In order to strengthen biochemical reaction process, be designed to internal circulation fluidized bed reactor, reaction, demoulding, carrier tripping device are integrally combined.In order to guarantee that the bio-carrier fluidisation is in good condition in the reactor, can satisfy the requirement of biochemical reaction process again simultaneously to oxygen-supplying amount, select suitable aspect ratio, reaction zone inner/outer tube diameter ratio.Design flow fluidized bed reactor reaction zone virtual height is 4-8m, the about 1-1.5m of reaction zone volume
3Carrier separates and stripping region, and the bio-carrier behind the demoulding separates with the gas, liquid of rising in the disengaging zone, and the fall stream district outer by thrust-augmenting nozzle in the reactor is recycled to reactor bottom by the conduit that dams.Consider demoulding and carrier separation requirement, effective volume is 0.2-0.5m
3The mutual collision friction of carrier in reactor, its surface is gone up old microbial film and is constantly come off, and new microbial film is constantly grown.The microbial film that comes off forms a sludge blanket gradually in the disengaging zone, can play the biomembranous effect that absorption and interception newly come off, thereby reduce the suspended substance in the water outlet.The design of disengaging zone considers that the particulate requirement of carrying secretly by entrap gas designs, diameter with the height ratio be 1: 1-1: 2, be divided into three districts in the disengaging zone: the outgas district, hold back the district and exhalant region.Type approval test process and main equipment have amplified about 120 times than lab scale.
Processing condition
The type approval test scene is in restaurant, Nanning city, the sewage of this restaurant discharging through simple oil removal, water after the slag processing as the water inlet of this cover testing apparatus.
Waste water: the waste water of restaurant, Nanning City discharging
Influent waste water amount: 1.0-2.0m
3/ h, air input: 1.6-8.2m
3/ h, temperature: normal temperature
Hydraulic detention time: 35-120min under the condition of above-mentioned selected processing parameter and operating parameters, to installing 3 days data test of continuous operation, the results are shown in Table 3
Table 3 test-results
CODcr mg/L BOD
5Mg/L water inlet 350-1350 1025 (on average) 210-490 379 (on average) water outlet 35-86 69.7 (on average) 18-20 19 (on average) clearance % 90-93.6 91.8 (on average) 91.4-95.9 93.7 (on average)
On-site sampling through the specified environment protection measuring station of country detects, and water inlet principal pollutant index is CODcr-800mg/L, BOD
5-458mgg/L, SS-281mg/L, NH
3-N-7.73mg/L, after the processing of this cover process unit, the discharge index of final outflow water principal pollutant is: COD-80mg/L, BOD-17mg/L, SS-42mg/L, NH
3-N3.26mg/L meets the requirement of GB8978-1996 sewage first grade discharging.System is stable, and has stronger capacity of resisting impact load, and this technology and device reach the expected design requirement fully.
Running cost: it is 1.1m that runtime system is handled the water yield
3/ h calculates by the required cost of 1 ton of water of every processing, and the running cost of native system is 0.36-0.48 unit/ton.
Embodiment three
With the composite wastewater that discharge in the device processes hotel of embodiment 2, processing power is 1m
3/ h according to the processing condition that lab scale obtains, determines that waste water normal hydraulic detention time of reaction zone in reactor is 45-100min, and water temperature is 25-32 ℃, and the operation gas-liquid volume ratio is between 2: 1～9: 1.Operation is 3 months continuously, and operation result is as shown in table 5:
Table 5 operation result
CODcr mg/L BOD
5Mg/L water inlet 450-960 745 (on average) 240-360 315 (on average) water outlet 50-76 63 (on average) 15-20 17.5 (on average) clearance % 90.7-92.4 91.6 (on average) 91.2-93.3 92.3 (on average)
From continuous operation result as can be known, treatment effect is stable.On-site sampling through the specified environment protection measuring station of country detects, and water inlet principal pollutant index is CODcr-730mg/L, BOD
5-315mg/L, SS-195mg/L, NH
3-N-6.84mg/L, after the processing of this cover process unit, the discharge index of final outflow water principal pollutant is: COD-77mg/L, BOD-19mg/L, SS-35mg/L, NH
3-N3.06mg/L meets the requirement of GB8978-1996 sewage first grade discharging.
Embodiment four
With the sanitary sewage that the device processes university of embodiment 2 discharges, processing power is 1.2m
3/ h, normal temperature is handled.According to the processing condition that lab scale obtains, determine that the normal hydraulic detention time of waste water in reactor is 60min, the operation gas-liquid volume ratio is between 3: 1～12: 1.Operation is 5 months continuously, and concrete outcome is as shown in table 6:
Table 6 operation result
CODcr mg/L BOD
5Mg/L water inlet 420-1150 835 (on average) 243-485 354 (on average) water outlet 48-80 65.7 (on average) 10-21 15.5 (on average) clearance % 89.8-93.0 91.4 (on average) 95.1-95.7 95.4 (on average)
From continuous operation result as can be known, under selected processing condition, technological process is comparatively stable.On-site sampling through city's environment protection measuring station detects, and water inlet principal pollutant index is CODcr-690mg/L, BOD
5-405mg/L, SS-340mg/L, NH
3-N-7.52mg/L, after the processing of this cover process unit, the discharge index of final outflow water principal pollutant is: COD-76mg/L, BOD-20mg/L, SS-39mg/L, NH
3-N 2.15mg/L meets the requirement of GB8978-1996 sewage first grade discharging.
Claims (7)
1, a kind of three-phase biological fluidized bed reactor method of disposing of sewage, it is characterized in that: sanitary sewage is carried out pre-treatment earlier, enter three-phase biological fluidized bed reactor again with biochemical reaction, demoulding and isolation integral, allow sewage in reactor, stay for some time and carry out oxidizing reaction, obtain meeting the clear water of emission request.
2, the three-phase biological fluidized bed reactor according to claim 1 method of disposing of sewage is characterized in that: described sewage pre-treatment is with screen filtration or just precipitates oil removal with settling tank and handle every slag.
3, the three-phase biological fluidized bed reactor according to claim 1 method of disposing of sewage, it is characterized in that: before disposing of sewage at first with bio-carrier biofilm in reactor, the method of biofilm is to flow 3-20 days at the reactor internal recycle under 5-35 ℃ temperature with the sanitary sewage that needs to handle earlier, microorganism is grown on carrier, all be covered with the surface of bio-carrier.
4, a kind of with biochemical reaction, the equipment that the three-phase biological fluidized bed reactor of demoulding and isolation integral is disposed of sewage, it is characterized in that: it comprises urceolus (9), inner draft tube (7), the reaction zone that the conduit (8) that dams constitutes, the middle part carrier separates and stripping region (5) comprises expansion conduit and flow apron, the top is that liquid-solid separating region (4) comprises flow deflector and water outlet distributor, air-distributor (11) is connected with air compressor (2), influent waste water sparger (10) is equipped with in the inner draft tube bottom, and be connected with header tank (1) or water pump, reactor outlet connects overflow groove 12.
5, the three-phase biological fluidized bed reactor according to claim 4 equipment of disposing of sewage, it is characterized in that: bio-carrier can be selected in hydrophilic materials such as quartz sand, glass sphere, haydite, rubble, activated carbon or organic micropore ball, perhaps selects their mixture for use.
6, the three-phase biological fluidized bed reactor according to claim 4 equipment of disposing of sewage is characterized in that: the reactor certain altitude is interval with monitoring thief hole (6).
7, the three-phase biological fluidized bed reactor according to claim 4 equipment of disposing of sewage, it is characterized in that: the conduit that dams (8) is the 50%-80% of inner draft tube (7) length;
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| CNB031280900A CN1219708C (en) | 2003-05-30 | 2003-05-30 | Sewage treating method and apparatus with three-phase biological fluidized bed reactor |
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| CN101514051B (en) * | 2009-03-27 | 2010-09-15 | 哈尔滨工业大学 | Self-demoulding biologic-carrier internal circulation filtering technology and a device thereof |
| CN101935116A (en) * | 2010-07-22 | 2011-01-05 | 北京交通大学 | Non-degradable organic wastewater treatment method, photocatalysis reactor and micropore static pipeline mixer |
| CN102267757A (en) * | 2011-06-29 | 2011-12-07 | 无锡强工机械工业有限公司 | Biomass three-phase separator device |
| CN101842323B (en) * | 2007-08-28 | 2012-10-10 | 西安大略大学 | Liquid-solid fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorus removal |
| CN103058460A (en) * | 2013-01-02 | 2013-04-24 | 北京工业大学 | A/O (anoxic/oxic) flow separation and magnetic flocculation integrated sewage treatment device and method |
| CN106746359A (en) * | 2016-12-14 | 2017-05-31 | 苏州润弘贸易有限公司 | The method of multifunctional combined treatment domestic sewage in rural areas |
| CN106830513A (en) * | 2016-12-14 | 2017-06-13 | 苏州润弘贸易有限公司 | The treatment method for rural sewage of better performances |
| CN106865763A (en) * | 2016-12-14 | 2017-06-20 | 苏州润弘贸易有限公司 | Reduce the treatment method for rural sewage that mosquitos and flies grows |
| CN106882874A (en) * | 2016-12-14 | 2017-06-23 | 苏州润弘贸易有限公司 | The method that joint artificial swamp and ecological pond process country sewage |
| 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 |
| CN113045121A (en) * | 2021-03-17 | 2021-06-29 | 联合滤洁过滤技术(武汉)有限公司 | Adsorption degradation regeneration fluidized bed |
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| CN101842323B (en) * | 2007-08-28 | 2012-10-10 | 西安大略大学 | Liquid-solid fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorus removal |
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| CN101935116A (en) * | 2010-07-22 | 2011-01-05 | 北京交通大学 | Non-degradable organic wastewater treatment method, photocatalysis reactor and micropore static pipeline mixer |
| CN101935116B (en) * | 2010-07-22 | 2011-11-09 | 北京交通大学 | Non-degradable organic wastewater treatment method, photocatalysis reactor and micropore static pipeline mixer |
| CN102267757A (en) * | 2011-06-29 | 2011-12-07 | 无锡强工机械工业有限公司 | Biomass three-phase separator device |
| CN102267757B (en) * | 2011-06-29 | 2013-02-13 | 无锡强工机械工业有限公司 | Biomass three-phase separator device |
| CN103058460A (en) * | 2013-01-02 | 2013-04-24 | 北京工业大学 | A/O (anoxic/oxic) flow separation and magnetic flocculation integrated sewage treatment device and method |
| CN106746359A (en) * | 2016-12-14 | 2017-05-31 | 苏州润弘贸易有限公司 | The method of multifunctional combined treatment domestic sewage in rural areas |
| CN106830513A (en) * | 2016-12-14 | 2017-06-13 | 苏州润弘贸易有限公司 | The treatment method for rural sewage of better performances |
| CN106865763A (en) * | 2016-12-14 | 2017-06-20 | 苏州润弘贸易有限公司 | Reduce the treatment method for rural sewage that mosquitos and flies grows |
| CN106882874A (en) * | 2016-12-14 | 2017-06-23 | 苏州润弘贸易有限公司 | The method that joint artificial swamp and ecological pond process country sewage |
| 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 |
| CN113045121A (en) * | 2021-03-17 | 2021-06-29 | 联合滤洁过滤技术(武汉)有限公司 | Adsorption degradation regeneration fluidized bed |
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