CN102020397A - Circular attaching-suspending microorganism sewage purification system - Google Patents
Circular attaching-suspending microorganism sewage purification system Download PDFInfo
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- CN102020397A CN102020397A CN2010101190753A CN201010119075A CN102020397A CN 102020397 A CN102020397 A CN 102020397A CN 2010101190753 A CN2010101190753 A CN 2010101190753A CN 201010119075 A CN201010119075 A CN 201010119075A CN 102020397 A CN102020397 A CN 102020397A
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Abstract
The invention relates to a method and a device for sewage biological purification. The device consists of a pretreatment unit, a microorganism growth unit, a circulating unit, a measurement and control unit and an aftertreatment unit, and has a structure shown by an attached drawing. A purification process and a purification mechanism comprise the following steps of: leading sewage to be purified into a primary settling tank in the pretreatment unit; pretreating by a physical method; pumping into a water distributor under the control of the measurement and control unit; spattering into a microorganism growth unit region A by using the water distributor; and discharging to a region B through a pressure water distributor. Under the action of the circulating unit, the sewage repeatedly and circularly flows between the microorganism growth unit region A and the region B, so dissolved oxygen in the sewage is in a state of switching between high concentration and extremely low concentration all the time, and pollutants and microorganisms in the sewage are repeatedly subjected to an aerobic-anaerobic-facultative reaction process to fulfill the aim of purifying the sewage. Compared with the prior art, the system has the advantages of wide application range and good purification effect.
Description
Technical field:
The present invention relates to a kind of method and apparatus of purifying waste water, further relate to a kind of circulation and adhere to-the suspension microorganism sewage purification system with biological method.
Background technology:
The various kind of microorganism, complicated nutrient type, the variability and the adaptability of metabolic capacity and height greatly make it utilizing all contaminations, removing and show great potential aspect objectionable impurities even the changing waste into resources.Utilize microorganism that the degradation capability of pollutent is purified waste water widely and use, compare with physics and chemical method, its less investment, cost is low, technology is simple, environmental friendliness, and thoroughly degradation of contaminant does not produce secondary pollution again.In secular engineering practice, people have developed kinds of processes with regard to activated sludge process (Activated Sludge Process), and the microorganism in the activated sludge process is along with active sludge suspension growth in sewage.After this, people have also developed biomembrance process (BiomembranceProcess) and have purified waste water, and microorganism is attached to growing on the fixation support in the biomembrance process.
In the various technologies of activated sludge process, all adopt aeration and stir the chemotaxis that the mode of mud is come enhancement microbiological, make pollutent in time degrade; Then the chemotaxis that adopts sewage to come enhancement microbiological by the biomembranous method of growing on the carrier in biomembrance process.Therefore, the recombining process that above two kinds of methods are combined has better decontamination effect improving than single method treatment process.Patent document 200610054496.6 discloses a kind of active sludge-biomembrane compounding integral sewage treating method and device, at first treatment sewage is introduced the oxygen-starved area, does not stop to stir so that treatment sewage and active sludge thorough mixing; Then the sewage after the above-mentioned processing is introduced Packed aeration zone is set, the active sludge of microbial suspension growth and the microbial film of fixed growth are combined, by continuous aeration or intermittent aeration the sewage that enters the aeration zone is carried out aeration and handle; Sewage after will handling is at last introduced the settling region, and natural sedimentation realizes mud-water separation, and the water purification that post precipitation forms is drawn from top, settling region, and the mud mixed liquid that post precipitation forms is back to the oxygen-starved area, and excess sludge is directly discharged.The sewage disposal of samll cities and towns during this method and apparatus relatively is fit to.
Patent document 200810196853.1 discloses a kind of active sludge and biological film composite type A
2/ O improved technology, this technology is made up of anaerobism, anoxic, aerobic three segment process, it is characterized in that in aerobic reactor, adding a plurality of cilium shape biologic packing materials, with ultrasonic treatment unit excess sludge in the second pond is carried out cavitation and resolve into liquid deliquescent organism, and this part mud is back to the front end of anoxic reacter.This technology utilization cilium shape biologic packing material has been fixed long nitrifier of a large amount of breeding times generation, has improved nitration reaction speed, has reduced the influence of mud variation in age to nitrifying bacteria community; Utilize ultrasonic treating device to handle excess sludge, the efficient useful matter that excess sludge is comprised obtains utilizing, and has solved A simultaneously
2The insufficient problem of carbon source makes A in the/O technological process
2/ O process system keeps higher denitrogenation dephosphorizing effect simultaneously.This technology is more suitable for the second-stage treatment of municipal effluent.
By analyzing above two described processing methodes of patent document and device, be not difficult to find out that it has following open defect:
1, only use microbial film at aerobic stage, though strengthened nitrification, denitrification still a little less than, therefore, the purification of sewage is had significant limitation;
2, can only carry out second-stage treatment to town sewage, can not purify to qualified discharge industrial sewage with the component complexity;
3, can not carry out advanced treatment to sewage, hinder the sewage recycling utilization after handling;
4, effluent quality instability, this be since in the sewage of introducing the concentration of each pollutant changes, and envrionment conditions (mainly being envrionment temperature) is continuous variation, under identical operational conditions, effluent quality is different.Therefore can occur having discharged under the water quality situation not up to standard.
Summary of the invention:
The objective of the invention is many defectives of existing in existing active sludge-biological film composite type method for remedying, provide a kind of circulation to adhere to-the suspension microorganism sewage purification system.This system is made up of five unit such as pretreatment unit, microorganism growth unit, cycling element, measurement and control unit and post-processing units.
1, pretreatment unit comprises preliminary sedimentation tank, pumping system and water distributor etc.Sewage to be clean is introduced preliminary sedimentation tank, carries out making it to be in comparatively stable status after simple physics and the chemical treatment, enters water distributor through pumping system, and water distributor is the bathtub construction of base plate band mesh.The water distributor structural representation is seen accompanying drawing 1 (a), and the floor panel structure synoptic diagram of band mesh is seen Fig. 1 (b).
2, the microorganism growth unit comprises pond body, pressure water distributor, microbial fixed carrier, active sludge.With partition wall the pond body is separated into two zones of A, B, the pressure water distributor pass partition wall from the A district to B district water distribution, make two regional connectivities.Water distributor is installed in upper end, A district.The A district is disposed in order aerobic microbiological carrier, anaerobion carrier, anaerobic activated sludge by overlooking direction; The B district is disposed in order hold concurrently oxygen animalcule carrier, anaerobion carrier, anaerobic activated sludge by overlooking direction.Sewage in the water distributor drips to spatter and enters the A district, enters the B district through the pressure water distributor again, and its structure of microorganism growth unit as shown in Figure 2.In this unit, occur with biomembranous form, occur with zoogleic form and be suspended in the microorganism that grows in the active sludge attached to the microorganism that grows on the fixation support.This unit design has three key points: 1) microbial fixed carrier does not adopt common fillers, and is to use the surface modification foamed ceramics.The surface modification foamed ceramics be on regular foam pottery specific surface with cold air power spraying and coating technology bonding transition metal oxide powder particle, and do hydrophilic treatment and form.Hydroxyl in the aqueous transition metal oxide can be replaced the formation covalent linkage by the suitable ligand of cell.Cell for prokaryotic organism and fungi, owing to have a large amount of polysaccharide on the cell walls, can be crosslinked by sequestering action and foamed ceramics grain, for protobiont and miniature metazoan, be inlaid with a large amount of protein on the cytoplasmic membrane, amino-acid residue on the proteinic peptide chain can form covalent linkage with the hydroxyl in the aqueous transition metal oxide, and this crosslinked action influences the biological activity of cell hardly.The inner grain specific surface of surface modification foamed ceramic carrier has the aqueous transition metal oxide ion of one deck, the carrying out of chelatropic reaction when being very beneficial for fixation of microbe, thereby make its specific surface carry out immobilization with absorption-crosslinked complex method to microorganism, microbial load is big in the formed microbial film, the microbial film physical strength is big.2) anaerobion fixation support vertical direction upper surface is at the bottom of the pond about 1300mm, and rising pipe is at the bottom of the pond about 1600mm; 3) design mud face height 300-400mm, pressure water distributor 500mm at the bottom of the pond.
3, cycling element comprises circulating water pool and circulation tube pump.The circulating water pool capacity is very little, and storage is used for round-robin water in advance.The last arc top that is used for the round-robin water pipe is opened plurality of holes, so that round-robin sewage absorbs airborne oxygen and increases its dissolved oxygen in pipe.When sewage reaches the control elevation of water surface in microorganism growth unit cells body, promptly stop into water, start recycle pump, water lift enters water distributor from circulating water pool, after entering the A district, because pressure effect, the downward sequential flow of sewage through aerobic biologic membrane, anaerobe film, arrive bottom and anaerobic activated sludge contact reacts; By the pressure water distributor, arrive bottom, B district and contact with anaerobic activated sludge, the anaerobe film of upwards flowing through then, the oxygen microbial film of holding concurrently, and enter circulating pipe inflow circulating water pool once more, the next circulation of beginning.
4, measurement and control unit is by integrated forming such as feature pollutent continuous on line monitor, industrial computer, mud position monitor, Ph meter, under meter, programmer and application software.It has the function of six aspects: 1) control unitary water inlet from the preliminary sedimentation tank to the microorganism growth when water inlet arrives the control water level, stops pumping; 2) start recycle pump then, sewage is circulated repeatedly in microorganism growth unit A, B two districts; 3) the sewage feature Pollutant levels value of monitoring in circulating, and with corresponding target value comparison, when all concentration values that monitor during, stop circulation less than target value; 4) after circulation stopped, the control outlet valve was through the settling tank of rising pipe water outlet to the post-processing unit, and started conveying pump once more send water to water distributor from preliminary sedimentation tank after water outlet finishes, and began next scavenging process; 5) mud position control is to make the mud place value remain on a certain interval, spoil disposal when promptly the mud position arrives a certain height, when the mud potential drop when requiring height, stop spoil disposal; 6) post-processing unit discharging weir notch is carried out water quality monitoring (WQM), remote interface will monitor data and be sent to environmental administration's monitoring data management platform.
The present invention proposes a kind of brand-new effluent purification method and device thereof, its scavenging process and mechanism are as follows: sewage to be clean is introduced preliminary sedimentation tank after after physical method carries out pre-treatment, the measurement and control unit control pump is delivered to water distributor, drip to spatter by water distributor and enter the A district, the aerobic biologic membrane of flowing through at first downwards.The effect of water distributor is the content that increases dissolved oxygen in the sewage, so that effluent stream is when aerobic biologic membrane, comparatively intensive biochemical reaction takes place for pollutants in sewage and aerobic microbiological.Because the aerobic respiration of aerobic microbiological, after effluent stream is crossed aerobic biologic membrane, dissolved oxygen almost all consumes, the anaerobe film of flowing through downwards again, arriving the bottom contacts with anaerobic activated sludge, carry out the anaerobic digestion reaction, entering bottom, B district through the pressure water distributor then contacts with anaerobic activated sludge, and the anaerobe film of upwards flowing through, carry out the anaerobic digestion reaction once more, the upper reaches is by the double oxygen microbial film of upper end, B district then, the oxygen of holding concurrently reaction, enter circulating pipe at last, flow into circulating water pool, send into water distributor by recycle pump again and carry out next one circulation.The last arc end of circulating pipe has plurality of holes, because the mobile effect is dissolved in the sewage airborne oxygen.In circulation constantly, dissolved oxygen repeats the state of high density-extremely low concentration all the time in the sewage, and pollutants in sewage and microorganism are repeated the aerobic-anaerobism-oxygen reaction process of holding concurrently.Measurement and control unit is monitored the concentration of the feature pollutent in the sewage, when monitor value during all less than the standard value set separately, stops circulation, and from the water outlet of microbial biochemical unit to post-processing unit.Microorganism growth unit cells body water level after water outlet is finished remains on about 1.6m, at this moment, the aerobic biologic membrane and the double oxygen microbial film of A, upper end, B two districts are exposed in the atmosphere, microorganism in the microbial film is reoxygenation fully, and the anaerobe film of lower end and anaerobic activated sludge keep and isolated from atmosphere, keep anaerobic state.After water outlet was finished, measurement and control unit control intake pump sent water to water distributor once more from preliminary sedimentation tank, begins next scavenging process.
The present invention has the breakthrough of following two aspects compared with prior art:
1, sewage to be clean can carry out the nitrification and denitrification reaction repeatedly by native system, dephosphorization denitrogenation is complete, also can degrade fully to other pollutent, not only be suitable for the purifying treatment of town sewage, and also suitable fully to the purification of the industrial sewage of various component complexity, and the effluent quality stable state is up to standard;
2, can in measurement and control unit, set feature (target) pollutent scope and the purification that will reach after standard value, sewage is directly carried out advanced treatment.This utilizes significant to sewage recycling.
Embodiment
Above (summary of the invention part) to circulation adhere to-composition, structure, scavenging process and the mechanism of suspension microorganism sewage purification system done clear and definite elaboration.Those skilled in the art can figure out: these clear and definite elaborations are said embodiments of the present invention in fact.Be that example illustrates this point with Hubei phosphatization factory phosphorus-containing wastewater purifying treatment below.
Embodiment
Hubei phosphatization factory phosphorus-containing wastewater is mainly produced by following production process: the 1. phosphorus-containing wastewater that produces of the refinery pit of phosphorus production process, mud phosphorus pond, condensing tower; 2. thermal phosphoric acid is pressed the phosphorus-containing wastewater that the phosphorus operation produces; 3. the phosphoric acid for food filter cloth washs the phosphorus-containing wastewater that produces; 4. the phosphorous water coolant of tripoly phosphate sodium STPP high-pressure pump.The phosphorus-containing wastewater generation is 1050545t/a.Water film dedusting generation wastewater flow rate is 21600t/a in addition, and the sanitary sewage amount is 10200t/a.
The phosphorus-containing wastewater principal pollutant are suspended solid, chemical oxygen demand (COD), total cyanide, sulfide, total phosphorus, total nitrogen, ammonia nitrogen, fluorochemical etc., and principal feature is pH value lower (2-3), and is phosphorous bigger.If water is carried out totally-enclosed circulation, the water quality of water circulation system is constantly worsened, the content of pollutent is constantly accumulated rising, the equipment in giving system causes damage, also can be in atmosphere during furnace slag granulating the inorganization pollutents such as discharging fluorochemical, Vanadium Pentoxide in FLAKES, prussiate that exceed standard.Therefore, phosphorus-containing wastewater will be after purifying treatment be up to standard, ability cyclically utilizing and discharging.
Determine that according to waste water generation and early-stage rainwater amount the construction scale at this factory treatment of Phosphorus Containing Waste Water station is 150m
3/ h.Existing processing method can't the purifying treatment phosphorus-containing wastewater, uses the present invention and then can make qualified discharge and reuse after the phosphorus-containing wastewater purifying treatment, and its significant parameter and adjustment method are as follows:
1, pretreatment unit, building two garden cylindricalitys, volumes is 3600m
3Equalizing tank, build annular water channel along equalizing tank upper end outer wall, dark 200mm, annular bandwidth 200mm installs the ring-type grid of high 100mm on the equalizing tank, equalizing tank 2 is than the low 250mm of equalizing tank 1 level height.Close the annular water channel that phosphorus waste water inserts equalizing tank 1, by the ring-type grid, fall to spatter along pool wall and enter equalizing tank 1, enter the ring-type water channel of transferring pond 2 by pipe connecting then, fall by the ring-type grid once more that to spatter the effect that enters 2, two equalizing tanks of equalizing tank be that water quality and quantity is regulated, the interception suspended substance, temperature is regulated (temperature of regulating waste water is to 30-35 ℃), in equalizing tank 2, add NaHCO
3Regulate ph value to 6～8 of waste water.
Bathtub construction water distributor size 7500 * 7500 * 500mm, base plate mesh aperture 10mm, spacing 15mm.
2, microorganism growth unit cells body size 15000 * 15000 * 6160mm, water inlet pipe 2 connects equalizing tank 2 and water distributor, its size φ 100mm, 30 of pressure water distributors, water distributing pore aperture 15mm on the pressure water distributor.The surface modification foam is made pottery and is built aperture 20mm, porosity 91%, and ultimate compression strength 1.25MPa, rectangular shape is arranged on the steelframe, and lifting enters two zones of A, B.Two area size of A, B that microorganisms producing unit cells body separated with partition wall are identical, anaerobion carrier vertical direction 1300mm at the bottom of the ground, aerobic (oxygen of holding concurrently) microbe carrier is apart from pond body upper end 160mm, rising pipe 7 1600mm at the bottom of the pond, anaerobic activated sludge design height 400mm, pressure water distributor 500mm at the bottom of the pond.
3, circulating water pool size 2000 * 2000 * 2000mm builds according to microorganism growth unit cells body, the level height unanimity, and submersible pump (recycle pump) is installed at the bottom of the pond, circulating pipe size φ 150mm, upper end perforate Confucius footpath 20mm, spacing 10mm.
4, measurement and control unit: on-line monitoring instrument (COD, total cyanide, sulfide, total nitrogen, total phosphorus, ammonia nitrogen, fluorochemical, ph), mud position monitor, data link, industrial computer and integrated software, all monitor probes are installed in the B zone.Feature pollutent standard value is set at by the special emission standard of yellow phosphorus industry pollutent: ph8.0, COD50, total cyanide 0.5, sulfide 1.0, total phosphorus 0.5, total nitrogen 10, ammonia nitrogen 5, fluorochemical 8 (except that the ph value, other unit is mg/L).
5, post-processing unit: settling tank is a underground structure, and size 20000 * 2000 * 4000mm runs in and puts weir notch, and weir notch is installed online monitor probe.
6, control method
(1) anaerobic activated sludge inoculation culture
Get local municipal sewage plant anaerobic activated sludge and put into bottom, two zones of microorganism growth unit cells body A, B, mud position height 320mm, add clear water to 1300mm, add C, N, P (100: 5: 1 in proportion), nutritive substances such as FeCL24H2O, CuCL2, per 3 days once, and beginning in the 12nd day adds 7m every day
3Phosphorus-containing wastewater, water level rises to 1600mm after 10 days, and in thereafter 30 days, add 50m to the pond body every day
3Phosphorus-containing wastewater.
(2) growth of anaerobe film forms
In the process of anaerobic activated sludge inoculation culture, domestication, absorption-crosslinked microorganism grows gradually, breeds on the surface modification foamed ceramic carrier in two zones of A, B, forms comparatively sophisticated microbial film.
(3) aerobic (oxygen of holding concurrently) biomembranous growth forms
At first utilize local municipal sewage plant aerobic activated sludge inoculation culture to go out the aerobic degradation bacterium, tame cultivation with phosphorus-containing wastewater again, and amplification culture obtains the bacterium liquid that this project is used.The 1st day to the 22nd day of anaerobic activated sludge inoculation culture, spray phosphorus-containing wastewater with atomizer to aerobic (oxygen of holding concurrently) microbe carrier every day, one day 3 times, keep carrier moistening, allow pollutent in the carrier specific surface absorption phosphorus-containing wastewater, spray bacterium liquid, twice of every day to aerobic (oxygen of holding concurrently) microbe carrier since the 23rd day with spraying, continuous 10 days, spray phosphorus-containing wastewater and nutraceutical mixed solution (concentration ratio of waste water progressively increases) after this 20 day every day.The anaerobic activated sludge inoculation culture finish substantially form with anaerobe film growth in, the formation of also growing of aerobic (oxygen of holding concurrently) microbial film.
(4) trial run
The formal measurement and control unit that starts, try a wheat harvesting period out after, system purification speed and effluent quality all reach this phosphatization factory carries out purifying treatment to phosphorus-containing wastewater requirement.
Description of drawings:
Fig. 1: water distributor structural representation
1, Fig. 1 (a) water distributor bathtub construction
2, Fig. 1 (b) base plate mesh
Fig. 2: suspension microorganism sewage purification system structural representation
1, measurement and control unit
2, water inlet pipe
3, water distributor
4, surface modification foamed ceramic carrier
5, shore pipe
6, water distributing pore
7, rising pipe
8, water outlet is to circulating water pool
9, circulatory pool water inlet pipe
10, water circulating pump
11, active sludge
Fig. 3: suspension microorganism sewage purification system process flow sheet.
Claims (6)
1. circulation is adhered to-the suspension microorganism sewage purification system, is made up of pretreatment unit, microorganism growth unit, cycling element, measurement and control unit and post-processing unit.
2. 1 described circulation is adhered to-the suspension microorganism sewage purification system according to claim, it is characterized in that the microorganism growth unit is separated into two zones of A, B with partition wall, and is communicated with by the pressure water distributor under the partition wall.
3. according to claim 2 described microorganism growth unit, it is characterized in that overlooking in the A district direction and be disposed in order aerobic biologic membrane, anaerobe film and anaerobic activated sludge, overlook direction in the B district and be disposed in order hold concurrently oxygen microbial film, anaerobe film and anaerobic activated sludge.
4. according to claim 2 described microorganism growth unit, it is characterized in that microbial fixed carrier adopts the surface modification foamed ceramics, promptly all are aerobic, anaerobism and double oxygen microbial film be all attached on the surface modification foamed ceramics specific surface, and adhering mode is absorption-crosslinked.
5. 1 described circulation is adhered to-the suspension microorganism sewage purification system according to claim, it is characterized in that the preliminary sedimentation tank in the sewage introducing pretreatment unit to be clean, after the physical method pre-treatment, under the control of measurement and control unit, be pumped into water distributor, drip to spatter by water distributor and enter A district, microorganism growth unit, arrive the B district by the pressure water distributor again.Under the effect of cycling element, sewage circulates repeatedly in A district, microorganism growth unit and B district.
6. 1 described circulation is adhered to-the suspension microorganism sewage purification system according to claim, it is characterized in that measurement and control unit carries out water quality monitoring (WQM) to post-processing unit discharging weir notch, and remote interface is sent to environmental administration's monitoring data management platform with monitoring data.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109928513A (en) * | 2019-03-29 | 2019-06-25 | 重庆为明清缘环保技术研究院有限公司 | A method of sewage is handled using industrial circulating water system |
| CN111643963A (en) * | 2020-05-07 | 2020-09-11 | 郑剑波 | Industrial wastewater combined utilization treatment device |
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| US20060243661A1 (en) * | 2003-11-21 | 2006-11-02 | Industrial Technology Research Institute | System for treating wastewater containing organic compounds |
| CN101037282A (en) * | 2007-04-27 | 2007-09-19 | 凌猛 | Water treatment new combined technique with high purification function |
| CN101503267A (en) * | 2009-03-13 | 2009-08-12 | 哈尔滨工业大学 | Coal chemical industry wastewater treating method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060243661A1 (en) * | 2003-11-21 | 2006-11-02 | Industrial Technology Research Institute | System for treating wastewater containing organic compounds |
| CN101037282A (en) * | 2007-04-27 | 2007-09-19 | 凌猛 | Water treatment new combined technique with high purification function |
| CN101503267A (en) * | 2009-03-13 | 2009-08-12 | 哈尔滨工业大学 | Coal chemical industry wastewater treating method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109928513A (en) * | 2019-03-29 | 2019-06-25 | 重庆为明清缘环保技术研究院有限公司 | A method of sewage is handled using industrial circulating water system |
| CN109928513B (en) * | 2019-03-29 | 2022-02-18 | 重庆为明清缘环保技术研究院有限公司 | Method for treating sewage by using industrial circulating water system |
| CN111643963A (en) * | 2020-05-07 | 2020-09-11 | 郑剑波 | Industrial wastewater combined utilization treatment device |
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Application publication date: 20110420 |