CN105174606A - Membrane-technology medical wastewater treatment method and apparatus with ultraviolet ray disinfection - Google Patents
Membrane-technology medical wastewater treatment method and apparatus with ultraviolet ray disinfection Download PDFInfo
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- CN105174606A CN105174606A CN201510449482.3A CN201510449482A CN105174606A CN 105174606 A CN105174606 A CN 105174606A CN 201510449482 A CN201510449482 A CN 201510449482A CN 105174606 A CN105174606 A CN 105174606A
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Abstract
The present invention provides a membrane-technology medical wastewater treatment method and a membrane-technology medical wastewater treatment apparatus with ultraviolet ray disinfection, and belongs to the technical field of wastewater treatment. The method solves technical problems that sludge is easily produced in existing wastewater treatment, a wastewaster treatment apparatus has a large occupied area, and the like. The medical wastewater treatment method provided by the present invention comprises: a. pretreatment: putting the wastewater into a decomposition tank, and using an anaerobic fermentation method to treat the wastewater; b. aerobic treatment: putting the wastewater treated in the step a into an aeration tank, and using an aeration method to enable full contact between air and the wastewater; c. membrane module treatment: putting the wastewater treated in the step b into a membrane module treatment tank, using a membrane-bioreactor to filter and intercept suspended substances in the wastewater, and performing degradation on organic substances and oxidizable substances in the wastewater; and d. ultraviolet disinfection, emission, and the like. The present invention further comprises an apparatus for implementing the method. According to the present invention, the medical wastewater treatment method is good in water discharge effect, the suspended substances are smaller than 10 mg/L, ultraviolet sterilization is utilized, no secondary pollution is produced, and therefore, the method is safe in operation, reliable, and low in production, operation and maintenance cost.
Description
Technical field
The invention belongs to medical waste water processing technology field, relate to a kind of membrane technique medical waste water treatment process with disinfection by ultraviolet light and device.
Background technology
Freshwater resources are in the world deficienter comparatively speaking, and China is a serious water shortage country, and sewage disposal and reuse are one of effective measure developing water resources.Reusing sewage be by municipal effluent, industrial sewage etc. by after waste disposal plant process, reused; Various sewage can obtain nearby, can remove long distance water transfer from, and realizes processing nearby realizing making full use of of water resources, and sewage processes through nearby simultaneously, also can prevent sewage from long distance delivery process, causing effluent seepage, cause polluted underground water source; Reusing sewage in the world the area of many lacks of water extensively adopt.
China's patent (notification number: CN203946925U; Publication date: 2014-11-19) disclose a kind of sewage treatment pot, filtration membrane cartridge and filtering membrane automatic cleaning apparatus is provided with in its tank body, under the effect of filtration membrane cartridge, dirt in sewage can form filtering membrane, the filtering membrane vibration that filtering membrane automatic cleaning apparatus makes to be formed by dirt, partial exfoliation, can effectively prevent filtering membrane from hardening, reduce cleaning frequency and the maintenance cost of sewage treatment pot, make the prolongs operating time of sewage treatment pot, sewage load increases, and sewage treatment capacity is improved; By arranging flushing arrangement, when sewage treatment pot quits work, tank body and/or filtration membrane cartridge are rinsed, cured to prevent the dirt retention in sewage from forming extension on the inner-wall surface of tank body, or dirt retention is on filtration membrane cartridge, the water space excessively on blocking filtration membrane cartridge.
Although the sewage treatment pot in above-mentioned patent is provided with filtering membrane automatic cleaning apparatus can cleaned filter membrane, but this apparatus structure is complicated, take up room larger, the common filtering membrane that in above-mentioned patent, sewage treatment pot adopts simultaneously can be settled out a large amount of mud, be difficult to process, and the Effects of Water Quality filtered has much room for improvement.
Summary of the invention
The present invention is directed to the problems referred to above that existing technology exists, a kind of membrane technique medical waste water treatment process with disinfection by ultraviolet light and device are provided, technical problem to be solved by this invention: one is the Effects of Water Quality after how improving sewage treating efficiency and sewage disposal, two is how to reduce the floor space of waste disposal plant and the Effects of Water Quality after improving sewage disposal.
First object of the present invention realizes by following technical proposal:
With a membrane technique medical waste water treatment process for disinfection by ultraviolet light, it is characterized in that, the membrane technique medical waste water treatment process of described band disinfection by ultraviolet light comprises the following steps:
A, pre-treatment: inserted by sewage in decomposing pool, utilize Unareobic fermentation to dispose of sewage;
B, aerobic treatment: insert in aeration tank by the sewage through step a process, utilize aeration means that air is fully contacted with sewage;
C, membrane module process: the sewage through step b process is inserted in membrane module treating pond, utilize film-bioreactor to be filtered by the suspended substance in sewage to retain, and the organism in sewage and an oxidisable substance are degraded or oxygenolysis, reduce the biochemical oxygen demand in sewage and biochemical oxygen demand figureofmerit;
D, sterilization discharge: utilize vacuum primingpump by the sewage sucking-off through step c process, and enter ultraviolet tube lamp sterilization, discharge after reaching emission standard.
Its principle is as follows: adopt MBR (MembraneBio-Reactor in the technical program, film-bioreactor) as sewage disposal purification membrane assembly, sewage enters district decomposing pool pre-treatment, Unareobic fermentation is utilized to dispose of sewage, under the effect of anaerobion, to biodegradable high-concentration sewage through anaerobically fermenting, most of organism is degraded, Preliminary sewage is purified, in the process of degradation of organic substances, constantly produces mud.Then sewage enters in two aeration tanks, district, through aeration structure, air is strongly fully contacted with sewage, the oxygen in air is its object is to be dissolved in sewage, gas unwanted in sewage and volatile matter are banished in air, promote exchange of substance between gas and liquid, thus further aerobic treatment, aeration structure can also by the object making water movement reach fully mixing and stir, oxygen in air is delivered in sewage by aeration and contacts with organism or an oxidisable substance, reduce COD and the BOD (COD:ChemicalOxygenDemand in sewage, utilize chemical oxidizing agent by an oxidisable substance oxygenolysis in water, the consumption of oxygen is calculated according to the gauge of residual oxygenant, BOD:BiochemicalOxygenDemand, biochemical oxygen demand (BOD) or biochemical oxygen demand, represent a comprehensively instruction of the aerobic pollution matter content such as Organic substance in water) index.Then sewage enters three district's membrane module treating ponds again via film-bioreactor process, retain the organism in suspended substance and degradation of sewage and an oxidisable substance, then outlet conduit is utilized to be sucked out and enter quartz burner and carry out disinfection by the sewage after process, last qualified discharge by vacuum primingpump.
The technical program may be used for medical waste water process, and this cleanup standard adopts the regulation of " medical waste water emission standard " (GB/T18466-2005).
In the membrane technique medical waste water treatment process of above-mentioned band disinfection by ultraviolet light, before step a, utilize pipeline to collect sanitary wastewater, remove macrobead suspended substance in sewage by grating tank.
In the membrane technique medical waste water treatment process of above-mentioned band disinfection by ultraviolet light, in step a, the suspended substance in preliminary removal sewage and organism make the index of suspended substance and biochemical oxygen demand in sewage reach 40% ~ 50% and 20% ~ 30% respectively.SS (SuspendedSubstance after step a process, suspended substance in water quality) reach 40% ~ 50%, preferably 45%, BOD (BiochemicalOxygenDemand, biochemical oxygen demand (BOD) or biochemical oxygen demand, representing a comprehensively instruction of the aerobic pollution matter content such as Organic substance in water) index reaches 20% ~ 30%, is preferably 25%.
In the membrane technique medical waste water treatment process of above-mentioned band disinfection by ultraviolet light, in step c, film-bioreactor is utilized to retain the suspended substance of 90%-95% in sewage.After step c process, the suspended substance in sewage is filtered further and is processed, and the clearance of SS (SuspendedSubstance, the suspended substance in water quality) reaches 90%-95%, thus meets sewage disposal emission standard.
In the membrane technique medical waste water treatment process of above-mentioned band disinfection by ultraviolet light, in steps d, the UV-light that quartz burner sends is C ray, and wavelength is 240nm ~ 260nm.In the technical program, optimal wavelength is the ultraviolet of 253.7nm.Ultra-violet sterilization UV lamp sends the ultraviolet of wavelength 253.7nm, and ultraviolet germicidal lamp just can kill bacteriophage within several seconds time, and germ-killing efficiency is up to 99%.This ultraviolet makes to form thymine dimer in the protein generation sex change dissociation of bacterium and virus, nucleic acid, thus destroys DNA and the RNA structure of various virus and bacterium, kills the inextinguishable bacterium of other sterilization methods.
The UV photons of each wavelength 253.7nm has the energy of 4.9eV.When uviolizing is to microorganism, transmission and the accumulation of energy just occurs, accumulation result causes bacteria inactivation rate, thus reaches the object of sterilization.Work as bacterium, virus adsorption is more than 3600 ~ 65000uW/cm
2during metering, have powerful destructive force to bacterium, viral deoxyribose nucleic acid (DNA) and ribonucleic (RNA), can make bacterium, virus forfeiture viability and reproductivity and then eliminating bacteria, virus, reaches sterilization effect.Ultraviolet can make nucleic acid mutation on the one hand, hinders it to copy, and transcribes the synthesis of blockade and protein; Produce free radical on the one hand and can cause photo-ionisation, thus cause the death of cell.
Second object of the present invention realizes by following technical proposal:
A kind of membrane technique medical waste water treatment unit with disinfection by ultraviolet light, it is characterized in that, the membrane technique medical waste water treatment unit of described band disinfection by ultraviolet light comprises the tank body with cavity, the water-in being communicated with cavity is offered on the upside of described tank body, described cavity comprises decomposing pool spaced apart from each other, aeration tank and membrane module treating pond, described water-in is above described decomposing pool and between described decomposing pool and aeration tank, all be connected between described aeration tank with described membrane module treating pond, aeration structure is provided with in described aeration tank, film-bioreactor is provided with in described membrane module treating pond, outlet conduit is connected with in described membrane module treating pond, the membrane technique medical waste water treatment unit of described band disinfection by ultraviolet light also comprises the quartz burner that can carry out disinfection to the liquid in outlet conduit.
Its principle is as follows: the membrane technique medical waste water treatment process using the band disinfection by ultraviolet light of first technical scheme, and to combine and in technical scheme, membrane technique medical waste water treatment unit with disinfection by ultraviolet light reaches the object of disposing of sewage, the sanitary wastewater collected is connected with the water-in on this tank body through piping, sewage flows into decomposing pool from water-in, at decomposing pool through preliminary sedimentation Sum decomposition, in aeration tank, through aeration structure, air is strongly fully contacted with sewage again, the oxygen in air is its object is to be dissolved in sewage, gas unwanted in sewage and volatile matter are banished in air, promote exchange of substance between gas and liquid, thus further aerobic treatment, and then in membrane module treating pond, cultivate in membrane module treating pond and have a large amount of domestication bacteriums, under the metabolism of double oxygen, aerobic microbiological, each pollutant in sewage is removed, can be accomplished completely " solid-liquid separation " by the filteration of film, thus ensureing that delivery turbidity is down to extremely low, each pollutant in sewage is also further removed by the filteration of film.Sewage adopts ultra-violet sterilization again after film-bioreactor process, the ultraviolet that quartz burner is launched can make protein generation sex change dissociation, thymine dimer is formed in nucleic acid, destroy DNA and the RNA structure of various virus and bacterium, cause the death of bacterium and virus, can also kill other sterilization methods can not the bacterium of sterilization; The ultraviolet that this quartz burner is launched just can kill bacteriophage within several seconds time, and germ-killing efficiency is up to 99%.Eventually pass outlet conduit and discharge the good water of water quality, the Recovery Purifying completing sewage utilizes.The membrane technique medical waste water treatment unit compact construction of this band disinfection by ultraviolet light, floor space is little, and the mud of generation is few, and sewage treating efficiency is high, and Effects of Water Quality is good.
In membrane module treating pond, organic degraded is mainly completed under the effect of facultative anaerobic bacterium by the mud forming higher concentration; Macromole organic pollutant is progressively degraded to small organic molecule, and final oxygenolysis is CO
2, H
2the inorganic substance that O etc. are stable, the generation due to facultative anaerobe does not need the guarantee of dissolved oxygen, so reduce power consumption.Film-bioreactor, while realizing waste water treating and reutilizing, achieves the significantly decrement of organic sludge, can realize, substantially without organic residual mud discharging, successfully solving excess sludge disposal difficulties.
Newly-increased organism is broken down into small organic molecule in the effect next section of facultative anaerobe, is then oxidizedly decomposed into CO
2, H
2the inorganicss such as O; Another part is synthesized as cell.Under low sludge loading condition, this cell is broken down into small organic molecule as nutrition again in facultative anaerobe effect next section, is then oxidizedly again decomposed into CO
2, H
2the inorganicss such as O; Another part is synthesized again as new cell.The rest may be inferred, and under low sludge loading condition, this new cell, again as nutrition, continues the metabolism making decomposition and synthesis under the effect of facultative anaerobe, until the last all metabolism of cell are CO
2, H
2the inorganicss such as O.
When cell newly-increased in system equals metabolic rate, organic sludge zero growth rate.The applicant monitors out when mud autodigestion and propagation reach running balance by long-term experiment, and intrasystem sludge loading maintains 0.072kg (COD)/kg (MLSSd) substantially.Water inlet organic contamination substrate concentration is high, and newly-increased cell is many, and metabolic rate is high, and MLVSS raises; Otherwise water inlet organic contamination substrate concentration is low, newly-increased cell is few, and metabolic rate is low, and MLVSS reduces.Because bacterium can be retained down by film-bioreactor, sludge concentration can fluctuate with influent concentration in wider scope, guarantee that system can be run under 0.072kg (COD)/kg (MLSSd) this sludge loading, realize the near zero release of organic residual mud.And by the operation of not sludge discharge way, longer sludge age can be maintained, inhibit hyphomycetic propagation, solve the sludge bulking problem in not spoil disposal situation.
Sewage dephosphorization technology mainly contains chemical dephosphorization and biological phosphate-eliminating, and chemical dephosphorization dosing is large, and the chemical sludge of generation is many, and running cost is high; Biological phosphate-eliminating need be realized by spoil disposal, and there is an excess sludge process difficult problem, the technical program utilizes film-bioreactor to decompose organic sludge, solves this difficult problem.
Also adopt oxygen biogasification dephosphorization process of holding concurrently in the technical program, the reaction mechanism of Anammox is: under certain condition, and nitrification produces a large amount of NO
2-accumulation, anaerobic ammonia oxidizing bacteria is first by NO
2-change into NH
2oH, then with NH
2oH is that electron acceptor(EA) is by NH
4+oxidation generates N
2h
4; N
2h
4change into N
2, and be NO
2-be reduced into NH
2oH provides electronics, has a small amount of NO in experiment
2-be oxidized to NO
2-.Owing to achieving short distance nitration, Anammox effect, decrease oxygen supply, significantly reduce carbon source needed for aeration energy consumption and denitrification, thus achieve efficient denitrification object.On the implementation, not only to optimize nutritional condition and envrionment conditions, promote the growth of anaerobic ammonia oxidizing bacteria, will manage to improve the settling property of thalline simultaneously and improve the structure of reactor, impelling function yeast effectively to hold and stay.
The chemical reaction that Anammox relates to is:
NH
2OH+NH
3→N
2H
4+H
2O；
N
2H
4→N
2+4[H]；
HNO
2+4[H]→NH
2OH+H
2O。
In the membrane technique medical waste water treatment unit of above-mentioned band disinfection by ultraviolet light, be interval with dividing plate one straight up and dividing plate two in described tank body successively, the cavity of described tank body is divided into described decomposing pool, aeration tank and membrane module treating pond by described dividing plate one and dividing plate two; Between the equal and upper inside walls of described tank body in the upper surface of described dividing plate one and dividing plate two, there is gap.Sewage is flushed to bottom under gravity after entering from top to bottom from water-in, reach a certain amount of and automatically cover dividing plate one or dividing plate two afterwards, enter next process in treating processes, ensures fully reaction while improving automatization.
In the membrane technique medical waste water treatment unit of above-mentioned band disinfection by ultraviolet light, the membrane technique medical waste water treatment unit of described band disinfection by ultraviolet light also comprises water outlet, described quartz burner is arranged on above described tank body, described outlet conduit is provided with vacuum primingpump, one end of described outlet conduit is arranged on described film-bioreactor side, described outlet conduit through the uviolizing region of described quartz burner and the described outlet conduit the other end be connected with described water outlet.
In the membrane technique medical waste water treatment unit of above-mentioned band disinfection by ultraviolet light, described aeration structure comprises the blower fan be arranged on above described tank body, described aeration tank is provided with some diffusion discs with aperture of giving vent to anger near bottom interval, and the aperture of giving vent to anger of described diffusion disc is connected by breather line one with described blower fan.Diffusion disc in the technical program comprises the coniform blade that escape pipe upper end is arranged, and coniform blade is offered some apertures of giving vent to anger, aperture of giving vent to anger is connected with escape pipe, and escape pipe lower end breather line one is connected.
In the membrane technique medical waste water treatment unit of above-mentioned band disinfection by ultraviolet light, described blower fan is also connected with breather line two, and the air outlet of described breather line two is positioned at described film-bioreactor place.In the technical program, blower fan is by breather line two pairs of film-bioreactor place ventilations, thus the film silk of film-bioreactor is washed away, shaken, and preventing pollution and the blocking of film-bioreactor, the dissolved oxygen simultaneously produced just in time is used for the oxidation of part small organic molecule and maintains the dissolved oxygen value of water outlet.
Compared with prior art, the technical scheme in the present invention has the following advantages:
1, the membrane technique medical waste water treatment process outlet effect of this band disinfection by ultraviolet light is good, and suspended substance is less than 10mg/L.
2, the membrane technique medical waste water treatment process of this band disinfection by ultraviolet light utilizes ultra-violet sterilization non-secondary pollution, operating safety, reliable and cost and operation and maintenance cost low.
3, the membrane technique medical waste water treatment unit floor space of this band disinfection by ultraviolet light is few, and integrated level is high, organic sludge near zero release, reduces secondary pollution.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the membrane technique medical waste water treatment process of this band disinfection by ultraviolet light.
Fig. 2 be the membrane technique medical waste water treatment unit of this band disinfection by ultraviolet light face structural representation.
Fig. 3 is the plan structure schematic diagram of the membrane technique medical waste water treatment unit of this band disinfection by ultraviolet light.
In figure, 1, tank body; 2, cavity; 3, water-in; 4, water outlet; 5, vacuum primingpump; 6, dividing plate one; 7, dividing plate two; 8, decomposing pool; 9, aeration tank; 10, membrane module treating pond; 11, film-bioreactor; 12, aeration structure; 121, blower fan; 122, diffusion disc; 123, breather line one; 13, outlet conduit; 14, breather line two; 15, quartz burner.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, Figure 2 and Figure 3, the membrane technique medical waste water treatment process of this band disinfection by ultraviolet light comprises the following steps:
Utilize pipeline to collect sanitary wastewater, remove macrobead suspended substance in sewage by grating tank.
A, pre-treatment: inserted by sewage in decomposing pool 8, utilize Unareobic fermentation to dispose of sewage; Suspended substance in preliminary removal sewage and organism make the index of suspended substance and biochemical oxygen demand in sewage reach 40% ~ 50% and 20% ~ 30% respectively.Preferably past SS (SuspendedSubstance after step a process in the present embodiment, suspended substance in water quality) reach 45%, preferably 45%, BOD (BiochemicalOxygenDemand, biochemical oxygen demand (BOD) or biochemical oxygen demand, represent a comprehensively instruction of the aerobic pollution matter content such as Organic substance in water) index reaches 25%.
B, aerobic treatment: inserted in aeration tank 9 by the sewage through step a process, utilize aeration means that air is fully contacted with sewage;
C, membrane module process: the sewage through step b process is inserted in membrane module treating pond 10, utilize film-bioreactor 11 to be filtered by the suspended substance in sewage to retain, and the organism in sewage and an oxidisable substance are degraded or oxygenolysis, reduce the biochemical oxygen demand in sewage and biochemical oxygen demand figureofmerit; Film-bioreactor 11 is utilized to retain the suspended substance of 90%-95% in sewage.The clearance being preferably SS (SuspendedSubstance, the suspended substance in water quality) in the present embodiment reaches 95%, thus meets sewage disposal emission standard.
D, sterilization discharge: utilize vacuum primingpump 5 by the sewage sucking-off through step c process, and enter quartz burner 15 and sterilize, discharge after reaching emission standard; The UV-light that quartz burner 15 sends is C ray, and wavelength is 240nm ~ 260nm; In the present embodiment, optimal wavelength is the ultraviolet of 253.7nm.
Adopt MBR (MembraneBio-Reactor, film-bioreactor 11 is as sewage disposal purification membrane assembly, sewage enters district's decomposing pool 8 pre-treatment, Unareobic fermentation is utilized to dispose of sewage, under the effect of anaerobion, to biodegradable high-concentration sewage through anaerobically fermenting, most of organism is degraded, Preliminary sewage is purified, in the process of degradation of organic substances, constantly produces mud.Then sewage enters in two aeration tanks, district 9, through aeration structure 12, air is strongly fully contacted with sewage, the oxygen in air is its object is to be dissolved in sewage, gas unwanted in sewage and volatile matter are banished in air, promote exchange of substance between gas and liquid, thus further aerobic treatment, aeration structure 12 can also by the object making water movement reach fully mixing and stir, oxygen in air is delivered in sewage by aeration and contacts with organism or an oxidisable substance, reduce COD and the BOD (COD:ChemicalOxygenDemand in sewage, utilize chemical oxidizing agent by an oxidisable substance oxygenolysis in water, the consumption of oxygen is calculated according to the gauge of residual oxygenant, BOD:BiochemicalOxygenDemand, biochemical oxygen demand (BOD) or biochemical oxygen demand, represent a comprehensively instruction of the aerobic pollution matter content such as Organic substance in water) index.Then sewage enters three district's membrane module treating ponds 10 again and processes via film-bioreactor 11, retain the organism in suspended substance and degradation of sewage and an oxidisable substance, then outlet conduit 13 is utilized to be sucked out and enter quartz burner 15 and carry out disinfection by the sewage after process, last qualified discharge by vacuum primingpump 5.
The present embodiment middle-ultraviolet lamp sterilization UV lamp sends the ultraviolet of wavelength 253.7nm, and ultraviolet germicidal lamp just can kill bacteriophage within several seconds time, and germ-killing efficiency is up to 99%.This ultraviolet makes to form thymine dimer in the protein generation sex change dissociation of bacterium and virus, nucleic acid, thus destroys DNA and the RNA structure of various virus and bacterium, kills the inextinguishable bacterium of other sterilization methods; The UV photons of each wavelength 253.7nm has the energy of 4.9eV.When uviolizing is to microorganism, transmission and the accumulation of energy just occurs, accumulation result causes bacteria inactivation rate, thus reaches the object of sterilization.Work as bacterium, virus adsorption is more than 3600 ~ 65000uW/cm
2during metering, have powerful destructive force to bacterium, viral deoxyribose nucleic acid (DNA) and ribonucleic (RNA), can make bacterium, virus forfeiture viability and reproductivity and then eliminating bacteria, virus, reaches sterilization effect.Ultraviolet can make nucleic acid mutation on the one hand, hinders it to copy, and transcribes the synthesis of blockade and protein; Produce free radical on the one hand and can cause photo-ionisation, thus cause the death of cell.
The membrane technique medical waste water treatment process of the band disinfection by ultraviolet light in the present embodiment is preferred for medical waste water process, and the sewage standard after process adopts the regulation of " medical waste water emission standard " (GB/T18466-2005).
As shown in Figures 2 and 3, membrane technique medical waste water treatment unit with disinfection by ultraviolet light in the present embodiment comprises the tank body 1 with cavity 2, the water-in 3 being communicated with cavity 2 is offered on the upside of tank body 1, dividing plate 1 straight up and dividing plate 27 is interval with successively, the decomposing pool 8 that the cavity 2 of tank body 1 is divided into by dividing plate 1 and dividing plate 27, aeration tank 9 and membrane module treating pond 10 in tank body 1; The upper surface of dividing plate 1 and dividing plate 27 all and between the upper inside walls of tank body 1 has gap, water-in 3 is above decomposing pool 8 and be all connected between decomposing pool 8 with aeration tank 9, between aeration tank 9 with membrane module treating pond 10, aeration structure 12 is provided with in aeration tank 9, film-bioreactor 11 is provided with in membrane module treating pond 10, be connected with outlet conduit 13 in membrane module treating pond 10, the membrane technique medical waste water treatment unit of band disinfection by ultraviolet light also comprises the quartz burner 15 that can carry out disinfection to the liquid in outlet conduit 13.
The sanitary wastewater collected is connected with the water-in 3 on this tank body 1 through piping, sewage is flushed to bottom decomposing pool 8 under gravity after water-in 3 enters from top to bottom, at decomposing pool 8 through preliminary sedimentation Sum decomposition, reach a certain amount of in treating processes and automatically cover dividing plate 1 afterwards, enter next process, in aeration tank 9, through aeration structure 12, air is strongly fully contacted with sewage, the oxygen in air is its object is to be dissolved in sewage, gas unwanted in sewage and volatile matter are banished in air, promote exchange of substance between gas and liquid, thus further aerobic treatment, and then by the gap between dividing plate 27 and tank body 1 upper inside walls in membrane module treating pond 10, cultivate in membrane module treating pond 10 and have a large amount of domestication bacteriums, under the metabolism of double oxygen, aerobic microbiological, each pollutant in sewage is removed, can be accomplished completely " solid-liquid separation " by the filteration of film, thus ensureing that delivery turbidity is down to extremely low, each pollutant in sewage is also further removed by the filteration of film.Sewage adopts ultra-violet sterilization again after film-bioreactor 11 processes, the ultraviolet that quartz burner 15 is launched can make protein generation sex change dissociation, thymine dimer is formed in nucleic acid, destroy DNA and the RNA structure of various virus and bacterium, cause the death of bacterium and virus, can also kill other sterilization methods can not the bacterium of sterilization; The ultraviolet that this quartz burner 15 is launched just can kill bacteriophage within several seconds time, and germ-killing efficiency is up to 99%.Eventually pass outlet conduit 13 and discharge the good water of water quality, the Recovery Purifying completing sewage utilizes.The membrane technique medical waste water treatment unit compact construction of this band disinfection by ultraviolet light, floor space is little, and the mud of generation is few, and sewage treating efficiency is high, and Effects of Water Quality is good.
As shown in Figures 2 and 3, membrane technique medical waste water treatment unit with disinfection by ultraviolet light also comprises water outlet 4, quartz burner 15 is arranged on above tank body 1, outlet conduit 13 is provided with vacuum primingpump 5, one end of outlet conduit 13 is arranged on film-bioreactor 11 side, outlet conduit 13 through the uviolizing region of quartz burner 15 and outlet conduit 13 the other end be connected with water outlet 4; Aeration structure 12 comprises the blower fan 121 be arranged on above tank body 1, and aeration tank 9 is provided with some diffusion discs 122 with aperture of giving vent to anger near bottom interval, and the aperture of giving vent to anger of diffusion disc 122 is connected by breather line 1 with blower fan 121.Diffusion disc 122 in the technical program comprises the coniform blade that escape pipe upper end is arranged, and coniform blade is offered some apertures of giving vent to anger, aperture of giving vent to anger is connected with escape pipe, and escape pipe lower end breather line 1 is connected; Blower fan 121 is also connected with breather line 2 14, the air outlet of breather line 2 14 is positioned at film-bioreactor 11 place, blower fan 121 is by breather line 2 14 pairs of film-bioreactor 11 place ventilations, thus the film silk of film-bioreactor 11 is washed away, shaken, and preventing pollution and the blocking of film-bioreactor 11, the dissolved oxygen simultaneously produced just in time is used for the oxidation of part small organic molecule and maintains the dissolved oxygen value of water outlet.
In membrane module treating pond 10, organic degraded is mainly completed under the effect of facultative anaerobic bacterium by the mud forming higher concentration; Macromole organic pollutant is progressively degraded to small organic molecule, and final oxygenolysis is CO
2, H
2the inorganic substance that O etc. are stable, the generation due to facultative anaerobe does not need the guarantee of dissolved oxygen, so reduce power consumption.Film-bioreactor 11, while realizing waste water treating and reutilizing, achieves the significantly decrement of organic sludge, can realize, substantially without organic residual mud discharging, successfully solving excess sludge disposal difficulties.
Newly-increased organism is broken down into small organic molecule in the effect next section of facultative anaerobe, is then oxidizedly decomposed into CO
2, H
2the inorganicss such as O; Another part is synthesized as cell.Under low sludge loading condition, this cell is broken down into small organic molecule as nutrition again in facultative anaerobe effect next section, is then oxidizedly again decomposed into CO
2, H
2the inorganicss such as O; Another part is synthesized again as new cell.The rest may be inferred, and under low sludge loading condition, this new cell, again as nutrition, continues the metabolism making decomposition and synthesis under the effect of facultative anaerobe, until the last all metabolism of cell are CO
2, H
2the inorganicss such as O.
When cell newly-increased in system equals metabolic rate, organic sludge zero growth rate.The applicant monitors out when mud autodigestion and propagation reach running balance by long-term experiment, and intrasystem sludge loading maintains 0.072kg (COD)/kg (MLSSd) substantially.Water inlet organic contamination substrate concentration is high, and newly-increased cell is many, and metabolic rate is high, and MLVSS raises; Otherwise water inlet organic contamination substrate concentration is low, newly-increased cell is few, and metabolic rate is low, and MLVSS reduces.Because bacterium can be retained down by film-bioreactor 11, sludge concentration can fluctuate with influent concentration in wider scope, guarantee that system can be run under 0.072kg (COD)/kg (MLSSd) this sludge loading, realize the near zero release of organic residual mud.And by the operation of not sludge discharge way, longer sludge age can be maintained, inhibit hyphomycetic propagation, solve the sludge bulking problem in not spoil disposal situation.
Sewage dephosphorization technology mainly contains chemical dephosphorization and biological phosphate-eliminating, and chemical dephosphorization dosing is large, and the chemical sludge of generation is many, and running cost is high; Biological phosphate-eliminating need be realized by spoil disposal, there is an excess sludge process difficult problem, and the technical program utilizes film-bioreactor 11 pairs of organic sludges to decompose, and solves this difficult problem.
Also adopt oxygen biogasification dephosphorization process of holding concurrently in the technical program, the reaction mechanism of Anammox is: under certain condition, and nitrification produces a large amount of NO
2-accumulation, anaerobic ammonia oxidizing bacteria is first by NO
2-change into NH
2oH, then with NH
2oH is that electron acceptor(EA) is by NH
4+oxidation generates N
2h
4; N
2h
4change into N
2, and be NO
2-be reduced into NH
2oH provides electronics, has a small amount of NO in experiment
2-be oxidized to NO
2-.Owing to achieving short distance nitration, Anammox effect, decrease oxygen supply, significantly reduce carbon source needed for aeration energy consumption and denitrification, thus achieve efficient denitrification object.On the implementation, not only to optimize nutritional condition and envrionment conditions, promote the growth of anaerobic ammonia oxidizing bacteria, will manage to improve the settling property of thalline simultaneously and improve the structure of reactor, impelling function yeast effectively to hold and stay.
The chemical reaction that Anammox relates to is:
NH
2OH+NH
3→N
2H
4+H
2O；
N
2H
4→N
2+4[H]；
HNO
2+4[H]→NH
2OH+H
2O。
In use, film can be subject to certain pollution to the membrane module of film-bioreactor 11, for ensureing the normal work of film, also arranges backwash process or preparation medicament soaking and washing in integrated MBR equipment in the present embodiment.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (10)
1. the membrane technique medical waste water treatment process with disinfection by ultraviolet light, is characterized in that, the membrane technique medical waste water treatment process of described band disinfection by ultraviolet light comprises the following steps:
A, pre-treatment: sewage is inserted in decomposing pool (8), utilize Unareobic fermentation to dispose of sewage;
B, aerobic treatment: inserted by the sewage through step a process in aeration tank (9), utilize aeration means that air is fully contacted with sewage;
C, membrane module process: the sewage through step b process is inserted in membrane module treating pond (10), utilize film-bioreactor (11) to be filtered by the suspended substance in sewage to retain, and the organism in sewage and an oxidisable substance are degraded or oxygenolysis, reduce the biochemical oxygen demand in sewage and biochemical oxygen demand figureofmerit;
D, sterilization discharge: utilize vacuum primingpump (5) by the sewage sucking-off through step c process, and enter quartz burner (15) sterilization, discharge after reaching emission standard.
2. a kind of membrane technique medical waste water treatment process with disinfection by ultraviolet light according to claim 1, is characterized in that, before step a, utilizes pipeline to collect sanitary wastewater, removes macrobead suspended substance in sewage by grating tank.
3. a kind of membrane technique medical waste water treatment process with disinfection by ultraviolet light according to claim 1 and 2, it is characterized in that, in step a, the suspended substance in preliminary removal sewage and organism make the index of suspended substance and biochemical oxygen demand in sewage reach 40% ~ 50% and 20% ~ 30% respectively.
4. a kind of membrane technique medical waste water treatment process with disinfection by ultraviolet light according to claim 1 and 2, is characterized in that, in step c, utilizes film-bioreactor (11) to retain the suspended substance of 90%-95% in sewage.
5. a kind of membrane technique medical waste water treatment process with disinfection by ultraviolet light according to claim 1 and 2, it is characterized in that, in steps d, the UV-light that quartz burner (15) sends is C ray, and wavelength is 240nm ~ 260nm.
6. the membrane technique medical waste water treatment unit with disinfection by ultraviolet light, it is characterized in that, the membrane technique medical waste water treatment unit of described band disinfection by ultraviolet light comprises the tank body (1) with cavity (2), described tank body (1) upside offers the water-in (3) being communicated with cavity (2), described cavity comprises decomposing pool spaced apart from each other (8), aeration tank (9) and membrane module treating pond (10), described water-in (3) be positioned at described decomposing pool (8) top and between described decomposing pool (8) and aeration tank (9), all be connected between described aeration tank (9) with described membrane module treating pond (10), aeration structure (12) is provided with in described aeration tank (9), film-bioreactor (11) is provided with in described membrane module treating pond (10), outlet conduit (13) is connected with in described membrane module treating pond (10), the membrane technique medical waste water treatment unit of described band disinfection by ultraviolet light also comprises the quartz burner (15) that can carry out disinfection to the liquid in outlet conduit (13).
7. a kind of membrane technique medical waste water treatment unit with disinfection by ultraviolet light according to claim 6, it is characterized in that, be interval with dividing plate one (6) straight up and dividing plate two (7) in described tank body (1) successively, the cavity (2) of described tank body (1) is divided into described decomposing pool (8), aeration tank (9) and membrane module treating pond (10) by described dividing plate one (6) and dividing plate two (7); The upper surface of described dividing plate one (6) and dividing plate two (7) all and between the upper inside walls of described tank body (1) has gap.
8. a kind of membrane technique medical waste water treatment unit with disinfection by ultraviolet light according to claim 6 or 7, it is characterized in that, the membrane technique medical waste water treatment unit of described band disinfection by ultraviolet light also comprises water outlet (4), described quartz burner (15) is arranged on described tank body (1) top, described outlet conduit (13) is provided with vacuum primingpump (5), one end of described outlet conduit (13) is arranged on described film-bioreactor (11) side, described outlet conduit (13) through the uviolizing region of described quartz burner (15) and described outlet conduit (13) the other end be connected with described water outlet (4).
9. a kind of membrane technique medical waste water treatment unit with disinfection by ultraviolet light according to claim 6 or 7, it is characterized in that, described aeration structure (12) comprises the blower fan (121) being arranged on described tank body (1) top, described aeration tank (9) is provided with some diffusion discs (122) with aperture of giving vent to anger near bottom interval, and the aperture of giving vent to anger of described diffusion disc (122) is connected by breather line one (123) with described blower fan (121).
10. a kind of membrane technique medical waste water treatment unit with disinfection by ultraviolet light according to claim 9, it is characterized in that, described blower fan (121) is also connected with breather line two (14), and the air outlet of described breather line two (14) is positioned at described film-bioreactor (11) place.
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| CN107043199A (en) * | 2017-05-05 | 2017-08-15 | 河南恒安环保科技有限公司 | A kind of sewage disposal of hospital and its recovery method as resource |
| CN113461262A (en) * | 2021-07-06 | 2021-10-01 | 深圳信息职业技术学院 | Ultraviolet ray disinfection water treatment system with automatic ultraviolet irradiance adjusting function |
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| US20100326908A1 (en) * | 2009-06-24 | 2010-12-30 | Abdullah Saeed Al-Ghamdi | Wastewater treatment system |
| CN102241456A (en) * | 2010-05-11 | 2011-11-16 | 朴显泽 | Hospital waste water treatment system |
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| CN105174606B (en) | 2016-06-29 |
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