CN203947003U - A kind of Sewage treatment systems - Google Patents
A kind of Sewage treatment systems Download PDFInfo
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- CN203947003U CN203947003U CN201420355076.1U CN201420355076U CN203947003U CN 203947003 U CN203947003 U CN 203947003U CN 201420355076 U CN201420355076 U CN 201420355076U CN 203947003 U CN203947003 U CN 203947003U
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Abstract
The utility model discloses a kind of Sewage treatment systems of utilizing biological nitrogen fixation, this system mainly comprises for waste water being carried out to exhausted bacterium purifying, for the treatment of the luminous energy fixed nitrogen reactor of pretreated waste water, for add the medicament addition device of nutritive substance in described luminous energy fixed nitrogen reactor, for the treatment of the ultra-filtration equipment of the waste water after described luminous energy fixed nitrogen reactor for treatment, and sewage sludge storage device, in described luminous energy fixed nitrogen reactor, there is the anaerobic sludge of exhibiting high surface apposition growth nitrogen-fixing bacteria, and, described luminous energy fixed nitrogen reactor is built-in with light source, heating unit and temperature-control device, described luminous energy fixed nitrogen reactor head arranges tail gas collecting device.Sewage treatment systems of the present utility model significantly shortened process, save capital construction and maintenance cost, reached better Nitrogen/Phosphorus Removal, ensured the reasonable utilization of phosphorus, avoided secondary pollution, energy consumption significantly to reduce simultaneously.
Description
Technical field
The utility model relates to technical field of sewage, particularly a kind of Sewage treatment systems of utilizing biological nitrogen fixation.
Background technology
Since 20 century 70s, countries in the world recognize that the nitrogen and phosphorus content of controlling in water body is the important factor that suppresses body eutrophication, and then advanced the improving constantly of denitrogenation dephosphorizing requirement in sewage disposal, cause also more and more higher problem thereupon of the investment of the day by day complicated and sewage disposal of sewage treatment process and operation thereof and working cost thereof.Therefore how under the prerequisite that meets processing requirements, simplification of flowsheet, reduces construction investment and working cost, is the common issue that countries in the world face.Present stage various dephosphorization and denitrification process be generally all de-carbon, denitrogenate, the organic assembling of three kinds of flow processs of dephosphorization, that wherein extensively use is anaerobic-anoxic-oxic biological denitrification phosphorous removal technique (A2O).
In existing denitrogenation dephosphorizing processing technology field, the techniqueflow of conventional anaerobic-anoxic-oxic biological denitrification phosphorous removal technique (A2O) comprises successively the most:
A. pretreatment stage: influent waste water separates floating matter and the suspended particle in sewage by physical chemistry means such as grid, natural sedimentation or dosing precipitations;
B. anaerobic stages: for the treatment of the phosphorus containing sludge refluxing from second pond that flows out the waste water of pretreatment unit and synchronously enter, the phosphorus concentration after processing in sewage raises, dissolved organic matter is absorbed by microorganism cells and makes the BOD5 density loss in water; Meanwhile, NH
3thereby-N reduces its concentration because synthesizing of cell being removed a part, but NO
3the content of-N does not change;
C. the anoxic stage: denitrifying bacteria utilizes organism in sewage as carbon source, by a large amount of NO that bring in backflow mixed liquor
3-N and NO
2-N is reduced to N
2thereby, make BOD5 and NO
3-N density loss, but the variation of phosphorus concentration is less;
D. aerobic stage: organism is declined organic concentration by microbial biochemical degraded; Organonitrogen, by ammonification then by nitrated, makes NH simultaneously
3-N density loss; Along with NO in nitrifying process
3the concentration of-N increases, and phosphorus concentration is also along with the excess ingestion fast-descending of polyP bacteria;
E. sludge treatment: the mud producing in treating processes reduces sludge volume by mode concentrated, dehydration, reduces water ratio, is convenient to follow-up sludge disposal.
Wherein, there is following problem in above-mentioned conventional A2O technical process in practice:
1. reaction tank volume is compared with A/O technique (anaerobic-aerobic technique) is large and sludge reflux amount is large, energy consumption is high: the returned sluge in technological process all enters anaerobism section, and in order to maintain lower sludge loading to ensure the Nitrification of system, reflux ratio generally need remain between 40%-100%, reaction tank volume is increased greatly, capital cost is raise, also increased the expenses such as its operation and maintenance simultaneously;
2. the mutual inhibition of Nitrogen/Phosphorus Removal: in the time that system sludge back flow quantity is larger, in returned sluge, a large amount of nitrate also will be carried secretly to anaerobic pond, and the condition of polyP bacteria release phosphorus is anaerobic state the existence that simultaneously has solvability BOD.In the time that a large amount of nitrate exists, denitrifying bacteria can carry out using organism as carbon source denitrification, and the anaerobism that can start phosphorus after waiting denitrogenation completely discharges, and this useful volume that anaerobism of carrying out phosphorus in anaerobic stages is discharged greatly reduces, the effect that reduces dephosphorization, Comparatively speaking denitrification effect is better; Otherwise, if the nitrification in aerobic section is poor, just the nitrate amount entering in anaerobism section with returned sluge reduces, makes phosphorus be able to sufficient anaerobism and discharge, increase its phosphor-removing effect, but due to nitrated not exclusively, cause denitrification effect not good;
3. water treatment system can produce a large amount of phosphorus containing sludges when the A2O art breading phosphorus-containing wastewater of routine, and this type of mud and concentrated solution thereof, as mishandling, can again enter natural water and form secondary pollution.And on the other hand, as a very important class material in vital movement, be also the raw material extensively using in industrial production simultaneously, phosphoric is unidirectional in the transfer of occurring in nature, and therefore a large amount of exploitations will cause phosphoric to become gradually a kind of rare resources with use.Therefore traditional technique exists the dual contradiction that causes secondary pollution and the wasting of resources to the disposal of phosphorus containing sludge;
4. conventional A2O technique is to be realized denitrogenation dephosphorizing and removed the effect of COD by nitrated-denitrification process, therefore need the sludge reflux of vast scale and Wind Volume aeration to ensure sludge concentration and oxygen-supplying amount in whole process flow, this increases the energy expenditure in technique;
5. conventional A2O Technology denitrification dephosphorization technique long flow path control condition complexity.
Utility model content
The utility model provides a kind of Sewage treatment systems and method of utilizing biological nitrogen fixation, and to solve, technical process of the prior art is long, control condition is complicated, the high energy consumption of nitrated-denitrification process, oxygen concn restrict respectively denitrogenation and phosphor-removing effect and common process produce mud because being difficult to dispose the defect that forms secondary pollution.
The technical solution of the utility model is as follows:
A kind of Sewage treatment systems, comprising:
Preprocessing subsystem, for waste water being carried out to exhausted bacterium purifying, makes in waste water not containing other bacterial classifications;
Luminous energy fixed nitrogen reactor, for the treatment of pretreated waste water; In described luminous energy fixed nitrogen reactor, there is the anaerobic sludge of exhibiting high surface apposition growth nitrogen-fixing bacteria, and, described luminous energy fixed nitrogen reactor is built-in with light source, in addition, in described luminous energy fixed nitrogen reactor, be also provided with heating unit and the temperature-control device of controlling described luminous energy fixed nitrogen reactor temperature, described luminous energy fixed nitrogen reactor head arranges tail gas collecting device;
Medicament addition device, for adding nutritive substance in described luminous energy fixed nitrogen reactor;
Ultra-filtration equipment, for the treatment of the waste water after described luminous energy fixed nitrogen reactor for treatment, holds back majority of organic pollutants in waste water;
Sewage sludge storage device, for storing through ultra-filtration equipment part excess sludge after treatment.
In a preferred embodiment of the present utility model, described nitrogen-fixing bacteria is anaerobic hydrogen-generating bacterium.
In a preferred embodiment of the present utility model, described preprocessing subsystem is sterilization subsystem or ultrafilter system.
In a preferred embodiment of the present utility model, described luminous energy fixed nitrogen reactor comprises an anaerobe fixed nitrogen reaction tank, has the anaerobic sludge of nitrogen-fixing bacteria (as anaerobic hydrogen-generating bacterium) described in exhibiting high surface apposition growth in described anaerobe fixed nitrogen reaction tank.
In a preferred embodiment of the present utility model, the temperature-control device arranging in described luminous energy fixed nitrogen reactor is the temperature alarming control device with warning function.In addition, temperature-control device also can attach other any suitable building blocks of functions.
In a preferred embodiment of the present utility model, the heating unit arranging in described luminous energy fixed nitrogen reactor is steam heater.Can select in addition other any suitable heating unit.
In a preferred embodiment of the present utility model, described ultra-filtration equipment is external placed type ultra-filtration membrane.
In a preferred embodiment of the present utility model, described sewage sludge storage device is sludge storage pool.
Compared with prior art, the beneficial effects of the utility model are as follows:
The one, Sewage treatment systems of the present utility model and method only need arrange anaerobic pond, significantly shortened process, the process of whole denitrogenation dephosphorizing only completes in a reactor simultaneously, and just can reach the effect of denitrogenation dephosphorizing without return-flow system simultaneously, thereby avoid existing technological reaction pool volume large, capital cost is raise, also increased the shortcoming of the expense such as its operation and maintenance simultaneously;
The 2nd, the utility model, owing to having adopted nitrogen-fixing bacteria (as anaerobic hydrogen-generating bacterial flora) as anaerobic treatment section mud, makes nitrogen phosphorus in anaerobic pond, carry out synchronism eliminates, has avoided two kinds of situations that effect restricts mutually;
The 3rd. the mud bacterial classification (nitrogen-fixing bacteria that the utility model is selected, as anaerobic hydrogen-generating bacterial flora) form required thing using nitrogen, phosphorus as its organism, utilize the nitrogen, the phosphorus that absorb to breed growth, therefore mud can be used in the agriculture techniques such as cultivation, fertilising completely, phosphorus is entered in ecological recycle system, not only ensure the reasonable utilization of phosphorus, also avoided secondary pollution problem, produced high economic benefit simultaneously;
The 4th. the utility model is nitrogen-fixing bacteria (as anaerobic hydrogen-generating bacterial flora) action-reaction due to what select, has avoided the required sludge reflux of nitrated-denitrification, and the required energy of anaerobic hydrogen-generating bacterial flora adopts light source to supply with simultaneously, and energy consumption can significantly reduce.
Certainly, implement arbitrary product of the present utility model and might not need to reach above-described all advantages simultaneously.
Brief description of the drawings
Fig. 1 is sludge treating system and the schematic flow sheet of the utility model embodiment.
Embodiment
The utility model is for solving the problem of high nitrogen phosphorus, high-COD waste water treatment process.Show through large quantity research, the nitrogen in sewage and phosphorus are the one of the main reasons that causes receiving water body eutrophication, therefore denitrification dephosphorization technique has become one of the focus of current water pollution control area research and difficult point.The utility model has been set up a set of complete Waste Water Treatment for this problem, replace conventional mud by choosing nitrogen-fixing bacteria flora (anaerobic hydrogen-generating bacterium), make technique reach the effect of synchronous denitrification dephosphorizing and resource recycling, the waste (solid, liquid, waste gas) of simultaneity factor to the form of ownership producing in treating processes all properly disposed, and avoided the secondary pollution problem causing because dealing with improperly.
A kind of Sewage treatment systems of the present utility model, comprising:
Preprocessing subsystem, for waste water being carried out to exhausted bacterium purifying, makes in waste water not containing other bacterial classifications;
Luminous energy fixed nitrogen reactor, for the treatment of pretreated waste water; In described luminous energy fixed nitrogen reactor, there is the anaerobic sludge of exhibiting high surface apposition growth nitrogen-fixing bacteria, and, described luminous energy fixed nitrogen reactor is built-in with light source, in addition, in described luminous energy fixed nitrogen reactor, be also provided with heating unit and the temperature-control device of controlling described luminous energy fixed nitrogen reactor temperature, described luminous energy fixed nitrogen reactor head arranges tail gas collecting device;
Medicament addition device, for adding nutritive substance in described luminous energy fixed nitrogen reactor;
Ultra-filtration equipment, for the treatment of the waste water after described luminous energy fixed nitrogen reactor for treatment, holds back majority of organic pollutants in waste water;
Sewage sludge storage device, for storing through ultra-filtration equipment part excess sludge after treatment.
Concrete facilities and equipments in said apparatus can be determined with prior art as required by those skilled in the art, are not described in detail herein and limit.
Below with specific embodiment, the utility model is further described.
Embodiment 1
Refer to Fig. 1, a kind of Sewage treatment systems and method that the present embodiment provides comprise:
Pretreatment system: Sewage treatment systems leading portion arranges pretreatment system, by the mode purified wastewater of sterilization or ultrafiltration, make to enter in the waste water in reactor containing other bacterial classifications, avoid forming competition, follow-up system mesophytization sludge treatment effect is produced and disturbed; The utility model scheme be to adopt ultrafiltration system or sterilisation system as pretreatment unit, object is for bacterium purifying absolutely, selects a use.Particularly for example, be provided with sterilisation system 01 and water inlet ultrafiltration system 02, wherein sterilisation system 01 is provided with for example ozone generation system 03 of disinfecting substance producer simultaneously, and sterilisation system 01 and water inlet ultrafiltration system 02 are selected a use.
Luminous energy fixed nitrogen reactor 7: the waste water after sterilization or ultrafiltration enters luminous energy fixed nitrogen reactor 7 by the pipeline shown in 04, this luminous energy fixed nitrogen reactor 7 is anaerobe fixed nitrogen reactor, it has an anaerobe fixed nitrogen reaction tank, in this anaerobe fixed nitrogen reaction tank, there is exhibiting high surface apposition growth to have the anaerobic sludge of nitrogen-fixing bacteria (as anaerobic hydrogen-generating bacterium), nitrogen-fixing bacteria group is under the built-in light source of luminous energy fixed nitrogen reactor irradiates, utilize existing pollution substance in waste water, contain C, N, the organism of P carries out growth and breeding and metabolism as matrix, part material is for the synthesis of new cell, surplus materials is converted into inorganics after metabolism, waste water has completed synchronous denitrification dephosphorizing in this course, reduce the process of COD and bacterial multiplication, in luminous energy fixed nitrogen reactor 7, be also provided with steam heating system and temperature alarming Controlling System simultaneously, to ensure that the interior temperature of this reactor 7 can maintain the scope of the above-mentioned nitrogen-fixing bacteria growth of optimum, and improved security of system stability, in addition, because above-mentioned nitrogen-fixing bacteria produces a small amount of hydrogen in metabolic processes, therefore at reactor 7 tops, gas skirt 12 is set, this gas skirt 12 is communicated with tail gas collecting device 13, and the gas after collecting can be used as thermal source and maintains the interior temperature of reactor 7 or directly burning.Be delivered to external placed type ultra-filtration membrane 14 through water pump along passage shown in label 06 through luminous energy fixed nitrogen reactor 7 waste water after treatment.Wherein, specifically in the present embodiment; luminous energy fixed nitrogen reactor 7 is built-in with light source 08; this light source 08 outside is provided with the high strength glass interlayer 09 shielding; and; luminous energy fixed nitrogen reactor 7 tops are provided with triphase separator 11, for waste water after treatment, hydrogen and mud are carried out to three phase separation.
Medicament addition device 10: medicament addition device 10 can, for medicament configuration and throwing device, for add nutritive substance in reactor 7, guarantee that the nutritive substance scale dimension in the interior waste water of reactor 7 is held in the numerical value of the above-mentioned nitrogen-fixing bacteria growth of optimum.In addition, it is good that medicament also can configured in advance, and need in medicament addition device 10, not carry out.
Ultra-filtration equipment 14: ultra-filtration equipment 14 can be external placed type ultrafiltration membrane system, waste water after luminous energy fixed nitrogen reactor 7 anaerobic treatment enters this external placed type ultrafiltration membrane system, the power providing by recycle pump makes waste water under high pressure see through ultra-filtration membrane, make remaining majority of organic pollutants in waste water be retained in ultra-filtration membrane one side formation dope, the ultra-filtration membrane opposite side output stillness of night, reach Effluent criteria.A part that contains the dope of anaerobic sludge after ultrafiltration is that the pipeline shown in 05 is back in the anaerobe fixed nitrogen reaction tank of luminous energy fixed nitrogen reactor 7 and guarantees sludge concentration by label.
Sludge storage pool 15: the part excess sludge after ultrafiltration is collected and is back in sludge storage pool 15 by pipeline, the mud of storage can be that the pipeline shown in 05 is back in the anaerobe fixed nitrogen reaction tank of luminous energy fixed nitrogen reactor 7 for the supplementing of existed system anaerobic sludge by label, or for other newly-built luminous energy fixed nitrogen reactor sludge seeding.
The present embodiment has the following advantages compared with existing A2O technique:
A. the reaction tank volume of existing A2O technique is compared with A/O technique is large and sludge reflux amount is large, energy consumption is high: the returned sluge in technological process all enters anaerobism section, and in order to maintain lower sludge loading to ensure the Nitrification of system, reflux ratio generally need remain between 40%-100%, reaction tank volume is increased greatly, capital cost is raise, also increased the expenses such as its operation and maintenance simultaneously;
Sewage treatment systems of the present utility model only need arrange anaerobism and Aerobic Pond, significantly shortened process, the process of whole denitrogenation dephosphorizing only completes in a reactor simultaneously, and just can reach the effect of denitrogenation dephosphorizing without return-flow system simultaneously, thereby has avoided above-mentioned shortcoming.
B. existing A2O technique Nitrogen/Phosphorus Removal suppresses mutually: in the time that system sludge back flow quantity is larger, a large amount of nitrate also will be carried secretly to anaerobic pond in returned sluge, and polyP bacteria to discharge the condition of phosphorus be anaerobic state simultaneously by the existence of solvability BOD.In the time that a large amount of nitrate exists, denitrifying bacteria can carry out using organism as carbon source denitrification, and the anaerobism that can start phosphorus after waiting denitrogenation completely discharges, and this useful volume that anaerobism of carrying out phosphorus in anaerobic stages is discharged greatly reduces, the effect that reduces dephosphorization, Comparatively speaking denitrification effect is better; Otherwise, if the nitrification in aerobic section is poor, just the nitrate amount entering in anaerobism section with returned sluge reduces, makes phosphorus be able to sufficient anaerobism and discharge, increase its phosphor-removing effect, but due to nitrated not exclusively, cause denitrification effect not good;
And the utility model is owing to having adopted nitrogen-fixing bacteria group as anaerobic treatment section mud, make nitrogen phosphorus in anaerobic pond, carry out synchronism eliminates, avoid two kinds of situations that effect restricts mutually.
C. water treatment system can produce a large amount of phosphorus containing sludges when conventional A2O art breading phosphorus-containing wastewater, and this type of mud and concentrated solution thereof, as mishandling, can again enter natural water and form secondary pollution.And on the other hand, as a very important class material in vital movement, be also the raw material extensively using in industrial production simultaneously, phosphoric is unidirectional in the transfer of occurring in nature, and therefore a large amount of exploitations will cause phosphoric to become gradually a kind of rare resources with use.Therefore traditional technique exists the dual contradiction that causes secondary pollution and the wasting of resources to the disposal of phosphorus containing sludge.
The selected mud bacterial classification of the utility model is nitrogen-fixing bacteria group, it forms required thing using nitrogen, phosphorus as its organism, utilize the nitrogen, the phosphorus that absorb to breed growth, therefore mud can be used in the agriculture techniques such as cultivation, fertilising completely, phosphorus is entered in ecological recycle system, not only ensure the reasonable utilization of phosphorus, also avoided secondary pollution problem, produced high economic benefit simultaneously.
D. conventional A2O technique is to be realized denitrogenation dephosphorizing and removed the effect of COD by nitrated-denitrification process, therefore need the sludge reflux of vast scale and Wind Volume aeration to ensure sludge concentration and oxygen-supplying amount in whole process flow, this increases the energy expenditure in technique.
The utility model is nitrogen-fixing bacteria action-reaction due to what select, does not need the sludge reflux of having avoided nitrated-denitrification required, and the required energy of nitrogen-fixing bacteria adopts light source to supply with simultaneously, and energy consumption can significantly reduce.
Disclosed the utility model preferred embodiment is just for helping to set forth the utility model above.Preferred embodiment does not have all details of detailed descriptionthe, and also not limiting this utility model is only described embodiment.Obviously,, according to the content of this specification sheets, can make many modifications and variations.These embodiment are chosen and specifically described to this specification sheets, is in order to explain better principle of the present utility model and practical application, thereby under making, technical field technician can understand and utilize the utility model well.The utility model is only subject to the restriction of claims and four corner and equivalent.
Claims (7)
1. a Sewage treatment systems, is characterized in that, comprising:
Preprocessing subsystem, for waste water being carried out to exhausted bacterium purifying, makes in waste water not containing other bacterial classifications;
Luminous energy fixed nitrogen reactor, for the treatment of pretreated waste water; In described luminous energy fixed nitrogen reactor, there is the anaerobic sludge of exhibiting high surface apposition growth nitrogen-fixing bacteria, and, described luminous energy fixed nitrogen reactor is built-in with light source, in addition, in described luminous energy fixed nitrogen reactor, be also provided with heating unit and the temperature-control device of controlling described luminous energy fixed nitrogen reactor temperature, described luminous energy fixed nitrogen reactor head arranges tail gas collecting device;
Medicament addition device, for adding nutritive substance in described luminous energy fixed nitrogen reactor;
Ultra-filtration equipment, for the treatment of the waste water after described luminous energy fixed nitrogen reactor for treatment, holds back majority of organic pollutants in waste water;
Sewage sludge storage device, for storing through ultra-filtration equipment part excess sludge after treatment.
2. Sewage treatment systems as claimed in claim 1, is characterized in that, described preprocessing subsystem is sterilization subsystem or ultrafilter system.
3. Sewage treatment systems as claimed in claim 1, is characterized in that, described luminous energy fixed nitrogen reactor comprises an anaerobe fixed nitrogen reaction tank, has the anaerobic sludge of nitrogen-fixing bacteria described in exhibiting high surface apposition growth in described anaerobe fixed nitrogen reaction tank.
4. Sewage treatment systems as claimed in claim 1, is characterized in that, the temperature-control device arranging in described luminous energy fixed nitrogen reactor is temperature alarming control device.
5. Sewage treatment systems as claimed in claim 1 or 2 or 3 or 4, is characterized in that, the heating unit arranging in described luminous energy fixed nitrogen reactor is steam heater.
6. Sewage treatment systems as claimed in claim 1, is characterized in that, described ultra-filtration equipment is external placed type ultra-filtration membrane.
7. Sewage treatment systems as claimed in claim 1, is characterized in that, described sewage sludge storage device is sludge storage pool.
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|---|---|---|---|
| CN201420355076.1U CN203947003U (en) | 2014-06-30 | 2014-06-30 | A kind of Sewage treatment systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671586A (en) * | 2014-06-30 | 2015-06-03 | 上海世渊环保科技有限公司 | Sewage treatment system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671586A (en) * | 2014-06-30 | 2015-06-03 | 上海世渊环保科技有限公司 | Sewage treatment system and method |
| CN104671586B (en) * | 2014-06-30 | 2017-05-03 | 上海世渊环保科技有限公司 | Sewage treatment system and method |
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