CN1896013A - Laminated aerator biological filter pool and its method for pretreat light-pollution primary water - Google Patents
Laminated aerator biological filter pool and its method for pretreat light-pollution primary water Download PDFInfo
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- CN1896013A CN1896013A CNA2006100358820A CN200610035882A CN1896013A CN 1896013 A CN1896013 A CN 1896013A CN A2006100358820 A CNA2006100358820 A CN A2006100358820A CN 200610035882 A CN200610035882 A CN 200610035882A CN 1896013 A CN1896013 A CN 1896013A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
A laminated aeration biological filter pool and its treatment for pre-treatment micro-pollution primary water are disclosed. The laminated aeration biological filter pool consists of settlement pre-aeration biological filter pool and two ascending aeration biological filter pools, pipe corridor with height 3.5-4m and the same cross section area is arranged at bottom of settlement pre-aeration biological filter pool and two ascending aeration biological filter pools are located at both sides of pipe corridor and settlement pre-aeration biological filter pool. The process is carried out by filtering suspended substance, shellfish and algae in primary water by large-particular filter material of settlement pre-aeration biological filter pool and removing ammonia-nitrogen, organic substance, algae and split biological membrane under double-action of biological membrane and small-particular filter material in ascending aeration biological filter pool. It is cheap, has better space utilization ratio and purification efficiency and saves energy source. It can be used for micro-pollution water supply biological pre-treatment.
Description
Technical field
The present invention relates to water supply purification (micro-polluted raw pre-treatment) field, specifically relate to the folded formula BAF and the method thereof of pre-treatment feedwater.
Background technology
BAF, be beginning of the nineties late 1980s on the basis of ordinary biofilter, use for reference water-feeding leaching pool technology and the biomembrance process New Process for Treatment developed, be used for the tertiary treatment of sewage at first, after develop into and can be directly used in second-stage treatment.This technology adopts the particulate filler of high-specific surface area as biofilm carrier, its outstanding characteristics are that biomass is many, hydraulic load is big, hydraulic detention time is short, the coefficient of oxygen utilization height, organic pollutant removal rate height, organonitrogen and ammonia nitrogen can be nitrated fully, the function that has the cut-off filter suspended substance does not again need to establish the microbial film settling tank again.Therefore, BAF is a kind of efficient height, take up an area of less, reduced investment, energy consumption are low, reliable, the water-purifying process that level of automation height, effluent quality be good, have the large development potentiality.At present, the exploitation of biological aerated filter process technology all is as target with sewage disposal.Along with China's Urban water supply and international standard integrate with, and the drinking water source organic contamination is general serious, press for and in " coagulation-precipitation-sand filtration-sterilization " city water treatment process of routine, introduce feedwater biological pre-treatment process technology, organism in the former water and ammonia nitrogen are handled the drinking water source water quality standard that reaches.City water Biological Pretreatment expectation biological aerated filter process technology, but there are marked difference in the secondary of Biological Pretreatment of Polluted Raw Water and sewage or tertiary treatment aspect water quality, be specially: (1) former water contains plurality of impurities and hydrobionts such as algae and shellfish, need take measures to prevent that filter from stopping up; (2) organic pollutant of former water and ammonia nitrogen concentration compare with sewage much lower, the hydraulic load that suitable employing is bigger; (3) raw water quality is stable like municipal effluent, and often with the noticeable change in season: the Pollutant levels of spring and summer wet season are low and water temperature is high, organism be easy to remove and oxygen requirement low; The organism in low water season autumn and winter and ammonia nitrogen concentration height and temperature are low, and oxygen requirement is several times of wet season.So blast aeration system that need adapt with it; (4) pre-treatment of former water is determined water quality objective with water environment quality standard usually, and ratio sewage is handled much strict.Therefore, directly adopt the sewage aeration biological filtering tank process can not obtain gratifying effect, this also is not see that so far the city water Biological Pretreatment adopts the reason of biological aerated filter process.
The BAF structure is similar to conventional rapid filter, but has increased aerating system, can be divided into flow lifting type and fall two kinds of forms of streaming BAF by water (flow) direction.Early stage application mostly is falls streaming, and along with the advantage of flow lifting type is admitted, flow lifting type technology is adopted in sewage disposal substantially.
Impurity and grow hydrobiont and stop up filter in the water has domesticly seen that the engineering test of streaming water supply aerating biological filter falls in direct employing.But because the hydraulic load of city water BAF 1.5～2 times of sewage aeration biological filter often, and fall under the streaming current direction and aeration gas flow upwards forms reverse flow, strengthening the head loss that hydraulic load caused significantly increases, so that streaming falls in employing is improper.Flow lifting type air water concurrent, in the aqueous vapor uphill process, can bring the SS that hold back the bottom into the middle and upper part, filter tank, increase the water environment capacity in filter tank, prolong the work period, but the water and air distributing strainer head of bottom, filter tank is easily stopped up by impurity or the hydrobiont that grows, need carry out strict pre-treatment.The one-level processing is carried out with " fine fack-settling pit-settling tank-ultra-fine grid " technology usually in the sewage aeration biological filter that is used for second-stage treatment, can either prevent that impurity stops up water distribution system in the sealing, reduces concentration of suspension again, prolongs backwashing period.If the pretreatment unit that the water supply aerating biological filter process using is identical, then not only floor space is excessive relatively, also may not effectively stop hydrobionts such as shellfish and algae to penetrate, and natural subsidence is not high to the clearance of micro-polluted raw turbidity, when raw water turbidity is higher, to cause the head loss of water supply aerating biological filter to increase comparatively fast, be unfavorable for adopting concentrated blast aeration system.
The biofilm development of sewage aeration biological filter is fast, and head loss changes greatly, is the influence that the aeration that makes each filter tank is not changed by head, and every sewage aeration biological filter all disposes gas blower separately, forms independently aerating system.If water supply aerating biological filter adopts identical aeration mode will be unfavorable for energy-conservation, this is because the Various Seasonal oxygen requirement differs several times, even adopt the frequency conversion gas blower also to be difficult in efficient section operation, and the investment of blast apparatus and maintenance management workload thereof enlarge markedly, thereby lose technical superiority.
Summary of the invention
The objective of the invention is to overcome the existing BAF above-mentioned technological deficiency that Biological Pretreatment exists that is applied to feed water, provide a kind of to micro-polluted raw organism and ammonia nitrogen purification efficiency height, take up an area of less, the folded formula BAF and the method thereof of cost is low and working cost is low pre-treatment feedwater.
Central Plains of the present invention water is that feeding water is the daily life water without the pretreated water supply source that has little pollution.
Purpose of the present invention is achieved through the following technical solutions:
As Fig. 1, shown in 2, the folded formula BAF of pretreating micro-polluted raw water, comprise that streaming preaeration biological filter and two second stage flow lifting type BAF fall in a first step, below streaming preaeration biological filter body 1 falls in the first step, be provided with one identical with its cross-sectional area, it highly is the piping lane 26 of 3.5～4m, two second stage flow lifting type BAF are positioned at the both sides that streaming preaeration biological filter body 1 falls in piping lane 26 and the first step, and the first step is fallen streaming preaeration biological filter and is connected with the water and air distributing trough 19 of two second stage flow lifting type BAF respectively by the rising pipe 11 that is positioned at piping lane 26.
For further realizing the object of the invention, useful is:
The described first step is fallen streaming preaeration biological filter and is comprised total inlet channel 3, distributing trough 4, first step BAF body 1, macrobead filtrate 7, cobble bed course 8, strainer head 9, water and air distributing water leg 10 and rising pipe 11; Total inlet channel 3 is positioned at the upper outside of falling streaming preaeration biological filter body 1 and is connected with the distributing trough 4 of first step BAF body 1 internal upper part, be provided with macrobead filtrate 7, cobble bed course 8 and strainer head 9 and water and air distributing water leg 10 in the first step BAF body 1 from top to bottom, water and air distributing water leg 10 is connected with rising pipe 11.
Described second stage flow lifting type BAF comprises second stage flow lifting type BAF body 14, water and air distributing trough 19, strainer head 16, cobble bed course 25, small-particle filtrate 24, aeration blower 29, aeration tube 15, effluent trough 22, rising pipe 23, described water and air distributing trough 19 is communicated with second stage flow lifting type BAF body 14, be respectively equipped with strainer head 16 from top to bottom in the second stage flow lifting type BAF body 14, cobble bed course 25 and small-particle filtrate 24, be provided with aeration tube 15 in the cobble bed course 25, aeration tube 15 is connected with aeration blower 29, flow lifting type BAF body 14 upper ends, the second stage are connected with the effluent trough 22 that is positioned at its upper outside, and effluent trough 22 is connected with rising pipe 23.
The described first step is fallen streaming preaeration biological filter and is provided with back-purge system, comprise back flushing inlet pipe 12, back flushing water inlet pipe 13, backwash pump 27, back flushing gas blower 28, back flushing drainage tray 6 and back flushing water shoot 5, described back flushing gas blower 28 is connected with back flushing water inlet pipe 13 with back flushing inlet pipe 12 respectively with wash-water pump 27, the back flushing inlet pipe 12 that is located at piping lane 26 upper ends is connected with water and air distributing water leg 10 respectively with back flushing water inlet pipe 13, and the back flushing drainage tray 6 that is located at first step BAF body 1 upper end is connected with back flushing water shoot 5.
Described second stage flow lifting type BAF is provided with back-purge system, comprise back flushing inlet pipe 17, back flushing water inlet pipe 18, backwash pump 27, back flushing gas blower 28, back flushing drainage tray 21 and back flushing water shoot 20, described back flushing gas blower 28 is connected with back flushing water inlet pipe 18 with the back flushing inlet pipe 17 that is located at piping lane 26 interior lower ends respectively with wash-water pump 27, back flushing inlet pipe 17 is connected with water and air distributing trough 19 respectively with back flushing water inlet pipe 18, the back flushing drainage tray 21 that is located at the outside, BAF body 14 upper ends, the second stage is connected with second stage BAF body 14, and is connected with back flushing water shoot 20.
Use the method for folded formula BAF pretreating micro-polluted raw water of the present invention: the former water of preaeration inserts total inlet channel 3 from water inlet manifold 2, fall the distributing trough 4 of streaming preaeration biological filter through the first step and allocate first step BAF body 1 into, and flow downward, through placing the first step to fall suspended impurity and the turbidity and the hydrobionts such as shellfish and algae of the former water of macrobead filtrate 7 cut-off filters in the streaming preaeration biological filter body 1, the microbial film of growth carries out ammonification to organonitrogen in the former water on macrobead filtrate 7 and the cobble bed course 8 simultaneously, remove part ammonia nitrogen and organism; Subsequently, falling the water of handling streaming preaeration biological filter through the first step collects by water and air distributing water leg 10, enter the water and air distributing trough 19 of second stage flow lifting type BAF from rising pipe 11, allocate into then in the second stage flow lifting type BAF body 14, and upwards flow; In placing cobble bed course 25, carry out aeration continuously by a plurality of aerators on the aeration tube 15 of aeration blower 29 air feed, the microbial film of growth obtains sufficient dissolved oxygen on cobble bed course 25 and the small-particle filtrate 24, water is under biomembrane biochemistry and small-particle filtrate 24 cut-off filter dual functions, remove ammonia nitrogen, organism, turbidity and algae in the water and the microbial film that comes off, the water after the purification flow to rising pipe 23 from effluent trough 22 and flows out.Feedwater at last enters conventional processing system of water factory.
Principle of the present invention: fall streaming preaeration biological filter with the first step and replace settling tank as pre-treatment, owing to adopt macrobead filtrate and not direct aeration, increased substantially the filtering velocity of falling the streaming filter tank, its hydraulic load reaches about 2 times of tube settler, impurity in turbidity and the water and hydrobiological clearance then are higher than tube settler and grid, can effectively prevent impurity and hydrobiont obstruction filter in the sealing.The first step is fallen streaming preaeration biological filter and is also had the biological treatment function, and the microbial film of macrobead filter material surface utilizes former water preaeration that dissolved oxygen is provided, and it is nitrated to carry out organic matter degradation, organonitrogen ammonification and ammonia nitrogen.Because the microbial growth of micro-polluted raw is slow, the increase of the head loss of second stage flow lifting type BAF mainly is that biofloculation removal turbidity causes, raising first step filter tank can make the head loss variation before and after back flushing of filter tank, the second stage very little to the clearance of turbidity, and this is the precondition that adopts the blast aeration system of concentrating and don't can cause aeration inequality between each filter tank.Adopt the aerating system of concentrating, not only can significantly reduce air blast board number and increase standby, can also simply and effectively regulate air demand by opening air blast board number,, avoid complicated conservation measures with the seasonal variation that adapts to raw water quality different needs to air demand.The current of second stage flow lifting type BAF are upward flow, because big impurity and hydrobiont is removed in first step filter tank in the water, so generally can not stop up the water and air distributing strainer head of second stage flow lifting type BAF.The surface-area that second stage small-particle filtrate is huge is that the mass transfer and the water supply purification of biomembranous growth, organism and ammonia nitrogen and dissolved oxygen created necessary condition.
The present invention compared with prior art has following advantage and beneficial effect:
1, the present invention is to micro-polluted raw organism and ammonia nitrogen purification efficiency height, and the Biological Pretreatment that can realize feeding water is improved the target of raw water quality.
2, folded formula BAF is applied to the micro-polluted raw pre-treatment and can gives full play to the first step and fall streaming preaeration biological filter and second stage flow lifting type BAF characteristics separately, can avoid former water impurity to stop up filter, have bigger hydraulic load and ammonia nitrogen volumetric loading again.
3, the present invention adopts concentrated gas blower airing system and can not cause aeration inequality between each filter tank, not only significantly reduce air blast board number and increase standby, save great deal of investment, reduce the equipment maintenance and management workload, improve serviceability, can also avoid adopting complicated conservation measures by adjusting gas blower operation platform number to adapt to the different needs of raw water quality seasonal variation to air demand, working cost also significantly reduces.
4, first step of the present invention is fallen streaming preaeration biological filter and is positioned at flow lifting type BAF centre, two second stage and common wall formation " product " font structure, space between three filter tanks is used to arrange various pipelines and valve and equipment as three filter tank common piping lanes.Not only be convenient to maintenance management, also can significantly save and take up an area of and the reduction cost.
5, the first step of the present invention is fallen streaming preaeration biological filter and directly is connected with second stage flow lifting type BAF, integral body is carried out water distribution and distribution, integral body is carried out back flushing step by step, both can avoid increasing the head loss of water distribution link, is easy to realize automatic control again.
Description of drawings
Fig. 1 is the folded formula BAF structural representation of the present invention.
Fig. 2 be among Fig. 1 A-A to sectional view.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described, but embodiments of the invention are not limited thereto.
As shown in Figure 1, 2, the folded formula BAF of pretreating micro-polluted raw water, comprise that streaming preaeration biological filter and two second stage flow lifting type BAF fall in a first step, below streaming preaeration biological filter body 1 falls in the first step, be provided with one identical with its cross-sectional area, it highly is the piping lane 26 of 3.5～4m, two second stage flow lifting type BAF are positioned at the both sides that streaming preaeration biological filter body 1 falls in piping lane 26 and the first step, and above-mentioned three filter tank bodies constitute " product " font structures with piping lane 26; The first step is fallen streaming preaeration biological filter and is connected with the water and air distributing trough 19 of two second stage flow lifting type BAF respectively by the rising pipe 11 that is positioned at piping lane 26.
Among Fig. 1,2, the first step is fallen streaming preaeration biological filter and is comprised total inlet channel 3, distributing trough 4, first step BAF body 1, macrobead filtrate 7, cobble bed course 8, strainer head 9, water and air distributing water leg 10 and rising pipe 11; Total inlet channel 3 is arranged in the upper outside of falling streaming preaeration biological filter body 1, be connected with the distributing trough 4 of first step BAF body 1 internal upper part, be provided with macrobead filtrate 7, cobble bed course 8 and strainer head 9 and water and air distributing water leg 10 in the first step BAF body 1 from top to bottom, water and air distributing water leg 10 is connected with rising pipe 11, and water distribution water leg 10 belows are piping lane 26.The first step is fallen streaming preaeration biological filter and also is provided with back-purge system, comprise back flushing inlet pipe 12, back flushing water inlet pipe 13, backwash pump 27, back flushing gas blower 28, back flushing drainage tray 6 and back flushing water shoot 5, described back flushing gas blower 28 is connected with back flushing water inlet pipe 13 with back flushing inlet pipe 12 respectively with wash-water pump 27, the back flushing inlet pipe 12 that is located at piping lane 26 upper ends is connected with water and air distributing water leg 10 respectively with back flushing water inlet pipe 13, the back flushing drainage tray 6 that is located at first step BAF body 1 upper end is connected with back flushing water shoot 5, and back flushing drainage tray 6 two ends are connected on two inboards, BAF body 1 upper end.
Fig. 1, in 2, second stage flow lifting type BAF comprises second stage flow lifting type BAF body 14, water and air distributing trough 19, strainer head 16, cobble bed course 25, small-particle filtrate 24, aeration blower 29 (two same aeration blowers of second stage flow lifting type BAF aerating apparatus), aeration tube 15, effluent trough 22, rising pipe 23, described water and air distributing trough 19 is communicated with second stage flow lifting type BAF body 14, be respectively equipped with strainer head 16 from top to bottom in the second stage flow lifting type BAF body 14, cobble bed course 25 and small-particle filtrate 24, be provided with aeration tube 15 in the cobble bed course 25, aeration tube 15 is connected with aeration blower 29, flow lifting type BAF body 14 upper ends, the second stage are connected with the effluent trough 22 that is positioned at its upper outside, and effluent trough 22 is connected with rising pipe 23.Second stage flow lifting type BAF is provided with back-purge system, comprise back flushing inlet pipe 17, back flushing water inlet pipe 18, backwash pump 27 (same backwash pump in the back-purge system of streaming preaeration biological filter falls in the first step), back flushing gas blower 28 (same back flushing gas blower in the back-purge system of streaming preaeration biological filter falls in the first step), back flushing drainage tray 21 and back flushing water shoot 20, described back flushing gas blower 28 is connected with back flushing water inlet pipe 18 with the back flushing inlet pipe 17 that is located at piping lane 26 interior lower ends respectively with wash-water pump 27, back flushing inlet pipe 17 is connected with water and air distributing trough 19 respectively with back flushing water inlet pipe 18, the back flushing drainage tray 21 that is located at the outside, BAF body 14 upper ends, the second stage is connected with second stage BAF body 14, and is connected with back flushing water shoot 20.
When using folded formula BAF pretreating micro-polluted raw water of the present invention, the former water of preaeration inserts total inlet channel 3 from water inlet manifold 2, and the distributing trough 4 that falls streaming preaeration biological filter through the first step is allocated first step BAF body 1 into and flowed downward; Place the first step to fall suspended impurity and the turbidity and the hydrobionts such as shellfish and algae of the former water of macrobead filtrate 7 cut-off filters in the streaming preaeration biological filter body 1, in order to avoid stop up filter; The microbial film of growth carries out ammonification, removes part ammonia nitrogen and organism organonitrogen on macrobead filtrate 7 and the cobble bed course 8; The first step is fallen streaming preaeration biological filter treating water through 10 collections of water and air distributing water leg, enters the water and air distributing trough 19 of second stage flow lifting type BAF from rising pipe 11, allocates into then in the second stage flow lifting type BAF body 14 and flows to last; Place aeration tube 15 in the cobble bed course 25 by aeration blower 29 air feed, carry out aeration continuously, for the microbial film of growth on cobble bed course 25 and the small-particle filtrate 24 provides sufficient dissolved oxygen by a plurality of aerators on the aeration tube 15; Under biomembrane biochemistry and small-particle filtrate 24 cut-off filter dual functions, remove ammonia nitrogen, organism, turbidity and algae in the water and the microbial film that comes off, the water after the purification flow to rising pipe 23 from effluent trough 22, enters conventional processing system of water factory.
During folded formula BAF pretreating micro-polluted raw water of the present invention, fall in the streaming preaeration biological filter not aeration in the first step, utilize the oxygenation of prime aerated grit chamber, the highest first step filter tank water inlet dissolved oxygen that can make is near saturated.Second stage flow lifting type BAF is carried out aeration by the aeration blower of concentrating 29, by opening 29 numbers adjustings of gas blower air demand, with the seasonal variation that the adapts to raw water quality different needs to air demand.
Fall streaming preaeration biological filter head loss when reaching design load when the first step, open the valve of back flushing water shoot 5 and the valve of back flushing water shoot 20, close the valve of rising pipe 11, the 5 beginning drainings of back flushing water shoot.Open the valve of back flushing inlet pipe 12, drive back flushing gas blower 28 then, the back flushing air is gone into the pond through inlet pipe 12, by water and air distributing water leg 10 and strainer head 8 uniform distribution.Macrobead filter material surface aged microbial film comes off under the strong friction of air-flow.After several minutes, close the back flushing air valve, open the valve and the backwash pump 27 of back flushing water inlet pipe 13, backwashing water is gone into the pond through water inlet pipe 13, by water and air distributing water leg 10 and strainer head 8 uniform distribution, the impurity that accumulates in the filtering layer and the microbial film that comes off etc. is discharged through back flushing drainage tray 6 and washback drainpipe 5 with wash-down water, enter sludge treating system.After several minutes, close the valve of back flushing water inlet pipe 13, first step filter back washing finishes.
The first step is fallen streaming preaeration biological filter when closing the valve of back flushing inlet pipe 12, open the valve of one backwash gas inlet pipe 17 in the flow lifting type BAF of the second stage in advance, the back flushing air is gone into the pond through inlet pipe 17, by water and air distributing trough 19 and strainer head 26 uniform distribution.Filter material surface aged microbial film comes off under the strong friction of air-flow.After several minutes, close the valve of back flushing inlet pipe 17, open the valve of back flushing water inlet pipe 18, backwashing water is gone into the pond through water inlet pipe 18, by water and air distributing trough 19 and strainer head 26 uniform distribution, the microbial film that comes off in the filtering layer is discharged through back flushing drainage tray 21 and washback drainpipe 20 with wash-down water, enter sludge treating system.After several minutes, close the valve of back flushing water inlet pipe 18, the back flushing that second stage flow lifting type BAF is finishes.
In the flow lifting type BAF of the second stage during valve of closing back flushing inlet pipe 17, open another the valve of backwash gas inlet pipe 17 of second stage flow lifting type BAF in advance, the back flushing air is gone into the pond through inlet pipe 17, by water and air distributing trough 19 and strainer head 16 uniform distribution.Filter material surface aged microbial film comes off under the strong friction of air-flow.After several minutes, stop back flushing gas blower 28, close the valve of back flushing inlet pipe 17, open the valve of back flushing water inlet pipe 18, backwashing water is gone into the pond through water inlet pipe 18, by water and air distributing trough 19 and strainer head 16 uniform distribution, the microbial film that comes off in the filtering layer is discharged through back flushing drainage tray 21 and washback drainpipe 20 with wash-down water, enter sludge treating system.After several minutes, stop backwash pump 27, close the valve of back flushing water inlet pipe 18, flow lifting type BAF another back flushing in the second stage finishes.
When flow lifting type BAF another back flushing in the second stage finishes, close the valve of back flushing water shoot 5 and the valve of back flushing water shoot 20, open the valve that streaming preaeration biological filter rising pipe 11 falls in the first step, then this overlapping type BAF is finished back flushing, normal operation input.Because backwashing time is not long, water inlet and aeration do not stop during the back flushing, and aeration helps improving backwash effect.
The folded formula BAF of the present invention adopts " product " font to arrange, and streaming preaeration biological filter is fallen in a first step be arranged in central authorities, two flow lifting type BAF apportion both sides, the second stage, the two-stage filter tank can be total to wall.BAF needs bigger piping lane, because falling in the first step, streaming preaeration biological filter need provide filtering cloth head about 1.5m for filter tank, the second stage, and the first step is fallen the filtrate thickness of streaming preaeration biological filter than the little 2～2.5m in second stage filter tank, so at the bottom of the flow lifting type BAF of the second stage, differ about 3.5～4m at the bottom of streaming preaeration biological filter falls in the first step, just in time as three filter tank common piping lanes, effectively utilized the space, also can significantly save and take up an area of and the reduction cost.Folded formula BAF integral body is carried out water distribution and distribution, and inlet and outlet pipe lines directly is connected, and has also significantly reduced head loss.Folded formula BAF integral body is carried out back flushing step by step, switches by valve and avoids back flushing blower fan and water pump frequently to open, and whole-process automatic control has reduced the operational administrative workload.Utilize the folded formula BAF of the present invention to pretreating micro-polluted raw water, organism and ammonia nitrogen purification efficiency height in the former water, the Biological Pretreatment that can realize feeding water is improved the target of raw water quality.
Claims (6)
1, the folded formula BAF of pretreating micro-polluted raw water, it is characterized in that: comprise that streaming preaeration biological filter and two second stage flow lifting type BAF fall in a first step, the first step fall streaming preaeration biological filter body (1) below be provided with one identical with its cross-sectional area, it highly is the piping lane (26) of 3.5～4m, two second stage flow lifting type BAF are positioned at the both sides that streaming preaeration biological filter body (1) falls in piping lane (26) and the first step, and the first step is fallen streaming preaeration biological filter and is connected with the water and air distributing trough (19) of two second stage flow lifting type BAF respectively by the rising pipe (11) that is positioned at piping lane (26).
2, according to the folded formula BAF of the described pretreating micro-polluted raw water of claim 1, it is characterized in that, the described first step is fallen streaming preaeration biological filter and is comprised total inlet channel (3), distributing trough (4), first step BAF body (1), macrobead filtrate (7), cobble bed course (8), strainer head (9), water and air distributing water leg (10) and rising pipe (11); Total inlet channel (3) is positioned at the upper outside of falling streaming preaeration biological filter body (1) and is connected with the distributing trough (4) of first step BAF body (1) internal upper part, be provided with macrobead filtrate (7), cobble bed course (8) and strainer head (9) and water and air distributing water leg (10) in the first step BAF body (1) from top to bottom, water and air distributing water leg (10) is connected with rising pipe (11).
3, folded formula BAF according to the described pretreating micro-polluted raw water of claim 1, it is characterized in that, described second stage flow lifting type BAF comprises second stage flow lifting type BAF body (14), water and air distributing trough (19), strainer head (16), cobble bed course (25), small-particle filtrate (24), aeration blower (29), aeration tube (15), effluent trough (22), rising pipe (23), described water and air distributing trough (19) is communicated with second stage flow lifting type BAF body (14), be respectively equipped with strainer head (16) in the second stage flow lifting type BAF body (14) from top to bottom, cobble bed course (25) and small-particle filtrate (24), be provided with aeration tube (15) in the cobble bed course (25), aeration tube (15) is connected with aeration blower (29), second stage flow lifting type BAF body (14) upper end is connected with the effluent trough that is positioned at its upper outside (22), and effluent trough (22) is connected with rising pipe (23).
4, folded formula BAF according to claim 1 or 2 described pretreating micro-polluted raw waters, it is characterized in that, the described first step is fallen streaming preaeration biological filter and is provided with back-purge system, comprise back flushing inlet pipe (12), back flushing water inlet pipe (13), backwash pump (27), back flushing gas blower (28), back flushing drainage tray (6) and back flushing water shoot (5), described back flushing gas blower (28) is connected with back flushing water inlet pipe (13) with back flushing inlet pipe (12) respectively with wash-water pump (27), the back flushing inlet pipe (12) that is located at piping lane (26) upper end is connected with water and air distributing water leg (10) respectively with back flushing water inlet pipe (13), and the back flushing drainage tray (6) that is located at first step BAF body (1) upper end is connected with back flushing water shoot (5).
5, folded formula BAF according to claim 1 or 3 described pretreating micro-polluted raw waters, it is characterized in that, described second stage flow lifting type BAF is provided with back-purge system, comprise back flushing inlet pipe (17), back flushing water inlet pipe (18), backwash pump (27), back flushing gas blower (28), back flushing drainage tray (21) and back flushing water shoot (20), described back flushing gas blower (28) is connected with back flushing water inlet pipe (18) with the back flushing inlet pipe (17) that is located at the interior lower end of piping lane (26) respectively with wash-water pump (27), back flushing inlet pipe (17) is connected with water and air distributing trough (19) respectively with back flushing water inlet pipe (18), the back flushing drainage tray (21) that is located at the outside, second stage BAF body (14) upper end is connected with second stage BAF body (14), and is connected with back flushing water shoot (20).
6, application rights requires the method for 1 described folded formula BAF pretreating micro-polluted raw water, it is characterized in that, the former water of preaeration inserts total inlet channel (3) from water inlet manifold (2), fall the distributing trough (4) of streaming preaeration biological filter through the first step and allocate first step BAF body (1) into, and flow downward, through placing the first step to fall suspended impurity and the turbidity and the hydrobionts such as shellfish and algae of the former water of macrobead filtrate (7) cut-off filter in the streaming preaeration biological filter body (1), the microbial film that while macrobead filtrate (7) and cobble bed course (8) are gone up growth carries out ammonification to organonitrogen in the former water, remove part ammonia nitrogen and organism; Subsequently, falling the water of handling streaming preaeration biological filter through the first step collects by water and air distributing water leg (10), enter the water and air distributing trough (19) of second stage flow lifting type BAF from rising pipe (11), allocate into then in the second stage flow lifting type BAF body (14), and upwards flow; In placing cobble bed course (25), carry out aeration continuously by a plurality of aerators on the aeration tube (15) of aeration blower (29) air feed, the microbial film that cobble bed course (25) and small-particle filtrate (24) are gone up growth obtains sufficient dissolved oxygen, water is under biomembrane biochemistry and small-particle filtrate (24) cut-off filter dual function, remove ammonia nitrogen, organism, turbidity and algae in the water and the microbial film that comes off, the water after the purification flow to rising pipe (23) from effluent trough (22) and flows out.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100358820A CN100513327C (en) | 2006-06-09 | 2006-06-09 | Laminated aerator biological filter pool and its method for pretreat light-pollution primary water |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100358820A CN100513327C (en) | 2006-06-09 | 2006-06-09 | Laminated aerator biological filter pool and its method for pretreat light-pollution primary water |
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| Publication Number | Publication Date |
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| CN1896013A true CN1896013A (en) | 2007-01-17 |
| CN100513327C CN100513327C (en) | 2009-07-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465107C (en) * | 2007-03-30 | 2009-03-04 | 南京大学 | Aeration bio filter in U shaped flow |
| CN101708891B (en) * | 2009-10-31 | 2011-08-17 | 华南理工大学 | Aerated biological activated carbon filters and method of applying same to purify feed water |
| CN108996850A (en) * | 2018-09-11 | 2018-12-14 | 安徽亚泰环境工程技术有限公司 | A kind of multidirectional stream biofiltration device |
| CN114225562A (en) * | 2022-02-28 | 2022-03-25 | 北京清源华建环境科技有限公司 | Rainwater rapid filtration device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5853578A (en) * | 1996-07-10 | 1998-12-29 | Flyaks; Nina | Method for biological purification of liquids and biological filter for purification of liquids |
| CN2611359Y (en) * | 2003-02-17 | 2004-04-14 | 魏志文 | Combined two-way stream aerating biological filter chamber unit |
| CN2701851Y (en) * | 2004-05-24 | 2005-05-25 | 刘飞 | Diversion aeration biological filter |
| CN2915844Y (en) * | 2006-06-09 | 2007-06-27 | 华南理工大学 | Cascade type aerating biological filter pool |
-
2006
- 2006-06-09 CN CNB2006100358820A patent/CN100513327C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465107C (en) * | 2007-03-30 | 2009-03-04 | 南京大学 | Aeration bio filter in U shaped flow |
| CN101708891B (en) * | 2009-10-31 | 2011-08-17 | 华南理工大学 | Aerated biological activated carbon filters and method of applying same to purify feed water |
| CN108996850A (en) * | 2018-09-11 | 2018-12-14 | 安徽亚泰环境工程技术有限公司 | A kind of multidirectional stream biofiltration device |
| CN108996850B (en) * | 2018-09-11 | 2023-11-07 | 安徽亚泰环境工程技术有限公司 | Multidirectional flow biological filter device |
| CN114225562A (en) * | 2022-02-28 | 2022-03-25 | 北京清源华建环境科技有限公司 | Rainwater rapid filtration device |
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| Publication number | Publication date |
|---|---|
| CN100513327C (en) | 2009-07-15 |
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