CN105271520A - Annular biological aerated filter and application thereof - Google Patents
Annular biological aerated filter and application thereof Download PDFInfo
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- CN105271520A CN105271520A CN201510589735.7A CN201510589735A CN105271520A CN 105271520 A CN105271520 A CN 105271520A CN 201510589735 A CN201510589735 A CN 201510589735A CN 105271520 A CN105271520 A CN 105271520A
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Abstract
The present invention relates to the technical field of sewage treatment, and discloses an annular biological aerated filter including a first filter (3) and a second filter; a second filter is provided with a separator (44), the second filter is divided by the separator (44) into an anoxic filter (41), a first aerobic filter (42) and a second aerobic filter (43), the first filter and a water inlet (311) are connected, the first filter (3) is communicated with the anoxic filter (41), the anoxic filter (41), the first aerobic filter (42) and the second aerobic filter (43) are successively in series connection, and the second aerobic filter (43) is provided with an outlet. The present invention also discloses application of the annular biological aerated filter, and anaerobic, anoxic and aerobic environments exist simultaneously in the annular biological aerated filter to achieve simultaneous nitrification and denitrification. Anaerobic zone breaks down organic matters, removes most of the COD and BOD, and reduces ammonia nitrogen content in effluent. The water flow in the second filter down and up alternately flows to fully contact with a biofilm on the filler surface for interception, adsorption, oxidation decomposition or conversion processing of wastewater suspended solids, organic matters, nitrogen and phosphorus and other nutrients to obtain discharged water meeting emissions standards.
Description
Technical field
The present invention relates to technical field of sewage, relate to annular BAF, particularly relate to the application of annular BAF.
Background technology
BAF is a kind of Novel sewage New Process for Treatment developed on the basis of ordinary biofilter beginning of the nineties late 1980s.Existing biological filter has following shortcoming: along water inlet direction, due to the continuous minimizing of organism and dissolved oxygen, biomass also constantly reduces, so organic clearance also constantly reduces, greatly reduces the processing efficiency of organic pollutant.The short flow phenomenon of easy generation, and filter tank easily blocks.
Summary of the invention
The present invention is directed to the shortcoming of prior art, disclose annular BAF, also disclose the application of annular BAF.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
Annular BAF, comprise round shape pond body, round shape pond body is provided with concentric cylinder and round shape pond body is divided into the first filter tank and the second filter tank from inside to outside successively; First filter tank is the first anaerobic filter; Second filter tank is provided with dividing plate, second filter tank is divided into anoxic filter tank, the first aerobic filter tank and the second aerobic filter tank by dividing plate, first filter tank is connected with water-in, first filter tank communicates with anoxic filter tank, connect successively in anoxic filter tank, the first aerobic filter tank and the second aerobic filter tank, the second aerobic filter tank is provided with outlet.
Anaerobism, anoxic and aerobic three grades of BAF are integrated in a double-layered cylinder pond body by the present invention, anaerobic zone main decomposition organism, remove most COD, BOD; Reduce the ammonia-nitrogen content of water outlet simultaneously.But exist because filter tank spatially belongs to anaerobism, anoxic and aerobic environment simultaneously, and aeration rate can also be regulated to cultivate aerobic denitrifying bacteria and nitrification bacteria, realize synchronous nitration and denitrification.
Anoxic filter tank, the first aerobic filter tank and the second aerobic filter tank water (flow) direction are upward flowing type, lower to streaming and upward flowing type successively.During operation, current are upper and lower to alternately flowing, fully contact, retained by the nutritive elements such as the suspended substance in sewage, organism and nitrogen phosphorus, adsorb, oxygenolysis or conversion processing with the microbial film of filling surface, obtain the water outlet meeting emission standard.Whole equipment is applied widely, treatment effect good, convenient operation and management, and surplus sludge volume is few, takes up an area little, and invest little, running expense is low, little on the impact of surrounding environment.
The filler of corresponding size grading is loaded in filter tank, each district, ss suspended solid in water is also reduced, and reach emission request, water after process is flowed out by the rising pipe at the second top, aerobic filter tank, part effluent recycling to anaerobic zone, according to the size of discharge of sewage variable valve and to control sewage backflow ratio be 0.5.At filler end, utilize dephosphorization filler, realize the synchronous qualified discharge of nitrogen, phosphorus.
As preferably, the first filter tank open top, the first filter tank is provided with distributing trough, the first packing layer and the first supporting layer from top to bottom successively, and the first packing layer is provided with anerobe, is provided with the first water hole bottom the first filter tank.Below the filler in each filter tank, be provided with supporting layer, support the various pipelines bottom the body of each pond.Be easy to blocking in order to avoid biological filter, shorten the problem of pressure cycle, the anaerobic zone of equipment nexine can retain fraction solids suspended substance, reduces the SS entering BAF aerobic section, the cycle of operation of extension reactor; Meanwhile, utilize the anaerobion of anaerobic zone filter material surface, the macromolecule organic of difficult degradation can be hydrolyzed into the small organic molecule of easily degraded, improve the biodegradability of sewage.
As preferably, be provided with the first blow-down pipe bottom the first filter tank, the first filter tank upper inner is provided with back flushing drainage tray, and back flushing drainage tray is connected with back flushing water shoot.
As preferably, the first filter tank is communicated with anoxic filter tank by the first water hole.
As preferably, the top in anoxic filter tank communicates with the top in the first aerobic filter tank, and the bottom in the first aerobic filter tank communicates with the bottom in the second aerobic filter tank.
As preferably, top, anoxic filter tank is provided with the first overflow weir, and anoxic filter tank connects the first aerobic filter tank by the first overflow weir; Be provided with the second water hole bottom first aerobic filter tank, the first aerobic filter tank connects the second aerobic filter tank by the second water hole, is provided with outlet slot on the upside of the second aerobic filter tank.
As preferably, the second filter tank comprises the second packing layer, be located at catch net on the upside of the second packing layer, be located at the second supporting layer on the downside of the second packing layer; Equal load aerobic microbiological on second packing layer in the first aerobic filter tank and the second aerobic filter tank; Aeration tube is equipped with in second supporting layer in the first aerobic filter tank and the second aerobic filter tank.Below the filler in each filter tank, be provided with supporting layer, support the various pipelines bottom the body of each pond.
As preferably, also comprise backwashing equipment, backwashing equipment comprises aeration tube, back flushing water inlet pipe, back flushing inlet pipe, the second blow-down pipe.Backwashing equipment utilizes process water outlet to rinse, and adopts first up and then down reciprocal mode, effective, saves energy consumption.Back flushing intakes inlet pipe in supporting layer with the formal distribution of circular perforation pipe.
The application of annular BAF, comprises the following steps,
A. sewage enters the first filter tank through water inlet pipe, and sewage is from top to bottom through filler space, and sewage, through the degraded of anerobe, anaerobic reaction occurs, and in sewage, organic concentration reduces;
B. sewage enters anoxic filter tank by the first water hole bottom the first filter tank, and sewage is from bottom to top by filler space;
C. sewage enters the first aerobic filter tank by first overflow weir at top, anoxic filter tank, and sewage is from top to bottom through filler space, and aeration tube is to oxygenation in it, and the aerobic microbiological be attached on packing layer decomposes the organism of sewage;
D. second water hole of sewage bottom the first aerobic filter tank enters the second aerobic filter tank, sewage is from bottom to top by filler space, aeration tube is to oxygenation in it, and the aerobic microbiological be attached on packing layer decomposes remaining organism in sewage, and the water after purification is discharged through outlet slot.
When the biofilm thickness on packing layer is blocked up, carry out back flushing, adopt up-and-down reciprocating backwashing manner to rinse, adopt air-water-gas+water to mix the mode of three steps flushings.First, gas, water are all rinse from the bottom up, and water outlet is collected by drainage tray, are discharged by back flushing drainage pipeline.When upward flow rinses end, close the valve of back flushing water shoot, retaining is to clear water zone top water-level, then the blow-down pipe valve of bottom is opened, the clear water both following mode to stream rinses filtrate and supporting layer until filter pool inner water drains, and is gone out by the aging microbial film wash-out come off like this, ensures biomembranous activity and processing efficiency, realize longer backwashing period, maintain the steady running in filter tank.
Compared with prior art, beneficial effect of the present invention is:
(1) technique is taken up an area few, less investment, operational management is convenient: the present invention is double cylinder structure, the central position of double cylinder structure is located in anaerobic zone, anoxic filter tank, the first aerobic filter tank and the second aerobic filter tank are arranged in outer ring, achieve the integration of anaerobism, anoxic and aerobic structures, are ensureing under the prerequisite that water quality treatment is up to standard, decrease the floor space of structures, save construction investment.Inlet and outlet water of the present invention is Continuous Flow simultaneously, has operational management advantage easily.
(2) sewage fluidised form is good, and phosphor-removing effect is good: pond of the present invention body is made up of double cylinder, and sewage flows in annular pool body, can keep good fluidised form, is convenient to the process of filler to sewage.Meanwhile, annular pool physical efficiency reduces slough preferably.In addition, the present invention can adopt multimedium filler, and as in anoxic filter tank, the first aerobic filter tank and the second aerobic filter tank, can fill one or more fillers in it, can be applicable to the water quality of various change, the scope of application is wide, and transformation property is flexibly strong, and phosphor-removing effect is good.
(3) subregion is reasonable, and denitrification effect is good, and the greenhouse gases of generation are few: the present invention is in anaerobic zone, and sewage is through filler, and carbon source required when can ensure nitrification and denitrification preferably, is conducive to the nitric efficiency improving reactor.In aerobic zone, filler frame bottom is provided with aerating system, can reduce and produce N
2o.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the sectional view of A-A in Fig. 1.
Fig. 3 is the sectional view of B-B in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
Annular BAF, as Figure 1-3, comprise round shape pond body 1, round shape pond body 1 is provided with concentric cylinder 2 and round shape pond body 1 is divided into the first filter tank 3 and the second filter tank from inside to outside successively; First filter tank 3 is the first anaerobic filter; Second filter tank is provided with dividing plate 44, second filter tank is divided into anoxic filter tank 41, first aerobic filter tank 42 and the second aerobic filter tank 43 by dividing plate 44, first filter tank is connected with water-in 311, first filter tank 3 communicates with anoxic filter tank 41, connect successively in aerobic filter tank 42, anoxic filter tank 41, first and the second aerobic filter tank 43, the second aerobic filter tank 43 is provided with outlet.
Embodiment 2
Annular BAF, as Figure 1-3, comprise round shape pond body 1, round shape pond body 1 is provided with concentric cylinder 2 and round shape pond body 1 is divided into the first filter tank 3 and the second filter tank from inside to outside successively; First filter tank 3 is the first anaerobic filter; Second filter tank is provided with dividing plate 44, second filter tank is divided into anoxic filter tank 41, first aerobic filter tank 42 and the second aerobic filter tank 43 by dividing plate 44, first filter tank is connected with water-in 311, first filter tank 3 communicates with anoxic filter tank 41, connect successively in aerobic filter tank 42, anoxic filter tank 41, first and the second aerobic filter tank 43, the second aerobic filter tank 43 is provided with outlet.
First filter tank 3 open top, the first filter tank 3 is provided with distributing trough 31, first packing layer 32 from top to bottom successively and the first supporting layer 33, first packing layer 32 is provided with anerobe, is provided with the first water hole 34 bottom the first filter tank 3.
Top, anoxic filter tank 41 is provided with the first overflow weir 411, and anoxic filter tank 41 connects the first aerobic filter tank 42 by the first overflow weir 411; Be provided with the second aerobic filter tank 42 of water hole 421, first bottom first aerobic filter tank 42 to be connected on the upside of the second aerobic filter tank 43, aerobic filter tank 43, second by the second water hole 421 and be provided with outlet slot 431.
Second filter tank comprises the second packing layer 51, be located at catch net 52 on the upside of the second packing layer 51, be located at the second supporting layer 53 on the downside of the second packing layer 51; Equal load aerobic microbiological on second packing layer 51 in the first aerobic filter tank 42 and the second aerobic filter tank 43; Aeration tube 61 is equipped with in second supporting layer 53 in the first aerobic filter tank 42 and the second aerobic filter tank 43.
Embodiment 3
Annular BAF, as Figure 1-3, comprise round shape pond body 1, round shape pond body 1 is provided with concentric cylinder 2 and round shape pond body 1 is divided into the first filter tank 3 and the second filter tank from inside to outside successively; First filter tank 3 is the first anaerobic filter; Second filter tank is provided with dividing plate 44, second filter tank is divided into anoxic filter tank 41, first aerobic filter tank 42 and the second aerobic filter tank 43 by dividing plate 44, first filter tank is connected with water-in 311, first filter tank 3 communicates with anoxic filter tank 41, connect successively in aerobic filter tank 42, anoxic filter tank 41, first and the second aerobic filter tank 43, the second aerobic filter tank 43 is provided with outlet.
First filter tank 3 open top, the first filter tank 3 is provided with distributing trough 31, first packing layer 32 from top to bottom successively and the first supporting layer 33, first packing layer 32 is provided with anerobe, is provided with the first water hole 34 bottom the first filter tank 3.
Be provided with the first blow-down pipe 36, first filter tank 3 upper inner bottom first filter tank 3 and be provided with back flushing drainage tray 35, back flushing drainage tray 35 is connected with back flushing water shoot 36.First filter tank 3 is communicated with anoxic filter tank 41 by the first water hole 34.The top in anoxic filter tank 41 communicates with the top in the first aerobic filter tank 42, and the bottom in the first aerobic filter tank 42 communicates with the bottom in the second aerobic filter tank 43.
Top, anoxic filter tank 41 is provided with the first overflow weir 411, and anoxic filter tank 41 connects the first aerobic filter tank 42 by the first overflow weir 411; Be provided with the second aerobic filter tank 42 of water hole 421, first bottom first aerobic filter tank 42 to be connected on the upside of the second aerobic filter tank 43, aerobic filter tank 43, second by the second water hole 421 and be provided with outlet slot 431.
Second filter tank comprises the second packing layer 51, be located at catch net 52 on the upside of the second packing layer 51, be located at the second supporting layer 53 on the downside of the second packing layer 51; Equal load aerobic microbiological on second packing layer 51 in the first aerobic filter tank 42 and the second aerobic filter tank 43; Aeration tube 61 is equipped with in second supporting layer 53 in the first aerobic filter tank 42 and the second aerobic filter tank 43.
Also comprise backwashing equipment, backwashing equipment comprises aeration tube 61, back flushing water inlet pipe 62, back flushing inlet pipe 63, second blow-down pipe 64.
Embodiment 4
The application of annular BAF, comprises the following steps,
A. sewage enters the first filter tank 3 through water inlet pipe, and sewage is from top to bottom through filler space, and sewage, through the degraded of anerobe, anaerobic reaction occurs, and in sewage, organic concentration reduces;
B. sewage enters anoxic filter tank 41 by the first water hole 34 bottom the first filter tank 3, and sewage is from bottom to top by filler space;
C. sewage enters the first aerobic filter tank 42 by first overflow weir 411 at top, anoxic filter tank 41, sewage from top to bottom through filler space, aeration tube 61 to its in oxygenation, be attached to the organism that aerobic microbiological on packing layer decomposes sewage;
D. second water hole 421 of sewage bottom the first aerobic filter tank 42 enters the second aerobic filter tank 43, sewage is from bottom to top by filler space, aeration tube 61 to its in oxygenation, the aerobic microbiological be attached on packing layer decomposes remaining organism in sewage, and the water after purification is discharged through outlet slot 431.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (9)
1. annular BAF, it is characterized in that: comprise round shape pond body (1), round shape pond body (1) is provided with concentric cylinder (2) and round shape pond body (1) is divided into the first filter tank (3) and the second filter tank from inside to outside successively; First filter tank (3) is the first anaerobic filter; Second filter tank is provided with dividing plate (44), second filter tank is divided into anoxic filter tank (41), the first aerobic filter tank (42) and the second aerobic filter tank (43) by dividing plate (44), first filter tank is connected with water-in (311), first filter tank (3) communicates with anoxic filter tank (41), connect successively in anoxic filter tank (41), the first aerobic filter tank (42) and the second aerobic filter tank (43), the second aerobic filter tank (43) is provided with outlet.
2. annular BAF according to claim 1, it is characterized in that: the first filter tank (3) open top, first filter tank (3) is provided with distributing trough (31), the first packing layer (32) and the first supporting layer (33) from top to bottom successively, first packing layer (32) is provided with anerobe, and the first filter tank (3) bottom is provided with the first water hole (34).
3. annular BAF according to claim 1, it is characterized in that: the first filter tank (3) bottom is provided with the first blow-down pipe (36), first filter tank (3) upper inner is provided with back flushing drainage tray (35), and back flushing drainage tray (35) is connected with back flushing water shoot (36).
4. annular BAF according to claim 3, is characterized in that: the first filter tank (3) are communicated with anoxic filter tank (41) by the first water hole (34).
5. the annular BAF according to claim 1 or 4, it is characterized in that: the top of anoxic filter tank (41) communicates with the top in the first aerobic filter tank (42), the bottom in the first aerobic filter tank (42) communicates with the bottom in the second aerobic filter tank (43).
6. annular BAF according to claim 1, it is characterized in that: anoxic filter tank (41) top is provided with the first overflow weir (411), anoxic filter tank (41) connect the first aerobic filter tank (42) by the first overflow weir (411); First bottom, aerobic filter tank (42) is provided with the second water hole (421), first aerobic filter tank (42) connects the second aerobic filter tank (43) by the second water hole (421), and the second upside, aerobic filter tank (43) is provided with outlet slot (431).
7. annular BAF according to claim 1, is characterized in that: the second supporting layer (53) that the second filter tank comprises the second packing layer (51), is located at the catch net (52) of the second packing layer (51) upside, is located at the second packing layer (51) downside; The upper equal load aerobic microbiological of second packing layer (51) in the first aerobic filter tank (42) and the second aerobic filter tank (43); Aeration tube (61) is equipped with in second supporting layer (53) in the first aerobic filter tank (42) and the second aerobic filter tank (43).
8. annular BAF according to claim 1, it is characterized in that: also comprise backwashing equipment, backwashing equipment comprises aeration tube (61), back flushing water inlet pipe (62), back flushing inlet pipe (63), the second blow-down pipe (64).
9. the application of annular BAF, is characterized in that: comprise the following steps,
A. sewage enters the first filter tank (3) through water inlet pipe, and sewage is from top to bottom through filler space, and sewage, through the degraded of anerobe, anaerobic reaction occurs, and in sewage, organic concentration reduces;
B. sewage enters anoxic filter tank (41) by first water hole (34) of bottom, the first filter tank (3), and sewage is from bottom to top by filler space;
C. sewage enters the first aerobic filter tank (42) by first overflow weir (411) at anoxic filter tank (41) top, sewage is from top to bottom through filler space, aeration tube (61) is to oxygenation in it, and the aerobic microbiological be attached on packing layer decomposes the organism of sewage;
D. sewage enters the second aerobic filter tank (43) through second water hole (421) of the first bottom, aerobic filter tank (42), sewage is from bottom to top by filler space, aeration tube (61) is to oxygenation in it, the aerobic microbiological be attached on packing layer decomposes remaining organism in sewage, and the water after purification is discharged through outlet slot (431).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106673194A (en) * | 2016-12-20 | 2017-05-17 | 北京桑德环境工程有限公司 | Decarburization, denitrification and dephosphorization deep treatment system and method |
| CN107089727A (en) * | 2017-06-27 | 2017-08-25 | 重庆大学 | A kind of integral type three-level AO sewage disposal systems and its handling process |
| CN109665632A (en) * | 2019-02-25 | 2019-04-23 | 张强 | A kind of technique of fast degradation high concentration eutrophic sewage |
| CN110845078A (en) * | 2019-11-14 | 2020-02-28 | 广东威特雅环境科技有限公司 | Adjustable integrated garbage transfer station leachate treatment system and process |
| CN111170562A (en) * | 2020-01-10 | 2020-05-19 | 华北水利水电大学 | Water purification device and purification method for coping with point source water pollution |
| CN113526800A (en) * | 2021-08-04 | 2021-10-22 | 九江南大环保创新中心有限公司 | Be used for biochemical tail water to carry mark transformation degree of depth biological filter for denitrogenation |
| CN116768425A (en) * | 2023-08-15 | 2023-09-19 | 江苏龙腾工程设计股份有限公司 | Ecological wetland system for rural environment lifting |
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| CN103073109A (en) * | 2013-01-09 | 2013-05-01 | 常州大学 | Composite biotrickling filter for nitrogen and phosphorus removal |
| CN203346171U (en) * | 2013-07-02 | 2013-12-18 | 江苏省交通规划设计院股份有限公司 | Baffled biological aerated filter (BBAF) |
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| CN102107947A (en) * | 2011-01-19 | 2011-06-29 | 重庆大学 | Aeration biological filter chamber facility |
| CN103073109A (en) * | 2013-01-09 | 2013-05-01 | 常州大学 | Composite biotrickling filter for nitrogen and phosphorus removal |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106673194A (en) * | 2016-12-20 | 2017-05-17 | 北京桑德环境工程有限公司 | Decarburization, denitrification and dephosphorization deep treatment system and method |
| CN107089727A (en) * | 2017-06-27 | 2017-08-25 | 重庆大学 | A kind of integral type three-level AO sewage disposal systems and its handling process |
| CN109665632A (en) * | 2019-02-25 | 2019-04-23 | 张强 | A kind of technique of fast degradation high concentration eutrophic sewage |
| CN110845078A (en) * | 2019-11-14 | 2020-02-28 | 广东威特雅环境科技有限公司 | Adjustable integrated garbage transfer station leachate treatment system and process |
| CN110845078B (en) * | 2019-11-14 | 2021-10-29 | 广东威特雅环境科技有限公司 | Adjustable integrated garbage transfer station leachate treatment system and process |
| CN111170562A (en) * | 2020-01-10 | 2020-05-19 | 华北水利水电大学 | Water purification device and purification method for coping with point source water pollution |
| CN113526800A (en) * | 2021-08-04 | 2021-10-22 | 九江南大环保创新中心有限公司 | Be used for biochemical tail water to carry mark transformation degree of depth biological filter for denitrogenation |
| CN116768425A (en) * | 2023-08-15 | 2023-09-19 | 江苏龙腾工程设计股份有限公司 | Ecological wetland system for rural environment lifting |
| CN116768425B (en) * | 2023-08-15 | 2023-11-03 | 江苏龙腾工程设计股份有限公司 | Ecological wetland system for rural environment lifting |
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