CN105217785A - Multimedium baffled biological aerated filter and application thereof - Google Patents
Multimedium baffled biological aerated filter and application thereof Download PDFInfo
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- CN105217785A CN105217785A CN201510590356.XA CN201510590356A CN105217785A CN 105217785 A CN105217785 A CN 105217785A CN 201510590356 A CN201510590356 A CN 201510590356A CN 105217785 A CN105217785 A CN 105217785A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000012856 packing Methods 0.000 claims abstract description 53
- 239000010865 sewage Substances 0.000 claims abstract description 40
- 244000005700 microbiome Species 0.000 claims abstract description 29
- 102000004190 Enzymes Human genes 0.000 claims abstract description 27
- 108090000790 Enzymes Proteins 0.000 claims abstract description 27
- 239000010410 layer Substances 0.000 claims description 66
- 239000000945 filler Substances 0.000 claims description 36
- 238000005273 aeration Methods 0.000 claims description 31
- 238000011010 flushing procedure Methods 0.000 claims description 17
- 238000010926 purge Methods 0.000 claims description 16
- 229910021536 Zeolite Inorganic materials 0.000 claims description 10
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 10
- 239000010457 zeolite Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 8
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000011068 loading method Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000813 microbial effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000011284 combination treatment Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 244000144972 livestock Species 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention relates to technical field of sewage, disclose multimedium baffled biological aerated filter, comprise two-stage aerated biological filter (1) and water hole (2), two-stage aerated biological filter (1) is communicated with by the water hole (2) of downside; Two-stage aerated biological filter (1) is equipped with packing layer, and packing layer the first packing layer (31) and the second packing layer (32) successively from top to bottom, the first packing layer (31) is fixed with microorganism and/or biological enzyme.Also disclose the application of multimedium baffled biological aerated filter.Downflow system and upflowing are arranged in same BAF system by the present invention, and apparatus structure is compact, reduces floor space.First step BAF mainly removes the organism in sewage, reduces the organic loading entering second stage BAF, is beneficial to the nitrated of second stage BAF.In second stage BAF, remove the organism in sewage further, and carry out nitrated under low organic loading.
Description
Technical field
The present invention relates to technical field of sewage, relate to multimedium baffled biological aerated filter, particularly relate to the application of multimedium baffled biological aerated filter.
Background technology
Livestock breeding wastewater suspended substance is many, ammonia nitrogen concentration is high, organic concentrations is high, stink is large, with regard to its quantity discharged, to take COD as the quantity discharged of equivalent the be industry of its organism and urban life waste discharge amount 2 times, but also containing characteristics such as the pathogenic agent excreted with livestock and poultry, intractability is large and be difficult to qualified discharge after traditional technology process.
Breeding wastewater adopts the biological treatments such as natural ecological resource technology, Anaerobic Methods in Treating, aerobic treatment technology, combination treatment technology at present mostly.For single aerobic, anaerobic treatment effect is unsatisfactory, current animal farm wastewater generally adopts anaerobism+aerobic biochemical combination treatment technology, but the waste water great majority after process still do not reach emission standard.
Summary of the invention
The present invention is directed to the shortcoming of prior art, disclose multimedium baffled biological aerated filter, also disclose the application of multimedium baffled biological aerated filter, reach occupation of land less, reduced investment, working cost are low, efficiency is high, operational management technique effect easily.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals.
Multimedium baffled biological aerated filter, comprises two-stage aerated biological filter and water hole, and two-stage aerated biological filter is communicated with by the water hole of downside; Two-stage aerated biological filter is equipped with packing layer, and packing layer the first packing layer and the second packing layer successively from top to bottom, the first packing layer is fixed with microorganism and/or biological enzyme.
The present invention combines feedwater rapid filter and the feature of saprobia catalytic oxidation, retaining and the microbial film of filling surface by filtrate, and under the condition of aeration, to filter, biological adsorption flocculation, biological oxidation is in purifying liquid waste.Owing to there is aerobic, anaerobism, anoxic microenvironment in the body of pond, nitrated, denitrification can be carried out simultaneously, therefore can integrate organic matter removal and denitrogenation.Simultaneously present different biophase due to the minimizing of the nutritive substance along with flow velocity direction, such that the biophase of BAF is quite abundant, food chain is longer and complicated than general technique.
As preferably, two-stage aerated biological filter is first step BAF and second stage BAF, be provided with water inlet pipe on the upside of first step BAF, be provided with rising pipe on the upside of the BAF of the second stage, on the downside of two-stage aerated biological filter, be equipped with aeration tube.
As preferably, two-stage aerated biological filter also comprises and is located at catch net on the upside of packing layer, is located at supporting layer on the downside of packing layer; Be located at the filter plate on the downside of supporting layer, between supporting layer and filter plate, be provided with aeration tube.Be provided with aeration tube between supporting layer and filter plate, adopt perforated pipe distribution device even gas distribution, solve that bias current, filler are uneven, tracheae holds susceptible to plugging problem.
As preferably, be protective layer on the upside of catch net.
As preferably, also comprise back-purge system, back-purge system comprises aeration tube, backwash tube, back flushing water leg, back flushing water shoot, and backwash tube is located in supporting layer.
As preferably, aeration tube is ring-type aeration tube.
As preferably, also comprise back-purge system, back-purge system comprises aeration tube, backwash tube, back flushing water leg, back flushing water shoot, and first step BAF is also communicated with by backwash tube with the bottom of second stage BAF.
As preferably, the first packing layer is the urethane bio-sponge filler being fixed with microorganism and/or biological enzyme, and the second packing layer is zeolite and granulated active carbon.The present invention adopts multimedium filler, for the drawback that traditional single filter material BAF exists in actual applications, layer of oxygen deficient and aerobic layer are placed in same BAF system by the present invention, thus improve the nitrogen removal performance of BAF, realize the synchronous removal to COD, SS, NH3-N and TN.
Be fixed with microorganism and/or biological enzyme in urethane bio-sponge filler, be placed in the packing layer of upside (i.e. the first packing layer), to remove SS and other pollutents further.After fixation of microbe and/or biological enzyme, urethane bio-sponge filling carrier density is close to the density of water, and load of microorganisms amount is large, and volumetric loading is up to 8kgBOD
5/ m
3d, specific surface area is 15-40m
2/ g; Owing to having larger specific surface area, biofilm is easy, and thus biological load amount is large, and biological load amount can reach more than 10-20g/L, exceeds more than 5 times than existing effluent purification method; And microbial film (i.e. microorganism and/or biological enzyme) upgrades than very fast, thus microorganism (i.e. microorganism and/or biological enzyme) has higher activity, substantially increases processing efficiency and wastewater treatment efficiency.
The combination (namely zeolite and granulated active carbon combine) of multimedium filler takes full advantage of two materials advantage separately; Extend the work period of zeolite, improve the biological activity on granulated active carbon; When not having ammonia nitrogen in high density to impact for a long time, can ensure zeolite long-time running and without the need to regeneration, not only economy but also efficient.Due to the combination of multimedium filler, present semifixed semifluid state, flowing carrier constantly contacts with bubble, and thus its oxygen-transfer efficiency is high, is conducive to accelerating organic oxidation rate.
As preferably, the first packing layer is the poly-third foam filter pearl being fixed with microorganism and/or biological enzyme, and the second packing layer is the one in volcanics, haydite, quartz sand.
The application of multimedium baffled biological aerated filter, comprises the following steps:
A. sewage enters first step BAF through water inlet pipe, sewage is from top to bottom by filler space, the air that aeration tube produces is from top to bottom by filler space, and sewage and air are at filler space counter current contact, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme; Ammonia in sewage, nitrogen (organonitrogen) are converted into nitric nitrogen by nitrifier in aerobic environment.
B. sewage enters second stage BAF by water hole, and the air that sewage and aeration tube produce is all from top to bottom by filler space, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme; Through step B, sewage fully contacts with the microbial film that filler adheres to, and removes the organism in sewage further, carries out nitrated under low organic loading.The dominant bacteria that on biologic packing material in two-stage aerated biological filter, load is different, ensures and needs the carbonization of different condition and nitration reaction can carry out in different regions.
C. when the water level of first step BAF water level higher than second stage BAF, carry out back flushing, close water inlet pipe and rising pipe, open back-purge system, discharge the water of backwash.After filter tank processes for some time sewage, in filter tank, suspended substance increases, and causes the reduction of filtrate discharge capacity, now needs to carry out back flushing.Process due to sewage carries out step by step, so the amount of suspended substance is successively decreased step by step contained by two-stage aerated biological filter, can be judged the situation of suspended substance by hydraulic pressure difference in two-stage aerated biological filter.Such as: when the water level of first step BAF water level higher than second stage BAF (when in one-level BAF water level, second stage BAF, liquid level difference is greater than preset value), namely illustrate that the discharge capacity of the filtrate of first step BAF is very low, should start to carry out backwash procedure; First close inlet valve and the flowing water Valve of this BAF, only keep backwash BAF aeration, carry out backwash draining.
First step BAF mainly removes the organism in sewage, reduces the organic loading entering second stage BAF, is beneficial to the nitrated of second stage BAF.Meanwhile, the nitrification liquid of backflow utilizes the carbon source in water inlet to carry out denitrification at this section, and the ammonia nitrogen in sewage and organonitrogen are converted into nitric nitrogen by nitrifier in aerobic environment.In second stage BAF, remove the organism in sewage further, and carry out nitrated under low organic loading.Then be rendered as pulling flow type on the whole, reach the object of organic matter removal and denitrogenation dephosphorizing, and effectively alleviate filter clogging problem, realize dirty water purification.On biologic packing material carrier, breed dominant bacterias different separately at two-stage aerated biological filter, and will the carbonization of different condition and nitration reaction be needed separately to carry out in different regions.
Compared with prior art, beneficial effect of the present invention is:
(1) downflow system and upflowing are arranged in same BAF system by the present invention, and apparatus structure is compact, reduces floor space, reduces capital construction and working cost.
(2) the present invention completes nitrification and denitrification effect in same BAF, achieves COD, SS, NH
3the synchronous removal of-N and TN.
(3) by the combination of different filtrate, enhance the synchronous removal effect of multiple pollutant, improve system capacity of resisting impact load, greatly reduce the possibility hardening and occur.
A. zeolite has the feature of selective adsorption ammonia nitrogen, and its surface also can form microbial film (becoming biozeolite) and the removal ability of ammonia nitrogen is improved simultaneously.
B. zeolite and granulated active carbon combine, and extend the work period of zeolite, make the biological growth on granulated active carbon good, can ensure when there not being long-term ammonia nitrogen in high density to impact zeolite long-time running and without the need to regenerating, economic and reliable.
C. be fixed with microorganism and/or biological enzyme in urethane bio-sponge filler, be placed in the packing layer of upside (i.e. the first packing layer), to remove SS and other pollutents further.After fixation of microbe and/or biological enzyme, urethane bio-sponge filling carrier density is close to the density of water, and load of microorganisms amount is large, and volumetric loading is up to 8kgBOD
5/ m
3d, specific surface area is 15-40m
2/ g; Owing to having larger specific surface area, biofilm is easy, and thus biological load amount is large, and biological load amount can reach more than 10-20g/L, exceeds more than 5 times than existing effluent purification method; And microbial film (i.e. microorganism and/or biological enzyme) upgrades than very fast, thus microorganism (i.e. microorganism and/or biological enzyme) has higher activity, substantially increases processing efficiency and wastewater treatment efficiency.
D. due to the combination of multimedium filler, make filter material layer present semifixed semifluid state, flowing carrier constantly carries out contacting with bubble and constantly cuts, and thus its oxygen-transfer efficiency is high, is conducive to accelerating organic oxidation rate.
E. whole packing layer from the bottom up, the grading composition that packing material size reduces successively, also plays rejection effect preferably.
(4) aeration tube is arranged on below supporting layer, adopts perforated pipe distribution device even gas distribution, solves that bias current, filler are uneven, tracheae holds susceptible to plugging problem.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Embodiment 1
Multimedium baffled biological aerated filter, as shown in Figure 1, comprise two-stage aerated biological filter 1 and water hole 2, two-stage aerated biological filter 1 is communicated with by the water hole 2 of downside; Two-stage aerated biological filter 1 is equipped with packing layer, and the first packing layer 31 and the second packing layer 32, first packing layer 31 are fixed with microorganism and/or biological enzyme to packing layer successively from top to bottom.First packing layer 31 is for being fixed with the urethane bio-sponge filler of microorganism and/or biological enzyme, and the second packing layer 32 is zeolite and granulated active carbon.
Two-stage aerated biological filter 1 is first step BAF 11 and second stage BAF 12, is provided with water inlet pipe 111 on the upside of first step BAF 11, is provided with rising pipe 121 on the upside of second stage BAF 12.Two-stage aerated biological filter 1 also comprises and is located at catch net 33 on the upside of packing layer, is located at supporting layer 34 on the downside of packing layer; Be located at the filter plate 35 on the downside of supporting layer 34, between supporting layer 34 and filter plate 35, be provided with aeration tube 51.It is protective layer 4 on the upside of catch net 33.
Also comprise back-purge system, back-purge system comprises aeration tube 51, backwash tube 52, back flushing water leg, back flushing water shoot, backwash tube 52 is located in supporting layer 34, and first step BAF 11 is also communicated with by backwash tube 52 with the bottom of second stage BAF 12.Aeration tube 51 is ring-type aeration tube.
The application of multimedium baffled biological aerated filter, comprises the following steps:
A. sewage enters first step BAF 11 through water inlet pipe, sewage is from top to bottom by filler space, the air that aeration tube 51 produces is from top to bottom by filler space, and sewage and air are at filler space counter current contact, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme;
B. sewage enters second stage BAF 12 by water hole 2, and the air that sewage and aeration tube produce is all from top to bottom by filler space, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme;
C. when the water level of first step BAF 11 water level higher than second stage BAF 12, carry out back flushing, close water inlet pipe 111 and rising pipe 121, open back-purge system, discharge the water of backwash.
Embodiment 2
Multimedium baffled biological aerated filter, as shown in Figure 1, comprise two-stage aerated biological filter 1 and water hole 2, two-stage aerated biological filter 1 is communicated with by the water hole 2 of downside; Two-stage aerated biological filter 1 is equipped with packing layer, and the first packing layer 31 and the second packing layer 32, first packing layer 31 are fixed with microorganism and/or biological enzyme to packing layer successively from top to bottom.First packing layer 31 is for being fixed with the poly-third foam filter pearl of microorganism and/or biological enzyme, and the second packing layer 32 is the one in volcanics, haydite, quartz sand.
Two-stage aerated biological filter 1 is first step BAF 11 and second stage BAF 12, is provided with water inlet pipe 111 on the upside of first step BAF 11, is provided with rising pipe 121 on the upside of second stage BAF 12.Two-stage aerated biological filter 1 also comprises and is located at catch net 33 on the upside of packing layer, is located at supporting layer 34 on the downside of packing layer; Be located at the filter plate 35 on the downside of supporting layer 34, between supporting layer 34 and filter plate 35, be provided with aeration tube 51.It is protective layer 4 on the upside of catch net 33.
Also comprise back-purge system, back-purge system comprises aeration tube 51, backwash tube 52, back flushing water leg, back flushing water shoot, backwash tube 52 is located in supporting layer 34, and first step BAF 11 is also communicated with by backwash tube 52 with the bottom of second stage BAF 12.Aeration tube 51 is ring-type aeration tube.
The application of multimedium baffled biological aerated filter, comprises the following steps:
A. sewage enters first step BAF 11 through water inlet pipe, sewage is from top to bottom by filler space, the air that aeration tube 51 produces is from top to bottom by filler space, and sewage and air are at filler space counter current contact, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme;
B. sewage enters second stage BAF 12 by water hole 2, and the air that sewage and aeration tube produce is all from top to bottom by filler space, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme;
C. when the water level of first step BAF 11 water level higher than second stage BAF 12, carry out back flushing, close water inlet pipe 111 and rising pipe 121, open back-purge system, discharge the water of backwash.
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 (10)
1. multimedium baffled biological aerated filter, is characterized in that: comprise two-stage aerated biological filter (1) and water hole (2), and two-stage aerated biological filter (1) is communicated with by the water hole (2) of downside; Two-stage aerated biological filter (1) is equipped with packing layer, and packing layer the first packing layer (31) and the second packing layer (32) successively from top to bottom, the first packing layer (31) is fixed with microorganism and/or biological enzyme.
2. multimedium baffled biological aerated filter according to claim 1, it is characterized in that: two-stage aerated biological filter (1) is first step BAF (11) and second stage BAF (12), first step BAF (11) upside is provided with water inlet pipe (111), and second stage BAF (12) upside is provided with rising pipe (121).
3. multimedium baffled biological aerated filter according to claim 1, is characterized in that: two-stage aerated biological filter (1) also comprises and is located at catch net (33) on the upside of packing layer, is located at supporting layer (34) on the downside of packing layer; Be located at the filter plate (35) of supporting layer (34) downside, between supporting layer (34) and filter plate (35), be provided with aeration tube (51).
4. multimedium baffled biological aerated filter according to claim 3, is characterized in that: catch net (33) upside is protective layer (4).
5. multimedium baffled biological aerated filter according to claim 3, it is characterized in that: also comprise back-purge system, back-purge system comprises aeration tube (51), backwash tube (52), back flushing water leg, back flushing water shoot, and backwash tube (52) is located in supporting layer (34).
6. multimedium baffled biological aerated filter according to claim 5, is characterized in that: aeration tube (51) is ring-type aeration tube.
7. multimedium baffled biological aerated filter according to claim 3, it is characterized in that: also comprise back-purge system, back-purge system comprises aeration tube (51), backwash tube (52), back flushing water leg, back flushing water shoot, and first step BAF (11) is also communicated with by backwash tube (52) with the bottom of second stage BAF (12).
8. multimedium baffled biological aerated filter according to claim 1; it is characterized in that: the first packing layer (31) is for being fixed with the urethane bio-sponge filler of microorganism and/or biological enzyme, and the second packing layer (32) is zeolite and granulated active carbon.
9. multimedium baffled biological aerated filter according to claim 1, it is characterized in that: the first packing layer (31) is for being fixed with the poly-third foam filter pearl of microorganism and/or biological enzyme, and the second packing layer (32) is volcanics, one in haydite, quartz sand.
10. the application of multimedium baffled biological aerated filter, is characterized in that: comprise the following steps:
A. sewage enters first step BAF (11) through water inlet pipe, sewage is from top to bottom by filler space, the air that aeration tube (51) produces is from top to bottom by filler space, sewage and air are at filler space counter current contact, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme;
B. sewage enters second stage BAF (12) by water hole (2), and the air that sewage and aeration tube produce is all from top to bottom by filler space, and sewage fully contacts with the microorganism that filler adheres to and/or biological enzyme;
C. when the water level of first step BAF (11) water level higher than second stage BAF (12), carry out back flushing, close water inlet pipe (111) and rising pipe (112), open back-purge system, discharge the water of backwash.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105923756A (en) * | 2016-07-10 | 2016-09-07 | 赖柱彭 | Aeration tank system |
| CN106495402A (en) * | 2016-11-25 | 2017-03-15 | 青海七彩花生物科技有限公司 | A kind of biotechnology useless water purifying means of purification and its using method |
| CN106554077A (en) * | 2016-10-12 | 2017-04-05 | 江苏中宜金大环保产业技术研究院有限公司 | A kind of device and its operation method for alleviating the blocking of denitrification deep-bed filter top layer |
| CN107572662A (en) * | 2017-09-22 | 2018-01-12 | 浙江海洋大学 | A kind of micro-polluted source water biological treatment device |
| CN109205769A (en) * | 2017-06-30 | 2019-01-15 | 江苏天地化纤有限公司 | A kind of biological aerated filter |
| CN109665632A (en) * | 2019-02-25 | 2019-04-23 | 张强 | A kind of technique of fast degradation high concentration eutrophic sewage |
| CN111977784A (en) * | 2020-08-21 | 2020-11-24 | 惠州市玮蓝环保科技有限公司 | Plug flow type aerobic biofilter and sewage treatment method |
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