CN201376919Y - Anoxic-aerobic combined type sewage treatment unit - Google Patents
Anoxic-aerobic combined type sewage treatment unit Download PDFInfo
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- CN201376919Y CN201376919Y CN200920099556U CN200920099556U CN201376919Y CN 201376919 Y CN201376919 Y CN 201376919Y CN 200920099556 U CN200920099556 U CN 200920099556U CN 200920099556 U CN200920099556 U CN 200920099556U CN 201376919 Y CN201376919 Y CN 201376919Y
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Abstract
The utility model provides an anoxic-aerobic combined type sewage treatment unit and relates to a sewage treatment unit; the sewage treatment unit solves the problems that the existing biological aerated filter has long processing process, high operational cost and poor processing efficiency. A plurality of first long handle filtering heads are uniformly distributed on a first filtering plate, a plurality of second long handle filtering heads are uniformly distributed on a second filtering plate, a first water outlet tank is communicated with a second water distribution chamber by an anoxic biological filter outlet pipe, a second water outlet tank is communicated with a clean water tank by a biological aerated filter outlet pipe, a nitrating liquid reflux pump is communicated with a first water distribution chamber by a nitrating liquid reflux pipe, a back flushing water pump is communicated with the second water distribution chamber by a back flushing liquid outlet pipe of the biological aerated filter, the back flushing water pump is communicated with the first water distribution chamber by the back flushing liquid outlet pipe of the biological aerated filter, and a first back flushing waste water tank is communicated with a waste water tank by a first back flushing waste water outlet pipe. The sewage treatment unit has high automation degree, good processing effect and short processing flow.
Description
Technical field
The utility model relates to a kind of waste disposal plant, is specifically related to the aerobic combined waste disposal plant of a kind of anoxic.
Background technology
In recent years, on the basis of traditional waste water treatment process, many sewage treatment techniques been have have been researched and developed.Based on the traditional biological embrane method,, in the second-stage treatment of sewage, embody characteristics such as handling load is high, effluent quality is good, flow process is simple, saving floor space in conjunction with BAF to the research and development of water treatment rapid filter principle.External famous environmental protection company all with it as key product.At Canada 410,000 m under construction
3The BAF sewage treatment facility of/d is built up 240,000 m respectively in France and Germany
3/ d and 310,000 m
3The BAF treatment facility of/d.The research of China is used later relatively, during the nearly last ten years, a lot of scholars of China and research unit have carried out big quantity research to aspects such as the structure formation of BAF, function, detergency mechanism, filtrate selection, operation starts, obtained a lot of achievements, also carried out the engineering application to a certain extent and be devoted to production domesticization.
BAF is used for the pre-treatment of little source of pollution water or the advanced treatment of sewage at first, because its good handling property, its range of application enlarges gradually, not only can be used for body eutrophication and handle, and be used to municipal effluent, community life sewage, living miscellaneous wastewater and food processing wastewater widely, brewage the processing with high density waste water such as papermaking as the second-stage treatment main process.For reaching various effluent quality requirements, at present, the combination procesies that utilize BAF to dispose of sewage many employing secondarys, three grades of technologies and form with SBR (abbreviation of sequence intermittent activated sludge process), coagulating sedimentation etc., but ubiquity, and treatment scheme is long, water quality and quantity changes aftertreatment effect problem of unstable, and when carrying out the sewage denitrification processing, often need additional carbon to carry out denitrification, increased the running cost of water treatment owing to C/N (carbon-nitrogen ratio) in the water inlet is not enough.
The utility model content
The utility model exists in order to solve existing BAF that treatment scheme is long, running cost is high, the problem of poor processing effect, and then provides a kind of anoxic aerobic combined waste disposal plant.
The technical solution of the utility model is: the aerobic combined waste disposal plant of a kind of anoxic comprises anoxic biological filter, BAF, clean water basin, wastewater disposal basin, nitrification liquid reflux pump, backwash pump and return of waste water pump; Described anoxic biological filter, BAF, clean water basin and wastewater disposal basin set gradually, described waste disposal plant also comprises water inlet manifold, anoxic biological filter rising pipe, the BAF rising pipe, the nitrification liquid return line, BAF counter-flushing liquid rising pipe, anoxic biological filter back flushing water inlet pipe, the first backwashing wastewater valve, the first back flushing blower valve, the first backwashing wastewater rising pipe, the second backwashing wastewater rising pipe, the second backwashing wastewater valve, the second back flushing blower valve, back flushing gas blower and air purge backwash tube, described anoxic biological filter is by the first pond body, first distributing water room, plastic ceiling, first filter plate, first supporting layer, several first strainer heads, first filter material layer, first effluent trough and the first backwashing wastewater groove are formed, be provided with first distributing water room from bottom to top successively in the described first pond body, first filter plate, first supporting layer and first filter material layer, described several first strainer heads are uniform to be arranged on first filter plate, described first effluent trough is arranged on the upper right quarter of the first pond body, the described first backwashing wastewater groove is arranged on the upper left quarter of the first pond body, and described plastic ceiling is installed on the upper surface of the first pond body; Described BAF comprises the second pond body, second distributing water room, second filter plate, second supporting layer, several second strainer heads, second filter material layer, second effluent trough, second backwashing wastewater groove and the aeration blower, be provided with second distributing water room from bottom to top successively in the described second pond body, second filter plate, second supporting layer and second filter material layer, described several second strainer heads are uniform to be arranged on second filter plate, the described second backwashing wastewater groove and second effluent trough are successively set on the upper right quarter of the second pond body, and it is external and be communicated with it that described aeration blower is arranged on second pond; Be provided with nitrification liquid reflux pump and backwash pump in the described clean water basin, be provided with the return of waste water pump in the described wastewater disposal basin; One end of described water inlet manifold is communicated with first distributing water room, described first effluent trough is communicated with second distributing water room by anoxic biological filter rising pipe, described second effluent trough is communicated with clean water basin by the BAF rising pipe, the nitrification liquid reflux pump is communicated with first distributing water room by the nitrification liquid return line, described backwash pump is communicated with second distributing water room by BAF counter-flushing liquid rising pipe, backwash pump is communicated with first distributing water room by anoxic biological filter back flushing water inlet pipe, the described first backwashing wastewater groove is communicated with wastewater disposal basin by the first backwashing wastewater rising pipe, the described first backwashing wastewater rising pipe is provided with the first backwashing wastewater valve, the described second backwashing wastewater groove is communicated with wastewater disposal basin by the second backwashing wastewater rising pipe, the described second backwashing wastewater rising pipe is provided with the second backwashing wastewater valve, described first distributing water room is communicated with second distributing water room by the air purge backwash tube, described air purge backwash tube is provided with the back flushing gas blower, and the air purge backwash tube of back flushing gas blower both sides is provided with the first back flushing blower valve and the second back flushing blower valve.
The utlity model has following beneficial effect: one, waste disposal plant of the present utility model is combined by the anoxic biological filter, BAF, clean water basin and the wastewater disposal basin that are connected successively, the return of waste water that will contain nitrate is to the anoxic biological filter, make anti-nitration reaction utilize former water carbon source, reduced the carbon source amount that adds, reduced the COD load of follow-up BAF simultaneously, realize decarburization, nitrated, denitrifying function, realized the advanced treatment of waste water simultaneously; Two, the utility model compact construction, the level of automation height, one-time investment is little, the operation processing cost is low, (anoxic pond is finished denitrification process to its modularization, nitrifying process is finished in the aeration tank, that is to say that each pond body finishes a function) design can better adapt to the variation of the water yield and water quality, also can be according to the Inlet and outlet water requirements in water quality, combine with technologies such as other pretreatment technology and chemical dephosphorization, uv sterilisation or chemical agent sterilizations easily, change operating parameter that also can be suitable is handled different waste water; Three, the utility model processing waste water scope is big, treatment effect good, treatment scheme is short, practicality, workable.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model; Fig. 2 is the strainer head distribution schematic diagram in the anoxic biological filter; Fig. 3 is the strainer head distribution schematic diagram in the BAF; Fig. 4 is the single hole film air diffuser distribution schematic diagram in the BAF.
Embodiment
Embodiment one: shown in Fig. 1～3, the aerobic combined waste disposal plant of the described anoxic of present embodiment comprises anoxic biological filter, BAF, clean water basin 41, wastewater disposal basin 42, nitrification liquid reflux pump 21, backwash pump 22 and return of waste water pump 23; Described anoxic biological filter, BAF, clean water basin 41 and wastewater disposal basin 42 set gradually, described waste disposal plant also comprises water inlet manifold 24, anoxic biological filter rising pipe 25, BAF rising pipe 26, nitrification liquid return line 27, BAF counter-flushing liquid rising pipe 28, anoxic biological filter back flushing water inlet pipe 29, the first backwashing wastewater valve 30, the first back flushing blower valve 31, the first backwashing wastewater rising pipe 32, the second backwashing wastewater rising pipe 33, the second backwashing wastewater valve 34, the second back flushing blower valve 37, back flushing gas blower 38 and air purge backwash tube 39, described anoxic biological filter is by the first pond body 1, first distributing water room 2, plastic ceiling 3, first filter plate 6, first supporting layer 4, several first strainer heads 7, first filter material layer 8, first effluent trough 5 and the first backwashing wastewater groove 9 are formed, be provided with first distributing water room 2 from bottom to top successively in the described first pond body 1, first filter plate 6, first supporting layer 4 and first filter material layer 8, described several first strainer head, 7 uniform being arranged on first filter plate 6, described first effluent trough 5 is arranged on the upper right quarter of the first pond body 1, the described first backwashing wastewater groove 9 is arranged on the upper left quarter of the first pond body 1, and described plastic ceiling 3 is installed on the upper surface of the first pond body 1; Described BAF comprises the second pond body 11, second distributing water room 12, second filter plate 16, second supporting layer 14, several second strainer heads 17, second filter material layer 18, second effluent trough 15, the second backwashing wastewater groove 19 and aeration blower 20, be provided with second distributing water room 12 from bottom to top successively in the described second pond body 11, second filter plate 16, second supporting layer 14 and second filter material layer 18, described several second strainer head, 17 uniform being arranged on second filter plate 16, the described second backwashing wastewater groove 19 and second effluent trough 15 are successively set on the upper right quarter of the second pond body 11, and described aeration blower 20 is arranged on outside the second pond body 11 and with it and is communicated with; Be provided with nitrification liquid reflux pump 21 and backwash pump 22 in the described clean water basin 41, be provided with return of waste water pump 23 in the described wastewater disposal basin 42; One end of described water inlet manifold 24 is communicated with first distributing water room 2, described first effluent trough 5 is communicated with second distributing water room 12 by anoxic biological filter rising pipe 25, described second effluent trough 15 is communicated with clean water basin 41 by BAF rising pipe 26, nitrification liquid reflux pump 21 is communicated with first distributing water room 2 by nitrification liquid return line 27, described backwash pump 22 is communicated with second distributing water room 12 by BAF counter-flushing liquid rising pipe 28, backwash pump 22 is communicated with first distributing water room 2 by anoxic biological filter back flushing water inlet pipe 29, the described first backwashing wastewater groove 9 is communicated with wastewater disposal basin 42 by the first backwashing wastewater rising pipe 32, the described first backwashing wastewater rising pipe 32 is provided with the first backwashing wastewater valve 30, the described second backwashing wastewater groove 19 is communicated with wastewater disposal basin 42 by the second backwashing wastewater rising pipe 33, the described second backwashing wastewater rising pipe 33 is provided with the second backwashing wastewater valve 34, described first distributing water room 2 is communicated with second distributing water room 12 by air purge backwash tube 39, described air purge backwash tube 39 is provided with back flushing gas blower 38, and the air purge backwash tube 39 of back flushing gas blower 38 both sides is provided with the first back flushing blower valve 31 and the second back flushing blower valve 37.
Embodiment two: as shown in Figure 2, the spacing of described each first strainer head 7 of present embodiment is 500mm.So be provided with, guarantee uniform water distribution.Other composition is identical with embodiment one with annexation.
Embodiment three: as shown in Figure 3, the spacing of described each second strainer head 17 of present embodiment is 500mm.So be provided with, guarantee uniform water distribution.Other composition is identical with embodiment one or two with annexation.
Embodiment four: the filtrate in described first filter material layer 8 of present embodiment is to be that the biological ceramic particle of 6-9mm constitutes by particle diameter, and the thickness of first filter material layer 8 is 2.5～3.5m.So be provided with, particle diameter of filter medium is medium, and thickness is suitable, has reduced head loss, helps the filtrate biofilm simultaneously.Other composition is identical with embodiment three with annexation.
Embodiment five: the filtrate in described second filter material layer 18 of present embodiment is to be that the biological ceramic particle of 4-6mm constitutes by particle diameter, and the thickness of second filter material layer 18 is 3.5～4.2m.So be provided with, particle diameter of filter medium is less, and thickness is bigger, helps the vertical distribution on filtrate of anoxic bacteria and nitrifier, finishes carbonization, nitration reaction in a pond body.Other composition is identical with embodiment three with annexation.
Embodiment six: first supporting layer 4 in the described anoxic of the present embodiment biological filter is made up of three layers of gravel; The particle diameter of lower floor's gravel is 4～8mm, and thickness is 0.1m; The particle diameter of middle layer gravel is 8～16mm, and thickness is 0.1m; The particle diameter of upper strata gravel is 16～32mm, and thickness is 0.1m.So be provided with, ensureing on the basis that filtrate does not run off, effectively reach the purpose of uniform water distribution.Other composition is identical with embodiment three with annexation.
Embodiment seven: second supporting layer 14 in the described BAF of present embodiment is made up of three layers of gravel; The particle diameter of lower floor's gravel is 4～8mm, and thickness is 0.1m; The particle diameter of middle layer gravel is 8～16mm, and thickness is 0.1m; The particle diameter of upper strata gravel is 16～32mm, and thickness is 0.1m.So be provided with, ensureing on the basis that filtrate does not run off, effectively reach the purpose of uniform water distribution.Other composition is identical with embodiment three with annexation.
Embodiment eight: as shown in Figure 4, the described BAF of present embodiment also comprises single hole film air diffuser 44, and described single hole film air diffuser 44 is arranged in second supporting layer 14.So be provided with, the bubble diameter that single hole film air diffuser discharges is little, distribution range big and be difficult for being stopped up by foreign material, helps the transfer of air in water.Other composition is identical with embodiment one, two, four, five, six or seven with annexation.
Principle of work:
Physics pretreated sewage and nitrated phegma enter first distributing water room 2 of anoxic biological filter through water inlet manifold 24, close the first backwashing wastewater valve 30 and the second backwashing wastewater valve 34, close the first back flushing blower valve 31, sewage behind first strainer head, 7 water distribution uniformities, upwards flow through successively first supporting layer 4 and first filter material layer 8 (on the filtrate growth have denitrifying bacteria), utilize the nitrate nitrogen in carbon source and the nitrated phegma under anaerobic conditions to carry out denitrification, make nitrate nitrogen be converted into nitrogen and overflow, sewage flows out from first effluent trough 5; In anoxic biological filter rising pipe 25 enters second distributing water room 12 of BAF, while aeration blower 20 aeration in BAF, behind second strainer head, 17 water distribution uniformities, upwards flow through successively second supporting layer 14 and second filter material layer 18 (on the filtrate growth have heterotrophic bacteria and nitrifier), utilize carbon source and ammonia nitrogen in the water respectively, under the situation that aerobic participates in, finish decarburization and nitrification, carbide is changed into carbonic acid gas, and ammonia nitrogen is converted into nitrate nitrogen; Sewage flows out from second effluent trough 15, enter in the clean water basin 41 through anoxic biological filter rising pipe 25, a part of water in the clean water basin 41 pumps into nitrification liquid return line 27 by nitrification liquid reflux pump 21 and is mixed in the anoxic biological filter with pretreated waste water, and the water outlet 35 of another part in clean water basin 41 is discharged in total rising pipe 36.
Anoxic biological filter back flushing working process: backwash process is washed+is washed by air purge+air water successively and forms.At first close the first backwashing wastewater valve 30, during air purge, open the first back flushing blower valve 31, close the second back flushing blower valve 37, open back flushing gas blower 38; During washing, close the second backwashing wastewater valve 34, open backwash pump 22, clear water is in anoxic biological filter back flushing water inlet pipe 29 enters first distributing water room 2 of anoxic biological filter, behind first strainer head, 7 water distribution uniformities, upwards flow through successively first supporting layer 4 and first filter material layer 8, impurity that is retained down between filtrate and blocked up microbial film enter in the first backwashing wastewater groove 9, open the first backwashing wastewater valve 30, and backwashing wastewater flows in the wastewater disposal basin 42; When washing, air water carries out air purge and washing operation simultaneously.
BAF back flushing working process: backwash process is washed+is washed by air purge+air water successively and forms.During air purge, close aeration blower 20, open the second back flushing blower valve 37, close the first back flushing blower valve 31, open back flushing gas blower 38; During washing, open backwash pump 22, clear water is in BAF counter-flushing liquid rising pipe 28 enters second distributing water room 12 of BAF, behind second strainer head, 17 water distribution uniformities, upwards flow through successively second supporting layer 14 and second filter material layer 18, impurity that is retained down between filtrate and blocked up microbial film enter in the second backwashing wastewater groove 19, open the second backwashing wastewater valve 34, backwashing wastewater flows in the wastewater disposal basin 42; When washing, air water carries out air purge and washing operation simultaneously.
Claims (8)
1, the aerobic combined waste disposal plant of a kind of anoxic, described waste disposal plant comprise anoxic biological filter, BAF, clean water basin (41), wastewater disposal basin (42), nitrification liquid reflux pump (21), backwash pump (22) and return of waste water pump (23); It is characterized in that: described anoxic biological filter, BAF, clean water basin (41) and wastewater disposal basin (42) set gradually, described waste disposal plant also comprises water inlet manifold (24), anoxic biological filter rising pipe (25), BAF rising pipe (26), nitrification liquid return line (27), BAF counter-flushing liquid rising pipe (28), anoxic biological filter back flushing water inlet pipe (29), the first backwashing wastewater valve (30), the first back flushing blower valve (31), the first backwashing wastewater rising pipe (32), the second backwashing wastewater rising pipe (33), the second backwashing wastewater valve (34), the second back flushing blower valve (37), back flushing gas blower (38) and air purge backwash tube (39), described anoxic biological filter is by the first pond body (1), first distributing water room (2), plastic ceiling (3), first filter plate (6), first supporting layer (4), several first strainer heads (7), first filter material layer (8), first effluent trough (5) and the first backwashing wastewater groove (9) are formed, be provided with first distributing water room (2) from bottom to top successively in the described first pond body (1), first filter plate (6), first supporting layer (4) and first filter material layer (8), described several first strainer heads (7) are uniform to be arranged on first filter plate (6), described first effluent trough (5) is arranged on the upper right quarter of the first pond body (1), the described first backwashing wastewater groove (9) is arranged on the upper left quarter of the first pond body (1), and described plastic ceiling (3) is installed on the upper surface of the first pond body (1); Described BAF comprises the second pond body (11), second distributing water room (12), second filter plate (16), second supporting layer (14), several second strainer heads (17), second filter material layer (18), second effluent trough (15), the second backwashing wastewater groove (19) and aeration blower (20), be provided with second distributing water room (12) from bottom to top successively in the described second pond body (11), second filter plate (16), second supporting layer (14) and second filter material layer (18), described several second strainer heads (17) are uniform to be arranged on second filter plate (16), described second backwashing wastewater groove (19) and second effluent trough (15) are successively set on the upper right quarter of the second pond body (11), and described aeration blower (20) is arranged on outside the second pond body (11) and with it and is communicated with; Be provided with nitrification liquid reflux pump (21) and backwash pump (22) in the described clean water basin (41), be provided with return of waste water pump (23) in the described wastewater disposal basin (42); One end of described water inlet manifold (24) is communicated with first distributing water room (2), described first effluent trough (5) is communicated with second distributing water room (12) by anoxic biological filter rising pipe (25), described second effluent trough (15) is communicated with clean water basin (41) by BAF rising pipe (26), nitrification liquid reflux pump (21) is communicated with first distributing water room (2) by nitrification liquid return line (27), described backwash pump (22) is communicated with second distributing water room (12) by BAF counter-flushing liquid rising pipe (28), backwash pump (22) is communicated with first distributing water room (2) by anoxic biological filter back flushing water inlet pipe (29), the described first backwashing wastewater groove (9) is communicated with wastewater disposal basin (42) by the first backwashing wastewater rising pipe (32), the described first backwashing wastewater rising pipe (32) is provided with the first backwashing wastewater valve (30), the described second backwashing wastewater groove (19) is communicated with wastewater disposal basin (42) by the second backwashing wastewater rising pipe (33), the described second backwashing wastewater rising pipe (33) is provided with the second backwashing wastewater valve (34), described first distributing water room (2) is communicated with second distributing water room (12) by air purge backwash tube (39), described air purge backwash tube (39) is provided with back flushing gas blower (38), and the air purge backwash tube (39) of back flushing gas blower (38) both sides is provided with the first back flushing blower valve (31) and the second back flushing blower valve (37).
2, the aerobic combined waste disposal plant of a kind of anoxic according to claim 1, it is characterized in that: the spacing of described adjacent two first strainer heads (7) is 500mm.
3, the aerobic combined waste disposal plant of a kind of anoxic according to claim 1 and 2, it is characterized in that: the spacing of described adjacent two second strainer heads (17) is 500mm.
4, the aerobic combined waste disposal plant of a kind of anoxic according to claim 3 is characterized in that: the filtrate in first filter material layer (8) is to be that the biological ceramic particle of 6-9mm constitutes by particle diameter, and the thickness of first filter material layer (8) is 2.5～3.5m.
5, the aerobic combined waste disposal plant of a kind of anoxic according to claim 3 is characterized in that: the filtrate in second filter material layer (18) is to be that the biological ceramic particle of 4-6mm constitutes by particle diameter, and the thickness of second filter material layer (18) is 3.5～4.2m.
6, the aerobic combined waste disposal plant of a kind of anoxic according to claim 3 is characterized in that: first supporting layer (4) in the described anoxic biological filter is made up of three layers of gravel; The particle diameter of lower floor's gravel is 4～8mm, and thickness is 0.1m; The particle diameter of middle layer gravel is 8～16mm, and thickness is 0.1m; The particle diameter of upper strata gravel is 16～32mm, and thickness is 0.1m.
7, the aerobic combined waste disposal plant of a kind of anoxic according to claim 3 is characterized in that: second supporting layer (14) in the BAF is made up of three layers of gravel; The particle diameter of lower floor's gravel is 4～8mm, and thickness is 0.1m; The particle diameter of middle layer gravel is 8～16mm, and thickness is 0.1m; The particle diameter of upper strata gravel is 16～32mm, and thickness is 0.1m.
8, according to claim 1,2,4,5, the aerobic combined waste disposal plant of 6 or 7 described a kind of anoxics, it is characterized in that: described BAF also comprises single hole film air diffuser (44), and described single hole film air diffuser (44) is arranged in second supporting layer (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920099556U CN201376919Y (en) | 2009-04-10 | 2009-04-10 | Anoxic-aerobic combined type sewage treatment unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920099556U CN201376919Y (en) | 2009-04-10 | 2009-04-10 | Anoxic-aerobic combined type sewage treatment unit |
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| CN201376919Y true CN201376919Y (en) | 2010-01-06 |
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| CN200920099556U Expired - Fee Related CN201376919Y (en) | 2009-04-10 | 2009-04-10 | Anoxic-aerobic combined type sewage treatment unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214090A (en) * | 2013-05-16 | 2013-07-24 | 南京大学 | Anoxic humic filler filter tank and method for treating nitrogen containing degradation-resistant wastewater |
| CN103641241A (en) * | 2013-12-17 | 2014-03-19 | 南京大学 | Preposed denitrification aeration biofilter and method for treating sewage |
| CN106517515A (en) * | 2016-10-21 | 2017-03-22 | 中海油天津化工研究设计院有限公司 | Deep treatment system and method for ozone combined biological filters |
| CN111943431A (en) * | 2020-08-11 | 2020-11-17 | 北京林业大学 | Device and method for removing nitrate in underground water based on multi-stage filter |
| CN112811611A (en) * | 2021-02-22 | 2021-05-18 | 青海洁神环境能源产业有限公司 | Double-group B-BAF filter tank device and sewage denitrification treatment method |
-
2009
- 2009-04-10 CN CN200920099556U patent/CN201376919Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214090A (en) * | 2013-05-16 | 2013-07-24 | 南京大学 | Anoxic humic filler filter tank and method for treating nitrogen containing degradation-resistant wastewater |
| CN103214090B (en) * | 2013-05-16 | 2014-06-11 | 南京大学 | Anoxic humic filler filter tank and method for treating nitrogen containing degradation-resistant wastewater |
| CN103641241A (en) * | 2013-12-17 | 2014-03-19 | 南京大学 | Preposed denitrification aeration biofilter and method for treating sewage |
| CN103641241B (en) * | 2013-12-17 | 2015-04-01 | 南京大学 | Preposed denitrification aeration biofilter and method for treating sewage |
| CN106517515A (en) * | 2016-10-21 | 2017-03-22 | 中海油天津化工研究设计院有限公司 | Deep treatment system and method for ozone combined biological filters |
| CN111943431A (en) * | 2020-08-11 | 2020-11-17 | 北京林业大学 | Device and method for removing nitrate in underground water based on multi-stage filter |
| CN112811611A (en) * | 2021-02-22 | 2021-05-18 | 青海洁神环境能源产业有限公司 | Double-group B-BAF filter tank device and sewage denitrification treatment method |
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