CN201990579U - Bilayer biology-sand filter - Google Patents
Bilayer biology-sand filter Download PDFInfo
- Publication number
- CN201990579U CN201990579U CN2011200443764U CN201120044376U CN201990579U CN 201990579 U CN201990579 U CN 201990579U CN 2011200443764 U CN2011200443764 U CN 2011200443764U CN 201120044376 U CN201120044376 U CN 201120044376U CN 201990579 U CN201990579 U CN 201990579U
- Authority
- CN
- China
- Prior art keywords
- filter
- water
- biology
- water inlet
- filtrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model relates to a bilayer biology-sand filter. A water inlet groove is installed on top of a filter, a water outlet pipe is installed at the bottom of the filter, and the water inlet groove is connected to a water inlet pipe. The bilayer biology-sand filter is characterized by comprising an upper layer filter material operating according to BAF (biological aerated filters) and a lower layer filter material operating according to rapid filters. A bedding layer is arranged under each layer filter material, the upper layer filter material and the lower layer filter material are separated by a filter plate, and an aerator pipe is arranged under the filter plate and connected with an air blower. The water inlet pipe is connected to a real-time on-line monitoring-feedforward control system. A backwashing water pump, a backwashing air pump and a filtering nozzle are arranged at the bottom of the filter, and a backwashing water outlet pipe and a backwashing water outlet valve are installed on top of filter materials. NH3-N (ammonia water- nitrogen), TN (total nitrogen), TP (total phosphorus) and SS (suspended matter) in outflowing water are ensured to meet the Level 1 standard A of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant continuously and stably.
Description
Technical field
The utility model relates to a kind of multifunction double-layer biology-sand filter, belongs to the city sewage deep treatment field.
Background technology
Generally speaking, the principal element that causes body eutrophication is exceeding standard of nitrogen and phosphorus.After general Sewage Plant adopted the biological process denitrogenation dephosphorizing, nitrogen in the secondary effluent and phosphorus were still superfluous, can not reach the one-level A standard of " municipal sewage plant's pollutant emission standard ".Therefore need to increase the technology of advanced treatment, further reduce indexs such as nitrogen in the secondary effluent and phosphorus.
BAF (BAF) is a kind of new bio filter tank with bio-contact oxidation mechanism and the combination of deep-bed filtration mechanism.Mainly solve NH in the secondary effluent
3The too high NH that causes of-N or nitric nitrogen
3Problems such as-N or TN exceed standard.As a kind of microbial film phase reactor, BAF integrates contaminant degradation, solid-liquid separation function, the mechanism that sewage treatment process relates to comprises: microbiological oxidation Decomposition, filler and biomembranous absorption crown_interception in the microbial film of growing on the filler in the denitrification of inner microenvironment of the nitrification in the aerobic environment of filter tank, microbial film and anaerobism section, the reactor, and the food chain classification predation that forms along water (flow) direction etc.
Filtrate is the key that can BAF bring into play good treatment effect, and the filtrate general requirement specific surface area of BAF is big, the porosity height, particle diameter suitable (3 ~ 6mm), the physical strength height, chemistry and biologically stable are good.Like this, microorganism easily is adsorbed in its surface, and with quick formation microbial film, and filtrate can play a protective role to the microbial film that forms, and its shearing of avoiding current is washed away.Studies show that, zeolite is the filtrate of a kind of BAF of being very suitable for, it is the general name of the moisture silicon of gang's porousness (aluminium) hydrochlorate mineral, a lot of holes and duct are arranged in the structure, unique skeleton structure makes zeolite have following performance: (1) absorption property, natural zeolite have the big (440 ~ 1030m of specific surface area
3/ g), the uniform characteristics in aperture, in case, will embody extremely strong adsorptive power when the hole and the duct vacancy of zeolite inside; (2) cation exchange property, silicon (aluminium) oxygen tetrahedron generally has negative electricity, very easily the NH in the planar water
4 +Positively charged ions such as-N; (3) catalytic performance, when certain reaction was posted on the big hole top layer that invests zeolite crystal inside, its speed of response was accelerated to some extent; (4) have good chemistry and biologically stable.When zeolite is used as the BAF filtrate, play synergy with microbial film, that is: zeolite is by the NH in the ion exchange planar water
4 +-N, organic pollutant in its surperficial microbial film degradation water and the NH that is adsorbed
4 +-N makes zeolite regeneration, improves the nitrated usefulness of reactor, makes BAF can bear higher NH
3-N impact load.But owing to have water molecules and impurity in the molecule duct of zeolite, exchange and adsorptive power are limited, and physical strength is generally lower, are vulnerable to destroy and wearing and tearing.Therefore, need in actual use zeolite is carried out modification.
The denitrification effect of BAF is better, but phosphor-removing effect is relatively poor.BAF running example from present is difficult to reach emission standard with biological phosphate-eliminating fully, and the auxiliary usually method with chemical dephosphorization reduces water outlet TP.
In addition, the water outlet of most of Sewage Plant second pond is because the existence of microorganism flco, the problem that generally has SS to exceed standard, and the filtrate in the biological filter can not be held back some less suspended substances and microorganism flco in the sewage, even under most situation, because biological filter itself is biomembranous to come off, make the effluent SS of biological filter many more than 10mg/L, can not satisfy emission standard.At present, widely used little flocculation-sand filtration technology, is held back flocs unit by follow-up quartz sand filtration with the phosphoric acid salt formation flocs unit precipitation in the sewage by adding flocculation agent, can guarantee effectively that water outlet TP and SS are up to standard.
Existing most of city domestic sewage factory is because the complicacy of city planting ductwork, the capital has the part trade effluent to enter, hazardous and noxious substances wherein can cause unpredictalbe impact to the microflora of second-stage treatment, and because season, the difference of factors such as operational condition, the treatment effect of two stage biological treatment system can produce bigger fluctuation.All kinds of advanced treatment process are difficult to remove different times all the time effectively because of its function singleness, and the pollutents that exceed standard different in the secondary effluent are (as NH
3-N, TN, TP, SS), therefore, need a kind of reactor that possesses Interactive function now, can be applied to different quality pointedly.But the BAF that with modified zeolite is filtrate combines with little flocculation-sand filter, and the technology that is used for removing synchronously the different pollutents that exceed standard in the secondary effluent yet there are no report.
The utility model content
The utility model is big at Sewage Plant two stage biological treat effluent variation water quality, and the advanced treatment apparatus of simple function is difficult to effectively remove all the time the problem of the different pollutents that exceed standard, and a kind of double-deck biology-sand filter with real-time monitoring feedback control function is provided.
In order to realize above-mentioned technical problem, the present invention implements by following technical scheme:
Double-deck biology-sand filter, be installed into tank at the top, filter tank, rising pipe is installed in the bottom, inlet flume is connected to water inlet pipe, it is characterized in that also comprising by the upper strata filter material layer of BAF operation with by lower floor's filter material layer of conventional rapid filter operation, bed course all is set below every metafiltration bed of material, separate with filter plate between the levels filter material layer, filter plate has aeration tube, and aeration tube is connected with gas blower; Connect real time on-line monitoring-feedforward control system on the water inlet pipe.
Aforesaid double-deck biology-sand filter, the probe that comprises of described real time on-line monitoring-feedforward control system is concentrated case, NH
3-N on line analyzer, TN on line analyzer, TP on line analyzer and PLC control substation, wherein NH
3-N on line analyzer, TN on line analyzer, TP on line analyzer are connected in parallel on the input terminus that probe is concentrated case and PLC control substation, and the output terminal of PLC control substation adopts four kinds of modes to export, and wherein a kind of is to be connected to water inlet pipe through intake pump; Another kind is to be connected to water inlet pipe through dosing pump, flocculation agent dissolving tank; Another is to be connected directly to entering water electromagnetic valve, and at last a kind of is to be connected to aeration tube through gas blower.
Aforesaid double-deck biology-sand filter is characterized in that in the bottom in described filter tank backwash pump, back flushing air pump and filter being set, and the top of filter tank filtrate is provided with the back flushing rising pipe, and the back flushing outlet valve is installed.
Aforesaid double-deck biology-sand filter, the material that it is characterized in that described upper strata filter material layer is the modified zeolite filtrate, and lower floor's filter material layer material is a quartz sand filter media, and described bed course material is a cobble.
Characteristics of the present utility model are comprehensive and handinesies of reactive system.
The utility model can be regulated operation condition according to the water quality situation of different sewage factory secondary effluent, same filter tank is had respectively at different times strengthen nitrated, intensified anti-nitrated, reinforced phosphor-removing or the effect of denitrogenation dephosphorizing simultaneously, makes the NH in the water outlet
3-N, TN, TP and SS simultaneously, continue to reach the one-level A standard of " municipal sewage plant's pollutant emission standard ", be a kind of flexible and changeable, can adapt to the city sewage deep treatment device of various water quality.
Description of drawings
Fig. 1 is double-deck biology-sand filter synoptic diagram.
Among Fig. 1,1-modified zeolite filtrate, 2-quartz sand filter media, 3-cobble bed course, the prefabricated filter plate of 4-, 5-inlet flume, 6-intake pump, 7-rising pipe, the 8-entering water electromagnetic valve, 9-dosing pump, 10-flocculation agent dissolving tank, 11-gas blower, 12-aeration tube and aeration head, 13-backwash pump, 14-back flushing air pump, 15-strainer head, 16-back flushing rising pipe, 17-back flushing rising pipe, 18-back flushing outlet valve, 19-back flushing outlet valve, the 20-probe is concentrated case, 21-NH
3-N on line analyzer, the 22-TN on line analyzer, the 23-TP on line analyzer, 24-PLC controls substation.
Solid line is represented waterline among the figure, and dotted line is represented the electric wire of real time on-line monitoring-feedforward control system.
Embodiment
Following content will be done further specific descriptions to the utility model in conjunction with the accompanying drawings:
Double-deck biology-sand filter comprises that modified zeolite filtrate 1(zeolite for the using natural clinoptilolite available from the prosperous commerce and trade of Beijing Kang Wen limited liability company, obtains through the laboratory modification.) and quartz sand filter media 2(available from source water-purifying material factory of Gongyi City, Henan Province section, specification is 4 ~ 8mm.) double-layer filter material, wherein modified zeolite filtrate 1 is the upper strata filtrate, presses the BAF operation, is used to remove organism, and is nitrated/denitrification denitrogenation; Quartz sand filter media 2 is lower floor's filtrate, presses the conventional rapid filter operation, is used for removing upper strata BAF is free in water because of biofilm detachment microorganism flco.All be provided with cobble bed course 3 under every metafiltration material, the control filtrate runs off, separate with prefabricated filter plate 4 between the two-layer filtrate, avoided two-layer filtrate generation inconsistent phenomenon in operation and the backwash process, prefabricated filter plate 4 has aeration tube and aeration head 12, be connected with gas blower 11, be used for upper strata BAF is carried out oxygen supply.Go out under the sewage of upper strata modified zeolite filtrate 1 is enterprising, water inlet flows into inlet flume 5 by intake pump 6, and the supreme metafiltration material of overflow water distribution, rising pipe 7 are positioned at the bottom, filter tank.Dosing pump 9 is added to the aluminium salt inorganic flocculating agent of flocculation agent dissolving tank 10 in the water inlet pipe, forms little flocs unit by the phosphoric acid salt in line-blending effect and the water inlet.
The preparation of modified zeolite filtrate 1 is with reference to the method for modifying among the Xiao Wenjun " modified micropore prepare zeolite and the research of removing ammonia nitrogen in the micro-polluted source water thereof ", using natural clinoptilolite is made the spherical filtrate of modified micropore through operations such as fragmentation, grinding, screening, the activation of NaCl salts solution, zeolite ball forming, sintering curings, zeolite filler particle diameter after the modification suitable (3 ~ 6mm), particle size distribution range is narrow, physical strength improves greatly, to NH
3The removal effect of-N, COD makes moderate progress.
The NH of real time on-line monitoring-feedforward control system
3The probe that-N, TN, TP probe are provided with on the water inlet pipe is concentrated in the case 20 NH
3-N on line analyzer 21, TN on line analyzer 22, TP on line analyzer 23 are transferred to PLC control substation 24 with the water quality data of water inlet, the latter sends instruction according to the feed forward control program based on influent quality that computer is set in advance, regulate the flow of intake pump 6, the aperture of magnetic valve 8, the flow of dosing pump 9, the parameters such as air demand of gas blower 11, obtain different operation conditions, to realize removing targetedly the purpose of different pollutents.The substation 24 of PLC control simultaneously can interrelate by the robot control system(RCS) of EPA and entire sewage factory, realizes monitoring and the Artificial Control of central key-course to double-deck biology-sand filter.
In the utility model, during back flushing, go out on advancing under backwashing water, the gas, backwashing water is provided by backwash pump 13, and backwash gas is provided by back flushing air pump 14.The gentle strainer head 15 that lays from the quartz sand filter media bottom of backwashing water enters, backwash mode adopt pulsed gas dash-water dashes the mode that combines, promptly water floats all the time, the gas that intermittence is carried out certain intensity dashes, make filtering layer be in the speed change swelling state all the time, increase shearing, impact effect, the backwashing period of upper strata modified zeolite is the integral multiple of the backwashing period of lower floor's quartz sand, every metafiltration material top at device is established back flushing rising pipe 16 and back flushing rising pipe 17 respectively, is used for the eliminating of different filtrate backwashing waters, gas.
Embodiment 1
When the real time on-line monitoring instrument shows secondary effluent NH
3-N〉during 5mg/L, PLC control substation 24 is regulated intake pump 6 and entering water electromagnetic valve 8 according to the feed forward control program, makes into water NH
3-N load remains on 3kgNH
3-N/ (m
3D) below, this moment, sewage was successively by upper and lower metafiltration material.Gas blower 11 is regulated in 24 interlocks of PLC control substation, increases aeration rate, improves the dissolved oxygen of upper strata modified zeolite filtrate 1, makes gas-water ratio maintain 1:1 ~ 3:1, to keep the aerobic environment in filter tank, strengthens the activity of nitrobacteria, makes the NH in the water outlet
3-N is up to standard.Simultaneously, upper strata filtrate water outlet enters lower floor's quartz sand filter media 2, holds back the microbial film flco that comes off, and guarantees that the SS of final outflow water is up to standard.
Embodiment 2
When the real time on-line monitoring instrument shows secondary effluent TN〉during 15mg/L, PLC control substation 24 is regulated intake pump 6 and entering water electromagnetic valve 8 according to the feed forward control program, and making into, water TN load remains on 7kgNO
3 --N/ (m
3D) below, this moment, sewage was successively by upper and lower metafiltration material.Gas blower 11 is regulated in 24 interlocks of PLC control substation, reduces aeration rate, reduces the dissolved oxygen of upper strata modified zeolite filtrate 1, and gas-water ratio is maintained below the 1:1, to keep the filter tank anaerobic environment, improves the activity of denitrifying bacterium, makes the TN in the water outlet up to standard.Similarly, upper strata filtrate water outlet enters lower floor's quartz sand filter media 2, guarantees that the SS of final outflow water is up to standard.
Embodiment 3
When the real time on-line monitoring instrument shows secondary effluent TP〉during 0.5mg/L, PLC control substation 24 is regulated intake pump 6 and entering water electromagnetic valve 8 according to the feed forward control program, make into water successively by upper and lower metafiltration material, gas blower 11 is regulated in 24 interlocks of PLC control substation, only upper strata modified zeolite filtrate is carried out a small amount of aeration, keep the filter material surface microbic activity.PLC control substation 24 starts dosing pump 9 simultaneously automatically, adds an amount of flocculation agent, and the orthophosphoric acid salt in flocculation agent and the sewage is by the line-blending effect, produce flocs unit, in the access to plant, utilize the precipitation crown_interception of quartz sand filter media, guarantee that the SS and the TP of final outflow water is up to standard.
Embodiment 4
When the real time on-line monitoring instrument shows secondary effluent NH
3-N〉5mg/L and TP〉during 0.5mg/L, PLC control substation is regulated intake pump 6 and entering water electromagnetic valve 8 according to the feed forward control program, makes into water NH
3-N load remains on 3kgNH
3-N/ (m
3D) below, this moment, sewage was successively by upper and lower metafiltration material.Gas blower 11 is regulated in 24 interlocks of PLC control substation, makes gas-water ratio maintain 1:1 ~ 3:1, strengthens the nitrification of BAF, makes NH
3-N is up to standard; PLC control substation 24 starts dosing pump 9 simultaneously, makes the phosphoric acid salt in flocs unit and the water form flco, and the little flocculation-sand filtration effect of performance lower floor filtrate makes water outlet TP and SS also simultaneously up to standard.
When the real time on-line monitoring instrument shows secondary effluent TN〉15mg/L and TP〉during 0.5mg/L, PLC control substation 24 is regulated intake pump 6 and entering water electromagnetic valve 8 according to the feed forward control program, makes into water NH
3-N load remains on 7kgNO
3 --N/ (m
3D) below, this moment, sewage was successively by upper and lower metafiltration material.Gas blower 11 is regulated in 24 interlocks of PLC control substation, and gas-water ratio is maintained below the 1:1, strengthens the denitrification of BAF, makes water outlet TN up to standard; PLC control substation 24 starts dosing pump 9 simultaneously, by chemical dephosphorization and sand filtration effect, makes water outlet TP and SS also simultaneously up to standard.
Backwash mode:
The backwash mode of this multifunction double-layer biology-sand filter adopt pulsed gas dash-water dashes the mode that combines, promptly water floats all the time, the gas that intermittence is carried out certain intensity dashes.The intensity of backwashing water is 4 ~ 5L/ (m
2S), the intensity of backwash gas is 10 ~ 12L/ (m
2S).The air inlet of back flushing and water inlet all are the modes that adopts from bottom to top, and the strainer head 15 that is laid by the bottom, filter tank enters in the filter tank backwashing time 5 ~ 10min.The back flushing frequency of quartz sand filter media 2 is higher than the back flushing frequency of modified zeolite filtrate 1, and (48 ~ 96h) is cycle (24 ~ 48h) the integral multiple of lower floor's quartz sand filter media 2 to keep the backwashing period of upper strata modified zeolite filtrate 1.
The backwash process of multifunction double-layer biology-sand filter can be realized two kinds of operating modes: if only need lower floor's quartz sand filter media is carried out back flushing, valve 19 in the middle of then opening on the back flushing water shoot, close the valve 18 on the top back flushing water shoot, the back flushing G﹠W is directly discharged, without the upper strata filtrate by intermediary back flushing water shoot 17; If the upper strata biofilter material has also reached corresponding backwashing period, then close the valve 19 on the intermediary back flushing water shoot, valve 18 on the open top part back flushing water shoot, make the back flushing G﹠W flow through upper and lower metafiltration material successively, exhaust and water outlet are all discharged by the back flushing water shoot 16 on upper strata.
Above-mentioned embodiment does not limit the technical solution of the utility model in any form, and the technical scheme that mode obtained that every employing is equal to replacement or equivalent transformation all drops on protection domain of the present utility model.
Claims (4)
1. double-deck biology-sand filter, be installed into tank at the top, filter tank, rising pipe is installed in the bottom, inlet flume connects water inlet pipe, it is characterized in that in the filter tank filling by the upper strata filter material layer of BAF operation with by lower floor's filter material layer of conventional rapid filter operation, bed course all is set below every metafiltration bed of material, separate with filter plate between the levels filtrate, filter plate has aeration tube, and aeration tube is connected with gas blower; Connect real time on-line monitoring-feedforward control system on the water inlet pipe.
2. double-deck biology-sand filter according to claim 1 is characterized in that described real time on-line monitoring-feedforward control system comprises the concentrated case of probe, NH
3-N on line analyzer, TN on line analyzer, TP on line analyzer and PLC control substation, wherein NH
3-N on line analyzer, TN on line analyzer, TP on line analyzer are connected in parallel on the input terminus that probe is concentrated case and PLC control substation, and the output terminal of PLC control substation adopts four approach outputs, and wherein one is to be connected to water inlet pipe through intake pump; Another is to be connected to water inlet pipe through dosing pump, flocculation agent dissolving tank; One is to be connected directly to entering water electromagnetic valve again, and the last item is to be connected to aeration tube through gas blower.
3. double-deck biology-sand filter according to claim 1 is characterized in that in the bottom in described filter tank backwash pump, back flushing air pump and filter being set, and the top of filter tank filtrate is provided with the back flushing rising pipe, and the back flushing outlet valve is installed.
4. double-deck biology-sand filter according to claim 1, the material that it is characterized in that described upper strata filter material layer is the modified zeolite filtrate, and lower floor's filter material layer material is a quartz sand filter media, and described bed course material is a cobble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200443764U CN201990579U (en) | 2011-02-22 | 2011-02-22 | Bilayer biology-sand filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200443764U CN201990579U (en) | 2011-02-22 | 2011-02-22 | Bilayer biology-sand filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201990579U true CN201990579U (en) | 2011-09-28 |
Family
ID=44667074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200443764U Expired - Fee Related CN201990579U (en) | 2011-02-22 | 2011-02-22 | Bilayer biology-sand filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201990579U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583743A (en) * | 2012-03-02 | 2012-07-18 | 北京工业大学 | Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method |
| CN106823499A (en) * | 2017-03-13 | 2017-06-13 | 尚川（北京）水务有限公司 | A kind of non-recoil wash water pump is from the energy-saving sand filtration cell system of water washing efficient |
| CN106946343A (en) * | 2017-05-03 | 2017-07-14 | 山东毅康科技股份有限公司 | A kind of efficiently backwash BAF |
| CN106976960A (en) * | 2017-04-21 | 2017-07-25 | 徐州工程学院 | A kind of tower biological filter for Treating Municipal Sewage |
| CN107500401A (en) * | 2017-09-18 | 2017-12-22 | 深圳市清研环境科技有限公司 | A kind of ecological filter and its application method for advanced treatment of wastewater |
| CN109399805A (en) * | 2018-10-29 | 2019-03-01 | 安徽京望环保科技有限公司 | A kind of circulating biological filter tank sewage treatment process and device |
-
2011
- 2011-02-22 CN CN2011200443764U patent/CN201990579U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583743A (en) * | 2012-03-02 | 2012-07-18 | 北京工业大学 | Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method |
| CN102583743B (en) * | 2012-03-02 | 2013-10-23 | 北京工业大学 | Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method |
| CN106823499A (en) * | 2017-03-13 | 2017-06-13 | 尚川（北京）水务有限公司 | A kind of non-recoil wash water pump is from the energy-saving sand filtration cell system of water washing efficient |
| CN106976960A (en) * | 2017-04-21 | 2017-07-25 | 徐州工程学院 | A kind of tower biological filter for Treating Municipal Sewage |
| CN106946343A (en) * | 2017-05-03 | 2017-07-14 | 山东毅康科技股份有限公司 | A kind of efficiently backwash BAF |
| CN107500401A (en) * | 2017-09-18 | 2017-12-22 | 深圳市清研环境科技有限公司 | A kind of ecological filter and its application method for advanced treatment of wastewater |
| CN109399805A (en) * | 2018-10-29 | 2019-03-01 | 安徽京望环保科技有限公司 | A kind of circulating biological filter tank sewage treatment process and device |
| CN109399805B (en) * | 2018-10-29 | 2021-07-13 | 安徽京望环保科技有限公司 | Circulating biological filter sewage treatment process and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9045356B2 (en) | Sewage treatment process and system | |
| CN101618923B (en) | Wastewater treatment method | |
| CN201990579U (en) | Bilayer biology-sand filter | |
| CN106277558A (en) | A kind of integrate process for removing nitrogen and phosphor from sewage and the device that physical biochemistry filters | |
| CN106673373A (en) | Sustainable and efficient sewage treatment system | |
| CN205773937U (en) | A kind of ozone occurs and processing means | |
| CN103848538A (en) | Reactor and method for removing ammonia nitrogen in drinking water by virtue of enhanced filter and method thereof | |
| CN106977042A (en) | A kind of modularization integrated approach handled suitable for soy sauce brewing wastewater | |
| CN108793396A (en) | A kind of denitrification and dephosphorization method of denitrification dephosphorization apparatus, construction method and sewage | |
| CN108793395A (en) | Construction method, denitrification dephosphorization apparatus and the denitrification and dephosphorization method of denitrification dephosphorization apparatus | |
| CN110720420A (en) | Take water farming systems of anaerobism denitrification facility | |
| CN107973488B (en) | Method for denitrification treatment of ammonia nitrogen wastewater | |
| CN113264586A (en) | MBR (membrane bioreactor) process for treating nitrate wastewater | |
| CN103739172B (en) | Water circulating and reusing method for industrial parks | |
| CN105110556A (en) | Integrated denitrification decarbonization biological aerated filter and processing system thereof | |
| CN210559637U (en) | Novel moving bed biofilm reactor for sewage treatment | |
| KR101186606B1 (en) | Advanced treatment apparatus to removing nitrogen and phosphorus from wastewater | |
| CN102887613A (en) | Treatment method for high-concentration industrial wastewater | |
| CN208071544U (en) | A kind of railway communication system production wastewater treatment system | |
| CN1318328C (en) | Process for treating organic sewage by three section method and its apparatus | |
| CN201648181U (en) | Pre-denitrification aeration biological filter | |
| CN208022780U (en) | A kind of up flow type water distribution gas distribution denitrification and nitrosation biofilter | |
| CN209619106U (en) | Domestic sewage processing system | |
| CN102617003A (en) | Biofilter combination system for upgrading and reconstructing sewage plant | |
| CN207567066U (en) | Sewage disposal device based on catalytic oxidation combination complex media filtration system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20140222 |