WO2018103537A1 - 水平流砂滤池及其水处理工艺 - Google Patents
水平流砂滤池及其水处理工艺 Download PDFInfo
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- WO2018103537A1 WO2018103537A1 PCT/CN2017/112605 CN2017112605W WO2018103537A1 WO 2018103537 A1 WO2018103537 A1 WO 2018103537A1 CN 2017112605 W CN2017112605 W CN 2017112605W WO 2018103537 A1 WO2018103537 A1 WO 2018103537A1
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- Prior art keywords
- water
- sand filter
- pipe
- sand
- distribution device
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/002—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with multiple filtering elements in parallel connection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/38—Feed or discharge devices
- B01D24/40—Feed or discharge devices for feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/04—Aerobic processes using trickle filters
- C02F3/046—Soil filtration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- the invention relates to a water treatment device, in particular to a horizontal flow sand filter and a water treatment process thereof.
- the sand filter is a typical filter filtration device that uses the surface area provided by the filter granular material to retain solid particles and colloids in the water to clarify the water.
- the sand filter can intercept impurities in water which are much smaller than the gap of the filter material, mainly through contact flocculation, followed by sieve filtration and precipitation. Because the sand filter has many advantages such as large decontamination capacity, long working period and reliable operation, it is widely used in the advanced treatment of feed water treatment or sewage after secondary treatment.
- the operation of the sand filter is mainly a cycle of filtration and backwashing.
- the raw water filtration process is only carried out in the vertical direction, the filtration area is limited by the horizontal cross-sectional area of the equipment, and the sand layer is not fully utilized; the sand rinsing process, all the sand grains are mixed, and the dirtiness of the sand particles cannot be targeted. Perform classification processing.
- a horizontal flow sand filter comprises a pool body, a raw water inlet component, a sand filter bed, a filtered water outlet component, an aeration component and a backwashing component,
- the sand filter bed is arranged in the pool body and is composed of filter sand;
- the raw water inlet component comprises an inlet pipe and a water distribution device for feeding the raw water into the sand filter bed, the inlet pipe is connected with the water distribution device, the water distribution device is arranged in the sand filter bed, and the water distribution device has a plurality of distribution surfaces.
- Outlet channel ;
- the side of the water collector adjacent to the sand filter bed has an inlet water passage, and the outlet pipe is connected with the water collector;
- the backwashing assembly includes a backwashing pipe and a draining pipe, and the backwashing pipe is connected to the outlet pipe, and the draining pipe is connected to the water discharging device.
- the water distribution device is disposed in the axial direction of the cell body; or is disposed on the outer wall of the sand filter bed.
- the pool body is made of concrete. According to different process requirements, the pool body can also be made of other materials, such as steel, acrylic and so on.
- the water distribution device is a water distribution riser having a water outlet.
- the water distribution device is surrounded by a sieve plate having a wedge-shaped wire filtering surface, or one of a perforated pipe, a slit sieve, or a combination of the above; the water collection The device is enclosed by a sieve plate having a wedge-shaped wire filtering surface, or one of a perforated pipe, a slit sieve, a microfiltration membrane, an ultrafiltration membrane, or a combination of the above.
- the layout of the water distribution device adopts a plurality of configurations such as a rectangle, a circle, a ring or a line, or a combination of the above.
- the sump comprises a sieve plate and a cover plate located at the lower ends of the sieve plate, and the sieve plate and the two cover plates form a water collecting space in the pool body.
- the water collector is disposed in the axial direction of the sand filter bed.
- the sieve plates in the water collector are continuous or spaced arcs, ladder pieces, bent pieces, flat sheets or other geometric forms of sheet-like structures along the inner wall of the pool, and the convex orientation of the sieve plates
- the inside of the pool; or, the sieve plate is a cylinder with a water distribution hole.
- the sieve plates can also be set to other forms, such as a continuous continuous piece, a rectangular piece spacing type, and the like.
- the water collector is provided with at least one branch water collecting pipe communicating with the outside of the pool body, and the outlets of the respective branch water collecting pipes are connected to the water outlet pipe outside the pool.
- the aeration assembly is composed of an aeration tube and a plurality of aeration devices connected to the aeration tube, and the aeration assembly is installed at the bottom of the pool body.
- valves are provided on each of the inlet pipe, the outlet pipe, the backwash pipe, and the sewage pipe.
- the backwashing component is provided with a backwashing water tank for storing part of the filtered water, and the filtered water is used as flushing water for the rinsing process, which can greatly reduce the clean water consumption.
- the aeration device is a sieve plate having a wedge-shaped wire filtering surface.
- the aeration device can also be provided in other forms, such as a perforated tube, a slotted screen, or a rigid air distribution device of appropriate form/strength, or a combination thereof.
- a water treatment process for a horizontal flow sand filter comprising the following two processes;
- Filtration process the raw water enters the horizontal flow sand filter through the inlet pipe, and smoothly enters the sand filter bed through the water outlet channel of the water distribution device, and filters the sand from the inside to the outside or from the outside to the inside in the horizontal direction of the pool; In the water, suspended particles or contaminants in the water are intercepted by sand particles, and radial filtration maximizes the efficiency of the sand filter; finally, the filtered water is collected by the water collector and sent to the outlet pipe for discharge;
- Another water treatment process for a horizontal flow sand filter comprising the following two processes;
- Biological filtration process Under suitable culture conditions, a gel-like biofilm is formed on the surface of the filter sand, and the raw water enters the horizontal flow sand filter through the inlet pipe, and enters the sand filter bed evenly and smoothly through the outlet channel of the water distribution device. And filtering sand along the horizontal direction of the pool body from the inside to the outside or from the outside to the inside; the aeration component is opened, and the compressed air is released into the sand filter tank from the bottom to the bottom through the aeration assembly in the form of small bubbles, and the oxygen is fully supplied.
- the soluble, gelatinous and suspended substances in the raw water are adsorbed on the biofilm and decomposed by the microorganisms; finally, the filtered water is collected by the water collector and discharged to the outlet pipe;
- a portion of the filtered water is temporarily stored in the backwash water tank and reused as flush water during subsequent backwashing.
- the horizontal flow sand filter of the invention can realize the following functions:
- the raw water enters the sand filter bed from the bottom water distributor, and is filtered from bottom to top, and the filtration area is only the horizontal cross-sectional area of the sand filter bed.
- the raw water horizontal flow filter bed greatly increases the filtration area, thereby improving the effluent water quality and reducing the amount of filter sand.
- the horizontal flow sand filter of the invention can be used not only as a filtering device, but also can be used to fix the biofilm by using the sand filter material under suitable culture conditions, and becomes a biological reaction pool integrating the biological contact oxidation and the retention function of the suspension filter bed. It can effectively remove solid suspended solids in water and reduce COD, BOD, turbidity and chromaticity.
- Figure 1 is a front elevational view showing the horizontal flow sand filter of the present invention
- FIG. 2 is a left side view of the horizontal flow sand filter of the present invention
- Figure 2-1 is an enlarged view of A in Figure 2;
- FIG. 3 is a top plan view of a horizontal flow sand filter of the present invention.
- FIG. 4 is a top plan view of a horizontal flow sand filter of the present invention.
- a horizontal flow sand filter is composed of a pool body 1, a raw water inlet assembly, a sand filter bed 4, a filtered water outlet assembly, an aeration assembly, and a counter. Flush the components.
- the function of the raw water inlet component is to feed the raw water into the sand filter bed 4 and evenly distribute it.
- the pool body 1 is rectangular and made of concrete
- the raw water inlet assembly is composed of an inlet pipe 2 and a water distribution device 3 connected to the inlet pipe 2, and the inlet pipe 2 is provided with a valve for introducing raw water into the horizontal flow sand filter; the water distribution device 3 is 4 cloths.
- the water riser and the water riser are evenly distributed with water outlet channels, and each of the water risers is vertically disposed in the sand filter bed 4 and evenly distributed.
- the water distribution pipe can be enclosed by a sieve plate having a wedge-shaped wire filtering surface, and the raw water passes through the sieve slit of the sieve plate and smoothly enters the sand filter bed 4.
- the water distribution structure of the water distribution pipe of the present invention is not limited thereto, and this example is only preferred.
- the sand filter bed 4 is composed of filter sand, is located in the tank body 1 and extends upward from the bottom of the tank body 1 for filtering raw water; the filter sand is the main material for purifying and filtering the raw water, and quartz sand, activated carbon, anthracite, glass ball can be selected.
- filter media such as ceramsite
- the type of filter sand and particle gradation should be selected according to the raw water quality and the water quality requirements of the filtered water.
- the filtered water outlet assembly is composed of a sump 5, a branch collecting pipe 6 and an outlet pipe 7;
- the sump 5 includes a sieve plate 51 having a wedge-shaped wire filtering surface and a cover plate 52 located at upper and lower ends of the sieve plate 51,
- the sieve plate 51 and the two cover plates 52 form a water collecting space on the inner wall of the pool body 1, and the water collector 5 is provided
- a branch water collecting pipe 6 communicating with the outside of the pool body 1, the outlet of each branch water collecting pipe 6 is connected to the water outlet pipe 7 at the outer wall of the pool body 1.
- the filtered water passing through the sand filter bed 4 enters the sump 5 through the sieve slit of the sieve plate 51. As shown in Fig.
- the sieve plate 51 of the present embodiment has a shape of a curved plate, and the convexity of the sieve plate 51 faces the pool body.
- the arc-shaped sieve plate 51 is used for better collecting the filtered water filtered from the sand filter bed 4.
- the branch water collecting pipe 6 is connected to the water collector 5; the water outlet pipe 7 discharges the filtered water filtered through the sand filter bed 4 out of the cell body 1.
- the backwashing component comprises a backwashing pipe 8 and a draining pipe 9, a valve is arranged on the backwashing pipe 8, and is connected with the outlet pipe 7, and a valve is arranged on the sewage pipe 9 and connected to the bottoms of the four water distribution risers, and the backwash water is connected
- the backwashing pipe 8 enters the water collector 5, and the sewage pipe 9 discharges the sand washing sewage out of the horizontal sand filter.
- the aeration assembly is composed of an aeration tube 10 and a plurality of aeration devices 11 connected to the aeration tube 10. During the backwashing process of the sand filter, the compressed air is released into the sand filter in the form of small bubbles through the aeration assembly. In the pool; the aeration assembly is installed at the bottom of the tank body 1.
- a horizontal flow sand filter water treatment process includes the following two processes:
- the inlet pipe 2 is opened, the outlet pipe 7 is opened, the backwashing pipe 8 is closed, and the sewage pipe 9 is closed.
- the raw water enters the horizontal flow sand filter through the inlet pipe 2, and smoothly enters the sand filter bed 4 through the water distribution riser, and flows the filter sand from the inside to the outside in the horizontal direction of the pool body 1.
- large-sized suspended particles or contaminants in the water are intercepted by the inner sand grains, and small-sized pollutants are deposited between the outer sand grains, and the efficiency of the sand filtering is maximized by filtering from the inside to the outside.
- the filtered water is collected by the sump 5 uniformly distributed on the inner wall of the cell body 1, flows through the branch water collecting pipe 6, and is discharged to the outlet pipe 7 for discharge.
- the horizontal flow sand filter of the present invention can also realize the function of the biological filter.
- the biofilter is a method of biooxidizing raw water using aerobic microorganisms.
- Another horizontal flow biofilter water treatment process includes the following two processes:
- (1) Biological filtration process Under suitable culture conditions, a gelatinous biofilm is formed on the surface of the filter sand.
- the raw water enters the horizontal flow sand filter through the inlet pipe 2, and smoothly enters the sand filter bed 4 through the water distribution riser, and flows the filter sand from the inside to the outside in the horizontal direction of the pool body 1.
- the aeration assembly is opened, and the compressed air is released from the bottom to the bottom in the form of small bubbles through the aeration assembly, and the oxygen is sufficiently supplied.
- the raw water flows along the surface of the sand filter, the soluble, gelatinous and suspended substances in the raw water are adsorbed on the biofilm and decomposed by the microorganisms.
- the filtered water is collected through the sump 5 on the inner wall of the cell body 1, flows through the branch water collecting pipe 6, and is discharged to the outlet pipe 7 for discharge.
- a horizontal flow sand filter comprises a pool body 1, a raw water inlet component, a sand filter bed 4, a filtered water outlet component, a backwashing component and an aeration component, and the specific structure of the horizontal flow sand filter is the same as that of the embodiment 1.
- the pool body 1 is divided into four circular regions corresponding to four water distribution devices 3, and the circular regions are distributed in a rectangular shape, and a sand filter bed 4 and a water distribution device are arranged in a circular region. 3; the water inlet pipe 2 in the raw water inlet assembly is respectively connected with four water distribution devices 3; the water distribution device 3 is a cloth water riser, and the water distribution pipe can be surrounded by a slit screen. The bottoms of the four water distribution risers are connected to the drain pipes 9, respectively.
- the filtered water outlet assembly is composed of a sump 5 and an outlet pipe 7;
- the sieve plate 51 described in the sump 5 is a cylindrical slat sieve, and the sieve plate 51 is fixed to the inner wall of the pool body 1,
- the cover plate 52 is determined according to the projection configuration of the sieve plate 51 and the inner wall of the pool body 1 on the horizontal surface, the sieve plate 51 and the upper and lower cover plates together with the inner wall of the pool body 1 form a water collecting space, and the entire pool body 1 shares a water collecting space.
- the water collecting space may temporarily store filtered water;
- the water outlet pipe 7 is connected to the water collecting space.
- the water treatment process of the horizontal flow sand filter of this embodiment is the same as that of the first embodiment, except that:
- the filtered water enters the water collecting space formed by the water collector 5 and the inner wall of the pool body 1, and is uniformly discharged through the water outlet pipe 7.
- the above water collecting space can function as a temporary storage of filtered water.
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Abstract
Description
Claims (10)
- 一种水平流砂滤池,其特征在于:包括池体、原水进水组件、砂滤床、过滤水出水组件、曝气组件以及反冲洗组件,砂滤床设于池体内,由滤砂组成;原水进水组件包括进水管和将原水送入砂滤床内的布水装置,进水管与布水装置相连,布水装置设于砂滤床内,布水装置的立面上分布有多个出水孔道;过滤水出水组件,包括集水器和出水管,集水器与砂滤床邻接的一侧具有进水孔道,出水管与集水器连通;反冲洗组件包括反冲洗管和排污管,反冲洗管与出水管连接,排污管与所述布水装置相连。
- 根据权利要求1所述的水平流砂滤池,其特征在于:所述布水装置设置在砂滤床的轴线方向上,或是沿砂滤床外壁分布。
- 根据权利要求1或2所述的水平流砂滤池,其特征在于:所述集水器包括筛板和位于筛板上下两端的盖板,筛板和两个盖板在池体内形成集水空间。
- 根据权利要求2所述的水平流砂滤池,其特征在于:当所述布水装置沿砂滤床外壁分布时,所述集水器设置在砂滤床的轴线方向上。
- 根据权利要求1所述的水平流砂滤池,其特征在于:所述布水装置是用具有楔形丝过滤面的筛板围制而成,或是穿孔管、条缝筛中的一种,或是以上几种的组合;所述集水器是用具有楔形丝过滤面的筛板围制而成,或是穿孔管、条缝筛、微滤膜、超滤膜中的一种,或是以上几种的组合。
- 根据权利要求1所述的水平流砂滤池,其特征在于:所述布水装置的布局采用矩形、圆形、环形或线形,或是以上几种的组合。
- 根据权利要求5所述的水平流砂滤池,其特征在于:所述集水器中所述筛板为沿所述池体的内壁连续或间隔排布的弧片、梯台片、弯折片、平片或其他几何形式的片状结构,所述筛板的凸起朝向所述池体内;或,所述筛板为分布有布水孔的圆筒。
- 根据权利要求1所述的水平流砂滤池,其特征在于:所述集水器设 有至少一个与池体外部连通的分支集水管,各个分支集水管的出口在池体外与出水管相连。
- 一种水平流砂滤池的水处理工艺,其特征在于:该工艺包括下列两项过程;(1)过滤过程:原水经由进水管进入水平流砂滤池,通过布水装置的出水孔道均匀平缓地进入砂滤床,并沿池体水平方向从内向外或从外向内流过滤砂;过滤过程中,水中悬浮颗粒或污染物被砂粒逐渐拦截,径向过滤使滤砂的效能达到最大化;最终,过滤水通过集水器收集,汇至出水管排出;(2)反冲洗过程:冲洗水经由反冲洗管进入池体内并进入砂滤床;压缩空气通入曝气管,经池体底部的曝气装置以气泡的形式自下而上的进入砂滤床中,气相的搅动、水流的剪切力作用以及砂粒之间的碰撞摩擦,使杂质污染物从砂粒表面脱离,进入清洗水中;调整气相搅动程度,控制砂粒翻滚,通过清洗水的逆向清洗,不同区域内不同脏污程度的污砂分别得到清洗,不会混合;一段时间后,带有污染物的清洗水汇入布水装置中,经由排污管排出水平流砂滤池。
- 一种水平流砂滤池的水处理工艺,其特征在于:该工艺包括下列两项过程;(1)生物过滤过程:在适宜的培养条件下,滤砂表面生成一层凝胶状生物膜,原水经由进水管进入水平流砂滤池,通过布水装置的出水孔道均匀平缓地进入砂滤床,并沿池体水平方向从内向外或从外向内流过滤砂;曝气组件开启,压缩空气经曝气组件,以小气泡的形式自下而上的释放到砂滤池中,充分供给氧气;当原水沿滤砂表面流过时,原水中的可溶性、胶性和悬浮性物质吸附在生物膜上而被微生物分解;最终,过滤水通过集水器收集汇至出水管排出;(2)反冲洗过程:冲洗水经由反冲洗管池体内并进入砂滤床;压缩空气通入曝气管,经池体底部的曝气装置以气泡的形式自下而上的进入砂滤床中,气相的搅动、水流的剪切力作用以及砂粒之间的碰撞摩擦,使杂质污染物从砂粒表面脱离,进入清洗水中;调整气相搅动程度,控制砂粒翻滚,通过清洗水的逆向清洗,不同区域内不同脏污程度的污砂分别得到清 洗,不会混合;一段时间后,带有污染物的清洗水汇入布水装置中,经由排污管排出水平流砂滤池。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK17878216.5T DK3552679T3 (da) | 2016-12-06 | 2017-11-23 | Sandfilterbassin med horisontalgennemstrømning og vandbehandlingsfremgangsmåde deraf |
JP2019531247A JP6797303B2 (ja) | 2016-12-06 | 2017-11-23 | 水平流砂濾過プール及び水処理プロセス |
AU2017372226A AU2017372226B2 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration pool and water treatment process thereof |
PL17878216.5T PL3552679T3 (pl) | 2016-12-06 | 2017-11-23 | Zbiornik z filtrem piaskowym z przepływem poziomym i sposób uzdatniania wody |
US16/467,488 US11180395B2 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration pool and water treatment process thereof |
ES17878216T ES2955163T3 (es) | 2016-12-06 | 2017-11-23 | Cuenca de filtración de arena de flujo horizontal y procedimiento de tratamiento de agua de la misma |
FIEP17878216.5T FI3552679T3 (fi) | 2016-12-06 | 2017-11-23 | Vaakavirtaushiekkasuodatinallas ja sen vedenkäsittelyprosessi |
EP17878216.5A EP3552679B1 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration basin and water treatment process thereof |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621328393.X | 2016-12-06 | ||
CN201611109076.3 | 2016-12-06 | ||
CN201621328393.XU CN206553348U (zh) | 2016-12-06 | 2016-12-06 | 一种水平流砂滤池 |
CN201611109076.3A CN106731060A (zh) | 2016-12-06 | 2016-12-06 | 水平流砂滤池及其水处理工艺 |
Publications (1)
Publication Number | Publication Date |
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WO2018103537A1 true WO2018103537A1 (zh) | 2018-06-14 |
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AU (1) | AU2017372226B2 (zh) |
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CN117566905A (zh) * | 2023-10-18 | 2024-02-20 | 杭州亦韬环境工程有限公司 | 一种反硝化滤池过滤装置 |
DE202023106057U1 (de) | 2023-10-19 | 2023-12-01 | Passavant-Geiger Gmbh | Parallelfluss-Filterbecken zur Reinigung von Abwasser |
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ES2955163T3 (es) | 2023-11-29 |
AU2017372226B2 (en) | 2020-05-07 |
EP3552679A4 (en) | 2019-12-25 |
US20190330090A1 (en) | 2019-10-31 |
PL3552679T3 (pl) | 2024-01-22 |
EP3552679B1 (en) | 2023-06-07 |
JP2020500704A (ja) | 2020-01-16 |
DK3552679T3 (da) | 2023-09-18 |
FI3552679T3 (fi) | 2023-09-05 |
EP3552679A1 (en) | 2019-10-16 |
US11180395B2 (en) | 2021-11-23 |
AU2017372226A1 (en) | 2019-07-04 |
JP6797303B2 (ja) | 2020-12-09 |
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