WO2006094422A1 - Procede et dispositif de purification des eaux de pluie - Google Patents

Procede et dispositif de purification des eaux de pluie Download PDF

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Publication number
WO2006094422A1
WO2006094422A1 PCT/CH2006/000139 CH2006000139W WO2006094422A1 WO 2006094422 A1 WO2006094422 A1 WO 2006094422A1 CH 2006000139 W CH2006000139 W CH 2006000139W WO 2006094422 A1 WO2006094422 A1 WO 2006094422A1
Authority
WO
WIPO (PCT)
Prior art keywords
cleaning
flow
rainwater
partial
volume
Prior art date
Application number
PCT/CH2006/000139
Other languages
German (de)
English (en)
Inventor
Giorgio Morandini
Martin Armbruster
Original Assignee
Oekag Wassertechnik (Schweiz) Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102005044166A external-priority patent/DE102005044166A1/de
Application filed by Oekag Wassertechnik (Schweiz) Ag filed Critical Oekag Wassertechnik (Schweiz) Ag
Priority to EP06705379A priority Critical patent/EP1855775A1/fr
Publication of WO2006094422A1 publication Critical patent/WO2006094422A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0024—Inlets or outlets provided with regulating devices, e.g. valves, flaps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/003—Sedimentation tanks provided with a plurality of compartments separated by a partition wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0042—Baffles or guide plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2433—Discharge mechanisms for floating particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
    • 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
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2221/00—Applications of separation devices
    • B01D2221/12—Separation devices for treating rain or storm water
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • 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
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001—Runoff or storm water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams
    • 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

Definitions

  • the invention relates to a method for cleaning rainwater, in particular street sewage, according to the preamble of patent claim 1 further relates to an apparatus for performing the method according to claim 1.
  • Cleaning volumes are then limited in their performance, when they are exposed to a combination of high hydraulic load and at the same time high pollution load.
  • There are various methods of increased cleaning performance z. B. filtration method of different power classes or z. B. also coalescing.
  • a method compared to pure gravitational separation in principle free flow increased cleaning power but also results already by a gravitational separation with heavy throttling the process, since in this case dirt trays more time for sedimentation resp. Flotation is given. If you now separate the flushing surge, which regularly has the unfavorable combination of high hydraulic load and high contaminant load, you can perform this under heavily throttled drain cleaning, which is more powerful than pure gravitative separation processes in the free flow.
  • a strong hydraulic separation is therefore synonymous with the fact that the rinse can be directed into at least its own volume, which is essentially no volume exchange with the subsequent volume flow after its filling, so at least not the majority of the following volume flow into this volume and flow displace the rinsing volume or can release already trapped volume and trapped particles.
  • Still other methods want to make use of the state of the flushing surge, but do not separate the partial flows at all, but lead you in time through several treatment volumes. At least the first treatment volume should make up the flushing swelling treatment, followed by further treatment volumes which, in theory, are responsible for the cleaning of the then less loaded volume flow. At high hydraulic loads, however, the cleaning processes in the volumes flowing through in the following can nevertheless be exposed to considerable contaminant loads, which then no longer exist in the previous tanks can be restrained. These method approaches also lack the strong hydraulic separation of the first flush with high pollution load from the subsequent flow with less Schmutzfrächt.
  • EP 1 108 455 Al takes advantage of the facts of the rinsing surge, stores the temporally first partial flow of the soiled rinsing surge and allows the temporally following partial flow to pass. Since the later part stream is not subjected to purification, this method and associated technique then ' significant drawbacks when z. B. unfavorable topologies or long-lasting rain events low intensity ensure that even later in time incurred partial flows transport pollution. This pollution is passed through this technology in the sequence untreated into nature. A measure for the strong hydraulic separation of trapped volume and subsequent flow is not given in this technique.
  • This technique is based on a method which is a combination of the above-mentioned methods, all of which have disadvantages.
  • Other known techniques such as: As the rainwater retention basin, share volume flows not according to temporal criteria of the outflow, but according to its intensity. If the intensity of the first flushing surge is less than the design intensity for the operating case of such restraint technology, the flushing surge is not retained in this technique and, together with its high contaminant load, completely flows past the retention volume. And even if the first partial flow is generated with high intensity, at most the part is retained which exceeds the design intensity. Very often, the process of gravitational separation, ie separation of heavy matter by sedimentation and separation of light matter by abrasion, is used for the treatment of road wastewater.
  • Piltration method but not only the hydraulic load as a limiting factor; In addition, they are still and in particular very sensitive to high pollutant load per time. In addition, filters are barriers and form a barrier that can not be flushed. The combination of high hydraulic loads with simultaneously high pollution load, which is present at the arrival of the rinse surge at the cleaning, can be treated only with considerable effort. If processes of higher cleaning power are used, they must therefore often be coupled with expensive pretreatment processes in order to achieve the Reduce contamination before the actual cleaning process.
  • the present invention is based on the object to overcome the various disadvantages of prior art and to allow a simplified way the treatment of the entire rainwater seizure with a more efficient and safe compared to gravitational separation process. This object is achieved by a method according to the features of patent claim 1.
  • the temporal rinsing surge subsequent partial flow is thus supplied in time before the rinsing surge of further purification, treated both streams with a more powerful method than the gravitational separation and finally the rinsing can be treated greatly throttled time after him in the supply still temporally following partial flow.
  • the treatment of flushing may also already during the onset seizure of the following
  • the temporal sequence of the treatment of rinsing surge with high pollution load and possibly high volumetric flow rate and subsequent flow, possibly also with high volumetric flow, but with significantly reduced pollution load, exchanged the two streams do not mix substantially and thus each can be fed separately to a treatment which is superior to the gravitational separation. Since the treatment of the SpülSchwallvolumens can be done very strong throttled after draining any rain donations high hydraulic intensity with this method, the highly limiting case of simultaneous loading of the treatment process with high hydraulic load and high pollution load burden can be easily avoided. Only in the event that the treatment facilities laid out in accordance with the design were hydraulically overloaded in the case of an exceptional rain event, must a part of the after-flow, slightly soiled one have to be relieved
  • Separating device is arranged as a chamber with at least one inlet and at least two processes. If the drains of the separation chamber are arranged at a sufficient distance one above the other, at first only the lower drain is flowed through, the upper drain remains initially dry. The lower drain opens into a drain pipe and this in the catchment volume for the time flowing earlier partial flow. First, the drainpipe is filled partially filled and stored the entire rinse in the collection volume. With increasing filling of the collecting volume, water in the drainage tube will back up. Achieve this Backflow the separator and the water level in it rises above the Sohlenkote the upper drain, the phase of catching the rinse is completed. This is now, only by the fully filled tube with high flow resistance connected to the separator, hydraulically strongly decoupled in its catchment volume.
  • the temporally following partial flow with significantly lower contaminant load then flows through the upper outlet from the separator out before the caching rinse surge treatment, which can be charged due to the smaller pollution load with a much higher hydraulic load. Only when the rainfall is finished, the catchment volume emptied at significantly throttled drain via the same cleaning device or an additional cleaning device.
  • a particularly advantageous solution results when the purification of the first partial flow is combined with high purification performance, for example with coalescence technology and / or adsorption technology and / or with materials which can absorb light substances and, if appropriate, biodegrade by means of suitable microorganisms.
  • Lightweight materials can be retained with suitable separation devices, eg immersion walls.
  • suitable separation devices eg immersion walls.
  • Existing devices for collecting rainwater waste or existing gravity separation basins can be retrofitted with components advantageous to the solve the task according to the invention. Savable space can be used for further cleaning devices. It is advantageous to provide a collecting container for incidents in dry weather.
  • the catch basin can be designed as a sealed ground basin.
  • the invention is independent of the form in which necessary structures are implemented, so whether round, polygonal or in any other form and in what execution, whether z. B. with collection volumes in steel, concrete, earth or any other construction.
  • the invention is further independent of whether necessary structures are carried out with one or more contiguous or separate collection volumes or cleaning devices.
  • the invention is independent of whether the separation of the volumetric flows is carried out directly in front of the place or places where the cleaning process is carried out, or decentralized at one or more places at some distance.
  • the invention is independent of whether the associated technique is realized with rigid components or whether individual parts are movable and / or flexible and / or whether individual components are at least temporarily partially or completely disassembled. The invention will be described in more detail with reference to FIGS. 1 to 17. Fig.
  • FIG. 1 shows a possible embodiment of the invention in cross section and Fig. Ia is a plan view
  • Fig. 2 shows the time sequence of the cleaning process.
  • the device (Fig.l) is divided by three concentric annular walls 1, 2 and 3 into the chambers A, B and C.
  • the rain waste water in the chamber A flows to the device.
  • Via two nozzle-shaped slots 5a and 5b first of all the flushing surge arrives from chamber A into chamber B (ti in FIG. 2).
  • the water level 11 in chamber A is slightly higher than the water level 12 in chamber B (ti, Fig. 2).
  • chamber B is the cleaning device 6 for the rinsing surge, which drains over the very much throttled drain line 7.
  • the nozzle-shaped slots 5a and 5b have in the direction of flow from chamber A to chamber B a much higher flow resistance than in the opposite direction, the rinsing surge is thus trapped in chamber B and hydraulically very strongly separated from the subsequent partial flow to the chamber A. Rinsing the Spülschwoll from chamber B in chamber C is the subsequent partial flow is not possible.
  • the throttling of the drain 7 may be set so that the evacuation of chamber B will last many hours to several days.
  • Chamber C empties unthrottled via cleaning device 8 and line 9, so that in the inventive cleaning process, the time sequence of the partial volume flows in the process is reversed.
  • Chamber C flows through during the rain event from the time later inflowing sub-volume flow, falls after the rainfall event dry (t 3 in Fig. 2), while chamber B only begins to empty.
  • a buoyant device 10 which can absorb and bind lightweight materials and may also be provided with microorganisms for biodegradation of light materials (Fig.l) ..
  • Fig. 3 shows the same device as Fig. 1, here exemplified in a rectangular design.
  • Fig. 4 shows the floor plan of an alternative
  • Distribution chamber A This has an inlet 4 and two processes 14 and 15.
  • This distribution chamber A is to be arranged at high altitude on a cleaning device.
  • the rinsing surge flows to the distribution chamber and undisturbed again via the lower drain 14 through a partially filled pipe from here (time ti) and a chamber B.
  • time ti time ti
  • a chamber B a partially filled pipe from here
  • time ti time ti
  • the water level 11 in the distribution chamber A rises (time t 2 ) on the top Kote of the lower sequence, the drain line downstream flow 14 is full.
  • Fig. 5 shows in cross-section and Fig. 5a in plan view the conversion of a basin with prior use with a method of pure gravitational separation.
  • the chamber for the rinsing surge is exemplified in this basin divided into two chambers B and B2, which each have their own cleaning device 6, for example.
  • the hydraulic separation takes place here by way of example mechanically by means of float-controlled flaps 17a and 17b.
  • By compared to gravitational separation significantly higher cleaning capacity per volume released space in chamber D is used for further purification stages, such.
  • material that can absorb and bind lightweight materials and may also be provided with microorganisms for biological degradation of light materials for example, for a Koaleszenzabscheider 20 and a floatable device 10.
  • Fig. 6 shows in cross-section and Fig 6a in plan view another embodiment of a pelvic equipment.
  • the pool is exemplary divided into three chambers (A, B, C).
  • the two chambers B and C each have their own cleaning device.
  • Chamber A is the distribution chamber.
  • the hydraulic separation takes place here for example by means of nozzle-shaped opening 5 in the partition 18a with inlet to the chamber B.
  • the further inflowing water overflows the partition wall 18b via an overfill edge 23b in the chamber C.
  • the dry cleaning device 6b is overflowed and thus permanently purged.
  • the filling of the chamber B with the first sewage surge occurs at the time t 2 on the raid edge 23a.
  • the filter 6a is also permanently overflowed and thus rinsed free.
  • the sludge accumulates in the sludge chamber 22.
  • the sludge can be withdrawn as needed or continuously with pumps. Via the lines 26 all compartments can be emptied.
  • the baffle walls 24a, 24b prevent the return of lightweight materials on the filter 6a and the chambers A and C.
  • the cleaning device 6 is exemplified. It can also be made in a different shape, for example as a free-standing device in the chamber B, C, as shown in Fig. 5.
  • the filters may be box-shaped, plate-like or formed in a freely selected shape. Instead of the freestanding construction, integration on or in the side walls is possible. In lack of space, the Filter devices in the side of the pelvis arranged shafts, which are connected with lines to be accommodated.
  • Fig. 7 shows the system structure in a further embodiment variant with several basins Bl, B2, B3. It can be created either several basins B or more basins C.
  • B stands for sinks for rinsing;
  • C refers to basins for the temporal following partial flow.
  • the illustrated pool C is, for example, an existing rectangular pool that is being reused.
  • Fig. 8 shows a further, the cleaning performance for lightweight materials improving device with a pre-throttle flow 7 mounted diving bell. Due to the described strong throttling and / or delayed emptying lightweight materials will rise to the surface. The restricted volume flow can not pull the lightweight materials down under the surface of the water like an immersion wall separating from the drain pipe, even if they pass through the filter. For massive oil entry, as occurs in accidents, the throttle sequence 7 can be additionally provided with a standard self-closing valve (not shown).
  • Fig. 9 shows a further embodiment of a distribution chamber A. This has a device 28 which is connected downstream of the inlet .4. The chamber 28 may be at rapid inflowing volume flows are used in feed 4.
  • FIG. 10 shows the temporal aspect of the process sequence in the case of a rain event as a graph.
  • the rain event is displayed as a curve.
  • Axis Q denotes the amount of water
  • axis t the time component.
  • S is the rinsing surge in ti
  • T is the subsequent partial volumetric flow in t2.
  • Fig. 11 illustrates the temporal shift of the rainwater treatment.
  • the rinse is collected and delayed the cleaning supplied.
  • the rinsing surge S: ti and the partial volume flow B: t 2 is filtered via the strong restriction Qi only after the time interval ti.
  • U is the name for the speed.
  • FIG. 12 explains a further variant of the time shift.
  • the rinse A is collected and immediately throttled Qi supplied to the cleaning.
  • This variant also shows a temporal reversal, since due to the strong restriction Qi, a large part of the purge surge (S) accumulating first in time leaves the treatment stage after the expiration of the subsequent partial volume flow (T). For particularly long rain events, it may happen that the partial volume flow outflow (T) exceeds the duration of the flushing flush treatment (S).
  • S purge surge
  • Fig. 13 shows the volume flow-based deposition technique realized in many techniques. This hydraulic type of separation above the water level can not detect smaller hydraulically not pronounced rinsing volume flow rates ⁇ Qi.
  • FIGS. 15, 16, 17 the process sequence of a precipitation event is shown in a different way in three time steps ti, t 2 , t 3 .
  • A is the distribution chamber; S the rinsing surge and C the partial volume flow.
  • Floatable device with materials which can absorb light materials and possibly enriched with microorganisms, e.g. pads; roll

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Procédé de purification des eaux de pluie, en particulier des eaux de pluie tombées sur une chaussée, selon lequel le débit volumétrique des eaux de pluie est divisé dans le temps, en cas de pluies suffisamment fortes, en un premier débit partiel s'écoulant d'abord et en un second débit partiel subséquent, la partie prédominante du premier débit partiel des eaux de pluie étant acheminée dans au moins un réservoir collecteur fortement découplé hydrauliquement de la traversée du débit partiel suivant, les deux débits partiels sont acheminés vers un dispositif de purification et au moins le débit partiel collecté est séparé des impuretés par un procédé de purification qui est plus efficace qu'une simple séparation par gravitation.
PCT/CH2006/000139 2005-03-05 2006-03-03 Procede et dispositif de purification des eaux de pluie WO2006094422A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06705379A EP1855775A1 (fr) 2005-03-05 2006-03-03 Procede et dispositif de purification des eaux de pluie

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102005011353.2 2005-03-05
DE102005011353 2005-03-05
DE102005044166A DE102005044166A1 (de) 2005-03-05 2005-09-15 Verfahren und Vorrichtung zum Reinigen von Regenabwasser
DE102005044166.1 2005-09-15
CH355/06 2006-03-03
CH3552006 2006-03-03

Publications (1)

Publication Number Publication Date
WO2006094422A1 true WO2006094422A1 (fr) 2006-09-14

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Application Number Title Priority Date Filing Date
PCT/CH2006/000139 WO2006094422A1 (fr) 2005-03-05 2006-03-03 Procede et dispositif de purification des eaux de pluie

Country Status (2)

Country Link
EP (1) EP1855775A1 (fr)
WO (1) WO2006094422A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886410A (zh) * 2010-07-05 2010-11-17 北京科技大学 一种初期雨水弃流装置
CN101886408A (zh) * 2010-06-25 2010-11-17 同济大学 卧式初期雨水弃流装置
CN102102392A (zh) * 2010-12-24 2011-06-22 重庆大学 一体化初期雨水弃流井及雨水弃流的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924357A2 (fr) * 1997-12-22 1999-06-23 VSB VOGELSBERGER Umwelttechnischer Anlagenbau GmbH Structure de déversement pour eaux pluviales
EP1108455A1 (fr) * 1999-11-30 2001-06-20 Oekag Wassertechnik (Schweiz) AG Dispositif pour la separation d'eau de lavage et d'eau de pluie pour l'obtention d'eau de récupération prénettoyé
US20040108278A1 (en) * 2000-12-04 2004-06-10 Takachiho Corp. System and method for utilizing rainwater collected at buildings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924357A2 (fr) * 1997-12-22 1999-06-23 VSB VOGELSBERGER Umwelttechnischer Anlagenbau GmbH Structure de déversement pour eaux pluviales
EP1108455A1 (fr) * 1999-11-30 2001-06-20 Oekag Wassertechnik (Schweiz) AG Dispositif pour la separation d'eau de lavage et d'eau de pluie pour l'obtention d'eau de récupération prénettoyé
US20040108278A1 (en) * 2000-12-04 2004-06-10 Takachiho Corp. System and method for utilizing rainwater collected at buildings

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886408A (zh) * 2010-06-25 2010-11-17 同济大学 卧式初期雨水弃流装置
CN101886408B (zh) * 2010-06-25 2012-05-23 同济大学 卧式初期雨水弃流装置
CN101886410A (zh) * 2010-07-05 2010-11-17 北京科技大学 一种初期雨水弃流装置
CN102102392A (zh) * 2010-12-24 2011-06-22 重庆大学 一体化初期雨水弃流井及雨水弃流的方法

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