WO2018132052A1 - Système de traitement pour eaux pluviales - Google Patents

Système de traitement pour eaux pluviales Download PDF

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Publication number
WO2018132052A1
WO2018132052A1 PCT/SE2018/000001 SE2018000001W WO2018132052A1 WO 2018132052 A1 WO2018132052 A1 WO 2018132052A1 SE 2018000001 W SE2018000001 W SE 2018000001W WO 2018132052 A1 WO2018132052 A1 WO 2018132052A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
filter
diameter
pipes
cassette
Prior art date
Application number
PCT/SE2018/000001
Other languages
English (en)
Inventor
Sam EKSTRAND
Original Assignee
Werec Water Ecosystem Recovery Ab
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
Application filed by Werec Water Ecosystem Recovery Ab filed Critical Werec Water Ecosystem Recovery Ab
Publication of WO2018132052A1 publication Critical patent/WO2018132052A1/fr

Links

Classifications

    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • B01D24/14—Downward filtration, the container having distribution or collection headers or pervious conduits
    • 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
    • B01D24/16—Upward filtration
    • B01D24/167—Upward filtration the container having distribution or collection headers or pervious conduits
    • 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
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • 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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
    • 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
    • E03F5/16—Devices for separating oil, water or grease from sewage in drains leading to the main sewer
    • 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 - WEREC treatment system for storm water- is developed to remove oil compounds, heavy metals and phosphorus from storm water. Oil compounds and some heavy metals are removed in a first filter step with biological filter material. Phosphorus and more heavy metals are removed in a second filter step with
  • WEREC Water Ecosystem Recovery AB (hereinafter WEREC) have conducted extensive field studies in collaboration with IVL Swedish Environmental Research Institute, showing that three different commercially available calcium-based filter materials have the ability to remove phosphorus transported with water in ditches and agricultural streams. With the low concentrations in agricultural streams, compared to domestic wastewater, and with the very dynamic flow regimes, with alternating low and high water flows and strongly varying phosphorus concentrations, however, special requirements are imposed on the technical solution. As a result of our research and development results investment funding for calcium-based filter beds can now be acquired from the Rural development programme of the Swedish l Board of Agriculture.
  • That filter bed solution can also be used for storm water treatment, but it is based on the bed being placed at a location where the filter material can be excavated with excavator when it needs to be replaced.
  • the present invention consists of a technical solution which means that the filter material does not need to be excavated but can be removed by suction and replaced by new material blown into the filter cassette. This is a major advantage in urban areas where recurring material replacement using excavation cannot be carried out.
  • the invention also means that in the first filter step, for removal of oil compounds, replacement of filter material needs to be carried out only every 10-15 years instead of providing constant material supply or with replacement 1-4 times a year as in the systems used operatively today.
  • the treatment system is capable of receiving storm water from urban areas of different sizes.
  • the size of the facility can be varied to suit the size of the catchment area and the water flow during flow peaks.
  • the water reaches the first step of the treatment system; a plastic and/or glass fiber cassette with size 2-10 m 3 containing a filter material based on bark shavings or peat absorbing oil compounds and some heavy metals.
  • the calcium-based filter is built into pipe/tube modules with dimensions of 1000-3000 mm diameter.
  • the size of the calcium-based filter is typically 3 m 3 to 300 m 3 but may be larger depending on the size of the catchment area and how much of the catchment area that consists of impervious surface.
  • the water path through the calcium-based filter is based on the same principle as in the Calcium-based filter beds for which the patent application was submitted by WEREC in January 2016 (patent application 1630004-8), with distribution pipes in a bottom layer from which the water rises upward through the calcium-based material into a collecting layer.
  • the technical solution for the present treatment system is completely different since the calcium-based filter is incorporated into pipe/tube modules with the associated necessary technical adjustments, and since it is part of a treatment system that also removes oil compounds and heavy metals. Sizing and dimensions of the present system are also different because flow variations are much larger in areas where impervious surface areas make up a larger portion of the land use than in agricultural areas.
  • the filter must therefore have the capacity to receive considerably larger flows without substantial reductions in the removal capacity.
  • the amount of filter material required per hectare catchment area is many times greater in urban areas.
  • Storm water treatment system including a biological filter step and a calcium- based filter in pipe/tube cassettes.
  • the intake (1 in drawing 1 ) of the treatment system shall take in water up to a maximum amount (liters per second) over which the water overflows and runs past the treatment plant in a parallel pipe. The water intake is therefore placed
  • the pipe has a dimension in the range of 1 10-400 mm.
  • the intake hole size is adjusted to the maximum intake flow, which may be 5-300 l/s.
  • a cylinder (2 in drawing 2) which is made of stainless steel or aluminum and perforated with tightly placed 5-10 mm holes, or optionally with grid/steel mesh with 5-10 mm holes.
  • This cylinder is a protection against debris, leaves and living organisms, and forms part of the invention in patent application 1630004-8 submitted by us in January 2016. Therefore, permission to use the cylinder in this system is required. It is noted that WEREC AB owns both that invention and the present.
  • water runs in a pipe with a diameter of 110-400 mm to the first filter step in the system, a cassette typically of plastic and / or glass fiber of size 2-10 m 3 (2 in drawing 1). If the catchment area is large, several parallel cassettes can be included in the system.
  • the water is led to a distribution pipe system consisting of parallel, perforated pipes with diameter 50-160 mm (3 in drawing 1 , 3 in drawing 2) attached to the cassette roof. From the distribution pipe system, the water is sprayed over the filter material, which is based on bark, for example bark shavings, or on peat.
  • the biological filter material removes oil compounds and to some extent heavy metals from the water.
  • the water flows down through the filter material layer 30-100 cm thick, after which it reaches the collecting layer consisting of a collection pipe system (4 in drawing 1 , 4 in drawing 2).
  • the collection pipe system consists of parallel, perforated pipes 50-160 mm in diameter, connected to the outlet pipe having a diameter of 110-400 mm.
  • the water flows to the second step of the treatment system; a calcium-based filter in one or more parallel coupled pipe cassettes (5 in drawing 1 , 5 in drawing 2) that removes phosphorus and heavy metals.
  • Each pipe cassette typically has a length in the range of 3-50 meters, and a diameter in the range of 800-3000 mm.
  • the number of pipe cassettes is typically 1-5 but may be larger.
  • the number and size of the pipe cassettes are adapted to the maximum flow the treatment system is designed to be able to receive, which in turn depends on the size of the catchment area and the percentage of impervious surface in the catchment area.
  • the water flows into the calcium-based filter step from the first step of the treatment system in pipes of diameter 1 10-400 mm.
  • the water is led to the bottom of the pipe cassette where the water is distributed to parallel, perforated distribution pipes (6 in drawing 1 , 6 in drawing 2) which are lying in a 20-30 cm layer of macadam and have a diameter of 50-160 mm, typically 1 10 mm. From the distribution pipes, the water is distributed evenly into the bottom of the bed. Above the macadam layer is the layer with the calcium-based material (7 in drawing 2), usually Filtralite-P but the calcium-based material may also consist of Hyttsand, Polonite or any other similar calcium-based filter material. As mentioned, the invention does not include the filter material itself, but only the technical solution. The water is pressed through the filter material layer which is typically but not always 60-120 cm deep.
  • the calcium filter material used has a grain size in the range of 0-8 mm.
  • the pressure drop that occurs when water is led through the material is the basis for the distance between the parallel distribution pipes in the bottom layer, which in the present solution for storm water is with 40-100 cm distance between the pipes.
  • the collection pipe system consisting of perforated pipes of diameter 50-160 mm, typically 110 mm (7 in drawing 1 , 8 in drawing 2) leading to an outlet pipe (8 in drawing 1 , 9 in drawing 2).
  • the water rises through the collecting layer, seeps into the perforated pipes and flows to the outlet pipe and further to the main pipe in the storm water system (9 in drawing 1).
  • the pipe cassettes are sealed with welded ends at both ends, with holes for the intake and outlet pipes (diameter 110-400 mm).
  • Each pipe cassette has depending on its length 1-8 manholes (10 in drawing 1 , 10 in drawing 2). Through the manholes, exhausted filter material is removed by suction and new filter material is blown into the cassette every 10-15 years.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Inorganic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

L'invention concerne une solution technique pour l'élimination des composés huileux, des métaux lourds et du phosphore hors des eaux pluviales. Les composés huileux et certains métaux lourds sont éliminés lors d'une première étape de filtration à l'aide d'un matériau filtrant biologique. Le phosphore et des métaux lourds supplémentaires sont éliminés lors d'une seconde étape de filtration à l'aide d'un matériau filtrant à base de calcium. La présente demande de brevet concerne la solution technique, mais pas les matériaux filtrants. Selon l'invention, le matériau filtrant présent dans le filtre à base de calcium n'a pas besoin d'être extrait, mais peut être éliminé par aspiration et remplacé par un nouveau matériau soufflé dans la cassette de filtre. Ceci constitue un avantage majeur dans les zones urbaines où le remplacement récurrent du matériau par extraction ne peut pas être effectué. Selon l'invention également, lors de la première étape de filtration, pour l'élimination des composés huileux, le remplacement du matériau doit être effectué uniquement tous les 10 à 15 ans contrairement à ce qui se passe avec les systèmes utilisés sur le terrain à l'heure actuelle qui demandent soit une alimentation constante en matériau soit un remplacement 1 à 4 fois par an. L'eau est amenée à travers le système sous l'effet de la gravité, sans alimentation externe en énergie.
PCT/SE2018/000001 2017-01-12 2018-01-02 Système de traitement pour eaux pluviales WO2018132052A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1730007-0 2017-01-12
SE1730007A SE540368C2 (sv) 2017-01-12 2017-01-12 Reningssystem för dagvatten

Publications (1)

Publication Number Publication Date
WO2018132052A1 true WO2018132052A1 (fr) 2018-07-19

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Family Applications (1)

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PCT/SE2018/000001 WO2018132052A1 (fr) 2017-01-12 2018-01-02 Système de traitement pour eaux pluviales

Country Status (2)

Country Link
SE (1) SE540368C2 (fr)
WO (1) WO2018132052A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110054368A (zh) * 2019-05-29 2019-07-26 宜昌朗天新型建材有限公司 一种基于陶粒生产的污水处理系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010140968A1 (fr) * 2009-06-05 2010-12-09 Kenrex Envirotech Utilisation d'une composition de conditionnement d'eaux usées, système, matériau et procédé de recyclage d'eaux usées
US20110309024A1 (en) * 2009-02-05 2011-12-22 Konstantinos Athanasiadis Water treatment
US20130032544A1 (en) * 2011-08-05 2013-02-07 University Of Vermont And State Agricultural College Systems and methods for reducing phosphorous in phosphorous-containing outflows
SE537680C2 (sv) * 2011-09-09 2015-09-29 Nordkalk Oy Ab Filtermaterial för reduktion av fosfor- och/eller tungmetallbelastning i ett vattendrag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110309024A1 (en) * 2009-02-05 2011-12-22 Konstantinos Athanasiadis Water treatment
WO2010140968A1 (fr) * 2009-06-05 2010-12-09 Kenrex Envirotech Utilisation d'une composition de conditionnement d'eaux usées, système, matériau et procédé de recyclage d'eaux usées
US20130032544A1 (en) * 2011-08-05 2013-02-07 University Of Vermont And State Agricultural College Systems and methods for reducing phosphorous in phosphorous-containing outflows
SE537680C2 (sv) * 2011-09-09 2015-09-29 Nordkalk Oy Ab Filtermaterial för reduktion av fosfor- och/eller tungmetallbelastning i ett vattendrag

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CARINA FARM: "Rening av dagvatten genom filtrering och sedimentation", VA-FORSK RAPPORT, vol. 16, March 2003 (2003-03-01), Svenskt, pages 19 - 20 , 23, XP055511407, ISBN: 91-89182-80-4 *
GUDRUN ALDHEIMER: "Reningsanläggning for dagvatten", SORBUS, RAPPORT 12 2006, December 2006 (2006-12-01), Stockholm, pages 12 - 16, XP055511403 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110054368A (zh) * 2019-05-29 2019-07-26 宜昌朗天新型建材有限公司 一种基于陶粒生产的污水处理系统

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SE540368C2 (sv) 2018-08-14
SE1730007A1 (sv) 2018-07-13

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