WO1997003254A1 - Systeme domestique de traitement de l'eau - Google Patents

Systeme domestique de traitement de l'eau Download PDF

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Publication number
WO1997003254A1
WO1997003254A1 PCT/GB1996/001637 GB9601637W WO9703254A1 WO 1997003254 A1 WO1997003254 A1 WO 1997003254A1 GB 9601637 W GB9601637 W GB 9601637W WO 9703254 A1 WO9703254 A1 WO 9703254A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
tank
reject
membrane
units
Prior art date
Application number
PCT/GB1996/001637
Other languages
English (en)
Inventor
Edwin William John Murrer
Original Assignee
Anglian Water Services Ltd.
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 Anglian Water Services Ltd. filed Critical Anglian Water Services Ltd.
Priority to AU63659/96A priority Critical patent/AU6365996A/en
Priority to GB9705128A priority patent/GB2308403B/en
Publication of WO1997003254A1 publication Critical patent/WO1997003254A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/074—Arrangement of water treatment devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/08—Apparatus therefor
    • B01D61/081—Apparatus therefor used at home, e.g. kitchen
    • 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
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B1/00—Methods or layout of installations for water supply
    • E03B1/04—Methods or layout of installations for water supply for domestic or like local supply
    • 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
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • 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
    • C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
    • 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
    • C02F2103/005—Black water originating from toilets
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]

Definitions

  • This invention relates to a domestic water treatment system. It relates in particular to a system adapted to maximise the use of softened water, and to minimise water wastage.
  • the most common form of domestic water softener is an ion-exchange system, in which the hardness is removed by deposition onto special resin beads. At frequent intervals, the resin beads need to be cleaned; a salt solution is used to regenerate the resin by removing the hardness which then forms part of a salt/hardness waste stream. The waste stream is discharged to the sewer.
  • This type of softening device will produce water of variable hardness, depending upon the condition of the resin beads. Typically, this type of water softener treats all the water on its way to the storage tank in the loft, and of this total volume about 35% will be used for flushing toilets. Membranes are very effective at softening water.
  • EP-A-0393308 describes apparatus for washing vehicles, using a membrane separator through which water is pumped and divided into two streams, a clean water stream and a reject water stream. The streams pass to respective storage tanks, from which water is taken as desired, the reject water for washing vehicles and the clean water for rinsing them. The level of reject water is controlled and, if it falls, the clean water is used to supplement the reject water. Part of the reject stream is recirculated to the inlet of the membrane separator, via the pump.
  • WPI Abstract Accession No. 75-65172W/39 (SU-A-0454180) discloses splitting the output from a cation-exchange membrane separator. One output is used to feed boilers, and the other to maintain water levels. The outputs may also be mixed.
  • membranes particularly those that have been recently developed for use under low pressures, can increase the output from a small membrane softening unit.
  • the re ⁇ use of the reject stream for toilet flushing ensures that no water is lost, and that toilets are not flushed with expensive softened water.
  • the system comprises: a water softener including a membrane, and first and second outlets for softened water and reject water, respectively; first and second storage tanks for softened water and reject water, respectively, the second tank being in connection with toilets, and the first tank being in connection with other units.
  • Figs. IA and IB are each highly schematic views of units that, in combination, constitute a preferred embodiment of a domestic water system according to this invention. Description of the Invention
  • the system to which this invention relates incorporates a domestic membrane water softener as part of an installation which enables the re-use of the reject stream for toilet flushing.
  • an embodiment of this invention utilises a unit that comprises a small pump, a carbon filter and the membrane which is installed in a small pressure tube.
  • the membrane unit may be controlled by a small panel which is programmable to operate mainly at night using cheap rate electricity, with top-ups during the day as required.
  • An automatic by-pass conduit may be provided, with a valve programmed to valve open when the unit is out of action. This ensures that at least the reject water storage tank is supplied with sufficient, mains water.
  • the softened water stream from the membrane is piped to a storage tank in the loft.
  • this water is used to supply domestic units, e.g. handbasins and/or baths, under gravity.
  • a conventional valve may be provided, to controJ the maximum level of water in this tank.
  • the reject stream from the membrane is piped to a second storage tank in the loft.
  • Thi ⁇ is used as the supply to the toilet cisterns.
  • the reject water storage tank is connected to the mains feed via a low level ball valve, to ensure a supply at times when the membrane unit switched off. In case the level rises, an overflow is provided.
  • the reject stream typically constitutes about 40%, e.g. within the range of 30-50%, of the input, and that this is comparable to the amount of water conventionally used for flushing toilets.
  • the amount of water lost via the overflow is therefore low.
  • a system of the invention is well adapted to maximum usage of water, on the one hand of "clean water” that users of units such as baths and/or handbasins can suddenly allow to come into contact with the body, and on the other hand of "grey” water which cannot be used for the same purpose but which can usefully be used in a domestic environment. This is distinct from any possible reuse of grey water from, say, handbasins.
  • Fig. IA shows an inlet 1 from a mains water supply (not shown) , a membrane softening unit indicated generally at 2, and outlets 3,4 for softened water and reject water, respectively.
  • a conduit 5 including an automatic by-pass valve 6 provides an alternative route for water from the inlet 1 to the outlet 3.
  • the unit 2 comprises, in line, a pump 7, a carbon filter 8, a membrane in a pressure tube 9, and a non-return valve 10 on the softened water outlet.
  • an internal by-pass conduit 11 includes a blend control valve 12. This valve and the pump, and also the valve 6, are controlled, and the control is supplied with power, by means (not shown) ; a control panel 13 is provided.
  • the unit is programmable to run when required, e.g. using cheap-rate electricity.
  • the valve 6 is opened, so that mains water passes directly to the outlet 3.
  • Fig. IB shows storage tanks 14 and 15, provided in a domestic loft, respectively for softened water and reject water, supplied by inlets 16 and 17 corresponding to the softening unit's outlets 3 and 4.
  • the storage tank 14 has a conventional ball valve 18, and an outlet 19 leading to, say, baths and handbasins; a handbasin 20 is shown.
  • the reject water storage tank 15 is supplied additionally by a mains water inlet 21.
  • a conventional low level ball valve 22 ensures that the water level does not fall below a minimum.
  • An outlet 23 leads to toilets, one of which is shown at 24. There is also an overflow 25, leading directly to the sewer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Sanitary Device For Flush Toilet (AREA)

Abstract

Système domestique de traitement de l'eau comprenant des unités, notamment des toilettes, alimentées sous l'effet de la gravité par un réservoir de stockage, un adoucisseur d'eau (2) comportant une membrane (9), ainsi qu'une première et une deuxième sorties (3, 4) respectives de l'eau adoucie et de l'eau rejetée, ainsi que des premier et deuxième réservoirs de stockage (14, 15) respectifs de l'eau adoucie et de l'eau rejetée, le deuxième réservoir (15) étant relié aux toilettes (24) et le premier réservoir (14) étant relié à d'autres unités (20). L'invention se base notamment sur la similitude entre la proportion d'eau rejetée par un adoucisseur à membrane et la proportion d'eau domestique utilisée comme chasse d'eau. Ceci permet de limiter au maximum le gaspillage de consommation d'eau.
PCT/GB1996/001637 1995-07-13 1996-07-08 Systeme domestique de traitement de l'eau WO1997003254A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU63659/96A AU6365996A (en) 1995-07-13 1996-07-08 Domestic water treatment system
GB9705128A GB2308403B (en) 1995-07-13 1996-07-08 Domestic water treatment system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9514281.6A GB9514281D0 (en) 1995-07-13 1995-07-13 Domestic water treatment system
GB9514281.6 1995-07-13

Publications (1)

Publication Number Publication Date
WO1997003254A1 true WO1997003254A1 (fr) 1997-01-30

Family

ID=10777559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/001637 WO1997003254A1 (fr) 1995-07-13 1996-07-08 Systeme domestique de traitement de l'eau

Country Status (3)

Country Link
AU (1) AU6365996A (fr)
GB (2) GB9514281D0 (fr)
WO (1) WO1997003254A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012085313A1 (fr) * 2010-12-22 2012-06-28 Blb Depuradoras, S.L. Système de traitement de l'eau

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738231A1 (de) * 1987-11-11 1989-05-24 Blanco Gmbh & Co Kg Wasseraufbereitungsanlage
EP0393308A1 (fr) * 1989-04-19 1990-10-24 Sogico S.A. Procédé de lavage d'un véhicule et installation pour la mise en oeuvre du procédé
DE4007351A1 (de) * 1989-02-15 1991-01-10 Broeker Ernst H Haus-anlage fuer permeat-reinwasser - frei von hemmstoffen- fuer die ganzheitstherapie zum trinken - atmen und fuer ueberwaermungs-dauer-duschbaeder im umlaufsystem, mit recyling in der brauchwasser-haus-versorgung
EP0616976A1 (fr) * 1993-03-23 1994-09-28 Grünbeck Wasseraufbereitung GmbH Appareil d'adoucissement de l'eau
DE4335669A1 (de) * 1993-10-20 1995-04-27 Bwt Wassertechnik Gmbh Anordnung und Verfahren zur Wasseraufbereitung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738231A1 (de) * 1987-11-11 1989-05-24 Blanco Gmbh & Co Kg Wasseraufbereitungsanlage
DE4007351A1 (de) * 1989-02-15 1991-01-10 Broeker Ernst H Haus-anlage fuer permeat-reinwasser - frei von hemmstoffen- fuer die ganzheitstherapie zum trinken - atmen und fuer ueberwaermungs-dauer-duschbaeder im umlaufsystem, mit recyling in der brauchwasser-haus-versorgung
EP0393308A1 (fr) * 1989-04-19 1990-10-24 Sogico S.A. Procédé de lavage d'un véhicule et installation pour la mise en oeuvre du procédé
EP0616976A1 (fr) * 1993-03-23 1994-09-28 Grünbeck Wasseraufbereitung GmbH Appareil d'adoucissement de l'eau
DE4335669A1 (de) * 1993-10-20 1995-04-27 Bwt Wassertechnik Gmbh Anordnung und Verfahren zur Wasseraufbereitung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012085313A1 (fr) * 2010-12-22 2012-06-28 Blb Depuradoras, S.L. Système de traitement de l'eau
ES2394718A1 (es) * 2010-12-22 2013-02-05 Blb Depuradoras, S.L. Sistema de tratamiento de agua.

Also Published As

Publication number Publication date
AU6365996A (en) 1997-02-10
GB2308403A (en) 1997-06-25
GB9705128D0 (en) 1997-04-30
GB9514281D0 (en) 1995-09-27
GB2308403B (en) 1999-05-19

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