GB2281582A

GB2281582A - A domestic waste water recovery system

Info

Publication number: GB2281582A
Application number: GB9318191A
Authority: GB
Inventors: John Peter Hernon
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-02
Filing date: 1993-09-02
Publication date: 1995-03-08
Also published as: GB9318191D0

Abstract

A domestic waste water recovery system utilizes a porous membrane filter to supply clarified water for domestic sanitation and general purpose use. The clarified water is contained in a suitable storage tank at or below ground level and clean water returned to a dwelling via a header tank at roof level to provide gravity feed to sanitation devices.

Description

Domestic Grey Water Recovery System This invention relates to a system for recovering domestic grev water for re-use prior to returning for sewage disposal.

As approximately 95% of all water received in domestic dwellings is returned for sewage disposal after one pass through the non sanitary appliances in the modern home this invention is aimed at conservation of that grey water for re-use. This recovered water will eventual ly be returned to the sewerage system bt benefiting the consumer by reducing the cost of water purchased throuah conservative use of the local water authority supply.

Grey water includes, domestic bath, shower and sink usage as well as washing machine. This supply is further supplemented by the addition of rain water.

According to the present invention there is provided a suitable storage tank , at or below ground level. It is intended that this tank be fed by gravity from the aforementioned sources. This supply is filtered before being stored using the porous membrane filter. An electrical pressure control led pump is used to return water from the storage tank to the dwelling for sanitary and general usage. A header tank and suitable piping is envisaged for this system to operate by gravity superseding existing supply to sanitation units.The header tank is intended to be located in the attic or loft.

A specific embodiment of the invention will now be described by way of example with reference to the accompan@ing drawings in which: Figure 1 Shows a suitable storage tank optimum capacity 20001ts.

located above or below ground.

Figure 2 Shows a porous membrane filter , intended to be user serviceable.

Fioure Shows a root mounted header tank.

Figure 4 Depicts a general schematic for a two storied dwelling.

Referring to the schematic Fig 4, water is fed by gravity to the ground level storace tank 32, passing through the porous membrane filter 31, in the process. Referring to Fig 1 the storage tank 1, tras an inlet from the filter 2 an atmospheric vent :; a manhole access 4. an nverf low to sewerage disposal at with a water trap "s bend 9, a ball cock 10,.Water is returned to the dwelling @ia foot valve 6, and screen at 8, which are located on the inlet side of electrical pressure pump 5, eitted with an accumulator 7 in order to convert the supply of grey water to a clarified 1 iquid al 3 sources of supply pass through the porous membrane filter ii, in Fig 2, This features supply pipes at 13, overflow to ground drainage at 12, attached to the upper overflow reservoir 20,.The three separate filtration mediums, pea gravel 14, coarse sand 15, and charcoal 16, are separated by porous diaphraams 2t and encapsulated with a removable cover 22. balow which is located a flow control screen for debris removal 17, mounting points are provided at 18 and a removable bottom chamber 19, facilitates periodic servicing of the filter medium FIG 3, Shows a header tank 23, for retaining a sufficient volume of returned water to facilitate use for sanitation and general use. Fitted with a ball cock deliverv valve 27, inblet from pump 26, overflow pipe 24, and fitted with a removable cover 25, also drain plug 28,

FIG 4 illustrates by schematic diagram how the separate components, i.e.Ground storage tank 1, pressure pump 5, filter 31, grey water pipes 13, header tank 27, toilets 32, 30, and general purpose tap 1, for a two storied dwelling.

Standard household single phase electrical supply ensures that the pump maintains a 3. 5 bar pressure with damping and surge control via attached accumulator. Control of water replenishment to the storage tank and header tanks is achieved by means of standard ball cock delivery valves 10, and 27, Ball cock 10, in the storage tank is connected to the street man supply t ensure maintenance of a minimum volume of water in the storage tank. This is achieved by altering thE position of the stand pipe of the ball cock valve.

Claims

Claims

1. A domestic grey water recoverv system comprising of a storage tank to hold recovered water which has been suitably filtered to clarifv it for domestic sanitation and general use. This is accomplished by re-supplying the recovered water to a header tank in the dwelling employing the medium of an electrically operated pressure pump.

2. A domestic grey water recovery system as claimed in claim 1.

wherein filtration of the grey water which has been supplied trom bath shower, hand basin and washing machine is passed through a porous membrane filter A domestic grey water recovery system as claimed in claim where the filter comprises of three different mediums. i.e. pea gravel, coarse sand, and chyarcoal 4.A domestic grey water recovery system as claimed in claim where the recovered filtered water is held in a storage tank, at ground level or below ground level With a minimum level bali cock valve connecting the storage tank to street mains supply.

5. h domestic grey water recovery system as claimed in claim 4.

whereby the clarified water recovered water is returned to the' dwelling via an electrically operated pressure compensated pump.

6. A domestic grey water recoverv system as claimed in claim 5.

where the returned water is held in a header tank in the dwelling for gravity feed purposes for domestic sanitation and general usage.

7. A domestic grey water recoverv system as claimed in claim 6.

where the components outlined are connected by suitable joints and piping.