WO2005003040A1 - Systeme d'epuration - Google Patents

Systeme d'epuration Download PDF

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Publication number
WO2005003040A1
WO2005003040A1 PCT/EP2004/005802 EP2004005802W WO2005003040A1 WO 2005003040 A1 WO2005003040 A1 WO 2005003040A1 EP 2004005802 W EP2004005802 W EP 2004005802W WO 2005003040 A1 WO2005003040 A1 WO 2005003040A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
floe
chamber
treatment
discharge
Prior art date
Application number
PCT/EP2004/005802
Other languages
English (en)
Inventor
Manoj Vilas Dagaonkar
Samiran Mahapatra
Sukdeb Pal
Original Assignee
Unilever Plc
Unilever Nv
Hindustan Lever Limited
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 Unilever Plc, Unilever Nv, Hindustan Lever Limited filed Critical Unilever Plc
Publication of WO2005003040A1 publication Critical patent/WO2005003040A1/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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5227—Processes for facilitating the dissolution of solid flocculants in water
    • 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
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • 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
    • B01D21/2405—Feed mechanisms for settling tanks
    • 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
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2444—Discharge mechanisms for the classified 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
    • B01D21/245—Discharge mechanisms for the sediments
    • B01D21/2483—Means or provisions for manually removing the sediments
    • 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
    • B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
    • B01D21/286—Means for gentle agitation for enhancing flocculation
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/18—Removal of treatment agents after treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage

Definitions

  • 096/32194 discloses a water treatment composition in unit dose form capable of batchwise purification of water for drinking purposes comprising a disinfecting agent, a coagulant-precipitate agent, a primary and a secondary flocculent, a dispersion-buffer agent, an agglomeration matrix and prefilter and a bulk ion-exchange adsorbent.
  • O02/00557 discloses a water purification . composition along with a nutrient additive.
  • composition disclosed comprises a primary coagulant, a bridging flocculent and a coagulant aid.
  • O02/00557 also discloses a method for clarifying and purifying water, which requires a multi-step treatment involving coagulation and flocculation, disinfection, filtration, neutralization and nutrifying.
  • a problem with coagulation and flocculation processes such as those described above is that although the treatment and purification compositions serve in isolating the impurities as a floe from water, there is a risk that the cleaned water may become recontaminated by the floe, since this will lie at the bottom of the container holding the cleaned water. If the floe is disturbed during handling of the purified water then there is a risk of recontamination. Therefore, very careful handling of the purified water is required to avoid problems of recontamination. In particular, when water is being purified in bulk, to separate the cleaned water from the floe at the bottom requires lifting of a heavy container and careful drainage of the cleaned water from the top. This is a cumbersome and difficult process for consumers.
  • water treated by coagulation and flocculation processes often includes excess disinfectant or other by- products generated during the flocculation process which makes it unsuitable for direct human consumption.
  • the object of the present invention is to provide a water purification system based on a coagulation and flocculation process which can effectively separate the impurities as a floe from the clean water and at the same time avoid the problem of recontamination of the cleaned water by the floe.
  • the system of the invention can purify bulk quantities of impure water from a variety of sources in a convenient and cost-effective manner, and is suitable for use on a wide scale and even in remote rural locations.
  • the system of the invention can also provide purified water which is free of excessive disinfectants or harmful byproducts usually released during the treatment process, so that it is suitable for direct human consumption.
  • the system of the invention is also cost-effective and simple for use even in remote rural locations.
  • the invention provides a water purification system comprising a water treatment chamber for the treatment of water by a coagulation and flocculation process comprising an outlet adapted for the discharge of treated water and an outlet adapted for the discharge of floes generated by the coagulation and flocculation process.
  • any conventional coagulation and flocculation process as is understood by those skilled by the art can be used.
  • the outlet adapted for the discharge of treated water can be adapted to allow discharge of treated water by suction or by gravity flow.
  • the outlet adapted for the discharge of floes can comprise an opening at the bottom of the treatment chamber which can be opened to release the floe and may be kept closed when the water treatment is being carried out or when the treated water is required to be discharged from the chamber.
  • the opening can be a pluggable opening, which can releasably open or close the floe discharge outlet.
  • the plug can be operatively connected to a pull cord such as a string or chain.
  • the system preferably includes a stirrer to maintain the water in a turbulent or agitated state to facilitate the cleaning process.
  • a water purification system comprising: a treatment chamber adapted for treatment of water by a coagulation and flocculation process to thereby separate a floe of impurities at the bottom of the treatment chamber; a collection chamber for treated water under the treatment chamber; - a siphon filter adapted to suck in treated water from the treatment chamber free of floes and connected to at least one additional filter unit comprising an adsorbent for further purification of the treated water, the outlet of the additional filter unit being connected to the collection chamber; a discharge outlet for the treated water stored in the collection chamber, and a releasably pluggable floe discharge outlet at the bottom wall of the treatment chamber, the top wall of the collection chamber being angularly disposed with respect to the bottom wall of the treatment chamber so as to define a floe collection unit therebetween, so that on opening of floe discharge outlet, the floe is transmitted to the floe collection unit.
  • the siphon filter comprises a pair of substantially parallel tubular arms connected by a bridging tubular member.
  • one tubular arm has an inlet for the suction of purified water from the treatment chamber which is adapted to be rotated, so that when the coagulation and flocculation process is being carried out the inlet is above the water level in the treatment chamber, and when the coagulation and flocculation process is completed, the inlet can be rotated so that it is placed in the treated water in the treatment chamber.
  • the other tubular arm of the siphon filter is typically connected to a bed of adsorbent material so as to adsorb excess disinfectant or byproducts in the treated water. In operation, treated water is sucked from the treatment chamber through the tubular arm having the inlet. The treated water then passes into the other tubular arm via the bridging tubular member and then traverses through the bed of adsorbent material.
  • the siphon filter can be secured to the treatment chamber with the bridging tubular member passing through a side wall of the treatment chamber. To facilitate the rotation of the tubular arm having the inlet, it may suitably be connected to a flip joint. Alternatively, it is also possible to provide an independent siphon filter having the same features but not requiring the flip joint. Such an independent siphon filter can be removably fitted to the treatment chamber as and when suction of the treated water is required. Suction through the independent siphon filter may be provided by a device such as a bellows, piston, syringe, elastic bulb, balloon or the like, or may alternatively be provided by mouth.
  • a water purification system comprising: - a treatment chamber adapted for treatment of water by a coagulation and flocculation process to thereby separate a floe of impurities at the bottom of the treatment chamber; a collection chamber for treated water under the treatment chamber; gravity based discharge means connected to the water treatment chamber for discharge of the treated water free of floes from the treatment chamber to the collection chamber via an adsorbent media adapted to adsorb excess disinfectant or byproducts generated during the coagulation and flocculation process; a discharge outlet for the treated water stored in the collection chamber, and a releasably pluggable floe discharge outlet at the bottom wall of the treatment chamber, the top wall of the collection chamber being angularly disposed with respect to the bottom wall of the treatment chamber so as to define a floe collection unit therebetween, so that on opening of floe discharge outlet, the floe is transmitted to the floe collection unit.
  • the connection of the treatment chamber adapted for treatment of water by a coagulation and flocculation process
  • the inlet end of the siphon or pathway between the top and bottom chambers is provided with a barrier or closure so that no floe or other impurities are carried along with the treated water into the adsorbent media and further into the collection chamber.
  • the stirrer can be a manually-operated device such as a ladle, rod, or spoon or a semi-mechanical device such as an impeller attached to a spring-loaded rod in which the spring acts to move the impeller.
  • the stirrer may also be in the form of a vertical tube that divides into multiple horizontal hollow blades so that when air is pumped into the vertical tube it flows through the hollow blades to generate bubbles which bring about agitation and stirring.
  • the horizontal hollow blades can be straight or curved. It is also possible to have mechanical arrangements such as a lever to rotate the stirrer to agitate the water during its treatment.
  • a water purification method comprising treating the water by a coagulation and flocculation process in a water treatment system comprising an outlet adapted for the discharge of treated water and an outlet adapted for the discharge of floes generated by the coagulation and flocculation process, in which the floe is separated from the treated water using a siphon filter or by gravity flow, and in which the treated water passes through an adsorbent bed to adsorb excess disinfectants or byproducts from the treatment process before being collected for discharge by the user.
  • Figure 1 is a sectional view of a purification system in accordance with the invention involving a siphon filter
  • FIG. 2 is another embodiment of a purification system in accordance with the invention involving a portable siphon filter
  • Figure 2A is an illustration of the portable siphon filter used in the system of Figure 2;
  • Figure 3 is a sectional view of another embodiment of a purification system in accordance with the invention involving gravity flow;
  • Figure 4 is another embodiment of the purification system in accordance with the invention involving gravity flow;
  • Figures 5A & 5B illustrate two variants of the stirrer used in the water purification system in accordance with the present invention.
  • a top treatment chamber (1) is adapted to store impure water for treatment and purification. Under the top chamber is a bottom chamber (2) for storing of the purified water.
  • the bottom wall of the top treatment chamber is provided with a floe discharge opening (8), which can be releasably closed by a plug (9).
  • the plug (9) plugs the opening (8) during the treatment process.
  • the plug (9) is removed from the opening (8), by a chain.
  • the opening (8) is connected to a floe collection unit (10) .
  • the floe collection unit (10) comprises an inclined surface (2A) facing the opening (8) . This inclined surface constitutes the top wall (2A) of the bottom chamber (2) such that together with the bottom wall (1A) of the top chamber (1) it defines an angular inclined passage for the floe to be collected.
  • the top chamber (1) is provided with a mechanical stirrer (11) to agitate the impure water for effective flocculation.
  • a siphon filter is provided to discharge the purified water from the top chamber (1) .
  • the siphon filter comprises two tubular arms (3 and 3b) connected by a bridging tubular member.
  • the arm (3) is adapted so that it can be rotated by an angle of from 90 to 270° by means of a flip joint (5) .
  • the arm (3) is rotated by about 180° it assumes the position (3a) indicated by the dotted line in the Figure. In this position, water cannot travel from the top chamber (1) into the siphon filter, since its opening lies above the water level in the top chamber (1) . After treatment is completed and the floes are allowed to settle the treated water is then required to be discharged from the top chamber (1) .
  • the arm is rotated and brought to its position (3) .
  • the treated water will be sucked into the tubular arm (3), and carried out of the top chamber (1) through tubular arm (3b) and adsorbent media (6).
  • Barrier means (4) provided to the inlet end of tubular arm (3) prevents entry of floe into tubular arm (3) .
  • Adsorbent media (6) adsorbs excess disinfectant or byproducts generated during the treatment process from the treated water. From adsorbent media (6), the water is transmitted into the bottom chamber (2) through an opening at its top. After purified water accumulates in the bottom chamber (2), it can be discharged as and when required from the tap (7) for safe drinking.
  • FIG 2 shows another embodiment of the purification system of the invention involving a siphon filter.
  • the portable siphon comprises a tube (T) provided with a barrier means (4) at the inlet end.
  • An adjustable spacer (AS) is provided which enables the portable siphon filter to be located on the top chamber and its inlet adjusted with respect to the water level.
  • a suction device (S) is provided to facilitate the suction operation of the water from the top chamber and into the adsorbent media (6).
  • a valve (7a) is provided to control the water flow from the tube (T) to the adsorbent media (6). From the adsorbent media the purified water is transmitted to the bottom chamber as in the embodiment of Figure 1.
  • the portable siphon filter is shown in greater detail in accompanying figure 2a.
  • FIG. 3 illustrates a purification system of the invention involving a gravity feed flow is illustrated.
  • the adsorbent media is provided in a tubular member which is supported from the bottom wall of the top chamber so that it extends into the top of the bottom chamber.
  • the opening of the tubular member is closed by a stopper (ST) so as to block the pressure of water from the top to the bottom chamber during the flocculation process.
  • the stopper (ST) can be released to open communication between the top chamber and the bottom chamber through the adsorbent media.
  • the discharge of the purified water from the top chamber to the bottom chamber through said adsorbent media (6) is carried out by gravity flow.
  • the purified water from the bottom chamber can be taken out through the tap (7) .
  • FIG. 4 illustrates another embodiment of a gravity flow purification system according to the present invention.
  • the communication path between the top and bottom chamber is not through the bottom wall of the top chamber but through an external passage (P) connecting the lower side of the top chamber to the top side of the bottom chamber.
  • a stopcock (SC) is provided to selectively close the entry of the water into the passage (P) from the top chamber until flocculation is complete.
  • the water from the top chamber is transmitted through the passage (P) into the bottom chamber through the adsorbent media (6) housed in the bottom chamber to provide purified water in the bottom chamber. Occasionally, as and when required by opening of tap (7) pure and safe drinking water can be released from the bottom chamber.
  • a stirrer means is usually provided.
  • the stirrer involves a semi-mechanical impeller attached to a spring- loaded rod where the spring (SP) acts to move the impeller.
  • the stirrer comprises a tubular vertical member that divides into multiple horizontal hollow blades.
  • a compressible bulb (B) is provided at the top open end of the vertical stirrer through which air can be passed to agitate the water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

L'invention porte sur un système de purification de l'eau comprenant une chambre de traitement de l'eau par coagulation et floculation, présentant un orifice d'évacuation de l'eau, et un orifice d'évacuation des flocs résultant du processus de coagulation et floculation. Ledit système assure une séparation efficace des impuretés sous forme de flocs d'avec l'eau, tout en évitant la recontamination des eaux épurées par les flocs. Il est adapté au traitement de grosses quantités d'eaux polluées d'une grande variété de sources, pratique, économique, et utilisable à grande échelle même dans des sites ruraux reculés.
PCT/EP2004/005802 2003-06-27 2004-05-28 Systeme d'epuration WO2005003040A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN666MU2003 2003-06-27
IN666/MUM/03 2003-06-27

Publications (1)

Publication Number Publication Date
WO2005003040A1 true WO2005003040A1 (fr) 2005-01-13

Family

ID=33561922

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/005802 WO2005003040A1 (fr) 2003-06-27 2004-05-28 Systeme d'epuration

Country Status (1)

Country Link
WO (1) WO2005003040A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008010770A1 (fr) * 2006-07-17 2008-01-24 B G Consulting Hb Procédé et dispositif d'épuration des eaux usées
GB2459896A (en) * 2008-05-09 2009-11-11 Hydro Int Plc A stormwater gully
WO2010083149A3 (fr) * 2009-01-13 2011-09-01 Access Business Group International Llc Système de traitement de l'eau à alimentation par gravité
GB2487161A (en) * 2012-04-16 2012-07-11 Hydro Int Plc A drain-down outlet for a stormwater gully
CN106621490A (zh) * 2016-11-09 2017-05-10 江阴兴澄特种钢铁有限公司 一种带自动平衡门的澄清池反应装置
CN106705261A (zh) * 2017-02-04 2017-05-24 宁波工程学院 一种基于双极荷电凝并的空气净化器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835045A (en) * 1972-08-24 1974-09-10 V Hussissian Method of flocculating
US5122263A (en) * 1989-08-22 1992-06-16 Huber Hans G Continuously and automatically functioning device for the drainage of sludge, especially of sewage sludge
EP0599324A1 (fr) * 1992-11-27 1994-06-01 Hans-Georg Huber Dispositif pour la flocculation de matières solides à partir de suspensions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835045A (en) * 1972-08-24 1974-09-10 V Hussissian Method of flocculating
US5122263A (en) * 1989-08-22 1992-06-16 Huber Hans G Continuously and automatically functioning device for the drainage of sludge, especially of sewage sludge
EP0599324A1 (fr) * 1992-11-27 1994-06-01 Hans-Georg Huber Dispositif pour la flocculation de matières solides à partir de suspensions

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8133394B2 (en) 2006-07-17 2012-03-13 B G Consulting Hb Method for purifying wastewater
WO2008010770A1 (fr) * 2006-07-17 2008-01-24 B G Consulting Hb Procédé et dispositif d'épuration des eaux usées
GB2459896B (en) * 2008-05-09 2012-12-26 Hydro Int Plc A stormwater gully
GB2459896A (en) * 2008-05-09 2009-11-11 Hydro Int Plc A stormwater gully
US8480887B2 (en) 2008-05-09 2013-07-09 Hydro International Plc Stormwater gully
US8623204B2 (en) 2008-05-09 2014-01-07 Hydro International Plc Stormwater gully
WO2010083149A3 (fr) * 2009-01-13 2011-09-01 Access Business Group International Llc Système de traitement de l'eau à alimentation par gravité
US9352979B2 (en) 2009-01-13 2016-05-31 Access Business Group International Llc Gravity feed water treatment system
US10336639B2 (en) 2009-01-13 2019-07-02 Access Business Group International Llc Gravity feed water treatment system
GB2487161A (en) * 2012-04-16 2012-07-11 Hydro Int Plc A drain-down outlet for a stormwater gully
GB2487161B (en) * 2012-04-16 2012-12-26 Hydro Int Plc A stormwater gully
CN106621490A (zh) * 2016-11-09 2017-05-10 江阴兴澄特种钢铁有限公司 一种带自动平衡门的澄清池反应装置
CN106705261A (zh) * 2017-02-04 2017-05-24 宁波工程学院 一种基于双极荷电凝并的空气净化器

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