WO2015103649A2 - Traitement d'eau - Google Patents

Traitement d'eau Download PDF

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Publication number
WO2015103649A2
WO2015103649A2 PCT/ZA2014/000080 ZA2014000080W WO2015103649A2 WO 2015103649 A2 WO2015103649 A2 WO 2015103649A2 ZA 2014000080 W ZA2014000080 W ZA 2014000080W WO 2015103649 A2 WO2015103649 A2 WO 2015103649A2
Authority
WO
WIPO (PCT)
Prior art keywords
water
electronic
treated
die
sedimentation
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/ZA2014/000080
Other languages
English (en)
Other versions
WO2015103649A3 (fr
Inventor
Howard Francis ALBOROUGH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SANAQUA HCA Pty Ltd
Original Assignee
SANAQUA HCA Pty 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 SANAQUA HCA Pty Ltd filed Critical SANAQUA HCA Pty Ltd
Publication of WO2015103649A2 publication Critical patent/WO2015103649A2/fr
Publication of WO2015103649A3 publication Critical patent/WO2015103649A3/fr
Anticipated expiration legal-status Critical
Priority to ZA2016/04412A priority Critical patent/ZA201604412B/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • 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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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
    • C02F2001/007—Processes including a sedimentation step

Definitions

  • the invention is concerned with a water treatment process where f!oc is formed in the water and then is removed by a separation process such as sedimentation or fiuradon. Sedimentation is used where large amounts- of water are treated . Normally the clear water from the sedimentation system is subsequently subject to filtration and also to purification by means of die addition of chlorine.
  • a method of treating water contprishig comprising electrodes: the suriaces of which : comprise inert metals , preferably inert, mixed metal oxides, adding fiocculanis vo t e water and then passing the treated water to a separation process from which the treated water is passed oat for use.
  • die flocculants are added to die water prior to the- electronic fluid treatment.
  • the water to which the fioceclants have been added are preferably passed through a mixing chamber comp i in a fioccalanon channel or a rloeeulaiion tank to ive th floeculam time to mix with the water and to coagulate and to form floe.
  • Such time is preferably of the order of two to ten minutes, convenientl two to five minutes but also between eight and ten
  • the electronic fluid treatment may be carried out in apparatus wherein the electrodes preferably comprise metal coated with an men metal , preferably a mixed metal oxide, which is preferably ruthenium oxjde. As a consequence the electrodes do ⁇ not dissolve in water during the electronic water treatment and therefore the electrodes have a long useful life,
  • the water being treated has high levels of iron, aluminum, manganese * and/or organic material
  • the water is preferably treated with ozone prior to the electronic process.
  • This serves as a booster for floceidailon and sealing - boosting the oxidation environment which is increased due to the ultrasound and electromagnetic etrect of the electronic water treatment.
  • the additio of ozone will increase the formation of hydroxides which precipitate out in the separation process,
  • the ozone is added in an. amount of about I gram per ' kilolitre of water used.
  • the water is preferably treated before the remaining steps with sulphuric aeid or hydrochloric acid until the neutral pH of 7 or lower is achieved:.
  • the pH of the taw water is neutral or acidic, it is preferably rea ed after the electronic process, and efore sed imentation, by adding lime until file desired pl L which is preferably 8.5 to 9. S is achieved,
  • the electronic cell may be as described and: il lustrated in
  • This fiiiration is preferably carried out in a filter, t may be .a ..slow . .sand . filter or a rapid sand filter.
  • FIG. i a flow diagram of a system 10 of the invention for treating water in an amount of 500 M l/d.
  • the system is arranged for use with alkaline water which has a pH of above 8.0 and which includes dissolved organic materials.
  • T he raw water is treated at 1 2 with sulphuric or hydroch loric acid,
  • the dosing is continuous in die water flow hut is adjusted incrementally with a measurement of the pi I after each dosing until the pH is at about the desired pH of H 7. This is high ly desirable because die chem ical reaction (to be described) is more, ⁇ efficient where the water is . neu ral or acidic .
  • the noceuiarn used in th is method is a irivaiem metal Ooeculant (a poly ammmiurn chloride type polymer) , it is preferably aiummium sulphate or ferric or ferrous sulphate.
  • the amount of fioccuiant to be added is established by carrying out a jar test. Thi comprises putting : the pB corrected water into a beaker and then adding fioccuiant in progressive steps to achieve a dosed concentration range of between 0.024 % to 0.0025 % m/ffl.
  • the rate of seaJernem i. e.
  • the average dosage rate is between 2rag/i to 4mg/l depending on streaming current detector dosage rale indication.
  • the water is now- assed through what is herein called a " mixing chamber" 1 6 i.e. a flocculation channel or floccu iaiion tank for a period of two to five minutes to give the fioccuiant time to mix with the water and coagulate and form Hoc .
  • a mixing chamber 1 6 i.e. a flocculation channel or floccu iaiion tank for a period of two to five minutes to give the fioccuiant time to mix with the water and coagulate and form Hoc .
  • ozone is added at 18 to d e water in an amount of 1 gram ozone per kilolitre of water being treated.
  • the water is- then treated in a electronic process at 2.0 comprising a set of eieciroiiic units as described with reference to and as illustrated in Figures I to 4 of WO 2009/ 156840,
  • the electrodes comprise thick, titanium grade 1 plate which is electroplated with ruthenium or ruthenium ox ide, which is an inert platinum group metal,
  • the water is now passed to a conventional sedimentation treatment plant 24, '
  • the sedimentation plant 24 comprises two sedimentation tanks each of four point f ve metres diameter and thre metre to base.
  • the size is such thai the upflow rate is lower than the settling rate of the floe, ff he settling rate is the rate of settling of the floe through the distance it must travel and is measured in metres per hour).
  • the retention time in the settling tank is typically between thirty minutes to one hour.
  • the process is for treating water in an amount of 2.0 Mi/id.
  • the raw water pH was in the region of pH 6.8 to pH 7.
  • the water is dosed with floc-culent.
  • The.. fd Occident used is alum (aluminium su lphate 16 HfO) .
  • the dosage rate was calculated on the raw water jar test to give a dosage rate of dOvng/l to i20mg/l.
  • the water is passed through a mixing chamber 16 comprised by a fioceulatioa channel with a retention ime of 8 to 10 mrnufes for better floe formation and then is subject to be treated in the electronic process
  • the treated water is then dosed withoptione to ring , its pie to about neutral i .e, 7.2.
  • the sed i entation plant comprises three sedi eaiauon tanks , each of hich is twelve metres long by tour metres wide and three metres to base.
  • the water from th electronic process after being treated with lime is then passed into the sedimentation plant.
  • the .retention time in the sedimentation tank is one to two hours.

Landscapes

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

Abstract

Un procédé de traitement d'eau consiste à ajouter un floculant à l'eau à traiter, puis à soumettre cette eau à un traitement électronique. Le traitement électronique a lieu dans un appareil comprenant des électrodes revêtues d'hydroxyde de ruthénium et donc inertes. L'eau est ensuite soumise à une séparation dans une cuve de sédimentation ou un filtre.
PCT/ZA2014/000080 2013-12-23 2014-12-23 Traitement d'eau Ceased WO2015103649A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2016/04412A ZA201604412B (en) 2013-12-23 2016-06-29 Water treatment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA201309746 2013-12-23
ZA2013/09746 2013-12-23

Publications (2)

Publication Number Publication Date
WO2015103649A2 true WO2015103649A2 (fr) 2015-07-09
WO2015103649A3 WO2015103649A3 (fr) 2016-03-17

Family

ID=53494246

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2014/000080 Ceased WO2015103649A2 (fr) 2013-12-23 2014-12-23 Traitement d'eau

Country Status (2)

Country Link
WO (1) WO2015103649A2 (fr)
ZA (1) ZA201604412B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107616115A (zh) * 2017-09-13 2018-01-23 沈华斌 一种畜牧业养殖供水装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT377546B (de) * 1983-02-25 1985-03-25 Dieter J Becker Verfahren zur reinigung von bei der zellstoffherstellung, insbesondere bei der chlorbleiche von zellstoff, anfallenden abwaessern
CN101979344B (zh) * 2010-10-28 2012-07-25 波鹰(厦门)科技有限公司 基于纳米催化电解技术和膜技术的制革废水处理回用方法

Also Published As

Publication number Publication date
WO2015103649A3 (fr) 2016-03-17
ZA201604412B (en) 2017-09-27

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