EP2470478A1 - Method and apparatus for the purification of waste water - Google Patents
Method and apparatus for the purification of waste waterInfo
- Publication number
- EP2470478A1 EP2470478A1 EP10811325A EP10811325A EP2470478A1 EP 2470478 A1 EP2470478 A1 EP 2470478A1 EP 10811325 A EP10811325 A EP 10811325A EP 10811325 A EP10811325 A EP 10811325A EP 2470478 A1 EP2470478 A1 EP 2470478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wastewater
- tank
- separation tower
- flock
- level
- 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.)
- Withdrawn
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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1437—Flotation machines using electroflotation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- 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
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46152—Electrodes characterised by the shape or form
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4618—Supplying or removing reactants or electrolyte
-
- 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
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
Definitions
- the invention relates to a method for the purification of wastewater, said method comprising passing waste water into a tank for a purification treat- ment.
- the invention relates also to an apparatus for the purification of wastewater, said apparatus comprising a tank which contains wastewater bound for a purification treatment.
- the invention is primarily applied to the purification of municipal sewage waters by making use of the clarification tanks of existing sewage treatment plants. It is an object of the invention to substantially enhance the operation of existing sewage treatment plants, and particularly to improve the degree of purification.
- Wastewater is passed from the tank 14 across the electrolytic cell 3 into the separation tower 7 by means of a hydrostatic pressure existing in the wastewater present in the tank 14.
- the wastewater is passed into the electrolytic cell 3 across a filter 4 submerged in the tank, the latter typically removing particles larger than 01mm.
- the elec- trolytic cell 3 includes one or more cell elements equipped with an iron and/or aluminum electrode 2.
- the one or more cell elements are selected according to the grade of wastewater bound for treatment. The use of several successive cell elements enables a better distribution of electric current over a longer distance of water flow. In demanding purification projects, it is possible to employ an iron electrode between aluminum electrodes.
- An inner electrode 1 is surrounded by one or more tubular iron or aluminum electrodes 2.
- the outer electrode 2 is connected to the plus pole of a direct current supply 11 and the inner electrode 1 to the minus pole. If several electrodes are used, it preferable to respectively employ separate and individu- ally controlled power sources in order to enable the individual current regulation for each electrode.
- the inner electrode can be made of stainless steel, nickel, chromium, platinum, or precious metal alloys with a major difference in electronegativity with respect to aluminum and iron.
- a cell element equipped with the iron and/or aluminum electrode 2 generates iron and/or aluminum hydroxide, working as a molecular sieve. This molecular sieve and soluble and particulate impurities trapped therein are enabled, by means of hydrogen released in electrolysis, to rise up into the water and flock separation tower 7 mounted on a top end of the cell 3.
- the riser pipe is provided over a section of its length with a mesh wall 8, which does not function as a sieve but, instead, as a flow guide.
- the separation tower 7 is surrounded by a treated water collecting pipe 16 fitted with a pipe branch 9, which is intended for the outlet of treated water and which is adjustable in terms of its elevation level. Above the pipe branch 9, flock is re- moved from the separation tower 7 by way of a pipe branch 10, e.g. onto a conveyor.
- a standing pipe associated with the treated water outlet pipe 9 may connect directly to the separation tower 7 below the flock formation zone, in which case the mesh wall 8 and the water collecting pipe 16 are omitted.
- the level adjustment of a water discharge point i.e. the pipe branch 9 can be used for regulating the dry content of the outgoing flock 13 as the eleva- tion level of the pipe branch 9 determines the level of water in the pipe 16, the latter establishing a communicating vessel with the separation tower 7.
- the moisture of the flock 13 can be maintained sufficient for its removal from the pipe 10 by self-lubrication, with no need for a separate scraper.
- the flock can be removed from an open top of the separation tower 7 by means of a scraper, or the outlet pipe 10 can be provided with a conveyor.
- the electrolytic cell 3 and the separation tower 7 are preferably housed in a container 15, which is submerged in and anchored to the attachment with the tank 14. Inside the container 15 is a space void of wastewater, which functions as a maintenance space, and at the same time isolates the wastewater present in the tank 14 from the cell 3 and the separation tower 7.
- the location level of the entire apparatus in the container 15 can be made ad- justable. The location level of the apparatus must be selected in such a way that a sharp interface between the evolving flock 13 and the purified water in the separation tower 7 settles below the wastewater level of the tank 14, whereby the hydrostatic pressure of water in the tank and the buoyancy of hydrogen jointly establish necessary flows across the apparatus.
- the container 15 can also be replaced with a small casing for housing the apparatus, whereby the casing, along with the apparatus therein, can be hoisted completely away from the tank for maintenance.
- a plurality of purification units consisting of the cell 3 and the separation tower 7 depicted in the figure, can be constructed in a parallel relationship, whereby a valve 12 associated with a supply pipe 6 can be used for selecting the number of currently working purification units according to the amount of incoming wastewater.
- the incoming wastewater is conducted e.g. by way of a overflow or a pump from the preceding tank to the next tank, in which latter the method and apparatus of the invention are used for the final purifi- cation of wastewater.
- the purification of wastewater becomes faster and the degree of purification is improved.
- a particular benefit gained by the invention is that the passage of wastewa- ter across an apparatus of the invention does not require any pumps, but the flow is established by a hydrostatic pressure and by hydrogen generated as a reaction gas.
- the invention is applicable, among others, to the purification of municipal wastewaters in the way of upgrading and enhancing the presently operating facilities.
- the invention can be applied to the purification of all types of wastewater.
- the apparatus according to the invention can be installed in an existing sew- age treatment plant without suspending its operation. Aeration and sedimentation tanks can be decommissioned for a reduced surface area.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Biotechnology (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20095877A FI123434B (en) | 2009-08-26 | 2009-08-26 | Method and apparatus for purifying waste water |
PCT/FI2010/050647 WO2011023851A1 (en) | 2009-08-26 | 2010-08-17 | Method and apparatus for the purification of waste water |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2470478A1 true EP2470478A1 (en) | 2012-07-04 |
EP2470478A4 EP2470478A4 (en) | 2016-09-21 |
Family
ID=41050702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10811325.9A Withdrawn EP2470478A4 (en) | 2009-08-26 | 2010-08-17 | Method and apparatus for the purification of waste water |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2470478A4 (en) |
FI (1) | FI123434B (en) |
WO (1) | WO2011023851A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE539404C2 (en) | 2015-10-08 | 2017-09-12 | Axolot Solutions Ab | Electroflotation apparatus having an outlet pipe with a low turbulence orifice |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60175594A (en) * | 1984-02-21 | 1985-09-09 | Mitsukawa Kogyo Kk | Electrolytic treatment apparatus for oil-containing waste water |
DE4024424A1 (en) * | 1990-08-01 | 1992-02-06 | Iwatech Konrad Gmbh | METHOD AND DEVICE FOR TREATING POLLUTED LIQUIDS |
US6086732A (en) * | 1994-11-18 | 2000-07-11 | Bcde Group Waste Management Ltd Oy | Flock separating apparatus |
WO1996015989A1 (en) * | 1994-11-18 | 1996-05-30 | Hls-Elektroautomatiikka Oy | Flock separating apparatus |
JP2000117260A (en) * | 1998-10-14 | 2000-04-25 | Hitachi Naka Electronics Co Ltd | Waste water discharging section |
-
2009
- 2009-08-26 FI FI20095877A patent/FI123434B/en not_active IP Right Cessation
-
2010
- 2010-08-17 WO PCT/FI2010/050647 patent/WO2011023851A1/en active Application Filing
- 2010-08-17 EP EP10811325.9A patent/EP2470478A4/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2011023851A1 * |
Also Published As
Publication number | Publication date |
---|---|
FI123434B (en) | 2013-04-30 |
FI20095877A (en) | 2011-02-27 |
EP2470478A4 (en) | 2016-09-21 |
WO2011023851A1 (en) | 2011-03-03 |
FI20095877A0 (en) | 2009-08-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20120326 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SUOMINEN, HANNU |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SUOMINEN, HANNU |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SUOMINEN, LAURI HANNUNPOIKA |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SUOMINEN, HANNU |
|
RA4 | Supplementary search report drawn up and despatched (corrected) |
Effective date: 20160824 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C02F 1/463 20060101ALI20160818BHEP Ipc: C02F 1/465 20060101AFI20160818BHEP Ipc: B03D 1/14 20060101ALI20160818BHEP Ipc: C02F 1/00 20060101ALI20160818BHEP Ipc: C02F 1/461 20060101ALI20160818BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20180301 |