WO2011031239A1 - Système de désinfection de l'eau de lest - Google Patents

Système de désinfection de l'eau de lest Download PDF

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Publication number
WO2011031239A1
WO2011031239A1 PCT/SG2010/000332 SG2010000332W WO2011031239A1 WO 2011031239 A1 WO2011031239 A1 WO 2011031239A1 SG 2010000332 W SG2010000332 W SG 2010000332W WO 2011031239 A1 WO2011031239 A1 WO 2011031239A1
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WO
WIPO (PCT)
Prior art keywords
water
housing
electrodes
disinfector
electrode
Prior art date
Application number
PCT/SG2010/000332
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English (en)
Other versions
WO2011031239A8 (fr
Inventor
Jiaping Paul Chen
Yu-ming ZHENG
K. G. Nadesshani Nanayakkara
Khorshed Alam Akm
Original Assignee
National University Of Singapore
The Maritime And Port Authority Of Singapore
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 National University Of Singapore, The Maritime And Port Authority Of Singapore filed Critical National University Of Singapore
Priority to SG2012015780A priority Critical patent/SG179013A1/en
Publication of WO2011031239A1 publication Critical patent/WO2011031239A1/fr
Publication of WO2011031239A8 publication Critical patent/WO2011031239A8/fr

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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
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
    • 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
    • C02F2001/46138—Electrodes comprising a substrate and a coating
    • 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
    • C02F2001/46157—Perforated or foraminous electrodes
    • 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
    • C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water

Definitions

  • the invention relates to environmental issues surrounding shipping, for instance ballast water management.
  • Ballast is used to maintain the balance of ships.
  • the ballast is particularly important when a ship is empty of cargo.
  • solid materials such as rocks and sands are used as ballast.
  • Modern ships use water as ballast.
  • the ballast water (BW) carries many unwanted marine species, oil and grease (O&G), organics, and solids.
  • the marine species include bacteria and other microbes, planktonic species, small invertebrates and the spores, eggs and larvae of larger species.
  • the survival of these microorganisms depends on many factors. Some species are able to survive to form viable populations. Once survived in the journey and introduced to a foreign environment, those organisms can become invaders to the new environment. Newly-established species are harmful to human health (e.g., vibrio cholerae), and to the bio-diversity of marine environment.
  • ballast water carried in ships per year can be as high as 10 billion tons per year. It is estimated that in the USA alone, the cost of all invasive species exceeds several hundred billion USD per year.
  • ballast water management system BWMS
  • BWMS ballast water management system
  • ballast water treatment Current technologies for ballast water treatment are typically based on systems with buffer capacities. Most of the studies in literatures are limited to small-scale test where the ballast water is treated by either ex-situ (outside ballast tanks) or in-situ systems (within ballast tanks), involving both physical and chemical treatments.
  • the processes include granular media filtration, thermal treatment, UV irradiation, ozone treatment, chlonnation, membrane filtration, and advanced oxidation. While good inactivation of the microorganisms is reported, the treatment efficiency for O&G and solids remains unacceptable.
  • the hydraulic retention time of existing technologies is often high. As ballast water has an extremely high flow rate often ranging from 600 to 1000 m /hr, the current technologies may not be suitable. Hence, this invention aims to disclose a cost-effective technology for ballast water treatment by employing electrochemical technology.
  • the invention provides a disinfector for disinfection of ballast water comprising a housing having an inlet and outlet for the transmission of ballast water through the housing; a plurality of electrodes in the housing representing anode and cathode electrodes; wherein each of said electrodes includes an array of apertures distributed over at least a portion of the electrode so as to permit the ballast water to flow through the electrode.
  • the invention provides a disinfector for the disinfection of ballast water comprising a housing having an inlet and outlet for the transmission of ballast water through the housing; a plurality of electrodes in the housing representing anode and cathode electrodes; wherein each of said electrodes is made from a titanium member having a metal oxide coating.
  • the invention provides a water management system comprising a water source for the supply of water to be disinfected; a disinfector for disinfecting said water, said disinfector comprising a housing having an inlet and outlet for the transmission of the water through the housing; a plurality of electrodes in the housing representing anode and cathode electrodes for eletrolytically disinfecting said water as it is transmitted through the housing; a water delivery system for removing the water for disposal; and a neutralization system arranged to detect the concentration of TRO within said disinfected water and inject a neutralizing chemical into said water before disposal.
  • the invention provides a method for disinfecting water comprising the steps of: transmitting water to be disinfected through a housing having a plurality of electrodes in the housing representing anode and cathode electrodes; eletrolytically disinfecting said water as it is transmitted through the housing;
  • the invention provides a disinfector for disinfection of wastewater comprising a housing having an inlet and outlet for the transmission of wastewater through the housing; a plurality of electrodes in the housing representing anode and cathode electrodes; wherein each of said electrodes includes an array of apertures distributed over at least a portion of the electrode so as to permit the wastewater to flow through the electrode
  • FIG. 1 A is a schematic view of a ballast water management system according to an embodiment of the present invention.
  • FIG. IB is a schematic view of the ballast water management system according to
  • FIG. 1C is a schematic view of the ballast water management system according to Figure 1 A during the de-ballasting process
  • Figure 2A is an elevation view of an electrode for a reactor according to one embodiment of the present invention.
  • Figure 2B is a schematic view of a reactor according to a further embodiment of the present invention.
  • Figure 3 is an SEM image of an electrode according to a further embodiment of the present invention.
  • Figure 4 is an SEM-EDX characteristic of the electrode of Figure 3;
  • Figures 5A and 5B are elevation views of electrodes according to the prior art;
  • Figures 6A is a graph of experimental data of a reactor according to a further embodiment of the present invention.
  • Figure 6B is a comparison of idealized and actual reactor performance
  • Figure 7 is a graph of voltage variation of an electrode according to a further embodiment of the present invention.
  • Figure 8 is a graph of chlorine production of an electrode according to a further embodiment of the present invention.
  • Figures 9A to 9D are SEM images of electrodes after 8 days of continuous use;
  • Figure 10 is a graph of electrode performance comparing one embodiment of the present invention to a prior art electrode.
  • BWMS ballasting and de-ballasting according to one embodiment of the present invention.
  • the major aim of the invention is to develop a cost-effective electrolysis technology for ballast water treatment.
  • the focus is on the design of electrodes and disinfector that play key roles in the treatment.
  • the ballast water management system (BWMS) 2 is accomplished by using filtration, electro-disinfection and neutralization of the residual oxidant.
  • the schematic diagram of the process is shown in Figure 1A.
  • the inlet 4 and pump 10 act as a water source for the supply of infected water to the BWMS.
  • the first unit in the treatment is filtration 22.
  • the filtration by using at least one self- cleaning micro-strainer (with size of 5 to 100 um) during the intake 4 process is to ensure to effectively remove organisms and solids, and reduces sediment built-up in the ballast water tanks, which is a potential area for survival and growth of organisms and microorganisms. It may remove various bio-solids (colloidal substances), which can lead to formation of disinfection byproducts (DBPs) in the presence of chlorine. With the filtration system, the amount of disinfectants required will be reduced and the concentrations of DBPs can also be reduced.
  • the filtration is only operated during the ballasting.
  • the operation and cleaning of the micro-strainer(s) is (or are) fully automatic without interrupting the filtration process, and the backwashing water may be returned into the sea in situ or stored in waste storage tank in the ship.
  • the followed electrochemical reactor 28 (also termed as reactor, disinfector, electro- disinfector, or electrolysis unit) is to produce disinfectants (chlorine, 0 3 , hydroxyl radical and other free radicals) for the disinfection.
  • Some of microorganisms (e.g., E. coli) in the ballast water can be directly killed in the disinfector 28, while others are disinfected by residual oxidants in the ballast water tank.
  • the total residual oxidants (TRO) is produced by the disinfector 28 and its concentration is no more than 12 mg/L (TRO as chlorine), which can kill the microorganisms in the ballast tanks and prevent them from the re-activation during the voyage of ship. This value is confirmed by a series of experimental studies (lab- and pilot-scale experiments) for various seawaters (from slightly contaminated to heavily contaminated seawater).
  • the disinfectants are generated by the electrolysis of the seawater! in the electrochemical reactor 28 by the titanium based electrodes.
  • the TRO is measure by a TRO analyzer and controlled at a pre-set value through a computer.
  • the electrochemical reactor system is composed of: rectifier 24, chiller 26, electrodes, control computer 38, TRO analyzer 36, and flow transmitter. As seawater is corrosive, corrosion-proof materials will be used for the construction of the reactor. Chiller 26 may be needed so as to reduce the heat generated by the rectifier 24.
  • the last treatment unit is to neutralize the residual oxidant.
  • a neutralization solution sodium thiosulfate
  • the dosage of sodium thiosulfate is calculated by:
  • the concentration of residual oxidants (mg/L, as chlorine) is determined by the TRO analyzer 36, which provides the real-time measurement.
  • the factor is 0:65 - 0.75.
  • the neutralization system 12 is composed of chemical storage vessel, and the metering pum for chemical injection.
  • the operation and monitoring of the BWMS are controlled by a computer system
  • Valves 18 and 40 are closed. Valves 8, 16 & 30 are opened. The seawater is transmitted the strainer 6, valve 6, pump 10, valve 16, self-cleaning micro-strainer 22, electrochemical disinfector 28 and valve 30 in series, and then fills in the ballast tank 32. The process is shown in Figure IB.
  • the ventilation 34 is turned on so that the hydrogen gas and chlorine gas generated in the electrolysis can quickly be removed, even though both concentrations are extremely low, demonstrated in the theoretical calculation and experimental measurement.
  • Valves 8, 16 & 30 are closed. Valves 18 and 40 are opened. The seawater is pumped for disposal from the ballast tanks 32, and goes through Valve 40, pump 10, and Valve 18 in series, and then is discharged.
  • the TRO analyzer 36 will determine the TRO level so that the dosage of sodium thiosulfate can be determined.
  • the neutralization solution is then injected 12 before the pump, and so before final disposal of the water, to remove the TRO to below 0.1 mg/L.
  • the neutralization concentration is determined by the above equation. The process is illustrated in Figure ic
  • Sodium thiosulfate (Na 2 S 2 0 3 ) is the only chemical required for storage and handling.
  • sodium thiosulfate is stored in stainless steel tank that will be designed and manufactured according to the international design code. As the dosing system is automatic, there is no personal contact of the chemical.
  • the amount of sodium thiosulfate stored is dependent upon the frequency of ballasting and de-ballasting operations, and total ballast capacity of the vessel. For example, for neutralizing ballast water with 1000 m 3 and TRO (as chlorine) of 10 mg/L, the amount of sodium thiosulfate is 7.5 kg (assuming the above factor of 0.75). In the reality, the amount will far below because the TRO of the water for the de-ballasting is expected to range from 0 to 1 mg/L due to the consumption in the disinfection and the natural decay. If the TRO is 1 mg/L and the water volume is 1000 m 3 , for example, the amount of sodium thiosulfate is only 750 grams.
  • FIG. 1 shows one embodiment of the electrode 70 according to the present invention, here is demonstrated a sheet 75 having an array of apertures or perforations arranged to allow the flow of ballast water to pass through the electrode 70.
  • This arrangement provides substantial advantage in flow characteristic within the reactor reducing hydraulic shock losses, whilst still maintaining contact with the ballast water to produce the electrolyzing effect.
  • the array of apertures being uniformly distributed, and covering the entire sheet, it will be appreciated that the array does not necessarily need to cover the entire sheet, but will need to cover a substantial proportion. Further, whilst a uniform array may assist in manufacturing, for the functional purpose of the electrode, thee array does not need to be uniform, but may be a non-uniform array.
  • a further advantage is the use of an expanded slit sheet. Whilst a simple sheet having apertures placed therein provides the flow characteristics, the expanded slit sheet also increases surface area exposed to the ballast water, whist also saving material. Given the high cost coatings applied to electrodes, having the perforations formed through slits 80 compared to removal of material to form the apertures may ⁇ provide a substantial cost saving.
  • the electrode may be formed in a number of different ways, such as the expanded slit sheet shown in Figure 2A, a perforated sheets or a mesh.
  • the aim is to reduce the pressure drop across the disinfector, or reactor.
  • the percentage of apertures, or holes, in the electrode may be about 50%, but may vary 30% depending on the application.
  • a pressure drop (resistance) across the disinfector may be insignificant and will not reduce the pressure (driving force) of water that is in the range 1 to 2 bar.
  • Figure 2B shows a possible arrangement of a reactor 71 having a plurality of electrodes 76, and showing the transmission of ballast water through the housing 72.
  • the electrodes for the anode 74 and the cathode 73 are alternately placed.
  • Figure 2B further shows the benefit of the array of apertures in the electrode.
  • the electrodes provide a barrier, dividing the flow 78.
  • the apertures provide flow paths through the electrodes, and consequently, the flow path of the ballast water through the housing is direct, and not a meandering path around the electrodes, until the flow exits 79 the housing.
  • shock losses reducing the efficiency of the flow are reduced, without detrimentally affecting the disinfecting function of the reactor.
  • a free space 81 is provided adjacent to the outlet. This permits a residence time for the ballast water to fully mix and more completely disinfect the water.
  • the electrodes 76 may extend up to the outlet, and so eliminating the space 81. This could be advantageous for space limitations, or where the number of electrodes is sufficient for mixing and disinfecting, and so not requiring the space.
  • the electrode 70 may be is composed of metals and metal oxides.
  • the coating of the electrode may include Ruthenium Oxide, Titanium Oxide, Iridium Oxide or Lead Oxide. This coating may provide the advantages of:
  • the thickness of coating layer comprised of Ru oxide, Ti oxide etc may be in the range 1 ⁇ to 10 ⁇ . In a further embodiment, the coating may be 3 to 4 ⁇ .
  • the diameter of rod is typically 1 to 3 mm.
  • the geometry can be octagon, oval, parallelogram, trapezoid, pentagon, rectangle, circle, square, and combination of the any two.
  • the main electrochemical disinfector is capable of producing disinfectants on-site to inactivate the microorganisms. Disinfectants such as chlorine, hypochlorous acid, sodium hypochlorite, ozone, and free radicals are produced on-site using the abovementioned reactor.
  • a housing for the electrochemical disinfector may be rectangular or cylindrical typed with the ratio of length to the greatest cross-sectional dimension of above 5 (i.e. L/D > 5, L/H>5, and L/D>5).
  • the greatest cross- sectional dimension include the greater of width and height for a rectangular prism, diameter for a cylinder, or primary axis for an ellipsoidal prism.
  • the length of the reactor may be calculated based upon the design flow rate of ballast water through the reactor, and the desired residence time of the ballast water exposed to the electrodes. Accordingly, the dimensions of reactor may be calculated based on the BWMS design specification.
  • CSTR continuously stirred tank reactor
  • PFR plug flow reactor
  • the effective volume (V, m ) of the reactor 28 is calculated according to Equation (1).
  • V Q x (0.1 ⁇ 5)*10 '3 (1)
  • Q (m 3 /h) is the flow rate of the ballast water.
  • the reactor consists of electrodes: anodes and cathodes. Inner metal (titanium) mesh/plate and/or inner metal coated with metal oxide layer (ruthenium oxide, iridium oxide, lead oxide or their combination) are used as the electrodes. The electrodes are placed perpendicular to the water flow. The area (A, m ) of electrodes can be determined by Equation (2):
  • FIGS. 6A and 6B are an analysis of the flow behavior in the reactor, with Figure 6A being experimental results of the designed reactor system, and Figure 6B being flow patterns for ideal and non-ideal plug flow. As can be seen, the behavior of the disinfector is very similar to the non-ideal plug flow reactor under different flow rate.
  • the water fully flows through the electrochemical disinfector (called as flow-through).
  • the water may also be disinfected by the so-called side-stream method, whereby a proportion of the entire flow is divided from the main line, and subjected to a disinfection process.
  • chlorine is produced and kills microorganisms.
  • short-life chemically powerful oxidants (disinfectants) mainly free radicals
  • Ti mesh is capable of producing enough disinfectants and inactivate E. coli and E. faecalis successfully. Nevertheless, one of the major operational problems associated with the use of Ti mesh in long-run was identified during continuous usage of Ti mesh electrode.
  • Anode 105 is dissolved 110 in seawater electrolyte after two days of continuous operation at 0.04 A as shown in Figure 5A.
  • the cathode 115 has deposits 120 due to the coating of Ca and Mg precipitates, as shown in Figure 5B. Therefore, the Ti electrode cannot be used for a long time and thus limits its applications.
  • the Ru0 2 coated electrodes were used as both anode and cathode in a batch reactor and continuously operated for 8 days at 0.04 A in seawater. No visual damages were observed at the end of the operation. Moreover, the operating voltage did not change significantly during the investigation, as shown in Figure 7, suggesting the electrode is very stable in electrolysis of seawater.
  • the performances of three electrodes of our invention were tested for the chlorine production. They are virtually the same type of electrode; the only differences are that, one is new and not used, one is used but without being cleaned, and the last one is used and cleaned before testing.
  • Figure 8 shows that the used electrodes (particularly the used electrode) outperform the new electrode in the chlorine production. The used electrode that was not cleaned is slightly better than the used electrode that was cleaned.
  • FIG. 9A to 9D more pores are developed on the anodic electrode 135 (anode used for 8 days).
  • 145 is a new electrode in seawater for 8 days on which the electricity was not applied
  • 140 is a cathode operated for 8 days
  • 150 represents a new and un-used electrode.
  • more pores are generated after a period of time (e.g., 8 days in the figure), more surface areas for chlorine production become available and thus more chlorine is produced as indicated in Figure 8.
  • Figure 10 shows the production of chlorine by an electrode 155 according to the present invention as compared to a Ti electrode 160. It is clear that the electrode 155 according to the present invention can produce more chlorine than Ti electrode 160.
  • the electrode in this invention is highly stable and catalytic towards the production of chlorine and other disinfectants, as shown in Figures 7 and 8. At the same time, the energy consumption is lower than many other electrodes, as shown in Figure 10.
  • level of residual disinfectants (TRO) coming out of the disinfector is maintained at a range from 1 to 12 mg/L, so that the issues such as corrosion and chemical safety are minimized.
  • a series of bench- and pilot-scale studies were conducted. The experimental results show the treated ballast water can meet the IMO regulation (G8). For example, at a flow rate of 10-12 m 3 /hour, E.
  • the electrodes may be de-scaled through polarity switching.
  • the polarity of the electrodes may be switched, that is the potential on the cell reversed such that the anode becomes the cathode and the cathode becomes the anode. This switching may occur periodically, for instance every 5 to 10 minutes. This has the benefit of avoiding the cost of pre-treatment, as well as post- treatment of the electrodes to remove the scale physically.
  • ballast water treatment is a significant application for the present invention, it may also be used for disinfection of wastewater, of which salinity is high enough to conduct electricity.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (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)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

Cette invention concerne un système de désinfection de l'eau de lest comprenant un boîtier disposant d'un port d'entrée et d'un port de sortie pour permettre à l'eau de lest de passer dans le boîtier; plusieurs électrodes présentes dans le boîtier servent d'anodes et de cathodes; chacune desdites électrodes comprend un réseau d'ouvertures réparties sur au moins une partie de l'électrode de manière à permettre à l'eau de lest de traverser l'électrode.
PCT/SG2010/000332 2009-09-08 2010-09-08 Système de désinfection de l'eau de lest WO2011031239A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SG2012015780A SG179013A1 (en) 2009-09-08 2010-09-08 System for the disinfection of ballast water

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24038909P 2009-09-08 2009-09-08
US61/240,389 2009-09-08

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WO2011031239A1 true WO2011031239A1 (fr) 2011-03-17
WO2011031239A8 WO2011031239A8 (fr) 2011-05-19

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016028231A1 (fr) * 2014-08-20 2016-02-25 Kalf Technology Pte Ltd Système de traitement d'eaux de ballast et procédé de traitement d'eaux de ballast
JP2016195978A (ja) * 2015-04-06 2016-11-24 大成建設株式会社 感染性排水の曝露防止装置
WO2019003380A1 (fr) * 2017-06-29 2019-01-03 パナソニックＩｐマネジメント株式会社 Dispositif de traitement d'eau de ballast
US11267727B2 (en) * 2012-04-02 2022-03-08 The Bd Of Trustees Of The Leland Stanford Jr Univ Water sterilization devices and uses thereof

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GB425703A (en) * 1933-10-20 1935-03-20 David Johnson Evans Improvements in or relating to electrolytic cells
JPH0633280A (ja) * 1992-07-21 1994-02-08 Japan Carlit Co Ltd:The 飲料水の消毒方法
US20030079992A1 (en) * 2001-04-25 2003-05-01 Wilkins Frederick C. Electrodeionization apparatus with expanded conductive mesh electrode and method
WO2005021443A1 (fr) * 2003-08-29 2005-03-10 Amergin, Llc Procede et systeme de decontamination biologique de l'eau des lests de navires
WO2005061394A1 (fr) * 2003-12-22 2005-07-07 Research Institute Of Industrial Science & Technology Appareil et procedes de traitement d'eau de ballast au moyen d'une electrolyse d'eau de mer naturelle
WO2006058261A2 (fr) * 2004-11-29 2006-06-01 Severn Trent De Nora, Llc Systeme et procede pour le traitement d'eau de ballast
WO2007032577A1 (fr) * 2005-09-14 2007-03-22 Korea Ocean Research And Development Institute Appareil de stérilisation électrolytique pour eau de ballast de bateau
WO2008049179A1 (fr) * 2006-10-24 2008-05-02 Cirne Silva Andre Luiz Système de traitement de l'eau de ballast des navires, des plates-formes pétrolières en mer et de contenants, en général, à l'aide d'un procédé dans un réacteur électrochimique
WO2010037391A1 (fr) * 2008-09-30 2010-04-08 Adept Water Technologies A/S Dispositif et procédé d'élimination d'impuretés microbiennes dans des liquides à base d'eau ainsi qu'utilisation du dispositif
WO2010101841A2 (fr) * 2009-03-02 2010-09-10 Chester Sohn Appareil électrolytique de traitement d'eau de ballast et système de traitement utilisant ledit appareil

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB425703A (en) * 1933-10-20 1935-03-20 David Johnson Evans Improvements in or relating to electrolytic cells
JPH0633280A (ja) * 1992-07-21 1994-02-08 Japan Carlit Co Ltd:The 飲料水の消毒方法
US20030079992A1 (en) * 2001-04-25 2003-05-01 Wilkins Frederick C. Electrodeionization apparatus with expanded conductive mesh electrode and method
WO2005021443A1 (fr) * 2003-08-29 2005-03-10 Amergin, Llc Procede et systeme de decontamination biologique de l'eau des lests de navires
WO2005061394A1 (fr) * 2003-12-22 2005-07-07 Research Institute Of Industrial Science & Technology Appareil et procedes de traitement d'eau de ballast au moyen d'une electrolyse d'eau de mer naturelle
WO2006058261A2 (fr) * 2004-11-29 2006-06-01 Severn Trent De Nora, Llc Systeme et procede pour le traitement d'eau de ballast
WO2007032577A1 (fr) * 2005-09-14 2007-03-22 Korea Ocean Research And Development Institute Appareil de stérilisation électrolytique pour eau de ballast de bateau
WO2008049179A1 (fr) * 2006-10-24 2008-05-02 Cirne Silva Andre Luiz Système de traitement de l'eau de ballast des navires, des plates-formes pétrolières en mer et de contenants, en général, à l'aide d'un procédé dans un réacteur électrochimique
WO2010037391A1 (fr) * 2008-09-30 2010-04-08 Adept Water Technologies A/S Dispositif et procédé d'élimination d'impuretés microbiennes dans des liquides à base d'eau ainsi qu'utilisation du dispositif
WO2010101841A2 (fr) * 2009-03-02 2010-09-10 Chester Sohn Appareil électrolytique de traitement d'eau de ballast et système de traitement utilisant ledit appareil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11267727B2 (en) * 2012-04-02 2022-03-08 The Bd Of Trustees Of The Leland Stanford Jr Univ Water sterilization devices and uses thereof
WO2016028231A1 (fr) * 2014-08-20 2016-02-25 Kalf Technology Pte Ltd Système de traitement d'eaux de ballast et procédé de traitement d'eaux de ballast
JP2016195978A (ja) * 2015-04-06 2016-11-24 大成建設株式会社 感染性排水の曝露防止装置
WO2019003380A1 (fr) * 2017-06-29 2019-01-03 パナソニックＩｐマネジメント株式会社 Dispositif de traitement d'eau de ballast

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