Ballast Water Treatment System Installation - Navalista LLC

How does a Ballast Water Treatment System (BWTS) work? ... Invasive Aquatic Species in ship's ballast water is one of the biggest problems faced by the shipping ... SIGNIN yourpersonalaccountinNAVALISTACorp. Login BallastWaterTreatmentSystemInstallation HowdoesaBallastWaterTreatmentSystem(BWTS) work?      InvasiveAquaticSpeciesinship’sballastwaterisoneofthe biggest problemsfacedbytheshipping industry.Posingagreatthreattothemarineecosystem,theseaquaticspecieshasledtoanincrease inbio-invasionatanalarmingrate.UnderIMO’s“InternationalConventionfortheControland ManagementofShip’sBallastWaterandSediments”,implementationofballastwatermanagementplanand ballastwatertreatmentsystemonboardshipshasthusbecomeimportant. ●  ●  ●        Inordertoensuretheirshipscomplywiththerulesandregulationsset byIMOregardingBallast WaterManagement,severalshippingoperatorshavestartedimplementingballastwatertreatmentsystems ontheirships. ●  ●  ●        Avarietyoftechnologiesareavailableinthemarketfortreating ballastwateronships.However, constraintssuchasavailabilityofspace,costofimplementation,andlevelofenvironmental friendlinessplayanimportantroleinusageofaparticulartypeofballastwatertreatment system. ●  ●  ●        Anumberoffactorsaretakenintoaccountforchoosingaballastwater treatmentsystemforaship.Someofthemainfactorstakenintoconsiderationare–    ●   Effectivenessonballastwaterorganisms    ●   Environment-friendliness    ●   Safetyofthecrew    ●   Costeffectiveness    ●   Easeofinstallationandoperation    ●   Spaceavailabilityonboard ThemaintypesofongoingprojectsforballastwatertreatmentbyNavalistaareFullFlow Electrolytic Systemand Ultra-Violet(UV)TreatmentMethod.Ourcompanyrecommends(butisnotlimitedto)theuseofthese systemsforballastwatertreatment. ThemostpopularBWTStypesthatNAVALISTAdevelops installationdesignfor: ...let'stalkaboutFullFlowElectrolyticSystem!      WhatisabundantlyclearisthatFilterUVsystemscannotoperatein challengingwaterswithoutimposingconstraintsonshipcargooperations.SuchUVBWTS,cannotapplya backupplantomanipulatethewaterqualitytomeetitsSDLs.ThismeansthatifthetargetedUVIis notmetfollowingthemaximumallowedflowreduction-ortheUVTmentionedinsystemTypeApprovalis notmet-thenthesystemcontrolcannotaccommodatesuchachallengeandwillshut-down. Electro-chlorinationsystemsdonothavethismajordisadvantage.Thesesystemscanincreasethe uptakewatersalinitybyaddingseawaterorincreasingthewatertemperaturewithaheaterinthe caseofside-streamelectrolysisBWTS.Modernsystemsachievestheformerwiththeuseof intelligentcontrolsandwithouttheneedofheating,sinceitcanworkdownto–20Cofelectrolyte feedtemperature. ●  ●  ●   BALLASTING      Duringballasting,thewatergoesthroughthefilter,whereorganisms andsediment(withadiameterlargerthan40microns)areseparatedandfurtherdischarged overboard. ●  ●  ●        ThefilteredwaterenterstheElectrolyticCell.Fromthechloridesof thewater,freechlorineisproducedthroughtheelectrolysisprocessataverylowconcentration (around4-6mg/L).Thetreatedwaterthen,enterstheballasttanks. DE-BALLASTING      ItisacommonpracticeforBulkCarrierstousedifferentballasting and de-ballastingrates.Thisiscausedbycargoterminalloadingandunloading rates.Itisfrequentlythecasethatde-ballastingneedstobeconductedtwiceas fastasballasting.AgoodexampleisAustraliawherede-ballastingmusttake placeinlessthan18hrsforaCapesizeBulkCarrier(>50,000m3ofballast water). ●  ●  ●        Duringde-ballasting,thesystemwillonlymonitortheresidualoxidants andwillfurtherinterveneifnecessary.Themainstagesofthesystem(filtrationanddisinfection) arebypassed. ●  ●  ●        ATotalResidualOxidants(TRO)sensorsamplestheresidualchlorineat thedischargeline.Ifitisgreaterthan0.1mg/L,adosingpumpisoperatedforthedosageof neutralizingagent(SodiumBisulfite).Successfulneutralizationoffreechlorineisconfirmedbya secondTROsensor,installedatthefarendpointoftheballastdischargeline. ⚊  ⚊  ⚊   ...let'stalkaboutUltra-Violet(UV)TreatmentMethod!      UltravioletballastwatertreatmentmethodconsistsofUVlampswhich surroundachamberthroughwhichtheballastwaterisallowedtopass.TheUVlamps(Amalgamlamps) produceultravioletrayswhichactsontheDNAoftheorganismsandmakethemharmlessandprevent theirreproduction.Thismethodhasbeensuccessfullyusedgloballyforwaterfiltrationpurposeand iseffectiveagainstabroadrangeoforganisms. ●  ●  ●        Thespeciallightsterilizesthewaterintheballastwatertanks.In theUVCrange,awavelengthof254nanometersdestroystheDNAofthebacteriaandpathogensmaking theminactive,andthuspreventsthemfromreproducing. ●  ●  ●        UVdisinfectioniseffectiveatwavelengthsfrom200nmto300nm.The UVCradiationemittedhasastrongbactericidaleffect.ItisabsorbedbytheDNA,destroysits structureandinactivateslivingcells.Microorganismssuchasviruses,bacteria,yeastsandfungiare renderedharmlesswithinsecondsbyUVradiation.Iftheirradianceishighenough,UVdisinfectionis areliableandenvironmentally-friendlymethodeliminatingtheneedforchemicals.Moreover,the microorganismscannotbecomeresistanttoUVradiation.      ThestandardsforcleanballastwaterdefinedbytheIMO,helps stemthe introductionofinvasiveaquaticorganisms.Withthe2017ratificationofIMOregulations, environmentallycompatibletreatmentsystemsforballastwaterwillsoonbemandatoryonallmaritime vesselsoperatingininternationalwatersthatdischargeballastwater. ●  ●  ●        YouradvantageswithUVlight    ●   Fast,efficientandeconomicaltechnology    ●   Simpletohandlewithlowmaintenance    ●   Eco-friendly,safeandchemicalfreeprocess    ●   Notransport,storageandhandlingofdangerousgoods    ●   Noenvironmentalimpact Navalistahasdevelopedalargenumberofprojectsusing thesetechnologiesandhasexcellentreviewsfromourpartners.Wearealsoreadytocarryoutany projectsonotherballastwatertreatmenttechnologies. examples obviousadvantages