Recirculating Aquaculture System
VR
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Zhongshan eWater Aquaculture Equipment Technology Limited has set up a team which is mainly engaged in product development. Thanks to their efforts, we have successfully developed recirculating aquaculture system and aquaculture equipment and planned to sell it to the overseas markets. High-end technologies are adopted to manufacture the product.When the product is manufactured and used in the field(s) of Other Aquaculture Equipment, its stability and advantages can be fully played out. Zhongshan eWater Aquaculture Equipment Technology Limited will keep focusing on customers' needs and keep up with the industry trends so as to develop the products that better satisfy customers. Our wish is to cover a wide range of global markets and win wider recognition from customers all over the world.

Place of Origin:Guangdong, ChinaBrand Name:eWater, eWater
Model Number:EW-RASCommodidty:Recirculating Aaquaculture System
Model:RAS-GENMain Equipment:Biofilter,protein skimmer,drum filter

RASDescription
MaineWaterRASprocessesandtheequipmentnecessaryAseriesoftreatmentprocessesisutilizedtomaintainwaterqualityinintensivefishfarmingoperations.Thesestepsareoftendoneinorderorsometimesintandem.Afterleavingthevesselholdingfishthewaterisfirsttreatedforsolidsbeforeenteringabiofiltertoconvertammonia,nextdegassingandoxygenationoccur,oftenfollowedbyheating/coolingandsterilization.Eachoftheseprocessescanbecompletedbyusingavarietyofdifferentmethodsandequipment,butregardlessallmusttakeplacetoensureahealthyenvironmentthatmaximizesfishgrowthandhealth. 

ProcessEquipmentnecessaryBiolfiltrationdenitrifyingbiofilter,MBBRprocessSolidsremovaldrumfilter,sandfilter,proteinskimmerReoxgenatingoxygenconeorlowpressureoxygenatingdevicePHcontroldegassingdeviceTemperaturecontrolsubmergedheaters,heatpumps,chillers,andheatexchangersBiosecurityUVsterilizer,ozonegenerator
Biofiltration
AllRASreliesonbiofiltrationtoconvertammonia(NH4+andNH3)excretedbythefishintonitrate.Nitrifyingbacteriaarechemoautotrophsthatconvertammoniaintonitritethennitrate.Abiofilterprovidesasubstrateforthebacterialcommunity,whichresultsinthickbiofilmgrowingwithinthefilter.Waterispumpedthroughthefilter,andammoniaisutilizedbythebacteriaforenergy.Nitrateislesstoxicthanammonia(>100mg/L),andcanberemovedbyadenitrifyingbiofilterorbywaterreplacement.
SolidsFiltrationInadditiontotreatingtheliquidwasteexcretedbyfishthesolidwastemustalsobetreated,thisisdonebyconcentratingandflushingthesolidsoutofthesystem.Removingsolidsreducesbacteriagrowth,oxygendemand,andtheproliferationofdisease.TypicalRASsolidsremovalinvolvesasandfilterorparticlefilter.AnothercommonmethodistheuseofamechanicaldrumfilterInordertoremoveextremelyfineparticlesorcolloidalsolidsaproteinfractionatormaybeusedwithorwithouttheadditionofozone(O3).
PHControl
InallRASpHmustbecarefullymonitoredandcontrolled.ThefirststepofnitrificationinthebiofilterconsumesalkalinityandlowersthepHofthesystem.KeepingthepHinasuitablerangeiscrucialtomaintainthehealthofboththefishandbiofilter.pHistypicallycontrolledbytheadditionofalkalinityintheformoflime(CaCO3)orsodiumhydroxide(NaOH).pHcanalsobecontrolledbydegassingCO2inapackedcolumnorwithanaerator,thisisnecessaryinintensivesystemsespeciallywhereoxygenationinsteadofaerationisusedintankstomaintainO2levels.
TemperaturecontrolAllfishspecieshaveapreferredtemperatureaboveandbelowwhichthatfishwillexperiencenegativehealtheffectsandeventuallydeath.Temperaturealsoplaysanimportantroleindissolvedoxygen(DO)concentrations,withhigherwatertemperatureshavinglowervaluesforDOsaturation.Temperatureiscontrolledthroughtheuseofsubmergedheaters,heatpumps,chillers,andheatexchangers.[13]Allfourmaybeusedtokeepasystemoperatingattheoptimaltemperatureformaximizingfishproduction.
Biosecurity
DiseaseoutbreaksoccurmorereadilywhendealingwiththehighfishstockingdensitiestypicallyemployedinintensiveRAS.Outbreakscanbereducedbyoperatingmultipleindependentsystemswiththesamebuildingandisolatingwatertowatercontactbetweensystemsbycleaningequipmentandpersonnelthatmovebetweensystems.AlsotheuseofaUltraViolet(UV)orozonewatertreatmentsystemreducesthenumberoffreefloatingvirusandbacteriainthesystemwater.Thesetreatmentsystemsreducethediseaseloadingthatoccursonstressedfishandthusreducethechanceofanoutbreak.

DetailsImages
SuccessfulCasesPabdaCatfish(OmpokPabda)

●CulturingCycleTime:90–110Dto40-55gramssize

forharvesting

●Biomass:60kilograms/m3atharvesting ●Temp:15–30℃,22–27℃preferred

RASusedtogrow  americaneel

●CulturingCycleTime:150Dto150gramssizefrom

50-gramfingerlings

●Biomass:60kilograms/m3atharvesting●Temp:26-30℃


Ouradvantage

▶Reducedwaterrequirementsascomparedtoracewayorpondaquaculturesystems. 

▶Reducedlandneedsduetothehighstockingdensity.▶Siteselectionflexibilityandindependencefromalarge,cleanwatersource.▶Reductioninwastewatereffluentvolume.

▶Increasedbiosecurityandeaseintreatingdiseaseoutbreaks.▶Abilitytocloselymonitorandcontrolenvironmentalconditionstomaximizeproductionefficiency.Similarly,independencefromweatherandvariableenvironmentalconditions. 


CompanyProfile

Aboutewater
ZhongshaneWaterAquacultureEquipmentTechnologyLimitedisaprofessionalcompanyengagedindesign, productionandsalesofRecirculatingAquaculture Systemaswellasaquacultureequipment.Ewateris focusedonthedevelopmentandmanufacturingof industrialrecirculatingaquaculturesystemsolutions,anditsproductdesignandproduction,includingdrum filters,proteinskimmers,biologicalfilters,aeration equipment,disinfectionequipment,heatpumpsand waterqualitymonitorequipment.
Weworkwithtop-levelaquacultureresearchinstitutes andexpertstodevelopbestsolutionsforourcustomers inaquacultrureindustry.Ourengineeringteamis committedtodevelopbestpracticesforeachequipmentandRASbasedoncustomers'needs.Wecontinuetobereliableandhonestinwhatwedoandhowweact.
Ourmissionistoimprovesustainabilityandprofitabilityfor customers,andbeavaluablepartnerforcustomers' long-termbusiness.
Certifications
ExhibitionExhibitioninNanningCityGuangxiProvince,ChinaExhibitioninZhanjiangCityGuangdongProvince,ChinaInstallationServices

Ifneeded,wecanprovideon-siteinstallationservices.

GreatServiceisOurMisson
●Consultingserviceavailableandcustomdesignsarewelcomed!●Weofferpracticalsolutions,premiumqualityproductsalongsidecompetitivepricesandpromptdelivery.●Alltheequipmentareguaranteedfor2yearsandlife-timewarrantyexceptforthewearingparts.●Supportonsiteinstallationandsendingengineerfordebuggingondemands.●After-salesserviceandcontent:Ifthequalityproblemsoccur;eventheequipmentlosetheabilityofworking,wewill repairorreplacethemfreeofchargeduringthewarrantyperiod.Theproductislife-longmaintenanceandwewill 

provideall-roundservicesexceptforfactorssuchasartificialdamageorirresistibleforce.


On-siteinstallationservicesin UzbekistanOn-siteinstallationservicesin Bangladesh

CustomerPhotosYouarewelcometovisitourfactory.
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Our mission is to improve sustainability and profitability for customers, and be a valuable partner for customers’ long-term business.

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They are now widely exporting to 200 countries.

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