WATER TREATMENT PLANTS REVERSE OSMOSIS - MOBILE … · SEA WATER DESALINATION UNITS Overview Construction The Reverse osmosis Mobile Units, Mod. RO-BW, are used in desalinization

WATER TREATMENT PLANTSSEA WATER

REVERSE OSMOSIS - MOBILE SYSTEM

SEA WATER DESALINATION UNITSOverview

Construction

The Reverse osmosis Mobile Units, Mod. RO-BW, are used in desalinization for brackish water are used for drinking or irrigation water production or for industrial use (thermal power station, food, pharmaceutics, electronics industry, etc.).The desalinization units operate, efficiently, in a continuous way, therefore the necessary productive capacity is given from the daily need of permeate divided by the 24 hours that the unit is operating. It is advisable to have an accumulation tank of the produced permeate.The RO BW units are supplied with a sequestrant agent dosage group that prevents the precipitation of incrusting salts on the membranes. In case of request or need treatment units can be equipped with ultrafiltration membrane pre-treatment (UF).In order to obtain drinking water from the permeate, a post-treatment must be introduced, made up by a mineral salt dosage unit to re-es-tablish the pH, hardness and alkalinity values, and by a final disinfection. The use of a station for the periodic cleaning of the membranes is always advisable.

DESIGN DATA• Feed water temperature 5-30 °C• Feed water TDS up to 3000 mg/l• Pre-feed pressure 3 bar• Permeate back pressure 0.5 bar• Power supply 380/50 V/Hz• Average recovery 70 %

OPERATIONAL LIMITSIn order to guarantee the long lasting performance of the membranes, the intake water of the reverse osmosis unit must respect the following limits:• SDI < 3• Iron < 0,05 mg/l• Manganese < 0,05 mg/l• Chlorine and oxidant 0,1 mg/l• Bacterial and organic substances concentration following

the requirements of a drinking water• Absence of oils, sulphides and polluting substances in general

• Media filter• Sequestrant dosage station, complete with PE tank, the me-

tering pump and the level sensor.• Cartridge filter (wire-wound cartridges and 5 micron filtration

level).• Centrifugal pump, vertical multistage type in Stainless Steel.• Reverse osmosis rack composed by high production reverse

osmosis modules for brackish water. The modules are housed in PRFV containment vessels.

• Hydraulic lines, in Duplex for high pressure, in PVC for low pressure.

• Pressure regulator valve in Stainless Steel.• Circulation flow-rate valve in Stainless Steel

(where requested).• Control instruments:

• Pressure gauges • Flow transmitter (permeate, concentrate, circulation (where requested)) • Pressure transmitter control • Conductivity meter • Level control transmitter.

• Control panel and automation of the RO BW unit.• Membranes cleaning station (CIP).• Preassembly on skid, in AISI 304.• Hydraulic and electrical connections inside the skid of the

permeation group.

Technical management andmaintenance remote assistanceThe operations and maintenance departments of STA are able to provide its customers with a qualified global service, aimed at complying with environmental regulations and the optimization of operating costs.A system that allows to operate, from remote, directly inside the network of the client, to test the functioning of the main equipments and eventually modify the software. This opera-tion works through a secure VPN that allows a direct control over the industrial web in a secured way. The program of su-pervision can be displayed on the touch screen positioned on the electric board or on a PC. The electric board is designed for an internet connection through which the program can beviewed and supervised and enabled on any laptop or on su-pervision stations of STA.

Water treatment plants

STA’s plants:

STA’s technical staff designs, and manufactures treatment systems by selecting, and sizing them after a personalized study based on your necessities.Our range of products is addressed to very different customers, because “water” is involved in every act of human life, and many productive activities.

Filtration systemsSofteringDemineralizationDesalinationReverse Osmosis

STA provides integrated solutions in water treatment with innovative processes and technology developed according to environmental and normative standards.Our operating staff (About 130 operators) is composed by a qualified team of engineers and technical operators with a long-lasting expe-rience in the field.STA offers preliminary studies, design, construction, and management of water treatment plants and wastewater treatment plants.Planning, design and realization of water treatment plants for the production of drinking water and water for industrial and technological uses as well as the desalination of brackish and sea water.

REVERSE OSMOSIS

OverviewReverse osmosis represents the most convenient and the safest technique for desalinization of different kinds of water.This treatment is replacing other technologies for water desalinization, thanks to the excellent combination between quality results and low operating costs. Reverse osmosis also guarantees low energy consumption and reasonable expenditure of chemical products.Furthermore, the waste water parameters fall within the sewage limits, therefore resizing more and more the problem of disposal of eluates (for example for softeners and ion exchange resin demineralization units).

• Chlorine or oxidizing agents in general (except oxygen)• Organic substances, sulphides, oils.

How it worksReverse Osmosis is the process used when a saline solution comes into contact with a membrane permeable to water (and not to dissolved salts) at a pressure exceeding the osmotic pressure of the solution itself. The passage from water, poor in salts (permeate), occurs through the membrane, whereas on the outside of the membrane a waste water rich in salts (brine) is obtained.The Reverse Osmosis is a process of physical type, which does not require the use of regenerating chemicals. Reverse Osmosis technology offers total guarantee thanks to its versatility characteristics, performance excellence and ease of use. Over the years have multiplied the types of membranes available, up to the latest low energy, and their quality and reliability is well established also for those specifically designed for targeted applications.Here below is a list of the main parameters used in the planning stage of Reverse Osmosis and desalinization processes:

The comprehension of the water characteristics must be added to these essential factors in particular, in order to improve a possible pre-treatment, it is fundamental to verify the presence of:• Suspended solids• Polluting metals, such as iron and manganese• Bacterial concentration

• Salinity of the water to be treated• Temperature of the water to be treated• Recovery factor

• pH• SDI

• Hardness• Alkalinity

Pre-TreatmentBefore the Reverse Osmosis section, it is important to determine the most suitable “pre-treatment” based on the characteristics of the water to be treated in order to guarantee the greater operating continuity of the system and reduce washing frequency. A correct pre-treatment prevents relatively rapid lodgement of the membrane due to grime and/or physi-cal impurities, lodgement due to precipitation of encrusting salts and/or metals, bacterial proliferation, contact with oxidising agents.

Main ApplicationsWhere is require high quality water, chemical and bacteriological, with the advantage, compared to the demineralization, not to have problems related to the discharges of regeneration and handling of chemical prod-ucts:• Desalination-production of drinking water from brackish waters• Production of pure and ultrapure water• Refining and softening of water• Irrigation use• Food industry• Cosmetics and pharmaceutical industry• Textile industry• Steel industry• In water reuse applications, and wherever you need specific water.• To remove arsenic, nitrates and other pollutants.

Flow rate

Model Feeding Permeate

m3/h m3/h

500 1,25 0,5

1.000 2,5 1,0

3.000 6,6 3,0

5.000 11,1 5,0

10.000 22,2 10,0

20.000 44,5 20,0

35.000 77,8 35,0

50.000 111,0 50,0

Reverse Osmosis - Sea Water MOBILE UNITS

Technical Data

STA’s containerized units are available in a variety of configurations to cover flow requirements from 0,5 to 50 m3/h, with salinity levels up to 38000 ppm of TDS.The STA Reverse Osmosis systems are supplied in container units (sized 20’ and 40’) already assembled and electrically and hydraulically tested and ready to use.

(flow rates above 50 m3/h available on request)

TreaTmenTs planTs of primary and

drinking waTers

Creditsa2a CiClo idriCo spa Brescia (BS), aBBanoa spa Cagliari (CA), aCegas-aps-amga spa Trieste (TS), aCQUe Veronesi sCarl Verona (VR), aCQUe ViCenTine spa Vicenza (VI), aeroporTo Valerio CaTUllo Verona, alleVamenTi impero Marcaria (MN), alsTom ferroViaria spa Savigliano (CN), amag spa Alessandria (AL), angelo CroCe CaseifiCio Casalpusterlengo (LO), apora soC. Coop. agr. Ficarolo (RO), alTo TreVigiano serViZi srl Montebelluna (TV), arBeTTi moTors srl Verona (VR); asep spa Porto Mantovano (MN), aTV – aZienda TrasporTi Verona Verona, aUTodemoliZioni riZZi Treviglio (BG), aZ. agr. BrUTTi massimo Zevio (VR), aZ. agr. Campana S. Margherita di Peveragno (CN), aZ. agr. dosso pUel Roverè Veronese (VR), aZ. agr. soriani roBerTo Quistello (MN), aZienda gardesana serViZi spa Peschiera del Garda (VR), Bilfinger sielV faCiliTy managemenT, BaUli spa Orsago (TV), Bonomi spa Roverè (VR), C.B.L. SRL Costa Volpino (BG), CafC spa Udine (UD), CanTina gonZaga Gonzaga (MN), Cap Holding spa Milano (MI), Casearia CasTelli Carbonara al Ticino (RE), CaseifiCio aCHille Velo Veronese (VR), CaseifiCio CanTarelli rag. giUseppe Acquanegra Sul Chiese (MN), CaseifiCio CroCe Pegognaga (MN), CaseifiCio di primiero Mezzano di Primiero (TN), CaseifiCio gHideTTi Isola Rizza (VR), CaseifiCio pini Sanguinetto (VR), CaseifiCio sangioVanni Palazzo Pignano (CR), CaseifiCio soCiale Tre Case Villanova Sull’ Arda (PC), CaseifiCio ZanoleTTi Ghedi (BS), CaseifiCio ZerBaTo Vestevanova (VR), CenTro VeneTo serViZi spa Monselice (PD), CoCa-Cola HBC iTalia Nogara (VR), CenTro CommerCiale il diamanTe Cattolica (RN), ColomBo seVero & C. Borgo S. Giovanni (LO), ConsorZio laTTerie Virgilio Porto Mantovano (MN), ConsorZio ZiU Udine (UD), Coop. agr. 8 marZo Sant’ Ambrogio V. 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s.T.a.Società Trattamento Acque S.r.l.

S.S. 420 SabbionetanaLoc. Vicomoscano 26041 Casalmaggiore (CR)Tel. +39 0375 200183 Fax. +39 0375 205673

Loc. Dossello27011 Belgioioso (PV)Tel. e Fax. +39 0382 971172

Warehouse and Showroom Via Vespucci, 5Z.I. Valdaro46100 Mantova (MN)

Via Giordano di Capi, 28-30Z.I. Valdaro - 46100 MantovaTel. +39 0376 372604Fax. +39 0376 270180

www.stacque.com

Certified quality system according to the standards UNI EN ISO 9001 and ISO 14001

SOA certified according to the Presidential decree 207/2010

BS OHSAS 18001

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drinking waTers


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BS OHSAS 18001



drinking waTers


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BS OHSAS 18001



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www.stacque.com



BS OHSAS 18001


Loc. Codevigo 35020 Codevigo (PD)Tel. e fax 049 5817757E-mail: [email protected]


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WATER TREATMENT PLANTS REVERSE OSMOSIS - MOBILE … · SEA WATER DESALINATION UNITS Overview Construction The Reverse osmosis Mobile Units, Mod. RO-BW, are used in desalinization

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