The plant described here is capable of producing, by a unique treatment, 40,000 litres of drinking water per hour, from seawater with 35.000 parts per million, Total Dissolved Solids at a seawater temperature od 10°C. The daily production will be 960 Cubic Metres. The water produced will be characterised by a residual salinity less then 186 ppm TDS. Large Organic molecular substances, such as viruses, bacteria and pyrogen agents will have been removed.

To meet your production requirements we have individualized the following system as a base unit, which can be multiplied together when a greater quantity of water is required to be produced.

The choice of multiple plants is not casual.

In this manner we try to avoid every possible system stop that could happen if I there was installed only a single high pressure pumping group. 10 Base units in tandem can produce  over 9.5  million litres per hour and lose no more than 10% of capacity for maintenance requirements or failure.

The advantages of this solution are indisputable. It is possible, for example,to carry out any kind of maintenance procedure such as membrane substitution chemical cleaning, oil change on High pressure pump etc without stopping production. It is also possible to run multiple units in tandem when full production is required, yet shut them down one at a time to suit production needs, in addition, it is possible to start the units up one at a time and therefore save on the energy required to start a much bigger system. Where it is unsure of the ultimate requirements for example a waterside complex, 1 unit is installed and added to as and when needed.

The process:

The sea water is taken in by the low pressure boost pump, which pumps it through a fine filtering group, that will get rid of all the larger particles in suspension down to 5 micron; this group will be timed self washing. The water is then passed through a UV sterilizer group that will kill any bacteria before they arrive at the membranes, which could be damaged by their presence.

The following phase will bring the water into a multi cartridge filtering group that will detain the particles in suspension down to 5 micron to avoid the immediate obstruction of the Reverse Osmosis  membranes.

In the next step, a dosing pump will inject an anti flocculent solution to avoid the precipitation of the elements, dissolved in the water, on the membranes.

The high pressure pump will push the seawater at 55- 60 bar into the pressure vessels and around the osmotic membranes. Under this pressure the Reverse osmosis will take place.

Through the pressure effects a small proportion of pure water will pass through the membranes (18-20%). This will be called "permeated water"  and will be drinking water.

The remaining portion, "the concentrated water", will be dumped back to the sea.

The extraction of only this small percentage keeps the membranes self cleaning due to a high overall flow rate.

N° 1 Low pressure boost pump

 N° 1 UV steriliser

 N° 1 Auto backwash sand filter

 N° 1 Multi cartridge 5 micron filter

 N° 1 DOS- SYSTEM – Anti flocculent dosing system

 N° 1 Chemical washing system

 N° 1 AISI 316 High Pressure pump W15 ceramic pistons with 2 AISI 316 pump heads – Flow rate 9 m3/h each.

 N° 1 R.O. system composed of N° 3 osmotic membranes

 N° 1 fiber glass 8"X120" pressure vessels.

 N° 6 Low pressure gauge meter

 N° 1 Conductivity meter on the production line

N° 2 Flow meter

 N° 1 Thermometer

 N° 1 Painted steel frame for vessel

 N° 1 Painted steel frame for high pressure pump

 N° 1 AISI 304 frame for pre treatment units

N° 1 Electrical switchboard PLC controlled, assembled following CEI standards with IP 55 protection.

The low pressure pump installed will have the following characteristics:

- N° 1 Glass fibre 1200 x 2202 high flow rate double expansion

- N° 1 Automatic backwash valve AUTOTROL or SIATA

Aisi 316 multi cartridge 5 micron filter FA44000-5-H6-4

Feed flow rate m3/h 44

- N° 1 Aisi 316 316 Stainless Steel Multi cartridge filter Mod. H6-4

- N° 6 Cartridges 40" 5 Micron

Permatreat 191 antiflocculent is used for R.O. system with a feed flow rate greater than 130 m3/day.

Permatreat 191 prevents the calcium carbonate, calcium sulphate, barium sulphate, iron and silica precipitation (up to 165 ppm of silica in the concentrated water) Permatreat 191 reduces the frequency of membrane chemical washing.

It is compatibile with all the kind of membranes, and approved by all the membrane producers.

Approved by the Drinking Water Inspectorate (DWI - UK) and by the UK Department of the Environment for using the product in Reverse Osmosis system for the production of drinking water.

- N° 1 PERMADOS ID.B 03-03 Pump

- N° 1 Dosing station Dos-2 120 Lt

- N° 1 Motorized mixer Mod. AF 1/8/4

- N° 1 Level indicator for dosing pump

- N° 1 Level probe

The level probe only supply the signal of the minimum level of the dosing reservoir.

The consumption of Permatreat 191 is of 4 gr per m3

Every 3 years of continuous operation it is necessary to perform a membrane washing using the specific cleansing.

The washing station that will be installed will be the CLEANSYSTEM 1 - 8" that includes the following components:

N°1 325 Lt container

N° 1 Manual mixer PERMAMIX

N° 1 PERMAWASH CHI 12-30 3 x 380 V pump

N° 1 Flow meter D63 DN50 2" 10000 Lt/h

N° 1 Gauge meter D63 G1/4" 0-6 bar INOX

N° 1 Gauge meter D63 G1/4" 0-10 bar INOX

N° 1 PERMAPROGRAM B electric switchboard

The electric switchboard managed by a PLC the best functioning of the plant, checking the pressures, the flow rates , the conductivity, and all the automatisms. The electrical switchboard will be assembled by CEI standard, insulation IP 55.

Components:

- General switch with door closing

- Transformer 380/24 Volt for auxiliaries

- Hour counter

- Thermal overloads for motors, and pumps

- Acoustic alarm

- Volt meter

- Ampere meter

- Emergency stop

- PLC

The system is assembled and tested in our factory on a painted steel framework, in order to avoid every kind of installation problems.

Fittings and valves for high pressure line are entirely made of AISI 316 Stainless Steel. The low pressure lines are made of PVC.

The overall dimension are to be defined as for transportation requirements.

The unit is supplied with:

- Gauge meter on sand filter inlet and outlet

- Gauge meter on the multi cartridge inlet and outlet

- Gauge meter on the concentrated water line

- Flow meter on the feed water line of the produced water

- Flow meter on the general line of produced water

- Gauge meter with minimum and maximum pressure alarms

- Produced water conductivity probe, operating a solenoid valve for the dump of the non conforming water. With this system the drinking water will be sent to the storage tank only if it is conforming to the prefixed standards without any operator check

- Thermometer

- PH meter

The system will be equipped with detailed technical operator and maintenance manuals (X2) in English.

HP High Pressure Srl supply 1 YEAR warranty on the complete plants.

3 YEARS on the AISI 316 head of the pump, produced by us.

The customer is welcome to see the  testing in our factory before the shipping.

*iva to be excluded for foreign supply

Operating costs

If the plant is used 24h a day , the consumption of PERMATREAT 191 is 228 grams a day. If the plant is used 365 days a year the consumption will be about 84 Kg, with a cost per year of € 1,344.00