Marinco S.r.l. - Desalinators Industrial Civil Nautical Naval  Marinco s.r.l.

REVERSE OSMOSIS DEMRO DEIONIZERS FOR
PRODUCTION OF DEIONIZED ULTRAPURE WATER

For production of deionized water in all industrial sectors. BASIC PRINCIPLE
MARINCO deionizers series DEMRO operate on the reverse osmosis principle which consists of salts and organics removal from water by means of one or more semipermeable membranes. In order to function efficiently it is necessary to pressurize the water to deionize inside the membranes. Under the effect of pressure only pure water H20 and a very small quantity of salts pass through the membrane and this portion is said "permeate". The remaining part is a more concentrated water which contains all removed salts and all organics and it is said "concentrate", which is sent to drain. Our DEMRO are very simple to use and they require very low maintenance and man labour.
   

PRINCIPAL ADVANTAGE
Reverse osmosis technology allows to transtorm feed water up to 80-90% as deionized water. The discarded water is normally a concentrate water within the limits of the waste water maximum pollution standards so there is no requirement concerning water pollution.At the contrary using ion exchange resin deionizers the water produced during resins regeneration cannot be drained-off because it is much over the maximum levels acceptable for waste water drain. A further advantage is that the produced water by DEMRO systems is sterile because viruses and bacteria are much larger than the membrane pores and they cannot pass through.

 DEMRO 1MS 240
DEMRO 1MS 240. Nominal capacity 95 l/h.
   
DEMRO 2MS 440
DEMRO 2MS 440. Nominal capacity 570 l/h.		 AVAILABLES MEMBRANES
MARINCO units have one or more spiral wound membranes placed inside suitable vessels in stainless steel or reinforced polyester fibers depending on the models. Our membranes are in polyamide, which is the best up-to date polymer for membranes: depending on the needs we have available 2 types of spiral wound membranes: - normal BW membranes having 98% salt rejection for monovalent ions and 99% for polyvalent ions. Sofar, treating norma municipal water with about 300-400 mg/l TDS and 75% recovery rate the produced water has an approximate residusl salinity of 20-30 mgII as TDS.
- special LP-HR membranes having over 99.2% salts rejection for monovalent ions and over 99.5% for polyvalent ions. In this case residual salinity has only 8-10 mg/l TDS and even less. When lower TDS is required we install after our DEMRO units a mixed bed ion exchange resin deionizer which has only the function of a final polishing.
   
RAW WATER PRE-TREATMENT
Necessary to avoid calcium and magnesium scale on membrane surface. Required for feed water when there is not a water saftener before our DEMRO plant. Chemical pre-treatment is normally made just adding 10-12 ppm of our scale inhibitor Osmoguard by means of our dosing pump PD-1 supplied in extra price. Sometimes it is required to remove iron and/or silica orto remove turbidity or also remove colloidail particles adding a flocculation chemical. In certain cases we must disinfect raw water with ultraviolets or with chlorine and subsequent sodium bisulphite addition for chlorine removal. Pre-treatment must be studied case by case depending on water analysis.		 DEMRO 3MS 440
DEMRO 3MS 440. Nominal capacity 20,5 m3/day.
   
DEMRO 12MS 840
DEMRO 12MS 840. Nominal capacity 342 m3/day.		 PRODUCED WATER POST-TREATMENT
Sometimes it is required to produce ultrapure water with salinity lower than 5 ppm down to 0.1 ppm. In this case we install downstream a mixed polishing water to exchange deionizer that we propose case by case depending on customer needs. Sometimes we supply one of our UV sterilizers to be placed after pure water storage tank and when needed we also supply continuous recirculation system to maintain constant ultrapure water quality.


Model nominal capacity Energy
consuption
Kwh		 Overall
dimensions
cm.
l/h m3/day
1MS221 60 1,44 0,25 95x35x65
1MS240 95 2,28 0,50 110x40x65
2MS240 190 4,56 0,75 110x40x65
1MS440 285 6,84 2,2 110x60x125
2MS440 570 16,68 3 110x70x125
3MS440 854 20,50 4 350x70x140
4MS440 1.138 27,31 5 450x70x160
5MS440 1.423 34,16 5 550x70x170
6MS440 1.708 41,00 6 650x70x170
2MS840 2.375 57,00 10 300x90x170
3MS840 3.562 85,49 12 350x90x170
4MS840 4.750 114,00 14 450x100x170
5MS840 5.937 142,49 14 550x100x170
6MS840 7.125 171,00 16 650x110x180
10MS440 11.875 285,00 20 550x110x180
12MS440 14.250 342,00 26 650x110x180

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