Sea Water Desalination in the World

SWRO less 2kWh/m³ NOW

Capacity	>100 000	m³/day
Recovery	45	%
Feed water TDS	<45 000	ppm
Total capital cost, including: Technological equipment	1100	$/m³day
Total capital cost, including: Technological equipment	800	$/m³day
Specified operational cost	0.5-0.6	$/m³
Specific consumption	>3	kW-h/m³

Cost Distribution Analysis

The maximum operational cost is for power consumption. Therefore the main priority of our investigations is to reduce the power consumption of the desalination complex.

Technological Scheme of the Advanced
Desalination Plant

Peculiarities and Advantages
of the Advanced Technology

Implementation of the original technology for water treatment prior to RO treatment provides reliable protection of RO membranes against mechanical damages.

Use of highly effective anti-scale inhibitors and special technique for washing down RO membranes provide increasing their life-time up to 5 years.

Implementation of highly effective hydraulic drives for pumps provides higher effective recuperating hydraulic energy from the RO exhaust brine thus reducing the power consumption rate for the process of desalination.

Recuperating hydraulic and osmotic energy of the exhaust brine considerably reduces the specific cost of desalinating sea water.

Application of non-standard design of special equipment, in particular: feed water boosters, intermediate filters, micro filters, RO modules reduce the cost of the process equipment by 30 to 40 % as compared to the regular market prices.

Considerably lower total cost.

Water Treatment

Two-stage filtration through inactive filters:
First stage - filtration through a granulated polystyrol filter with changing grain sizes from layer down to smaller ones along the depth of the filters. It allows to approach a high level of clearing (up to 95 %) and higher rate of filtering;
Second stage - filtration through inexpensive and easy-to-change cartridge micro filters with tiny porous of 5 microns in diameter.

"AMINAT" - is highly advanced sophisticated technology of Russian defense industry that allows to provide twice as lower cost for water treatment.

Osmotic Station of Desalination

Two-stage technology of desalinating sea water makes it possible practically completely removing dissolved solids out of sea water including bromides and boron:
- at the first stage a greater part of dissolved salts is separated and removed. At this stage highly selective thin-film composite RO membranes and high-pressure pumps are used;
- at the second stage RO membranes with lower selectivity and low pressure pumps are used.

Pressure vessels obtain original two-layer composition (metal - polymer) excluding corrosion of metal at actually low cost of manufacturing them.

Designing the RO units is based upon the original PC codes developed on the basis of the empirical data accumulated in the results of large maintenance and work experience. It guarantees that the results of design calculations would always coincide with practice.

Power Recuperation System

The recuperation system is intended for converting the residual energy of the exhaust brine into useful energy. The highly effective hydraulic and osmotic exchangers developed by the Russian scientists provide recuperation of up to 75 % of energy required for pressurizing the feed water without consuming energy for an outside power supply.

The shortened name (of the enterprise) -
SSC Keldysh Research Centre
Tel: 7-495-456-4608
Fax: 7-495-456-8228
E-mail: kerc@elnet.msk.ru

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