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Desalination Plants

A natural water cycle occurs on the earth's surface whereby seawater is evaporated by solar energy and turned into rain to make rivers, which return the water to the sea.
There are areas, however, where it is difficult for this water cycle to occur and inhabitants suffer continually from a shortage of fresh water; for example the Middle East, isolated islands, and areas where no big rivers flow nearby.
Hitachi Zosen group contribute to societies and people living in such areas by constructing seawater desalination plants to create artificial water cycles.

Hybrid (MSF・RO) desalination plant (Qatar)
Capacity : MSF 347,770m3/day , RO 272,760m3/day

Major Products

RO (Reverse Osmosis) Method

The reverse osmosis method is a process for producing fresh water by supplying seawater to a semipermeable membrane at higher pressure than osmotic pressure. Unlike the evaporation method, it does not require steam and can produce fresh water with a high energy efficiency. In the Middle East, where the cost for energy is relatively low, the evaporation method prevails. However, RO is now expanding its share of the worldwide market, helped along by improvements in technology and membrane performance. At present, more than one half of desalination plants use the reverse osmosis method.
We have been developing this process with its own technology since the 1970s and have many records of delivery to mainly isolated islands in Okinawa.
Recently, we have constructed a large RO plant in Qatar and the plant has produced approx. 270,000 m3 of water per day.

RO desalination plant (Japan)
Completion : 1986
Capacity : 240m3/day×1unit

Hitachi Zosen Group - Osmoflo Holdings Pty Ltd

Our Australian subsidiary, Osmoflo is a global desalination and water treatment company. Located across Australia, the Middle East, Oman and India. Osmoflo offers international coverage of its world class capabilities in delivering water treatment solutions. Osmoflo has over 450 plants located around the world at remote mine sites, oil & gas fields, power stations, city breweries, townships and coal seam gas fields - wherever there's a need for drinking, process, high purity or recycled water.

RO desalination plant (Oman)
Capacity : 56,826m3/day

Emergency Water Service

Hitachi Zosen and our subsidiary, Osmoflo have extensive capabilities in delivering a robust rental desalination and wastewater solution for temporary and long term use.
We have supplied over 50 rental service for emergency water needs occurred by disaster and droughts, temporary water demands for plant constructions, and back up water supply.

With a range of our asset capacity, standardized assets/systems will be selected, customized and modulized to fit in containers to meet client requirement as an “easy and quick” solution.
The containerised plants enable us to start up plants in short periods, as the plants are ready to plug-and-play right after delivered to site.

Fast Track Emergency Water Solution – 7,000/14,000/21,000 m3/day

Hitachi Zosen and our subsidiary, Osmoflo have fast track emergency containerized seawater desalination plants available to provide 7,000m3/day, 14,000m3/day, and 21,000m3/day. These plants can be mobilized to client’s sites anywhere in the world in a short period and proposed sales or rental.

MSF (Multi Stage Flash) Method

The multi stage flash method is an evaporation process for desalination in which heated seawater is evaporated in a vacuum evaporator and the resulting vapor is condensed to produce fresh water. Recovery of the latent heat of condensed vapor increases the heat efficiency. In the Middle East most desalination plants are constructed with power generation facilities. Therefore many large MSF desalination plants are operated using the excess steam from the power generating facility. We have built 17 plants and 49 desalination units since 1978 (total water production: 1,664,997m3/day).

MSF desalination plant (Qatar)
Capacity : 163,656m3/day

MED (Multiple Effect Distillation) Method

The multiple effect distillation method is an evaporation process for desalination that efficiently produces fresh water through multiple-effect evaporation. The heat source for the first effect is steam from a power generating or other facility, while the heat source for the second and later effect is the steam generated in the previous effect. Evaporation is repeated in both effects. MED can be categorized into three types according to the shape of the heat transfer area: the Vertical Tube Evaporator (VTE), the Horizontal Tube Evaporator (HTE), and the Multi-Effect Plate (MEP). We first entered into the desalination market with a VTE multi-effect desalination plant in the 1960s. Thereafter we started to develop the HTE in 2001 and have completed various demonstration tests. The first fully operational system commenced operations in July 2011.

MED desalination plant (Japan)
Completion : 2011
Capacity : 1,300m3/day×1unit
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