Water
Sea water
With the worldwide population growth and the resultant increase in demand for fresh water for municipalities, agriculture and industry, there is a corresponding increase in the challenges for the need to assure global water demand with innovative technologies. This is because, whereas demand for fresh water is rising, there is a corresponding decline in its availability, and not only climate change but also environmental contamination are further exacerbating the worldwide water crisis. The trend is therefore increasingly moving in the direction of recovering drinking water from salt water. GEA is supporting this development with powerful decanters which enable procedures for sea water desalination to be designed with economic as well as ecological efficiency.
The three most important processes in sea water desalination are:
- RO – Reverse Osmosis (membrane process)
- MED – Multi-effect distillation
- MSF – Multi-stage flash
Evaporators are used in the MED- and MSF-processes. These operate under vacuum in order to achieve the best performance rate. In all cases, the vacuum is created using multi-stage steam jet vacuum pumps. Together with the corresponding condensers, these vacuum pumps are an integral part of the evaporation plant and are therefore becoming an increasing focus of attention.
Reverse osmosis is one of the most common methods for the desalination of sea water. In order to remove the insoluble substances in sea water, a flotation or ultrafiltration unit is generally installed upstream of the processing installations. This results in sedimented sludge and back-flush water, which have to be disposed of as a result of organic contamination.
Volume-reduced sludge lower disposal and transportation costs
The use of GEA decanters enables transportation and disposal costs to be efficiently reduced, as these machines reliably separate the sludge into solids and reusable water. Thanks to their high dewatering capacity, they are able to concentrate the solids up to 25 percent dry matter; this results in a considerable reduction in volume and correspondingly lower disposal costs.
Maximum reliability thanks to robust design
In order to permanently avoid corrosion even in conditions of extremely high chloride ion content in sea water, we only use high-quality materials for designing our decanters. All components which come into contact with product are therefore generally made from duplex/super duplex steel, and feature maximum reliability.
- Decanter for concentrating sediment and filtration back-flush water
- Reduction in the consumption of water
- Volume-reduced solids with high dry matter content
- Lower transportation and disposal costs
- Robust design due to use of corrosion-resistant materials
Other applications
Downloads
GEA Insights
Turning wastewater into value
GEA centrifuges enable wastewater reuse, resource recovery, and water security by turning biosolids into value in a world facing growing water scarcity.
Around the world in seven questions: New foods we’ll love
Last year was not a year of hyped-up headlines for alternative proteins. Perhaps that is precisely why it was an important year for food biotech, the biotechnology behind everyday foods and ingredients. While the sector worked through a difficult funding environment, approvals were still granted, pilot lines set up and new platforms tested in the background. In short: headlines are turning into infrastructure. Frederieke Reiners heads GEA’s New Food business. She and her team work at the intersection of biotechnology and industrial food production. In this interview, she takes us on a world tour of food biotech in seven questions.
How freeze-dried pet food raises the bar
Pets are family – and owners expect premium, transparent and sustainable nutrition. Freeze-drying, powered by GEA technology, helps pet food makers deliver.
