Seawater Desalination refers to a multitude of methods to remove a percentage of salt along with other minerals from saline seawater. The desalination of seawater has an extensive history of use worldwide by countries where there is a shortage of fresh drinking water. A great way to provide seawater for desalination is by using Horizontal Directional Drilled Wells under the soil of the sea. The sand on the seabed is used as a first filter, so the desalination of seawater after intake doesn’t cost as much time and money as with other forms of intake.
Desalination of seawater: the possibilities
Desalination of seawater basically takes place through using two main processing categories, either distillation-based or membrane-based. More than 60% of the desalinated seawater worldwide is produced by boiling it to create water vapor that is then condensed to accumulate fresh water. The standard process used for vapor-based production is vacuum distillation, which involves boiling the seawater below atmospheric pressure and therefore at a substantially lower than normal temperature. The primary membrane-based processes used for the desalination of seawater are reverse osmosis (RO) and electro dialysis (ED).
Reduce the costs of seawater desalination by using HDDW’s
Reverse osmosis plant membrane systems generally consume less energy than thermal distillation, but nevertheless, desalinating seawater is still a highly energy intensive process. However, the use of HDDW’s in the seawater desalination process can significantly reduce costs. HDDW’s operate with higher efficiency by extracting water from the ground below the salt water source – which acts as a natural area filter – making it much easier, faster and less expensive to remove any remaining salt in the water after extraction.
Desalination of seawater to create drinking water
Converting seawater to drinking water is the most commonly known usage of desalination, but the process can also be employed for improving the purity of other water sources, either semi-saline (estuarial) or simply those of poor quality. Membrane-based desalination technologies are often used for applications such as tap water purification systems or domestic wastewater treatment facilities, and they can also remove contaminants such as dissolved heavy metals, arsenic, bacteria and other pathogens. To ask any questions or to discuss the possibilities of an HDDW for your specific situation or project, please contact us by e-mail, phone, LinkedIn or by filling in the top right form.