HOW DESALINATION WILL BECOME A SOLUTION FOR WATER SHORTAGE?

 

As the world population keep on increasing, the pressure on freshwater bodies is also increasing parallelly. Demand for freshwater consumption is getting increased day by day like never before. As a matter of fact, 1 in 9 persons is already lacking in accessing safe water, if this trend persists the demand for water will exceed supply by 40%. Only, 0.7% of water is readily accessible and 96.5% of it is saltwater. So it is believed that the desalination water treatment process is the future scope for managing freshwater scarcity.

If global water scarcity worsens, the desalination plant will be the best choice for the vulnerable population across the world.

What Makes Water Saline?

Water that is saline contains significant amounts (referred to as "concentrations") of dissolved salts.  The concentration is the amount (by weight) of salt in water, as expressed in "parts per million" (ppm). If water has a concentration of 10,000 ppm of dissolved salts, then one percentage of the weight of the water comes from dissolved salts.

 Slightly saline water - From 1,000 ppm to 3,000 ppm

Moderately saline water - From 3,000 ppm to 10,000 ppm

Highly saline water - From 10,000 ppm to 35,000 ppm

 

 Why Sea Water Desalination?

Seas have ample water to support the human race for thousands of years. Naturally, it can be converted via seawater desalination to be used for drinking. More than that, this particular option offers so many opportunities in resolving the crisis.

• Desalination offers the comfort of potable water being available without the stress of exhaustion.
• At a larger scale, it provides safe drinking water to thousands of households daily making the supply to everyone a consistent service.
• The more advanced plants set up around the world use Reverse Osmosis as the core process for filtration. It is a proven method for potable drinking water.
• Countries are less dependent on natural resources which can now begin replenishing via the water cycle.
• Even better, the process of RO purification of waste from industries can give safe water that can be used to refill the aquifer, lakes, reservoirs of the region and in turn lifting stress from the environment.

 

How Desalination Process Works?

Seawater desalination is the removal of salt and impurities from seawater to produce fresh water. Seawater is pumped into the desalination plant from the ocean and passes through pre-treatment filtration to remove most of the large and small particles.

The filtered seawater is then forced under pressure through special membranes whereby the osmosis process that normally occurs in nature is reversed. The pores in the membranes are so tiny that salt, bacteria, viruses and other impurities are separated from the seawater. In essence, they act like microscopic strainers. About half of the water that enters the plant from the sea becomes fresh drinking water. The salt and other impurities removed from the seawater is then returned to the ocean via diffusers, which ensures it mixes quickly and prevents impacting the marine environment.

 

Desalination Methods For Converting Sea Water To Fresh Water.

Thermal Desalination Process:

Its underlying concept is a multi-effect process in which a spray of seawater is repeatedly evaporated and then condensed, with each effect at a lower temperature and pressure. This highly efficient process multiplies the quantity of pure water that can be produced using a given quantity of energy,  however, it is not a recommended process, because it requires a lot of heat and energy to reach the vaporization stage.

 Reverse Osmosis Desalination Process:

In reverse osmosis desalination, water is taken from the sea and receives the first treatment to eliminate impurities, oil, seaweed, rubbish, and so on. Once free of organic substances, the saltwater can be subjected to reverse osmosis. After the filtering, we have two streams: one brine and the other freshwater. The brine solution is diluted before being returned to the sea, avoiding high concentrations of salt which could harm the ecosystem. The freshwater passes through a demineralization and chlorination process, after which it is stored in tanks and then sent to the distribution network for consumption.

Reverse osmosis is not only the most advanced desalination system in the world today, but it is also the most efficient and beneficial for the planet: it generates up to four-and-a half-times fewer greenhouse gas emissions than all other technologies, it doesn’t harm the marine environment, and it’s able to recover a large part of the energy used in the process.

 

How GRAM can help you?

We provide international technology for water treatment to industrial, domestic requirements of water and wastewater treatment and an extensive track record in the designing, supplying, and constructing of plants across the world for the treatment of water, wastewater, sewage water, and sludge.

Our team comprises highly qualified environment engineers, experts, and techno crafts in the field of water treatment management. We are the best water treatment company in Coimbatore, Tamilnadu. We committed ourselves to providing best in class water treatment service to save our environment as possible as we can. We provide all kinds of solutions to water and wastewater treatment.

For any enquiry call: 9600772583

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