This website uses cookies to ensure you have the best experience. Learn more

Producing Drinking Water With Desalination Technology

1826 words - 7 pages

Desalting refers to a water treatment process that removes salts from water. It is also called desalination or desalinization. Desalting can be done in a number of ways, but the result is always the same: drinking water is produced from brackish (somewhat salty) water or seawater. Desalting technologies can be used for a number of applications, but the purpose of this report is to discuss the use of desalting to produce drinking water from saline water for domestic or municipal purposes. Throughout history, people have continually tried to treat salty water so that it could be used for drinking and agriculture. Of all the globe’s water, 94 percent is salt water from the oceans and 6 percent is fresh. Of the latter, about 27 percent is in glaciers and 72 percent is underground.
While this salt water is important for transportation and fisheries, it is too salty to sustain human life or farming. Desalting techniques have increased the range of water resources available for use by a community. Until recently, only water with a dissolved solid (salt) content generally below about 1,000 milligrams per liter (mg/L) was considered acceptable for a community water supply. This limitation sometimes restricted the size and location of communities around the world and often led to hardship for many who could not afford to live near a ready supply of fresh water. The application of desalting technologies over the past 50 years has changed this in many places. Villages, cities, and industries have now developed or grown in many of the arid and water-short areas of the world where sea or brackish waters are available and have been treated with desalting techniques.
This change has been very noticeable in parts of the arid Middle East, North Africa, and some of the islands of the Caribbean, where the lack of fresh water severely limited development. Now, modern cities and major industries have developed in some of those areas thanks to the availability of fresh water produced by desalting brackish water and seawater.
About half of the world ’s desalted water is produced with heat to distill fresh water from seawater. The distillation process mimics the natural water cycle in that salt
water is heated, producing water vapor that is in turn condensed to form fresh water. In a laboratory or industrial plant, water is heated to the boiling point to produce the maximum amount of water vapor. The process that accounts for the most desalting capacity for seawater is multi-stage flash distillation, commonly referred to as the Multi-Stage Flash process or MSF.
In the MSF process, seawater is heated in a vessel called the brine heater. This is generally done by condensing steam on a bank of tubes that carry seawater, which passes through the vessel or brine-heater. This heated seawater then flows into another vessel, called a stage; where the ambient pressure is lower, causing the water to immediately boil. The sudden introduction of the heated water into the...

Find Another Essay On Producing Drinking Water With Desalination Technology

Two possible solution to water Crisis in Sudan

1305 words - 6 pages for high cost of desalination plants. Desalination has previously been introduced in Sudan with two plant established in 2004 producing 10,000 cubic meter of portable water per day. However because of lack of expertise and maintenance both plant were temporarily decommissioned. The fact that Sudan had 853 meter sea line which will serve as the feed stock to the desalination plant, the abundant reserve of crude oil to reduce cost of the plant

kuwait water mangment Essay

2438 words - 10 pages is used only by in producing power and desalinated water by Extraction-condensing steam turbine combined (Darwish& AI-Najem, 2005). RO desalination method is another common method in Kuwait .this system is used to for sea water with salinity range from 30-35 PPM. It is can be defined as water purification technology normally it use semipermeable membrane. This technology is used to overcome osmotic pressure which is happened by chemical

The Global Water Shortage

1108 words - 4 pages cost of potable water rises, the price of recycled water will go up more slowly than both imported water and desalinated water in spite of external factors. Also modern technology makes it possible to get safe drinking water satisfying all sanitary requirements as a result of disinfection with ultraviolet light. These two advantages related to safety and availability make recycling of water effective to use. Today Singapore has five treatment

Desalination

1450 words - 6 pages California with its own water problems, doubling the population is not good news. California is in need of drastic reconstruction of its water supply system and desalination can be a viable resource in supplying clean water to the urban sectors of the state. Most years California will receive most of its rainfall between the months from November and March, but when the precipitation doesn’t occur California experiences drought conditions. California has

Water shortages and desalinisation

1663 words - 7 pages proper dilution into the oceans. The Clean Water Act, National Pollutant Discharge Elimination System (NPDES), and Safe Drinking Water Act are all federal regulations that need to be complied with by desalinization plants. The Clean Water Act states that any discharge into surface waters is unlawful without a permit. It required the EPA to sets the basis for the NPDES program which allows for a certain amount of polluting based on the permit

Water Needs In Singapore

2901 words - 12 pages , we consume about 300 million gallons of clean water a day. In future, as our population and economy continue to grow, we will require more clean water for our industry and more potable water for our people. Surrounded by seawater, desalination is a proven technology that we can adopt to produce affordable good quality drinking water. Even as we continue with our desalination plans, we must also carefully scrutinise

The Shortage of Fresh Clean Water

649 words - 3 pages cycle but if the human activities consumed more than is restored by nature, the quantity of fresh water is reduced. Therefore, the challenge is to get the freshwater to the right place and in the right quantities. However, all form of water processing requires energy, so an increased demand for water will inevitably require more energy. With some of the engineering development use of improved technology by few countries to produce a better water

Sudan´s Fresh Water Supply

1991 words - 8 pages enough to be tapped at an affordable cost. The lack of portable drinking water needs not be overemphasized as more than 1.2 billion people in the world lack access to clean drinking water (UNDP, 2006). The situation is projected to get worse as the needs for water increases due to city development and population growth with an estimate of 1.8 billion people to live in absolute water scarcity by 2025. The arid regions are the most affected with

The proposed desalination plant of Kurnell, Botany Bay

1378 words - 6 pages season, Sydney's water supply will not be undermined. The desalination plant will also be in use in non-drought periods, producing 125 million litres of water per day. However this mass desalination of water involves many negative consequences. It is argued that this desalination plant is environmentally and financially unsound. A plant as large as this would require 900 gig watt hours of electricity each year. This would result in a significantly

Sustainability of Water Provision in Less Economically Developed Countries

1179 words - 5 pages , this trend is generally consistent with developed and developing countries (GCSE Bitesize , 2010). Figure 3 demonstrates the issues with access to potable water. It can be seen that the majour disputes are within the low economically developed countries. Where around ¾ of Africa’s countries have a population less that 65% living without an improved water source. Small scale, point of use technology appears to be the most effective way of

water is essential to human life

618 words - 2 pages Everyone knows that water is essential to human life, but one third of the world's population lacks sufficient access to safe drinking water and sanitation to meet their basic needs. [www.gwp.org]Every year 3 million people die prematurely from water-related diseases in developing countries. [www.gwp.org] 884 million people in the world still do not get their drinking-water from improved sources, almost all of them in developing regions

Similar Essays

Problems With Drinking Water Quality Essay

603 words - 2 pages . Earth is the solar system’s water planet, and two-thirds of its surface is water. Humans are creatures of the earth and we reflect its makeup; our bodies are sixty percent water. The volume of water on the earth remains about what it was in Coleridge’s day; however, with a growing human population come growing demands, especially for potable water.  Ninety-seven percent of the water on Earth is saltwater, and most of the freshwater is locked

Problems With Drinking Water Supplies In Kenya

878 words - 4 pages Water is a bare necessity both for the survival of an individual and a nation. Freshwater scarcity has become a global concern as the projected worldwide demand on water exceeds supplies. Less developed countries in particular are currently suffering from severe water shortages and water contamination. "…half the population of our "civilized" world suffers today with water services inferior to those of the ancient Greeks and Romans

Providing The World With Drinking Water In The 21st Century

1026 words - 4 pages need of fresh water tend to be rurally dominated and economically challenged. The problems in these areas arise from a lack of a central freshwater source. There are many sources of water in these areas, but most them are polluted. Thus engineers have worked hard to develop decentralized distillation units. Providing villages with a unit would greatly decrease the scarcity of fresh water. The technology behind these units continues to be

Feasibility Of Different Techniques For Providing Fresh Water

1568 words - 6 pages health, agriculture and economic problems for instance, in Kenya, where “over 10,000 children die every year from diarrhea caused by unsafe drinking water and poor sanitation” (WaterAid, n.d) and some parts of central Asia where there is not enough water to cultivate plants. This report evaluates the feasibility of two different water provision techniques: desalination and ground water pumping; that can be used to provide fresh water to arid