Difference between revisions of "Team:SJTU-BioX-Shanghai"

Revision as of 22:47, 18 September 2015

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Problem

It is predicted that within the next 15 years, more than half of the world’s population will be living under severe water stress (OECD 2008).Global water shortage problem has never been more serious than right now. One of the solution relies on desalination technology, especially seawater. To make seawater desalination a world-wide technology, the method has to be less energy-cost and less equipment-dependent. After consulting literature and some visits, we identified the most effective approach is to create a cheap upstream desalination process that is not rely on sophisticated instruments.

Solution

The mechanism of RO method can be explain through two parts: membranes and pressure.

First, RO membranes are special membranes. Its layered, web-like structure only allows water to pass through by a tortuous pathway. Unlike nanofiltration (NF), ultrafiltration (UF) or micro-filtration (MF), RO membrane reject the smallest contaminants, monovalent ions. This properties allows this kind of membrane to process seawater desalination and even other filtration process requiring removal of monovalent ions.

The other important elements of RO method is osmotic pressure. In a normal status, water molecules always move from low salinity area to high salinity area.

Highlight

We express the related protein of our part in its right position. It proves the device is built successfully.
We prove that our device work as a desalintor in lab condition .
We design how it will merge into original method, and explain some key part of our design how it works.
We design how it will merge into original method, and explain some key part of our design how it works.

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 ==Problem==
-Over the past 50 years, dramatic improvements in RO membrane technology elevated RO to be the primary choice for new desalination facilities. Its salt rejections is significant comparing to other membrane methods. And its energy cost is much lower than traditional thermal process. In 2008, among over 15000 desalination plants in operation in worldwide, 50% of those are RO plants.
+It is predicted that within the next 15 years, more than half of the world’s population will be living under severe water stress (OECD 2008).Global water shortage problem has never been more serious than right now.
+One of the solution relies on desalination technology, especially seawater. To make seawater desalination a world-wide technology, the method has to be less energy-cost and less equipment-dependent.
+After consulting literature and some visits, we identified the most effective approach is to create a cheap upstream desalination process that is not rely on sophisticated instruments.
 ==Solution==