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

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==Goal==
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==Problem==
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Global water shortage problem has never been more serious ever.Right now, more than one in six people globally do not have access to safe drinking water (United Nations, 2006). Furthermore, the misuse of water source such as underground water has caused serious damage to the environment.
  
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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.
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Seawater is considered as a water source with great capacity and its desalination industry is expected to be one of the most important solutions tackling water shortage problem. However, there's still improvement needed on energy consumption and equipment requirement to make seawater desalination truly a world-wide technology.
  
 
==Solution==
 
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Reverse Osmosis, the mostly-used desalination technology, uses artificial membrane to extract salt. Have you ever considered biological membrane? And biodesalination is our answer!
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We use cyanobacteria as our desalination organism, the light-driven chloride pump as our desalination driver, dark-sensing promoter as our desalination controller, to establish a primary biodesalination system. We managed to decrease the concentration of sodium chloride by 20% and more optimizations may generate a greater degree of reduction.
  
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The mechanism of RO method can be explain through two parts: membranes and pressure.
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==Highlight==
  
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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.
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# We managed to functionally express halorhodopsin in cyanobacteria
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# We proved that our device works as a desalintor  in lab condition
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# We conducted research about the combination of our project with the formal desalination method
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# We mapped the water shortage problem in China
  
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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.
 
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==Accomplishment==
 
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# We express the related protein of our part in its right position. It proves the device is built successfully.
 
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# We prove that our device work as a desalintor  in lab condition .
 
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# We design how it will merge into original method, and explain some key part of our design how it works.
 
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# We design how it will merge into original method, and explain some key part of our design how it works.
 
  
  

Latest revision as of 03:43, 19 September 2015

Homepage

Next: Start the guided tour!

Problem

float = left

Global water shortage problem has never been more serious ever.Right now, more than one in six people globally do not have access to safe drinking water (United Nations, 2006). Furthermore, the misuse of water source such as underground water has caused serious damage to the environment.

Seawater is considered as a water source with great capacity and its desalination industry is expected to be one of the most important solutions tackling water shortage problem. However, there's still improvement needed on energy consumption and equipment requirement to make seawater desalination truly a world-wide technology.

Solution

float = left

Reverse Osmosis, the mostly-used desalination technology, uses artificial membrane to extract salt. Have you ever considered biological membrane? And biodesalination is our answer! We use cyanobacteria as our desalination organism, the light-driven chloride pump as our desalination driver, dark-sensing promoter as our desalination controller, to establish a primary biodesalination system. We managed to decrease the concentration of sodium chloride by 20% and more optimizations may generate a greater degree of reduction.

Highlight

  1. We managed to functionally express halorhodopsin in cyanobacteria
  2. We proved that our device works as a desalintor in lab condition
  3. We conducted research about the combination of our project with the formal desalination method
  4. We mapped the water shortage problem in China




Bio-X Institutes

Shanghai Jiao Tong University

800, Dongchuan Road 200240, Shanghai, China

kariny888@sjtu.edu.cn