Difference between revisions of "Team:SJTU-BioX-Shanghai/Alpha"
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===1. Desalination tool=== | ===1. Desalination tool=== | ||
− | + | 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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The mechanism of RO method can be explain through two parts: membranes and pressure. | 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. | 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. This force we called it osmotic pressure, yet, desalination process is working against osmotic pressure. Therefore, we have to give an artificial pressure called reverse | 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. This force we called it osmotic pressure, yet, desalination process is working against osmotic pressure. Therefore, we have to give an artificial pressure called reverse | ||
Revision as of 08:51, 19 August 2015
Contents
This is the NaCl bio-desalination tool
1. Desalination tool
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.
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. This force we called it osmotic pressure, yet, desalination process is working against osmotic pressure. Therefore, we have to give an artificial pressure called reverse
西瓜
马先生>v<~
南瓜
万圣节
Background Infomation
BG lies here.
Global Warming
hothothot
Less Freshwater
.....
Solution & Plan
We gonna do what what what ...
Result
We should have succeed but ...
Part 1
balabalabala...
Part 2
xxxxxxxxx
Part Three
yyyyyyyyy