asteroza + freshwater   13

REDstack heeft als doel het ontwikkelen en vermarkten van de RED technologie.
Not pressure retarded osmosis, but reverse electrodialysis power generation using freshwater/seawater salinity gradients.
reverse  electrodialysis  power  generator  green  energy  freshwater  seawater  water  salinity  gradient  Delicious 
may 2017 by asteroza
Stanford researchers use river water and salty ocean water to generate electricity
This is not an osmotic pressure power generator, rather a battery with flushable electrolytes that determine if it is in a charge or discharge phase. The added trick is using nanorods to increase the electrode area. Salinity is key here, meaning it doesn't have to be really clean freshwater, but the battery prefers brine over saltwater or brackish water. Hrm, I wonder if you could do this as secondary power generation for water desalination plants located on rivers next to oceans or salt lakes, using freshwater sources and desalination output brine?
manganese  dioxide  nanorod  electrode  freshwater  saltwater  water  salinity  electrolyte  battery  energy  storage  materials  science  research  technology  nanotechnology  power  generator  Delicious 
march 2011 by asteroza
DXV Water Technologies: Products
Basically these guys propose a long vertical tube in the sea, with a membrane over the low end. At the right depth, you get the necessary pressure. The problem is the pressure though, since the freshwater will fill the tube, increasing pressure on the output side of the membrane. You are then forced to pump from the bottom, which means you are similar (but less?) in energy expenditure to conventional pressure reverse osmosis.
high  pressure  seawater  reverse  osmosis  freshwater  water  production  tube  Delicious 
february 2011 by asteroza
Hold the salt: UCLA engineers develop revolutionary new desalination membrane / UCLA Newsroom
Interesting use of plasma treatment to make a microscopic polymer brush/fiber layer to sweep the desalination membrane surface as a physical approach to membrane maintenance (as opposed to typical chemical cleaning or flushing by reverse flow). Since this is an atmospheric pressure plasma treatment, I wonder if this could be applied as a form of antifouling treatment for fixed marine/ocean structures, such as barges, piers, oil rigs, and other structures where drag isn't much of an issue...
desalination  membrane  surface  plasma  treatment  topography  polymer  brush  layer  antifouling  freshwater  water  production  materials  science  research  technology  ocean  marine  structure  protection  saltwater  Delicious 
april 2010 by asteroza
WATER STANDARD - A Global Water Solution in Partnership with Nature
Using mobile offshore desalination plants for freshwater production. If the city doesn't want to pay anymore, you up and leave...
offshore  seawater  desalination  freshwater  water  production  tanker  mobile  ship  Delicious 
march 2010 by asteroza
SUN BELT WATER - NAFTA - Bulk Water Transport
Blocked by BC government and apparently going through NAFTA arbitration, this company wants to bulk deliver canadian freshwater via VLCC tankers converted to freshwater cargo storage.
water  freshwater  bulk  tanker  delivery  Delicious 
october 2009 by asteroza

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