Hi All,
I basically need to survive by the beach in a caravan, on a dry island, near the beach, with no fresh water available so I need to make it myself.
I have thought of two possible options but please let me know if you think there are other better methods. Both of my options use RO membranes.
Method 1) is to use Seawater RO membrane . I know there are ready solutions for this but they are so expensive I can't afford. I see the cheapest one is 250$ from FilmTec, are there any cheaper ones ? How would someone use the Seawater RO membrane , similar to household system ? Like Sediment - > Carbon -> RO -> Post ? I understand these seawater RO membranes need high PSI pumps but I guess thats not a problem.
Method 2) Use a dehumidifer and just Sediment-<Carbon->RO(with UV for viruses/bacteria ? ) this water.
Also, why can't I use simple RO membranes for seawater ? Whats the real difference between simple RO and SWRO membranes that makes SWRO so much more expensive ? Is it the salt rejection rate ? Or something else ? If it's the salt rejection rate , surely I could use 2 membranes or loop the water again through the RO membrane , surely that would do the trick ?
I have 3.6KW of Solar panels on the roof of the caravan and the island is very sunny and warm so I could always also distill some water but wouldnt that be a waste of energy ? I need the kwhrs for other things.
Thank you so much!
I basically need to survive by the beach in a caravan, on a dry island, near the beach, with no fresh water available so I need to make it myself.
I have thought of two possible options but please let me know if you think there are other better methods. Both of my options use RO membranes.
Method 1) is to use Seawater RO membrane . I know there are ready solutions for this but they are so expensive I can't afford. I see the cheapest one is 250$ from FilmTec, are there any cheaper ones ? How would someone use the Seawater RO membrane , similar to household system ? Like Sediment - > Carbon -> RO -> Post ? I understand these seawater RO membranes need high PSI pumps but I guess thats not a problem.
Method 2) Use a dehumidifer and just Sediment-<Carbon->RO(with UV for viruses/bacteria ? ) this water.
Also, why can't I use simple RO membranes for seawater ? Whats the real difference between simple RO and SWRO membranes that makes SWRO so much more expensive ? Is it the salt rejection rate ? Or something else ? If it's the salt rejection rate , surely I could use 2 membranes or loop the water again through the RO membrane , surely that would do the trick ?
I have 3.6KW of Solar panels on the roof of the caravan and the island is very sunny and warm so I could always also distill some water but wouldnt that be a waste of energy ? I need the kwhrs for other things.
Thank you so much!