[Nathanael Jones]

I saw Ionics are doing a zero reject RO system now.
With hose pipe bans and rising water charges etc, it a very appealing idea,... but a very unappealing price tag.

How does it work? Can I modify my existing setup to be zero reject?

I assume they use a booster pump and extra membranes to minimise reject in the first place, probably down to about 20%,... but how do they get rid of that last 20% (Without using sack loads of resin!)??

[windowwashers]

I saw Ionics are doing a zero reject RO system now.
With hose pipe bans and rising water charges etc, it a very appealing idea,... but a very unappealing price tag.

How does it work? Can I modify my existing setup to be zero reject?

I assume they use a booster pump and extra membranes to minimise reject in the first place, probably down to about 20%,... but how do they get rid of that last 20% (Without using sack loads of resin!)??

wait six months and check back on here and i guess the answer will be here.
what is the price tag by the way ??

[Neil Williams]

Reject water is fed back into the inlet side and this is where I believe the problem begins.
Normal inlet water 300 ppm, the reject water is fed into this and the ppm rises to lets say 350. Gradually this will creep up until the membranes have to deal with lets say 450 ppm. Not soon after it's on the phone for new membranes.

[need a cleaner]

my reject from a 290/300 in tds is 450+

[NWH]

If you don`t mind buying a sack of resin a week go for it.

[windowwashers]

my in water is way over 400 to start with lol 

[Nathanael Jones]

The Ionics mag mentions a RO-Bak filter. I'm guessing this is a special filter that the rejected water passed through before being re-circulated into the system.
If this was standard resin,... then you'd use as much resin as a DI only setup,.. which is hardly enviromentally friendly.

I'll send an e-mail to RO-man,.. see if they have any ideas!

[need a cleaner]

I would belive that would be alot more costly than the resin we use