Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Terry A on June 10, 2011, 05:05:03 pm
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I'm on a water metre so this has to be considered.
I need to produce about 750 litres a day.
Is there a system that produces little or no waste?
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No
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dont ionic do a system with no/or little waste .
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The Ionics system still produces 20% waste ,apparently,and an 800 ltr system is £6245 + vat. Its basically a glorified twin ro system
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Use di only and have no waste at all :)
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Terry,whats your tap tds because if its under 100ppm then twin 25 di's would be a viable option,giving you no waste?
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The Ionics system still produces 20% waste ,apparently,and an 800 ltr system is £6245 + vat. Its basically a glorified twin ro system
this company have the most outrageous prices!
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I'm on a water metre so this has to be considered.
I need to produce about 750 litres a day.
Is there a system that produces little or no waste?
Terry, I've done the maths on this. If you're on a water meter, it's MUCH cheaper to run at 50:50 pure:waste and knacker your membranes regularly than to spend the money on water.
Let's say your water (inc sewerage charge) is £3/1,000 litres.
Run at an ideal 20:80 ratio and each 1,000 litres will cost you £15
Run at 50:50 they will cost £6.
You don't need to save £9 for many days (well, 25 days, to be exact) to pay for a £225 4040 RO membrane.
Vin
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The Ionics system still produces 20% waste ,apparently,and an 800 ltr system is £6245 + vat. Its basically a glorified twin ro system
this company have the most outrageous prices!
Waiting for your ban?
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I'm on a water metre so this has to be considered.
I need to produce about 750 litres a day.
Is there a system that produces little or no waste?
Terry, I've done the maths on this. If you're on a water meter, it's MUCH cheaper to run at 50:50 pure:waste and knacker your membranes regularly than to spend the money on water.
Let's say your water (inc sewerage charge) is £3/1,000 litres.
Run at an ideal 20:80 ratio and each 1,000 litres will cost you £15
Run at 50:50 they will cost £6.
You don't need to save £9 for many days (well, 25 days, to be exact) to pay for a £225 4040 RO membrane.
Vin
That is a good point Vin but also worth remembering that your output Tds reading will also very likely be higher with a 50:50 ratio so will reduce the life of the polishing resin.
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I have a 400gpd pumped system from www.vyair.com
Cheap as chips, good output TDS, and the waste ration is very near 50:50. If you're producing a lot of water you may want to get brand name membranes when they need changing, but I'm doing fine with the cheapo Chinese ones that came with the unit. :)
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we run two ro systems
unit one - twin 4040 pumped (grundfos pump) all fancy, all singing, all dancing, auto-flush etc. Cost me a packet but was well worth the money, only bought one bag of resin in near 5 years and produces about 800ltrs a day, 5 days a week. Prefilter changed every 4 weeks and carbon changed every 8 weeks.
unit two - merlin, produces about 600ltrs a day, needs membranes changed soon and goes through a bag of resin every 6 months (twin 18ltr di). Prefilters same as above with no merlin prefilter in top sump, just using 2 pentek 10inch housings before ro.
Tap tds for both is around 100ppm if I remember correctly although units are at seperate sites.
personally I would go for something similare to the first ro - twin 4040 or single 4040 but with a good pump and remember to flush regular. I get about 50/50 waste to pure ratio and produce a minimum of 350ltrs/hr.
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I'm on a water metre so this has to be considered.
I need to produce about 750 litres a day.
Is there a system that produces little or no waste?
Terry, I've done the maths on this. If you're on a water meter, it's MUCH cheaper to run at 50:50 pure:waste and knacker your membranes regularly than to spend the money on water.
Let's say your water (inc sewerage charge) is £3/1,000 litres.
Run at an ideal 20:80 ratio and each 1,000 litres will cost you £15
Run at 50:50 they will cost £6.
You don't need to save £9 for many days (well, 25 days, to be exact) to pay for a £225 4040 RO membrane.
Vin
That is a good point Vin but also worth remembering that your output Tds reading will also very likely be higher with a 50:50 ratio so will reduce the life of the polishing resin.
Good point - must bring that into my calculations.
Vin