RODI waste reclaim system

NH_Reef · 03/05/2006, 12:56 PM

I am looking for a DIY or available for purchase system that I can incorporate into my RODI system in order to reuse some of the excessive amount of waste water produced. I'm on a well and have tried numerous things to no avail. Any help is appreciated.

dgasmd · 03/05/2006, 01:35 PM

I hope someone with extensive professional water treatment experience can chime in for you. However, I would not re-use the waste water. What would be better I think would be to improve the total volume of water wasted. If I read you right, you DON'T WANT to waste so much water. What I would do is 2 things:

1. Get a booster pump for your unit. By increasing the incoming pressure to 90-95 PSI you make your membrane much more efficient. It also increases dramatically your total output, especially in the cold winter months. I went from 60 gpd with a 100 GPD membrane pre-booster pump to about 165 GPD after getting the pump.

2. Get an adjustable flow restrictor with a flush kit. You can adjust the ratio to get a 1:3 product to waste ratio. It will still make your membrane last 16-18 months or more depending on your water usage and significantly decreases the waste. Lower ratios like 1:2 or even 1:1 will adversely decrease the life of your membrane.

Hope that helps.

NH_Reef · 03/05/2006, 02:28 PM

Thanks man. Unfortunately, I have done both and still nothing.
Another thing I was thinking of is moving my booster to right before the RO membrane. That way I am only pushing through the RO and the 2 DI beds instead of all 6 stages. It just seems a waste to dump all those gallons of semi clean water down the drain instead of recycling it through the system.

dgasmd · 03/05/2006, 02:33 PM

Someone suggested the following in a thread, but I don't know of anyone that has done it:

Take a 55g drum and fill it with tap water. Take your waste line and have it come back to the 55g drum. Take the intake line for your booster pump from the 55g drum. That way, all the waste comes back to be re-used. Every time the container gets to 1/2, fill it back up with tap water.

NH_Reef · 03/05/2006, 02:59 PM

That's what I was thinking.
I may have to get a bigger booster though.
Right now it's hooked up to the house water main.
What are you using for a booster? (manufaturer)

dgasmd · 03/05/2006, 03:08 PM

Aquatec 8800 booster pump -

NH_Reef · 03/05/2006, 03:21 PM

Have you seen this little thing?
http://www.marinedepot.com/md_viewIt...roduct=YSP5573

03/05/2006, 12:56 PM	#1
NH_Reef Registered Member Join Date: Jun 2003 Location: Brookline, nh Posts: 300	RODI waste reclaim system I am looking for a DIY or available for purchase system that I can incorporate into my RODI system in order to reuse some of the excessive amount of waste water produced. I'm on a well and have tried numerous things to no avail. Any help is appreciated.

03/05/2006, 01:35 PM	#2
dgasmd Registered Member Join Date: Dec 1999 Location: US Posts: 3,402	I hope someone with extensive professional water treatment experience can chime in for you. However, I would not re-use the waste water. What would be better I think would be to improve the total volume of water wasted. If I read you right, you DON'T WANT to waste so much water. What I would do is 2 things: 1. Get a booster pump for your unit. By increasing the incoming pressure to 90-95 PSI you make your membrane much more efficient. It also increases dramatically your total output, especially in the cold winter months. I went from 60 gpd with a 100 GPD membrane pre-booster pump to about 165 GPD after getting the pump. 2. Get an adjustable flow restrictor with a flush kit. You can adjust the ratio to get a 1:3 product to waste ratio. It will still make your membrane last 16-18 months or more depending on your water usage and significantly decreases the waste. Lower ratios like 1:2 or even 1:1 will adversely decrease the life of your membrane. Hope that helps. __________________ Arguing with ignorant people is an exercise in futility. They will bring you down to their level and once there they will beat you with their overwhelming experience. Current Tank Info: Currently out of the hobby, but considering a Comeback V 2.1!

03/05/2006, 02:33 PM	#4
dgasmd Registered Member Join Date: Dec 1999 Location: US Posts: 3,402	Someone suggested the following in a thread, but I don't know of anyone that has done it: Take a 55g drum and fill it with tap water. Take your waste line and have it come back to the 55g drum. Take the intake line for your booster pump from the 55g drum. That way, all the waste comes back to be re-used. Every time the container gets to 1/2, fill it back up with tap water. __________________ Arguing with ignorant people is an exercise in futility. They will bring you down to their level and once there they will beat you with their overwhelming experience. Current Tank Info: Currently out of the hobby, but considering a Comeback V 2.1!

03/05/2006, 03:08 PM	#6
dgasmd Registered Member Join Date: Dec 1999 Location: US Posts: 3,402	Aquatec 8800 booster pump - __________________ Arguing with ignorant people is an exercise in futility. They will bring you down to their level and once there they will beat you with their overwhelming experience. Current Tank Info: Currently out of the hobby, but considering a Comeback V 2.1!

03/05/2006, 02:28 PM	#3
NH_Reef Registered Member Join Date: Jun 2003 Location: Brookline, nh Posts: 300	Thanks man. Unfortunately, I have done both and still nothing. Another thing I was thinking of is moving my booster to right before the RO membrane. That way I am only pushing through the RO and the 2 DI beds instead of all 6 stages. It just seems a waste to dump all those gallons of semi clean water down the drain instead of recycling it through the system.

03/05/2006, 02:59 PM	#5
NH_Reef Registered Member Join Date: Jun 2003 Location: Brookline, nh Posts: 300	That's what I was thinking. I may have to get a bigger booster though. Right now it's hooked up to the house water main. What are you using for a booster? (manufaturer)

03/05/2006, 03:21 PM	#7
NH_Reef Registered Member Join Date: Jun 2003 Location: Brookline, nh Posts: 300	Have you seen this little thing? http://www.marinedepot.com/md_viewIt...roduct=YSP5573