RODI UNIT WASTE WATER

[ajhudson15]

Would it be acceptable to split off the waste water line and have some go to waste and some be reran back through the rodi unit?

 

[Cyricdark]

You need this, watch the linked videos also


https://www.bulkreefsupply.com/water-saver-upgrade-kit-bulk-reef-supply.html

 

[ajhudson15]

You need this, watch the linked videos also


https://www.bulkreefsupply.com/water-saver-upgrade-kit-bulk-reef-supply.html

Ive seen those. I just really don't have the extra room for water storage other than the good water I catch for the tanks

 

[Cyricdark]

Well the water saver upgrade reduces the amount of waste water you produce by running it through two different membranes you're always going to have Wastewater with the Rodi I system that's how they function if you're looking for Less Wastewater this is the way to do it what you're talking about with chew through membranes really fast and probably wouldn't give you 0 TDS water

Ive seen those. I just really don't have the extra room for water storage other than the good water I catch for the tanks

 

[TheHarold]

I believe your water pressure related to whether you will benefit from a dual membrane or recirculating setup.

 

[randyBRS]

Would it be acceptable to split off the waste water line and have some go to waste and some be reran back through the rodi unit?

Since membranes are rated at a 98%+ rejection rate already, recirculating the high TDS waste water back through the membrane to attempt to gain an additional ~2%, will actually result in worse rejection rate. Meaning less performance and higher TDS output than with a single pass through. There's really no trade off, however as mentioned above there are some solid benefits to a dual membrane setup. Here are a couple of videos that outline how a dual membrane setup works and how pressure is a large factor in overall performance of the RODI unit.

 

[ajhudson15]

Since membranes are rated at a 98%+ rejection rate already, recirculating the high TDS waste water back through the membrane to attempt to gain an additional ~2%, will actually result in worse rejection rate. Meaning less performance and higher TDS output than with a single pass through. There's really no trade off, however as mentioned above there are some solid benefits to a dual membrane setup. Here are a couple of videos that outline how a dual membrane setup works and how pressure is a large factor in overall performance of the RODI unit.

Thanks Randy. I just purchased my 100gpd 5 stage plus unit and hope to get it set up this week. FYI, I love your videos they are always so helpful and informative.