Exhausting DI quickly - Please Help - Page 2

Buckeye Hydro · 08/03/2016, 05:47 AM

Feel free to give us a call when you are in front of the system if you still need help troubleshooting it.

Russ

asudavew · 08/03/2016, 08:23 AM

Increase your waste water and pressure. I prefer a manual valve on my waste water hose instead of the standard re stricter. That way I can adjust waste water to the exact spec I want. (fine tune) Its interesting to watch the TDS change when adjusting the waste water valve. There is a trade off for cleaner RO and that is more waste water.

Trying to limit waste water can be counter productive for TDS.

Also, can you increase the pressure of your pump? 100 would be nice. That should also help.

Buckeye Hydro · 08/03/2016, 09:05 AM

Careful with running the pump at 100 psi - we recommend exceeding 80 ONLY if the pump is installed AFTER the prefilter housings (where all booster pumps should be installed).

Russ

CUSE1315 · 08/03/2016, 09:55 AM

I received a new membrane from Spectra. I am still using DI too quickly (in my opinion) but also using filters quickly as well. I am on well water. I am running 1 micro sediment then a 5 micron carbon followed by a 99 percent rejection rate membrane (90GPD) and then a dual DI.

My booster pump is giving me about 73 on the pressure reading (up from 43). It does seem to have made some difference on overall output (maybe getting 125 gallons per DI cartridge now about doubling previous).

I have pretty much run the spectrum of what I could try and fix or change.

Buckeye Hydro · 08/03/2016, 10:06 AM

Give us a call if you want help.

Russ

CUSE1315 · 08/03/2016, 10:12 AM

I appreciate the offer Russ, unfortunately I am not sure there is anything else left to fix. Thank you though!

Buckeye Hydro · 08/03/2016, 10:18 AM

check recovery rate, adjust if needed.
check for internal crack in RO housing
check RO membrane orings
resolve short cycling, if that happens at all
are you exceeding the life span on your carbon block(s)?
Have you checked to make sure your TDS reading are accurate?

CUSE1315 · 08/03/2016, 10:30 AM

The only thing I am unsure how to test is the recovery rate.

I do not believe there is any cracks in the RO housing (same issue with 2 different units)
O ring are fine (same issue with 2 units)
I have been running (15-30 gallon runs) and flushing membrane before and after
I will have to change out the carbon blocks more often (was changing every 3 months) but I will start now as soon as I see a drop in pressure

I have a handheld and the inline TDS reading and both are coming out similar
if not exactly the same

Buckeye Hydro · 08/03/2016, 10:33 AM

Line up 8 IDENTICAL cups (we use solo beer cups) in front of the system. With your waste water tube in one hand, and your purified water tube in the other, how many cups do you fill with waste water in the time it takes you to fill 1 cup with purified water?

CUSE1315 · 08/03/2016, 10:34 AM

Okay I will do that test. I know my water is very hard. That could be some of the issue.

drummerboyevil · 08/03/2016, 11:27 PM

Collect some water after RO but before DI. Test the alkalinity, temperature and pH (with a ph meter) of this water. Come back when you have these numbers.

Sent from my iPad using Tapatalk

Buckeye Hydro · 08/04/2016, 02:37 AM

Quote:

Originally Posted by CUSE1315

Okay I will do that test. I know my water is very hard. That could be some of the issue.

Hardness feedwater does a couple of things. First, it increases the liklihood that you will deposit scale inside the RO membrane. When you scal a membrane flow of permeate slows down.

High hardness means high feedwater TDS - you can mitigate this by adding 1 psi of pressure for every 100 ppm of feedwater TDS.

CUSE1315 · 08/31/2016, 07:01 AM

A little update. I have tested for CO2 and have come out to 11 PPM so I do not feel this is the issue.

I have gone through a 1 micron sediment and a 5 micron carbon block in a month.

In 2 months my NEW membrane has gone from 6 TDS to 16 now.

I am sure I am going to have to add something to avoid any future scaling of my membranes (assuming this is what is happening). I am just not sure what I need to add.

My filters are completely destroyed which likely lead to my membrane again being destroyed. I am not sure if I should look for a new membrane considering the situation currently.

Buckeye Hydro · 08/31/2016, 07:15 AM

Call in when you are in front of the system if you'd like to cut to the chase on your troubleshooting.

Russ
513-312-2343

CUSE1315 · 08/31/2016, 04:18 PM

Russ, first off thank you for all the help, wisdom, and knowledge you gave me today.

I did the acid test with vinegar on an old membrane (membrane was still wet).

I did not notice any foaming and no color change. I will test my other membrane once it is removed.

Again thanks for everything!

08/03/2016, 08:23 AM	#27
asudavew Registered Member Join Date: Jan 2013 Location: San Angelo, Texas Posts: 1,010	Increase your waste water and pressure. I prefer a manual valve on my waste water hose instead of the standard re stricter. That way I can adjust waste water to the exact spec I want. (fine tune) Its interesting to watch the TDS change when adjusting the waste water valve. There is a trade off for cleaner RO and that is more waste water. Trying to limit waste water can be counter productive for TDS. Also, can you increase the pressure of your pump? 100 would be nice. That should also help. __________________ Be nice. Current Tank Info: 180, 125, 75

08/03/2016, 05:47 AM	#26
Buckeye Hydro .Registered Member Join Date: Sep 2006 Location: Cincinnati, Ohio Posts: 4,857	Feel free to give us a call when you are in front of the system if you still need help troubleshooting it. Russ

08/03/2016, 09:05 AM	#28
Buckeye Hydro .Registered Member Join Date: Sep 2006 Location: Cincinnati, Ohio Posts: 4,857	Careful with running the pump at 100 psi - we recommend exceeding 80 ONLY if the pump is installed AFTER the prefilter housings (where all booster pumps should be installed). Russ

08/03/2016, 09:55 AM	#29
CUSE1315 Registered Member Join Date: Apr 2015 Location: Syracuse Posts: 327	I received a new membrane from Spectra. I am still using DI too quickly (in my opinion) but also using filters quickly as well. I am on well water. I am running 1 micro sediment then a 5 micron carbon followed by a 99 percent rejection rate membrane (90GPD) and then a dual DI. My booster pump is giving me about 73 on the pressure reading (up from 43). It does seem to have made some difference on overall output (maybe getting 125 gallons per DI cartridge now about doubling previous). I have pretty much run the spectrum of what I could try and fix or change.

08/03/2016, 10:06 AM	#30
Buckeye Hydro .Registered Member Join Date: Sep 2006 Location: Cincinnati, Ohio Posts: 4,857	Give us a call if you want help. Russ

08/03/2016, 10:12 AM	#31
CUSE1315 Registered Member Join Date: Apr 2015 Location: Syracuse Posts: 327	I appreciate the offer Russ, unfortunately I am not sure there is anything else left to fix. Thank you though!

08/03/2016, 10:18 AM	#32
Buckeye Hydro .Registered Member Join Date: Sep 2006 Location: Cincinnati, Ohio Posts: 4,857	check recovery rate, adjust if needed. check for internal crack in RO housing check RO membrane orings resolve short cycling, if that happens at all are you exceeding the life span on your carbon block(s)? Have you checked to make sure your TDS reading are accurate?

08/03/2016, 10:30 AM	#33
CUSE1315 Registered Member Join Date: Apr 2015 Location: Syracuse Posts: 327	The only thing I am unsure how to test is the recovery rate. I do not believe there is any cracks in the RO housing (same issue with 2 different units) O ring are fine (same issue with 2 units) I have been running (15-30 gallon runs) and flushing membrane before and after I will have to change out the carbon blocks more often (was changing every 3 months) but I will start now as soon as I see a drop in pressure I have a handheld and the inline TDS reading and both are coming out similar if not exactly the same

08/03/2016, 10:33 AM	#34
Buckeye Hydro .Registered Member Join Date: Sep 2006 Location: Cincinnati, Ohio Posts: 4,857	Line up 8 IDENTICAL cups (we use solo beer cups) in front of the system. With your waste water tube in one hand, and your purified water tube in the other, how many cups do you fill with waste water in the time it takes you to fill 1 cup with purified water?

08/03/2016, 10:34 AM	#35
CUSE1315 Registered Member Join Date: Apr 2015 Location: Syracuse Posts: 327	Okay I will do that test. I know my water is very hard. That could be some of the issue.

08/03/2016, 11:27 PM	#36
drummerboyevil Registered Member Join Date: Jul 2004 Posts: 654	Collect some water after RO but before DI. Test the alkalinity, temperature and pH (with a ph meter) of this water. Come back when you have these numbers. Sent from my iPad using Tapatalk

08/31/2016, 07:01 AM	#38
CUSE1315 Registered Member Join Date: Apr 2015 Location: Syracuse Posts: 327	A little update. I have tested for CO2 and have come out to 11 PPM so I do not feel this is the issue. I have gone through a 1 micron sediment and a 5 micron carbon block in a month. In 2 months my NEW membrane has gone from 6 TDS to 16 now. I am sure I am going to have to add something to avoid any future scaling of my membranes (assuming this is what is happening). I am just not sure what I need to add. My filters are completely destroyed which likely lead to my membrane again being destroyed. I am not sure if I should look for a new membrane considering the situation currently.

08/31/2016, 07:15 AM	#39
Buckeye Hydro .Registered Member Join Date: Sep 2006 Location: Cincinnati, Ohio Posts: 4,857	Call in when you are in front of the system if you'd like to cut to the chase on your troubleshooting. Russ 513-312-2343

08/31/2016, 04:18 PM	#40
CUSE1315 Registered Member Join Date: Apr 2015 Location: Syracuse Posts: 327	Russ, first off thank you for all the help, wisdom, and knowledge you gave me today. I did the acid test with vinegar on an old membrane (membrane was still wet). I did not notice any foaming and no color change. I will test my other membrane once it is removed. Again thanks for everything!