VOC, ethanol removal with RO/GAC
VOC, ethanol removal with RO/GAC
(OP)
I am attempting to remove TOC, VOC, and ethanol from a process condensate steam for reuse as high pressure boiler feedwater. Our pilot work showss that wee get 75% removal (200 ppm down to 40 - 50 ppm) of TOC using RO membranes, with the remaining organics consisting primarily of low molecular weight VOC and ethanol.
Will a GAC column get us where we need? I am targeting less than 5 ppm TOC and this water will be re incorporated ahead of an existing demin/mixed bed train. System operates at 1250 psig including several turbine generators so organic acid loading will be a concern.
Any suggestions would be helpful regarding alternative treatment methods and and TOC feedwater limits.
Thanks
Will a GAC column get us where we need? I am targeting less than 5 ppm TOC and this water will be re incorporated ahead of an existing demin/mixed bed train. System operates at 1250 psig including several turbine generators so organic acid loading will be a concern.
Any suggestions would be helpful regarding alternative treatment methods and and TOC feedwater limits.
Thanks





RE: VOC, ethanol removal with RO/GAC
Gary Schreiber, CWS VI
The Purolite Co.
RE: VOC, ethanol removal with RO/GAC
Thanks for the response. I believe we procure Purolite resin (GE Water and Process Tech). I just had a meeting and it looks like we will need to use this waste stream for high pressure boiler feedwater make-up.
Jeff
RE: VOC, ethanol removal with RO/GAC
First, what is the flow rate and pressure of your condensate?
I can absolutely guarantee TOC below detection limits with my ArcLight system (see: www.oxilume.com). However, I doubt if it will be cost effective, unless of course you need steam plasma(+5,000F).
On the otherhand, the system can be operated in the high flow mode for organic destruction. The 100 KW ArcLight can be operated to as high as 500 gpm.
The system was developed for removing water soluable organics from oil & gas produced water (maintain below 32 ppm as required by EPA, US Coast Guard, MMS, etc.). The system has shown complete destruction of MTBE in drinking water. It is being tested on Paint Booth water from the world's largest automobile manufacture, and on WSO in Uranium mining wastewater effluent.
Also, the system must be operated with a filter, such as Purolite's. If you would like, I can email a presentation to you.
Sincerely,
Todd
Todd
www.oxilume.com