Water and Wastewater.com Help Forums - very saline (170 g/l CacL2) feed

(Moderator: Joseph Taylor)

‹ Previous Topic | Next Topic ›

Pages: 1

Send Topic

very saline (170 g/l CacL2) feed (Read 265 times)

Alin YaBB Newbies Offline I love Water and Wastewater.com Posts: 4 Saskatoon Gender: Company or Organization: TetraTech WEI	very saline (170 g/l CacL2) feed Jun 18^th, 2012, 11:15am what would be the methods to treat this very saline feed? The one pass efficiency would not be a factor and the quality of the product does not exceed the process water quality. Thank you
Back to top	AB IP Logged

grrun God Member Offline WaterandWastewa ter.Com is the best! Posts: 3526 Pekin, IL Gender: Company or Organization: Freelance Environmental Engine	Re: very saline (170 g/l CacL2) feed Reply #1 - Jun 18^th, 2012, 10:39pm What quantity or flow? What other contaminants are in the solution? What are the discharge limits? grrun
Back to top	IP Logged

Alin YaBB Newbies Offline I love Water and Wastewater.com Posts: 4 Saskatoon Gender: Company or Organization: TetraTech WEI	Re: very saline (170 g/l CacL2) feed Reply #2 - Jun 19^th, 2012, 8:49am the flow is about 2,000 m3/day and the quality of discharge goes a bit under the effluenht dicharge (for North Ameerica) as they want to recyccle all of it as process water
Back to top	AB IP Logged

Alin YaBB Newbies Offline I love Water and Wastewater.com Posts: 4 Saskatoon Gender: Company or Organization: TetraTech WEI	Re: very saline (170 g/l CacL2) feed Reply #3 - Jun 19^th, 2012, 8:51am The major contaminant is CaCl2 other than that only trace elements (P, F, N)
Back to top	AB IP Logged

grrun

God Member

Offline

WaterandWastewa
ter.Com is the best!

Posts: 3526
Pekin, IL
Gender: male

Company or Organization: Freelance Environmental Engine

Re: very saline (170 g/l CacL2) feed
Reply #4 - Jun 19^th, 2012, 2:35pm

Even if you could remove most of the calcium (possibly by adding sodium carbonate), you would still have the chlorides which would be pretty corrosive for process water. I don't think that ion exchange would be practical or economical.

What kind of process would recycle this concentrated corrosive brine as process water?

grrun

IP Logged

Alin

YaBB Newbies

Offline

I love Water and
Wastewater.com

Posts: 4
Saskatoon
Gender: male

Company or Organization: TetraTech WEI

Re: very saline (170 g/l CacL2) feed
Reply #5 - Jun 19^th, 2012, 2:46pm

The brine could not be recycled as it is due to high chlorides and calcium. There are few options to reduce their content (probably something as two processes in series, like high ph lime followed by RO). The main target is not the recovering of water but reducing the volume of final waste.
The crystallization of CaCl2 is not really an option as the solids would have to go through a gel phase that can cause big operational problems

IP Logged

Pages: 1

Send Topic

‹ Previous Topic | Next Topic ›