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Re: Brine reclamation



As brine/chlorides is a common problem, Jan's request prompts me to ask
the following:

Does anyone have (non-vendor) fact sheets or case studies for the
non-chemical (i.e. chemical free) water treatment technologies for
removing hardness?

Are there any hypochlorite or mixed oxidant generating systems that use
some of the waste brine from water softening to disinfect the softened
water?




>>> <jhygnstr@unlnotes.unl.edu> 06/20/02 12:44PM >>>
Hello! Can anyone help with the following? If you have ideas, you can
reply
to me or directly to Mike at mschultes7@hotmail.com 

I am looking for previous case studies, problems or complaints with
the
following brine reclamation idea, any data that someone has available,
and
any other fascinating information. I have searched google and the web
for
hours with limited success, and enlisted the aid of the P2RIC research
librarian.  Most of my findings were articles from vendors.  The P2Tech
and
EPA archives have also been searched.

Project Overview
We will perform tests on the existing water softener systems at two
industries for approximately two weeks.  After this period, the new
brine
reclamation system will be installed and the tests will resume for
another
two weeks.  The test results should show that the brine reclamation
system
reduced the amount of salt used by about 35%.  This reduces not only
salt
costs, but also the amount of water used during regeneration.  The
return
on investment of the brine reclamation system should be less than 24
months.

Brine Reclamation
When a water softener regenerates it uses salt to replace the hardness
that
has been captured by the resin.  In a water softener system, the rapid
rinse water used for regeneration is sent to the sanitary sewer.  The
brine
reclamation system consists of a device that monitors the regeneration
water and diverts the portion of the rapid rinse water that can be
used
again back to the brine tank.  This process leads to the salt and
water
savings stated above.

Monitored Samples
We are going to take samples and monitor the influent water (hard
water),
the effluent water (soft water), the brine effluent (wastewater), the
brine
in the brine tank, and the amount of salt used.  The volumes used will
be
recorded and the samples will be tested for water quality.

Wanted Information
We are looking for previous case studies, problems or complaints with
this
brine reclamation idea, any data that someone has available, and any
other
fascinating information.

Contact Information
Project Intern:         Michael Schultes
E-mail:        mschultes7@hotmail.com 

Jan Hygnstrom, Extension Project Manager
247 LW Chase Hall
University of Nebraska-Lincoln
Lincoln, NE 68583-0726

Phone: 402-472-9614
Fax: 402-472-6338


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