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RE: Industrial Water Reuse

Yellowing typically occurs in whites during bleaching if chlorine dosing is
incorrect.  There is a possibility that if the reused water has a high
residual chlorine content it could be causing a change in the color of the
textiles.  Additionally, residual chlorine at high temperature and pH below
10 can degrade fabric quickly.  The residual chlorine level should be
tested.  Dosing sodium thiosulfate can eliminate the residual chlorine.

Can you provide more information on the problem. 

I am not sure if I understand what you mean when you say the textiles has a
life expectancy of 5-10 days with reused water and 45 - 50 days with City
water.  Can you elaborate? What kind of textiles are you refering to? When
you say the life expectancy is this actual or is this number to be
extrapolated for the shipped product?

John Burke
3 Hillcrest Cr.
Lexington, NC 27292
Phone: 336-249-1480
Fax: 336-238-1211
Email: john_burke@p2pays.org
Web: http://www.p2pays.org

> -----Original Message-----
> From:	Denise Rayborn [SMTP:draybor@max.state.ia.us]
> Sent:	Tuesday, December 22, 1998 6:23 PM
> To:	p2tech@great-lakes.net
> Subject:	Industrial Water Reuse
> I'm searching for information to assist in a industrial water reuse
> issue.  Here are the bare basics of the situation:
> Water is being reused for product testing.  Textiles in this process
> water experience a shortened life expectancy of 5 - 10 days with the
> treated, recirculated water versus 45 - 50 days when city water is used
> for testing.  Also, the textiles are experiencing a color change during
> the testing (from white to orange).
> Water analysis and comparison has not produced significant revelations.
> I've searched the P2TECH archives and other resources to no avail.  Any
> suggestions for more info?
> Thanks and Happy Holidays!
> Denise Rayborn
> Environmental Specialist, WRAP
> Iowa Department of Natural Resources
> 502 E. 9th St.
> Des Moines, IA 50319-0034
> office: 515.281.8499
> fax:     515.281.8895
> email:  draybor@max.state.ia.us