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Sunday, October 14, 2007

Ineffective biocide programs jeopardize worker safety, damage mill equipment Pulp & Paper - Find Articles

Ineffective biocide programs jeopardize worker safety, damage mill equipment Pulp & Paper - Find Articles: "Ineffective biocide programs jeopardize worker safety, damage mill equipment Pulp & Paper, Nov 2003 by Robertson, Linda Scrimping :
Biocides can cause off-spec production and even contribute to human fatality, but proper testing, such as a rigorous anaerobic audit, can decrease risks and pinpoint problems Paper mills are under enormous pressure to cut costs in order to stay competitive.


Mills have responded by undergoing water system closure, reducing spending on biocide programs, and, in some cases, lowering water system temperatures to save energy. How do all of these factors affect the microbes growing on the machines?

Has this, in turn, lead to worker safety issues and even the longevity of equipment and materials on the paper machine?

And, if so, how? The additives and fibers used in the papermaking process support the growth of a wide variety of microorganisms.

Papermakers' concern with microbial contamination usually focuses on visible machine microbial deposits that form holes or sheet defects and lead to runnability problems.

These can cause sheet breaks that force the machine to shut down for unscheduled washups or boilouts.

Other costly problems
caused by microbes are overlooked
because they tend to be
difficult to identify.


For example, a drop in pH For example, a drop in pH may signal spoilage of additives or pulp and the potential for foul odors. This article explores the impacts of microbial contamination beyond those that impact paper quality and runnability."


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  • The Tekes CACTUS report in Finnish.
LINDA ROBERTSON is principal microbiologist for Ondeo Nalco Company, Naperville, Ill.


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