Volatile fatty acid VFA measurement

The most accurate way to monitor Volatile Fatty Acids (VFA) that can cause odor/odour problems in the finished sheet is through the use of gas chromatography (GQ. GC can measure individual VFA in water or paper samples. The analysis includes measurements of acetic, propionic, and butyric acids. These three acids typically account for 98% of VFA in process water samples containing high VFA levels. If there is a need to measure other VFA (e.g. pentanoic acid) this can be done for an additional charge. Before a sample is sent for analysis, it is recommended that the sample be preserved by acidification to pH 2-3 to prevent further VFA production in transit. 

Safe handling of biocides. All chemicals should be handled cautiously (it is prudent to minimise all chemical exposures), but biocides require special caution because they are designed to be toxic to living organisms. 

Bioddes in the United States have gone through a long registration process with the Environmental Protection Agency. As part of biocide registration, a very specific label is developed. Included on this label are statements regarding  

All biocide users should be well informed regarding safe handling, storage and feeding of these products. Make sure that proper safety equipment is used when feeding, and that eyewash stations and showers are available. Make sure bulk tanks are properly labelled. A Material Safety Data Sheet (MSDS) should be kept with the product at all times. The MSDS explains how to handle the product and what to do in case of an accident. The Nalco Alert telephone number should also be posted with the MSDS. Additionally, registration labels should be kept on storage containers at all times. 

Never eat or smoke when working with biocides. 

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