This slide presentation outlines a study on water quality sensor responses to injected contaminants in a chloraminated pipe loop. Chloraminated research consisted of: all previous sensor response studies were
performed in a chlorinated pipe loop;
a subset of those contaminants were
injected into a chloraminated pipe loop;
chloramines were made by adding
chlorine and ammonia to Cincinnati tap
water (4:1-5:1 Cl2:N ratio);
total chlorine was maintained at
approximately 2.0 mg/L at pH 8.4 in the
loop; and,
grab samples indicated total chlorine was
mostly monochloramine. On-line standard water
quality test parameters are given, along with the injected contaminants (1-4 mg/L); contaminant injection; free chlorine vs. chloramines:
nicotine, wastewater, Round-Up (Glyphosate), Real Kill (Malathion), TOC in both systems: wastewater, Round-Up (Glyphosate), Real Kill (Malathion). Results indicated that: TOC was the best indicator of
contamination in chloraminated water;
largest response to the most contaminants;
total chlorine in a chloraminated
system is not a good trigger parameter; and,
emphasizes the importance of TOC in
on-line water quality monitoring. Includes figures.