Polyacrylamide (PAM) Flocculent Dissolution Rate Testing for An Experimental Passive Dosing System.

摘要

Washington State Department of Transportation (WSDOT) is considering the use of Polyacrylamide (PAM) flocculent to reduce stormwater runoff turbidity at highway construction sites. This research project conducted a testing program to determine the dissolution rates of PAM introduced to simulated stormwater flow by using an experimental geotextile tea-bag dosing system. The testing program simulated tea-bags placed in 2 configurations: (1) suspended in a pipe culvert, and (2) placed in a standard catch-basin insert. The flume in the Saint Martin's College School of Engineering Hydraulics Laboratory was used to conduct a full-scale simulation of flow regimes for these 2 configurations. Five types of geotextile fabric, five types of PAM flocculent, and ten configurations of tea-bag placement were tested. Empirical relationships between the dissolution rate and flow were found by regressing the test results.