Pilot and Bench Scale Testing of Novel Treatment Media
Tightening stormwater regulations in the Pacific Northwest, driven by the Washington State Department of Ecology Industrial Stormwater General Permit, are spurring the development of more elaborate and novel stormwater treatment solutions. Site operations at industrial facilities create unique challenges that traditional stormwater treatment systems and available filtration medias have not been able to adequately address. In light of the complex nature of site specific stormwater characteristics, and even more complex regulatory environment, finding a balance between stormwater treatment system hydraulic performance, general site applicability and contaminant removal efficiency is paramount at industrial facilities.
The presentation will detail bench and pilot scale tests of several treatment media conducted to assist in the selection of appropriate stormwater filtration media for marine cargo, and log handling facilities, at the Ports of Tacoma and Seattle in Washington State. A discussion of performance data from bench and pilot scale testing of innovative combinations of several medias, including biochar, sand, pea gravel, bioretention soil mix, activated peat, oyster shells and granular activated carbon, will provide insight on the general performance and applicability of each media, or media combination, for a range of wide range of stormwater application rates and contaminant concentrations. The presentation will discuss site specific conditions and stormwater quality, pilot study design, testing procedures, results, and the final design and performance of a stormwater treatment system for a log handling facility.
Audience members will learn how bench scale and pilot testing, even on a tight budget, can be a useful tool for evaluating the potential for full scale treatment systems to meet permit required benchmarks for site specific conditions.