Use of Chitosan Lactate to Enhance Media Filtration and Meet Benchmarks at an Industrial Facility

This presentation will discuss the coagulant chitosan lactate, its benefits, and its effectiveness at removing over 90 percent of influent copper and zinc.

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Media filtration had been implemented for years at a 20-acre boatyard facility in Port Townsend Washington, but the treated stormwater still regularly contained copper and zinc concentrations above the permit benchmark values. With the problem identified as ineffective filtration of fine particulates, a low-cost coagulation pretreatment system was designed and installed. The coagulant employed was chitosan lactate, a passive-release gel. The chitosan lactate virtually eliminates the chance for overdosing, simplifies system operation, and greatly reduces system cost versus an active-dosed liquid coagulant system. Since addition of chitosan lactate, media filtration has effectively removed over 90 percent of influent copper and zinc, and the treated stormwater has consistently met permit benchmark values.

About Instructors

Joe Kalmar

Principal Engineer, Landau Associates, Inc.

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Course Includes

  • 1 Lesson
  • Course Certificate