Ceramic Membranes for Protein Recovery and Salt Rejection in Wastewater from Fish Meal Production

March 22, 2013 • Filed under: News — melanie.rohr

UAA Civil Engineering professor Aaron Dotson will present his research on protein recovery from stickwater through ceramic membranes, and what it means for the Alaska fish processing industry at this week’s seminar, Friday, March 22, 2013.

Friday Seminar Series

  • What: Ceramic Membranes for Protein Recovery and Salt Rejection in Wastewater from Fish Meal Production
  • Who: Aaron Dotson, Assistant Professor UAA – Civil Engineering and Affiliate Professor UAF-WERC
  • When: 3:30-4:30 p.m., Friday, Mar. 22
  • Where: 531 Duckering

Stickwater is the bulk liquid waste product from fish meal processing plants. Stickwater is either concentrated in energy intensive multiple effect evaporators for further solids (e.g. protein) recovery or discharged directly to the marine environment. Stickwater contains total dissolved solids that consist of protein content of known market value. A ceramic membrane is a unit process that could be incorporated into existing fish meal processing plants prior to direct fired rotary drum dryers, potentially resulting in increased solids recovery and reduced energy consumption. The objective of this research was to assess the dissolved solids recovery and permeate flux performance of stickwater through tubular ceramic membranes with nominal pore sizes ranging from 50kDa to 1.4μm. In pursuit of this objective bench-scale critical flux analysis using a membrane pilot skid located in the Environmental Quality Laboratory for Natural and Engineered Systems (EQLNES) on the University of Alaska Anchorage campus was performed. Furthermore, the fluid was evaluated for rheological character as it was hypothesized the stickwater is a non-newtonian fluid. This presentation will present the results and analysis to date of this work and provide insight into the application this process from a holistic view in the context of the Alaska fish processing industry.