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A Universal Nutrient Application Strategy For The Bioremediation Of Oil-Polluted Beaches
Citation:
Li, H., Q. Zhao, M. C. Boufadel, AND A. D. Venosa. A Universal Nutrient Application Strategy For The Bioremediation Of Oil-Polluted Beaches. C. Sheppard (ed.), MARINE POLLUTION BULLETIN. Elsevier Science Ltd, New York, NY, 54(8):1146-1161, (2007).
Impact/Purpose:
To determine the nutrient injection strategy, through a perforated pipe at the high tide line and to estimate the optimal injection flow rate of nutrient solution.
Description:
Biostimulation by nutrient application is a viable technology for restoring oil-contaminated beaches. Maximizing the nutrient residence time is key for achieving a rapid cost-effective cleanup. We considered the nutrient injection strategy through a perforated pipe at the high tide line and we simulated numerically beach hydraulics, which allowed us to estimate the optimal injection flow rate of nutrient solution. Our results indicate that the optimal application is one that starts following the falling high tide and lasts for half tidal cycle. The saturated wet-front of the nutrient solution on the beach surface would move seaward with the same speed of the fallling tide keeping a constant distance with the tide line. The numerical results were generalized to beaches of wide ranges of hydraulic and tidal properties using a novel dimensionless formulation for water flow and solute transport in porous media. Nomographs were presented to provide the flow rate based on four parameters: The beach slope and hydraulic conductivity, and tidal amplitude and period.
URLs/Downloads:
A Universal Nutrient Application Strategy For The Bioremediation Of Oil-Polluted Beaches