Bergendahl, John Andrew
Braun, Isa Bar-On
Arava Institute of Environmental Studies
This project examined the efficacy of solid sodium bicarbonate as a low-cost, viable substitute for carbon dioxide gas in small- scale cyanobacterial-algal (microbial) mat agricultural wastewater treatment. Experimentation over 35 days with nitrate-rich wastewater resulted in removal efficiency rates up to 37.2% of NO3 for microbial mats treated with solid sodium bicarbonate. Reaction rate modeling determined a rate constant of 0.0166/day and Excel modeling determined a projected hydraulic residence time with increased microbial mat area for an estimated 75% removal. Recommendations include further long-term experimentation and suggestions for an initial prototype design.
Worcester Polytechnic Institute
Major Qualifying Project
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Civil and Environmental Engineering