Fluidized sulfur biofilters have
been researched at the lab scale, with Kim et al. (2004) showing
higher N removal rates from fluidized sulfur beds than packed sulfur
beds. This was due to the absence of clogging and good nitrate
transfer to the sulfur surface in the fluidized system. In previous
work, Christianson and Summerfelt(2014) determined fluidization
velocities of commercially-available sulfur flakes, grains, and powder,
and concluded the grains provided the most realistic option for
full-scale testing of a fluidized sulfur-based denitrification biofilter.
The objective ofthis work was to assess the nitrate reduction potential
of fluidized sulfur-based biofilters for treatment of aquaculture
wastewater.