Nitrogen dynamics and removal by algal turf scrubber under high ammonia and organic matter loading in a recirculating aquaculture system
Abstract
102 words
High total ammonia nitrogen (TAN) concentrations were
introduced to an Algal Turf Scrubber developed under loadings
of Clarius gariepinus recirculating aquaculture system effluent
to determine its potential and dynamics of TAN removal. TAN
removal rates were not affected at total suspended solids
concentration of up to 0.04g TSS/l (P > 0.05). TAN removal
rates 0.93-0.99g TAN/m²/d were recorded at loading rates
between 3.76 and 3.81 g TAN/m²/d. TAN removal exhibited
½ order kinetics between 1.6 to 2.3mg/l TAN concentrations.
TAN removal increased with TAN loading and hydraulic surface
loading. In addition, TAN removal was higher than in fluidized
bed and trickling filters.
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