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Table 2

Mean percentage nutrient removal results and mean percentage algal biomass increases during HRAP trials throughout the experimental period

 AutumnWinterSpringSummerAnnual
Nitrate and nitrite (mg/L) 4% −83% 3% −11% −6% 
Orthophosphate (mg/L) 15% 3% 53% 57% 32% 
Ammonia (mg/L) 68% 56% 97% 65% 71% 
Total nitrogen (mg/L) 45% 34% 84% 26% 64% 
Total phosphorus (mg/L) 21% 5% 60% 61% 37% 
Dried biomass (mg/L) 215% 160% 399% 299% 274% 
750 nm 269% 237% 513% 267% 330% 
680 nm 245% 198% 483% 256% 302% 
440 nm 216% 149% 397% 223% 252% 
 AutumnWinterSpringSummerAnnual
Nitrate and nitrite (mg/L) 4% −83% 3% −11% −6% 
Orthophosphate (mg/L) 15% 3% 53% 57% 32% 
Ammonia (mg/L) 68% 56% 97% 65% 71% 
Total nitrogen (mg/L) 45% 34% 84% 26% 64% 
Total phosphorus (mg/L) 21% 5% 60% 61% 37% 
Dried biomass (mg/L) 215% 160% 399% 299% 274% 
750 nm 269% 237% 513% 267% 330% 
680 nm 245% 198% 483% 256% 302% 
440 nm 216% 149% 397% 223% 252% 
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