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Table 5

Model-predicted aeration energy consumption, cost savings and final effluent quality for case studies 1 and 2

Case study 1
Case study 2
Aeration energy parameterBaselineSimple measuresComplex measuresBaselineSimple measuresComplex measures
Consumption (MWh/year) 4,678 4,265 3,674 2,518 2,109 1,596 
Consumption savings (MWh/year)  413 1,004  409 922 
Maximum demand savings (kW)  47 115  47 105 
% Consumption saving  21  16 37 
% Consumption cost saving  10 23  23 41 
Carbon reduction (t/year)  409 992  405 913 
Average final effluent concentrations       
Ammonia 0.4 0.3 0.8 10 3.5 
Ortho P (mgP/l) 0.3 0.1 <0.1 0.5 0.2 <0.1 
Nitrate/Nitrite (mgN/l) 
Case study 1
Case study 2
Aeration energy parameterBaselineSimple measuresComplex measuresBaselineSimple measuresComplex measures
Consumption (MWh/year) 4,678 4,265 3,674 2,518 2,109 1,596 
Consumption savings (MWh/year)  413 1,004  409 922 
Maximum demand savings (kW)  47 115  47 105 
% Consumption saving  21  16 37 
% Consumption cost saving  10 23  23 41 
Carbon reduction (t/year)  409 992  405 913 
Average final effluent concentrations       
Ammonia 0.4 0.3 0.8 10 3.5 
Ortho P (mgP/l) 0.3 0.1 <0.1 0.5 0.2 <0.1 
Nitrate/Nitrite (mgN/l) 
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