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Table 2

Energy consumption for air supply: comparison between traditional and fuzzy controller over two consecutive months for two years in a row

Traditional controllerFuzzy controller
CODin [kg/d] 23,025 29,953 
23,737 27,328 
CODremoved [kg/d] 20,604 28,070 
20,304 25,818 
Treated flow rate [m3/d] 75,315 97,130 
79,572 83,278 
Energy consumption [kWh/d] 12,589 8,785 
11,705 9,159 
Specific energy consumption [kWh/(p.e. × y)](*) 22 12 
20 13 
Specific energy consumption [kWh/m30.17 0.09 
0.15 0.11 
Specific energy consumption [kWh/kgCODremoved0.61 0.31 
0.58 0.35 
Traditional controllerFuzzy controller
CODin [kg/d] 23,025 29,953 
23,737 27,328 
CODremoved [kg/d] 20,604 28,070 
20,304 25,818 
Treated flow rate [m3/d] 75,315 97,130 
79,572 83,278 
Energy consumption [kWh/d] 12,589 8,785 
11,705 9,159 
Specific energy consumption [kWh/(p.e. × y)](*) 22 12 
20 13 
Specific energy consumption [kWh/m30.17 0.09 
0.15 0.11 
Specific energy consumption [kWh/kgCODremoved0.61 0.31 
0.58 0.35 

Average COD mass loadings over the observation period are shown. Daily measurements were carried out (flowrate volume and COD analysis on 24 hour composite samples).

(*)assumed daily per-capita COD production = 110 g/(p.e.*d).

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