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Calculation of energy usage by all the equipment is carried out after the analysis on the causes of the increase of energy usage is done. The calculation is based on the design of operating hours multiplied by the power rating of the equipment.
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1
Table 1 shows the electricity consumption of the individual units.
Table 1

Evaluation of equipment electrical consumption by design

No.Unit/Equipment nameElectricity consumption, kWh/dayPercentage of energy consumption, %
Blower 9,061.29 0.44 
Aerator 5,616.74 0.27 
Return sludge pump 1,949.13 0.09 
Auto. feed water supply unit 1,831.94 0.09 
No. 3 anoxic tank mixer 766.11 0.04 
Digested sludge mixer 484.35 0.02 
No. 1 anoxic tank mixer 383.13 0.02 
Secondary clarifier sludge collector 272.20 0.01 
Sludge feed pump for dewatering 204.39 0.01 
10 Sludge cake conveyor 179.76 0.01 
No.Unit/Equipment nameElectricity consumption, kWh/dayPercentage of energy consumption, %
Blower 9,061.29 0.44 
Aerator 5,616.74 0.27 
Return sludge pump 1,949.13 0.09 
Auto. feed water supply unit 1,831.94 0.09 
No. 3 anoxic tank mixer 766.11 0.04 
Digested sludge mixer 484.35 0.02 
No. 1 anoxic tank mixer 383.13 0.02 
Secondary clarifier sludge collector 272.20 0.01 
Sludge feed pump for dewatering 204.39 0.01 
10 Sludge cake conveyor 179.76 0.01 
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