In this study, in order to reduce the electricity consumption / cost of the Karaman Wastewater Treatment plant, which has the highest flow and electricity consumption in Sakarya, the arrangements that can be made during the working hours of the treatment plant and the generation of electricity by the MHP that can be installed between the outlet of the facility and the discharge point of the wastewater are examined. A change of 17% in the electricity bill costs and up to 50% in the flow rates were observed. Wastewater treatment plant projects keep their capacities high, considering the needs of the next 20-30 years. Based on these results, it is determined that if the electricity consumption amounts in the peak time interval where the unit price of electricity is high is shifted to day and night time zones, the electricity costs of the facilities will decrease. In addition, it has been shown that a part of its own electricity consumption will be met by the micro hydro power plant to be installed between the outlet of the facility and the discharge point.