2023 Volume 79 Issue 26 Article ID: 23-26008
An electricity demand-side management model was developed in a small-scale wastewater treatment plant (WWTP) that uses the oxidation ditch (OD) method to support an electricity load shifting by a WWTP. The model makes it possible to estimate the annual power consumption depending on the operation plan with a 30-minute resolution. We set introduction measures of photovoltaic (PV) system at the WWTP site under the condition that the ratio of PV power generation to electricity consumption by the WWTP on an annual total volume basis would be the same value. In contrast to operation plan A that replicates the current operation, plan B was designed to allocate electricity demand in OD reaction tank during the daytime, taking into account the PV generation time zone. As a result, the annual self-sufficiency rate of plan B, based on the electricity supply-demand balance at 30- minute resolution, increased from 46% to 57%, and the self-consumption rate from 44% to 54% compared to plan A.
