The study examines the environmental performance and operational efficiency of a waste-to-energy (WTE) plant in Bantargebang, West Java, Indonesia. The plant uses moving grate incinerator (MGI) technology with a pre-treatment facility to handle municipal solid waste (MSW). Over 241 working days from January to December 2022, the plant incinerated approximately 15,451.35 tons of MSW, achieving a significant waste mass reduction of 81.52-96.50%. The pre-treatment process reduced the moisture content from 20.13% to 8.59%, enhancing the efficiency of the incineration process. The plant generated superheated steam and electricity, with a total electrical energy output of 956.04 MWh, which was used to meet the internal power demand of the plant. The flue gas emissions and ambient air quality met national standards after treatment, and the fly ash and bottom ash were found to be non-hazardous and suitable for construction materials. The study highlights the successful implementation of WTE in Bantargebang, contributing to waste reduction and environmental sustainability. However, improvements are suggested for the pre-treatment facility to prevent wet and large-sized waste from entering the incinerator, and to optimize the use of generated electricity to reduce diesel oil and electricity costs.The study examines the environmental performance and operational efficiency of a waste-to-energy (WTE) plant in Bantargebang, West Java, Indonesia. The plant uses moving grate incinerator (MGI) technology with a pre-treatment facility to handle municipal solid waste (MSW). Over 241 working days from January to December 2022, the plant incinerated approximately 15,451.35 tons of MSW, achieving a significant waste mass reduction of 81.52-96.50%. The pre-treatment process reduced the moisture content from 20.13% to 8.59%, enhancing the efficiency of the incineration process. The plant generated superheated steam and electricity, with a total electrical energy output of 956.04 MWh, which was used to meet the internal power demand of the plant. The flue gas emissions and ambient air quality met national standards after treatment, and the fly ash and bottom ash were found to be non-hazardous and suitable for construction materials. The study highlights the successful implementation of WTE in Bantargebang, contributing to waste reduction and environmental sustainability. However, improvements are suggested for the pre-treatment facility to prevent wet and large-sized waste from entering the incinerator, and to optimize the use of generated electricity to reduce diesel oil and electricity costs.