Kebutuhan listrik di Indonesia akan terus tumbuh dan pemerintah telah menetapkan kebijakan energi nasional yaitu target bauran energi nasional untuk EBT (Energi Baru Terbarukan) pada tahun 2025 adalah sebesar 23 %. Salah satu program PLN untuk mencapai target bauran energi tersebut adalah melakukan co-firing PLTU dengan biomassa. PLTU Air Anyir 2 x 30 MW telah melakukan pengujian co-firing dengan
persentase campuran woodchips 5% untuk mengetahui pengaruh co-firing pada keandalan dan parameter utama PLTU Batubara serta mendapatkan gambaran implementasi Co-firing yang meliputi aspek evaluasi teknis operasional, evaluasi specific fuel consumtion (SFC) dan evaluasi lingkungan. Hasil pengujian bahan bakar menunjukkan bahwa bahan bakar campuran memiliki nilai kalor 3.871 kCal/kg dengan total moisture 36,97%, kandungan abu 4,17%, volatile matter 31,84% dan kandungan sulphur 0,15%. Berdasarkan pengamatan parameter operasi secara umum tidak mengalami perubahan saat operasi co-firing. Sementara untuk bahan bakar co-firing
tergolong Cl Induced minor dengan nilai B/A ratio rendah dan memiliki risiko slagging rendah, serta medium terhadap fouling. Berdasarkan perhitungan heat rate metode input
output nilai NPHR coal firing 3.072,01 kCal/kWh, nilai NPHR co-firing yaitu 3.061,13 kCal/kWh. Sementara SFC coal firing adalah 0,729 kg/kWh dan SFC co-firing adalah 0,728 kg/kWh. Emisi SO2 rata-rata menunjukkan kecenderungan turun dari 424 mg/Nm3 pada pengujian operasi 100% batubara menjadi 236 mg/Nm3 pada pengujian co-firing 5%. Emisi NOx rata-rata menunjukkan kecenderungan turun dari 183 mg/Nm3 pada
pengujian operasi 100% batubara menjadi 152,2 mg/Nm3 pada pengujian co-firing 5%, sedangkan baku mutu emisi KLHK sebesar 550 mg/Nm3.

The need for electricity in Indonesia will continue to grow and the government has established a national energy policy, namely the national energy mix target for EBT (New, Renewable Energy) in 2025 is 23%. One of PLN's programs to achieve the energy mix target is co-firing PLTU with biomass. PLTU Air Anyir 2 x 30 MW has conducted a co-firing test with a 5% percentage of woodchips mixture to determine the effect of co-firing on the reliability and main parameters of the coal-fired power plant and obtain an overview of the implementation of Co-firing which includes aspects of operational technical evaluation, evaluation of specific fuel consumption (SFC) and environmental evaluation. The results of the fuel test showed that the mixed fuel had a calorific value of 3,871 kCal/kg with a total moisture content of 36.97%, ash content of 4.17%, volatile matter of 31.84% and sulfur content of 0.15%. Based on observations, the operating parameters generally did not change during the co-firing operation. Meanwhile, co-firing fuel is classified as Cl Induced minor with a low B/A ratio and has a low slagging risk, as well as medium to fouling. Based on the calculation of the heat rate by the input-output method, the NPHR for coal firing was 3,072.01 kCal/kWh, the NPHR for co-firing was 3,061.13 kCal/kWh. While SFC coal firing is 0.729 kg/kWh and SFC co-firing is 0.728 kg/kWh. The average SO2 emission tends to decrease from 424 mg/Nm3 at 100% coal operation test to 236 mg/Nm3 at 5% co-firing test. Average NOx emissions show a downward trend from 183 mg/Nm3 in the 100% coal operation test to 152.2 mg/Nm3 in the 5% co-firing test, while the KLHK's emission quality standard is 550 mg/Nm3.