Peningkatan Persentase Metana (CH4) dari Biogas Kotoran Domba melalui Purifikasi menggunakan CaO-Based Bubble Column

Abstract

Biogas merupakan salah satu energi terbarukan yang dihasilkan melalui fermentasi anaerobik bahan organik. Penelitian ini bertujuan untuk meningkatkan persentase metana (CH4) pada biogas hasil fermentasi kotoran domba dengan penambahan molase menggunakan metode purifikasi CaO-based bubble column. Hasil kalibrasi sensor menunjukkan nilai R² = 0,9928 untuk sensor MQ-4 dan R² = 0,9745 untuk sensor MQ-135. Variasi rasio substrat antara kotoran domba dan molase berpengaruh signifikan terhadap produksi volume dan persentase CH4 yang dihasilkan. Rasio optimal terdapat pada perlakuan D2 (90:10), total produksi volume mencapai 18.921 mL dan konsentrasi CH4 tertinggi sebesar 49,31 %vol. Proses purifikasi dilakukan pada sampel D2 menggunakan metode CaO-based bubble column dengan variasi massa CaO 300 gr. Proses purifikasi menggunakan CaO-based bubble column terbukti efektif, dengan rata-rata peningkatan persentase CH4 tertinggi sebesar 40,66%.

Biogas is one of the renewable energy produced through anaerobic fermentation of organic materials. This study aims to increase the percentage of methane (CH4) in biogas from sheep manure fermentation with the addition of molasses using the CaO-based bubble column purification method. The sensor calibration results showed a value of R² = 0.9928 for the MQ-4 sensor and R² = 0.9745 for the MQ-135 sensor. The variation of substrate ratio between sheep manure and molasses significantly affected the volume production and percentage of CH4 produced. The optimal ratio was found in treatment D2 (90:10), the total volume production reached 18,921 mL and the highest CH4 concentration was 49.31 %vol. Purification process was carried out on sample D2 using CaO-based bubble column method with CaO mass variation of 300 gr. The purification process using CaO-based bubble column proved to be effective, with the highest average increase in CH4 percentage of 40.66%.