Novita, E., Pradana, H.A., Wahyuningsih, S., Mahraenanto, B., sujarwo, M.W. and Hafidz, M. salman A. 2019. ANAEROBIC DIGESTER VARIATION FOR BIOGAS PRODUCTION ON COFFEE WASTEWATER TREATMENT. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering). 8, 3 (Sep. 2019), 164–174. DOI:https://doi.org/10.23960/jtep-l.v8i3.164-174.