Syaichurrozi, Iqbal, Sarto Sarto, Wahyudi Budi Sediawan, and Muslikhin Hidayat. 2023. “Effect of Fe Addition on Anaerobic Digestion Process in Treating Vinasse: Experimental and Kinetic Studies”. Periodica Polytechnica Chemical Engineering 67 (1):127-40. https://doi.org/10.3311/PPch.20611.