Hutagalung, Johannes Martua, Karina Marwahati, Lia Muliati, Usamah Rizqi Alfian, and Retno Prasongko. 2026. “Comparative Effectiveness Of Organic Waste–Based Eco-Enzyme And Commercial Bio-Bacterial Agents In Railway Toilet Wastewater Treatment”. SAINTEKS : Jurnal Sain Dan Teknik 8 (01):51-60. https://doi.org/10.37577/sainteks.v8i01.1035.