Decentralized wastewater treatment performance evaluation based on chemical and physical parameters at Bantul Regency, YogyakartaSuphia Rahmawati, Andik Yulianto and Ahmad Traju Pangentas WijayaningratMATEC Web Conf., 280 (2019) 03006DOI: https://doi.org/10.1051/matecconf/201928003006