Prime Archives in Chemical EngineeringAssessement of Bio-fertilizer Quality of Anaerobic Digestion of Watermelon Peels and Cow DungDOI: 10.37247/PACMENG.1.2020.4DownloadAssessement-of-Bio-fertilizer-Quality-of-Anaerobic-Digestion-of-Watermelon-Peels-and-Cow-Dung