background: sulfur compounds must be removed from petroleum because they contribute to environmental pollution. a strong alkaline solution such as caustic soda is used to remove these compounds. this spent caustic has high values for chemical oxygen demand (cod) concentration, ph and total sulfur. in this study, the regeneration and treatment methodology of sulfidic spent caustic was investigat...

enzymatic extract preparation from pseudomonas aeruginosa km110 under accession no. hq730879 with lipase activity (0.3 u/ml), was used to perform enzymatic hydrolysis pretreatment of a synthetic dairy wastewater with 1000 mg/l total fat content. the pretreatment was optimized for 48 h hydrolysis time, at 45æ% c with 10% v/v enzymatic extract. the biological treatment of synthetic dairy wastewat...