Effect of Ozonation and Sonication on Biochemical Methane Potential of Biosludge from Textile Mill Effluent

The aim of this study was to justify the method to determine biochemical methane potential (BMP) of biosludges and investigate the effect of ozonation and sonication on the biosludge from textile mill effluent to its biodegradability and toxicity. This study revealed that the exented anaerobic toxicity assay at a chemical oxygen demand (COD) concentration in the assay of about 1,500 mg/L was the appropiate technique to determine BMP of the biosludge. Moreover, it was found that the biodegradability of biosludge was satisfactorily increased by both of ozonation and sonication. The use of ozone dose of 0.005 g O₃/g COD and 0.01 O₃/g COD increased the biodegradability from 62% to 69% and 76%, respectively. While for sonication on frequency 51 kHz ±6%, 120 W for 30 and 60 min increased the biodegradability from 62% to 68% and 73%, respectively.