BIOGAS GENERATION FROM DEGRADATION OF WASTE MUNICIPAL ACTIVATED SLUDGE USING ANAEROBIC DIGESTION AND ULTRASONIC PRETREATMENT

Biological treatment is used widely in treating the wastewater. However, biological treatment process will produce a large amount of waste sludge which is not favourable to the environment. The waste sludge need to be stabilized before being dispose. Anaerobic digestion process has been proposed as the efficient method in treating sludge, and at the same time producing biogas.
This study focused on the biogas production based on the optimum condition for the anaerobic digestion and the usage of ultrasonic pretreatment. Anaerobic digestion was dependent on some factors for its efficiency. In this research, the factor of temperature was studied in its effect on the anaerobic digestion and biogas production. Two temperature range of anaerobic digestion was studied, which were Thermophilic (49 – 57 °C) and Mesophilic (30 – 38 °C).