METHOD AND SYSTEM FOR TREAT ORGANIC WASTEWATER

摘要

A method and a system capable of accelerating solubilization of excess sludge in the treatment of excess sludge using ultrasonic wave. The method for treating excess sludge produced from a process for treating organic wastewater comprises an biological treatment process and a solid-liquid separation process, characterized in that the excess sludge is partially or entirely solubilized through a combination with at least one of ultrasonic treatment, acid fermentation treatment, chemical treatment and thermal treatment, and the solubilized sludge is returned to the biological treatment process.