Sludge treatment method and apparatus thereof and application to wastewater bio-treatment

摘要

A sludge treatment method and an apparatus thereof are provided. The sludge treatment method comprises the following steps: (1) blending a sludge feed from wastewater bio-treatment process and a first mixture comprising sludge and water to obtain a second mixture; (2) aerating the second mixture to obtain a third mixture; (3) treating the third mixture under anoxic conditions to obtain a fourth mixture; (4) separating the fourth mixture to obtain a supernatant liquid and a first concentration mixture; and (5) discharging the supernatant liquid and returning at least some part of the first concentration mixture to the step of (1) using as the first mixture; wherein, the amount of the sludge in the first concentration mixture not returned to the step of (1) being less than that of the sludge feed. The application of the sludge treatment method to wastewater bio-treatment is provided. The sludge treatment method can stably operate for a long period of time without the need of discharging sludge.