Characteristics and mechanism of hollow anammox granular sludge with different settling property

The characteristics and mechanism of hollow Anammox granular sludge with different settling property were investigated through the analysis of morphology, structure and microbial community. According to settling property, the granules from an anammox continuous stirred-tank reactor were classified into settling granules (SG) benign floating granules (BFG) and malignant floating granules (MFG).