Study on "relative bioflocculation parameter BF/BF0 "as the indicatrix of enhancing anaerobic granulation with flocculants
比生物絮凝因子作为絮凝剂促进厌氧污泥颗粒化指标的研究

The effect of bioflocculant MBF21 and cationic PAM with intermittent addition on anaerobic sludge bioflocculation in the UASB reactor was studied, compared with the reactor without any flocculants addition. Moreover, the connection between relative bioflocculant parameter BF/BF0 and the size of anaerobic granule was explored. The experimental results showed that the BF/BF0 value of sludge in the bioflocculant-added reactor, cationic PAM-added reactor and control reactor increased to 42.65, 40.45 and 21.89, respectively. The BF/BF0 values of sludge in the bioflocculant-added reactor and the cationic PAM-added reactor increased by 94.8 % and 84.8 % compared with the control reactor. The diameter of granules in each reactor increased to 1.04, 1.13 and 0.63 mm, respectively ; The diameter of granules in the bioflocculant-added reactor and the cationic PAM-added reactor increased by 65.1% and 79.4% compared with control reactor.