从活性污泥中筛选出一株能产高效絮凝剂的芽孢杆菌，对该菌产生的微生物絮凝剂进行了絮凝条 件及废水絮凝实验研究。结果表明，微生物絮凝剂最佳絮凝条件为：原水pH值7.0以上；助凝剂CaCl₂ （1％ 浓度）适宜投加量为 5.0 ％ ；发酵液的适宜投加量为0.2％ ；发酵液较好的离心条件为n ＝ 4000转/min， t ＝ 30 min。在最佳絮凝条件下，该菌产生的微生物絮凝剂对多种废水净化效果明显。

One strain of Bacillus SP. from the activated sludge is able to produce a stable and efficient bio- flocculation. The flocculation properties and application of this microbial flocculants in wastewater treatment are studied. The results show that the optimum flocculation can be reached in conditions as follows: above pH 7.0, the dosage of coagulation aid CaCl₂ is 5.0 % , the flocculants dosage is 0.2 % , and the centrifugal condition of flocculants broth is 4 000 r/min min and last for 30 min. In the optimum flocculation condition the strain boasts obvious coagulation efficiency in wastewater treatment with produced bio- flocculation.