Two anaerobic sequencing batch reactors (ASBR) were inoculated with anaerobically digested sludge. The reactor A (fed with polyquaternary ammonium salt) was compared with the reactor B (control) in order to contrast the development of granular sludge. Since start-up, the polyquaternary ammonium salt was added into the reactor A at interval of once per 2 d, and the mass ratio of polyquaternary ammonium salt to sludge was 1.6 mg/g. The results show that the avenge diameter of granular sludge m the reactor A is 0.72 mm within 73 d, reducing granulation times by approximately 25 d compared with the reactor B.The COD loading rate achieves 10g/(L·d) in the reactor A after start-up for 56 d, and the avenge diameter of granular sludge is bigger than the reactor B (0.55 mm). The granular sludge has higher methanogenic activity in the reactor A. Therefore adding polyquaternary ammonium salt into the ASBR can effectively enhance granulation.%厌氧序批式反应器(ASBR)初次启动用厌氧消化污泥接种,比较了投加聚季铵盐(A柱)与空白对照(B柱)2个反应器的颗粒污泥形成过程.启动后以每隔2 d投加1次的投加方式向反应器中不断补充聚季铵盐,聚季铵盐投加质量与污泥质量之比取1.6 mg/g.结果表明,A柱颗粒污泥平均粒径达到0.72mm仅需73 d,比B柱提前了25 d.A柱在启动56 d后COD负荷达到10g/(L·d),形成的颗粒污泥平均粒径大于B柱(0.55 mm),产甲烷活性也较高.所以投加聚季铵盐能有效促进污泥颗粒化进程.
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