高效聚磷菌的选育及其特性研究

从鱼塘底部污泥中分离驯化得到一株高效聚磷菌株P5,采用厌氧/好氧(A/O)方式培养,在厌氧阶段3 h的最大释磷量为17 mg/L;在好氧条件下培养16 h后,P5对总磷(PO43--P)浓度为10~30 mg/L的模拟废水的除磷率均可保持在90%,COD的去除率达到82.1%。染色实验表明,P5是革兰氏阴性球杆菌,菌体内含有异染颗粒。

Study on breeding and characteristics of phosphorus accumulation organism with high capability

A strain of bacterium named P_5 with high capability of phosphorus accumulation was isolated from sludge of a fish pond.Using the culture of anaerobic/aerobic(A/O)to strain P_5,the highest amount of phosphorus release was 17 mg/L for 3 h in the anaerobic period.Under the aerobic condition.the highest rate of phosphorus removal for P_5 of simulated wastewater containing PO_4~(3-)-P of 10～30 mg/L Was about 90%and removal rate of COD was 82.1%after 16 h.The dyeing test showed that P_5 is gram-negative coccobacillus and has metachromatic granule in its cell.