纯种氨氧化细菌Comamonas aquatic LNL3的固定化及短程硝化性能研究

采用辐射技术,以共聚物Poly(HEA)-Poly(HEMA)为载体将纯种AOB-Comamonas aquaticLNL3固定化,研究了固定化纯种AOB在不同温度、pH、DO、FA条件下的短程硝化性能.结果表明,纯种AOB-Comamonas aquaticLNL3具有短程硝化性能,固定化纯种AOB-Comamonas aquaticLNL3的短程硝化反应的最佳温度、pH、DO、FA分别为30℃、8.5、4.03 mg/L和9 mg/L,相应的氨氮去除率和亚硝化率分别为93.52%、94.73%;79.74%、94.67%;91.17%、94.66%和90%、94.4%,FA对短程硝化亚硝化率影响不大.

Immobilized Ammonia-oxidizing Bacteria Comamonas aquatic LNL3 and Its Partial Nitrification Characterization

A new kind of ammonia-oxidizing bacteria (AOB)-Comamonas aquatic LNL_3 was screened out and immobilized by Poly (HEA)-Poly (HEMA) copolymer carrier using irradiation techniques. Four kinds of impact factors on short-cut nitrification, including temperature, pH,DO and free ammonia (FA) concentration had been investigated. The result showed that AOB-Comamonas aquatic LNL_3 had short-cut nitrification capability and the optimal temperature, pH,DO and FA concentration were 30℃,8.5,4.03 mg/L and 9 mg/L respectively. Corresponding to above results, ammonia nitrogen removal rate and short-cut nitrification efficiency were 93.52%,94.73%;79.74%,94.67%;91.17%,94.66% and 90%,94.4% respectively.