施氏假单胞菌菌株的脱氮特性

摘要

对一株具有异养硝化-好氧反硝化功能的施氏假单胞菌(Pseudomonas stutzeri)菌株WIT-1进行研究,初步探讨了菌株WIT-1的脱硝态氮能力、对硝态氮的最高耐受性及在未灭菌生活污水的实际脱氨氮效果.结果表明,在初始化学需氧量(Chemical Oxygen Demand,COD)为500mg/L时,48h对硝态氮的去除率为96.38％.在相同COD条件下,菌株WIT-1对脱硝态氮耐受性为800mg/L.当菌株WIT-1的接种量为2％时,12h对生活污水中的氨氮去除率为32.741％.当初始COD含量增加到500mg/L或者菌株的接种量提高为8％时,12h对生活污水中的氨氮去除率分别为52.765％和100％.但48h对氨氮的去除率都只有20％左右.%The P. stutzeri strain named as WTT-1 with the ability of heterotrophic nitrification and aerobic deni-trification was studied for its characteristics of nitrogen removal. The maximum tolerance of removing nitrate,nitrate removing and its capability of removing ammonia for non - sterilized sanitary sewage of WIT-1 were investigated. The results showed that initiating chemical oxygen demand (COD) concentration was 500 mg/L,the removal rate of nitrate was 96.38% in 48 h. At the same condition of COD,the strain WIT-1 maximum tolerance of removed nitrate concentration was 800 mg/L. When the amount of inoculation of the strain WIT-l was 2% , the removal rate of ammonia was 32. 741% in 12 h. When the initial COD concentration was 500 mg/L or the inoculation was improved to 8% ,the removal rate of ammonia was 52.765% and 100% in 12 h, respectively. However,the removal rate of ammonia was only about 20% in 48 h.