秋冬季环境下固定化氮循环细菌净化湖泊水体氮污染动态模拟

摘要

Experimental studies were carried out on the purification of eutrophic lake water by simulative dynamic experiment using immobilized nitrogen cycle bacteria. The results showed that the eutrophic water of Taihu Lake can be purified effectively as it pass through different immobilized nitrogen cycle bacteria zones. The removal efficiencies for Total N(TN), NH4+-N with immobilized nitrogen cycle bacteria were 72.4 % and 85.6 %, respectively. It was found that the immobilized nitrogen cycle bacteria also have purificatory effect on eutrophic water of Taihu lake in winter(7℃), the removal efficiencies for Total N (TN), NH+4-N were 55.6%, and 58.9%,respectively. The removal efficiencies for TN and NH4+-N depended on the retention time of the water in eximperimental zone.%本文依据太湖秋冬季水体氮污染的特点，应用辐射增殖氮循环细菌进行了净化湖水氮污染的动态模拟实验．研究结果表明，富营养化湖水经固定化氮循环细菌净化后，总氮下降72.4％，氨氮下降85.6％，出水水质得到明显改善．固定化氮循环细菌在冬季低温(7℃)条件下仍保持了较高的除氮能力，总氮和氨氮去除率分别为55.6％,58.9％．除氮效果与湖水滞留时间有关，探讨了固定化氮循环细菌的除氮机理．