应用短乳杆菌去除养殖水体中亚硝酸盐

Removal of Nitrite From Aquacultural Water With Lactobacillus brevis

对短乳杆菌（Lactobacillus brevis）在养殖水体中去除亚硝酸盐的能力以及主要影响因素的试验结果表明,短乳杆菌能够在复杂的养殖水环境中有效去除亚硝酸盐。短乳杆菌对养殖水体中亚硝酸盐去除的适宜条件为：水温25℃以上,pH≤8.0,菌液使用量≤10 mg·L^-1,亚硝酸盐本底质量浓度≤1.0 mg·L^-1,有效处理时间为0-48 h。除了活菌体,短乳杆菌的代谢产物也有去除亚硝酸盐的能力。研究表明,短乳杆菌可作为一种潜在的养殖水体环境生物修复产品而加以开发利用。

An experiment was carried out on capacity of LactobaciUus brevis for removing nitrite from an aquacuhural water body and its major affecting factors. Results show that LactobaciUus brevis is capable of efficiently removing nitrite in a water body complicated in water environment. It functions most efficiently when applied at a rate of ≤10 mg·L^-1 and when the water is 〉25 ℃ in temperature and ≤8.0 in pH, and≤1.0 mg·L^-1 in nitrite concentration, and the effect is most significant within 48 hours. Besides living Lactobacillus brevis, its metabolites are also capable of removing nitrite. The research demonstrates that Lactobacillus brevis can be exploited as a potential product for bioremediation of aquacultural waterbody environment.