低温贫营养原位生物投菌技术脱氮特性研究

为有效解决微污染水体原位生物脱氮处理中存在的低温、贫营养及好氧环境问题,采用自适应及菌源生态重组策略构建了低温贫营养脱氮功能菌群,考察了该功能菌群在低温条件下的实验室静态脱氮效能。结果表明,在水温为10～18℃,菌投量为1 mg/L,水源水水质为CODMn3.262 mg/L、NH4+-N 0.186 mg/L、NO2--N 0.012 mg/L、NO3--N 2.237 mg/L、TN 2.616mg/L的条件下,系统运行期间硝氮和总氮去除率最大可达到46%和53%。同时还探讨了低温微生物的冷适应机制,为开展低温季节微污染水体原位生物修复研究提供了理论依据。

Denitrification characteristics of in-situ biological inoculation under conditions of low temperature and poor nutrient

In order to solve the problems of low temperature,poor nutrient and aerobic environment resulted by biological removal of nitrogen for micro-polluted raw water in-situ,the low temperature resistant and oligotrophic denitrifying functional microorganism groups could be constructed by self-adjustment and eco-recombination,and the static denitrification effects of the functional microorganism groups were studied in laboratory.The results showed that the maximum removal rate of NO-3-N and TN could reach 46% and 53% respectively during operation under the conditions of temperature about 10 to 18 ℃,dosage of inoculation 1 mg/L,and CODMn 3.262 mg/L,NH+4-N 0.186 mg/L,NO-2-N 0.012 mg/L,NO-3-N 2.237 mg/L,TN 2.616 mg/L in the source water quality.The cold-adapted mechanism of low temperature resistant microorganisms was also discussed,and it could provide a theoretical basis for the research of in-situ bioremediation for micro-polluted raw water in cold seasons.