Study on the denitrifying characteristics of oligotrophicaerobic denitrifying bacteria flora from source water reservoir
JIANG Yun-xia1,2, HUANG Ting-lin1,2, YANG Shang-ye1,2, KOU Li-qing1,2
1. Shannxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Key Laboratory of Northwest Water Resource, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China
In order to reduce the nitrogen concentration in micro-polluted reservoirs, a mixed high efficient aerobic denitrifying flora-A1, dominated by Pseudomonas, was directional enrichment and domestication from the sediments of Lijiahe Reservoir (Xi'an). Shaker experiments showed that the nitrate nitrogen removal ratio of lean nutrient aerobic denitrifying flora A1reached 93.39% at 15h, and the average nitrate removal rate was 0.2073mg/ (L·h). The total nitrogen removal ratio was 52.11% and the average removal rate of total nitrogen was 0.1153mg/(L·h). There was no nitrite accumulation detected. Nitrogen balance analysis showed that about 45% of the initial nitrogen was removed and converted into gas products. Response surface method (RSM) results showed when C/N ratio=9.96, temperature=22.67 ℃, pH=8.01, speed=91r/min, dissolved oxygen=8.55mg/L, the optimum condition of total nitrogen (TN) removal could be obtained.
蒋云霞, 黄廷林, 杨尚业, 寇莉青. 水源水库贫营养好氧反硝化菌群脱氮特性研究[J]. 中国环境科学, 2020, 40(6): 2493-2502.
JIANG Yun-xia, HUANG Ting-lin, YANG Shang-ye, KOU Li-qing. Study on the denitrifying characteristics of oligotrophicaerobic denitrifying bacteria flora from source water reservoir. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2493-2502.
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