In a high concentration substrate medium, a heterotrophic bacterium with high removal efficiency of ammonium, named W1, was isolated from activated sludge of coking wastewater treatment facility. The bacterium was Gra...In a high concentration substrate medium, a heterotrophic bacterium with high removal efficiency of ammonium, named W1, was isolated from activated sludge of coking wastewater treatment facility. The bacterium was Gram-negative, rod-shaped, and identified preliminarily as Alcaligenes sp. according to its morphological and physiological properties and its 16S rRNA gene sequence analysis. In the high concentration ammonium medium (400 mg·L 1 4 NH -N), the effects of C source, N source, C/N ratio and initial pH of medium on ammonium removal were investigated in order to determine the optimal condition for strain W1. The maximum ammonium removal was around 95% in 4 days in an improved medium. The production of N 2 gas was examined in a closed system that was full of pure oxygen at the beginning. N 2 gas was detected in the system after 4 days of cultivation, which further testified that strain W1 has heterotrophic nitrification and aerobic denitrification abilities simultaneously.展开更多
火灾报警和气体检测系统简称火气系统（FGS,Fire Alarm and Gas Detector System）是用于监控火灾和可燃气及毒气泄漏事故,并具备报警和一定灭火功能的安全控制系统,在火灾和可燃性气体泄漏以及毒气泄漏等情况下,能准确探测火灾和气体...火灾报警和气体检测系统简称火气系统（FGS,Fire Alarm and Gas Detector System）是用于监控火灾和可燃气及毒气泄漏事故,并具备报警和一定灭火功能的安全控制系统,在火灾和可燃性气体泄漏以及毒气泄漏等情况下,能准确探测火灾和气体泄漏的程度和事故地点,触发相关的广播和声光报警设备,并且根据事故发生的严重性等级而确定报警和关断输出等级。展开更多
基金Supported by the National Natural Science Foundation of China (51078252)the International Cooperation Projects of Shanxi Province (2010081018)the Natural Science Foundation of Shanxi Province (2010011016-1)
文摘In a high concentration substrate medium, a heterotrophic bacterium with high removal efficiency of ammonium, named W1, was isolated from activated sludge of coking wastewater treatment facility. The bacterium was Gram-negative, rod-shaped, and identified preliminarily as Alcaligenes sp. according to its morphological and physiological properties and its 16S rRNA gene sequence analysis. In the high concentration ammonium medium (400 mg·L 1 4 NH -N), the effects of C source, N source, C/N ratio and initial pH of medium on ammonium removal were investigated in order to determine the optimal condition for strain W1. The maximum ammonium removal was around 95% in 4 days in an improved medium. The production of N 2 gas was examined in a closed system that was full of pure oxygen at the beginning. N 2 gas was detected in the system after 4 days of cultivation, which further testified that strain W1 has heterotrophic nitrification and aerobic denitrification abilities simultaneously.
文摘火灾报警和气体检测系统简称火气系统（FGS,Fire Alarm and Gas Detector System）是用于监控火灾和可燃气及毒气泄漏事故,并具备报警和一定灭火功能的安全控制系统,在火灾和可燃性气体泄漏以及毒气泄漏等情况下,能准确探测火灾和气体泄漏的程度和事故地点,触发相关的广播和声光报警设备,并且根据事故发生的严重性等级而确定报警和关断输出等级。
