摘要
在SBR反应器中,采用模拟废水和好氧活性污泥富集培养异养硝化菌,并对分离、筛选出的菌株进行脱氮性能的检测。在进水氨氮由100 mg/L逐渐增至1 396 mg/L的过程中,对NH3-N的去除率始终能达到100%,而对TN的去除率由初期的零逐渐增至后期的45.7%,说明在后期发生了同步硝化反硝化作用(SND),系统中可能存在异养硝化菌。在筛选出的15株硝化菌中,菌株A1和T6经过1周的好氧培养后,对COD的去除率分别为56.0%和72.3%,对氨氮的去除率分别为71.2%和85.8%,且仅检测到痕量的亚硝酸盐氮和硝酸盐氮,由此证明菌株A1和T6为异养硝化菌。
Simulated wastewater and aerobic activated sludge were used to cultivate heterotrophic nitrifying bacteria, and the nitrogen removal performance of strains separated and screened was detected. During the increase of the influent ammonia nitrogen from 100 mg/L to 1 396 mg/L, the removal rate of ammonia nitrogen is always 100%, while the removal rate of total nitrogen is increased from 0 to 45.7%, which indicates that there are heterotrophic nitrifying bacteria and simultaneous nitrification and denitrification （SND） in the SBR. Among 15 strains screened, after 7 day culture, the removal rates of COD by the strains A1 and T6 are 56.0% and 72.3% respectively, and the removal rates of ammonia nitrogen are 71.2% and 85.8% respectively. Trace nitrate and nitrite detected prove that the strains A1 and T6 are heterotrophic nitrifying bacteria.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第23期83-85,共3页
China Water & Wastewater
关键词
SBR
异养硝化菌
氨氮
SBR
heterotrophic nitrifying bacteria
ammonia nitrogen
