Effect of temperature and load variation of pda system initiated by anammox bacteria self-enrichment
MA Yu-qing, WANG Bo, LI Xiao-di
Engineering Research Center of Beijing, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
Abstract：A UASB inoculated with PDA sludge initiated by anammox bacteria self-enrichment was used to gradually increase the influent nitrogen concentration from 20mg/L to 100mg/L at 25°C down to 19°C (the nitrogen load increased from 3.2g/(m3·d) to 4.0g/(m3·d)). The reactor was operated for 115 days with a maximum total nitrogen removal efficiency of 89.9%. 16S rRNA gene sequencing results showed that Candidatus Brocadia as the main anammox functional bacterium reached 3.7% abundance in the bio-carriers and the partial denitrifying functional bacterium Thaurea reached a maximum abundance of 15.7% in the floc sludge. Metagenomic analysis showed that the genes Nar and Nap, associated with partial denitrification, and Nir, Hzs and Hdh, associated with anammox, were fully expressed.
马雨晴, 王博, 李笑迪. 温度与负荷对Anammox菌自富集启动的PDA的影响[J]. 中国环境科学, 2024, 44(3): 1307-1313.
MA Yu-qing, WANG Bo, LI Xiao-di. Effect of temperature and load variation of pda system initiated by anammox bacteria self-enrichment. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1307-1313.
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