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  • biodiversity and quantification of functional bacteria in completely autotrophic nitrogen-removal over nitrite (canon) process

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 868
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the research was conducted to investigate the microbial diversity and population with the different concentration of nh4+–n in a biofilm reactor filled with volcanic filter for completely autotrophic nitrogen-removal over nitrite (canon) process. the reactor had an excellent performance with the decreasing of nh4+–n concentration from 400 to 200 mg l−1 while nh4+–n removal loading reduced at the nh4+–n concentration of 100 mg l−1. biodiversity analysis indicated that nitrosomonas related aerobic ammonia oxidizing bacteria (aob) and planctomycetales-like anaerobic ammonia oxidizing (anammox) bacteria were dominant functional bacteria. despite the different influent nh4+–n concentration, anammox bacteria had a low and stable biodiversity, which was not the same to aob. with the concentration reduction of influent nh4+–n, the estimates of total bacteria population ranged between 2.29 × 1011 and 1.44 × 1012 copies mg−1total dna, and the quantity of aob decreased while anammox bacteria kept stable. the population of nitrospira increased and little nitrobacter was detected during the experiment.

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