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  • Title: Anammox start-up in sequencing batch biofilm reactors using different inoculating sludge.
    Author: Yu YC, Gao DW, Tao Y.
    Journal: Appl Microbiol Biotechnol; 2013 Jul; 97(13):6057-64. PubMed ID: 23008003.
    Abstract:
    In this study, anammox bacteria were rapidly enriched in sequencing batch biofilm reactors (SBBRs) with different inoculations. The activated sludge taken from a sequencing batch reactor was used and inoculated to SBBR1, while SBBR2 was seeded with stored anaerobic sludge from an upflow anaerobic fixed bed (2-year stored at 5-15 °C). Nitrogen removal performance, anammox activity, biofilm characteristics and variation of the microbial community were evaluated. The maximum total nitrogen loading rate (NLR) of SBBR1 gradually reached to 1.62 kgN/(m³/day) with a removal efficiency higher than 88% and the NLR of SBBR2 reached to 1.43 kgN/(m³/day) with a removal efficiency of 86%. SBBR2 was more stable compared to SBBR1. These results, combined with molecular techniques such as scanning electron microscope, fluorescence in situ hybridization, and terminal restriction fragment length polymorphism, indicated that different genera of anammox bacteria became dominant. This research also demonstrates that SBBR is a promising bioreactor for starting up and enriching anammox bacteria.
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