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- W2757009009 abstract "Abstract The nitrification process demands higher oxygen supply, which is fulfilled through external aeration in wastewater treatment. To perform nitrification without external aeration, this study developed a novel rotating sponge (RS) reactor and estimated its oxygen transfer capability. The reactor obtained an oxygen transfer coefficient (KLa) value of over 100 d−1 at 40 rounds per hour (rph), which is one-eighth of the rotational speed of conventional rotational biological contactors. Within 53 days of operation, reactor achieved 97% nitrification efficiency with an effluent NH4+-N concentration of 1 mgL−1. On the other hand, the volumetric oxygen transfer rate in the reactor was 245 mg-O2L−1d−1 at 10 rph during the experimental period. However, the average volumetric oxygen consumption rate during nitrification was 187 mg-O2L−1d−1, which was below the oxygen transfer rate. Microbial community analysis revealed high relative abundance of bacteria such as Nitrosomonas, Nitrospira, and Nitrobacter in the RS reactor, which contributed to nitrification." @default.
- W2757009009 created "2017-10-06" @default.
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- W2757009009 date "2017-12-01" @default.
- W2757009009 modified "2023-09-24" @default.
- W2757009009 title "Oxygen transfer dynamics and nitrification in a novel rotational sponge reactor" @default.
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- W2757009009 doi "https://doi.org/10.1016/j.bej.2017.09.021" @default.
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