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  • Title: Microbial activity along the depth of biofilm in the simultaneous partial nitrification, anammox and denitrification (SNAD) system.
    Author: Wen X, Huang J, Zeng G, Liu D, Chen S.
    Journal: Environ Technol; 2024 Jan; 45(4):771-778. PubMed ID: 36151756.
    Abstract:
    Simultaneous partial nitrification, anammox and denitrification (SNAD) is a sustainable and cost-effective technology for nitrogen removal from low-strength wastewater. However, knowledge of the biofilm microenvironment of the SNAD system is currently unsatisfactory. The purpose of this study was to evaluate organic carbon effects on the microenvironment and microbial growth in the SNAD biofilm system. Microelectrodes were used to investigate microbial activity in-depth within biofilms. ORP distribution of the SNAD system was positively related to anammox activity(R2 = 0.9), and had some influence on microbial community structure. The synergistic effect of anammox bacteria and denitrifiers could be achieved when the abundance ratio of anammox bacteria to denitrifying bacteria is greater than 1.2.
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