Single reactor nitritation-denitritation for high strength digested biosolid thickening lagoon supernatant treatment

Abstract Ammonia-rich lagoon supernatant has a low alkalinity/nitrogen ratio, which is ideal for single reactor nitritation-denitritation operation. In the present study, an integrated fixed film and activated sludge system in sequencing batch mode (IFAS-SBR) was operated at 21 °C for 140 days. The stability and feasibility of nitritation-denitritation performance was evaluated, and the microbial activities and microbial community dynamics were investigated. With a hydraulic retention time (HRT) of 2 days, the IFAS-SBR achieved a stable inorganic nitrogen removal rate of 98 %. Nitritation and denitritation activities were both higher in suspended flocs as compared to biofilm. The dominant nitrifying and primary denitrifying genera were Nitrosomonas and Thauera, respectively. During long-term operation, the relative richness of Nitrosomonas and Thauera increased in both biofilm (from 0.27 % to 1.12 % and from

• Publication year

  2020

• Venue

  Biochemical Engineering Journal

• Publication date

  2020-08-15

• Fields of study

  Chemistry, Environmental Science

• Identifiers
  DOI 10.1016/j.bej.2020.107630
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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