Development of a single-stage mainstream anammox process using a sponge-bed trickling filter

Journal article (2020)

Authors

Takahiro Watari Nagaoka University of Technology, IHE Delft Institute for Water Education, Hanoi University of Science and Technology
Carlos M. López-Vázquez IHE Delft Institute for Water Education
Masashi Hatamoto Nagaoka University of Technology
Takashi Yamaguchi Nagaoka University of Technology
J.B. van Lier IHE Delft Institute for Water Education, Sanitary Engineering - CEG
Research Group
Sanitary Engineering (CEG) (TU Delft)
Copyright: © 2020 Takahiro Watari, Carlos Lopez Vazquez, Masashi Hatamoto, Takashi Yamaguchi, J.B. van Lier
DOI
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https://doi.org/10.1080/09593330.2020.1720309
Autotrophic nitrogen removal Microbial community analysis Sponge-based trickling filter
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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Water Management

Research Group

Sanitary Engineering

Abstract

Anaerobic ammonia oxidation to nitrogen gas using nitrite as the electron acceptor (anammox process) is considered a cost-effective solution for nitrogen removal after an anaerobic pre-treatment process. In this study, we conducted a laboratory-scale experiment to develop a single-stage partial nitritation–anammox process in a sponge-based trickling filter (STF) reactor, inoculated with anammox sludge, simulating the treatment of anaerobically pretreated concentrated domestic sewage without mechanical oxygen control. The influent ammonia concentration was 100 mg-N·L−1. The KLa of the STF reactor was higher than those observed for conventional activated sludge processes. The STF reactor performed at 89.8 ± 8.2% and 42.7 ± 16.9% ammonia and TN removal efficiency, respectively, with a nitrogen loading rate of 0.55 ± 0.20 kg-N·m−3·day−1 calculated based on sponge volume. Microbial community analysis of the STF-retained sludge indicated that both autotrophic and heterotrophic nitrogen removal occurred in the reactor.