Development of a single-stage mainstream anammox process using a sponge-bed trickling filter.
Environ Technol
; 42(19): 3036-3047, 2021 Aug.
Article
em En
| MEDLINE
| ID: mdl-31987004
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 100â
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 ± 0.20â
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.
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01-internacional
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MEDLINE
Assunto principal:
Reatores Biológicos
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Águas Residuárias
Idioma:
En
Ano de publicação:
2021
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Article