Development of a single-stage mainstream anammox process using a sponge-bed trickling filter. Issue 19 (24th August 2021)

• Record Type: Journal Article
• Authors: Watari, Takahiro; Vazquez, Carlos Lopez; Hatamoto, Masashi; Yamaguchi, Takashi; van Lier, Jules B.
• Is Part Of: Environmental technology. Volume 42:Issue 19(2021)
• Page Start: 3036
• Page End: 3047
• Publication Date: 2021-08-24
• Subjects: Autotrophic nitrogen removal -- sponge-based trickling filter -- microbial community analysis; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2020.1720309
• Languages: English
• ISSNs: 0959-3330

Abstract

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 KL a 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. GRAPHICAL ABSTRACT: UF0001