Genome-based microbial ecology of anammox granules in a full-scale wastewater treatment system

Daan R. Speth*, Michiel H. In'T Zandt, Simon Guerrero-Cruz, Bas E. Dutilh, Mike S M Jetten

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

242 Citations (Scopus)
26 Downloads (Pure)


Partial-nitritation anammox (PNA) is a novel wastewater treatment procedure for energy-efficient ammonium removal. Here we use genome-resolved metagenomics to build a genome-based ecological model of the microbial community in a full-scale PNA reactor. Sludge from the bioreactor examined here is used to seed reactors in wastewater treatment plants around the world; however, the role of most of its microbial community in ammonium removal remains unknown. Our analysis yielded 23 near-complete draft genomes that together represent the majority of the microbial community. We assign these genomes to distinct anaerobic and aerobic microbial communities. In the aerobic community, nitrifying organisms and heterotrophs predominate. In the anaerobic community, widespread potential for partial denitrification suggests a nitrite loop increases treatment efficiency. Of our genomes, 19 have no previously cultivated or sequenced close relatives and six belong to bacterial phyla without any cultivated members, including the most complete Omnitrophica (formerly OP3) genome to date.

Original languageEnglish
Article number11172
Number of pages10
JournalNature Communications
Publication statusPublished - 2016


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