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Water 2017, 9(11), 829; https://doi.org/10.3390/w9110829

Characterization of a Microbial Community in an Anammox Process Using Stored Anammox Sludge

School of Environmental Science and Engineering, Tongji University; Shanghai 200092, China
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Received: 8 September 2017 / Revised: 30 September 2017 / Accepted: 27 October 2017 / Published: 29 October 2017
(This article belongs to the Special Issue Biological Treatment of Wastewater)
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Abstract

This study investigated a rapid start-up anaerobic ammonium oxidation (Anammox) process by inoculation with stored Anammox sludge and characterized the associated microbial communities. The Anammox process took only 43 days to start. A high nitrogen removal rate of 1.13 kg N m−3 d−1 and a nitrogen loading rate of 1.28 kg N m−3 d−1 were achieved. The ratio of ammonium removal to nitrite removal to nitrate production (1:1:0.2) was slightly lower than the theoretical value, which indicated nitrogen removal by denitrification in the reactor. Illumina high-throughput sequencing of sludge samples confirmed the co-existence of Anammox bacteria and denitrifying bacteria in the reactor and demonstrated that denitrifying bacteria play a role in nitrogen removal during the Anammox process. The dominant microbes in the reactor were Proteobacteria, Chlorobi, Chloroflexi, and Planctomycetes. However, only one species of Anammox bacteria, Candidatus jettenia, was identified and had an abundance of 4.92%. Our results illustrate the relationship between Anammox reactor performance and microbial community succession. View Full-Text
Keywords: Anammox; bacterial community; start-up; up-flow anaerobic sludge blanket Anammox; bacterial community; start-up; up-flow anaerobic sludge blanket
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Chen, W.; Dai, X.; Cao, D.; Hu, X.; Liu, W.; Yang, D. Characterization of a Microbial Community in an Anammox Process Using Stored Anammox Sludge. Water 2017, 9, 829.

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