Effects of the Wastewater Flow Rate on Interactions between the Genus Nitrosomonas and Diverse Populations in an Activated Sludge Microbiome

• Published in: Microbes and Environments Vol. 34; no. 1; pp. 89 - 94
• Main Authors: Narihiro, Takashi, Nobu, Masaru Konishi, Hori, Tomoyuki, Aoyagi, Tomo, Sato, Yuya, Inaba, Tomohiro, Aizawa, Hidenobu, Tamaki, Hideyuki, Habe, Hiroshi
• Format: Journal Article
• Language: English
• Published: Miyagi Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles 2019; Japan Science and Technology Agency; the Japanese Society of Microbial Ecology (JSME)/the Japanese Society of Soil Microbiology (JSSM)/the Taiwan Society of Microbial Ecology (TSME)/the Japanese Society of Plant Microbe Interactions (JSPMI)
• Subjects: Activated sludge; Ammonia; Bacteria; Flow velocity; Gene sequencing; Interactions; microbial community; Microbiomes; Microorganisms; Network analysis; Nitrosomonas; Oxidizing agents; Populations; rRNA 16S; Short Communication; Sludge; Thiothrix; Wastewater
• ISSN: 1342-6311; 1347-4405
• DOI: 10.1264/jsme2.ME18108

The present study characterized the interactions of microbial populations in activated sludge systems during the operational period after an increase in the wastewater flow rate and consequential ammonia accumulation using a 16S rRNA gene sequencing-based network analysis. Two hundred microbial populations accounting for 81.8% of the total microbiome were identified. Based on a co-occurrence analysis, Nitrosomonas-type ammonia oxidizers had one of the largest number of interactions with diverse bacteria, including a bulking-associated Thiothrix organism. These results suggest that an increased flow rate has an impact on constituents by changing ammonia concentrations and also that Nitrosomonas- and Thiothrix-centric responses are critical for ammonia removal and microbial community recovery.