Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4979120 | Journal of Hazardous Materials | 2018 | 41 Pages |
Abstract
Toxic compounds, such as 4-chlorophenol (4-CP), which is a common pollutant in wastewater, are removed efficiently from sequencing batch reactors (SBRs) by microorganisms. The bacterial community in aerobic granules formed during the removal of 4-CP in a SBR was monitored for 63Â days. The SBR reactor was operated with a constant filling and withdrawal time of 7 and 8Â min and decreasing settling time (30, 5, 3 and 2Â min) to induce the formation of aerobic granules. During the acclimation period lasting 15Â days (30Â min settling time) had a strong effect on the bacterial community. From day 18 onwards, Sphingobium and Comamonadaceae were detected. Rhizobiaceae were dominant from day 24 to day 28 when stable aerobic granules were formed. At day 35, fluffy granules were formed, but the bacterial community structure did not change, despite the changes in the reactor operation to inhibit filamentous bacteria growth. This is the first report on changes in the bacterial community structure of aerobic and fluffy granules during granulation process in a reactor fed with 4-CP and the prediction of its metabolic pathways.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Selene Gómez-Acata, Miguel Vital-Jácome, Mariana Vivian Pérez-Sandoval, Yendi E. Navarro-Noya, Frederic Thalasso, Marco Luna-Guido, Eloy Conde-Barajas, Luc Dendooven,