Open AccessEffects of organic carbon source on the performance and bacterial structure in biofilm processes for source water pretreatment
Author(s) -
Ya-lei Liu,
Bin Tu,
Guangfeng Yang,
Yi-chun Zhao,
Yi-shu Li,
Yuanyuan Fang,
Song De-dong,
Jun Mu,
Jing Sun,
Liang Zhu,
Xiangyang Xu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2009/1/012010
Subject(s) - biofilm , proteobacteria , firmicutes , chemistry , environmental chemistry , nitrospira , total organic carbon , food science , bacteroidetes , organic matter , bacteria , microbiology and biotechnology , microbial population biology , biology , biochemistry , organic chemistry , 16s ribosomal rna , genetics , gene
The operation performance of biofilm system is limited by the oligotrophic quality of source water, especially the bioavailable organics. In this study, two lab-scale biofilm reactors (R 1 and R 2 ) feeding different organic carbon sources (OCS) were built up using sediment in drinking water source as bacterial source. Experimental results showed that sediment in biofilm systems enhanced the NH 4 + -N removal performance. Using ethanol as OCS was more beneficial to the removal of NH 4 + -N with ammonia removal efficiency (ARE) of 87.0 ± 5.4%, which was higher and more stable than that of glucose with ARE of 83.9 ± 13.3%. Organic carbon source changed the bacterial structure in biofilm systems. The dominant phyla in biofilm under ethanol condition were Proteobacteria, Bacteroidetes and Firmicutes with relative abundances (RA) of 29.1%, 32.7% and 22.0%, respectively. The dominant phyla in biofilm exposure to glucose was Proteobacteria with an RA of 63.4%. At genus level, Nitrospira, Lachnospiraceae, Arcobacter and Hyphomicrobium were dominant under ethanol condition (R 1 ) with the total relative abundance of 20.5%. Sphaerotilus was the dominant genus under glucose condition (R 2 ) with RA of 33.72%. These dominant bacteria were basically having the ability for the removal of nitrogen and organic matter.