Journal
BIORESOURCE TECHNOLOGY
Volume 228, Issue -, Pages 31-38Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.12.071
Keywords
Microbial community; Full-length 16S rRNA sequencing; Saline mustard tuber wastewater; Archaea; Partial nitrification and denitrification
Funding
- National Science and Technology Major Project for Water Pollution Control and Remediation of China [2012ZX07307-002]
- National Natural Science Foundation of China [51278508]
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A simultaneous nitrification, denitrification and organic matter removal (SNDOR) process in sequencing batch biofilm reactor (SBBR) was established to treat saline mustard tuber wastewater (MTWW) in this study. An average COD removal efficiency of 86.48% and total nitrogen removal efficiency of 86.48% were achieved at 30 g NaCl L (1) during 100 days' operation. The underlying mechanisms were investigated by PacBio SMRT DNA sequencing (V1-V9) to analyze the microbial community structures and its variation from low salinity at 10 g NaCl L (1) to high salinity at 30 g NaCl L (1). Results showed elevated salinity did not affect biological performance but reduced microbial diversity in SBBR, and halophilic bacteria gradually predominated by succession. Despite of high C/N, autotrophic ammonia-oxidizing bacteria (AOB) Nitrosomonas and ammonia-oxidizing archaea (AOA) Candidatus Nitrososphaera both contributed to ammonium oxidation. As salinity increasing, nitrite-oxidizing bacteria (NOB) were significantly inhibited, partial nitrification and denitrification (PND) process gradually contributed to nitrogen removal. (C) 2016 Elsevier Ltd. All rights reserved.
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