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- Title
Characteristics of nitrogen removal and microbial community in biofilm system via combination of pretreated lignocellulosic carriers and various conventional fillers.
- Authors
Zhao, Jing; Feng, Lijuan; Dai, Jincheng; Yang, Guangfeng; Mu, Jun
- Abstract
Each kind of conventional plastic filler (polyurethane filler, SPR-1 suspension filler, TA-II elastic filler and sphere filler) coupled with alkaline pretreated corncob (A.H.corncob) was applied in each bioreactor system for treating polluted water with nitrate and organics. Results demonstrated that addition of A.H.corncob could achieve simultaneous removal of nitrogen and organics, and coupling of SPR-1 suspension filler with A.H.corncob (R) had the best performance. In coupling system of R, the total nitrogen (TN) removal rate improved from below 10% to 55.92 ± 18.27% with effluent COD concentration maintaining at a low level of 2.67 ± 0.44 mg L. Microbial analysis of combined filler system demonstrated that conventional plastic filler mainly accumulated non-solid-phase denitrifiers for both nitrate and organics removal including genera Salipiger, Enterobacteriaceae etc. while A.H.corncob carrier was stronghold of solid-phase denitrifiers ( Runella, etc.) directly using lignocellulosic materials as carbon source and fermentative bacteria ( Coprococcus, etc.) for supplementing available carbon sources for denitrifiers in the system, which were integrated to achieve simultaneous removal of nitrate and organics.
- Subjects
NITROGEN removal (Sewage purification); MICROBIAL communities; BIOFILMS; LIGNOCELLULOSE; FILLER materials
- Publication
Biodegradation, 2017, Vol 28, Issue 5/6, p337
- ISSN
0923-9820
- Publication type
Article
- DOI
10.1007/s10532-017-9800-2