Journal
CHEMOSPHERE
Volume 155, Issue -, Pages 463-470Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2016.04.090
Keywords
Solid-phase denitrification; Nitrate removal; Water treatment; Pyrosequencing; Biodegradable polymers
Categories
Funding
- National Natural Science Foundation of China [51178241, 51338005]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13026]
Ask authors/readers for more resources
In the present study, three kinds of biopolymers, PHBV, PHBV/starch and PHBV/bamboo powder (BP) blends were used as carbon source and biofilm carriers for denitrification in packed bed reactors to remove nitrate from groundwater. Results showed that a fast start-up was obtained in bioreactors filled with both PHBV/Starch and PHBV/BP blends without external inocula and it took more than 3 month for PHBV reactor to reach the same loading rate. The PHBV/BP packed reactor exhibited a better nitrate removal efficiency (87.4 +/- 7.0%) and less adverse effects in nitrite accumulation and DOC release (below 0.5 mg NO2-NL-1 and 10.5 mg DOC L-1 in the effluent) during stable operation. Pyrosequencing analysis demonstrated that bacteria belonging to genus Clostridium in phylum Firmicus, which play the primary role in degrading the biopolymers, are the most dominant (33-15% of the sequences). The predominant species in all samples is related to Clostridium crotonatovorans. All the identified 11 genera of denitrifying bacteria affiliated with phylum Proteobacteria and constituted 30-55% in the representative sequences. The PHBV/BP blend is economically attractive carbon source with good denitrification performance. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available