| Literature DB >> 28941666 |
Zhongchen Yang1, Luhua Yang2, Caijie Wei3, Weizhong Wu4, Xufei Zhao1, Ting Lu1.
Abstract
In this study, the performances of nitrogen removal in constructed wetlands using solid carbon source with limited aeration were investigated. The blends of poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and polyacetic acid (PLA) were used as the carbon source and biofilm support. The performances of nitrogen removal, microbial abundance and microbial community structure in the biofilm attached on PHBV/PLA were investigated. Higher ammonia removal efficiency (91.00%) and total nitrogen removal efficiency (97.03%) than non-aerated constructed wetland (System NA) were achieved in constructed wetland with limited aeration (System A). The limited aeration decreased the average concentrations of COD in effluent. And, System A had higher microbial abundance than System NA. Pyrosequencing analysis showed that denitrifying bacteria Brevinema (41.85%) and Thiothrix (12.33%) were the predominant genus in the biofilm attached on the carbon source in System NA and System A, respectively.Entities:
Keywords: Constructed wetlands; Limited aeration; Nitrogen removal; Solid carbon source
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Year: 2017 PMID： 28941666 DOI： 10.1016/j.biortech.2017.07.188
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642