Abstract：
:Ecological floating bed (EFB) is a green technology for treatment of micro-polluted wastewater. However, its nitrogen removal efficiency is still unsatisfactory. In this study, two EFBs with additional carbon source were established to explore biofilm carriers addition on nitrogen removal and greenhouse gas (GHG) emissions at different C/N ratios and temperatures. Results showed that biofilm carriers addition increased nitrification and nitrogen removal efficiencies in EFB, and more denitrifying and nitrifying bacteria were attached to the biofilm carriers. Higher N2O and CH4 emissions were found in control EFB without biofilm carriers addition which was consistent with higher nitrite accumulation. In addition, high-throughput sequencing analysis revealed that adding biofilm carriers could improve the richness and diversity of biological communities. For EFB with additional carbon source treating secondary effluent, adding biofilm carrier can obtain higher TN removal efficiency and lower greenhouse gas emission.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Sun S,Liu J,Zhang M,He Sdoi
10.1016/j.biortech.2019.121944subject
Has Abstractpub_date
2019-11-01 00:00:00pages
121944eissn
0960-8524issn
1873-2976pii
S0960-8524(19)31174-5journal_volume
292pub_type
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