Intensified simultaneous nitrification and denitrification performance in integrated packed bed bioreactors using PHBV with different dosing methods
To explore an effective approach of simultaneous nitrification and denitrification in wastewater with low C/N ratios, integrated packed bed bioreactors based on poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) with different dosing methods were designed. The removal efficiency of NH 4 + -N in bioreact...
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Veröffentlicht in: | Environmental science and pollution research international 2020-06, Vol.27 (17), p.21560-21569 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | To explore an effective approach of simultaneous nitrification and denitrification in wastewater with low C/N ratios, integrated packed bed bioreactors based on poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) with different dosing methods were designed. The removal efficiency of NH
4
+
-N in bioreactor with aeration was 88.62%, and higher NO
3
−
-N removal efficiency was observed in bioreactor filled with grainy PHBV (95.21%) than bioreactor filled with strip PHBV (93.34%). Microbial study indicated that microbes harboring
amoA
and
nirS
genes preferred to attach on the surface of ceramsite, and significant differences in microbial community compositions at phylum and genus levels were observed. To summarize, it is feasible to utilize grainy PHBV for simultaneous and efficient removal of NH
4
+
-N and NO
3
−
-N from wastewater with low C/N ratios. |
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ISSN: | 0944-1344 1614-7499 |
DOI: | 10.1007/s11356-020-08290-6 |