Phosphorus removal and N2O production in anaerobic/anoxic denitrifying phosphorus removal process: Long-term impact of influent phosphorus concentration. (March 2015)

• Record Type: Journal Article
• Authors: Wang, Zhen; Meng, Yuan; Fan, Ting; Du, Yuneng; Tang, Jie; Fan, Shisuo
• Is Part Of: Bioresource technology. Volume 179(2015)
• Page Start: 585
• Page End: 594
• Publication Date: 2015-03
• Subjects: Denitrifying phosphate accumulating organisms -- Denitrifying phosphorus removal -- Influent phosphorus concentration -- N2O -- Poly-β-hydroxyalkanoates (PHA); Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2014.12.016
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Influent P concentration affected denitrifying dephosphatation and N2 O production. DPAOs was suppressed as influent P concentration was more than 20 mg L −1 . N2 O production was inhibited with the suppression of DPAOs. A modified feeding decreased effluent P concentration and N2 O production. Abstract: This study was conducted to investigate the long-term impact of influent phosphorus concentration on denitrifying phosphorus removal and N2 O production during denitrifying phosphorous removal process. The results showed that, denitrifying phosphate accumulating organisms (DPAOs) could become dominant populations quickly in anaerobic/anoxic SBR by providing optimum cultivating conditions, and the reactor performed well for denitrifying phosphorus removal. The influent phosphorus concentration significantly affected anaerobic poly- β -hydroxyalkanoates (PHA) synthesis, denitrifying phosphorus removal, and N2 O production during the denitrifying phosphorus removal process. As the influent phosphorus concentration was more than 20 mg L −1, the activity of DPAOs began to be inhibited due to the transformation of the available carbon source type. Meanwhile, N2 O production was inhibited with the mitigation of anoxic NO2 − -N accumulation. Adoption of a modified feeding could enhance denitrifying phosphorus removal and inhibit N2 O production during denitrifying phosphorous removal processes.