Study on the mechanisms of enhanced biological nitrogen and phosphorus removal by denitrifying phosphorus removal in a Micro-pressure swirl reactor. (November 2022)

• Record Type: Journal Article
• Authors: Ma, Yunguang; Jiang, Weiqing; Nie, Zebing; Qi, Peng; Jiao, Yang; Peng, Jiaxi; Bian, Dejun
• Is Part Of: Bioresource technology. Volume 364(2022)
• Publication Date: 2022-11
• Subjects: Micro-pressure swirl reactor -- Denitrifying phosphorus removal -- Dissolved oxygen -- Microbial community structure -- Metabolic pathway; 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.2022.128093
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Coupling of denitrifying phosphorus removal and simultaneous nitrification endogenous denitrification phosphorus remova was implemented in MPSR. A new single sludge process is provided for the realization of DPR. DPAOs such as Flavobacterium and Dechloromonas dominated the DPR process in the low DO zone. To provide direction for future research on MPSR. Nutrient removal pathways are integrated in the MPSR. Abstract: To reveal the mechanisms of enhanced biological nitrogen and phosphorus removal by denitrifying phosphorus removal in a Micro-pressure swirl reactor (MPSR), this study used a MPSR to treat municipal wastewater and enriched denitrifying phosphate accumulating organisms (DPAOs) by using its alternating anaerobic-anoxic-aerobic environment. The coupling of denitrification phosphorus removal (DPR) and simultaneous nitrification endogenous denitrification phosphorus removal (SNEDPR) was achieved in MPSR, and the average removal rates of COD, NH4 + -N, TN and TP were 91.57%, 98.51%, 85.88%, 96.08% respectively. The results of the batch experiments showed that DPAOs activity in the low dissolved oxygen (DO) and high DO zones were 70.5% and 74.3%. The results of intracellular carbon source conversion patterns, microbial assays and functional gene prediction indicated that Flavobacterium and Dechloromonas dominated the DPR process in the low DO zone. Based on these findings, nutrient removal pathways within the MPSR were integrated.