AI Article Synopsis
- This study explored how a Micro-pressure swirl reactor (MPSR) can enhance the removal of nitrogen and phosphorus from municipal wastewater through a unique environment alternating between anaerobic, anoxic, and aerobic conditions.
- The reactor achieved high removal efficiencies for various pollutants, including COD (91.57%), NH-N (98.51%), TN (85.88%), and TP (96.08%).
- Key microbial species, Flavobacterium and Dechloromonas, were identified as dominant in the phosphorus removal process under low dissolved oxygen conditions, highlighting the complex interactions in nutrient removal pathways within the MPSR.
Article 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, NH-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.
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| http://dx.doi.org/10.1016/j.biortech.2022.128093 | DOI Listing |
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