Assessing the performance of polyphosphate accumulating organisms in a full-scale side-stream enhanced biological phosphorous removal

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dc.contributor.authorAghilinasrollahabadi, Khashayar
dc.contributor.authorGhandehari, Shahrzad Saffari
dc.contributor.authorKjellerup, Birthe Veno
dc.contributor.authorNguyen, Caroline
dc.contributor.authorSaavedra, Yerman
dc.contributor.authorLi, Guangbin
dc.date.accessioned2024-07-02T17:33:17Z
dc.date.available2024-07-02T17:33:17Z
dc.date.issued2024-01-11
dc.description.abstractPhosphorous (P) removal in wastewater treatment is essential to prevent eutrophication in water bodies. Side-stream enhanced biological phosphorous removal (S2EBPR) is utilized to improve biological P removal by recirculating internal streams within a side-stream reactor to generate biodegradable carbon (C) for polyphosphate accumulating organisms (PAOs). In this study, a full-scale S2EBPR system in a water resource recovery facility (WRRF) was evaluated for 5 months. Batch experiments revealed a strong positive correlation (r = 0.91) between temperature and C consumption rate (3.56–8.18 mg-COD/g-VSS/h) in the system, with temperature ranging from 14°C to 18°C. The anaerobic P-release to COD-uptake ratio decreased from 0.93 to 0.25 mg-P/mg-COD as the temperature increased, suggesting competition between PAOs and other C-consumers, such as heterotrophic microorganisms, to uptake bioavailable C. Microbial community analysis did not show a strong relationship between abundance and activity of PAO in the tested WRRF. An assessment of the economic feasibility was performed to compare the costs and benefits of a full scale WRRF with and without implementation of the S2EBPR technology. The results showed the higher capital costs required for S2EBPR were estimated to be compensated after 5 and 11 years of operation, respectively, compared to chemical precipitation and conventional EBPR. The results from this study can assist in the decision-making process for upgrading a conventional EBPR or chemical P removal process to S2EBPR.
dc.description.urihttps://doi.org/10.1002/wer.10961
dc.identifier.citationAghilinasrollahabadi, K., Saffari Ghandehari, S., Kjellerup, B. V., Nguyen, C., Saavedra, Y., & Li, G. (2024). Assessing the performance of polyphosphate accumulating organisms in a full-scale side-stream enhanced biological phosphorous removal. Water Environment Research, 96(1), e10961.
dc.identifier.urihttp://hdl.handle.net/1903/33114
dc.language.isoen_US
dc.publisherWiley
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtCivil & Environmental Engineeringen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.titleAssessing the performance of polyphosphate accumulating organisms in a full-scale side-stream enhanced biological phosphorous removal
dc.typeArticle
local.equitableAccessSubmissionNo

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