Biological release of phosphorus is more efficient from activated than from aerobic granular sludge

Abstract Sewage sludge is a rich source of phosphorus. The kinetics of orthophosphate release and the efficiency of phosphorus recovery from aerobic granular sludge (GS) and activated sludge (AS) were compared at external organics (F) to biomass (M) ratios that ranged from 0 to 0.10. Changes in the...

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Autores principales:	Agnieszka Cydzik-Kwiatkowska, Dawid Nosek
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/17e726bed9d641ad9f9a38d014b6ef92
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spelling	oai:doaj.org-article:17e726bed9d641ad9f9a38d014b6ef922021-12-02T15:39:58ZBiological release of phosphorus is more efficient from activated than from aerobic granular sludge10.1038/s41598-020-67896-52045-2322https://doaj.org/article/17e726bed9d641ad9f9a38d014b6ef922020-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-67896-5https://doaj.org/toc/2045-2322Abstract Sewage sludge is a rich source of phosphorus. The kinetics of orthophosphate release and the efficiency of phosphorus recovery from aerobic granular sludge (GS) and activated sludge (AS) were compared at external organics (F) to biomass (M) ratios that ranged from 0 to 0.10. Changes in the F/M ratio affected orthophosphates release from AS to a greater extent than their release from GS. On average, increasing the F/M ratio by 0.02 increased the rate of phosphorus release from AS and GS by 2.12 and 1.75 mg P/(L h), respectively. Phosphorus release was highest at an F/M ratio of 0.04 (114.03 and 60.71 mg P/L from AS and GS, respectively). The efficiency of phosphorus recovery from AS ranged from 51.3 to 56.1%; the efficiency of its recovery from GS ranged from 32.8 to 37.5%. From GS, mostly inorganic phosphorus was released (about 8.5 mg/g MLSS), most of which was NAIP, i.e. phosphorus bound to Fe, Mn and Al. At a stoichiometric dose of MgO to PO4 3−, the precipitation efficiency was 30.13% ± 4.51 with uncontrolled pH and reached 81.73% ± 0.17 at a controlled pH of 10.Agnieszka Cydzik-KwiatkowskaDawid NosekNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Agnieszka Cydzik-Kwiatkowska Dawid Nosek Biological release of phosphorus is more efficient from activated than from aerobic granular sludge
description	Abstract Sewage sludge is a rich source of phosphorus. The kinetics of orthophosphate release and the efficiency of phosphorus recovery from aerobic granular sludge (GS) and activated sludge (AS) were compared at external organics (F) to biomass (M) ratios that ranged from 0 to 0.10. Changes in the F/M ratio affected orthophosphates release from AS to a greater extent than their release from GS. On average, increasing the F/M ratio by 0.02 increased the rate of phosphorus release from AS and GS by 2.12 and 1.75 mg P/(L h), respectively. Phosphorus release was highest at an F/M ratio of 0.04 (114.03 and 60.71 mg P/L from AS and GS, respectively). The efficiency of phosphorus recovery from AS ranged from 51.3 to 56.1%; the efficiency of its recovery from GS ranged from 32.8 to 37.5%. From GS, mostly inorganic phosphorus was released (about 8.5 mg/g MLSS), most of which was NAIP, i.e. phosphorus bound to Fe, Mn and Al. At a stoichiometric dose of MgO to PO4 3−, the precipitation efficiency was 30.13% ± 4.51 with uncontrolled pH and reached 81.73% ± 0.17 at a controlled pH of 10.
format	article
author	Agnieszka Cydzik-Kwiatkowska Dawid Nosek
author_facet	Agnieszka Cydzik-Kwiatkowska Dawid Nosek
author_sort	Agnieszka Cydzik-Kwiatkowska
title	Biological release of phosphorus is more efficient from activated than from aerobic granular sludge
title_short	Biological release of phosphorus is more efficient from activated than from aerobic granular sludge
title_full	Biological release of phosphorus is more efficient from activated than from aerobic granular sludge
title_fullStr	Biological release of phosphorus is more efficient from activated than from aerobic granular sludge
title_full_unstemmed	Biological release of phosphorus is more efficient from activated than from aerobic granular sludge
title_sort	biological release of phosphorus is more efficient from activated than from aerobic granular sludge
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/17e726bed9d641ad9f9a38d014b6ef92
work_keys_str_mv	AT agnieszkacydzikkwiatkowska biologicalreleaseofphosphorusismoreefficientfromactivatedthanfromaerobicgranularsludge AT dawidnosek biologicalreleaseofphosphorusismoreefficientfromactivatedthanfromaerobicgranularsludge
_version_	1718385856839942144

Biological release of phosphorus is more efficient from activated than from aerobic granular sludge

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