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Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates

Steve Slocombe, Tatiana Zúñiga-Burgos, Lili Chu, Nicola J. Wood, Miller Alonso Camargo-Valero, Alison Baker

Frontiers in Plant Science, Volume: 11

Swansea University Author: Steve Slocombe

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DOI (Published version): 10.3389/fpls.2020.00982

Abstract

Phosphorus (P), in the form of phosphate derived from either inorganic (Pi) or organic (Po) forms is an essential macronutrient for all life. P undergoes a biogeochemical cycle within the environment, but anthropogenic redistribution through inefficient agricultural practice and inadequate nutrient...

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Published in: Frontiers in Plant Science
ISSN: 1664-462X
Published: Frontiers Media SA 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa65471
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P undergoes a biogeochemical cycle within the environment, but anthropogenic redistribution through inefficient agricultural practice and inadequate nutrient recovery at wastewater treatment works have resulted in a sustained transfer of P from rock deposits to land and aquatic environments. Our present and near future supply of P is primarily mined from rock P reserves in a limited number of geographical regions. To help ensure that this resource is adequate for humanity's food security, an energy-efficient means of recovering P from waste and recycling it for agriculture is required. This will also help to address excess discharge to water bodies and the resulting eutrophication. Microalgae possess the advantage of polymeric inorganic polyphosphate (PolyP) storage which can potentially operate simultaneously with remediation of waste nitrogen and phosphorus streams and flue gases (CO2, SOx, and NOx). Having high productivity in photoautotrophic, mixotrophic or heterotrophic growth modes, they can be harnessed in wastewater remediation strategies for biofuel production either directly (biodiesel) or in conjunction with anaerobic digestion (biogas) or dark fermentation (biohydrogen). Regulation of algal P uptake, storage, and mobilization is intertwined with the cellular status of other macronutrients (e.g., nitrogen and sulphur) in addition to the manufacture of other storage products (e.g., carbohydrate and lipids) or macromolecules (e.g., cell wall). A greater understanding of controlling factors in this complex interaction is required to facilitate and improve P control, recovery, and reuse from waste streams. The best understood algal genetic model is Chlamydomonas reinhardtii in terms of utility and shared resources. It also displays mixotrophic growth and advantageously, species of this genus are often found growing in wastewater treatment plants. 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spelling v2 65471 2024-01-22 Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates 4a1ea486a78ed357efdfa053a277ae40 Steve Slocombe Steve Slocombe true false 2024-01-22 SBI Phosphorus (P), in the form of phosphate derived from either inorganic (Pi) or organic (Po) forms is an essential macronutrient for all life. P undergoes a biogeochemical cycle within the environment, but anthropogenic redistribution through inefficient agricultural practice and inadequate nutrient recovery at wastewater treatment works have resulted in a sustained transfer of P from rock deposits to land and aquatic environments. Our present and near future supply of P is primarily mined from rock P reserves in a limited number of geographical regions. To help ensure that this resource is adequate for humanity's food security, an energy-efficient means of recovering P from waste and recycling it for agriculture is required. This will also help to address excess discharge to water bodies and the resulting eutrophication. Microalgae possess the advantage of polymeric inorganic polyphosphate (PolyP) storage which can potentially operate simultaneously with remediation of waste nitrogen and phosphorus streams and flue gases (CO2, SOx, and NOx). Having high productivity in photoautotrophic, mixotrophic or heterotrophic growth modes, they can be harnessed in wastewater remediation strategies for biofuel production either directly (biodiesel) or in conjunction with anaerobic digestion (biogas) or dark fermentation (biohydrogen). Regulation of algal P uptake, storage, and mobilization is intertwined with the cellular status of other macronutrients (e.g., nitrogen and sulphur) in addition to the manufacture of other storage products (e.g., carbohydrate and lipids) or macromolecules (e.g., cell wall). A greater understanding of controlling factors in this complex interaction is required to facilitate and improve P control, recovery, and reuse from waste streams. The best understood algal genetic model is Chlamydomonas reinhardtii in terms of utility and shared resources. It also displays mixotrophic growth and advantageously, species of this genus are often found growing in wastewater treatment plants. In this review, we focus primarily on the molecular and genetic aspects of PolyP production or turnover and place this knowledge in the context of wastewater remediation and highlight developments and challenges in this field. Journal Article Frontiers in Plant Science 11 Frontiers Media SA 1664-462X acidocalcisomes, biofuel, biomass, biogas, phosphorus, polyphosphate, wastewater 30 6 2020 2020-06-30 10.3389/fpls.2020.00982 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University This work was supported by UK Research and Innovation (UKRI) through a grant award from the Biotechnology and Biological Sciences Research Council – BBSRC (BB/N016033/ 1). Further recognition to the EPSRC Centre for Doctoral Training in Bioenergy (EP/L014912/1) and to the ESRC funded GCRF Water Security and Sustainable Development Hub (ES/S008179/1) for the financial support provided to NW and TZ-B, respectively. 2024-03-20T17:03:38.7402979 2024-01-22T12:17:42.1588558 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Steve Slocombe 1 Tatiana Zúñiga-Burgos 2 Lili Chu 3 Nicola J. Wood 4 Miller Alonso Camargo-Valero 5 Alison Baker 6 65471__29768__9c922f0ae0614d48bb76f7f123d0240a.pdf 65471_VoR.pdf 2024-03-20T16:59:24.3362136 Output 2351965 application/pdf Version of Record true Copyright © 2020 Slocombe, Zuñiga-Burgos, Chu, Wood, Camargo-Valero and ́ Baker. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). true eng http://creativecommons.org/licenses/by/4.0/ 231
title Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates
spellingShingle Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates
Steve Slocombe
title_short Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates
title_full Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates
title_fullStr Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates
title_full_unstemmed Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates
title_sort Fixing the Broken Phosphorus Cycle: Wastewater Remediation by Microalgal Polyphosphates
author_id_str_mv 4a1ea486a78ed357efdfa053a277ae40
author_id_fullname_str_mv 4a1ea486a78ed357efdfa053a277ae40_***_Steve Slocombe
author Steve Slocombe
author2 Steve Slocombe
Tatiana Zúñiga-Burgos
Lili Chu
Nicola J. Wood
Miller Alonso Camargo-Valero
Alison Baker
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container_title Frontiers in Plant Science
container_volume 11
publishDate 2020
institution Swansea University
issn 1664-462X
doi_str_mv 10.3389/fpls.2020.00982
publisher Frontiers Media SA
college_str Faculty of Science and Engineering
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hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
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description Phosphorus (P), in the form of phosphate derived from either inorganic (Pi) or organic (Po) forms is an essential macronutrient for all life. P undergoes a biogeochemical cycle within the environment, but anthropogenic redistribution through inefficient agricultural practice and inadequate nutrient recovery at wastewater treatment works have resulted in a sustained transfer of P from rock deposits to land and aquatic environments. Our present and near future supply of P is primarily mined from rock P reserves in a limited number of geographical regions. To help ensure that this resource is adequate for humanity's food security, an energy-efficient means of recovering P from waste and recycling it for agriculture is required. This will also help to address excess discharge to water bodies and the resulting eutrophication. Microalgae possess the advantage of polymeric inorganic polyphosphate (PolyP) storage which can potentially operate simultaneously with remediation of waste nitrogen and phosphorus streams and flue gases (CO2, SOx, and NOx). Having high productivity in photoautotrophic, mixotrophic or heterotrophic growth modes, they can be harnessed in wastewater remediation strategies for biofuel production either directly (biodiesel) or in conjunction with anaerobic digestion (biogas) or dark fermentation (biohydrogen). Regulation of algal P uptake, storage, and mobilization is intertwined with the cellular status of other macronutrients (e.g., nitrogen and sulphur) in addition to the manufacture of other storage products (e.g., carbohydrate and lipids) or macromolecules (e.g., cell wall). A greater understanding of controlling factors in this complex interaction is required to facilitate and improve P control, recovery, and reuse from waste streams. The best understood algal genetic model is Chlamydomonas reinhardtii in terms of utility and shared resources. It also displays mixotrophic growth and advantageously, species of this genus are often found growing in wastewater treatment plants. In this review, we focus primarily on the molecular and genetic aspects of PolyP production or turnover and place this knowledge in the context of wastewater remediation and highlight developments and challenges in this field.
published_date 2020-06-30T17:03:34Z
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