Treatment of secondary urban wastewater with a low ammonium-tolerant marine microalga using zeolite-based adsorption

L. López-Rosales; P. López-García; M. A. Benyachou; A. Molina-Miras; J. J. Gallardo-Rodríguez; M. C. Cerón-García; A. Sánchez Mirón; F. García-Camacho

doi:10.1016/j.biortech.2022.127490

Treatment of secondary urban wastewater with a low ammonium-tolerant marine microalga using zeolite-based adsorption

L. López-Rosales, P. López-García, M. A. Benyachou, A. Molina-Miras, J. J. Gallardo-Rodríguez, M. C. Cerón-García, A. Sánchez Mirón, F. García-Camacho

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The low tolerance of marine microalgae to ammonium and hyposalinity limits their use in urban wastewater (UWW) treatments. In this study, using the marine microalga Amphidinium carterae, it is demonstrated for the first time that this obstacle can be overcome by introducing a zeolite-based adsorption step to obtain a tolerable UWW stream. The maximum ammonium adsorption capacities measured in the natural zeolite used are among the highest reported. The microalga grows satisfactorily in mixtures of zeolite-treated UWW and seawater at a wide range of proportions, both with and without adjusting the salinity, as long as the ammonium concentration is below the threshold tolerated by the microalgae (6.3 mg L⁻¹). A proof of concept performed in 10-L bubble column photobioreactors with different culture strategies, including medium recycling, showed an enhanced biomass yield relative to a control with no UWW. No noticeable effect was observed on the production of specialty metabolites.

Original language	English
Article number	127490
Journal	Bioresource Technology
Volume	359
DOIs	https://doi.org/10.1016/j.biortech.2022.127490
State	Published - Sep 2022
Externally published	Yes

Keywords

Adsorption
Ammonium
Microalga
Photobioreactor
Wastewater treatment
Zeolite

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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López-Rosales, L., López-García, P., Benyachou, M. A., Molina-Miras, A., Gallardo-Rodríguez, J. J., Cerón-García, M. C., Sánchez Mirón, A., & García-Camacho, F. (2022). Treatment of secondary urban wastewater with a low ammonium-tolerant marine microalga using zeolite-based adsorption. Bioresource Technology, 359, Article 127490. https://doi.org/10.1016/j.biortech.2022.127490

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abstract = "The low tolerance of marine microalgae to ammonium and hyposalinity limits their use in urban wastewater (UWW) treatments. In this study, using the marine microalga Amphidinium carterae, it is demonstrated for the first time that this obstacle can be overcome by introducing a zeolite-based adsorption step to obtain a tolerable UWW stream. The maximum ammonium adsorption capacities measured in the natural zeolite used are among the highest reported. The microalga grows satisfactorily in mixtures of zeolite-treated UWW and seawater at a wide range of proportions, both with and without adjusting the salinity, as long as the ammonium concentration is below the threshold tolerated by the microalgae (6.3 mg L−1). A proof of concept performed in 10-L bubble column photobioreactors with different culture strategies, including medium recycling, showed an enhanced biomass yield relative to a control with no UWW. No noticeable effect was observed on the production of specialty metabolites.",

keywords = "Adsorption, Ammonium, Microalga, Photobioreactor, Wastewater treatment, Zeolite",

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year = "2022",

month = sep,

doi = "10.1016/j.biortech.2022.127490",

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AU - López-Rosales, L.

AU - López-García, P.

AU - Benyachou, M. A.

AU - Molina-Miras, A.

AU - Gallardo-Rodríguez, J. J.

AU - Cerón-García, M. C.

AU - Sánchez Mirón, A.

AU - García-Camacho, F.

PY - 2022/9

Y1 - 2022/9

N2 - The low tolerance of marine microalgae to ammonium and hyposalinity limits their use in urban wastewater (UWW) treatments. In this study, using the marine microalga Amphidinium carterae, it is demonstrated for the first time that this obstacle can be overcome by introducing a zeolite-based adsorption step to obtain a tolerable UWW stream. The maximum ammonium adsorption capacities measured in the natural zeolite used are among the highest reported. The microalga grows satisfactorily in mixtures of zeolite-treated UWW and seawater at a wide range of proportions, both with and without adjusting the salinity, as long as the ammonium concentration is below the threshold tolerated by the microalgae (6.3 mg L−1). A proof of concept performed in 10-L bubble column photobioreactors with different culture strategies, including medium recycling, showed an enhanced biomass yield relative to a control with no UWW. No noticeable effect was observed on the production of specialty metabolites.

AB - The low tolerance of marine microalgae to ammonium and hyposalinity limits their use in urban wastewater (UWW) treatments. In this study, using the marine microalga Amphidinium carterae, it is demonstrated for the first time that this obstacle can be overcome by introducing a zeolite-based adsorption step to obtain a tolerable UWW stream. The maximum ammonium adsorption capacities measured in the natural zeolite used are among the highest reported. The microalga grows satisfactorily in mixtures of zeolite-treated UWW and seawater at a wide range of proportions, both with and without adjusting the salinity, as long as the ammonium concentration is below the threshold tolerated by the microalgae (6.3 mg L−1). A proof of concept performed in 10-L bubble column photobioreactors with different culture strategies, including medium recycling, showed an enhanced biomass yield relative to a control with no UWW. No noticeable effect was observed on the production of specialty metabolites.

KW - Adsorption

KW - Ammonium

KW - Microalga

KW - Photobioreactor

KW - Wastewater treatment

KW - Zeolite

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DO - 10.1016/j.biortech.2022.127490

M3 - Artículo

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AN - SCOPUS:85132724823

SN - 0960-8524

VL - 359

JO - Bioresource Technology

JF - Bioresource Technology

M1 - 127490

ER -

Treatment of secondary urban wastewater with a low ammonium-tolerant marine microalga using zeolite-based adsorption

Abstract

Keywords

UN SDGs

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