Mixotrophic cultivation of microalgae coupled with anaerobic hydrolysis for sustainable treatment of municipal wastewater in a hybrid system of anaerobic membrane bioreactor and membrane photobioreactor

Gao, Feng; Yang, Zi-Yan; Zhao, Qiaoling; Chen, Dongzhi; Li, Chen; Liu, Mei; Yang, Jinsheng; Liu, Junzhi; Ge, Yaming; Chen, Jianmeng

doi:10.1016/j.biortech.2021.125457

Cited by 48 publications

(10 citation statements)

References 47 publications

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“…AnMBR technology yields energy rich biogas (methane, CH 4 ) as a co-product of wastewater treatment, however, with a high percentage of carbon dioxide (CO 2 ) (Viruela et al, 2016). Additionally, residual ammonium and phosphate remain in waters after AnMBR treatment at levels that prohibit direct discharge into the environment (Gao et al, 2021;Xiong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Coupling AnMBR WW treatment with downstream cultivation of algae in photobioreactors has been proposed as an additional process step (Chaudry, 2021;Ding et al, 2022;Gao et al, 2021;Leite et al, 2019). Using energy from photosynthesis, microalgae consume CO 2 as a carbon source, ammonium and phosphate as nitrogen (N) and phosphorous (P) sources, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Biomass generation and heterologous isoprenoid milking from engineered microalgae grown in anaerobic membrane bioreactor effluent

Freitas¹,

Overmans²,

Medina³

et al. 2023

Water Research

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biomass generation and heterologous isoprenoid milking from engineered microalgae grown in anaerobic membrane bioreactor effluent

Freitas¹,

Overmans²,

Medina³

et al. 2023

Water Research

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“…Ammonium and phosphate are also left in waters after AnMBR treatment, usually at levels that prohibit direct discharge into the environment (Gao et al, 2021;Xiong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…AnMBR technology yields biogas (methane, CH 4 ) as a co-product of wastewater treatment, however, with a high percentage of carbon dioxide (CO 2 ) which can be scrubbed to enrich methane for improved combustion. Ammonium and phosphate are also left in waters after AnMBR treatment, usually at levels that prohibit direct discharge into the environment (Gao et al, 2021; Xiong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Biomass generation and heterologous isoprenoid milking from engineered microalgae grown in anaerobic membrane bioreactor effluent

Freitas

Overmans

Medina

et al. 2022

Preprint

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Wastewater (WW) treatment in anaerobic membrane bioreactors (AnMBR) is considered more sustainable than in their aerobic counterparts. However, outputs from AnMBR are mixed methane and carbon dioxide gas streams as well as ammonium- (N) and phosphate- (P) containing waters. Using AnMBR outputs as inputs for photoautotrophic algal cultivation can strip the CO2 and remove N and P from effluent which feed algal biomass generation. Recent advances in algal engineering have generated strains for concomitant high-value side product generation in addition to biomass, although only shown in heavily domesticated, lab-adapted strains. Here, investigated whether such a strain of Chlamydomonas reinhardtii could be grown directly in AnMBR effluent with CO2 at concentrations found in its off-gas. The domesticated strain was found to proliferate over bacteria in the non-sterile effluent, consume N and P to levels that meet general discharge or reuse limits, and tolerate cultivation in modelled (extreme) outdoor environmental conditions prevalent along the central Red Sea coast. High-value co-product milking was then demonstrated, up to 837 micro g / L culture in 96 h, in addition to algal biomass production, ~2.4 g CDW / L in 96 h, directly in effluents. This is the first demonstration of a combined bio-process that employs a heavily engineered algal strain to enhance the product generation potentials from AnMBR effluent treatment. This study shows it is possible to convert waste into value through use of engineered algae while also improve wastewater treatment economics through co-product generation.

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“…Para línea de color verde está representada el flujo de los nutrientes por vía mixotrófico, en este punto la mayoría de las microalgas pueden desarrollarse mixotróficamente, ya que solo necesita consumir el carbono orgánico (los azúcares, acetato, glicerol y entre otras.) y el carbono inorgánico en presencia de la irradiación de fotones (luz) (Gao et al, 2021). Finalmente, la línea de color celeste está representada por el flujo de nutrientes en el proceso heterótrofos, en este punto ciertas microalgas también son capaces de aprovechar el carbono orgánica en ausencia de luz (oscuridad) para producir su propia biomasa y generar CO2 como las bacterias heterótrofas (Murwanashyaka et al, 2020).…”

Section: Mecanismo De Crecimiento De Las Microalgas En El Tratamiento...unclassified

Tratamiento de aguas residuales con el uso de la microalga Chlorella vulgaris para la remoción de materia orgánica

Moreno¹

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La utilización de la microalga Chlorella vulgaris son una opción ecoamigable y rentable principalmente si se integra en la depuración del agua residual empleando la materia orgánica y nutriente presente del agua como medio de cultivo. Es así, que el objetivo en este estudio fue evaluar la eficiencia de remoción de materia orgánica mediante el uso de la microalga C. vulgaris en las aguas residuales municipales del distrito de Monzón (Huánuco). Para determinar la capacidad de remoción se empleó un sistema de crecimiento de cultivo llamado “Biorreactor” por un periodo de 17 días donde el análisis físico-químico de las muestras a tratar fueron antes y después del experimento, asimismo se monitoreó diariamente el crecimiento de la microalga a través de la cuantificación de peso seco, velocidad especifica de crecimiento, productividad, temperatura, pH y las lecturas de absorbancia. El experimento contó con tres unidades experimentales sin el agua residual y tres unidades con el agua residual a una concentración de 21%. Los valores de porcentaje de remoción para el DQO, DBO, fosfato y nitrato fueron -293.0%, 41.9%, 69.13% y -107 592%, respectivamente. Donde el valor negativo del DQO se relacionó con la descomposición de las microalgas viejas a través de las bacterias y la liberación de la materia orgánica (sustancias poliméricas extracelulares ) luego que las microalgas fijaran el CO2, y para el valor negativo de nitrato se relacionó con la presencia de bacterias nitrificantes (BN). Por otra parte, los metales pesados como Ni, Cr, Pb y Cd fueron ligeramente superiores al Límite Máximo-Permisible (LMP).En conclusión, se ha demostrado que, si es posible la biorremediación de aguas residuales municipales a partir del cultivo de C. vulgaris.

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Mixotrophic cultivation of microalgae coupled with anaerobic hydrolysis for sustainable treatment of municipal wastewater in a hybrid system of anaerobic membrane bioreactor and membrane photobioreactor

Cited by 48 publications

References 47 publications

Biomass generation and heterologous isoprenoid milking from engineered microalgae grown in anaerobic membrane bioreactor effluent

Biomass generation and heterologous isoprenoid milking from engineered microalgae grown in anaerobic membrane bioreactor effluent

Biomass generation and heterologous isoprenoid milking from engineered microalgae grown in anaerobic membrane bioreactor effluent

Tratamiento de aguas residuales con el uso de la microalga Chlorella vulgaris para la remoción de materia orgánica

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