Microalgal interstrains differences in algal-bacterial biofloc formation during liquid digestate treatment

Wang, Hong; Qi, Bufan; Jiang, Xiaomei; Jiang, Yiqi; Yang, Hanbo; Xiao, Youqian; Jiang, Na; Deng, Liangwei; Wang, Wenguo

doi:10.1016/j.biortech.2019.121741

Cited by 26 publications

(11 citation statements)

References 46 publications

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“…BWY-1( Chlorella ) was isolated from liquid digestate of pig farms. In our previous studies, we found a great bioflocculation phenomenon during the cultivation of Chlorella using an effluent of liquid digestate from a sequencing batch reactor (SBR). , The SBR achieved nutrient removal and nitrification by aerobic activated sludge . However, liquid digestate loads many suspended substances and organic matter, which would have negative effects on EPS analysis during the following investigation of the bioflocculation mechanism.…”

Section: Methodsmentioning

confidence: 99%

“…Concentrations of NH 4 + -N, NO 2 – -N, and NO 3 – -N in the SBR.E were 50 ± 9.64, 1.20 ± 1.05, and 150 ± 12.43 mg/L, respectively. Concentrations of NH 4 + -N and NO 3 – -N in the SBR.E were referred from a microalgal–bacterial bioflocculation system in our previous research . The pH value of the SBR.E was adjusted to 7.10 ± 0.5 using 1 M NaOH.…”

Section: Methodsmentioning

confidence: 99%

“…The Chlorella axenic cells were treated in the same manner. Finally, Chlorella axenic cells and bioflocs were observed under an inverted fluorescence microscope (Lecia, DMI40008) …”

Section: Methodsmentioning

confidence: 99%

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N-Acyl-Homoserine Lactone (AHL)-Mediated Microalgal–Bacterial Communication Driving Chlorella-Activated Sludge Bacterial Biofloc Formation

Wang

Zheng

et al. 2022

Environ. Sci. Technol.

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N-acyl-homoserine lactones (AHLs) as autoinducers of Gramnegative bacteria for quorum sensing regulation have shown positive effects on the production of aromatic proteins in extracellular polymeric substances (EPSs) during bioflocculation. To investigate the role of AHLs in aromatic protein production, a Chlorella−bacteria system with great bioflocculation was established via fed-batch cultivation. Tryptophan and aromatic proteins as the main compounds in the EPS of bioflocs showed an increasing trend during fed-batch cultivation. The Chlorella cells only secreted tryptophan rather than aromatic proteins during axenic cultivation. N-dodecanoyl-L-homoserine lactone (C12-HSL) was correlated with the flocculation activity and extracellular protein content of bioflocs during fed-batch cultivation. The addition of exogenous C12-HSL enhanced the flocculation activity of the Chlorella−bacteria system and aromatic protein production in the EPS. Chlorella cells sensed exogenous C12-HSL and significantly upregulated the aromatic protein synthesis pathway during axenic cultivation. In addition, vanillin as a quorum-sensing inhibitor suppressed the positive effect of C12-HSL on flocculation activity and aromatic protein production and synthesis. This result indicated that vanillin intercepts the response of Chlorella cells to C12-HSL. Overall, C12-HSL is supposed to be an important signal molecule to achieve communication between Chlorella and Gram-negative bacteria and subsequently induce Chlorella cells to produce aromatic proteins for biofloc formation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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N-Acyl-Homoserine Lactone (AHL)-Mediated Microalgal–Bacterial Communication Driving Chlorella-Activated Sludge Bacterial Biofloc Formation

Wang

Zheng

et al. 2022

Environ. Sci. Technol.

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“…Wang et al [25] examined the algal-bacterial bioflocculation induced by strains of Scenedesmus obliquus, Botryococcus braunii, Chlorella sp. BWY-1, Haematococcus pluvialis, Dictyosphaerium ehnenbergianum, and Chlorella vulgaris.…”

Section: Potentiality Of Microalgal Polysaccharides In Bioflocculationmentioning

confidence: 99%

Recent Advances of Microalgae Exopolysaccharides for Application as Bioflocculants

et al. 2022

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Microalgae are used in flocculation processes because biopolymers are released into the culture medium. Microalgal cell growth under specific conditions (temperature, pH, luminosity, nutrients, and salinity) provides the production and release of exopolysaccharides (EPS). These biopolymers can be recovered from the medium for application as bioflocculants or used directly in cultivation as microalgae autoflocculants. The optimization of nutritional parameters, the control of process conditions, and the possibility of scaling up allow the production and industrial application of microalgal EPS. Therefore, this review addresses the potential use of EPS produced by microalgae in bioflocculation. The recovery, determination, and quantification techniques for these biopolymers are also addressed. Moreover, other technological applications of EPS are highlighted.

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“…Si bien durante los primeros 10 años (2000-2010) las publicaciones en torno a esta microalga no superaron la barrera de los 30 documentos por año, en el año 2011 se puede apreciar un crecimiento exponencial (de 20 a mas de 50 documentos anuales), seguido de un nivel constante de publicaciones anuales hasta una reducción significativa en los últimos 2 años (2020-2021). Cabe resaltar que la mayor cantidad de publicaciones se concentra en países como Alemania [22][23][24][25]; Australia [26]; Brasil [13,[27][28][29][30]; Chile [31,32]; China [33][34][35][36][37][38][39][40][41][42][43][44]; Colombia [12]; Francia [45][46][47]; India [48][49][50][51][52][53]; Inglaterra [54], Japón [55][56][57][58][59][60][61][62][63][64][65]…”

Section: Análisis Bibliométricounclassified

Análisis De Las Aplicaciones De La Microalga Botryococcus Braunii En Procesos Industriales

Barajas-Solano

2021

Cienc. En Desarro.

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Las microalgas son microorganismos fotosintéticos los cuales pueden ser eucariotas (algas) o procariotas (cianobacterias) y pueden estar presentes en todos los hábitats de la tierra. Este artículo ofrece una descripción bibliográfica sobre análisis técnicos en la producción industrial de los principales metabolitos extraídos de Botryococcus braunii con el objetivo de analizar, determinar e identificar los avances científicos para la utilización de esta alga como un recurso potencial, por medio de una recopilación bibliométrica de 20 años sobre artículos de investigaciones demostrando gran interés en el campo de las microalgas. Se ha realizado este trabajo con el propósito de averiguar los estudios en el área de la microalga Botryococcus braunii y sus aplicaciones industriales, también determinar los principales metabolitos como hidrocarburos, exopolisacáridos, carotenoides, proteínas, en el aprovechamiento de procesos industriales como materiales, alimentos, productos farmacéuticos, nanopartículas y biocombustibles. Debido a sus vías metabólicas particulares, su adaptabilidad fisiológica y su uso en sistemas de cultivo avanzados, existe un gran potencial para producir sustancias químicas de alto valor a partir de cepas de Botryococcus braunii.

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Microalgal interstrains differences in algal-bacterial biofloc formation during liquid digestate treatment

Cited by 26 publications

References 46 publications

N-Acyl-Homoserine Lactone (AHL)-Mediated Microalgal–Bacterial Communication Driving Chlorella-Activated Sludge Bacterial Biofloc Formation

N-Acyl-Homoserine Lactone (AHL)-Mediated Microalgal–Bacterial Communication Driving Chlorella-Activated Sludge Bacterial Biofloc Formation

Recent Advances of Microalgae Exopolysaccharides for Application as Bioflocculants

Análisis De Las Aplicaciones De La Microalga Botryococcus Braunii En Procesos Industriales

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