A step-forward in the characterization of microalgal consortia: Microbiological and kinetic aspects

Coronado-Apodaca, Karina G.; Vital‐Jácome, Miguel; Buitrón, Germán; Quijano, Guillermo

doi:10.1016/j.bej.2019.02.021

Cited by 6 publications

(3 citation statements)

References 45 publications

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“…Moreover, recent studies have proved that microalgae biomass and composition, such as lipid composition, can be adjusted under physiological stress conditions, namely nitrogen depletion with increased salinity and/or increased salinity with temperature shock (Markou et al 2016 ; Anitha et al 2018 ). In non-axenic production processes, both microalgal and bacterial communities play key roles (Coronado-Apodaca et al 2019 ), and the combination of different microalgal species can provide a balanced diet and improve animal growth and welfare (Spolaore et al 2006 ; Cardinaletti et al 2018 ). Cultivating microalgae in a high-rate algal pond (HRAP) system is a simple and economic way to produce valuable biomass to be included in aquafeeds.…”

Section: Introductionmentioning

confidence: 99%

Potential application and beneficial effects of a marine microalgal biomass produced in a high-rate algal pond (HRAP) in diets of European sea bass, Dicentrarchus labrax

Pascon

Messina

Petit

et al. 2021

Environ Sci Pollut Res

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Microalgae have been used as live food in aquatic species. In recent years, the interest in microalgae has considerably increased, thanks to the evolution of production techniques that have identified them as an ecologically attractive aquafeed ingredient. The present study provides the first data about the effects of dietary inclusion of a microalgae consortium grown in a high-rate algal pond system on zootechnical performance, morphometric indices, and dietary nutrient digestibility as well as morphology and functionality of the digestive system of European sea bass, Dicentrarchus labrax. A dietary treatment including a commercial mono-cultured microalgae (Nannochloropsis sp.) biomass was used for comparison. Six hundred and thirty-six European sea bass juveniles (18 ± 0.28 g) were randomly allotted into 12 experimental groups and fed 4 different diets for 10 weeks: a control diet based on fish meal, fish oil, and plant protein sources; a diet including 10% of Nannochloropsis spp. biomass (100 g/kg diet); and two diets including two levels (10% and 20%) of the microalgal consortium (100 and 200 g/kg diet). Even at the highest dietary inclusion level, the microalgal consortium (200 g/kg diet) did not affect feed palatability and fish growth performance. A significant decrease in the apparent digestibility of dry matter, protein, and energy was observed in diets including 10 and 20% of the microalgal consortium, but all fish exhibited a well-preserved intestinal histomorphology. Moreover, dietary inclusion with the microalgal consortium significantly increased the enzymatic activity of maltase, sucrase-isomaltase, and ɤ-glutamil transpeptidase in the distal intestine of the treated European sea bass. Algal consortium grown using fish farm effluents represents an attempt to enhance the utilization of natural biomasses in aquafeeds when used at 10 % as substitute of vegetable ingredients in diet for European sea bass.

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Section: Introductionmentioning

confidence: 99%

Potential application and beneficial effects of a marine microalgal biomass produced in a high-rate algal pond (HRAP) in diets of European sea bass, Dicentrarchus labrax

Pascon

Messina

Petit

et al. 2021

Environ Sci Pollut Res

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“…Acutodesmus has been reported in cultures propagated from samples of the same geographic area (Querétaro, Mexico) and other regions characterized by high solar radiation 53 . The Acutodesmus genus is distinguished by tolerating irradiance values of up to 700 μmol m −2 s −1 54 . Chlorella tolerates a wide range of organic carbon sources and nutrient loadings, growing under mixotrophic or heterotrophic conditions, 55 explaining its prevalence during the two experimental phases.…”

Section: Resultsmentioning

confidence: 99%

“…53 The Acutodesmus genus is distinguished by tolerating irradiance values of up to 700 μmol m −2 s −1 . 54 Chlorella tolerates a wide range of organic carbon sources and nutrient loadings, growing under mixotrophic or heterotrophic conditions, 55 explaining its prevalence during the two experimental phases. Both Acutodesmus and Chlorella have been reported to be associated with the formation of MABAs; 47,56 however, the low difference in their relative abundance between phase I and phase II cannot be associated with the disaggregation of MABAs.…”

Section: Microbial Communitiesmentioning

confidence: 99%

Wastewater treatment potential, light penetration profile and biomass settling performance of a photo‐sequencing batch reactor

García

Valenzuela

Vargas

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND The performance of microalgal and bacterial systems devoted to wastewater treatment might be limited by the poor settling of microalgal biomass and the inhibition of nitrifying bacteria under high irradiance conditions. This work implemented a photo‐sequencing batch bioreactor (PSBR) treating medium‐ and low‐strength wastewaters. The impact of a short settling time on the formation of microalgal–bacterial aggregates (MABAs) was evaluated. Moreover, online photosynthetically active radiation (PAR) measurements at the bottom of the PSBR were used to identify potential nitrifying activity inhibition. RESULTS A chemical oxygen demand removal efficiency of up to 88% was obtained for the medium‐ and low‐strength wastewaters. Photoinhibition of the nitrifying activity was observed at PAR values from 73 to 480 μmol m−2 s−1, and it was confirmed under non‐limiting dissolved oxygen conditions. The PSBR operating conditions, including a short settling time (30 min) and treatment of medium‐strength wastewater, favored the rapid formation of MABAs in only 19 days, with a biomass settling velocity (vs) of 0.74 m h−1. The microalgal genera Acutudesmus, Desmodesmus, and Chlorella were predominant in the MABAs. Experimental estimation of the light extinction coefficient (λ = 0.056 m2 g−1 total suspended solids) allowed the simulation of light penetration profiles at different reactor liquid depths and biomass concentrations. CONCLUSION A short settling time favors the rapid formation of MABAs in PSBR‐type reactors treating medium‐strength wastewater. Online monitoring and simulation of light penetration is a valuable tool to determine photoinhibition of the nitrifying activity in microalgal and bacterial systems. © 2022 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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CO2 Biofixation via Spirulina sp. Cultures: Evaluation of Initial Biomass Concentration in Tubular and Raceway Photobioreactors

2020

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A step-forward in the characterization of microalgal consortia: Microbiological and kinetic aspects

Cited by 6 publications

References 45 publications

Potential application and beneficial effects of a marine microalgal biomass produced in a high-rate algal pond (HRAP) in diets of European sea bass, Dicentrarchus labrax

Potential application and beneficial effects of a marine microalgal biomass produced in a high-rate algal pond (HRAP) in diets of European sea bass, Dicentrarchus labrax

Wastewater treatment potential, light penetration profile and biomass settling performance of a photo‐sequencing batch reactor

CO2 Biofixation via Spirulina sp. Cultures: Evaluation of Initial Biomass Concentration in Tubular and Raceway Photobioreactors

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