Use of Microalgae Pigments in Aquaculture

Yusoff, Fatimah Md.; Banerjee, Sanjoy; Nagao, Norio; Imaizumi, Yuki; Shariff, Mohamed; Toda, Tatsuki

doi:10.1007/978-3-030-50971-2_19

Cited by 14 publications

(9 citation statements)

References 158 publications

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“…Gao et al (2010) also reported that at low to neutral initial solution pH (4-7), cell density of algae was effectively removed [87]. The performance, however, worsened with an initial pH increase (7)(8)(9)(10). A contradictory result was reported by Kim et al (2012), who by employing a continuous process, rather found that microalgae removal efficiency, increased at a higher pH of 8 within the first 5 min of operation [79].…”

Section: Electrolyte And/or Microalgal Broth Conditionsmentioning

confidence: 97%

“…These microalgae are an excellent source of bioactive compounds for the production of a wide range of vital consumer products in the biofuel [2], pharmaceutical [3], food [4], cosmetics [5], and agricultural industries [6], in addition to huge upstream benefits relating to carbon dioxide (CO 2 ) biosequestration and wastewater treatment [7]. According to market research (United States), the global compound annual growth rate (CAGR) of microalgae between the year 2017 and 2026 is estimated at 4.6% [8]. Furthermore, it is estimated that the revenue from the global sales of microalgae will exceed USD 75 million by the end of the year 2026 [9].…”

Section: Introductionmentioning

confidence: 99%

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Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

et al. 2020

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Microalgae are an excellent source of bioactive compounds for the production of a wide range of vital consumer products in the biofuel, pharmaceutical, food, cosmetics, and agricultural industries, in addition to huge upstream benefits relating to carbon dioxide biosequestration and wastewater treatment. However, energy-efficient, cost-effective, and scalable microalgal technologies for commercial-scale applications are limited, and this has significantly impacted the full-scale implementation of microalgal biosystems for bioproduct development, phycoremediation, and biorefinery applications. Microalgae culture dewatering continues to be a major challenge to large-scale biomass generation, and this is primarily due to the low cell densities of microalgal cultures and the small hydrodynamic size of microalgal cells. With such biophysical characteristics, energy-intensive solid–liquid separation processes such as centrifugation and filtration are generally used for continuous generation of biomass in large-scale settings, making dewatering a major contributor to the microalgae bioprocess economics. This article analyzes the potential of electroflotation as a cost-effective dewatering process that can be integrated into microalgae bioprocesses for continuous biomass production. Electroflotation hinges on the generation of fine bubbles at the surface of an electrode system to entrain microalgal particulates to the surface. A modification of electroflotation, which combines electrocoagulation to catalyze the coalescence of microalgae cells before gaseous entrainment, is also discussed. A technoeconomic appraisal of the prospects of electroflotation compared with other dewatering technologies is presented.

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Section: Electrolyte And/or Microalgal Broth Conditionsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

et al. 2020

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“…Astaxanthin or (3,3 -dihydroxyβ, β-1-carotene-4,4 -dione) is a secondary carotenoid with bright blood-red color, which can be synthesized directly by exerting cellular stresses onto H. pluvialis [4,5]. Most astaxanthin Biomolecules 2021, 11, 256 2 of 15 applications are related to human nutrition and health in the form of food, pharmaceuticals, nutraceuticals, and dietary supplements [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Review on Haematococcus pluvialis Bioprocess Optimization of Green and Red Stage Culture Conditions for the Production of Natural Astaxanthin

et al. 2021

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As the most recognizable natural secondary carotenoid astaxanthin producer, the green microalga Haematococcus pluvialis cultivation is performed via a two-stage process. The first is dedicated to biomass accumulation under growth-favoring conditions (green stage), and the second stage is for astaxanthin evolution under various stress conditions (red stage). This mini-review discusses the further improvement made on astaxanthin production by providing an overview of recent works on H. pluvialis, including the valuable ideas for bioprocess optimization on cell growth, and the current stress-exerting strategies for astaxanthin pigment production. The effects of nutrient constituents, especially nitrogen and carbon sources, and illumination intensity are emphasized during the green stage. On the other hand, the significance of the nitrogen depletion strategy and other exogenous factors comprising salinity, illumination, and temperature are considered for the astaxanthin inducement during the red stage. In short, any factor that interferes with the cellular processes that limit the growth or photosynthesis in the green stage could trigger the encystment process and astaxanthin formation during the red stage. This review provides an insight regarding the parameters involved in bioprocess optimization for high-value astaxanthin biosynthesis from H. pluvialis.

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“…Harmful environmental effects can be neutralized by using nutritional supplements that exhibit strong antioxidant capacities [3,8,13]. In the aquaculture industry, xanthophylls such as astaxanthin (Ax) and canthaxanthin (Cx) have been included in the diets of salmonids to provide a desirable coloration to these cultured organisms and to protect them from various diseases [14][15][16][17]. Salmonids are able to absorb them from their diet [18].…”

Section: Introductionmentioning

confidence: 99%

Accumulation of Astaxanthin and Canthaxanthin in Liver and Gonads of Rainbow Trout (Oncorhynchus mykiss (Walbaum, 1792)) Reared in Water Containing the Fungicide Mancozeb in Concentration Level Permitted by European Legislation

et al. 2022

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In this study, we studied the levels of both of the main pigments in Salmonidae—astaxanthin (Ax) and canthaxanthin (Cx)—accumulated in the liver, female gonads, and male gonads of rainbow trout (Oncorhynchus mykiss) reared in water containing the fungicide mancozeb (MZ) in concentration levels permitted by European legislation. Experimental fish were divided into three groups: the first was a control group, the second was fed with market feed (containing Ax and Cx), and the third was fed with market feed (containing Ax and Cx) and reared in environmental water containing permissible MZ levels. The diet preparation followed the manufacturer’s recommendations. The accumulated pigment quantities were measured using an HPLC-PDA method after selective extraction: Ax ranged from 2.490 ± 0.247 mg/kg (female gonads, second group) to 0.176 ± 0.007 mg/kg (liver, control group), and Cx—from 2.406 ± 0.166 mg/kg (female gonads, second group) to 0.103 ± 0.010 mg/kg (liver, control group). The pattern of the accumulation of both pigments in the three organs in the specimens of the three groups was sustainable: the amount of Ax was always greater than that of Cx, and the correlation between their concentrations was very high. The pigments were accumulated most intensively in the female gonads, followed by the male gonads and the liver. This trend was confirmed for all three experimental groups. However, the differences in the last third group were very small, and the levels of the xanthophylls accumulated were the lowest. A particular cause of the latter findings was the ongoing detoxification reactions and the disposal of MZ, in which Ax and Cx were involved as antioxidants.

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Use of Microalgae Pigments in Aquaculture

Cited by 14 publications

References 158 publications

Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

A Review on Haematococcus pluvialis Bioprocess Optimization of Green and Red Stage Culture Conditions for the Production of Natural Astaxanthin

Accumulation of Astaxanthin and Canthaxanthin in Liver and Gonads of Rainbow Trout (Oncorhynchus mykiss (Walbaum, 1792)) Reared in Water Containing the Fungicide Mancozeb in Concentration Level Permitted by European Legislation

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