Integrated production of long chain polyunsaturated fatty acids (PUFA)-rich Schizochytrium biomass using a nutrient supplemented marine aquaculture wastewater

Jung, Ilseon; Lovitt, Robert W.

doi:10.1016/j.aquaeng.2010.05.004

Cited by 22 publications

(12 citation statements)

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“…Accordingly, new sources of n-3 LC-PUFAs are being investigated, and recently, other sources of n-3 PUFAs have been considered. For example, Schizochytrium limacinum is a marine microalga that can produce DHA or EPA [32]. Conchillo et al [33] compared both microalgae oil and fish oil composition and found that DHA and EPA were the major fatty acids in them, respectively.…”

Section: Introductionmentioning

confidence: 99%

n-3 PUFA Sources (Precursor/Products): A Review of Current Knowledge on Rabbit

Rodríguez

Rebollar

Mattioli

et al. 2019

Animals

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Simple SummaryThe nutritional quality of fat for human consumption is usually evaluated in terms of the n-6/n-3 polyunsaturated fatty acid (PUFA) ratio (with optimal values ≤4). Moreover, with respect to animal production, the standard feed is unbalanced in terms of n-6/n-3 polyunsaturated fatty acids (PUFAs) with a lower proportion of the latter. Such discrepancy negatively affects the health status of animals, the productive and reproductive performances, and the general quality of their products. Hence, n-3 PUFA intake should be promoted. The increase in n-3 PUFA proportions in animal products would also be in accordance with the human dietary recommendations that often focus on the need of increasing the intake of long-chain n-3 PUFAs. In this regard, two main strategies could be implemented, namely to furnish precursor (α-linolenic acid) or long-chain derivatives (eicosapentaenoic and docosahexaenoic acids). In the present review, the effects of different n-3 PUFA sources on biological activity, physiological/reproductive endpoints, and health implications are compared focusing on the most recent results obtained in the rabbit.AbstractThis review compares the effects of different n-3 polyunsaturated fatty acid (PUFA) sources on biological activity, physiological/reproductive endpoints, and health implications with a special emphasis on a rabbit case study. Linoleic acid (LA) and α-linolenic acid (ALA) are members of two classes of PUFAs, namely the n-6 and n-3 series, which are required for normal human health. Both are considered precursors of a cascade of molecules (eicosanoids), which take part in many biological processes (inflammation, vasoconstriction/vasodilation, thromboregulation, etc.). However, their biological functions are opposite and are mainly related to the form (precursor or long-chain products) in which they were administered and to the enzyme–substrate preference. ALA is widely present in common vegetable oils and foods, marine algae, and natural herbs, whereas its long-chain PUFA derivatives are available mainly in fish and animal product origins. Recent studies have shown that the accumulation of n-3 PUFAs seems mostly to be tissue-dependent and acts in a tissue-selective manner. Furthermore, dietary n-3 PUFAs widely affect the lipid oxidation susceptibility of all tissues. In conclusion, sustainable sources of n-3 PUFAs are limited and exert a different effect about (1) the form in which they are administered, precursor or derivatives; (2) their antioxidant protections; and (3) the purpose to be achieved (health improvement, physiological and reproductive traits, metabolic pathways, etc.).

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Section: Introductionmentioning

confidence: 99%

n-3 PUFA Sources (Precursor/Products): A Review of Current Knowledge on Rabbit

Rodríguez

Rebollar

Mattioli

et al. 2019

Animals

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“…Yang et al . and Jung and Lovitt tested recycling the harvested water in microalgae cultivation with the main purpose of obtaining biodiesel and polyunsaturated fatty acids (PUFAs). González‐López et al .…”

Section: Introductionmentioning

confidence: 99%

Ferric sulfate coagulation and powdered activated carbon adsorption as simultaneous treatment to reuse the medium in Arthrospira platensis cultivation

Morocho‐Jácome

Sato

Carvalho

2015

J of Chemical Tech & Biotech

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BACKGROUND: Cyanobacteriae and microalgae industries require large amounts of water for their cultivation. Reusing the Arthrospira platensis culture medium is scarcely evaluated in the literature. This work evaluates coagulation and adsorption as a simultaneous process to treat A. platensis spent medium by applying different concentrations of powdered activated carbon (PAC) and ferric sulfate (S) and by using different contact times (T) to remove organic matter and pigments. RESULTS:The process efficiency was measured by removal of both organic matter and pigments by absorbance at 254 and 440 nm, respectively. The highest maximum cell concentration (4863 ± 64 mg L −1 ) and protein content values (60.0 ± 0.6%) were observed in a medium treated with optimal conditions using PAC = 40.0 mg L −1 , S = 32.8 mg L −1 and T = 36.1 min. Under such conditions, chlorophyll-a biomass content of 24.5 ± 0.6 mg g dry cell −1 and chlorophyll-a productivity of 16.8 ± 0.1 mg L −1 d −1 were obtained.CONCLUSIONS: Coagulation and adsorption as a simultaneus treatment allowing reuse of the spent medium of A. platensis cultivation can diminish not only its production costs but also environmental pollution. The biomass produced in the treated medium contains more protein and chlorophyll than that produced in the standard medium.

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“…Microfiltration pore size ranging from 0.1 µm to 1 µm allows smaller particles such as aqueous salts, small macromolecules, carbohydrates, proteins, metal ions and other inorganic and organic molecules to pass through formulating a sterile permeate effluent [16]. With larger particles removed these permeates can be further processed to recover useful nutrients as well as metal ions, or even used as substrates for microbial growth, which is an emerging option in the constantly evolving field of biotechnology [17].Several beneficial features lay in membrane processing, [18][19][20] including reuse and more economical disposal of waste [21,22], formulation of sterile streams [23] low pressure operation, ease of in-situ separation in addition to simple scale-up using commercial modules. These processes have shown treatment feasibility for several types of aqueous waste streams [24].…”

Section: Introductionmentioning

confidence: 99%

The filtration characteristics of anaerobic digester effluents employing cross flow ceramic membrane microfiltration for nutrient recovery

Zacharof

Lovitt

2014

Desalination

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In the present study, a monolithic alumina coated microfiltration ceramic membrane was used for solid particulates removal and nutrients recovery from anaerobic digester complex effluent streams. The aim was to test the effect of the cake layer developed by the solids, on the surface of the membrane channels, to the filterability of these materials. The solids content ranged between 2.6 g/L to 15.1 g/L. During practical application, two processing techniques targeting the enhanced recovery of the materials of interest including ammonia, phosphate, calcium bicarbonate and volatile fatty acids, namely dewatering and diafiltration, were used. These had an immediate effect on the solids content (PDS 13µm to 3.97µm) enhancing the filterability of the effluents. Their processability was evaluated in terms of flux, cross flow velocity, membrane resistance and cake resistance. Important findings of this study is the nonalignment of the flux rates to the cake resistance, explained by the formation of a compressible, permeable cake layer that allowed the continuous operation of the system, under constant low pressure conditions (TMP 15 psi). Permeate flux remained constant to 120 L/m 2 h when applying diafiltration, while when dewatering process is used the permeate flux remained constant at 115.4 L/m 2 h.

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Integrated production of long chain polyunsaturated fatty acids (PUFA)-rich Schizochytrium biomass using a nutrient supplemented marine aquaculture wastewater

Cited by 22 publications

References 50 publications

n-3 PUFA Sources (Precursor/Products): A Review of Current Knowledge on Rabbit

n-3 PUFA Sources (Precursor/Products): A Review of Current Knowledge on Rabbit

Ferric sulfate coagulation and powdered activated carbon adsorption as simultaneous treatment to reuse the medium in Arthrospira platensis cultivation

The filtration characteristics of anaerobic digester effluents employing cross flow ceramic membrane microfiltration for nutrient recovery

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