Utilization of food waste in continuous flow cultures of the heterotrophic microalga Chlorella pyrenoidosa for saturated and unsaturated fatty acids production

Pleißner, Daniel; Lau, Kin Yan; Lin, Carol Sze Ki

doi:10.1016/j.jclepro.2016.11.165

Cited by 54 publications

(12 citation statements)

References 22 publications

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“…The growth characteristics and composition of algal cells are known to significantly relate to the cultivation conditions . Some microalgae species can grow not only in photoautotrophic conditions but also in heterotrophic or mixotrophic conditions with organic carbon as energy and carbon source . By using organic carbon sources in heterotrophic or mixotrophic cultures, the key problems associated with limited light that hinder high cell density during photoautotrophic cultivation can be overcome .…”

Section: Introductionmentioning

confidence: 99%

Effects of organic matters in domestic wastewater on lipid/carbohydrate production and nutrient removal of Chlorella vulgaris cultivated under mixotrophic growth conditions

Peng

Gao

Hang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The combination of wastewater treatment and algal biofuel production has received increasing attention in recent years owing to its many advantages. In order to clarify the influence of different organic pollutants such as carbohydrates, volatile fatty acids (VFAs) and proteins in domestic wastewater on the cultivation of Chlorella vulgaris, three simulated domestic sewages containing glucose, sodium acetate (NaAc) and protein respectively were prepared in this study to culture C. vulgaris in mixotrophic way. RESULTS:The biomass productivities of C. vulgaris cultured in wastewaters containing glucose and NaAc were 63.5 and 55.2 mg L −1 day −1 respectively, which were 2.61-and 2.27-fold larger than that achieved in photoautotrophic condition. Owing to the higher biomass productivity, better performance of nutrient removal was also achieved in wastewater containing glucose or NaAc. Different from glucose and NaAc, protein in the wastewater had no significant effect on C. vulgaris growth and nutrient removal. Chlorella vulgaris cultured in NaAc and glucose wastewaters achieved the highest lipid (17.35 mg L −1 day −1 ) and carbohydrate (18.75 mg L −1 day −1 ) productivities respectively, indicating that wastewater containing these two organic substances has certain advantages in microalgal liquid biofuel production. CONCLUSIONS: Organic matters in wastewater have important effects on microalgae growth and the chemical composition of algal cells. Carbohydrates and VFAs in wastewater can significantly promote the growth of C. vulgaris and promote the accumulation of lipid by microalgae. AnalysisThe microalgae concentration was determined using the optical density of the microalgae culture at 680 nm (OD 680 ). According to a previous study, the relationship between the dry biomass J Chem Technol Biotechnol 2019; 94: [3578][3579][3580][3581][3582][3583][3584]

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Section: Introductionmentioning

confidence: 99%

Effects of organic matters in domestic wastewater on lipid/carbohydrate production and nutrient removal of Chlorella vulgaris cultivated under mixotrophic growth conditions

Peng

Gao

Hang

et al. 2019

J of Chemical Tech & Biotech

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“…One more advantage of using hydrolysate medium is that it is cheap compared to other growth media, and is produced from a waste source. Comparison of biomass productivity of different algal species [9,24,29,[34][35][36][37][38][39][40][41][42][43][44][45] with the present study (dashed line represents the average value).…”

Section: Coupled Effect Of Light Intensity and Carbon Source On Bioma...mentioning

confidence: 62%

Biomass and Lipid Productivity by Two Algal Strains of Chlorella sorokiniana Grown in Hydrolysate of Water Hyacinth

et al. 2021

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Hydrolysate prepared from the chemical hydrolysis of water hyacinth biomass contains a high amount of solubilised carbohydrate and nutrients. This hydrolysate was utilised as a medium for the cultivation of two strains of Chlorella sorokiniana, isolated from a municipal wastewater treatment plant using two different media, i.e., BG-11 and Knop’s medium. Different light intensities, light–dark cycles, and various concentrations of external carbon sources (monosaccharides and inorganic carbon) were used to optimise the microalgal growth. For the accumulation of lipids and carbohydrates, the microalgal strains were transferred to nutrient amended medium (N-amended and P-amended). It was observed that the combined effect of glucose, inorganic carbon, and a 12:12 h light–dark cycle proved to be the optimum parameters for high biomass productivity (~200 mg/L/day). For Chlorella sorokiniana 1 (isolated from BG-11 medium), the maximum carbohydrate content (22%) was found in P-amended medium (N = 0 mg/L, P: 3 mg/L), whereas, high lipid content (17.3%) was recorded in N-amended medium (N = 5 mg/L, P = 0 mg/L). However, for Chlorella sorokiniana 2 (isolated from the Knop’s medium), both lipid (17%) and carbohydrate accumulation (12.3%) were found to be maximum in the N-amended medium. Chlorella sorokiniana 2 showed a high saturated lipid accumulation compared to other strains. Kinetic modelling of the lipid profile revealed that the production rate of fatty acids and their various constituents were species dependent under identical conditions.

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“…It has been reported that the environmental impact of commercial algal biorefinery (producing n-3 fatty acids, biofuel, and high protein products) is similar to that of traditional fish production [284]. In heterotrophic and mixed-nutrient microalgae culture, food wastes and food by-products (such as cheese whey permeate and molasses) are good sources of organic carbon and nutrients of microalgae [285,286]. When used to support algae growth, their impacts on the environment are reduced.…”

Section: Environmental Sustainabilitymentioning

confidence: 99%

Health Benefits, Food Applications, and Sustainability of Microalgae-Derived N-3 PUFA

Liu¹,

Ren²,

Fan³

et al. 2022

Foods

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Today’s consumers are increasingly aware of the beneficial effects of n-3 PUFA in preventing, delaying, and intervening various diseases, such as coronary artery disease, hypertension, diabetes, inflammatory and autoimmune disorders, neurodegenerative diseases, depression, and many other ailments. The role of n-3 PUFA on aging and cognitive function is also one of the hot topics in basic research, product development, and clinical applications. For decades, n-3 PUFA, especially EPA and DHA, have been supplied by fish oil and seafood. With the continuous increase of global population, awareness about the health benefits of n-3 PUFA, and socioeconomic improvement worldwide, the supply chain is facing increasing challenges of insufficient production. In this regard, microalgae have been well considered as promising sources of n-3 PUFA oil to mitigate the supply shortages. The use of microalgae to produce n-3 PUFA-rich oils has been explored for over two decades and some species have already been used commercially to produce n-3 PUFA, in particular EPA- and/or DHA-rich oils. In addition to n-3 PUFA, microalgae biomass contains many other high value biomolecules, which can be used in food, dietary supplement, pharmaceutical ingredient, and feedstock. The present review covers the health benefits of n-3 PUFA, EPA, and DHA, with particular attention given to the various approaches attempted in the nutritional interventions using EPA and DHA alone or combined with other nutrients and bioactive compounds towards improved health conditions in people with mild cognitive impairment and Alzheimer’s disease. It also covers the applications of microalgae n-3 PUFA in food and dietary supplement sectors and the economic and environmental sustainability of using microalgae as a platform for n-3 PUFA-rich oil production.

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Utilization of food waste in continuous flow cultures of the heterotrophic microalga Chlorella pyrenoidosa for saturated and unsaturated fatty acids production

Cited by 54 publications

References 22 publications

Effects of organic matters in domestic wastewater on lipid/carbohydrate production and nutrient removal of Chlorella vulgaris cultivated under mixotrophic growth conditions

Effects of organic matters in domestic wastewater on lipid/carbohydrate production and nutrient removal of Chlorella vulgaris cultivated under mixotrophic growth conditions

Biomass and Lipid Productivity by Two Algal Strains of Chlorella sorokiniana Grown in Hydrolysate of Water Hyacinth

Health Benefits, Food Applications, and Sustainability of Microalgae-Derived N-3 PUFA

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