Recycling of lignocellulosic waste materials to produce high-value products: single cell oil and xylitol

Enshaeieh, Marjan; Abdoli, Azadeh; Madani, Mahboobeh; Bayat, Mansour

doi:10.1007/s13762-014-0687-8

Cited by 25 publications

(18 citation statements)

References 48 publications

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“…Microbial conversion of the biomass to liquid biofuel has been an attractive research area in recent years . Use of lignocellulosic biomass for production of high‐value lipids and chemicals has also received considerable attention, while there has been less interest in yeast biomass as an alternative protein source. Yeast cells are able to synthesise all precursors required for macromolecular constituents such as protein and nucleic acids from sugars and essential nutrients like nitrogen, inorganic phosphate and sulfate, and additional minerals and vitamins.…”

Section: Introductonmentioning

confidence: 99%

Yeast derived from lignocellulosic biomass as a sustainable feed resource for use in aquaculture

2016

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The global expansion in aquaculture production implies an emerging need of suitable and sustainable protein sources. Currently, the fish feed industry is dependent on high-quality protein sources of marine and plant origin. Yeast derived from processing of low-value and non-food lignocellulosic biomass is a potential sustainable source of protein in fish diets. Following enzymatic hydrolysis, the hexose and pentose sugars of lignocellulosic substrates and supplementary nutrients can be converted into protein-rich yeast biomass by fermentation. Studies have shown that yeasts such as Saccharomyces cerevisiae, Candida utilis and Kluyveromyces marxianus have favourable amino acid composition and excellent properties as protein sources in diets for fish, including carnivorous species such as Atlantic salmon and rainbow trout. Suitable downstream processing of the biomass to disrupt cell walls is required to secure high nutrient digestibility. A number of studies have shown various immunological and health benefits from feeding fish low levels of yeast and yeast-derived cell wall fractions. This review summarises current literature on the potential of yeast from lignocellulosic biomass as an alternative protein source for the aquaculture industry. It is concluded that further research and development within yeast production can be important to secure the future sustainability and economic viability of intensive aquaculture. © 2016 Society of Chemical Industry.

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Section: Introductonmentioning

confidence: 99%

Yeast derived from lignocellulosic biomass as a sustainable feed resource for use in aquaculture

2016

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“…These researches have laid a well foundation for recycling municipal and industrial wastes. A study from Iran has recycled lignocellulosic waste materials to produce high-value products (Enshaeieh et al 2015). A paper from Taiwan has used metal sludge mixed with mining residues to be recycled into lightweight aggregate (Huang et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Effects of recycled paperboard mill wastes on the properties of non-load-bearing concrete

Seyyedalipour

Kebria

Dehestani

2015

Int. J. Environ. Sci. Technol.

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Population growth and increasing demand for industrial enterprises such as pulp and paper production lead to environmental problems such as over-exploitation of resources and pollution of soil, air and water. Thus, for the importance of reducing the negative effects of incineration and landfilling of wastes for the protection of environment, two kinds of recycled paperboard mill wastes were used as partial replacement of sand (volume percentage), to produce non-load-bearing lightweight concrete. Waste type 1 consists of paperboard chips mixed with small amount of sand, and waste type 2 consists of paperboard chips mixed with expanded polystyrene and nylon. This study was carried out in laboratory scale to achieve acceptable strength and minimum density by using maximum amount of waste, in accordance with ASTM-C129 for non-load-bearing lightweight concrete construction. Therefore, three types of concrete, including concrete containing waste type 1 (replacing 0, 60, 70 and 80 % of waste and sand), concrete containing waste type 2 (replacing 0, 55, 75 and 95 % of waste and sand) and concrete containing both waste types, were constructed. Different tests on the fresh and hardened concrete, including slump, pH, oven-dry density, compressive and tensile strengths, flexural strength, flexural toughness and water absorption, were carried out. The results indicate that the use of waste type 1 is more reliable than waste type 2 in terms of concrete specifications and standard-conforming viewpoints. Results revealed that use of these wastes in concrete can save the paperboard industry disposal costs and produce 'greener concrete' for construction.

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“…On the other hand, lowest biomass and cellular lipid content were exhibited by this strain when xylose was used as a carbon source ( Rhodotorula mucilaginosa F [35], respectively.…”

Section: Discussionmentioning

confidence: 90%

Single Cell Oil Production with Cutaneotrichosporon curvatus (syn, Cryptococcus curvatus) PY39 and Its Use for Biodiesel Preparation

Jiru¹

2020

Preprint

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Background: Microorganisms including yeasts that are capable of accumulating lipids above 20 to 70% of their dry biomass are collectively named oleaginous. The oil produced from such microorganisms can be used as alternative sources of oils for human consumption, feedstocks for production of biodiesel, components in paints, coatings, detergents, cleaning products, cosmetics, plastics, rubber and intermediate products.Results: In this study Cutaneotrichosporon curvatus (Cryptococcus curvatus) PY39, an oleaginous yeast, isolated from flower surface in Ethiopia, was grown under nitrogen-limited media. The capacity of this strain with respect to biomass production, lipid yield and lipid content was evaluated. To determine the optimal culture conditions for this oleaginous yeast, different carbon and nitrogen sources, carbon to nitrogen (C/N) ratio, pH, incubation temperature, shaking speed and incubation period were investigated. The optimal fermentation conditions were obtained as follows: 70 g/L of glucose as carbon source; combinations of ammonium sulphate and yeast extract as nitrogen sources at, respectively, 0.50 g/L and 0.47 g/L; initial pH of 5.0; temperature at 30oC, shaking speed of 225 rpm, and cultivated for 144 h. Under the optimized conditions, C.curvatus PY39 accumulated lipids up to 7.22±0.26 g/L on dry biomass basis. Such values correspond to lipid content of 48.66±0.60%. This strain was further grown on media containing peel mixtures of papaya and mango. Under the optimized conditions, C. curvatus PY39 exhibited a lipid yield and lipid content of 3.95±0.67 g/L and 35.02±1.63%, respectively. The fatty acid profiles were analyzed using gas chromatography. Data revealed the presence of significant amount of oleic acid (54.40±1.15%), palmitic acid (17.39±0.47%), stearic acid (13.16±0.93%) and low amount of other fatty acids in the extracted yeast oils which indicate that the fatty acid profiles were very similar to that of conventional vegetable oils.Conclusion: The results of fatty acid profiles showed that the microbial lipids from the studied yeast can be good feedstocks for biodiesel production.

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Recycling of lignocellulosic waste materials to produce high-value products: single cell oil and xylitol

Cited by 25 publications

References 48 publications

Yeast derived from lignocellulosic biomass as a sustainable feed resource for use in aquaculture

Yeast derived from lignocellulosic biomass as a sustainable feed resource for use in aquaculture

Effects of recycled paperboard mill wastes on the properties of non-load-bearing concrete

Single Cell Oil Production with Cutaneotrichosporon curvatus (syn, Cryptococcus curvatus) PY39 and Its Use for Biodiesel Preparation

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