Bioreactor cultivation of the planktonic copepod Acartia   steueri Smirnov for egg collection

2021 ◽  
Author(s):  
Yoshiki Takayama ◽  
Minamo Hirahara ◽  
Tatsuki Toda
Keyword(s):  
Bioreactor Cultivation ◽  
Planktonic Copepod ◽  
Acartia Steueri

Lake acidification and the distribution of males and females of a planktonic copepod

2002 ◽  
Vol 28 (2) ◽  
pp. 992-995
Author(s):  
Jan-Erik Svensson ◽  
Ragnar Lagergren ◽  
Jan A. E. Stenson
Keyword(s):  
Lake Acidification ◽  
Planktonic Copepod ◽  
Males And Females

scholarly journals Production of Enriched Sporidiobolus sp. Yeast Biomass Cultivated on Mixed Coffee Hydrolyzate and Fat/Oil Waste Materials

2021 ◽  
Vol 9 (9) ◽  
pp. 1848
Author(s):  
Martin Szotkowski ◽  
Jiří Holub ◽  
Samuel Šimanský ◽  
Klára Hubačová ◽  
Dagmar Hladká ◽  
...  
Keyword(s):  
Food Industry ◽  
Hydrothermal Carbonization ◽  
Bioreactor Cultivation ◽  
Yeast Biomass ◽  
Yeast Strains ◽  
Coffee Grounds ◽  
Sporidiobolus Pararoseus ◽  
Circular Economics ◽  
Coffee Oil ◽  
Waste Fat

One of the most addressed topics today is the transfer from a linear model of economics to a model of circular economics. It is a discipline that seeks to eliminate waste produced by various industries. The food industry generates huge amounts of waste worldwide, particularly the coffee industry, and related industries produce millions of tons of waste a year. These wastes have potential utility in biotechnology, and in the production of energy, fuels, fertilizers and nutrients, using green techniques such as anaerobic digestion, co-digestion, composting, enzymatic action, and ultrasonic and hydrothermal carbonization. This work is focused on the biotechnological use of processed spent coffee grounds (SCG) and waste fat/oil materials by some Sporidiobolus sp. carotenogenic yeasts in the model of circular economics. The results show that selected yeast strains are able to grow on SCG hydrolysate and are resistant to antimicrobial compounds present in media. The most productive strain Sporidiobolus pararoseus CCY19-9-6 was chosen for bioreactor cultivation in media with a mixture of coffee lignocellulose fraction and some fat wastes. Sporidiobolus pararoseus CCY19-9-6 was able to produce more than 22 g/L of biomass in mixture of SCG hydrolysate and both coffee oil and frying oil. The combined waste substrates induced the production of lipidic metabolites, whereby the production of carotenoids exceeded 5 mg/g of dry biomass. On media with coffee oil, this strain produced high amounts of ubiquinone (8.265 ± 1.648 mg/g) and ergosterol (13.485 ± 1.275 mg/g). Overall, the results prove that a combination of waste substrates is a promising option for the production of carotenoid- and lipid-enriched yeast biomass.

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