Recycling of food waste as nutrients in Chlorella vulgaris cultivation

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Heterotrophic cultivation of Chlorella vulgaris was investigated in food waste hydrolysate. The highest exponential growth rate in terms of biomass of 0.8 day−1 was obtained in a hydrolysate consisting of 17.9 g L−1 glucose, 0.1 g L−1 free amino nitrogen, 0.3 g L−1 phosphate and 4.8 mg L−1 nitrate, while the growth rate was reduced in higher concentrated hydrolysates. C. vulgaris utilized the nutrients recovered from food waste for the formation of biomass and 0.9 g biomass was produced per gram glucose consumed. The microalgal biomass produced in nutrient sufficient batch cultures consisted of around 400 mg g−1 carbohydrates, 200 mg g−1 proteins and 200 mg g−1 lipids. The conversion of nutrients derived from food waste and the balanced biomass composition make C. vulgaris a promising strain for the recycling of food waste in food, feed and fuel productions.
Original languageEnglish
JournalBioresource Technology
Pages (from-to)144-151
Number of pages8
Publication statusPublished - 10.2014

    Research areas

  • Lipids, Fatty acids, Waste utilization, Nutrient recovery, Food waste hydrolysate
  • Biology