title: Food waste as nutrient source in heterotrophic microalgae cultivation.
abstract: Glucose, free amino nitrogen (FAN), and phosphate were recovered from food waste by fungal hydrolysis using Aspergillus awamori and Aspergillus oryzae. Using 100g food waste (dry weight), 31.9 g glucose, 0.28 g FAN, and 0.38 g phosphate were recovered after 24h of hydrolysis. The pure hydrolysate has then been used as culture medium and nutrient source for the two heterotrophic microalgae Schizochytrium mangrovei and Chlorella pyrenoidosa, S. mangrovei and C. pyrenoidosa grew well on the complex food waste hydrolysate by utilizing the nutrients recovered. At the end of fermentation 10-20 g biomass were produced rich in carbohydrates, lipids, proteins, and saturated and polyunsaturated fatty acids. Results of this study revealed the potential of food waste hydrolysate as culture medium and nutrient source in microalgae cultivation.
authors.affiliation: School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong.
authors.forename: Daniel
authors.initials: D
authors.lastname: Pleissner
authors.forename: Wan Chi
authors.initials: WC
authors.lastname: Lam
authors.forename: Zheng
authors.initials: Z
authors.lastname: Sun
authors.forename: Carol Sze Ki
authors.initials: CS
authors.lastname: Lin
mesh_terms: D056804:Biofuels; D018533:Biomass; D018929:Cell Culture Techniques; D002708:Chlorella / Q000254:growth & development / Q000378:metabolism*; D005502:Food; D006868:Hydrolysis; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism*; D059027:Recycling / Q000379:methods*; D058009:Stramenopiles / Q000254:growth & development / Q000378:metabolism*; D014866:Waste Products
chemical_list: D056804:Biofuels; D014866:Waste Products