title: Recycling of food waste as nutrients in Chlorella vulgaris cultivation.
abstract: Heterotrophic cultivation of Chlorella vulgaris was investigated in food waste hydrolysate. The highest exponential growth rate in terms of biomass of 0.8day(-1) was obtained in a hydrolysate consisting of 17.9gL(-1) glucose, 0.1gL(-1) free amino nitrogen, 0.3gL(-1) phosphate and 4.8mgL(-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 0.9g biomass was produced per gram glucose consumed. The microalgal biomass produced in nutrient sufficient batch cultures consisted of around 400mgg(-1) carbohydrates, 200mgg(-1) proteins and 200mgg(-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.
authors.affiliation: School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
authors.forename: Kin Yan
authors.initials: KY
authors.lastname: Lau
authors.affiliation: School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
authors.forename: Daniel
authors.initials: D
authors.lastname: Pleissner
authors.affiliation: School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong. Electronic address: carollin@cityu.edu.hk.
authors.forename: Carol Sze Ki
authors.initials: CSK
authors.lastname: Lin
mesh_terms: D018533:Biomass; D002241:Carbohydrates / Q000032:analysis; D048408:Chlorella vulgaris / Q000254:growth & development* / Q000378:metabolism; D003470:Culture Media / Q000737:chemistry*; D005502:Food; D005947:Glucose / Q000378:metabolism; D008055:Lipids / Q000032:analysis; D009753:Nutritive Value / Q000502:physiology; D011492:Protein Hydrolysates / Q000032:analysis; D059027:Recycling / Q000379:methods*; D014866:Waste Products
chemical_list: D002241:Carbohydrates; D003470:Culture Media; D008055:Lipids; D011492:Protein Hydrolysates; D014866:Waste Products; D005947:Glucose
keywords: Fatty acids; Food waste hydrolysate; Lipids; Nutrient recovery; Waste utilization