title: Integration of algae cultivation as biodiesel production feedstock with municipal wastewater treatment: strains screening and significance evaluation of environmental factors.
abstract: The objectives of this study are to find the robust strains for the centrate cultivation system and to evaluate the effect of environmental factors including light intensity, light-dark cycle, and exogenous CO2 concentration on biomass accumulation, wastewater nutrient removal and biodiesel production. The results showed that all 14 algae strains from the genus of Chlorella, Haematococcus, Scenedesmus, Chlamydomonas, and Chloroccum were able to grow on centrate. The highest net biomass accumulation (2.01 g/L) was observed with Chlorella kessleri followed by Chlorella protothecoides (1.31 g/L), and both of them were proved to be capable of mixotrophic growth when cultivated on centrate. Environmental factors had significant effect on algal biomass accumulation, wastewater nutrients removal and biodiesel production. Higher light intensity and exogenous CO2 concentration with longer lighting period promote biomass accumulation, biodiesel production, as well as the removal of chemical oxygen demand and nitrogen, while, lower exogenous CO2 concentration promotes phosphorus removal.
authors: Department of Bioproducts and Biosystems Engineering, University of Minnesota-Twin Cities, 1390 Eckles Avenue, Saint Paul, MN 55108, USA.
authors: Yecong
authors: Y
authors: Li
authors: Wenguang
authors: W
authors: Zhou
authors: Bing
authors: B
authors: Hu
authors: Min
authors: M
authors: Min
authors: Paul
authors: P
authors: Chen
authors: Roger R
authors: RR
authors: Ruan
mesh_terms: D000821:Animal Feed; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D001709:Biotechnology / Q000379:methods; D002245:Carbon Dioxide / Q000737:chemistry; D002696:Chlamydomonas / Q000502:physiology*; D002708:Chlorella / Q000502:physiology*; D004952:Esters / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D010758:Phosphorus / Q000737:chemistry; D044444:Scenedesmus / Q000502:physiology*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D056804:Biofuels; D004952:Esters; D005227:Fatty Acids; D002245:Carbon Dioxide; D010758:Phosphorus