title: An integrated microalgal growth model and its application to optimize the biomass production of Scenedesmus sp. LX1 in open pond under the nutrient level of domestic secondary effluent.
abstract: Microalgal growth is the key to the coupled system of wastewater treatment and microalgal biomass production. In this study, Monod model, Droop model and Steele model were incorporated to obtain an integrated growth model describing the combined effects of nitrogen, phosphorus and light intensity on the growth rate of Scenedesmus sp. LX1. The model parameters were obtained via fitting experimental data to these classical models. Furthermore, the biomass production of Scenedesmus sp. LX1 in open pond under nutrient level of secondary effluent was analyzed based on the integrated model, predicting a maximal microalgal biomass production rate about 20 g m(-2) d(-1). In order to optimize the biomass production of open pond the microalgal biomass concentration, light intensity on the surface of open pond, total depth of culture medium and hydraulic retention time should be 500 g m(-3), 16,000 lx, 0.2 m and 5.2 d in the conditions of this study, respectively.
authors.affiliation: Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, PR China.
authors.forename: Yin-Hu
authors.initials: YH
authors.lastname: Wu
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Yin
authors.initials: Y
authors.lastname: Yu
authors.forename: Hong-Ying
authors.initials: HY
authors.lastname: Hu
authors.forename: Tian-Yuan
authors.initials: TY
authors.lastname: Zhang
authors.forename: Feng-Min
authors.initials: FM
authors.lastname: Li
mesh_terms: D018533:Biomass; D005191:Family Characteristics; D008027:Light; D058086:Microalgae / Q000187:drug effects / Q000254:growth & development* / Q000528:radiation effects; D008962:Models, Theoretical; D009584:Nitrogen / Q000494:pharmacology*; D010758:Phosphorus / Q000494:pharmacology*; D061005:Ponds / Q000382:microbiology*; D044444:Scenedesmus / Q000187:drug effects / Q000254:growth & development* / Q000528:radiation effects; D062065:Wastewater / Q000737:chemistry*
chemical_list: D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater
keywords: Biomass production; Growth model; Microalgae; Scenedesmus sp. LX1