title: Cultivation of Nannochloropsis salina in municipal wastewater or digester centrate.
abstract: Meaningful use of biofuels for transportation depends on utilization of water from non-traditional, non-potable resources. Here it is hypothesized that (i) reclaimed wastewater or nutrient-rich side streams derived from municipal wastewater treatment are suitable for that purpose and (ii) use of those waters for algal growth can promote water quality through nutrient management. Experiments showed that metals levels in municipal wastewaters are unlikely to inhibit algal growth and lipid production, at least by metals tolerant microalgae like Nannochloropsis salina. Cells grew without inhibition in treated municipal wastewater or centrate derived from wastewater treatment at additions up to 75 percent v/v in their normal growth medium minus nitrogen and phosphorus. Although wastewater provides a suitable nutrient source for algal growth, not enough municipal wastewater is available to support a meaningful biofuels industry without efficient water recycling and nutrient recovery/reuse from spent algae.
authors.affiliation: Department of Chemical and Environmental Engineering, The University of Arizona, 1133 E. James E. Rogers Way, Harshbarger 108, Tucson, AZ 85721, United States. Electronic address: dong@email.arizona.edu.
authors.forename: Bingfeng
authors.initials: B
authors.lastname: Dong
authors.affiliation: Department of Chemical and Environmental Engineering, The University of Arizona, 1133 E. James E. Rogers Way, Harshbarger 108, Tucson, AZ 85721, United States.
authors.forename: Nam
authors.initials: N
authors.lastname: Ho
authors.affiliation: Department of Chemical and Environmental Engineering, The University of Arizona, 1133 E. James E. Rogers Way, Harshbarger 108, Tucson, AZ 85721, United States.
authors.forename: Kimberly L
authors.initials: KL
authors.lastname: Ogden
authors.affiliation: Department of Chemical and Environmental Engineering, The University of Arizona, 1133 E. James E. Rogers Way, Harshbarger 108, Tucson, AZ 85721, United States.
authors.forename: Robert G
authors.initials: RG
authors.lastname: Arnold
mesh_terms: D056804:Biofuels; D020128:Inhibitory Concentration 50; D008055:Lipids / Q000032:analysis; D008670:Metals / Q000633:toxicity; D058086:Microalgae / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D062065:Wastewater; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity
chemical_list: D056804:Biofuels; D008055:Lipids; D008670:Metals; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical
keywords: Biodiesel; Lipid production; Municipal wastewater; Nannochloropsis salina; Nutrient removal