title: Anaerobic digestion of mixed microalgae cultivated in secondary effluent under mesophilic and thermophilic conditions.
abstract: The anaerobic digestion of mixed indigenous microalgae, grown in a secondary effluent, was evaluated in batch tests at mesophilic (35°C) and thermophilic (50°C) conditions. Under mesophilic conditions, specific methane production varied from 178 to 207 mL CH4/g volatile solids (VS) and the maximum production rate varied from 8.8 to 26.1 mL CH4/(gVS day), depending on the type of microalgae culture. Lower methane parameters were observed in those cultures where Scenedesmus represents more than 95% of the microalge. The culture with the lowest digestion performances under mesophilic conditions was studied under thermophilic conditions. The increase in the incubation temperature significantly increased the specific methane production (390 mL CH4/g VS) and rate (26.0 mL CH4/(gVS day)). However, under thermophilic conditions a lag period of 30 days was observed.
authors.affiliation: Laboratory for Research on Advanced Processes for Water Treatment, Academic Unit Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, 76230 Querétaro, México E-mail: GBuitronM@ii.unam.mx.
authors.forename: Glenda
authors.initials: G
authors.lastname: Cea-Barcia
authors.affiliation: Laboratory for Research on Advanced Processes for Water Treatment, Academic Unit Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, 76230 Querétaro, México E-mail: GBuitronM@ii.unam.mx.
authors.forename: Gloria
authors.initials: G
authors.lastname: Moreno
authors.affiliation: Laboratory for Research on Advanced Processes for Water Treatment, Academic Unit Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, 76230 Querétaro, México E-mail: GBuitronM@ii.unam.mx.
authors.forename: Germán
authors.initials: G
authors.lastname: Buitrón
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors / Q000382:microbiology*; D006358:Hot Temperature; D008697:Methane / Q000378:metabolism*; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism*; D044444:Scenedesmus / Q000254:growth & development / Q000378:metabolism*; D062065:Wastewater
chemical_list: D056804:Biofuels; D008697:Methane; D062065:Wastewater