title: Statistical optimization of thermal pretreatment conditions for enhanced biomethane production from defatted algal biomass.
abstract: The present study analyzes the effect of thermal pretreatment for enhancing the biomethane potential of defatted algal biomass of Scenedesmus dimorphus through statistically guided experimental design. To this end, defatted microalgal biomass at various concentrations (1, 3 and 5 g L(-1)) was pretreated at elevated temperatures (100, 120 and 150°C) for 20, 40 and 60 min. The solubilised TOC was favourably enhanced up to 71 mg L(-1) after pretreatment at a temperature of 150°C for reaction time of 60 min. The methane yield was substantially enhanced (up to 60%) and could be correlated with an increase in organic matter solubilisation and enhanced biodegradability via thermal pretreatment. The optimisation of the integrated thermal pretreatment-biomethanation process resulted in up to 1.6-fold increase in methane yield.
authors.affiliation: Environmental Biotechnology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India; Centre for Environmental Science and Engineering, Indian Institute of Technology, Mumbai, Maharashtra, India; Plant Cell Biotechnology Department, CSIR-Central Food Technological Research Institute, Mysore, Karnataka, India.
authors.forename: T Sarat
authors.initials: TS
authors.lastname: Chandra
authors.affiliation: Environmental Biotechnology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India.
authors.forename: G
authors.initials: G
authors.lastname: Suvidha
authors.affiliation: Centre for Environmental Science and Engineering, Indian Institute of Technology, Mumbai, Maharashtra, India.
authors.forename: S
authors.initials: S
authors.lastname: Mukherji
authors.affiliation: Plant Cell Biotechnology Department, CSIR-Central Food Technological Research Institute, Mysore, Karnataka, India.
authors.forename: V S
authors.initials: VS
authors.lastname: Chauhan
authors.affiliation: Plant Cell Biotechnology Department, CSIR-Central Food Technological Research Institute, Mysore, Karnataka, India.
authors.forename: S
authors.initials: S
authors.lastname: Vidyashankar
authors.affiliation: Environmental Biotechnology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India.
authors.forename: K
authors.initials: K
authors.lastname: Krishnamurthi
authors.affiliation: Plant Cell Biotechnology Department, CSIR-Central Food Technological Research Institute, Mysore, Karnataka, India.
authors.forename: R
authors.initials: R
authors.lastname: Sarada
authors.affiliation: Plant Cell Biotechnology Department, CSIR-Central Food Technological Research Institute, Mysore, Karnataka, India. Electronic address: sandeepm@cftri.res.in.
authors.forename: S N
authors.initials: SN
authors.lastname: Mudliar
mesh_terms: D000704:Analysis of Variance; D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000032:analysis; D008055:Lipids / Q000302:isolation & purification; D008697:Methane / Q000096:biosynthesis*; D058086:Microalgae / Q000378:metabolism*; D009930:Organic Chemicals / Q000032:analysis; D012044:Regression Analysis; D044444:Scenedesmus; D012995:Solubility; D013223:Statistics as Topic; D013696:Temperature
chemical_list: D056804:Biofuels; D008055:Lipids; D009930:Organic Chemicals; D002244:Carbon; D008697:Methane
keywords: Defatted algal biomass; Methane yield; Scenedesmus dimorphus; Thermal pretreatment