title: Biomethanation of vegetable market waste in an anaerobic baffled reactor: Effect of effluent recirculation and carbon mass balance analysis.
abstract: In the present study, feasibility of biomethanation of vegetable market waste in a 4-chambered anaerobic baffled reactor (ABR) was investigated at 30d hydraulic retention time and organic loading rate of 0.5gVS/L/d for one year. Indicators of process stability viz., butyrate/acetate and propionate/acetate ratios were consistent with phase separation in the different chambers, which remained unaltered even during recirculation of effluent. Chemical oxygen demand (COD) and volatile solids (VS) removal efficiencies were observed to be consistently high (above 90%). Corresponding biogas and methane yields of 0.7-0.8L/g VS added/d and 0.42-52L/g VS added/d respectively were among the highest reported in case of AD of vegetable waste in an ABR. Process efficiency of the ABR for vegetable waste methanation, which is indicated by carbon recovery factor showed that, nearly 96.7% of the input carbon considered for mass balance was accounted for in the product.
authors.affiliation: Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
authors.forename: Madhuri
authors.initials: M
authors.lastname: Gulhane
authors.affiliation: Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India. Electronic address: aa_khardenavis@neeri.res.in.
authors.forename: Anshuman A
authors.initials: AA
authors.lastname: Khardenavis
authors.affiliation: Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
authors.forename: Sneha
authors.initials: S
authors.lastname: Karia
authors.affiliation: Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
authors.forename: Prabhakar
authors.initials: P
authors.lastname: Pandit
authors.affiliation: Analytical Instrumentation Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
authors.forename: Gajanan S
authors.initials: GS
authors.lastname: Kanade
authors.affiliation: Analytical Instrumentation Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
authors.forename: Satish
authors.initials: S
authors.lastname: Lokhande
authors.affiliation: Solid and Hazardous Waste Management Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
authors.forename: Atul N
authors.initials: AN
authors.lastname: Vaidya
authors.affiliation: Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
authors.forename: Hemant J
authors.initials: HJ
authors.lastname: Purohit
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels / Q000032:analysis*; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002244:Carbon / Q000032:analysis; D005232:Fatty Acids, Volatile / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000032:analysis* / Q000096:biosynthesis; D014675:Vegetables / Q000737:chemistry; D014866:Waste Products
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D014866:Waste Products; D002244:Carbon; D008697:Methane
keywords: Anaerobic baffled reactor; Biomethanation; Carbon mass balance; Effluent recirculation; Vegetable market waste