title: Enhanced biogas production from rice straw by selective micronutrients under solid state anaerobic digestion.
abstract: Biomethanation of rice straw (RS) was studied in a batch mode at high total solid content (TSC) of 25% in outdoor pilot scale digesters. Performance was monitored for over six months by supplementing Nickel and Cobalt 15 and 10mgkg(-1) RS to each of mesophilic and thermophilic digesters for 35 and 21days retention time (RT), respectively. The average biogas production from mesophilic and thermophilic digesters were found varying 310 and 396Lkg(-1)TS, respectively. The corresponding figures for the control digesters were 225 and 270Lkg(-1)TS. Around 37 and 46% higher biogas production was recorded by supplementing the micronutrients in mesophilic and thermophilic digesters, respectively. Methane content in biogas was 57-59%. Matured compost had nitrogen, phosphorus and potassium contents of 1.0-1.2, 1.3-2.2, and 1.2-2.1%, respectively. The results demonstrated that the present process is faster, requires less than 85% water and produces green energy in addition to manure in less time compared to conventional process.
authors.affiliation: Sardar Patel Renewable Energy Research Institute, P. Box No. 2, Vallabh Vidyanagar 388 120, Gujarat, India. Electronic address: madhuri68@gmail.com.
authors.forename: Madhuri
authors.initials: M
authors.lastname: Narra
authors.affiliation: Sardar Patel Renewable Energy Research Institute, P. Box No. 2, Vallabh Vidyanagar 388 120, Gujarat, India.
authors.forename: Velmurugan
authors.initials: V
authors.lastname: Balasubramanian
authors.affiliation: Sardar Patel Renewable Energy Research Institute, P. Box No. 2, Vallabh Vidyanagar 388 120, Gujarat, India.
authors.forename: Anil
authors.initials: A
authors.lastname: Kurchania
authors.affiliation: Energy Consultant, KC-5, Ghaziabad, Uttar Pradesh, India.
authors.forename: Bhim Sen
authors.initials: BS
authors.lastname: Pathak
authors.affiliation: Sardar Patel Renewable Energy Research Institute, P. Box No. 2, Vallabh Vidyanagar 388 120, Gujarat, India.
authors.forename: Murari
authors.initials: M
authors.lastname: Shyam
mesh_terms: D000693:Anaerobiosis / Q000187:drug effects; D001673:Biodegradation, Environmental / Q000187:drug effects; D056804:Biofuels; D019149:Bioreactors / Q000382:microbiology; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000032:analysis; D008697:Methane / Q000096:biosynthesis; D018977:Micronutrients / Q000494:pharmacology*; D009584:Nitrogen / Q000032:analysis; D012275:Oryza / Q000737:chemistry*; D012987:Soil; D013696:Temperature; D014866:Waste Products
chemical_list: D056804:Biofuels; D018977:Micronutrients; D012987:Soil; D014866:Waste Products; D002244:Carbon; D009584:Nitrogen; D008697:Methane
keywords: Biomethanation; Compost; High solid loading; Micronutrient; Rice straw