title: High rate biomethanation technology for solid waste management and rapid biogas production: An emphasis on reactor design parameters.
abstract: A high rate biomethanation digester was designed and fabricated to study its real field treatment efficiency and simultaneous biogas generation. The major design parameters like self mixing, delinking hydraulic retention time and solid retention time etc. were considered for efficient performance. It was operated with an organic loading rate (OLR) of 1.5kg/m(3)d(-1) with composite food waste for about one year. The maximum treatment efficiency achieved with respect to total solid (TS) reduction and volatile solids (VS) reduction was 94.5% and 89.7%, respectively. Annual mean biogas of about 0.16m(3)/kgVSd(-1) was observed with methane content varying from 56% to 60% (v/v). The high competence of high rate digester is attributed to its specific design features and intermittent mixing of the digester contents and also due to the hydrodynamic principles involved in its operation.
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
authors.forename: Shikha
authors.initials: S
authors.lastname: Dahiya
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India. Electronic address: johnyiict@yahoo.co.in.
authors.forename: Johny
authors.initials: J
authors.lastname: Joseph
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods; D002417:Cattle; D004867:Equipment Design; D005232:Fatty Acids, Volatile / Q000737:chemistry; D005502:Food; D005638:Fruit; D005740:Gases; D006863:Hydrogen-Ion Concentration; D008372:Manure; D008697:Methane / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D062611:Solid Waste; D014675:Vegetables
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D005740:Gases; D008372:Manure; D009930:Organic Chemicals; D062611:Solid Waste; D008697:Methane
keywords: High rate biomethanation; Methane; Organic load; Treatment efficiency; pH