title: Exploitation of rapid acidification phenomena of food waste in reducing the hydraulic retention time (HRT) of high rate anaerobic digester without conceding on biogas yield.
abstract: The aim of the present work was to study and infer a full scale experience on co-digestion of 1000kg of FW (400kg cooked food waste and 600kg uncooked food waste) and 2000L of rice gruel (RG) on daily basis based on a high rate biomethanation technology called "Anaerobic gas lift reactor" (AGR). The pH of raw substrate was low (5.2-5.5) that resulted in rapid acidification phenomena with in 12h in the feed preparation tank that facilitated to obtain a lower hydraulic residence time (HRT) of 10days. At full load, AGR was fed with 245kg of total solids, 205kg of volatile solids (167kg of organic matter in terms of chemical oxygen demand) which resulted in the generation of biogas and bio manure of 140m3/day and 110kg/day respectively. The produced biogas replaced 60-70kg of LPG per day.
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India.
authors.forename: Kranti
authors.initials: K
authors.lastname: Kuruti
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India.
authors.forename: Sameena
authors.initials: S
authors.lastname: Begum
authors.affiliation: Ahuja Engineering Services Pvt. Ltd, 3017, Emerald House, S.D. Road, Secunderabad 500003, India.
authors.forename: Shruti
authors.initials: S
authors.lastname: Ahuja
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India. Electronic address: agrao@iict.res.in.
authors.forename: Gangagni Rao
authors.initials: GR
authors.lastname: Anupoju
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India.
authors.forename: Sudharshan
authors.initials: S
authors.lastname: Juntupally
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India.
authors.forename: Bharath
authors.initials: B
authors.lastname: Gandu
authors.affiliation: Ahuja Engineering Services Pvt. Ltd, 3017, Emerald House, S.D. Road, Secunderabad 500003, India.
authors.forename: Devender Kumar
authors.initials: DK
authors.lastname: Ahuja
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D003296:Cooking; D005502:Food; D006863:Hydrogen-Ion Concentration; D008372:Manure; D008697:Methane / Q000096:biosynthesis; D018505:Waste Management / Q000295:instrumentation / Q000379:methods*
chemical_list: D056804:Biofuels; D008372:Manure; D008697:Methane
keywords: Acidification; Anaerobic gas lift reactor (AGR); Biogas; Food waste; Rice gruel