title: Mass transfer dynamics of ammonia in high rate biomethanation of poultry litter leachate.
abstract: In the present study possibility of coupling biofilter to arrest ammonia (NH(3)) emission to the atmosphere from the integrated UASB and stripper (UASB+ST) system treating poultry litter leachate was studied. UASB+ST with biofilter (UASB+ST+BF) exhibited removal efficiency (RE) of NH(3) in the range of 98-99% (below 28 ppmV (parts per million by volume)) with low cost agricultural residue as a bedding material. Mass transfer dynamics of TAN in the system revealed that TAN loss to atmosphere was below 1% in UASB+ST+BF where as it was in the range of 70-90% in UASB+ST. Cost estimates revealed that financial implications due to the addition of biofilter were below 10% of total capital cost. TAN retained in the bedding material of biofilter could also be utilized as soil conditioner upon saturation.
authors.affiliation: Bioengineering and Environmental Centre, Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500607, Andhra Pradesh, India. gangagnirao@yahoo.com
authors.forename: A
authors.initials: A
authors.lastname: Gangagni Rao
authors.forename: Bharath
authors.initials: B
authors.lastname: Gandu
authors.forename: Y V
authors.initials: YV
authors.lastname: Swamy
mesh_terms: D000641:Ammonia / Q000032:analysis* / Q000302:isolation & purification; D000818:Animals; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology; D003365:Costs and Cost Analysis; D005374:Filtration / Q000191:economics / Q000295:instrumentation / Q000379:methods*; D008697:Methane / Q000032:analysis*; D011200:Poultry; D012722:Sewage / Q000382:microbiology; D014866:Waste Products / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D012722:Sewage; D014866:Waste Products; D014874:Water Pollutants, Chemical; D000641:Ammonia; D008697:Methane