Mesophilic biomethanation and treatment of poultry waste-water using pilot scale UASB reactor.
The feasibility of applying the up-flow anaerobic sludge blanket (UASB) treatment for poultry waste (faeces) water was examined. A continuous-flow UASB pilot scale reactor of 3.50 L capacity using mixed culture was operated for 95 days to assess the treatability of poultry waste-water and its methane production. The maximum chemical oxygen demand (COD) removed was found to be 78% when organic loading rate (OLR) was 2.9 kg COD m(-3) day(-1) at hydraulic retention times (HRT) of 13.2 hr. The average biogas recovery was 0.26 m3 CH4 kg COD with an average methane content of 57% at mean temperature of 30 degrees C. Data indicate more rapid methanogenesis with higher loading rates and shorter hydraulic retention times. At feed concentration of 4.8 kg COD m(-3) day(-1), anaerobic digestion was severely retarded at all hydraulic retention time tested. This complication in the reactor operations may be linked to build-up of colloidal solids often associated with poultry waste water and ammonia toxicity. Isolates from granular sludge and effluent were found to be facultative anaerobes most of which were Pseudomonas genera.
Atuanya
Ernest I
EI
Department of Microbiology, University of Benin, Benin City, Nigeria. atuei@uniben.edu.ng
Aigbirior
Moses
M
D000693:Anaerobiosis; D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D007220:Industrial Waste; D008372:Manure / Q000382:microbiology*; D008697:Methane / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism; D011200:Poultry; D012037:Refuse Disposal / Q000379:methods*; D014872:Water Movements
D007220:Industrial Waste; D008372:Manure; D008697:Methane; D010100:Oxygen