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Treatability and Biogas Production Potential of Slaughterhouse Wastewater Using Anaerobic Digester Combined With Constructed Wetland at City Abattoir, Addis Ababa

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dc.contributor.advisor Leta, Seyoum (Professer)
dc.contributor.author Worku, Zemene
dc.date.accessioned 2019-07-29T11:33:41Z
dc.date.available 2019-07-29T11:33:41Z
dc.date.issued 2018-05-05
dc.identifier.uri http://etd.aau.edu.et/handle/123456789/18686
dc.description.abstract The objective of this study was to evaluate the biogas production and treatability of slaughterhouse wastewater using an integrated treatment system of anaerobic digester and constructed wetland at pilot scale level and assess the suitability of the treated wastewater for vegetable irrigation. The performance of the pilot scale treatment system was evaluated at the OLRs of 0.32, 0.51, 1.16 and 2.31 kgCOD m−3day−1 with corresponding anaerobic digester HRTs of 22, 14, 6 and 3 days respectively, under mesophilic environmental condition (29.6±1.40 °C). The COD removal efficiency and methane yield of the pilot scale anaerobic digester were in the range from 43.39% to 84.54% and 0.09±0.03 to 0.22±0.02 m3/kg CODr, respectively, with the maximum volumetric methane production (0.93±0.17m3/day) was achieved at the OLR of 1.16 kg m−3 d−1 resulting an optimum methane yield of 0.20m3 CH4 per kg CODr. The average removal efficiencies of the pilot scale integrated treatment system for TN, NH4+-N and NO-3-N were in the range between 75.25-93.79%, 85.85-95.62% and 90.21-94.59% with mean influent values of 565.16±54.91 mg/l, 241.55±39.57 mg/l, 156.28±17.16 mg/l, respectively, depending on the different OLRs (study phases) to the system. The mean percentage removal efficiency of TP ranged from 78.22 to 85.242 with average influent value varied from 151.46±16.45 mg/l to 157.60±13.41 mg/l. The mean system influent values of SO42- was 573.83±58.10 mg/L and its removal efficiency was between 82.34% and 70.46%. The removal efficiency of the integrated treatment system for total coliform (TC) and fecal coliform (FC) were in the range of 69.75-98.05% and 77.00-99.99%, respectively. The irrigation suitability test study of the wastewater revealed that the effluent wastewater treated Swiss chard vegetable performed significantly better than the control (p<0.05) and comparable with that of the commercial inorganic fertilizer treated ones. en_US
dc.language.iso en en_US
dc.publisher Addis Ababa University en_US
dc.subject Anaerobic Digester en_US
dc.subject Biogas en_US
dc.subject Constructed Wetland en_US
dc.subject Effluent en_US
dc.subject Integrated Treatment System Performance en_US
dc.subject Slaughterhouse Wastewater en_US
dc.subject Effluent Reuse en_US
dc.title Treatability and Biogas Production Potential of Slaughterhouse Wastewater Using Anaerobic Digester Combined With Constructed Wetland at City Abattoir, Addis Ababa en_US
dc.type Thesis en_US


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