A Comparative Study of Biogas Production from Cattle Slaughterhouse Wastewater Using Conventional and Modified Upflow Anaerobic Sludge Blanket (UASB) Reactors

Mohammed Ali Musa, Syazwani Idrus, Mohd Razif Harun, Tuan Farhana Tuan Mohd Marzuki and Abdul Malek Abdul Wahab
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Mohammed Ali Musa: Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang 43400, Malaysia
Syazwani Idrus: Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang 43400, Malaysia
Mohd Razif Harun: Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia
Tuan Farhana Tuan Mohd Marzuki: Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang 43400, Malaysia
Abdul Malek Abdul Wahab: Faculty of Mechanical Engineering, Universiti Teknologi Mara, Shah Alam 40450, Malaysia

IJERPH, 2019, vol. 17, issue 1, 1-19

Abstract: Cattle slaughterhouses generate wastewater that is rich in organic contaminant and nutrients, which is considered as high strength wastewater with a high potential for energy recovery. Work was undertaken to evaluate the efficiency of the 12 L laboratory scale conventional and a modified upflow anaerobic sludge blanket (UASB) reactors (conventional, R1 and modified, R2), for treatment of cattle slaughterhouse wastewater (CSWW) under mesophilic condition (35 ± 1 °C). Both reactors were acclimated with synthetic wastewater for 30 days, then continuous study with real CSWW proceeds. The reactors were subjected to the same loading condition of OLR, starting from 1.75, 3, 5 10, 14, and 16 g L −1 d −1 , corresponding to 3.5, 6, 10, 20, 28, and 32 g COD/L at constant hydraulic retention time (HRT) of 24 h. The performance of the R1 reactor drastically dropped at OLR 10 g L −1 d −1 , and this significantly affected the subsequent stages. The steady-state performance of the R2 reactor under the same loading condition as the R1 reactor revealed a high COD removal efficiency of 94% and biogas and methane productions were 27 L/d and 89%. The SMP was 0.21 LCH 4 /gCOD added, whereas the NH 3 -N alkalinity ratio stood at 651 mg/L and 0.2. SEM showed that the R2 reactor was dominated by Methanosarcina bacterial species, while the R1 reactor revealed a disturb sludge with insufficient microbial biomass.

Keywords: anaerobic digestion; cattle slaughterhouse wastewater; UASB reactors; COD; HRT; OLR (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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