Potential of biogas and methane production from anaerobic digestion of poultry slaughterhouse effluent

Abstract

The objective of this study was to evaluate the efficiency of anaerobic digestion on the treatment of effluent from poultry slaughterhouse. The experiment was conducted at the Laboratory of Waste Recycling from Animal Production/FCA/UFGD. During four weeks, eight experimental digesters, semi-continuous models, were loaded and set according to the hydraulic retention time (HRT) of 7, 14, 21 and 28 days, and according to the solid fraction treatment, separated with 1 mm sieve or without separation. The average weekly production of biogas and methane as well as the methane concentrations, the potential production per amount of chemical oxygen demand (COD) added and reduced, the concentrations of N, P and K at the beginning and end of process, and the most likely numbers of total and thermotolerant coliforms were evaluated. For data analysis, a completely randomized design was performed in a 4 × 2 factorial arrangement (4 HRT: 7, 14, 21 and 28 days and separation with 1 mm sieve or without separation), with repetition over time. The highest production of biogas and methane was statistically significant for the HRT of 7 and 14 days (5.29 and 2.38 L of biogas and 4.28 and 1.73 L of methane, respectively). There was an interaction between HRT and the separation of the solid with sieve and the highest production was obtained in the treatment without separation. Similar behavior was observed for the potential production with a maximum of 0.41 m³ methane.kg-1 COD added with an HRT of 7 days without separation of the solid fraction. The separation of the solid fraction is not recommended in the pretreatment of liquid effluent from poultry slaughterhouse, once the potential for production and production of methane and biogas were reduced with this treatment

Kinetics of Organic Biodegradation and Biogas Production in the Pilot-Scale Moving Bed Biofilm Reactor (MBBR) for Piggery Wastewater Treatment

“…The biogas production yield was found to be lower than the reported data of previous studies [ 31 , 32 ]. This was probably due to the difference of the influent substrate.…”

Development of a Modified Plug-Flow Anaerobic Digester for Biogas Production from Animal Manures

“…Because of operational problems regarding biogas measurements, biogas production was estimated using the COD balance. This methodology has been widely used in many publications and textbooks [48][49][50], and we validated the use of COD balance in the present work by comparing the MY values obtained during period P1 from both methods, by flowmeter and by COD balance, as in this period the flowmeter ran correctly. MY averages values are shown in Figure 3, and how a good correlation between them during this period P1 (0.15 ± 0.02, 0.16 ± 0.02, 0.24 ± 0.05, 0.29 ± 0.03 m 3 CH 4 kgVS −1 in reactors R1, R2, R3, and R4, respectively) can be observed.…”

Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach

“…Based on the result, a specific cumulative methane of 139.3 NmlCH 4 /g-COD with up to 68% methane in the biogas (49% on average) was obtained at STP ( Figure 3 ). The methane yield in this BMP test was significantly lower when compared to other organic substrate sources and the obvious theoretical yield [ 14 , 19 , 21 ]. As many other studies argue, including Janke and colleagues, the lower yield could be related to the complex nature of the substrate as well as the additional effect contributed by the ethanol process technology [ 22 ].…”