Energy generation from anaerobic co-digestion of food waste, cow dung and piggery dung

Oladejo, Oladipupo Seun; Dahunsi, S. O.; Adesulu-Dahunsi, A.T.; Ojo, Samuel O.; Lawal, Adedoyin Isola; Idowu, E. O.; Olanipekun, Adewoye A.; Ibikunle, R.A.; Osueke, C.O.; Ajayi, O. E.; Osueke, Ngozi O.; Evbuomwan, Ikponmwosa Owen

doi:10.1016/j.biortech.2020.123694

Cited by 57 publications

(22 citation statements)

References 51 publications

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“…If we roll with these assumptions then, it is imperative that we account for all versions of these viewpoints. However, the study seeks to examine PW version of WP owing to the fact that it sees government spending as endogenously derived rather than exogenously specified in Keynesian growth proposition (Antonis, Constantinos & Persefoni, 2016;Li et al, 2020;Oladejo et al, 2020;Manyeki & Kotosz, 2016;Lawal et al, 2020;Lawal, Inegbedion & Ojeka, 2020;Abdur et al, 2012;Inegbedion et al, 2019). Moreso, the monolithic nature of Nigeria economy and strong believe that government spending is sin-quan-non to economic growth and development cannot be ignored.…”

Section: Introductionmentioning

confidence: 99%

Wagner proposition in Nigeria: An econometric analysis

Babajide

Okunlola

Nwuba

et al. 2020

Heliyon

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Succinct exploration of Adolph Wagner's Proposition [WP] 1883-Peacock and Wiseman 1961version was put to the validation test in the study. At least, this time, for a quinaquina octo annis period, representing the life span of Nigeria. Specific suspicion of shocks from data from the world indicator and monetary authority necessitated the adoption of the ADF test with structural breaks, which came out positive at alternating integrating order. This propelled the Autoregressive Distributed Lag ARDL model path having specified the lag selection automatically. Even though the series showed significant association in the short run, and bi-directional causality, the result of the Bound test-F-statistics (calculated) ¼ 3.42 falls below upper Bound I(0) ¼ 4.68 and lower bound I(1) ¼ 5.15 hence, invalidates the WP position in the longrun in Nigeria. This is an indication that a reduction in noneconomically viable and overlapping, funds-straining ministries/departments/agencies (MDA) is indispensable.

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Section: Introductionmentioning

confidence: 99%

Wagner proposition in Nigeria: An econometric analysis

Babajide

Okunlola

Nwuba

et al. 2020

Heliyon

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“…A high methane content (64.6%) was achieved in the co-digestion of FW and piggery dung of TS = 21.81% [24]. Table 2 summarizes the effect of the parameters in the AD process.…”

Section: Total Solids Content (Ts %)mentioning

confidence: 99%

“…Moreover, Zhang et al reported that methane productivity was enhanced by 41.1% and reached a maximal value of 3725 mL compared to the mono-digestion 2624 mL; thereby an optimal C/N ratio (15.8) and neutral pH were obtained, concentrations of essential trace elements were improved, which had a significant effect in encouraging the methanogens' activities, and the process worked at a high OLR value [22]. Oladipupo et al indicated a diminution of 57% in chemical oxygen demand (COD, which is the amount of oxygen required to oxidize an organic compound to CO 2 , ammonia, and water) in a co-digestion of FW and piggery dung (PD); and a maximal value of biogas, a high mass equilibrium (0.38), and the most consumed rate of volatile solid (VS) (48%) were achieved with a high methane percentage (63%) in a co-digestion of FW, PD, and cow dung compared to the mono-digestion of FW [24]. Further, a proper co-digestion of 20% (OLR) of garden waste and FW conserved the pH at a neutral value, and the VFA concentrations were in the optimum range.…”

Section: Effect Of Co-digestion In the Ad Systemmentioning

confidence: 99%

Recovery of Household Waste by Generation of Biogas as Energy and Compost as Bio-Fertilizer—A Review

et al. 2021

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Nowadays, organic waste and especially household waste represents a significant global issue due to population growth. The anaerobic digestion (AD) process is an essential operation contributing powerfully to the valorization of organic waste including food waste in terms of renewable energy generation (biogas) and the rich-nutrient residue that can be utilized as bio-fertilizer. Thus, this process (AD) allows for good recovery of household waste by generating biogas and compost. However, the AD operation has been affected by several key factors. In this paper, we aim to involve different critical parameters influencing the AD process, including temperature, pH, organic loading rate (OLR), carbon to nitrogen ratio (C/N), and total solid content (TS(%)). Further, the paper highlights the inhibition caused by the excessive accumulation of volatile fatty acids (VFAs) and ammoniac, which exhibits the positive effects of co-digestion, pretreatment methods, and mixing techniques for maintaining process stability and enhancing biogas production. We analyze some current mathematical models explored in the literature, such as distinct generic, non-structural, combined, and kinetic first-order models. Finally, the study discusses challenges, provides some possible solutions, and a future perspective that promises to be a highly useful resource for researchers working in the field of household waste recovery for the generation of biogas.

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“…According to Dima et al (2020), the bioresidues conversion indicates that anaerobic digestion (AD) technology is an interesting route to environmental pollution minimization. It's important to highlight the main advantages, since it is a process eco-friendly, cheaper, and affordable allowing a wide range of uses, such as: the combined production of heat and power, injection into the natural grid or as a fuel in combustion engines (Luz et al, 2017;Rodrìguez-Abalde et al, 2017;Oladejo et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Energetic Valorization of Cereal and Exhausted Coffee Wastes Through Anaerobic Co-digestion With Pig Slurry

Sousa

Duarte

Mesquita

et al. 2021

Front. Sustain. Food Syst.

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In the past years, there has been steady growth in work relating to improve resource efficiency through waste minimization and bioenergy recovery to mitigate climate change. Agro-food industries produce large amounts of bio-waste, challenging innovative energetic valorization strategies in the framework of circular economy principles. Anaerobic digestion (AD) technology is an interesting route to stabilize organic matter and produce biogas as a renewable energy source. This study involves continuous co-digestion of pig slurry (PS), cereal and exhausted coffee wastes (CECW) performed in a continuously stirred tank reactor, with a hydraulic retention time (HRT) of 16 days under at mesophilic conditions (36.9 ± 0.3°C). The experimental trials, were designed to include different cereal and exhausted coffee liquor (CECL) shares in the feeding mixture, corresponding to different PS to CECL ratios (PS:CECL), respectively: 100:0 (T0), 90:10 (T1), 80:20 (T2), and 70:30 (T3), in terms of percentage of inlet feeding rate (v:v). The results obtained for the feeding rate (70:30) yield to the highest specific methane production (SMP = 341 ml.gVS−1) led to a 3.5-fold improvement in comparison with the reference scenario. The synergetic effect between the microbial consortia of PS and the high carbon to nitrogen ratio (C/N) of CECL explain the improvements achieved. The maximum soluble chemical oxygen demand (SCOD) reduction (84.0%) due to the high content and soluble chemical oxygen demand to total chemical oxygen demand ratio (SCOD/TCOD) corroborate the results achieved. The digester stability, evaluated by specific energetic loading rate, was below the limit (0.4 d−1). Results from ANOVA showed a significant effect of CECL on the resulting GPR and SMP values. Additionally, Tukey's “Honest Significant Difference” method, confirmed statistically significant differences between the trials T3-T0, T3-T1, T3-T2, and T2-T0. Thus, co-digestion of PS and of CECL seems to be a promising approach for bioenergy recovery and promoting biowastes circularity.

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Energy generation from anaerobic co-digestion of food waste, cow dung and piggery dung

Cited by 57 publications

References 51 publications

Wagner proposition in Nigeria: An econometric analysis

Wagner proposition in Nigeria: An econometric analysis

Recovery of Household Waste by Generation of Biogas as Energy and Compost as Bio-Fertilizer—A Review

Energetic Valorization of Cereal and Exhausted Coffee Wastes Through Anaerobic Co-digestion With Pig Slurry

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