Valorization of Agricultural Waste: Theoretical Estimation and Experimental Biomethane Yield from Cashew Nut Hulls

Nikiema, Mahamadi; Somda, Marius K.; Sawadogo, Joseph B.; Dianou, Dayéri; Traoré, Alfred S.; Ouattara, Aboubakar S.

doi:10.4236/jsbs.2020.104009

Cited by 11 publications

(7 citation statements)

References 57 publications

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“…CH4 with wastewater and mixed inoculums, respectively. Similar results was obtained by our previous study(Nikiema et al, 2020) with yields of 46.840 CH4 L. (Kg VS) -1 and 1.982 CH4 L. (Kg VS) -1 upon old and fresh shells, respectively. Indeed, wastewater contains a microbial consortium very active in the degradation of complex substrates.…”

supporting

confidence: 91%

“…Leitão et al (2011) studied anaerobic digestion of cashew bagasse, but found no conclusive results given the complexity of this substrate. Nikiema et al (2020) indicated the feasibility of biogas production from cashew nut shells and found experimental biochemical methane potential (BMP) was 46.84 CH4 L. (Kg VS) −1 and 1.98 CH4 L. (Kg VS) −1 for old and fresh shells, respectively. However, theoretical values could reach up to 526.206 CH4 L. (Kg VS) −1 and 666.937 CH4 L. (Kg VS) −1 for old and fresh shells, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Inoculums Source and Pretreatment on Biogas Production from Cashew Nut Shells (Anacardium occidentale)

Nikiema¹,

Sawadogo²,

Somda³

et al. 2021

IJEAB

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supporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Influence of Inoculums Source and Pretreatment on Biogas Production from Cashew Nut Shells (Anacardium occidentale)

Nikiema¹,

Sawadogo²,

Somda³

et al. 2021

IJEAB

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“…Acidic pH of cashew nut hull (CH) and cashew almond skin (CS) (5.86 and 6.44, respectively), as observed in this study, was this result was reported by Nikiema et al (2020Nikiema et al ( , 2021. These latter found a pH 4.29 and 6.41 for fresh and 8 years-aged cashew nut shells, respectively.…”

Section: Discussionsupporting

confidence: 85%

“…Recent studies (Nikiema et al, 2020(Nikiema et al, , 2021 also exhibited the ability to degrade CN shells by anaerobic digestion using thermal and biological treatments for fermentation culture. However, the experimental biogas yield was significantly lower than theorical estimation.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic co-digestion of agro-industrial cashew nut wastes with organic matters for biogas production: case of cashew nut hull and cashew almond skin

Sawadog,

Barsan,

Nikiema

et al. 2023

Int. J. Bio. Chem. Sci

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The cashew nut wastes (CNW), more released in the environment by cashew nut transforming units, are underused based on bioenergy. This study aimed at evaluating the biogas production by the anaerobic codigestion of CNW with various organic feedstocks. Physicochemical parameters and lower heating value (LHV) of cashew nut hull (CH) and cashew almond skin (CS) were determined. Batch cultures of each waste, supplemented to pig manure (PM), cow dung (CD), fermentation sludge (FS), activated sludge (AS) and Macrotermes bellicosus termite gut homogenate (TGH), were performed in anaerobic and mesophilic conditions. The biogas and methane (CH4) were measured. CNW were acid (pH 5.86-6.44), with 86.80-92.38% volatile solids (VS) and slightly high carbon/nitrogen ratio (31.94-37.79). The LHV was 23.094 MJ/Kg and 18.113 MJ/Kg for CH and CS, respectively. The highest yields were retrieved with the co-digestion PM-CH (189.16 L biogas.kg-1 VS, 130.89 L CH4.kg-1 VS, and 69.2% CH4) and CD-CS (159.85 L biogas.kg-1 VS, 99.58 L CH4.kg1 VS, and 62.3% CH4). Therefore, to boost biogas and biomethane yield, it is necessary to adjust the C/N ratios to the optimal values, and maintain the pH to the neutral, and combine PM and CD as inoculum during the digestion process of CNW.

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“…The same remark of pH were also reported in the works of Moletta and al in 2008 [24] their study on anaerobic digestion as well as Kalloum et al [15] in 2007 who worked on the influence of pH on biogas production from household waste. Low pH values were also reported by Nikiema et al [25] in 2020.…”

Section: Figure (2)supporting

confidence: 74%

Impact of the phytochemical composition of shea butter churning sludge on the quality of its biogas

2023

JCBSC

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The world is confronted today to waste management and the growing energy crisis, combined with the effects of global warming. The processing activities of local products such as shea nuts are sources of waste that pollute the environment and their valorization in the way of improving the quality of population's life is necessary. It is the reason that this work was undertaken during this study. In this case, the phytochemical screening of the churning sludge and other substrates as well as their anaerobic digestion were carried out in order to determine some physicochemical parameters and appreciate the methanization power of this waste. The results obtained showed that the churning sludge contains organic compounds which can undergo methanization. The quantity of biogas produced was found to be higher with the churning sludge (3.1 L) and good average digestion temperature (26.22°C). The pH values in the digesters varied between 6.38 and 4.38. Finally, we remark that after four days, the biogas obtained from this waste contain much gases such as methane (CH4 : 22.75%), dioxide of carbon (CO2 : 2.5% for) and Sulfur of hydrogen (H2S : 2%). These results show after comparison that churning sludge has a very good potential for biogas production and could be promoted in the energy field.

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Valorization of Agricultural Waste: Theoretical Estimation and Experimental Biomethane Yield from Cashew Nut Hulls

Cited by 11 publications

References 57 publications

Influence of Inoculums Source and Pretreatment on Biogas Production from Cashew Nut Shells (Anacardium occidentale)

Influence of Inoculums Source and Pretreatment on Biogas Production from Cashew Nut Shells (Anacardium occidentale)

Anaerobic co-digestion of agro-industrial cashew nut wastes with organic matters for biogas production: case of cashew nut hull and cashew almond skin

Impact of the phytochemical composition of shea butter churning sludge on the quality of its biogas

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