Optimisation de la biométhanisation des effluents de manioc issus de la filière de fabrication de l’attiéké (semoule de manioc)

Kpata-Konan, NE; Konan, KF; Kouame, M Kouame; Kouame, YF; Gnagne, Théophile; Kablan, Tano

doi:10.4314/ijbcs.v5i6.13

Cited by 4 publications

(6 citation statements)

References 16 publications

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“…For pH, analysis of the results obtained for the two types of digestates shows an average of 8.29 for E + U and 8.14 for E + U + C. These values could be explained by the desorption of proteins or the volatilization of acidic compounds or CO 2 during anaerobic digestion, as noted by [12] and [20]. These observations were also reported by [21] during their studies on the qualitative characterization of a liquid avicolic digestates derived from industrial biomethanization and use in fertigation of tomato plants.…”

Section: Discussionmentioning

confidence: 79%

“…In addition, new agricultural production policies encourage green agriculture. The reuse of residues or digests obtained after anaerobic digestion is stable, deodorized, largely free of pathogens and is rich in nitrogen compounds [8] [11] [12]. This digestate can be used as an amendment or biofertilizer [13] [14] for green and sustainable agricultural production.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Digestates from Anaerobic Co-Digestion of Manioc Effluent, Human Urine and Cow Dung

Edith¹,

Francis²,

Martin³

et al. 2019

JWARP

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This study focused on the characterization of digestates resulting from anaerobic digestion of manioc effluents from attiéké factories. Two types of digestate were characterized, one consisting of manioc effluent + urine and another composed of manioc effluent + urine + cow dung. As a result, these residues of bio-digestion rich in nutrients (NPK) can be used as agricultural fertilizer. Moreover, the determination of some microorganisms and heavy metals digestates allowed to better appreciate its fertilizing quality. These parameters remained in accordance with the quality standards of a digestate prescribed. These results show that digestates from anaerobic co-digestion of manioc effluents, urine and cow dung can be used without fear as an agricultural biofertilizer.

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Section: Discussionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Characterization of Digestates from Anaerobic Co-Digestion of Manioc Effluent, Human Urine and Cow Dung

Edith¹,

Francis²,

Martin³

et al. 2019

JWARP

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“…Indeed, despite the simple treatment of the experiments, the respective yields were highly important (115.01-189.16 L biogas/Kg VS; 67.97-130.89 L CH4 /Kg VS) compared to previous data of Nikiema et al, (2020, 2021) (16.55-40.04 L biogas/Kg VS and28.76-77.40 L CH4/Kg VS). Many studies showed the biogas production potential of agricultural, industrial, slaughterhouse, municipal wastes by anaerobic co-digestion or direct digestion (Kpata-Konan et al, 2011;Nikiema et al, 2015;Traoré et al, 2016;Sumardiono et al, 2022).…”

Section: Discussionmentioning

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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“…However, the effluents from cassava pressing are very acidic (Mahan, 2004;Kpata, 2005;Kpata-Konan et al, 2011) with pH below 4. The acidity of raw sewage digesters observed before feeding would be partly due to the fermentation step conducted during the attiéké manufacturing process.…”

Section: Discussionmentioning

confidence: 99%

“…However, attiéké manufacturing process generates toxic effluents due to the high content of cassava cyanide up to 500 ppm (Asiedu, 1991 ;Chuzel et al, 1995 ;Ihedioha, 2002 ;Goualo et al, 2007). These effluents are highly loaded with organic matter with COD values ranging from 6 to 50 g/L and BOD ranging from 1.5 to 35 g/L (Chuzel et al, 1995 ;Marache, 2001 ;Mahan, 2004 ;Kpata, 2005 ;Ubalua, 2007 ;Kpata-Konan et al, 2011). Untreated and directly discharged into the nature, these effluents represent a major source of pollution for the receiving environment.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Waste From Attiéké Factory: Case of Azito Village (Abidjan, Côte d’Ivoire)

Edith

Félix

Francis

et al. 2016

ESJ

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The control of the anaerobic digestion of cassava residues from attiéké factories requires their characterization to offer a better working environment to attiéké producers. This study concerns at first the quantity of solid residues of cassava, dough of crushed cassava and other waste generated by the process of attiéké production. The second aspect concerns the determination of some physicochemical parameters (COD, TKN, pH, COD/TKN). These two aspects were realized thanks to the use of a bag in synthetic fibers, a dynamometric steelyard with dial of diameter 17 cms, and the use of a gradual can of capacity 20 L. The results of this study showed that an average quantity of 1.53 tonne of manioc handled (treated) generates 1.14 m 3 of effluents and 0.16 tonne of solid waste per day. These effluents are acid with a pH ranged between 2.54 and 4.80. So they have on average a DCO of 58.79 g/L for 0,71 g/L of nitrogen. All these parameters help control the optimal conditions of anaerobic digestion of cassava effluents in the manufacturing process of attiéké.

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Optimisation de la biométhanisation des effluents de manioc issus de la filière de fabrication de l’attiéké (semoule de manioc)

Cited by 4 publications

References 16 publications

Characterization of Digestates from Anaerobic Co-Digestion of Manioc Effluent, Human Urine and Cow Dung

Characterization of Digestates from Anaerobic Co-Digestion of Manioc Effluent, Human Urine and Cow Dung

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

Characterization of Waste From Attiéké Factory: Case of Azito Village (Abidjan, Côte d’Ivoire)

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