Optimization of pretreatment, process performance, mass and energy balance in the anaerobic digestion of Arachis hypogaea (Peanut) hull

Dahunsi, S. O.; Oranusi, S. U.; Efeovbokhan, Vincent Enon

doi:10.1016/j.enconman.2017.02.063

Cited by 65 publications

(37 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, the members of the genus Methanococcus, Methanosarcinae and Methanosaeta reported in this study are well known methanogens which converts acetone and other products of the acetogenesis stage to methane as the major product of anaerobic digestion (Ennouri et al, 2016). Earlier, Dahunsi et al (2017b) reported that the availability of rich population and diversity of anaerobic microbes usually enhance substrate degradation, improves biogas generation and quality as well as ensuring the production of nutrient-rich digestate biofertilizer (Dahunsi et al, 2017b). Biogas generation in this study was at an appreciable level and when compared with those from other bioresources earlier utilized, C. papayas fruit peels has good efficiency in terms substrate interaction and microbial dynamics.…”

Section: Discussionsupporting

confidence: 51%

“…By this, it was determined if the extra gas yield obtained from digesting the pretreated substrates could cover the initial cost of thermal energy and NaOH. Therefore, the thermal energy required (TER) in kWh/t TS for pretreating C. papayas shoot mixture from an initial temperature of 25 to a final 55 C was computed using a simple equation (Dahunsi et al, 2017b) as shown below:…”

Section: Energy Balance and Efficiency Assessment Of Thermo-alkaline mentioning

confidence: 99%

“…As shown in Table 6, the combined heat and power (CHP) system was used to evaluate the energy balance and economic feasibility of applying thermo-alkaline pretreatment to C. papayas shoot using a heat and electrical efficiencies of 50 and 35% respectively (Dahunsi et al, 2017b). In determining the TER for carrying out the thermoalkaline pretreatment procedure for C. papayas shoot, the energy needed to raise the temperature of 35 g TS/L mixture of C. papayas shoot from the initial temperature of 25 C to the final of 55 C was determined using 4.18 kJ/kg C as the specific heat of water to evaluate the specific heat of the mixture while the loss of heat was neglected (Zupancic and Ros, 2003).…”

Section: Energy Factors Pretreated Experiments Untreated Experimentsmentioning

confidence: 99%

See 2 more Smart Citations

Cleaner energy for cleaner production: Modeling and optimization of biogas generation from Carica papayas (Pawpaw) fruit peels

Dahunsi

Oranusi

Efeovbokhan

2017

Journal of Cleaner Production

View full text Add to dashboard Cite

In this study, the potentials of pretreated and untreated Carica papayas fruit peels for biogas generation was evaluated alongside its process optimization after employing the combination of mechanical and thermo-alkaline pretreatment methods. The peel was anaerobically digested using a consortium of microorganisms from cattle rumen content as inoculum. A batch system designed by the Central Composite Design (CCD) was employed. The physicochemical and microbial characteristics of the substrates and inoculum as well as the constituent of the generated biogas were evaluated using standard methods and results showed elevated levels of most elements after anaerobic digestion. The most feasible experimental biogas yields were 0.1839 m 3 /kg VS and 0.1361 m 3 /kg VS for the pretreated and untreated experiments respectively. Microbiologically, members of the genus Clostridium dominated the microbial flora and their succession patterns were affected by temperature and pH. The methane and carbon dioxide content of biogas from both experiments were 61.5± 2.5%; 24± 1% and 52 ± 2%; 25± 1.5% respectively. The Response Surface Methodology (RSM) and the Artificial Neural Networks (ANNs) were employed in data optimization. Based on the optimized values, the predicted biogas yield for RSM was 0.1895 m 3 /kg VS and 0.1839 m 3 /kg VS for ANNs in the pretreated experiment. For the experiment without pretreatment, the RSM predicted yield was 0.1361 m 3 /kg VS while that of ANNs was 0.1392 m 3 / kg VS. In all, there was a 26.5% increase in predicted biogas yield in the pretreated experiment over the untreated. Further usage of pawpaw peels for biofuels generation is advocated.

show abstract

Section: Discussionsupporting

confidence: 51%

Section: Energy Balance and Efficiency Assessment Of Thermo-alkaline mentioning

confidence: 99%

Section: Energy Factors Pretreated Experiments Untreated Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Cleaner energy for cleaner production: Modeling and optimization of biogas generation from Carica papayas (Pawpaw) fruit peels

Dahunsi

Oranusi

Efeovbokhan

2017

Journal of Cleaner Production

View full text Add to dashboard Cite

show abstract

“…They include shoots of Tithonia diversifolia (Mexican sunflower), and Chromolaena odorata (Siam weed). Others are fruit peels of Carica papaya (pawpaw), Telfairia occidentalis (fluted pumpkin), Ananas comosus (pineapple), Citrullus lanatus (water melon), Cucumeropsis mannii (melon) and the hull or pod of Arachis hypogaea (peanut or groundnut), Theobroma cacao (Cocoa) and Kola nitida (kolanut) [14,[65][66][67][68][69][70][71][72]. Despite the huge availability of these biomasses in their various locations of production, they mostly end up as solid wastes in the environment as little or no usage has been sought for them over the years.…”

Section: Suitable Feedstock For Biogas Generation In Sub-saharan Africamentioning

confidence: 99%

Biofuel Development in Sub-Saharan Africa

Dahunsi¹,

Shoyombo²,

Fagbiele³

2019

Anaerobic Digestion

View full text Add to dashboard Cite

The quest for renewable and sustainable energy generation is fast becoming widespread across Africa due to the understanding that there is a need to seek an alternative to fuels of fossil origin, which currently sustains the largest portion of the world's energy need. Research into the generation of renewable fuels had been on-going in continents like Europe, South America, Asia, and other developed countries bearing in mind the extinction nature of fossil fuels. Globally, attentions are being drawn to fuel generation from biomass and its derivatives such as lignin, triglycerides, cellulose, and hemicelluloses. The aim is to use such fuels for cooking and heating and in vehicles, jet engines, and other applications. Therefore, the integration of the African continent in the race for biofuel production is germane in the quest for survival and developments considering favorable factors like climate, soil, and land mass among other environmental-friendly resources in different African countries.

show abstract

“…This residue is commonly used as fertilizer, poultry farm bedding, energy source by combustion and others. Notwithstanding, several research groups have been studying its use for feed-making, paper production (Anike et al, 2016) and biofuels obtention (Dahunsi et al, 2017;Nisamaneenate et al, 2015;. In this sense, new techniques should be evaluated for the adequate treatment of this residue in order to prepare it for bioethanol production.…”

Section: Peanut Wastesmentioning

confidence: 99%

Evaluation of the acid pretreatment of agroindustrial waste assisted by high-intensity ultrasound for further bioethanol production

Polachini¹

View full text Add to dashboard Cite

ACKNOWLEDGMENTSThis study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Finance Code 001. This study was also financed by CAPES to develop part of this PhD thesis in Spain under the grant number 88881.132626/2016-01. Thanks to the São Paulo Research Foundation (FAPESP) (Grant number 2017/06518-2) for their financial support to develop this project.At first, I would like to thank the Universitat Politècnica de València (UPV) and ASPA de amido) e no comportamento reológico (maior viscosidade) das suspensões prétratadas na presença de ultrassom. O campo acústico produzido nas suspensões sofreu uma redução durante a hidrólise, possivelmente devido às referidas alterações. Assim, pode-se concluir que o ultrassom de alta intensidade é uma tecnologia interessante para intensificar os pré-tratamentos de resíduos da agroindústria para a produção de bioetanol.Palavras-chave: Biomassa. Propriedades físicas. Campos acústicos. Hidrólise.Cinética. ABSTRACTThe pre-treatment of agroindustrial wastes is one of the most complex steps of their conversion process into bioethanol. This step consists basically of applying physical or chemical treatments in biomass in order to obtain carbohydrates partially hydrolyzed and more accessible for future action of enzymes and microorganisms. In this sense, the use of high-intensity ultrasound has been shown as a technology with an interesting potential, in combination with conventional methods, to enhance the mass and energy transfer processes. In the present study, it was characterized agroindustrial residues such as cassava bagasse, peanut shells and artichoke residues as potential materials for the production of bioethanol after acid pretreatment with and without the application of ultrasound. Thus, the different biomass/acid solutions systems were characterized according to their thermophysical properties (density, specific heat, thermal diffusivity and thermal conductivity) and rheological behavior. The acoustic fields generated in these different systems during ultrasound application were also characterized by a calorimetric method. Then, the ultrasonic intensity obtained in each case was related to the termophysical and reological properties. Subsequently, the kinetics of reducing and total sugar release and the structural changes produced in the suspensions considered during the pretreatments in acid solutions with conventional agitation or assisted by ultrasound were determined. The results obtained indicated that suspensions with higher acid concentration and higher solids content showed lower heat transfer capacity, given by the higher values for specific heat, thermal diffusivity, thermal conductivity. The same suspensions presented higher values of density and viscosity, which leads to greater resistance to flow. This fact was attributed, not only to the high viscosity, but also to the appearance of non-Newtonian rheological behavior as showed by the fitting of Herschel-Bulkley model. In these cases, the suspensions cont...

show abstract

Optimization of pretreatment, process performance, mass and energy balance in the anaerobic digestion of Arachis hypogaea (Peanut) hull

Cited by 65 publications

References 63 publications

Cleaner energy for cleaner production: Modeling and optimization of biogas generation from Carica papayas (Pawpaw) fruit peels

Cleaner energy for cleaner production: Modeling and optimization of biogas generation from Carica papayas (Pawpaw) fruit peels

Biofuel Development in Sub-Saharan Africa

Evaluation of the acid pretreatment of agroindustrial waste assisted by high-intensity ultrasound for further bioethanol production

Contact Info

Product

Resources

About