Combined production of bioethanol and biogas from peels of wild cassava  Manihot glaziovii

Moshi, Anselm P.; Temu, Stella G.; Nges, Ivo Achu; Malmo, Gashaw; Hosea, Ken M.; Elisante, Emrode; Mattìasson, Bo

doi:10.1016/j.cej.2015.05.006

Cited by 48 publications

(22 citation statements)

References 35 publications

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“…The result for ethanol yields in this study was similar to study of Moshi et al [14] and a little higher, where their ethanol yield was 82%-84% of theoretical ethanol yield. However, it was slightly lower than the results of the study Moshi et al [15,29] which are equal to 95% and 94%. In addition, it was slightly higher when compared with the results of a study by Sivamani et al [30], where they used cassava peel and ethanol yield was 83% of the theoretical ethanol yield.…”

Section: Ethanol Production From Manihot Glazioviicontrasting

confidence: 52%

Optimization of Reducing Sugar Production from Manihot glaziovii Starch Using Response Surface Methodology

et al. 2017

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Abstract:Bioethanol is known as a viable alternative fuel to solve both energy and environmental crises. This study used response surface methodology based on the Box-Behnken experimental design to obtain the optimum conditions for and quality of bioethanol production. Enzymatic hydrolysis optimization was performed with selected hydrolysis parameters, including substrate loading, stroke speed, α-amylase concentration and amyloglucosidase concentration. From the experiment, the resulting optimum conditions are 23.88% (w/v) substrate loading, 109.43 U/g α-amylase concentration, 65.44 U/mL amyloglucosidase concentration and 74.87 rpm stroke speed, which yielded 196.23 g/L reducing sugar. The fermentation process was also carried out, with a production value of 0.45 g ethanol/g reducing sugar, which is equivalent to 88.61% of ethanol yield after fermentation by using Saccharomyces cerevisiae (S. cerevisiae). The physical and chemical properties of the produced ethanol are within the specifications of the ASTM D4806 standard. The good quality of ethanol produced from this study indicates that Manihot glaziovii (M. glaziovii) has great potential as bioethanol feedstock.

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Section: Ethanol Production From Manihot Glazioviicontrasting

confidence: 52%

Optimization of Reducing Sugar Production from Manihot glaziovii Starch Using Response Surface Methodology

et al. 2017

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“…Enzymatic hydrolysis is reported as the most promising technique for converting lignocellulosic compounds into fermentable sugars such as glucose, which can be used as a cheap carbon source for ethanol production. The main role of alkali in biomass pretreatment is the removal of lignin, concomitantly increasing enzyme effectiveness by eliminating non-productive adsorption sites, and increasing the accessibility of the enzyme to structural carbohydrates [23]. This explains the difference in the rate of bioconversion observed between the alkali combined in sequence with enzyme and without enzyme pretreatment.…”

Section: Pretreatment and Chemical Composition Of Corn Strawmentioning

confidence: 99%

Study on the Sequential Combination of Bioethanol and Biogas Production from Corn Straw

2019

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The objective of this study was to obtain two types of fuels, i.e., bioethanol and biogas, in a sequential combination of biochemical processes from lignocellulosic biomass (corn straw). Waste from the agricultural sector containing lignocellulose structures was used to obtain bioethanol, while the post-fermentation (cellulose stillage) residue obtained from ethanol fermentation was a raw material for the production of high-power biogas in the methane fermentation process. The studies on obtaining ethanol from lignocellulosic substrate were based on the simultaneous saccharification and fermentation (SSF) method, which is a simultaneous hydrolysis of enzymatic cellulose and fermentation of the obtained sugars. Saccharomyces cerevisiae (D-2) in the form of yeast cream was used for bioethanol production. The yeast strain D-2 originated from the collection of the Institute of Agricultural and Food Biotechnology. Volatile compounds identified in the distillates were measured using gas chromatography with flame ionization detector (GC-FID). CH4 and CO2 contained in the biogas were analyzed using a gas chromatograph in isothermal conditions, equipped with thermal conductivity detector (katharometer) with incandescent fiber. Our results show that simultaneous saccharification and fermentation enables production of bioethanol from agricultural residues with management of cellulose stillage in the methane fermentation process.

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“…One unanswered question in cassava peel biogasification is the unit mass question which is: "Can the peel derived from a unit mass of cassava root generate enough energy to process that unit mass of cassava root into a desired food system?" Extensive literature search found nine studies [31][32][33][34][35][36][37][38][39] that reported data on AD experiments that used cassava peel as sole substrate. However, none of these studies addressed the unit mass question.…”

Section: Introductionmentioning

confidence: 99%

Biogasification of Cassava Residue for On‐Site Biofuel Generation for Food Production with Potential Cost Minimization, Health and Environmental Safety Dividends

Aso

Pullammanappallil

Teixeira

et al. 2019

Env Prog and Sustain Energy

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Convenient energy sources like biomethane and electricity are scarce commodities in cassava producing countries that depend on wood and charcoal for energy supply. Combustion of wood and charcoal releases substances that impair human health. In 2016, about 30 million metric tons of cassava peeling residues (CPR) were generated worldwide and discharged into the environment. Apart from deforestation, loss of biodiversity and soil erosion caused by felling vegetation for wood and charcoal recovery, discharge of CPR into the environment exacerbates environmental pollution and health hazards. This study presented biogasification experiments with CPR in a simple, batch, leach‐bed, unmixed fermentor. Biofuel yield ranged from 180 to 310 (mean of 252) L CH4 kg−1 VS−1 while fermentation time ranged from 19 to 33 (mean of 27) days. The substrate contained on average 33% dry matter of which 96% was volatile, and 71% volatile solids reduction was achieved. Furthermore, all electrical and thermal energy required for producing three cassava root food products (flour, gari, and starch) could be generated on‐site using CPR as substrate for anaerobic digestion. Consequently, energy paucity, environmental contamination, health hazards associated with cassava processing effluent, and combustion of wood and charcoal, could be mitigated by biogasification of CPR. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13138, 2019

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Combined production of bioethanol and biogas from peels of wild cassava Manihot glaziovii

Cited by 48 publications

References 35 publications

Optimization of Reducing Sugar Production from Manihot glaziovii Starch Using Response Surface Methodology

Optimization of Reducing Sugar Production from Manihot glaziovii Starch Using Response Surface Methodology

Study on the Sequential Combination of Bioethanol and Biogas Production from Corn Straw

Biogasification of Cassava Residue for On‐Site Biofuel Generation for Food Production with Potential Cost Minimization, Health and Environmental Safety Dividends

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