Energy balance and GHG-abatement cost of cassava utilization for fuel ethanol in Thailand

Nguyen, Thu Lan T.; Gheewala, Shabbir H.; Garivait, Savitri

doi:10.1016/j.enpol.2007.03.012

Cited by 147 publications

(72 citation statements)

References 7 publications

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“…For example, in Brazil, sugar cane is the main raw material for ethanol production (Dos Santos et al, 2012). In the United States, bioethanol is produced from corn starch (Nguyen et al, 2007). However, this triggers the debate over food and feed versus fuel.…”

Section: Gallonsmentioning

confidence: 99%

Development of low cost medium for ethanol production from syngas by Clostridium ragsdalei

Gao

Atiyeh

Phillips

et al. 2013

Bioresource Technology

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Section: Gallonsmentioning

confidence: 99%

Development of low cost medium for ethanol production from syngas by Clostridium ragsdalei

Gao

Atiyeh

Phillips

et al. 2013

Bioresource Technology

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“…Apart from that, cassava can endure drought conditions, and can also withstand severe acidic soil conditions. Cassava does not need substantial care, has high yield per surface, and has a low cost of production compared with other types of crops 7,8 . The use of cassava as a raw material to produce ethanol can therefore be a mean of financially assisting cassava farmers.…”

Section: Introductionmentioning

confidence: 99%

Ethanol production from cassava using a newly isolated thermotolerant yeast strain

Kaewkrajay¹,

Dethoup²,

Limtong³

2014

ScienceAsia

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Efficient ethanol production using thermotolerant yeast strains was carried out with a newly isolated yeast strain called 267. Strains were isolated with an enriched technique consisting of a blackstrap molasses medium supplemented with 40 ml/l of ethanol at 25-28°C. The results revealed that 33 strains produced ethanol at 45°C in the cassava starch hydrolysate medium, pH 4.5, which was composed of 180 g/l reducing sugar and 0.5 g/l (NH 4 ) 2 SO 4 , with a shaking speed of 120 rpm. The highest ethanol concentrations (26.2, 26.2, 23.6, and 22.5 g/l) were found from Pichia kudriavzevii strains PBB511-1, TM512-2, CPY514-1, and TG514-2, respectively. The yeast strain PBB511-1, which produced the highest ethanol yield, was selected for ethanol production in the shaking flask at 45°C. Ethanol production reached the highest level after 36 h in a medium composed of 180 g/l reducing sugar, 0.5 g/l (NH 4 ) 2 SO 4 , 0.5 g/l KH 2 PO 4 , 0.5 g/l MgSO 4 · 7 H 2 O, and 1 g/l yeast extract. It produced 37 g/l ethanol, with a productivity of 1.03 (g/l)/h and a yield of 40% of the theoretical yield. The ethanol production by batch fermentation at 45°C was performed in a 7-l jar fermenter with an agitation speed of 300 rpm and an aeration rate of 0.2 vvm throughout the fermentation. The results implied that the maximum ethanol concentration was 42.4 g/l after 48 h, at a rate of 0.88 (g/l)/h and a yield of 46% of the theoretical yield.

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“…To produce CFE, cassava ethanol with a purity of more than 99.5% is blend with gasoline at 10% volume (E10). Cassava ethanol have to fulfil two criteria in order to serve as a suitable substitute for the existing conventional gasoline, namely positive NEB with regards to both production and use as well as reduced GHG emissions (Nguyen et al, 2007). In line with that, the objectives of the present study were to evaluate the energy balance and renewability of CFE in Malaysia based on the LCA approach, and to estimate the GHG emissions of CFE in Malaysia.…”

Section: Introductionmentioning

confidence: 93%

Energy and environmental assessments of bioethanol production from Sri Kanji 1 cassava in Malaysia

Hanif¹,

Mahlia²,

Aditiya³

et al. 2017

Biofuel Res. J.

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Please cite this article as: Hanif M., Mahlia T.M.I., Aditiya H.B., Abu Bakar M.S. Energy and environmental assessments of bioethanol production from Sri Kanji 1 cassava in Malaysia. Biofuel Research Journal 13 (2017) According to the Malaysia's biofuel policy, renewable fuels are crucial for energy sustainability in the transportation sector in the future. This study was aimed to evaluate the potential of bioethanol production from Sri Kanji 1 cassava in Malaysia in terms of energy efficiency and renewability, as well to estimate the potential greenhouse gas (GHG) emissions reduction in CO 2 equivalent. Bioethanol production process from cassava includes cassava farming, ethanol production, and transportation in which the primary energy consumption was considered. The Net Energy Balance (NEB) and Net Energy Ratio (NER) of 25.68 MJ/L and 3.98, respectively, indicated that bioethanol production from Sri Kanji 1 cassava in Malaysia was energy efficient. From the environmental perspective, the GHG balance results revealed that the production and distribution of 1 L of Cassava Fuel Ethanol (CFE) could reduce GHG emissions by 73.2%. Although found promising in the present study, Sri Kanji 1 cassava as bioethanol feedstock should be further investigated by constructing an actual ethanol plant to obtain real life data. GRAPHICAL ABSTRACT ARTICLE INFO ABSTRACT

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Energy balance and GHG-abatement cost of cassava utilization for fuel ethanol in Thailand

Cited by 147 publications

References 7 publications

Development of low cost medium for ethanol production from syngas by Clostridium ragsdalei

Development of low cost medium for ethanol production from syngas by Clostridium ragsdalei

Ethanol production from cassava using a newly isolated thermotolerant yeast strain

Energy and environmental assessments of bioethanol production from Sri Kanji 1 cassava in Malaysia

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