Effect of condition on sub-critical water process on the quality of bio-mass fuel originate in soybean [Glycine max] milk residue (okara)

The study reports the use of sub-critical water processing to prepare biomass fuel from Soybean Milk Residue (okara), a byproduct in the manufacture of to-fu. Preparation was carried out directly in the to-fu factory as a method to reduce harmful greenhouse gas emissions. The main results are as fol...

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Published inKinki Chugoku Shikoku Agricultural Research (Japan) no. 13
Main Authors Taira, K.(Nara-ken. Agricultural Experiment Station, Kashihara (Japan)), Yamashita, H, Takenaka, I, Hirono, K
Format Journal Article
LanguageJapanese
Published 01.09.2008
Subjects
ALIMENT A BASE DE SOJA POUR HOMME
ALIMENTOS DERIVADOS DE LA SOJA
BIOCARBURANT
BIOCARBURANTE
BIOFUELS
CARBON DIOXIDE
DIOXIDO DE CARBONO
DIOXYDE DE CARBONE
GLYCINE MAX
HEAT TREATMENT
RESIDU
RESIDUES
RESIDUOS
SOJA
SOYBEANS
SOYFOODS
TRAITEMENT THERMIQUE
TRATAMIENTO TERMICO
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Summary:The study reports the use of sub-critical water processing to prepare biomass fuel from Soybean Milk Residue (okara), a byproduct in the manufacture of to-fu. Preparation was carried out directly in the to-fu factory as a method to reduce harmful greenhouse gas emissions. The main results are as follows. 1) Optimal temperature condition of sub-critical water processing; While in the temperature range from 230degC-250degC, the collection ratio changed only slightly from 246degC-250degC, the calorific value remained constant at 25MJ, and the easily-handled carbide resulted. Consequently, processing in this temperature range is thought to be optimal. 2) Energy balance analysis of sub-critical water processing at 250degC; The energy balance, for processing okara using sub-critical water at 250degC, is positive. In a simulated utility-scale plant, for processing 10t okara per day, it would be necessary to provide 14,520MJ in the form of electrical power, but we could gain overall 18,900MJ in products of the sub-critical water processing. This implies a calculated net gain of 4,380MJ. 3) Greenhouse gas emission analysis of sub-critical water processing; As regards the reduction of greenhouse gas emission, a simulation shows that we could reduce daily emission of carbon dioxide by about 14,000kg using our sub-critical water process instead of burning. Thus, biomass fuel production by sub-critical water processing appears to have potential as a new method of using biomass resources.
Bibliography:2008008084
Q60
ISSN:1347-6238