Optimizing dilute phosphoric acid pretreatment of wheat straw in the laboratory and in a demonstration plant for ethanol and edible fungal biomass production using Neurospora intermedia.

Nair, Ramkumar B.Högskolan i Borås,Akademin för textil, teknik och ekonomi,Resource Recovery (författare)

CAPLUS AN 2016:1751717(Journal)
BACKGROUND : A method is described that uses dil. phosphoric acid for wheat straw pretreatment and subsequent ethanol and fungal biomass prodn. with the edible fungus Neurospora intermedia. Dil. phosphoric acid pretreatment of wheat straw was optimized at a lab. scale, and the results were validated in a biorefinery demonstration plant for the first time. The various conditions for the dil. acid pretreatment include such factors as phosphoric acid concns. (0.5-3.0% w/v), temp. (150-210 °C), and reaction time (5-20 min). RESULTS : The optimal pretreatment conditions were detd. as an acid concn. of 1.75% (w/v) at a temp. of 190 °C for 15 min, based on the max. enzymic digestibility with the min. inhibitor release. The efficiency of enzymic polysaccharide hydrolysis was 36% for untreated straw and 86% for straw pretreated with dil. phosphoric acid. Scale up of the pretreatment at a biorefinery demonstration plant improved the process, with the subsequent efficiency of polysaccharide hydrolysis being 95% of the theor. max. Ethanol fermn. of enzymically hydrolyzed wheat straw using N. intermedia showed an improvement in the ethanol yield from 29% (with untreated straw) to 94% (with dil. phosphoric acid pretreated straw) of the theor. max. CONCLUSION : This study opens up an alternative strategy for the efficient use of wheat straw for the prodn. of ethanol and edible fungal biomass in existing wheat-to-ethanol plants.

Lundin, MagnusHögskolan i Borås,Akademin för textil, teknik och ekonomi,Resource Recovery(Swepub:hb)MLU (författare)
Lennartsson, Patrik R.Högskolan i Borås,Akademin för textil, teknik och ekonomi,Resource Recovery(Swepub:hb)PAT (författare)
Taherzadeh, Mohammad J,1965-Högskolan i Borås,Akademin för textil, teknik och ekonomi,Resource Recovery(Swepub:hb)mjt (författare)
Högskolan i BoråsAkademin för textil, teknik och ekonomi (creator_code:org_t)

Ingår i:Journal of chemical technology and biotechnology (1986): Wiley0268-25751097-4660

Av författaren/redakt...: Nair, Ramkumar B ...; Lundin, Magnus; Lennartsson, Pat ...; Taherzadeh, Moha ...

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