Tower reactors for bioconversion of lignocellulosic material

Details Tower reactors for bioconversion of lignocellulosic material Tower reactors for bioconversion of lignocellulosic material

1997-06-18

1999-03-30

Lankford, Jr., Leon B.

Chemistry: molecular biology and microbiology

Apparatus

Bioreactor

4352891, 4352901, 4352902, 4352911, 4352913, 4352915, 4352941, C12M 134, C12M 138

Patent

active

058888063

ABSTRACT:
An apparatus for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material, in the form of a tower bioreactor, having mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards or downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets.

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