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Increasing the yeast yield in alcohol fermentation

Patent:

Abstract

The yeast and ethanol yields (the latter being based on the substrate) are enhanced by adding the substrate (molasses) gradually to the suspension of inoculating yeast during the main fermentation period, passing air through the mash, ceasing both substrate addition and aeration at the end of the main period, and allowing the process to come to an end. This way 12 to 14 kg yeast (dry weight)/100 l ethanol could be obtained within 16 to 24 hours and the yeast obtained could be used as the inoculum for the next charge. For example: 11 to 16 kg yeast (or 18 to 25 l yeast suspension from the preceding charge, containing 18 to 20% dry matter) is kept in 30 to 35 l H/sub 2/SO/sub 4/ (0.74 g/100 ml) for 1 hour, diluted with H/sub 2/O and 30 kg sterile molasses to 300 l, kept at 30 to 32/sup 0/ with mild aeration for 2 hours, 1900 l 30/sup 0/ H/sub 2/O added, then 1 m/sup 3/ air/m/sup 2//hour is passed through the mixture, with the addition of 270 kg sterile molasses, and a solution of 8 kg superphosphate and 5 kg (NH/sub 4/)/sub 2/SO/sub 4/ in 100 l H/sub 2/O,  More>>
Publication Date:
Feb 01, 1964
Product Type:
Patent
Report Number:
HU 151166
Reference Number:
EDB-80-127178
Resource Relation:
Patent File Date: Filed date 15 Oct 1962
Subject:
09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES; ETHANOL; BIOSYNTHESIS; MOLASSES; FERMENTATION; YEASTS; PRODUCTIVITY; AERATION; AIR; AMMONIUM SULFATES; MEDIUM TEMPERATURE; PH VALUE; SULFURIC ACID; SUPERPHOSPHATES; WATER; ACID PHOSPHATES; ALCOHOLS; AMMONIUM COMPOUNDS; BIOCONVERSION; FERTILIZERS; FLUIDS; FUNGI; GASES; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; INORGANIC ACIDS; MICROORGANISMS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PLANTS; SULFATES; SULFUR COMPOUNDS; SYNTHESIS; 090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989); 550700 - Microbiology; 140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
OSTI ID:
7177053
Country of Origin:
Hungary
Language:
English
Submitting Site:
IEA
Size:
Pages: 8
Announcement Date:

Patent:

Citation Formats

Pelc, A, Vamos, E, Varga, L, Gavalya, S, and Dolanszky, F. Increasing the yeast yield in alcohol fermentation. Hungary: N. p., 1964. Web.
Pelc, A, Vamos, E, Varga, L, Gavalya, S, & Dolanszky, F. Increasing the yeast yield in alcohol fermentation. Hungary.
Pelc, A, Vamos, E, Varga, L, Gavalya, S, and Dolanszky, F. 1964. "Increasing the yeast yield in alcohol fermentation." Hungary.
@misc{etde_7177053,
title = {Increasing the yeast yield in alcohol fermentation}
author = {Pelc, A, Vamos, E, Varga, L, Gavalya, S, and Dolanszky, F}
abstractNote = {The yeast and ethanol yields (the latter being based on the substrate) are enhanced by adding the substrate (molasses) gradually to the suspension of inoculating yeast during the main fermentation period, passing air through the mash, ceasing both substrate addition and aeration at the end of the main period, and allowing the process to come to an end. This way 12 to 14 kg yeast (dry weight)/100 l ethanol could be obtained within 16 to 24 hours and the yeast obtained could be used as the inoculum for the next charge. For example: 11 to 16 kg yeast (or 18 to 25 l yeast suspension from the preceding charge, containing 18 to 20% dry matter) is kept in 30 to 35 l H/sub 2/SO/sub 4/ (0.74 g/100 ml) for 1 hour, diluted with H/sub 2/O and 30 kg sterile molasses to 300 l, kept at 30 to 32/sup 0/ with mild aeration for 2 hours, 1900 l 30/sup 0/ H/sub 2/O added, then 1 m/sup 3/ air/m/sup 2//hour is passed through the mixture, with the addition of 270 kg sterile molasses, and a solution of 8 kg superphosphate and 5 kg (NH/sub 4/)/sub 2/SO/sub 4/ in 100 l H/sub 2/O, the latter being added in 5 portions over 2 hours. Molasses (600 kg) is added during the main period, maintaining the pH at 5 (H/sub 2/SO/sub 4/), and the temperature at 30/sup 0/, then aeration is ceased and the mixture kept until fermentation proceeds. The 3000 l medium contains 9.6% ethanol and 1.38% yeast, respectively.}
place = {Hungary}
year = {1964}
month = {Feb}
}