ETHANOL PRODUCTION QUIZ

Starch containing substrate

All of these

Juices from sugarcane or molasses or sugar beet

Waste product from wood or processed wood

pH 6; temperature 30°C

pH 5; temperature 30°C

pH 5; temperature 35°C

pH 6; temperature 35°C

All of these

Zygomonas mobilis

Saccharomyces uvarum

Saccharomyces cerevisiae

All of these

Impeller

Baffles

Sparger

All of these

it has more osmotic tolerance to higher sugar concentration

it has high tolerance to ethanol

it has more specific growth rate

as manure

for next fermentation

as single cell protein for animal feed

All of these

inhibits bacterial growth

promotes yeast growth

inhibits yeast growth

promotes bacterial growth

Yeast

Bacillus

Pseudomonas

E. coli

None of these

it is converted to pentose sugar

starch is not a suitable substrate for the production of ethanol

it doesn't contain amylases to hydrolyze starch

Sterilization of air supply

All of these

Sterilization of fermentor

Aeration and agitation