Macroeconomics

Corn steep liquor

Engineering

Biotechnology

Bacteria

Biology

Raw material

Value added

Cellulose

Bacterial cellulose

Economics

Biochemistry

Food science

Polymer

Biopolymer

Genetics

Organic chemistry

Bacterial growth

Crystallography

Chemistry

Stillage

Xylose

Crystallinity

Pulp and paper industry

Fermentation

Brazilian Journal of Microbiology

To reduce the cost of obtaining bacterial cellulose, acidic by-products of the alcohol and dairy industries were used without any pretreatment or addition of other nitrogen sources. Studies have shown that the greatest accumulation of bacterial cellulose (6.19 g/L) occurs on wheat thin stillage for 3 days of cultivation under dynamic conditions, which is almost 3 times higher than on standard Hestrin and Schramm medium (2.14 g/L). The use of whey as a nutrient medium makes it possible to obtain 5.45 g/L bacterial cellulose under similar conditions of cultivation. It is established that the pH of the medium during the growth of Gluconacetobacter sucrofermentans B-11267 depends on the feedstock used and its initial value. By culturing the bacterium on thin stillage and whey, there is a decrease in the acidity of the waste. It is shown that the infrared spectra of bacterial cellulose obtained in a variety of environments have a similar character, but we found differences in the micromorphology and crystallinity of the resulting biopolymer.

Cost-effective production of bacterial cellulose using acidic food industry by-products