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industrial-microbiology

11 Industrial Products that are derived from Microbes.

Posted on July 7, 2018August 22, 2021 by Vinod Thakur

In Industrial Microbiology, microbes are used to synthesize a number of products valuable to human beings. This industry has provided products that have deeply changed our lives and life spans. There are various industrial products that are derived from microbes such as beverages, food additives, products for human and animal health, and biofuels.

1. Beverages

Microbes especially yeast have been used from time immemorial for the production of beverages like wine, beer, whiskey, brandy or rum. For this purpose, the yeast Saccharomyces cerevisiae (commonly called Brewer’s Yeast) is used for fermenting malted cereals and fruit juices to produce ethanol.

alcholic_beverages
Microbes are important agents in the Beverages Industry.

Among these beverages, Wine and Beer are produced without distillation whereas whiskey, brandy, and rum are distilled beverages.

Also Read: How do Bacteria Become Resistant to Antibiotics?

2. Antibiotics

Antibiotics produced by microbes are regarded was one of the most significant discoveries of the twentieth century and have made major contributions towards the welfare of human society.

Many antibiotics are produced by microorganisms, predominantly by Actinomycetes in the genus Streptomycin (e.g. Tetracycline, Streptomycin, Actinomycin D) and by filamentous fungi (e.g. Penicillin, Cephalosporin)

3. Organic acids

Microbes are also used for the commercial and industrial production of certain organic acids. These compounds can be produced directly from glucose (e.g. gluconic acid) or formed as end products from pyruvate or ethanol.

Examples of acids producing microorganisms are Aspergillus Niger (a fungus) of Citric acid, Acetobacter acute (a bacterium) of Acetic Acid, Lactobacillus (a bacterium) of lactic acid and many others.

4. Amino Acids

Amino acids such as Lysine and Glutamic acid are used in the food industry as nutritional supplements in bread products and as flavor enhancing compounds such as Monosodium Glutamate (MSG).

“In early days, monosodium glutamate (MSG) was extracted from the vegetable proteins (wheat and soy).”

Monosodium_glutamate_crystalsCrystals of the food additive monosodium glutamate (MSG).

Amino acids are generally synthesized as primary metabolites by microbes. However, when the rate and amount of synthesis of some amino acids exceed the cell’s need for protein synthesis, then cell excrete them into the surrounding medium.

5. Enzymes

Many microbes synthesize and excrete large quantities of enzymes into the surrounding medium. Using this feature of these tiny organisms, many enzymes have been produced commercially. These include Amylase, Cellulase, Protease, Lipase, Pectinase, Streptokinase, and many others.

Enzymes are extensively used in food processing and preservation, washing powders, leather industry, paper industry and in scientific research.

Also Read: Free Radicals: What is their role in making us old?

6. Vitamins

Vitamins are some organic compounds which are capable of performing many life-sustaining functions inside our body. These compounds cannot be synthesized by humans, and therefore they have to be supplied in small amounts in the diet.

Microbes are capable of synthesizing the vitamins and hence they can be successfully used for the commercial production of many of the vitamins e.g. thiamine, riboflavin, pyridoxine, folic acid, pantothenic acid, biotin, vitamin b12, ascorbic acid, beta-carotene (pro-vitamin A), ergosterol (provitamin D).

7. Biofuels

Organic solvents such as ethanol, acetone, butanol, and glycerol are some very important chemicals that are widely used in petrochemical industries. These chemicals can be commercially produced by using microbes and low-cost raw materials (e.g. wood, cellulose, starch).

“Brazil was the first country to produce ethanol in large scale by yeast fermentation, utilizing sugarcane and cassava.”

Yeast (Saccharomyces cerevisiae) is used for commercial production of ethanol. This alcohol is used as motor fuel and is often referred to as green petrol.

Bioethanols_Country_Of_Origin Various sources used for the production of bioethanol in different countries of the world.

8. Single Cell Protein (SCP)

Single Cell Protein (SCP) can serve as an alternate source of energy when a larger portion of the world is suffering from hunger and malnutrition. Single cell proteins are microbial cells that are rich in protein content and can be used as protein supplements for humans and animals.

Microbes like Spirulina can be grown easily on materials like waste water from potato processing plants (containing starch), straw, molasses, animal manure, and even sewage, to produce large quantities and can serve as food rich in protein, minerals, fats, carbohydrate, and vitamins.

Also Read: What are SNPs? Why are Scientists interested in them?

9. Steroids

These are a very important group of chemicals, which are used as anti-inflammatory drugs, and as hormones such as estrogens and progesterone, which are used in oral contraceptives.

Steroids are widely distributed in animals, plants, and fungi like yeasts. But, producing steroids from animal sources or chemically synthesizing them is difficult, but microorganisms can synthesize steroids from sterols or from related, easily obtained compounds.

10. Vaccines

Vaccines are also a product of industrial microbiology. Many antiviral vaccines are mass-produced in chicken eggs or cell cultures.

The production of vaccines against bacterial diseases usually requires the growth of large amounts of the bacteria. Recombinant DNA technology is increasingly important in the development and production of subunit vaccines.

11. Pharmaceutical Drugs

Many pharmaceutical drugs are also produced by microbes e.g. Cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum.

Cyclosporin_ANeutron structure of the immunosuppressant cyclosporin A.

Statins produced by the yeast Monascus purpureus have been commercialized as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for the synthesis of cholesterol.


References:

  • Prescott, Lansing M, John P Harley, and Donald A Klein. Microbiology. Dubuque, IA: McGraw-Hill Higher Education, 2005. Print.
  • Slonczewski, Joan, and John Watkins Foster. Microbiology. New York: W.W. Norton & Co., 2009. Print.
  • Pelczar, Michael J, E. C. S Chan, and Noel R Krieg. Microbiology. New York: McGraw-Hill, 1993. Print.

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