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Updated: Sep 13, 2026

The Cultivation, Growth, and Viability of Lactic Acid Bacteria: A Quality Control Perspective
Published on: June 16, 2022
Preliminary study of L-lysine production by Bacillus species using various agricultural by-products
Ikechukwu A Ekwealor1, Orafu A Ebele
1Department of Applied Microbiology and Brewing, Nnamdi Azikiwe University, Awka, Anambra State Nigeria. amekwealor@yahoo.com
Abstract:
The production of lysine by Bacillus megaterium SP-14 and Bacillus circulans Tx-22 using agricultural by-products as carbon and nitrogen sources was assessed. Among the carbon substrates used were potato, sorghum, plantain, millet, yam, cassava, and corn starches, while the nitrogen sources include cowpea, bambara-nut, cotton seed, groundnut, soybean, and blood meals. The effect of natural nitrogen sources (1.0% w/v) and synthetic nitrogen source (4.0% w/v (NH4)2SO4) on lysine production by the Bacillus strains showed that natural nitrogen sources gave better lysine yields.
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