Study of the good nutritional conditions for the production of biological fertilizer to leave of Azotobacter

Abstract

In the current work is made a study to laboratory scale, related with the kinetic behavior of the growth of Azotobacter strain with capacity for the biological fertilizer production, spread in different cultivation means. The means Ashby is studied, being obtained a title of 3.73*109 UFC* ml-1 at one time of 72 hours of fermentation. The kinetics of the growth in the means of cultivation Dimargon shows an increment of the bacterial biomass in the time, reaching its maximum value at the 72 hours with a content of viable cells of 3.75*108 UFC* ml-1.. En substratum with cane final molasses (MFC) the strain shows a high capacity of growth and of adaptation to the conditions of the means. A product is obtained with a title of 6.0*1010 cells*ml-1 in substrate with a concentration of sugars reductors of 25 g/l. The means of culture proposed has a cost of $0.0026 for liter, inferior to the one proposed in the literature for the Ashby and the Dimargon whose cost per liter is of $0.23 and $0.09 respectively