BIODEGRADATIVE EFFICIENCY OF CYANIDE BY Pseudomonas sp.

Abstract

Pseudomonas sp. is one of the bacteria widely studied in environmental management due to its biodegradative capacity, in this sense the objective of the present investigation was to evaluate the biodegradative efficiency of cyanide by Pseudomonas sp. at different incubation times. The study had a design, as a control group a physiological outlet solution and a bioreactor with a bubble column were used, each bioreactor contained 450 ml of MBSMG at a concentration of 500 ppm of cyanide and a pH of 8, with an inoculum at a concentration of 1.5 x 108 cells per milliliter. The cyanide concentration was assessed by titration with AgNO3 and KI. The results obtained show a cyanide biodegradation efficiency of 92.3% at 3 days of incubation, 85.8% at 7.5 days and 75.9% at 12 days; also finding an inverse correlation of 0.985 between the biodegradation efficiency and the incubation time of the bacteria by means of the Pearson Correlation. It is concluded that the highest biodegradative efficiency of Pseudomonas sp. after 3 days of incubation.