Hydrocarbon-degrading bacteria in Colombia: systematic review

Abstract

Petroleum industry activities worldwide have caused pollution and resulted in environmental degradation. Microorganisms with the potential to reduce pollutant levels by degradation processes have been reported, and bacteria are among such organisms. The first study on bacterial degradation in Colombia was published in 1996. The study isolated bacteria belonging to the Pseudomonas genus from hydrocarbon-polluted sediments. Since then, different reports on degrading bacteria have been published. The objective of this systematic review is to identify and analyze all the studies on hydrocarbon-degrading bacteria performed in Colombia. To accomplish this goal, a literature search was conducted. Inclusion and exclusion criteria were applied, and 37 relevant articles were obtained. We found that 2018 was the year with the largest number of publications in Colombia, and most frequently identified bacterial genera were Pseudomonas and Bacillus. Some studies showed that the degradation of hydrocarbons is more efficient when bacterial consortia are used rather than pure cultures. This study provides information about bacteria with the potential to degrade hydrocarbons in Colombia, which in turn will be a source of information for future studies in this field.

Keywords: Bacteria; Colombia; Degradation; Hydrocarbons.

Fig. 1

PRISMA flowchart showing the selection of the research articles of hydrocarbon-degrading bacteria in Colombia

Fig. 2

Number of studies on HDB in Colombia between 1996 and 2020

Fig. 3

Map of Colombia showing the number of publications per department and oil production by region

Fig. 4

Hydrocarbon degrading bacteria (HDB) in Colombia and their frequency in the analyzed publications