Isolation and selection of bacteria with the capacity to degrade compostable bags to different physical-chemical treatments

Abstract

Objective: To evaluate the bacteria belonging to fertile soils of cultivars in the area, which were isolated and selected with the ability to degrade compostable bags to different physical- chemical treatments. Methodology: The research had a quantitative approach, cross-sectional pre- experimental design, applied type and explanatory level. The population under study was made up of the fertile soils of the coastal zone of Huaura and Barranca provinces (LimaPeru), taking a sample of 45 portions of soil corresponding to eight (8) representative cultivars ofthe region through sampling by conglomerates.The variable under study was the porosity or degradation index measured in micrometers, obtained by planting bacteria in the plastic ofbiodegradable bags.As a statistical technique, the simple ANOVA and its subsequent Tukey test were used to determine the real differences.Results: There's a significant difference between the cultivars regarding the bacteria attached to the soil of the plant that biodegrade the compostable material (p =.015); being Chinese onion and corn the cultivars with a higher average of degradation and that do not differ significantly (p = .161). The biodegradation speed is high in the first month, decreasing when it reaches 4 months. Conclusions: After physical-chemical analysis, it is concluded that the colonies of bacteria that best degrade the compostable material are those associated with growing Chinese onions, these strains are called E23_1C, E7_2A, E7_2B, E23_1B.