Estudio de la Cinética de producción del Anhídrido Carbónico en un tratamiento biológico de suelos para la Degradación de hidrocarburos.

Abstract

This research was conducted in Orellana Province, Joya de los Sachas SA 161 borehole, it is based on the kinetics study of hydrocarbon degradation in a biological treatment using CO2 concentration measurements to evaluate the treatment efficiency. The contaminated soil for CO2 measurement study was provided in remediation biopiles. The equipment used are: X 435 Testo to measure values such as: temperature (°C), pressure (hPa), humidity (%Hr), CO2 (ppm) and a GPS for geo referencing the points where the measurements are made. Monitoring conducted initially compromises characterizing the site to be remedied as a base line which is sampled every six months with daily CO2 measurements in six points of the biopile and a single measurement of a target. In order to facilitate CO2 measurement and obtain the expected results, a native bacteria spray together with urea and MAP (phosphorus) blowing material is activated by adding it through sprinkling. The probability sampling was applied completely randomized for “n” equal, on a 2793m3 biopile, where sampler tubes were placed randomly around it. The results regarding CO2 degeneration by microbial activity showed a variable range of 336 ppm minimum concentration and 2824 ppm maximum and an efficiency of 72,03% of petroleum total hydrocarbons (TPH´s) in four weeks with a 1336,37 mg/kg final value. It is concluded that the petroleum total hydrocarbons degradation kinetics enables to evaluate the biological treatment efficiency through the daily CO2 measurement, using biopiles techniques with native bacteria inoculation. It is recommended to perform a characterization of the contaminated soil initial conditions every six months to determine nutrients quantity parameters, physical characteristic and microbiological wealth, in order to monitor possible deviations in the bioremediation process.