PASSIVE BIOREMEDIATION: A PRELIMINARY STUDY ON WASTE VEGETABLE OIL

Sérgio Thode Filho, Thuanny Moraes de Almeida, Cintia Patrícia Santos da Paixão, Monica Regina da Costa Marques, Elmo Rodrigues da Silva

Abstract


http://dx.doi.org/10.5902/2179460X17729

The rapid population growth and excessive consumption for goods and services, has anthropized increasingly the environment. Thus, the waste generated by it directly impact the urban and natural environments. The edible vegetable oil production estimates are three billion liters per year in the country. In the city of Rio de Janeiro, more than 20 million liters of vegetable oil are consumed per year. It is known that the waste vegetable oil can cause damage to water bodies, because the oil forms a layer on the surface that prevents the entry of sunlight, reducing photosynthesis and dissolved oxygen, killing aquatic organisms. The soils are also impacted when receiving virgin or waste vegetable oil, as this waterproofs, disrupting and causing flooding. One of the techniques commonly used in situ bioremediation is passive or natural attenuation, at which the pollutant/contaminant remains on the impacted site and by natural processes, such as biodegradation, volatilization, adsorption and dilution, decontamination of the environment occurs. This study aims to evaluate the technique of natural bioremediation, using in vitro tests, in order to remedy an artificially contaminated soil with vegetable oil virgin soy. The passive bioremediation technique or natural attenuation proved to be a good alternative in the decontamination of environments contaminated by vegetable oils. The biodegradation rate of vegetable oil was maximum around the thirtieth day. After this period, the aerobic bacterial activity has decreased production, probably due to the total consumption of oxygen of the medium.


Keywords


Passive bioremediation. Vegetable oils. Solid waste. Soil contamination.

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DOI: https://doi.org/10.5902/2179460X17729

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