Estudo do aumento da biodegradabilidade da água de produção de petróleo por oxidação química com ozônio

Abstract

Biological treatment of water oil production has been the subject of research. However the presence of recalcitrant substances cause inhibition in the process. Research indicates that the use of water pre-ozone production in biological reactors can result in gains in efficiency of removal of organic material. This study sought to evaluate the effects of ozonation on the biodegradability of a water oil production coming from a plant extract oil and gas basin Sergipe / Alagoas. Proceeded to the operation of a system for advanced oxidation with ozone batchwise with contact time of 1 to 6 hours in two pH values (5.5 and 7.0) by applying the doses of 8.22 and 11 , 47 gO3.L-1 . The parameters evaluated were: COD, BOD5, 20, COT, ABS254nm, apparent and true color and solid series. We observed that treatment increased up to 300% biodegradability of water production. That same high biodegradability this is still 66% below the recommended minimum for biological treatment. All color removal were above 90% higher and the application of ozone dosage led to formation of a greater number of intermediate compounds.