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MINIMIZATION OF PHENOL AND AMMONIACAL NITROGEN IN REFINERY WASTEWATER EMPLOYING BIOLOGICAL TREATMENT

M.R. Silva, M.A.Z. Coelho, O.Q.F. Araújo

Abstract



Wastewater from refineries is usually characterized by presence of phenol and
ammoniacal nitrogen. The aim of this work was to search for a refinery wastewater
minimization employing a biological technology to reduce these pollutants.
Experimental data was obtained by treating a synthetic wastewater in a sequencing
batch reactor (SBR) operating on different operational schemes for batch scheduling.
COD, nitrate, ammonia, phosphate and phenol were monitored as well as dissolved
oxygen, pH, level and redox potential through a supervisory control software.
Reductions of 95 % were achieved for different concentrations of NH4
+ and phenol,
providing an effluent acceptable by Brazilian environmental legislation.


Keywords


phenol; refinery; wastewater treatment

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DOI: http://dx.doi.org/10.5380/reterm.v1i2.3506