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

M.R. Silva | Zendy; M.A.Z. Coelho | Zendy; Ofélia de Queiroz Fernandes Araújo | Zendy

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

Author(s) -

M.R. Silva,

M.A.Z. Coelho,

Ofélia de Queiroz Fernandes Araújo

Publication year - 2002

Publication title -

revista de engenharia térmica

Language(s) - English

Resource type - Journals

ISSN - 1676-1790

DOI - 10.5380/reterm.v1i2.3506

Subject(s) - wastewater , ammoniacal nitrogen , effluent , phenol , chemistry , sewage treatment , waste management , chemical oxygen demand , environmental science , pulp and paper industry , environmental engineering , organic chemistry , engineering

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.

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