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Color And Cod Removal From Pharmaceutıcal Wastewater By Fenton Process

The pharmaceutical industry is well-known with the problems of  industrial wastewater treatment such as the other industries. The sources of these problems are production of drug products and variety of process which has been used. Because of the product variety, wastewater has a rich organic matter content, concentrate color and high COD value. As a result of applied process depending on product type and dose ;  pH, color and COD value of wastewater changes. In addition, pharmaceutical industry wastewater has lower biodegradability. Because of this, applying biological, chemical, physique-chemical treatment processes on pharmaceutical wastewater treatment may usually not provide high efficiency. Besides the conventional treatment methods used removal of color and COD, Fenton process, an advanced oxidation method, is gradually increasing in use. The Fenton process is based on a method which is cause of effective radicals OH by occurring reaction of FeSO₄ and H₂O₂. This method has two treatment steps. First step is provide color removal with oxidation stage and the second step is COD removal with coagulation stage.

In this study, removal of color and COD parameters with Fenton Process have been investigated as post-treatment method of Fako Pharmaceutical Company Raw Matter Factory chemical and biological wastewater treatment plant effluent.

The wastewater supplied from wastewater treatment plant of Fako Pharmaceutical Company. COD of the samples were measured as 572 mg/L. The color of 436 nm, 525 nm and 620 nm were 90,5 m^-1, 43,2 m^-1 and 29,2 m^-1, respectively. Experiments were made to determine the optimum operating conditions on the removal of COD and color. Primarily, the effect of pH on COD and color removal efficiency was tested. Optimum pH was determined as 4 to provide the high efficiency of COD and color. The optimum FeSO₄, H₂O₂ concentrations, mixing time, coagulation time and temperature were observed as 200 mg/L , 200 mg/L, 30 minute, 90 minute and 35C, respectively. Under these conditions COD value was reduced to 149 mg/L (% 74 COD removal). Color parameter was reduced 4,6 m^-1 at 436 nm, 1,2 m^-1 at 525 nm and 0,5 m^-1 at 620 nm. Thus, efficiency of color removal was achieved % 95 at 436 nm, % 97 at 525 nm and % 98 at 620 nm.

At the end of the study, while the color of the pharmaceutical raw matter factory wastewater effluent was reduced to standard value of EN ISO 7887, COD parameter was reduced to value of “Su Kirliliği Kontrolü Yönetmeliği”(Water Quality Control Regulation). The results of this study which applied of Fenton process was demonstrate that is process can be used to remove color and COD parameters from pharmaceutical wastewater.

KALELİ Burcu ,

Danışman : Prof. Dr. Hulusi BARLAS

Anabilim dalı : Çevre Mühendisliği

Yılı : 2006

Tez savunma Jürisi : Prof. Dr. Hulusi BARLAS (Danışman)

Prof. Dr. Semihe ARAYICI

Prof. Dr. Bülent KESKİNLER

Doç. Dr. Nilgün BALKAYA

Doç. Dr. Neşe TÜFEKÇİ