Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı

Investıgatıon Of Usage Membrane Processes In Tertıary Waste Water Treatment

With this study, the tertiary treatment of pharmaceutical and textile industry wastewater was investigated within seperate or combined usage of microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF) processes. During the tests, treated wastewater coming from the chemical and biological wastewater treatment plants from a pharmaceutical factory in Istanbul and the biological wastewater treatment plant from a textile factory in Cerkezkoy was used.

Laboratory tests were done in three steps. On the first step, the pure water flux of the membranes that are used during the investigation were determined in different temperatures and pressures. On the second step, pharmaceutical industry wastewater was passed through the MF membrane. The permeate that was collected from MF outlet was given to UF and NF seperately. On the third step, textile industry wastewater was fed to MF and the permeate was given to NF membrane. Raw textile wastewater was also fed only to NF membrane on this step.

During the tests, the flux values and the DFZ (durchsichtsfarbzahl) and conductivity changes of the instant samples were followed. Also Chemical Oxygen Demand (COD), Suspended Solid (SS) and pH were measured in composite permeates and each membrane process’ removal efficiency was determined.

In both studies with pharmaceutical and textile industry wastewater, the best removal efficiency was reached by MF+NF combination. In pharmaceutical industry wastewater, the RES values calculated in 436 nm, 525 nm and 620 nm were 10 m^-1, 2 m^-1, 0,4 m^-1 in inlet and were decreased to 1,3 m^-1, 0,3 m^-1 and 0 in permeate. Also the COD and SS values were 678 mg/L and 293 mg/L in inlet and were decreased to 48 mg/L and 11 mg/L in permeate. In textile industry wastewater the inlet DFZ values, calculated at the same wavelengths as above, were 25 m^-1, 25,6 m^-1 and 9,2 m^-1, and were decreased to 1 m^-1, 0,8 m^-1 and 0,1 m^-1 in permeate. The COD and SS values were 180 mg/L and 157 mg/L in inlet and were decreased to 72 mg/L and 60 mg/L in permeate.

As a conclusion on the study of the pharmaceutical industry wastewater, it was came out that, even in the case of using the MF membrane alone, the color was removed in a high efficiency. Also the reached values were under the European Norms limits in DFZ parameter.

During the studies on textile industry wastewater, although there was not a big difference at the non-removed color amounts in the collected permeats between NF alone and MF+NF combination, but concerning COD, conductivity and the flux decreases, it was noticed using MF as a pretreatment of NF was extremely beneficial.

AVŞARER Burak ,

Danışman : Doç.Dr. NeşE TÜFEKÇİ

Yrd.Doç.Dr. Nüket SİVRİ (II.Danışman)

Anabilim Dalı : Çevre Mühendisliği

Programı (Varsa) :

Mezuniyet Yılı : 2007

Tez Savunma Jürisi : Doç.Dr. Neşe TÜFEKÇİ (Danışman)

Prof.Dr. Semiha ARAYICI

Doç.Dr. Gül HİSARLI

Yrd. Doç.Dr. Gülsüm YILMAZ

Yrd.Doç.Dr. Burcu ONAT