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    Pretreatment of Olive Oil Mill Wastewater by Two Different Applications of Fenton Oxidation Processes
    (Wiley-V C H Verlag Gmbh, 2010) Özdemir, Celalettin; Tezcan, Hayrunnisa; Şahinkaya, Serkan; Kalıpcı, Erkan
    The removal of chemical oxygen demand (COD) and phenol from olive oil mill wastewaters (OOMW) was investigated experimentally by using conventional Fenton (CFP) and Fenton type processes (FTP) with zero valent iron (ZVI). Different operational parameters such as initial pH, Fe(2+), Fe(0), and H(2)O(2) concentrations were examined. Kinetic studies in terms of COD and phenol removals for both CFP and FTP were performed. The original pH value (4.6) of OOMW for CFP was found as the optimum pH. The determined optimum conditions are [Fe(2+)] 1500 mg L(-1), [H(2)O(2)] 1750 mg L(-1), and pH = 4.6 for CFP; [Fe(0)] = 2000 mg L(-1), [H(2)O(2)] 2000 mg L(-1), and pH 3 for FTP. 82.4% COD and 62% phenol removals were performed under the optimum conditions by CFP, while 82% COD and 63.4% phenol were removed by FTP. According to the results of kinetic studies, it was observed that COD and phenol were removed by FTP more rapidly, compared to CFP. Consequently, it was determined that both CFP and FTP were effective processes for the pretreatment of OOMW.
  • Küçük Resim Yok
    Öğe
    TREATMENT OF COD WITH REMOVAL OF DICHLOROMETHANE AND CARBON TETRACHLORIDE IN THE WASTEWATER WITH UASB
    (INT SCIENTIFIC CONFERENCE SGEM, 2008) Ozdemir, Celalettin; Sen, Nejdet; Dursun, Sukru; Tezcan, Hayrunnisa
    Low concentration of chlorinates maybe found in wastewater, contaminated soils and air due to different industrial sources. Low level of Volatile Organic Compounds (VOC)'s could be removed by adsorption, incineration and biofiltration methods. These methods have some disadvantages such as removal efficiency or high operation cost. Chlorine has been removed from the chlorinated aliphatic compounds under anaerobic conditions. The aim of this study was to investigate biological treatment of DCM and CT in high flow speed reactors. Resistance capacity of microorganisms was investigated ill a designed UASB auto control system by feeding with addition of co-substrate, by loading different ratio of organic matter and VOC's, hydraulic retention time, at stable condition of COD, Volatile Fatty Acids (VFA), pH, alkalinity, temperature (35 degrees C) etc. during the anaerobic treatment. In this study, removals of DCM and CT were approximately 60 - 70 % and 98 %, respectively. At different DCM and CT doses, the highest removal efficiencies were 77,4% COD for DCM and 99,5% COD for CT, respectively.