Özet:
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, Fe2þ, Fe0 , and H2O2 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 [Fe2þ]¼1500mgL 1,
[H2O2]¼1750mgL 1, and pH¼4.6 for CFP; [Fe0]¼2000mgL 1, [H2O2]¼2000mgL 1,
and pH¼3 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.