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Low‐Pressure Catalytic Wet‐Air Oxidation of a High‐Strength Industrial Wastewater Using Fenton's Reagent
Author(s) -
Bıçaksız Zeliha,
Aytimur Gülin,
Atalay Süheyda
Publication year - 2008
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143008x268515
Subject(s) - effluent , wastewater , reagent , chemistry , ferrous , hydrogen peroxide , chemical oxygen demand , catalysis , fenton's reagent , wet oxidation , substrate (aquarium) , industrial wastewater treatment , nuclear chemistry , pulp and paper industry , environmental chemistry , environmental engineering , fenton reaction , environmental science , organic chemistry , oceanography , engineering , geology
Wastewater from the Afyon Alkaloids Factory (Afyon, Turkey) was subjected to low‐pressure catalytic wet‐air oxidation (CWAO) using Fenton's reagent, and the optimal reaction conditions were investigated. The CWAO using Fenton's reagent was applied to the factory effluent, diluted factory effluent, and aerobically pretreated wastewater. To find the optimum quantities of reagents, ferrous iron (Fe +2 )‐to‐substrate ratios of 1:10, 1:25, and 1:50 and hydrogen peroxide (H 2 O 2 )‐to‐Fe +2 ratios of 1, 5, and 10 were investigated, and the treatment was carried out at different temperatures. High chemical oxygen demand (COD) removals were obtained at 50°C, with the Fe +2 ‐to‐substrate ratio range between 1:10 and 1:25. The change in H 2 O 2 ‐to‐Fe +2 ratios did not cause any considerable effect. Also, the percentages of COD removals were nearly the same, so the ratio H 2 O 2 :Fe +2 :1 is recommended. Aerobic pretreatment seems to be effective. On the other hand, no enhancement was observed in the case of the diluted wastewater.