Title of article :
Complete treatment of olive mill wastewaters by electrooxidation
Author/Authors :
Umran Tezcan Un، نويسنده , , Altay، Umit نويسنده , , Koparal، A. Savas نويسنده , , Ogutveren، Ulker Bakir نويسنده ,
Issue Information :
روزنامه با شماره پیاپی 3 سال 2008
Pages :
8
From page :
445
To page :
452
Abstract :
Laboratory scale electrochemical experiments on a olive mill wastewater (OMW) were performed to obtain discharge quality which meets the regulations requirement without any pre- or additional treatment. The process has been examined through the dependence of chemical oxygen demand (COD), oil-grease, phenol and turbidity on electrolysis duration. The influence of current density (25, 45, 65, 75, 85, 105, 135mAcm−2), sodium chloride concentration (1, 2, 3, 5 M), recirculation rate of OMW (1.1, 4.6, 7.9 cm3 s^−1) and temperature (7, 20, 40^ ◦C) on the rate of pollutants abatement and the response of the system and specific energy consumption were evaluated. Based on the results obtained from laboratory experiments, the removal rates of organics increased with the increase of applied current density, sodium chloride concentration, recirculation rate and temperature. The results also indicated that specific energy consumption (SEC) ranged between 5.35 and 27.02 kWh (kg COD)^−1 decreased with increasing NaCl concentration, recirculation rate and temperature whereas it increased with increasing current density. The initialCODconcentration of 41,000 mg L^−1 was reduced to 167 mg L^−1 (corresponding to 99.6% removal) which complies with legal requirements while almost complete conversion of phenol, 99.85% turbidity removal, 99.54% oil-grease removal were achieved with the running cost of 0.88 (kg COD)^−1 after 7 h electrolysis at the conditions of 135mAcm^−2, 2M NaCl, 7.9 cm3 s^−1, 40^◦C.
Keywords :
Electrooxidation , phenol , COD , Olive mill wastewater
Journal title :
Chemical Engineering Journal
Serial Year :
2008
Journal title :
Chemical Engineering Journal
Record number :
121125
Link To Document :
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