تأثير تغيير pH المياه الناتجة عن معاصر الزيتون في المعالجة الأنودية لهذه المياه

In this study, we have used potassium dichromate to oxidize organic compounds, presented in olive oil waste water, ( O.O.W.W ) to indicate the COD index of the water . It was seen that increasing the concentration of O.O.W.W will increase the consumption of K2 Cr2O7 ( P. D .C ) in the range of (1% - 10% ) , using distilled water for diluting .The COD values were as high as 200000 mg/l. This indicates the high content of organic compounds in O.O.W.W. We used the anodic oxidation to diminish the above mentioned organics in the water. There was a small effect of decreasing COD index, when acidic ( normal) O.O.W.W was used. It had a high conductivity for electrical direct current. We studied the effect of increasing the (pH) of the water adding needed quantities of Calcium Hydroxide Ca(OH)2 , prepared in our lab. This Hydroxide optimizes the direct current passing the electrochemical cell.. Using anodes of cupper gives a decrease to ∆ COD up to 60%, for anodes of Pb , up to 50% and a low ∆ COD i .e . 25% for anodes of Sn , and 6% for Graphite anodes, (that is for pH = 4 ). When changing the pH value of the original O.O.W.W between (8,9,10), the results were (6~8 %) for these values of pH and Graphite anodes.