Thamer J. Mohammed; Hashim M; Eman H.Z. AL-Abideen
Abstract
The industrial wastewater discharge from the North Oil Company causes ahigh industrial water pollution to the agricultural lands. The present studyaims to find the possibility method ...
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The industrial wastewater discharge from the North Oil Company causes ahigh industrial water pollution to the agricultural lands. The present studyaims to find the possibility method for treating such industrial oilywastewater, by coagulation-flocculation and sedimentation.The experimental test will deal with the characteristics and analysis ofwastewater such as turbidity, pH, TDS, T.H, and oil concentration. Also itdeals with the effect of coagulation, flocculation, and sedimentation on theremoval efficiency of oil in wastewater and other parameters. Four types ofcoagulation were used. The experimental was carried out by using Jar-test(flocculator laboratory scale).The behavior of flocculent settling was studiedin sedimentation column.It is found from the experimental results of Jar test, the optimum alumdosages are. (25,40,70 ppm), FeCl3 dosages are (4,8,20 ppm), CaO dosage are(7,15,30 ppm) and clay dosage are (2.5,5,9 g/L) for initial oil concentration(30,58,136 ppm) respectively.The experimental results are represented by mathematical empiricalcorrelation for used coagulants alone and in combination as followsR%= 66.23+ 0.326 DA + 1.17 DF + 0.85 Dc + 6.342 DL + 0.383 C0 - 0.0026 DA2+0.302DF2 – 0.013DC2- 0.496 DL2 + 00.017 C02From the polynomial equations and graphical figures it was found the oilremoval efficiency is a function of alum, FeCl3, CaO and clay dosage andinitial oil concentration. The result of sedimentation column was indicatedthat the combination of doses improves the removal efficiency and settlingtime. The above equation shows the removal efficiency of oil decreases withincreases of initial concentration.
