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Treatment of Oily Wastewater | ||
| Engineering and Technology Journal | ||
| Volume 25, Issue 3, 2007, Pages 407-421 PDF (280.83 K) | ||
| DOI: 10.30684/etj.25.3.13 | ||
| Authors | ||
| Thamer J. Mohammed; Hashim M; Eman H.Z. AL-Abideen | ||
| Abstract | ||
| The industrial wastewater discharge from the North Oil Company causes a high industrial water pollution to the agricultural lands. The present study aims to find the possibility method for treating such industrial oily wastewater, by coagulation-flocculation and sedimentation. The experimental test will deal with the characteristics and analysis of wastewater such as turbidity, pH, TDS, T.H, and oil concentration. Also it deals with the effect of coagulation, flocculation, and sedimentation on the removal efficiency of oil in wastewater and other parameters. Four types of coagulation were used. The experimental was carried out by using Jar-test (flocculator laboratory scale).The behavior of flocculent settling was studied in sedimentation column. It is found from the experimental results of Jar test, the optimum alum dosages 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 empirical correlation for used coagulants alone and in combination as follows R%= 66.23+ 0.326 DA + 1.17 DF + 0.85 Dc + 6.342 DL + 0.383 C0 - 0.0026 DA 2 +0.302DF 2 – 0.013DC 2- 0.496 DL 2 + 00.017 C0 2 From the polynomial equations and graphical figures it was found the oil removal efficiency is a function of alum, FeCl3, CaO and clay dosage and initial oil concentration. The result of sedimentation column was indicated that the combination of doses improves the removal efficiency and settling time. The above equation shows the removal efficiency of oil decreases with increases of initial concentration. | ||
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