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Treatment of Oily Wastewater Produced From Old Processing Plant of North Oil Company

معالجة المخلفات النفطية الناتجة من وحدة التركيز القديم لشركة نفط الشمال

Dr. Faris Hammoodi Al-Ani

Tikrit Journal of Engineering Sciences مجلة تكريت للعلوم الهندسية
ISSN: 1813162X 23127589 Year: 2012 Volume: 19 Issue: 1 Pages: 23-34
Publisher: Tikrit University جامعة تكريت

Abstract

The main objectives of this research were to study and analyses oily wastewater characteristics originating from old-processing plant of North Oil Company and to find a suitable and simple method to treat the waste so it can be disposed off safely. The work consists of two stages; the first was the study of oily wastewater characteristics and its negative impacts. The results indicated that oil and grease were the most dominant pollutant with concentration range between 1069 – 3269.3 mg/l that must be removed; other pollutants were found to be within Iraqi and EPA standards. The next stage was the use of these characteristics to choose the proper technology to treat that wastewater. This stage was divided into two stages: the first stage was a jar tests to find the optimum doses of alum, lime and powdered activated carbon (PAC). The second stage was the treatment by a batch pilot plant constructed for this purpose employing the optimum doses as determined from the first stage to treat the waste using a flotation unit followed by a filtration-adsorption unit. The removal efficiencies of flotation unit for oil and grease, COD, and T.S.S found to be 0.9789, 0.974, and 0.9933, respectively, while the removal efficiency for T.D.S was very low 0.0293. From filtration – adsorption column the removal efficiencies of oil and grease, T.D.S, COD, and T.S.S were found to be 0.9486, 0.8908, 0.6870, and 0.7815, respectively. The overall removal efficiencies of pilot plant were 0.9986, 0.8939, 0.9921, and 0.9950, respectively. The results indicated that this type of treatment was the simplest and most effective method that can be used to treat produced oily wastewater before disposal.

الهدف من البحث هو دراسة خواص المخلفات النفطية ومحاولة ايجاد طريقة مناسبة وسهلة لمعالجتها والوصول بها الى حد مقبول للطرح. تضمن البحث مرحلتين , الأولى هي دراسة خواص للمخلفات النفطية ، حيث بينت النتائج إن هناك زيادة في تراكيز بعض العناصر وخاصة الدهون والزيوت. المرحلة الثانية انقسمت إلى قسمين, الأول تضمن أجراء فحوصات الجرة لإيجاد الجرعة المثالية الشب,الجير,ومسحوق الكاربون المنشط. أما الثاني فهو تصميم وإنشاء محطة بحثية تألفت من وحدتي معالجة رئيسيتين هي التطويف و الترشيح –الامتزاز. بينت النتائج ان لعملية التطويف القابلية العالية لإزالة الدهون والزيوت ,COD ,T.S.S وبمعدل ازالة 0.9789, 0.9740, و0.9933, على التوالي. أما عملية الترشيح - الامتزاز فكانت نسبة إزالة جميع المواد عالية جدا بمعدل إزالة 0.9486, 0.8908, 0.6870, و0.7815 للدهون والزيوت, T.D.S, COD,و T.S.S على التوالي. وكان معدل الإزالة الكلية 0.9986, 0.8939, 0.9921, و0.9950 على التوالي.

Keywords

Oily wastewater --- North Oil Company --- Pilot plant --- Filtration-adsorption unit.