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Article
Biotreatment of Oil Wells Drilling Waste in an Agricultural Soil

Authors: Ayad A. A. H. Abd Al-Razaq --- Muna H. Al-Joubori
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2008 Volume: 9 Issue: 2 Pages: 69-74
Publisher: Baghdad University جامعة بغداد

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Abstract

One of the most important environmental issues is the responsible effective and economic treatment of drilling waste especially oily waste.In this research two fungal isolates named Pleurotus ostreatus and Trichoderma harzianum were chosen for the first time to treat biologically the oily drilled cuttings contaminated with diesel which resulted from drilling oil wells use oil based muds (OBMs).The results showed that the fungi under study utilized the hydrocarbon of contaminated soil as a source of nutrient and growth and that both fungi can be considered hydrocarbon degrading microorganisms. The used biotreatment is cost effective process since most of the materials used in the cultivation and growth of the present fungi were available and cheap agricultural waste.The best hydrocarbon degradation was observed in case of using both fungi together with 8 % by weight microorganisms concentration ratio and with the same ratio of nutrients components expressed as carbon/nitrogen/phosphorus equal to 100/60/10 with 10/1 carbon/potassium which gave average total petroleum hydrocarbon degradation of about 395 ppm per day. Good results were obtained using the new nutrients components ratio(C/N/P=100/60/10 with C/K=10) compared to other studies applied different nutrients ratios for the same type of diesel contamination.


Article
Biotreatment Technique to Treat Oil Wells Drilling Wastes

Authors: Ayad A. A. Abd Al-Razaq --- Muna H. Al-Joubori --- Akram H. AI-Hiti
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2007 Volume: 8 Issue: 3 Pages: 37-41
Publisher: Baghdad University جامعة بغداد

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Abstract

The minimization, treatment and disposal of drilling wastes especially oily wastes are important environmental issues. In this research two fungal isolates named Pleurotuso streatus and Trichoderma harzianum were chosen carefully for the purpose of biotreatment of oily drilled cuttings which resulting from drilling oil wells using oil based muds (OBMs).A relationship of total petroleum hydrocarbon degradation in oily drilled cuttings with time has been obtained The results showed that Pleurotus ostreatus and Trichoderma harzianum can be considered hydrocarbon degrading microorganisms and the used biotreatment is cost effective process since most of the materials used in the cultivationand growth of the present fungi were available and cheap agricultural wastes.The best hydrocarbon degradation was observed in case of using both fungi together with 5 % by weight microorganisms concentration ratio (MCR) and with the same ratio of nuirients expressed as C/N/P equal to 100/50/10 nutrients components ratio which gave average total petrol eum hydrocarbon degradation of about 205 ppm per day.

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