مقایسه فرایندهای کمپوست و ورمی کمپوست برای پالایش کنده حفاری میدان نفتی اهواز در حضور لجن بیولوژیکی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار گروه مهندسی بهداشت محیط و عضو مرکز تحقیقات فناوری های زیست محیطی، دانشگاه علوم پزشکی جندی شاپور اهواز، اهواز،ایران

2 دانش آموخته ی کارشناسی ارشد، گروه علوم محیط زیست، پردیس علوم و تحقیقات خوزستان، دانشگاه آزاد اسلامی ، اهواز، ایران

3 استادیار گروه مهندسی بهداشت محیط و عضو مرکز تحقیقات فناوری های زیست محیطی، دانشگاه علوم پزشکی جندی شاپور اهواز، اهواز،ایران

چکیده

کنده و گل حفاری حاوی مقادیر قابل ملاحظه‌ای هیدروکربن نفتی است که علاوه بر آلودگی محیط زیست، سلامت انسان را به مخاطره می‌اندازند. هدف از این تحقیق بی‌خطرسازی کنده حفاری توسط فرایند زیستی ورمی کمپوست و کمپوست لجن فاضلاب می‌باشد. این مطالعه از نوع تجربی آزمایشگاهی بود و در آن از دو پایلوت به‌مدت دو ماه با دو تکرار با اختلاط یکسان لجن بیولوژیکی با کنده حفاری آلوده به TPH به همراه خاک اره و زائدات باغبانی به‌منظور انجام فرآیند ورمی کمپوست و کمپوست استفاده شد. به‌منظور تعیین میزان غلظت TPH باقیمانده از دستگاه GC-FID استفاده شد.نتایج این تحقیق نشان می‌دهد که پایلوت ورمی کمپوست نسبت به کمپوست راندمان بالاتری در حذف TPH دارد به طوری که بعد از 60 روز میزان TPH در توده مخلوط از مقدار اولیه 004/42 گرم بر کیلوگرم به 316/11 گرم بر کیلوگرم رسید. راندمان حذف TPHبرای پایلوت ورمی کمپوستA وکمپوست B به‌ترتیب 1/73 درصد و 3/55 درصد در پایان دوره تثبیت به‌دست آمد. همچنین میزان TPH در دو پایلوت کمپوست و ورمی کمپوست در روز 45 ام و روز 60 ام دارای اختلاف معنی‌دار بود (05/0 p< ). نتایج حاصل از این تحقیق نشان داد که فرایند ورمی کمپوست نسبت به فرایند کمپوست،توانایی بیشتری در حذف هیدروکربن‌های نفتی موجود در کنده حفاری پایه روغنی دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison of Composting and Vermicomposting Processes in Refining Drill Cutting Mud from Ahvaz Oil Field in the Presence of Biosolids

نویسندگان [English]

  • afshin takdastan 1
  • elham hosseini panah 2
  • abdalkazem neisi 3
1 Associate Professor, Department of Environmental Health Engineering, and Environmental Technologies Research Center, Ahvaz JundiShapur University of Medical Sciences, Ahvaz, Iran
2 Post-graduate student, Department of Environmental Sciences, Khuzestan Science and research Branch, Islamic Azad University, Ahvaz, Iran
3 Associate Professor, Department of Environmental Health Engineering, and Environmental Technologies Research Center, Ahvaz JundiShapur University of Medical Sciences, Ahvaz, Iran
چکیده [English]

Cutting and drilling mud contains significant amounts of petroleum hydrocarbons that are detrimental to both the environment and public health. The objective of this study was to remove the hazardous components of drill cutting mud using the two biological processes of sewage sludge vermicomposting and biocomposting. In an experimental laboratory research, two pilot composting and vermicomposting processes, each over a period of two months with 2 repetitions, were conducted using the the same biological sludge mixed with drill cuttings contaminated with total petroleum hydrocarbon (TPH) along with sawdust and yard waste. The GC-FID unit was used to determine the residual total petroleum hydrocarbon concentrations. Results showed that the vermicomposting pilot had a higher TPH removal efficiency than did the composting one so that TPH concentration in the mixed waste mass declined after 60 days from its original value of 42.004 g/kg to 11.316 g/kg. In other words, TPH removal in the pilots A (vermicomposting) and B (biocomposting) were 73/06% and 55/3%, respectively. Moreover, the TPH levels in the two composting and vermicomposting pilots on the 45th and 60th days showed significant differences (p < 0.05). The study showed that the vermicomposting process enjoys a higher capability than the composting one in removing TPH from oil-based drill cutting waste.

کلیدواژه‌ها [English]

  • Ahvaz oil field
  • TPH
  • Biological Sludge
  • Vermicompost
  • Compost
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