ارزیابی انرژی و اقتصادی تولید بیودیزل از روغن تفالۀ زیتون با رویکرد چرخۀ زندگی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، گروه مهندسی مکانیک ماشین‌های کشاورزی، دانشگاه تهران، ایران

2 دانشیار مهندسی مکانیک ماشین‌های کشاورزی، دانشگاه تهران، ایران

3 دانشیار مهندسی مکانیک ماشین‌های کشاورزی دانشگاه تربیت مدرس، ایران

4 استاد مهندسی مکانیک ماشین‌های کشاورزی دانشگاه تهران، ایران

5 دانشیار، گروه مهندسی بیوسیستم، دانشکدۀ کشاورزی، دانشگاه تبریز، ایران

چکیده

هدف از تحقیق حاضر ارزیابی چرخۀ حیات انرژی و اقتصادی تولید بیودیزل از روغن تفالۀ زیتون با استفاده از امواج فراصوت است. بدین منظور تولید بیودیزل در قالب چرخۀ حیات متشکل از مراحل تولید کشاورزی زیتون، حمل‌و‌نقل، روغن‌کشی زیتون، روغن‌کشی تفالۀ زیتون، و تولید بیودیزل بررسی شد. نتایج نشان داد که میزان انرژی ورودی در طی چرخۀ حیات تولید بیودیزل براساس مدل تخصیص جرم و تخصیص اقتصادی به ‌ترتیب 91/2601 و 04/3805 مگاژول بر هکتار بوده است. میزان انرژی خروجی (بیودیزل) نیز 36/3489 مگاژول بر هکتار محاسبه شد. شاخص‌های انرژی نیز برای تولید بیودیزل محاسبه شد که عبارت بودند از: بازده انرژی، بهره‌وری انرژی، خالص انرژی، و نسبت انرژی فسیلی که با توجه به نوع مدل تخصیص (جرمی‌‌ـ‌‌اقتصادی) به ‌ترتیب برابر با 34/1; 92/0 (بدون واحد)، 04/0; 03/0 لیتر بر مگاژول، 50/1413; 68/315)-( مگاژول برهکتار، و 67/1; 93/0 (بدون واحد) محاسبه شد. شاخص‌های اقتصادی محاسبه‌شده برای تولید بیودیزل عبارت‌اند از: ارزش تولید ناخالص، بازده ناخالص، بازده خالص، نسبت سود به هزینه، و بهره‌وری که به ترتیب برابر با 24/3 میلیون ریال بر هکتار، 02/1 میلیون ریال بر هکتار، 01/1 میلیون ریال بر هکتار، 45/ 1 (بدون واحد)، و 43/48 لیتر بر میلیون ریال محاسبه شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Energy and economic assessment of biodiesel production from olive pomace oil: a lifecycle approach

نویسندگان [English]

  • Mohammad Ali Rajaeeifar 1
  • Asadolah Akram 2
  • Barat Ghobadian 3
  • Shahin Rafiee 4
  • Reza Abdi 5
1 MSc graduated, Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
2 Associate Professor, Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
3 Associate Professor, Tarbiat Modares University, Mechanical Engineering, Jalal ale Ahmad highway, Tehran, Iran
4 Professor, Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
5 Associate Professor, Department of Biosystems Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
چکیده [English]

The aims of this study were to assess the energy and economic flows of biodiesel production from olive pomace oil using transesterification method with ultrasound waves. For this purpose biodiesel production from this feedstock were examined through a life-cycle process with considering five main stages of agricultural production, transportation, olive oil extraction, pomace oil extraction and biodiesel production. The results revealed that total energy input were 2601.91 and 3805.04 MJ/ha based on mass-based allocation and economic-based allocation model, respectively. Total energy output (biodiesel as the final outcome) was found to be as 34898.36 MJ/ha. Some energy indicators for production of biodiesel include: energy efficiency, energy productivity, net energy and fossil energy ratio (FER), which were 1.34-0.92 (with no unit), 0.04-0.03 l/MJ, 1413.50-(-) 315.68 MJ/ha, 1(with no unit), respectively for mass-based and economic-based allocation. The share of indirect energy and non-renewable energy were higher than the share of direct energy and renewable energy. Analysis of economic performance indicates that total production value, gross return, net return, benefit to cost (ratio) and productivity were 3.24 million Rial/ha, 1.02 million Rial/ha, 1.01 million Rial/ha, 1.45 (with no unit) and 48.43 l/ million Rial respectively.

کلیدواژه‌ها [English]

  • biodiesel production
  • Lifecycle
  • Olive pomace oil
  • transesterification
  • Ultrasound waves
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