قابلیت تولید سوخت های زیستی از ریز جلبک های دریایی

نوع مقاله: مروری

نویسندگان

1 کارشناسی ارشد زیست فناوری دریا، دانشکده علوم و فنون دریایی، دانشگاه خلیج فارس بوشهر

2 استادیار گروه زیست فناوری دریا، دانشکده علوم و فنون دریایی، دانشگاه خلیج فارس بوشهر

چکیده

چکیده
سوخت‌های فسیلی بخش چشمگیری از مصرف انرژی را تشکیل می‌دهند، اما دارای معایبی مانند آلودگی هوا، تولید گازهای گلخانه‌ای و در نتیجه گرمایش جهانی هستند. سوخت‌های زیستی دارای بار آلودگی کمتری هستند و از منابع تجدیدپذیر تولید می-شوند و می‌توانند جایگزین مناسبی برای سوخت‌های فسیلی باشند. در این میان، سوخت‌های ریزجلبکی دارای اهمیت هستند زیرا ریزجلبک‌ها دارای نرخ رشد بالا هستند، در زمین‌های غیر قابل کشت با میزان کم آب و در آبهای شور کشت می‌شوند و توانایی بالای تثبیت کربن‌دی‌اکسید را دارند. همچنین در برابر سوخت‌های فسیلی نسبت تولید آلودگی خیلی کمتری دارند. شناخته‌شده-ترین سوخت جلبکی بیواتانول و بیودیزل می‌باشد که می‌تواند جایگزین دیزل نفتی شود. بیودیزل با عنوان کربن خنثی شناخته می-شود زیرا میزان انتشار کربن‌دی‌اکسیدی را به شدت کاهش می‌دهد. بهینه سازی شرایط کشت جلبکی، روش‌های برداشت و فراوری توده جلبکی، به بیشترین میزان ماده اولیه سوختهای زیستی( لیپید یا قند) می‌انجامد. روغن استخراجی به عنوان سوخت مایع مورد استفاده قرار می‌گیرد و باقی مانده زیتوده جلبکی توسط هضم بی‌هوازی به بیوگاز یا بیواتانول تبدیل می‌شود و باقیمانده آن به عنوان کود و یا تغذیه حیوانات مورد استفاده قرار می‌گیرد. در این بررسی، انواع روشهای کشت جلبک و تولید سوختهای زیستی استفاده شده در سالهای اخیر مورد ارزیابی قرار می‌گیرند

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Biofuel production potentiel from marine algae

نویسندگان [English]

  • khanomnaz ebadi 1
  • ahmad shadi 2
1 persian gulf univercity
2 persian gulf univercity
چکیده [English]

Abstract
Fossil fuels are the main sources of energy consumption, however, they raised concerns over their decreasing supply and heavy environmental impacts such as air pollution, greenhouse gases production, and global warming. Biofuels are renewable energy sources which produce much lower contamination and might be appropriate alternatives for fossil fuels. In this regard, micro-algal based fuels are important due to their high growth rate. They can be cultivated in arid areas, and utilize saltwater in small amounts. In addition, microalgae have higher carbon dioxide fixation rates in contrast to the terrestrial plants. Biodiesel and bioethanol are the most common algal biofuels which are appropriate alternatives to traditional diesel oil. Biodiesels are known as "neutral carbon" because their carbon dioxide emission to the air is significantly low. Optimizing the algal cultivation factors, in addition to improvements in harvesting and processing methods will result in a maximum yield of biofuel primary compounds such as lipids and sugars. The extracted oil from algae is used directly as a liquid fuel, and the remaining biomass is converted into bioethanol and biogas by anaerobic digestion/fermentation or used as fertilizer or animal feed. This review analyses different methods used for algal culture and biofuel production in recent years.

کلیدواژه‌ها [English]

  • Key words: Biofuels
  • micro-algae
  • Biodiesel
  • Bioethanol
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