کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1742018 1521822 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of culture medium recycling on the performance of Arthrospira platensis cultures
ترجمه فارسی عنوان
تأثیر بازیافت محیط کشت بر عملکرد کشت آرتروسپیرا پلاتنسیس
کلمات کلیدی
استفاده مجدد از متوسط، پلی ساکارید، مواد ارگانیک، بهره وری برداشت، مهار رشد
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


• Recycling of medium is essential to reduce water footprint of microalgae production.
• Repeated recycling of culture medium results in declined growth rate of Arthrospira.
• The decline in growth rate is due to organic matter excreted in the culture medium.
• Incomplete harvesting with strainer during medium recycle lowers harvesting efficiency.
• Rhamnose-rich polysaccharides accumulate in medium and influence filterability.

To reduce the water footprint of microalgae biomass production, it is essential to recycle the culture medium. The influence of medium recycling on the performance of the cyanobacterium Arthrospira platensis, the most widely cultivated microalgae, was investigated. Arthrospira was harvested with a 20 μm mesh size microstrainer, which is the benchmark harvesting technology for Arthrospira production. Repeated recycling of the culture medium resulted in a decline in growth rate and the maximum quantum yield of photosynthesis (Fv/Fm) when compared to a control culture in fresh medium. This decline was accompanied by accumulation of organic matter in the culture medium (up to 104 mg C L− 1). This organic matter consists of 70% of sugars, mostly rhamnose-rich polysaccharides with uronic acids. Accumulation of polysaccharides resulted in a decrease in the filtration rate through the microstrainer used for harvesting. Part of the biomass escaped harvesting and was returned to the culture with the recycled medium. This resulted in a change in the Arthrospira population and reduction in the harvesting efficiency, but this change in population had no effect on the growth rate. The growth rate of Arthrospira in the recycled culture medium was primarily influenced by organic matter that accumulated in the medium.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Algal Research - Volume 10, July 2015, Pages 48–54
نویسندگان
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