برداشت کارآمد میکرو جلبک
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برداشت کارآمد میکرو جلبک

عنوان فارسی مقاله: برداشت کارآمد میکرو جلبک به واسطه تعامل پلی ساکاریدها با کلسیم و فسفات باقیمانده در محیط رشد
عنوان انگلیسی مقاله: Efficient microalgae harvesting mediated by polysaccharides interaction with residual calcium and phosphate in the growth medium
مجله/کنفرانس: مجله تولید پاک – Journal of Cleaner Production
رشته های تحصیلی مرتبط: زیست، شیمی
گرایش های تحصیلی مرتبط: بیوشیمی
کلمات کلیدی فارسی: میکروجلبک، برداشت، لخته شدن خودکار، پلی ساکاریدها، کلسیم، فسفات
کلمات کلیدی انگلیسی: Microalgae، Harvesting، Auto-flocculation، PSAs، Calcium، Phosphate
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus – Master Journals List – JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.jclepro.2019.06.154
دانشگاه: Advanced Biomass R&D Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2019
ایمپکت فاکتور: 7.096 در سال 2018
شاخص H_index: 150 در سال 2019
شاخص SJR: 1.620 در سال 2018
شناسه ISSN: 0959-6526
شاخص Quartile (چارک): Q1 در سال 2018
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 7
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E12819
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست انگلیسی مطالب

Abstract


Graphical abstract


1. Introduction


2. Material and methods


3. Results


4. Discussion


5. Extensibility of PSAs-based auto-flocculation concept


6. Economic and environmental sustainability


7. Conclusions


Declaration of interest


Acknowledgments


Appendix A. Supplementary data


References

نمونه متن انگلیسی مقاله

Abstract


This study sets out to harvest microalgae through auto-flocculation by manipulating the interactive effect of calcium, phosphate, and polysaccharides (PSAs). The harvesting efficiency (H.E) of 91 ± ۲٫۷% was achieved for Ettlia sp. through auto-flocculation. The H.E was attributed to the chelation of calcium and PSAs present in microalgae medium. In the absence of PSAs, the H.E reduced to 64 ± ۰۵% only. The addition of phosphate (34 ± ۰٫۱۳ mg L۱ ) increased the H.E to 73 ± ۱٫۵%. Zeta-potential measurements showed that the harvesting was induced by charge neutralization and inter-particle bridging. The PSAsbased auto-flocculation was tested for Chlorella sp. too but it turned out the H.E of 51 ± ۱٫۳% only. The flocculation did not take place when the co-harvesting of Ettlia sp. and Chlorella sp. was carried out. It is concluded that each microalgae specie shows different auto-flocculation mechanism due to variation in their PSAs characteristics. It triggers up the need for setting up a distinct protocol for different microalgae species to assess their auto-flocculation potential.


Introduction


Harvesting or dewatering is a critical step of microalgae bioprocessing (Gejji and Fernando, 2018; Pradhan et al., 2019). Harvesting accounts for 20e30% of the total cost of microalgae bioprocessing (Sahoo et al., 2017a; Yoo et al., 2013). So far, various methods for microalgae harvesting including centrifugation, dissolved air flotation, and filtration have been developed; however, none of them is cost-effective yet (Sahoo et al., 2017b). To address this challenge, auto-flocculation has been recognized as an alternative method for microalgae harvest (Raheem et al., 2018). Autoflocculation is a cheap and efficient method (Lai et al., 2016; Mathimani et al., 2018; Wang et al., 2018). It demands less resource input than any other method of microalgae harvest (Ding et al., 2017; Jimenez et al., 2017 ). Auto-flocculation is based on the principle of the well-known chemical flocculation process; however, it does not involve the addition of expensive chemicals. Autoflocculation is mainly driven by the interaction of polysaccharides (PSAs), calcium, and phosphate (Tran et al., 2017; Ummalyma et al., 2017; Vandamme et al., 2012). PSAs are the form of polymeric carbohydrates, which are produced by microalgae under specific cultivation conditions. PSAs are composed of glucose, arabinose, galactose, xylose, mannose, and fructose. Each sugar group has a different role in cell metabolism. For example, arabinose controls cell aggregation properties, and galactose is responsible for providing energy. It is widely known that microalgae produce PSAs under light and nutrients stress condition. The yield and the characteristics of PSAs depend on the microalgal species (Lee et al., 2016; Vandamme et al., 2012).

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