東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Time-dependent Variation in Life Cyc...

Montazeri, Mahdokht.

FindBook

Google Book

Amazon

博客來

Time-dependent Variation in Life Cycle Assessment of Microalgal Biorefinery Co-products.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Time-dependent Variation in Life Cycle Assessment of Microalgal Biorefinery Co-products./
作者:	Montazeri, Mahdokht.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	61 p.
附註:	Source: Masters Abstracts International, Volume: 55-04.
Contained By:	Masters Abstracts International55-04(E).
標題:	Environmental engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10105413
ISBN:	9781339688848

Time-dependent Variation in Life Cycle Assessment of Microalgal Biorefinery Co-products.
Montazeri, Mahdokht.

Time-dependent Variation in Life Cycle Assessment of Microalgal Biorefinery Co-products. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 61 p.

Source: Masters Abstracts International, Volume: 55-04.

Thesis (M.S.)--Northeastern University, 2016.

Microalgae can serve as a highly productive biological feedstock for fuels and chemicals. The lipid fraction of algal seeds has been the primary target of research for biofuel production. However, numerous assessments have found that valorization of co-products is essential to achieve economic and environmental goals. The relative proportion of co-products depends on the biomolecular composition of algae at the time of harvesting. In the present study the productivity of lipid, starch, and protein fractions were shown through growth experiments to vary widely with species, feeding regime, and harvesting time. Four algae species were cultivated under nitrogen-replete and -deplete conditions and analyzed at regular harvesting intervals. Dynamic growth results were then used for life cycle assessment using the U.S. Department of Energy's GREET model to determine optimal growth scenarios that minimize life cycle greenhouse gas (GHG) emissions, eutrophication, and cumulative energy demand (CED), while aiming for an energy return on investment (EROI) greater than unity. Per kg of biodiesel produced, C. sorokiniana in N-replete conditions harvested at 12 days was most favorable for GHG emissions and CED, despite having a lipid content of <20%. N. oculata under the same conditions had the lowest life cycle eutrophication impacts, driven by efficient nutrient cycling and valorization of microalgal protein and anaerobic digester residue co-products. The results indicate that growth cycle times that maximize a single fraction do not necessarily result in the most favorable environmental performance on a life cycle basis, underscoring the importance of designing biorefinery systems that simultaneously optimize for lipid and non-lipid fractions.

ISBN: 9781339688848Subjects--Topical Terms:

548583
Environmental engineering.

Time-dependent Variation in Life Cycle Assessment of Microalgal Biorefinery Co-products.
LDR:02719nmm a2200313 4500 001 2154114
005 20180330130620.5
008 190424s2016 ||||||||||||||||| ||eng d
020 $a 9781339688848
035 $a (MiAaPQ)AAI10105413
035 $a (MiAaPQ)coe.neu:10701
035 $a AAI10105413
040 $a MiAaPQ $c MiAaPQ
100 1 $a Montazeri, Mahdokht. $3 3341836
245 1 0 $a Time-dependent Variation in Life Cycle Assessment of Microalgal Biorefinery Co-products.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 61 p.
500 $a Source: Masters Abstracts International, Volume: 55-04.
500 $a Adviser: Matthew J. Eckelman.
502 $a Thesis (M.S.)--Northeastern University, 2016.
520 $a Microalgae can serve as a highly productive biological feedstock for fuels and chemicals. The lipid fraction of algal seeds has been the primary target of research for biofuel production. However, numerous assessments have found that valorization of co-products is essential to achieve economic and environmental goals. The relative proportion of co-products depends on the biomolecular composition of algae at the time of harvesting. In the present study the productivity of lipid, starch, and protein fractions were shown through growth experiments to vary widely with species, feeding regime, and harvesting time. Four algae species were cultivated under nitrogen-replete and -deplete conditions and analyzed at regular harvesting intervals. Dynamic growth results were then used for life cycle assessment using the U.S. Department of Energy's GREET model to determine optimal growth scenarios that minimize life cycle greenhouse gas (GHG) emissions, eutrophication, and cumulative energy demand (CED), while aiming for an energy return on investment (EROI) greater than unity. Per kg of biodiesel produced, C. sorokiniana in N-replete conditions harvested at 12 days was most favorable for GHG emissions and CED, despite having a lipid content of <20%. N. oculata under the same conditions had the lowest life cycle eutrophication impacts, driven by efficient nutrient cycling and valorization of microalgal protein and anaerobic digester residue co-products. The results indicate that growth cycle times that maximize a single fraction do not necessarily result in the most favorable environmental performance on a life cycle basis, underscoring the importance of designing biorefinery systems that simultaneously optimize for lipid and non-lipid fractions.
590 $a School code: 0160.
650 4 $a Environmental engineering. $3 548583
650 4 $a Chemical engineering. $3 560457
650 4 $a Energy. $3 876794
690 $a 0775
690 $a 0542
690 $a 0791
710 2 $a Northeastern University. $b Civil and Environmental Engineering. $3 1035254
773 0 $t Masters Abstracts International $g 55-04(E).
790 $a 0160
791 $a M.S.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10105413