Anaerobic digestion of lipid-extracted Auxenochlorella protothecoides biomass for methane generation and nutrient recovery

被引：54

作者：

Bohutskyi, Pavlo ^{[1
]}

Ketter, Ben ^{[2
]}

Chow, Steven ^{[1
]}

Adams, Kameron J. ^{[1
]}

Betenbaugh, Michael J. ^{[2
]}

Allnutt, F. C. Thomas ^{[3
]}

Bouwer, Edward J. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Geog & Environm Engn, Baltimore, MD 21218 USA

[2] Johns Hopkins Univ, Dept Chem & Biomol Engn, Baltimore, MD 21218 USA

[3] Phycal Inc, Highland Hts, OH 44143 USA

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 183卷

关键词：

Integrated biodiesel and methane production; Inhibition by solvent residues; Nitrogen and phosphorus recycling; Trace element recovery; Process sustainability; PHOTOSYNTHETIC ELECTRON-TRANSPORT; CELL-WALL; MICROALGAE; ALGAE; BIODIESEL; BIOFUELS; SPECIATION; CHLORELLA; TOXICITY; BACTERIA;

D O I：

10.1016/j.biortech.2015.02.012

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study evaluated methane production and nutrient recovery from industrially produced, lipid extracted algal biomass (LEA) of Auxenochlorella protothecoides using semi-continuous anaerobic digestion (AD) at different organic loading rates (OLRs) and hydraulic retention times (HRTs). It was shown, that AD can improve biofuel production efficiency and sustainability, especially for scaled processes, through up to 30% increase in energy generation (up to 0.25 L of methane per g of LEA volatile solids) and partial nutrient recovery and recycling. The nutrient recycling with the AD effluent may reduce the cost of the supplied fertilizers by up to 45%. However, methane production was limited to nearly 50% of theoretical maxima potentially due to biomass recalcitrance and inhibition effects from the residual solvent in the LEA. Therefore, further AD optimization is required to maximize methane yield and nutrient recovery as well as investigation and elimination of inhibition from solvent residues. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：229 / 239

页数：11

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