Life-cycle assessment of biofuel production from microalgae via various bioenergy conversion systems

被引：112

作者：

Sun, Chi-He ^{[1
,2
]}

Fu, Qian ^{[1
,2
]}

Liao, Qiang ^{[1
,2
]}

Xia, Ao ^{[1
,2
]}

Huang, Yun ^{[1
,2
]}

Zhu, Xun ^{[1
,2
]}

Reungsang, Alissara ^{[3
,4
]}

Chang, Hai-Xing ^{[1
,2
]}

机构：

[1] Chongqing Univ, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Inst Engn Thermophys, Chongqing 400044, Peoples R China

[3] Khon Kaen Univ, Fac Technol, Dept Biotechnol, Khon Kaen 40002, Thailand

[4] Khon Kaen Univ, Res Grp Dev Microbial Hydrogen Prod Proc Biomass, Khon Kaen 40002, Thailand

来源：

ENERGY | 2019年 / 171卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

Life-cycle assessment; Microalgae bioenergy; Energy consumption; Net energy ratio; Environmental impact; Greenhouse gas emission; ION-EXCHANGE-MEMBRANE; HYDROTHERMAL LIQUEFACTION; LIPID EXTRACTION; WASTE-WATER; CHLORELLA-VULGARIS; BIOMASS; BIODIESEL; ENERGY; ALGAE; CULTIVATION;

D O I：

10.1016/j.energy.2019.01.074

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Microalgae is an alternative feedstock for biofuel production and has been considered to be a potential biotechnology. However, the systems for industrial biofuel production from microalgae are still costly and unsuitable. In addition, the complex and changeable processes contained in different bioenergy conversion systems make it difficult to reasonably compare these systems. This study aim to obtain an optimal microalgae-based industrial system using life-cycle assessment, and to unify the uncertainties caused by the discrepancies of each process. Two types of bioenergy conversion systems were modelled and compared: (1) transesterification, hydrothermal liquefaction, and pyrolysis for renewable diesel production and (2) anaerobic digestion without/with hydrothermal pretreatment for biogas production. The life-cycle impacts of these systems were quantified in terms of net energy ratios (NERs) and greenhouse gas (GHG) emissions. The results show that anaerobic digestion system with hydrothermal pretreatment is more industrially feasible and eco-friendly at the industrial scale due to its low NER (0.71) and GHG emissions [-60.84 g CO2-eq (MJ biogas)(-1)]. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：1033 / 1045

页数：13

共 64 条

[41] Effect of high pressure thermal pretreatment on Chlorella vulgaris biomass: Organic matter solubilisation and biochemical methane potential [J].