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

Abstract 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].

[1]  T. Tonon,et al.  Long chain polyunsaturated fatty acid production and partitioning to triacylglycerols in four microalgae. , 2002, Phytochemistry.

[2]  Marco Alberti,et al.  Comparative LCA of Three Alternative Technologies for Lipid Extraction in Biodiesel from Microalgae Production , 2017 .

[3]  N. Bernet,et al.  Experimental study on a coupled process of production and anaerobic digestion of Chlorella vulgaris. , 2011, Bioresource technology.

[4]  Jun Cheng,et al.  Improving growth rate of microalgae in a 1191m(2) raceway pond to fix CO2 from flue gas in a coal-fired power plant. , 2015, Bioresource technology.

[5]  J. Hazebroek,et al.  Triacylglycerol composition and structure in genetically modified sunflower and soybean oils , 1997 .

[6]  Lingmei Dai,et al.  A novel process on lipid extraction from microalgae for biodiesel production , 2016 .

[7]  Thomas H. Bradley,et al.  Net energy and greenhouse gas emission evaluation of biodiesel derived from microalgae. , 2010, Environmental science & technology.

[8]  Yongchen Song,et al.  Dual-film optofluidic microreactor with enhanced light-harvesting for photocatalytic applications , 2018 .

[9]  Morgan Fröling,et al.  Life cycle assessment of hydrotreated vegetable oil from rape, oil palm and Jatropha , 2011 .

[10]  Amanda Lea-Langton,et al.  Nutrient recycling of aqueous phase for microalgae cultivation from the hydrothermal liquefaction process , 2012 .

[11]  Marie-Odile P. Fortier,et al.  Life cycle assessment of bio-jet fuel from hydrothermal liquefaction of microalgae , 2014 .

[12]  D W Pennington,et al.  Life cycle assessment: Part 1: Framework, goal and scope definition, inventory analysis, and applications , 2004 .

[13]  I. Ferrer,et al.  Influence of hydrothermal pretreatment on microalgal biomass anaerobic digestion and bioenergy production. , 2015, Water research.

[14]  Enrica Uggetti,et al.  Pretreatment of microalgae to improve biogas production: a review. , 2014, Bioresource technology.

[15]  Wei-Nong Zhang,et al.  A new process for preparation of soybean protein concentrate with hexane-aqueous ethanol mixed solvents. , 2005, Journal of AOAC International.

[16]  V. Strezov,et al.  Life cycle assessment of a microalgae biomass cultivation, bio-oil extraction and pyrolysis processing regime , 2013 .

[17]  H. von Blottnitz,et al.  A life-cycle comparison between inorganic and biological catalysis for the production of biodiesel , 2008 .

[18]  Q. Liao,et al.  Bamboo charcoal as a cost-effective catalyst for an air-cathode of microbial fuel cells , 2017 .

[19]  Jason C. Quinn,et al.  Techno-economic and life-cycle assessment of an attached growth algal biorefinery. , 2016, Bioresource technology.

[20]  Céline Hognon,et al.  Energetic and economic evaluation of Chlamydomonas reinhardtii hydrothermal liquefaction and pyrolysis through thermochemical models. , 2015 .

[21]  E. Frank,et al.  Life cycle comparison of hydrothermal liquefaction and lipid extraction pathways to renewable diesel from algae , 2012, Mitigation and Adaptation Strategies for Global Change.

[22]  A. Marchese,et al.  Development and Validation of a Reduced Chemical Kinetic Mechanism for Computational Fluid Dynamics Simulations of Natural Gas/Diesel Dual-Fuel Engines , 2016 .

[23]  Stephanie L. Shaw,et al.  Life-cycle and techno-economic analysis of utility-connected algae systems , 2013 .

[24]  Improvement of microalgae lipid productivity and quality in an ion-exchange-membrane photobioreactor using real municipal wastewater , 2017 .

[25]  Shengjun Luo,et al.  Biomass and lipid production of marine microalgae using municipal wastewater and high concentration of CO2 , 2011 .

[26]  Xiaowei Liu,et al.  Pilot-scale data provide enhanced estimates of the life cycle energy and emissions profile of algae biofuels produced via hydrothermal liquefaction. , 2013, Bioresource technology.

[27]  Ao Xia,et al.  Innovation in biological production and upgrading of methane and hydrogen for use as gaseous transport biofuel. , 2016, Biotechnology advances.

[28]  Cristina González-Fernández,et al.  Enhancing methane production of Chlorella vulgaris via thermochemical pretreatments. , 2013, Bioresource technology.

[29]  Keat-Teong Lee,et al.  Microalgae biofuels: A critical review of issues, problems and the way forward. , 2012, Biotechnology advances.

[30]  Cristina González-Fernández,et al.  Effect of high pressure thermal pretreatment on Chlorella vulgaris biomass: Organic matter solubilisation and biochemical methane potential , 2014 .

[31]  Yun Huang,et al.  An annular photobioreactor with ion-exchange-membrane for non-touch microalgae cultivation with wastewater. , 2016, Bioresource technology.

[32]  Jason C. Quinn,et al.  Lifecycle assessment of microalgae to biofuel: Comparison of thermochemical processing pathways , 2015 .

[33]  G. Heath,et al.  Life-Cycle Assessment of the Use of Jatropha Biodiesel in Indian Locomotives (Revised) , 2009 .

[34]  J L Valverde,et al.  Pyrolysis, combustion and gasification characteristics of Nannochloropsis gaditana microalgae. , 2013, Bioresource technology.

[35]  Arnaud Hélias,et al.  Life-cycle assessment of biodiesel production from microalgae. , 2009, Environmental science & technology.

[36]  J. A. Campo,et al.  Outdoor cultivation of microalgae for carotenoid production: current state and perspectives , 2007, Applied Microbiology and Biotechnology.

[37]  Hariklia N Gavala,et al.  Improving anaerobic sewage sludge digestion by implementation of a hyper-thermophilic prehydrolysis step. , 2008, Journal of environmental management.

[38]  Marco Alberti,et al.  Evaluating microalgae‐to‐energy ‐systems: different approaches to life cycle assessment (LCA) studies , 2016 .

[39]  L. Lardon,et al.  Life-cycle assessment of microalgae culture coupled to biogas production. , 2011, Bioresource technology.

[40]  Amy E. Landis,et al.  Re-envisioning the renewable fuel standard to minimize unintended consequences: A comparison of microalgal diesel with other biodiesels , 2013 .

[41]  Brajendra K Sharma,et al.  Thermochemical conversion of raw and defatted algal biomass via hydrothermal liquefaction and slow pyrolysis. , 2012, Bioresource technology.

[42]  Sascha R.A. Kersten,et al.  Microalgae growth on the aqueous phase from Hydrothermal Liquefaction of the same microalgae , 2013 .

[43]  Kullapa Soratana,et al.  Effects of co-products on the life-cycle impacts of microalgal biodiesel. , 2014, Bioresource technology.

[44]  Zhixin Yu,et al.  Life-cycle assessment of energy consumption and environmental impact of an integrated food waste-based biogas plant , 2015 .

[45]  I. Ferrer,et al.  Comparing pretreatment methods for improving microalgae anaerobic digestion: Thermal, hydrothermal, microwave and ultrasound , 2015 .

[46]  A. Gandhi,et al.  Studies on alternative solvents for the extraction of oil-I soybean , 2003 .

[47]  Yun Huang,et al.  A novel self-adaptive microalgae photobioreactor using anion exchange membranes for continuous supply of nutrients. , 2016, Bioresource technology.

[48]  E. Frank,et al.  Energy use and greenhouse gas emissions from an algae fractionation process for producing renewable diesel , 2016 .

[49]  Jinyue Yan,et al.  Life Cycle Assessment of Algae Biofuels: Needs and challenges , 2015 .

[50]  M. Huntley,et al.  CO2 Mitigation and Renewable Oil from Photosynthetic Microbes: A New Appraisal , 2007 .

[51]  A. Visel,et al.  Lineage-specific chromatin signatures reveal a regulator of lipid metabolism in microalgae , 2015, Nature Plants.

[52]  Vishal Sethi,et al.  Life cycle greenhouse gas analysis of biojet fuels with a technical investigation into their impact on jet engine performance , 2015 .

[53]  W. Mabee,et al.  Wastewater and waste CO2 for sustainable biofuels from microalgae , 2018 .

[54]  Yao Huang,et al.  Biomass and biofuels in China: Toward bioenergy resource potentials and their impacts on the environment , 2018 .

[55]  Jeroen B. Guinee,et al.  Handbook on life cycle assessment operational guide to the ISO standards , 2002 .

[56]  C. Benning,et al.  Stress-induced neutral lipid biosynthesis in microalgae - Molecular, cellular and physiological insights. , 2016, Biochimica et biophysica acta.

[57]  René H Wijffels,et al.  The impact of nitrogen starvation on the dynamics of triacylglycerol accumulation in nine microalgae strains. , 2012, Bioresource technology.

[58]  Arnaud Hélias,et al.  Recommendations for Life Cycle Assessment of algal fuels , 2015 .

[59]  Guiping Hu,et al.  Life cycle assessment of the production of hydrogen and transportation fuels from corn stover via fast pyrolysis , 2013 .

[60]  Jae-Hoon Hwang,et al.  Photoheterotrophic microalgal hydrogen production using acetate- and butyrate-rich wastewater effluent , 2014 .

[61]  Mark A. White,et al.  Environmental life cycle comparison of algae to other bioenergy feedstocks. , 2010, Environmental science & technology.

[62]  Man Kee Lam,et al.  Homogeneous, heterogeneous and enzymatic catalysis for transesterification of high free fatty acid oil (waste cooking oil) to biodiesel: a review. , 2010, Biotechnology advances.

[63]  K. L Kadam,et al.  Environmental implications of power generation via coal-microalgae cofiring , 2002 .