Biodiesel production with microalgae as feedstock: from strains to biodiesel. Biotechnol Lett
Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, People's Republic of China.Biotechnology Letters (Impact Factor: 1.59). 03/2011; 33(7):1269-84. DOI: 10.1007/s10529-011-0574-z
Due to negative environmental influence and limited availability, petroleum-derived fuels need to be replaced by renewable biofuels. Biodiesel has attracted intensive attention as an important biofuel. Microalgae have numerous advantages for biodiesel production over many terrestrial plants. There are a series of consecutive processes for biodiesel production with microalgae as feedstock, including selection of adequate microalgal strains, mass culture, cell harvesting, oil extraction and transesterification. To reduce the overall production cost, technology development and process optimization are necessary. Genetic engineering also plays an important role in manipulating lipid biosynthesis in microalgae. Many approaches, such as sequestering carbon dioxide from industrial plants for the carbon source, using wastewater for the nutrient supply, and maximizing the values of by-products, have shown a potential for cost reduction. This review provides a brief overview of the process of biodiesel production with microalgae as feedstock. The methods associated with this process (e.g. lipid determination, mass culture, oil extraction) are also compared and discussed.
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- "Microalgae could contribute to greenhouse gases (GHG) mitigation and convert carbon into lipids through photosynthesis . Many microalgae species are suitable for biodiesel production because they accumulate large amounts of triacylglycerides (TAGs) (Gong and Jiang, 2011; Scott et al., 2010). Although, the use of microalgae as a source of biofuel is not a novel concept, microalgae have received increasing attention because of their many advantages (Craggs et al., 2012; Wang et al., 2010) and have been progressively used in several regions, particularly in the United States and Europe (Lardon et al., 2009; Yang et al., 2011). "
ABSTRACT: Scenedesmus quadricauda, a local freshwater microalga, was used to treat primary settled and filtrate wastewater and to produce algal lipid. For the primary settled wastewater, the maximum biomass concentrations of acclimated and unacclimated microalgae were 0.995 g/ L and 0.940 g/L, respectively. Over 90% orthophosphate and 95% ammonia nitrogen in the acclimated and unacclimated cultures, respectively, were removed after five days. The lipid contents of the microalgae were higher than 13% in all cultures. The highest growth rate occurred in the 25% filtrate culture. Over 80% phosphate was removed under the 25% and 50% filtrate cultures within six days, while over 90% ammonia nitrogen was removed within five days under both conditions. The lipid content was the highest (18.1%) under the 50% filtrate condition. C16:0, C18:2n6, and C18:3n3 were dominant fatty acids. In conclusion, S. quadricauda is a viable candidate for wastewater treatment and lipid production.Water Environment Research 01/2015; · 0.87 Impact Factor
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- "The results showed that polar lipid and TAG were main composition in the total lipid of the 9 Nannochloropsis, while other component contents, including sterol esters (SE), fatty acid methyl ester (FAME), free sterol (FS) and diacylglycerol (DAG) were lower than both TAG and polar lipid content (Table 2). In the all lipid component contents, only TAGs are easily transesterified into biodiesel by traditional methods (Gong and Jiang, 2011). Therefore, TAG content in the total lipid could significantly influence production efficiency of microalgal biodiesel. "
ABSTRACT: Nannochloropsis have attracted sustained interest from algal biodiesel researchers due to their high biomass accumulation rate and high lipid content. There are six recognized species in the Nannochloropsis genus that are phylogenetically divided into Nannochloropsis gaditana, Nannochloropsis salina, Nannochloropsis granulata, Nannochloropsis limnetica, Nannochloropsis oceanica and Nannochloropsis oculata. In this study, the potential of 9 Nannochloropsis species from the 6 genus for biodiesel production was evaluated by determining their growth rate, biomass accumulation, lipid productivity, lipid composition, fatty acid profiles and biodiesel properties. The results showed that the best strain was N. oceanica IMET1, with lipid productivity of 158.76±13.83mgL(-1)day(-1), TAG production of 1.67±0.20g/L, favorable fatty acid profiles of C16-C18 (56.62±1.96%) as well as suitable biodiesel properties of higher cetane number (54.61±0.25), lower iodine number (104.85±2.80gI2/100g) and relative low cloud point (3.45±0.50°C). N. oceanica IMET1 could be consider as valuable feedstock for microalgal biodiesel production.Bioresource Technology 06/2014; 167C:503-509. DOI:10.1016/j.biortech.2014.06.047 · 4.49 Impact Factor
Agrociencia 05/2014; 48(3):271-284. · 0.26 Impact Factor
- "The lipid content of Scenedesmus sp. ranges 20 to 21 % (Gong and Jiang, 2011) and 19.6 to 21.1 % (Rodolfi et al., 2009), in laboratory cultures and under controlled conditions. These results were SACRISTÁN-DE ALVA et al. al. (2011) usaron microalgas cultivadas en agua residual artificial y el contenido de lípidos fue 12.8 %, similar al del presente estudio para ART, pero bastante menor que lo encontrado para ARC (Cuadro 3). "
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