Category Archives: Liquid Biofuels: Emergence, Development and

Ecological Footprint

Agriculture has brought about widespread environmental degradation, with this degradation intensifying as it became increasingly mechanized and reliant on man-made inputs. It is therefore important to bear in mind the potentially negative impacts that intensified farming practices will have on ecosystems in areas where organic material for biofuel production is being grown, often where less-intensive agricultural methods have previously been […]

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Harvesting Methods

The algal biomass production process requires one or more solid-liquid separation steps. Generally, first stage involves a separation of biomass from the bulk sus­pension (including flocculation, flotation, or gravity sedimentation). The second stage (thickening) raises the concentration of the slurry through techniques such as centrifugation, filtration, and ultrasonic aggregation; hence, it is generally a more energy intensive step than bulk […]

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Biofuels Sustainability of Ethanol and Biodiesel

The concept of sustainability is derived from ‘sustainable development,’ which has been defined in the Brundtland report as ‘development that meets the needs of the present generation without compromising the ability of future generations to meet their own needs’ (WCED 1987: 45). The concept of sustainable development has traditionally focused on three pillars (i. e., social, environmental, and economic), and […]

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Green Analytical Chemistry

Armenta et al. (2008) established the creation of the term green analytical chem­istry based on: (1) sample treatment; (2) oriented scanning methodologies; (3) alternatives to toxic reagents; (4) waste minimization; (5) recovery of reagents; (6) online decontamination of wastes; and (7) reagent-free methodologies. Thus, it should be considered that the analysis of biomass should be based on the 12 principles […]

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Environmental Issues in the Liquid Biofuels Industry

Michael B. Charles and Suman Sen Abstract Although biofuels have the potential to supplement conventional petroleum fuels in a variety of energy applications, and as transport fuels in particular, their use also poses some problems from an environmental perspective. Concerns exist relating to whether positive net energy (and therefore effective greenhouse gas mitigation) can be derived from biofuels, whether the […]

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Process Integration

A large number of individual processes are involved in the overall development of second-generation liquid biofuels via biochemical route. This leads to the possibil­ity of process integration that will lower the capital and operating cost and ensure that optimum production of high-value co-products is achieved. Although process integration has the benefit of cost reduction in most cases, it is not […]

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Author CV

Aldara is currently Associate Professor at Agribusiness Engineering Department at Fluminense Federal University and Coordinator of the Agribusiness Research Group (called Grupo de Analise de Sistemas Agroindustriais) in Volta Redonda’s Campus, Rio de Janeiro. Since 2007, she has been studying the competitive driv­ers of the biodiesel production chain and issues related to environmental and social sustainability in Brazil, especially on […]

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