Energy Potential of Agri Residual Biomass in Southeast Asia with the Focus on Vietnam
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| 2. Materials and Methods
2.1. Secondary Data Analysis Two types of data sources were used in this study. The main sources of secondary data were available scientific articles, Vietnamese governmental reports, statistical year‐ books, overviews and data from FAO. Secondary data sources contributed to the descrip‐ tion and mapping of the current situation and possible energy applications of the studied residual biomass; it showed gaps in available information and served as input data for calculating the energy potential together with the results of the laboratory work. 2.2. Origin of Materials and Preparation of Analysis Samples Based on the secondary data analysis regarding the biomass availability, the top three kinds of residual biomass materials (namely rice husks, rice straw and sugarcane bagasse) were collected in Vietnam during the 2019 spring season. The rice husk is the agroindustrial residue characterized as the outermost layer of the paddy grain that is removed from the rice grains during the milling process [15,16]. Rice straw is described as an inedible fibrous plant material part left after the paddy rice har‐ vesting process [17]. Both materials, rice husks and rice straw were gathered in the rural district Giao Thủy, located in the Nam Định Province of the Red River Delta region. Sugarcane bagasse is the residue of processes leading to the extraction of sugarcane juice [18]. Sugarcane bagasse (from manual juice extraction) was collected on the local market of Bát Tràng village in Gia Lâm district of Hanoi. For better visualization, the detailed Vietnam provinces’ map is presented in Figure 2. Figure 2. Map of Vietnam divided into provinces [19], adjusted by authors. The representative material samples were obtained according to the standard sam‐ pling methodology BS EN ISO 18135:2017 [20]. For further laboratory testing, the analysis samples were prepared from the raw materials (not mixed with any other materials or additives) following the standard methodology of BS EN ISO 14780:2017 [21]. Laboratory tải về 1.15 Mb. Chia sẻ với bạn bè của bạn:
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