TAILIEUCHUNG - Environmental Impact of Biofuels Part 14

Tham khảo tài liệu 'environmental impact of biofuels part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 252 Environmental Impact of Biofuels also been identified as a high risk exposure area Madsen 2006 . The aim of this chapter is to identify factors influencing exposure to bioaerosols in straw storage halls and to reveal the impact on the exposure of different attempts to reduce exposure . sealing of a straw shredder. Empirical data showing the influence of opening outdoor gates while straw is unloaded are presented. Furthermore the impact of the quality of the biofuel handled in the straw reception on the human exposure is studied as well as the impact on the exposure of the water content of the handled straw. 2. Methods The biofuel plants The study included 18 biofuel plants situated all over Denmark. To make this study comparable with earlier publications of studies on the same plants the same names as used in these previous papers have been used. Thus 13 plants are called a number between 4 and 24 as in another study Madsen and Nielsen 2010 and five other plants are called plant A B C D and E also as in another study Madsen 2006 . The plants generated energy using straw or wood chips as the fuel. Airborne dust was sampled in working areas in combined straw receiving and storage halls which in the following are called straw storage halls. At plants A and E airborne dust was sampled in areas where work with wood chips was performed and at plants B c and D dust was sampled where work with straw was performed. At 11 of the plants straw was received on both days of sampling up to 36 trucks arrived per day with straw. On receipt the water content in the received straw was measured using a straw bale moisture probe by the people working at the plants. Results varied between and percentage by dry weight and averages at each plant and each day varied between and Madsen and Nielsen 2010 . During unloading of straw the gates in the straw storage halls were sometimes open allowing outdoor air in and sometimes they were closed. After unloading the

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