Research on determination of air pollutant emission factors from rice husk burning in laboratory
Rice husk is the outer layer of rice grain and is separated during milling. Rice husk is not continuously generated but concentrates on rice harvests. Therefore, excess rice husk becomes a waste source to be treated. Currently, the common method for handling rice husk is still pile burning. This process produces dust and air pollutants that contribute to environmental pollution and impact on human health. To build emission factors of air pollutants from rice husk burning, simulative experiments of rice husk open burning has been carried out in the laboratory scale by using a burning tower system. During the experiments, the Testo 350-XL was used to measure CO2, CO, NO, NO2 and Sibata Model GT-331 was used to determine TSP. Based on the emission concentration, the emission factors of CO, CO2, NO2, SO2 and TSP were 113.84–120.66 g/kg, 908,715–936,562 g/kg; 0.0125–0.014 g/kg; 0.038–0.118 g/kg and 1,818–2,435 g/kg, respectively. These emission factors are the basis to compare the emission level between rice husk disposal by burning with other utilization methods to change rice husk into different energy. They are also used to make decisions to increase the rice husk using rate.
emission factors; laboratory; rice husk; air pollutants.
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