Measurement System of Air Permeability and Airflow Resistance in Soil Deodorizer

Soil deodorizer has been widely used in Japan since 1970’s. One of challenges on soil deodorizer is to reduce energy consumption of blower towards a low carbon society. Measurement system for air permeability was examined to real soil filter of the deodorizer. Air permeability of soil filter could be measured precisely by using soil sample of 60 mm in diameter and 150 mm in height with confined pressure. Darcy’s law for airflow in soil filter was true under the airflow rate of 50 cm3 s-1 in this test apparatus. To reduce airflow resistance, treatments of improving soil structure were tested. Effect of the repetitive process of water intake & drainage and air movement on reducing airflow resistance was clarified by measuring air permeability of soil filter.