WIT Press

Effects Of Operational Conditions On Dry Distillation Characteristics Of Organic Solid Wastes


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A Sano, Y Bando & M Nakamura


Wood chip, cotton and dogfood were used as the sample of organic solid wastes. The change in weight of sample with the temperature in nitrogen atmosphere was investigated by using a thermogravimetry. The elements in solid residue and the components in effluent gas were analyzed by using a CHN analyzer and a gas chromatography, respectively. In all samples, the weight decreases drastically in the range of 500 to 700 K and CH4 is mainly produced at the temperature of 600 –1100 K. Two experiments on dye adsorption and wastewater treatment by activated sludge method were carried out as applications of the solid residue. The solid residue obtained under a certain condition showed higher performance of adsorption. The addition of solid residue enhanced the performance of waste water treatment. 1 Introduction Organic solid wastes in Japan are mainly treated by incineration. However, the environmental load in incineration is so high that recently dry distillation has been employed as the treatment of organic solid waste. By the dry distillation, organic solid wastes are transformed to gas, tar and solid residue. The gas and solid residue are used as fuel and activated coke, respectively. Although the tar is a little troublesome, the environmental load is rather low [1-51. The dry distillation at high temperature becomes popular for the municipal solid wastes. However, for the industrial organic solid wastes such as wood, clothes and food which are qualitatively homogeneous, the dry distillation at low temperature is considered to be proper. The dry distillation at low temperature has advantages of easy operation and low cost. In this study, three different samples were used and the effects of operational conditions on the dry