Study on the Classification of Industrial Wastes and their Disposal Sites

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Effluent from stable-type industrial solid waste disposal sites in Nagaoka and Ojiya was analyzed from July 1992 to November 1995 and from November 1994 and June 1995, respectively.Base on the above results, from a standpoint to reduce the volume of industrial wastes and to minimize adverse environmental effects, a new clasification of industrial wastes and their disposal sites was proposed as below.1. First, industrial solid wastes should be classified into "organic" and "inorganic".2. Next, hazardous substances, that is heavy metals and Total Organic Halogen (TOX), in the organic or the inorganic waste should be measured.3. If the inorganic waste is judged as non-hazardous in the 2nd step, it should be disposed of in a present stable-type disposal site. If hazardous, treatment for no elution should be carried out and the waste should be disposed of in a new-type and exclusive (hazardous inorganic) disposal site, which bottom are lined with rubber sheets and has an effluent treatment plant.4. If the organic waste is judged as non-hazardous in the 2nd step, it should be disposed of in a new type and exclusive (non-hazardous organic) disposal site which has devices to promote organic decomposition and to treat effluent. Or, the organic waste should be oxidized into inorganic and returned to the 2nd step. If the organic waste is hazardous, treatment for no elution should be done and it shoule be disposed of in a new-type and exclusive (hazardous organic) disposal site which has devices to promote organic decomposition and to treat wastewater, and which bottom are lined with rubber sheets. Or, the organic waste should be oxidized into inorganic and returned to the 2nd step.5. Wastes for which treatment for no elution cannot be adopted and/or which are so harmful should be disposed of in a present isolated-type disposal site.