| 摘要 |
PROBLEM TO BE SOLVED: To make all of heavy metals or carbonaceous compounds such as hazardous chemical substances contained in a substance to be treated such as only sludge be harmless by turning them to highly stabilized forms as products of sodium silicate by a certain contained and complex schedule. SOLUTION: A substance to be treated is led to a treating liquid obtained by mixing slaked lime, sodium silicate or sodium silicate-containing waste glass powder with water, so that calcium silicate produced by reaction of slaked lime and sodium silicate and silicates of heavy metals produced by reaction of sodium silicate and heavy metal ions contained in the substance to be treated are settled. Thereby calcium silicate adsorbs oil contents in the substance to be treated. Slaked lime is preferably produced by reacting quicklime powder and granule produced by heating calcium carbonate powder and granule with water. The substance to be treated includes oily sludge, liquid hazardous substances, solid hazardous substances and organic hazardous substances and the like. |
