汚泥の焼結再資源化プロセスに関する研究(4) : 港湾浚渫汚泥/焼却灰/ガラス屑の混合焼結生成物の溶出特性

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Cooperative research has been carried out to utilize sludge from Tagonoura bay. This work describes the leaching properties of various kinds of sintered products which were made from two mixtures. Mixture(A) was composed of dredged-sludge and glass dust, and mixture(B) was composed of municipal incinerator ash and glass dust. The sintering temperature ranged from 900 to 1250℃. The main anions (Cl^-, SO_4^<2->) and cations (Na^+, Ca^<2+>) that were leached from the sintered products depended on the sintering temperature and the amount of glass dust. The leached amounts from incinerator ash only sintered products were to〜10^4mg/l and those from dredged-sludge only sintered products were to〜10^3mg/l in concentration. In the case of mixture(A), the leached amount decreased considerably with both sintering temperature and glass inclusion. Cl^- showed the same leached behavior as Na^+, while SO_4^<2-> did the same as Ca^<2+>, suggesting NaCl and CaSO_4 to be decomposed or stabilized in the mixture-sintering process. In the case of mixture(B), similarly, the leached amount decreased significantly, depending on both temperature and glass inclusion. Especially, serious synergistic effects of sintering temperature and glass addition were recognized : the decreasing rate of the leached amount reached to 10^<-3>. These results indicate that there could be significant savings in the running cost and the energy needed for sintering process.
東海大学の論文
1999-03-30

汚泥の焼結再資源化プロセスに関する研究(4) : 港湾浚渫汚泥/焼却灰/ガラス屑の混合焼結生成物の溶出特性

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