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    • 7. 发明申请
    • TREATMENT METHOD FOR WASTE WATER SLUDGE COMPRISING AT LEAST ONE METAL
    • 一种包含至少一种金属的废水污泥处理方法
    • WO1995006004A1
    • 1995-03-02
    • PCT/FI1994000376
    • 1994-08-26
    • KEMIRA OYSTENDAHL, KjellJOKINEN, Simo
    • KEMIRA OY
    • C02F01/26
    • C02F9/00C02F1/26C02F11/004C02F2101/105C02F2101/20C02F2209/06C02F2301/08Y02W10/40Y10S210/912
    • A method for treating waste water sludge comprising at least one metal originating from a waste water treatment coagulant, and phosphorus and heavy metals in order to recover said at least one metal and phosphorus and to discharge said heavy metals, said method comprising: acidifying said waste water sludge to dissolve metals contained in the sludge; subjecting the acidified waste water sludge to liquid-liquid extraction for recovering at least a portion of said at least one metal; treating the raffinate of the extraction in a first precipitation stage with appropriate chemicals for precipitating heavy metals, and thereafter discharging the precipitate thereby leaving a solution having a decreased content of heavy metals; and treating the solution having a decreased content of heavy metals in a second precipitation stage with appropriate chemicals for precipitating phosphorus and thereafter recovering the precipitated phosphorus.
    • 一种处理废水污泥的方法,包括至少一种源自废水处理凝结剂的金属,以及磷和重金属,以回收所述至少一种金属和磷并排出所述重金属,所述方法包括:将所述废物酸化 水泥污泥中溶解金属; 使酸化的废水污泥经过液 - 液萃取以回收所述至少一种金属的至少一部分; 在第一沉淀阶段用适当的沉淀重金属的化学品处理萃取液的萃余液,然后排出沉淀物,从而留下重金属含量降低的溶液; 并在第二沉淀阶段用合适的沉淀磷化学品处理重金属含量降低的溶液,然后回收沉淀的磷。
    • 9. 发明申请
    • METHOD FOR RECOVERING AT LEAST ONE METAL FROM AN ACIDIFIED WASTE WATER SLUDGE
    • 从一种酸化的废水污泥中回收至少一种金属的方法
    • WO1995006005A1
    • 1995-03-02
    • PCT/FI1994000377
    • 1994-08-26
    • KEMIRA OYOINAS, PekkaJOKINEN, Simo
    • KEMIRA OY
    • C02F01/26
    • C02F1/26C02F1/722
    • A method for recovering at least one metal from an acidified waste water sludge by liquid-liquid extraction, said method comprising: providing an acidified waste water sludge comprising ions of at least one metal and organic material, treating said acidified waste water sludge with an oxidizer to convert the organic material into a form that does not have an unfavourable effect on a subsequent liquid-liquid extraction, and subjecting said treated, acidified waste water sludge to a liquid-liquid extraction thereby obtaining an organic phase loaded with ions of said at least one metal, and subsequently recovering ions of said at least one metal from said organic phase.
    • 一种通过液 - 液萃取从酸化废水污泥中回收至少一种金属的方法,所述方法包括:提供含有至少一种金属和有机材料的离子的酸化废水污泥,用氧化剂处理所述酸化废水污泥 将有机材料转化为对随后的液 - 液萃取不具有不利影响的形式,以及将所述经处理的酸化废水污泥进行液 - 液萃取,由此获得负载所述至少一种离子的有机相 一种金属,随后从所述有机相中回收所述至少一种金属的离子。