公开(公告)号：US06855256B2

公开(公告)日：2005-02-15

申请号：US10060277

申请日：2002-02-01

申请人： Jean-Francois Blais ,  Nathalie Meunier ,  Jean-Louis Sasseville ,  Rajeshwar D. Tyagi ,  Guy Mercier ,  Fatima Hammy

发明人： Jean-Francois Blais ,  Nathalie Meunier ,  Jean-Louis Sasseville ,  Rajeshwar D. Tyagi ,  Guy Mercier ,  Fatima Hammy

IPC分类号： C12N1/20 ,  C02F1/52 ,  C02F1/66 ,  C02F1/72 ,  C02F1/78 ,  C02F3/34 ,  C02F9/00 ,  C02F11/00 ,  C02F11/06 ,  C02F11/14 ,  C02F3/00

CPC分类号： C02F3/345 ,  C02F1/52 ,  C02F1/66 ,  C02F1/72 ,  C02F1/722 ,  C02F1/78 ,  C02F9/00 ,  C02F11/004 ,  C02F2101/20 ,  C02F2303/04

摘要： The invention relates to a hybrid biological and chemical method for decontaminating sludge containing heavy metals and pathogenic microorganisms, consisting of the following steps: the sludge is mixed with an acidic leaching solution in order to acidify the sludge with a pH which is low enough to solubilize the majority of the heavy metals and to destroy most of the pathogenic microorganisms but which is also high enough to minimize the solubilization of fertilizing elements; oxidation-reduction of more than +400 mv is maintained, liquid-solid separation occurs in order to obtain a solid fraction comprising decontaminated acidic sludge and a liquid fraction comprising heavy metals which are dissolved in a leaching solution; the sludge is neutralized: and neturalized decontaminated sludge is recovered, whereby the fertilizing elements contained therein, i.e. carbon, nitrogen and phosphorus, remain substantially unchanged in relation to the initially contaminated sludge.

摘要翻译： 本发明涉及一种用于净化含有重金属和病原微生物的污泥的混合生物和化学方法，包括以下步骤：将污泥与酸性浸出溶液混合，以便将pH值低至足以溶解的污泥酸化 大多数重金属并破坏大多数病原微生物，但也足够高以使施肥元素溶解最小化; 维持大于+ 400mv的氧化还原，发生液固分离，以获得包含净化的酸性污泥的固体馏分和包含溶解在浸出溶液中的重金属的液体馏分; 污泥被中和，并且回收净化的去污污泥，由此其中所含的施肥元素即碳，氮和磷相对于最初被污染的污泥基本上保持不变。