C - Chemistry – Metallurgy – 12 – N
Patent
C - Chemistry, Metallurgy
12
N
C12N 1/20 (2006.01) B09B 3/00 (2006.01) B09C 1/10 (2006.01)
Patent
CA 2296658
A technique for accumulating and isolating a bacterium capable of degrading a hardly degradable organic chlorine-based pesticide PCNB by improving the existing soil percolation method, and the bacterium capable of efficiently degrading/processing PCNB. To soil containing the organic chlorine-based pesticide PCNB are added pieces of a porous material having a number of pores and being superior in the PCNB-adsorbability to the soil to form an accumulation soil layer (2). Next, an inorganic salt medium (3) utilizing PCNB alone as the carbon source and the nitrogen source is percolated through the soil layer (2) so that an aerobic bacterium Burkholderia cepacia is accumulated on the porous material pieces.
L'invention concerne un procédé relatif à l'accumulation et à l'isolation d'une bactérie capable d'induire, via une amélioration de la percolation existante du sol, la dégradation du pesticide PCNB, produit à base de composés organiques chlorés difficilement dégradable. L'invention concerne également la bactérie permettant d'assurer/de traiter le PCNB avec efficacité. On ajoute au sol renfermant ledit pesticide des éléments de matériau poreux présentant un certain nombre de pores et offrant une adsorbabilité supérieure vis-à-vis de ce pesticide, de manière à former une couche d'accumulation dans le sol (2). On engage ensuite la percolation, à travers la couche en question (2), d'un milieu à base de sel inorganique (3) en utilisant le seul PCNB comme source de carbone et d'azote, afin d'accumuler sur les éléments de matériau poreux une bactérie aérobie appelée Burkholderia cepacia.
Takagi Kazuhiro
Yoshioka Yuuichi
Forestry And Fisheries Of Japan Director General Of National Institute Of Agro-Environmental Sci
Marks & Clerk
National Institute For Agro-Environmental Sciences Independent A
Takagi Kazuhiro
Toyo Denka Kogyo Co. Ltd.
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