B - Operations – Transporting – 09 – C
Patent
B - Operations, Transporting
09
C
B09C 1/10 (2006.01) C12P 1/00 (2006.01)
Patent
CA 2179660
The bioremediation of hydrocarbon contaminated soil is enhanced by applying to the soil a hydrocarbon solution of a surfactant selected from the group consisting of: (a) mixture of a sorbitan ester of a C7 to C22 monocarboxylic acid and a polyoxyalkylene adduct of a sorbitan monoester of a C7 to C22 monocarboxylic acid, the adduct having from 6 to 50 polyoxyalkylene units, (b) an alkyl glycoside wherein the alkyl group has from about 8 to about 18 carbon atoms and the glycoside is a mono or diglycoside or mixtures thereof and (c) a mixture of (a) and (b); and thereafter applying microbial nutrients to the soil in amounts sufficient to promote the growth of indigenous microorganisms.
On améliore la biorestauration d'un sol contaminé par des hydrocarbures en appliquant sur ce sol une solution hydrocarbure comprenant un tensioactif sélectionné dans le groupe formé par: (a) un mélange d'un ester de sorbitane d'un acide monocarboxylique C¿7? à C¿22? et d'un produit d'addition polyoxyalkylène d'un monoester de sorbitane d'un acide monocarboxylique C¿7? à C¿22?, ledit produit d'addition comprenant entre 6 et 50 unités polyxyalkylène, (b) un glycoside d'alkyle dans lequel le groupe alkyle comprend environ 8 à environ 18 atomes de carbone et le glycoside est un monoglycoside ou un diglycoside ou des mélanges de ces derniers, et (c) un mélange de (a) et (b); puis en appliquant sur le sol des substances nutritives microbiennes dans des quantités suffisantes pour activer la croissance des microorganismes indigènes.
Bock Jan
Robbins Max L.
Varadaraj Ramesh
Borden Ladner Gervais Llp
Exxon Research & Engineering Company
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