IN SITU PRECIPITATION OF CALCIUM CARBONATE (CACO3) BY INDIGENOUS MICROORGANISMS TO IMPROVE MECHANICAL PROPERTIES OF A GEOMATERIAL

A method for increasing the concentration of calcium carbonate in a geomaterial that contains indigenous microorganisms capable of hydrolyzing urea to ammonia, which method includes enriching the geomaterial with a source of nutrients, adding urea to the geomaterial which is hydrolyzed to ammonia an...

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Bibliographische Detailangaben
Hauptverfasser:	WILLIAMS, BARBARA C, BURBANK, MALCOLM B, WEAVER, THOMAS J, CRAWFORD, RONALD L
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY COMPOUNDS THEREOF EMBANKMENTS ENZYMOLOGY EXCAVATIONS FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING INORGANIC CHEMISTRY METALLURGY MICROBIOLOGY MUTATION OR GENETIC ENGINEERING NON-METALLIC ELEMENTS SOIL SHIFTING SPIRITS UNDERGROUND OR UNDERWATER STRUCTURES VINEGAR WINE
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Beschreibung
Zusammenfassung:	A method for increasing the concentration of calcium carbonate in a geomaterial that contains indigenous microorganisms capable of hydrolyzing urea to ammonia, which method includes enriching the geomaterial with a source of nutrients, adding urea to the geomaterial which is hydrolyzed to ammonia and which raises the pH of the geomaterial, and adding a source of calcium ions to the geomaterial. Carbonate ions obtained by the hydrolysis of the urea combine with calcium ions to form calcium carbonate. L'invention porte sur un procédé d'augmentation de la concentration de carbonate de calcium dans un géomatériau qui contient des microorganismes indigènes capables d'hydrolyser de l'urée en ammoniac, lequel procédé comprend les opérations consistant à enrichir le géomatériau avec une source de nutriments, ajouter de l'urée au géomatériau qui est hydrolysé en ammoniac et qui élève le pH du géomatériau, et ajouter une source d'ions calcium au géomatériau. Des ions carbonate obtenus par l'hydrolyse de l'urée se combinent avec des ions calcium pour former un carbonate de calcium.