Artículo
Whey as an alternative nutrient medium for growth of sporosarcina pasteurii and its effect on CaCO3 polymorphism and fly ash bioconsolidation
Chaparro, Sandra; Rojas, Hugo A.; Caicedo, Gerardo; Romanelli, Gustavo Pablo
; Pineda Ramos, Pedro Antonio; Luque, Rafael; Martínez, José J.
Fecha de publicación:
11/05/2021
Editorial:
MDPI AG
Revista:
Materials
ISSN:
1996-1944
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Whey in large quantities can cause environmental problems when discarded, because it reduces dissolved oxygen and aquatic life. Nonetheless, it could be used as an easily available and economical alternative to reduce culture medium costs in microbially induced calcium carbonate precipitation (MICP). In this work, a native Sporosarcina pasteurii was isolated and then cultured by using different proportions of whey (W) in nutrient broth (NB). The solids were characterized by XRD, FT-IR, TGA, and SEM. The potential applications in bioconsolidation were also studied. Whey concentration was directly related to CaCO3 production. Higher whey concentrations reduced calcium carbonate purity to nearly 80%. All experiments showed calcite and vaterite fractions, where a whey increment in the media increased calcite content and decreased vaterite content, causing a decrease in crystal size. MICP improved compressive strength (CS) in sand and fly ash. The best CS results were obtained by fly ash treated with 25 W-75 NB (37.2 kPa) and sand with 75 W-25 NB (32.1 kPa). Whey changed crystal polymorphism in biogenic CaCO3 production. Material bioconsolidation depends on the CaCO3 polymorph, thus fly ash was effectively bioconsolidated by crystallization of vaterite and sand by crystallization of calcite.
Palabras clave:
BIOGENIC CACO3
,
POLYMORPHISM
,
UREOLYTIC BACTERIA
,
WHEY
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Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Chaparro, Sandra; Rojas, Hugo A.; Caicedo, Gerardo; Romanelli, Gustavo Pablo; Pineda Ramos, Pedro Antonio; et al.; Whey as an alternative nutrient medium for growth of sporosarcina pasteurii and its effect on CaCO3 polymorphism and fly ash bioconsolidation; MDPI AG; Materials; 14; 10; 11-5-2021; 1-12
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