A preliminary study on the enrichment of indigenous ureolytic and nitrifying bacteria in beach sand: implication for coastal erosion control
A preliminary study on the enrichment of indigenous ureolytic and nitrifying bacteria in beach sand: implication for coastal erosion control
Ureolytic induced calcite precipitation (UICP) as an emerging method to mitigate coastal erosion has been studied recently. While exogenous ureolytic bacteria have been used widely for UICP, they may not be compatible with local environment and ecosystem. In this study, indigenous bio-stimulation was used to enrich native ureolytic bacteria from beach sand to achieve UICP. YE (yeast extract) and YEU medium (yeast extract with urea) were used as enriching media in this study. The solution enrichment tests were conducted up to 72 hours. The pH value, ammonium concentration, ureolytic activity, and viable bacterial colony number were measured to determine the enrichment effectiveness. This study also performed a preliminary investigation of ammonium treatment, a by-product of ureolytic UICP, by native nitrifying bacteria in beach sand. The findings suggested that both indigenous ureolytic and nitrifying bacteria were stimulated with appropriate enrichment media.
Y. Wang; X. Han; Y. Zhang; N. Jiang
9th International Congress on Environmental Geotechnics (ICEG2023)
Biogeotechnics and Bioremediation
https://doi.org/10.53243/ICEG2023-107
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