Dairy manure pellets and palm oil mill effluent as alternative nutrient sources in cultivating Sporosarcina pasteurii for calcium carbonate bioprecipitation.

Autor: Omoregie AI; Department of Water and Environmental Engineering, School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.; School of Chemical Engineering and Science, Swinburne University of Technology Sarawak Campus, Sarawak, Malaysia., Muda K; Department of Water and Environmental Engineering, School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor, Malaysia., Ngu LH; School of Chemical Engineering and Science, Swinburne University of Technology Sarawak Campus, Sarawak, Malaysia.
Jazyk: angličtina
Zdroj: Letters in applied microbiology [Lett Appl Microbiol] 2022 May; Vol. 74 (5), pp. 671-683. Date of Electronic Publication: 2022 Jan 25.
DOI: 10.1111/lam.13652
Abstrakt: Microbially induced carbonate precipitation (MICP) is a process that hydrolysis urea by microbial urease to fill the pore spaces of soil with induced calcium carbonate (CaCO 3 ) precipitates, which eventually results in improved or solidified soil. This research explored the possibility of using dairy manure pellets (DMP) and palm oil mill effluent (POME) as alternative nutrient sources for Sporosarcina pasteurii cultivation and CaCO 3 bioprecipitation. Different concentrations (20-80 g l -1 ) of DMP and POME were used to propagate the cells of S. pasteurii under laboratory conditions. The measured CaCO 3 contents for MICP soil specimens that were treated with bacterial cultures grown in DMP medium (60%, w/v) was 15·30 ± 0·04 g ml -1 and POME medium (40%, v/v) was 15·49 ± 0·05 g ml -1 after 21 days curing. The scanning electron microscopy showed that soil treated with DMP had rhombohedral structure-like crystals with smooth surfaces, whilst that of POME entailed ring-like cubical formation with rough surfaces Electron dispersive X-ray analysis was able to identify a high mass percentage of chemical element compositions (Ca, C and O), whilst spectrum from Fourier-transform infrared spectroscopy confirmed the vibration peak intensities for CaCO 3 . Atomic force microscopy further showed clear topographical differences on the crystal surface structures that were formed around the MICP treated soil samples. These nutrient sources (DMP and POME) showed encouraging potential cultivation mediums to address high costs related to bacterial cultivation and biocementation treatment.
(© 2022 The Society for Applied Microbiology.)
Databáze: MEDLINE
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