Importance of carbon to nitrogen ratio in microbial cement production: Insights through experiments and genome-scale metabolic modelling

Raja, Muhammad Asif Zahoor; Sundararaghavan, Archanaa; Dhami, Navdeep Kaur; Mukherjee, Abhijit; Suraishkumar, G. K.

doi:10.1016/j.bej.2022.108573

Cited by 9 publications

(5 citation statements)

References 55 publications

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“…These include, but are not limited to, calcite, aragonite, vaterite, dolomite, CaCO 3 monohydrate, CaCO 3 hexahydrate and amorphous CaCO 3 ( Rodriguez-Navarro et al, 2012 ; Murugan et al, 2021 ). The shape and size of CaCO 3 crystal changes during the precipitation process under different physico-chemical conditions and in association with different microbial communities ( Wilby et al, 1996 ; O'Brien et al, 2002 ; Raff et al, 2008 ; Dhami et al, 2012 ; Raff and Raff, 2014 ; Plet et al, 2016 ; Zhu and Dittrich, 2016 ; Iniesto et al, 2018 ; Grice et al, 2019 ; Dubey et al, 2022 ; Murugan et al, 2022 ). The major factors responsible for microbially induced concretion precipitation include the concentration of calcium, concentration of DIC, pH, and the availability of nucleation sites ( Hammes and Verstraete, 2002 ; Dhami et al, 2013b ; Murugan et al, 2021 ).…”

Section: Concretion Formation Mechanismsmentioning

confidence: 99%

Microbially mediated fossil concretions and their characterization by the latest methodologies: a review

Dhami,

Greenwood,

Poropat

et al. 2023

Front. Microbiol.

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The study of well-preserved organic matter (OM) within mineral concretions has provided key insights into depositional and environmental conditions in deep time. Concretions of varied compositions, including carbonate, phosphate, and iron-based minerals, have been found to host exceptionally preserved fossils. Organic geochemical characterization of concretion-encapsulated OM promises valuable new information of fossil preservation, paleoenvironments, and even direct taxonomic information to further illuminate the evolutionary dynamics of our planet and its biota. Full exploitation of this largely untapped geochemical archive, however, requires a sophisticated understanding of the prevalence, formation controls and OM sequestration properties of mineral concretions. Past research has led to the proposal of different models of concretion formation and OM preservation. Nevertheless, the formation mechanisms and controls on OM preservation in concretions remain poorly understood. Here we provide a detailed review of the main types of concretions and formation pathways with a focus on the role of microbes and their metabolic activities. In addition, we provide a comprehensive account of organic geochemical, and complimentary inorganic geochemical, morphological, microbial and paleontological, analytical methods, including recent advancements, relevant to the characterization of concretions and sequestered OM. The application and outcome of several early organic geochemical studies of concretion-impregnated OM are included to demonstrate how this underexploited geo-biological record can provide new insights into the Earth’s evolutionary record. This paper also attempts to shed light on the current status of this research and major challenges that lie ahead in the further application of geo-paleo-microbial and organic geochemical research of concretions and their host fossils. Recent efforts to bridge the knowledge and communication gaps in this multidisciplinary research area are also discussed, with particular emphasis on research with significance for interpreting the molecular record in extraordinarily preserved fossils.

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Section: Concretion Formation Mechanismsmentioning

confidence: 99%

Microbially mediated fossil concretions and their characterization by the latest methodologies: a review

Dhami,

Greenwood,

Poropat

et al. 2023

Front. Microbiol.

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“…The carbon-to-nitrogen (C/N) ratio is pivotal in composting, as microorganisms need a balanced ratio of carbon to nitrogen to sustain their active (Murugan et al, 2022). Considering the crucial role of the C/N ratio, understanding its impact on both microbial nitrogen utilization becomes essential, especially when employing the microorganism as a probiotic for water treatment in aquaculture.…”

Section: Introductionmentioning

confidence: 99%

Exploring the potential of Candida sp. as probiotic for enhancing water quality in aquaculture

Cheng,

Li,

Balantyne

et al. 2024

Preprint

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Aquaculture is an important industry that provides a significant amount of seafood globally. However, the industry faces challenges such as water quality management. The objective of the study was to isolate and identify bacteria with the capacity to eliminate nitrite in water from shrimp ponds and evaluate their potential as probiotics to improve water quality. Additionally, the study also determines the ideal conditions for the probiotic to effectively reduce nitrite-N and ammonia-N. Water samples were collected from four shrimp ponds (SW1', SW2', SW3', SW4') and isolates were obtained. Among all the samples, SW4 was the most effective in reducing concentration of nitrite-N. Upon further isolation of SW4, the strain SW4-W6 showed significant nitrite-N reduction capability compared to 19 other isolates tested. Through morphological, genetic (ITS sequence), and phylogenetic analyses, strain SW4-6 was identified. Candida sp. SW4-6 showed superior nitrite-N and ammonia-N reduction capabilities with sucrose as the carbon source, with complete reduction observed at a C/N ratio of 15–20. Gene expression analysis revealed up-regulation of nitrite reductase in SW4-6 after inoculation, with significantly higher expression observed with sucrose as the carbon source. Salinity and temperature significantly influenced nitrite-N and ammonia-N reduction by SW4-6, with higher temperatures (30°C) and 0% NaCl favoring faster reduction rates. Candida sp. SW4-6 emerges as a promising probiotic candidate for aquaculture water quality management due to its efficient nitrite-N and ammonia-N reduction capabilities under optimal conditions. Its safety profile and ability to thrive across various salinity and temperature conditions further support its potential applicability in aquaculture.

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“…Microbially induced calcite precipitation (MICP) is a green and innovative soil grouting technology (Mitchell and Santmarina, 2005;Dejong et al, 2006;Van Paassen et al, 2010;Wu et al, 2021;Murugan et al, 2022). The technology can effectively improve the mechanical and hydraulic properties of porous materials such as sands and soils by using the filling and cementing effects of the mineralization product calcium carbonate (Ivanov and Chu, 2008;Soon et al, 2013;Chen et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of MICP treated sand based on bio-chemo-hydro model

Li,

Chen,

Gao

2024

Front. Bioeng. Biotechnol.

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Microbially Induced Calcite Precipitation (MICP) represents an environmentally friendly and innovative soil grouting technology. Involving intricate biochemical processes, it poses challenges for a thorough investigation of factors influencing microbial grouting effectiveness through experimentation alone. Consequently, A three-dimensional numerical model was developed to predict the permeability of bio-grouting in porous media. The numerical model is validated by comparing its results with test results available in the literature. The validated model is then used to investigate the effects of variation bacterial solution concentration, cementation solution concentration, grouting rate and grouting time on grouting effectiveness. It was founded that the remediation effect was positively correlated with the bacterial solution concentration and the number of grouting. An increased grouting rate enhanced the transport efficiency of reactants. Additionally, the concentration of cementation solution exhibited no significant effect on the reduction of calcium carbonate yield and permeability.

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Importance of carbon to nitrogen ratio in microbial cement production: Insights through experiments and genome-scale metabolic modelling

Cited by 9 publications

References 55 publications

Microbially mediated fossil concretions and their characterization by the latest methodologies: a review

Microbially mediated fossil concretions and their characterization by the latest methodologies: a review

Exploring the potential of Candida sp. as probiotic for enhancing water quality in aquaculture

Numerical analysis of MICP treated sand based on bio-chemo-hydro model

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