Biodegradation of 4-chlorophenol in batch and continuous packed bed reactor by isolated Bacillus subtilis

Patel, Naveen; Shahane, Shraddha; Bhunia, Biswanath; Mishra, Umesh; Chaudhary, Vinod Kumar; Srivastav, Arun Lal

doi:10.1016/j.jenvman.2021.113851

Cited by 40 publications

(5 citation statements)

References 96 publications

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“…Then, three bottles were connected to the air supply to create aerobic conditions, and the other three bottles had their gas inlets connected to pure nitrogen gas to create anaerobic conditions via a continuous supply of gas into the fermentation bottles. The growth of the L. plantarum was counted every day referred to the method described before ( 12 ), and the specific growth rate (μ) was calculated as the equation (1) ( 13 ) as following.…”

Section: Methodsmentioning

confidence: 99%

Insights into the metabolic profiling of Polygonati Rhizoma fermented by Lactiplantibacillus plantarum under aerobic and anaerobic conditions using a UHPLC-QE-MS/MS system

Wang

Lao²,

Kang

et al. 2023

Front. Nutr.

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IntroductionPolygonati Rhizoma is a multi-purpose food with medicinal uses. Fermentation of Polygonati Rhizoma by lactic acid bacteria could provide new insights into the development of Polygonati Rhizoma products.MethodsIn this study, Lactiplantibacillus plantarum was fermented with Polygonati Rhizoma extracts in a bioreactor under aerobic and anaerobic conditions with pH and DO real-time detection. Metabolic profiling was determined by UHPLC-QE-MS/MS system. Principal component analysis and orthogonal partial least-squares discriminant analysis were used to perform multivariate analysis.ResultsA total of 98 differential metabolites were identified in broth after fermentation, and 36 were identified between fermentation under aerobic and anaerobic conditions. The main metabolic pathways in the fermentation process are ABC transport and amino acid biosynthesis. Most of the compounds such as L-arginine, L-aspartic acid, leucine, L-lysine, citrate, inosine, carnitine, betaine, and thiamine were significantly increased during fermentation, playing a role in enhancing food flavor. Compared with anaerobic fermentation, aerobic conditions led to a significant rise in the levels of some compounds such as valine, isoleucine, and glutamate; this increase was mainly related to branched-chain amino acid transaminase, isocitrate dehydrogenase, and glutamate dehydrogenase.DiscussionAerobic fermentation is more beneficial for the fermentation of Polygonati Rhizoma by L. plantarum to produce flavor and functional substances. This study is the first report on the fermentation of Polygonati Rhizoma by L. plantarum and provides insights that would be applicable in the development of Polygonati Rhizoma fermented products.

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Section: Methodsmentioning

confidence: 99%

Insights into the metabolic profiling of Polygonati Rhizoma fermented by Lactiplantibacillus plantarum under aerobic and anaerobic conditions using a UHPLC-QE-MS/MS system

Wang

Lao²,

Kang

et al. 2023

Front. Nutr.

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“…A model was created for a biological reactor that took into account both the Haldane and Monod growth models, similar to how one would for a photochemical reaction chamber. Since the majority of the samples were taken during the logarithmic phase of bacterial development, as was the case with Patel et al [4], we made the assumption that no byproducts of 4-CP's biodegradation would be produced. Additionally, we believed that cells' maintenance coefficient would be negligible [27,28].…”

Section: Steady-state Estimation Of Biological Parametersmentioning

confidence: 99%

“…As a result, numerous contaminants are frequently detected in the effluent water from these enterprises, the most prevalent of which is chlorophenol [2], which is reportedly exceedingly harmful to both humans and aquatic life [3]. The levels of 4-chlorophenol (4-CP) in the effluents from the manufacturers of these products range in concentration from 10 mg•L −1 to 200 mg•L −1 [4]. Numerous derivatives of chlorophenol are refractory, which makes them resistant to biological deterioration.…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of the Kinetic Properties Controlling the Combined Chemical and Biological Treatment of Toxic Recalcitrant Organic Compounds from Aqueous Solution

Makgato

Chirwa

2022

Catalysts

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Due to their high toxicity, propensity for cancer, teratogenicity, mutagenicity, and genotoxicity, hazardous water-soluble phenolic compounds must be controlled immediately. In this study, a model was created to simulate the degradation of harmful recalcitrant organic compounds in a combined chemical and biological treatment system. The parameter estimations with inhibition coefficient (Haldane model) and without inhibition coefficient (Michaelis-Menten model) were assessed over a wide range of initial concentrations using the Monod-like model. The kinetic parameters were optimized using AQUASIM 2.0 software. At a 50 mgL−1 feed concentration of 4-chlorophenol, removal efficiencies of more than 98% were attained under these circumstances. The primary kinetic parameters were identified and their values models were validated using the fitted parameter values that reached a good degree of agreement (R2 = 0.998). We may better comprehend and make use of the complex phenolic compounds’ biodegradation processes, such as progress optimization and scale-up, by understanding the mechanisms of substrate interaction and the new kinetic models that have been provided in this work.

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“…Bacillus subtilis is a gram-positive bacteria, that is pervasive in the geo-environment and is nonpathogenic to humans 25 . B. subtilis has been frequently used to degrade several organic contaminants 24,[26][27][28][29][30] . In addition, adsorption is another effective technology used to remove several contaminants.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Bacillus subtilis BMT4i/Activated carbon composite for removal of diclofenac and carbamazepine from aqueous solution

Tiwari,

RAYCHOUDHURY,

Bag

2024

Preprint

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Pharmaceutical contaminants (PhACs) have become a worldwide concern in the present scenario. It is considered a group of emerging contaminants and is ubiquitously found in different water bodies in higher concentrations, leading to the deterioration of the water quality and causing ecotoxicity to several non-target organisms. This study extensively evaluates the efficacy of the bacterial strain Bacillus subtilis BMT4i for removing two emerging PhACs, diclofenac (DCF) and carbamazepine (CBZ), from an aqueous solution. A series of batch experiments were conducted by keeping parameters similar to wastewater effluent to investigate the biodegradation of B. subtilis BMT4i in removing PhACs in real scenarios. The study showed that around 67% and 50% of DCF and CBZ were removed within 72 hours when PhACs were supplied as the sole carbon source. Moreover, in co-metabolism with other carbon and nitrogen sources, the percentage removal was enhanced by 20-30%. Further, B. subtilis BMT4i were immobilized on two activated carbons (ACs) i.e., ACEco, and ACDarco prepared from coconut shells and coal so that the composite could directly be used as a bioreactor. The biofilm formation over ACs was confirmed by scanning electron microscopy and Fourier-transform infrared spectroscopy. The results obtained with batch experiment showed over 85-100% removal of both PhACs in a short duration of 2 hours. Moreover, the column studies revealed that around 60-77% of 1 mg/l PhACs were removed by passing over 2 liters of PhACs contaminated water. Overall, the current study confirms that the B. subtilis BMT4i/ACs composite shows promising performance for removing selected PhACs from water.

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Biodegradation of 4-chlorophenol in batch and continuous packed bed reactor by isolated Bacillus subtilis

Cited by 40 publications

References 96 publications

Insights into the metabolic profiling of Polygonati Rhizoma fermented by Lactiplantibacillus plantarum under aerobic and anaerobic conditions using a UHPLC-QE-MS/MS system

Insights into the metabolic profiling of Polygonati Rhizoma fermented by Lactiplantibacillus plantarum under aerobic and anaerobic conditions using a UHPLC-QE-MS/MS system

An Evaluation of the Kinetic Properties Controlling the Combined Chemical and Biological Treatment of Toxic Recalcitrant Organic Compounds from Aqueous Solution

Efficacy of Bacillus subtilis BMT4i/Activated carbon composite for removal of diclofenac and carbamazepine from aqueous solution

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