Detoxification of chromium-rich tannery industry sludge by Eudrillus eugeniae: Insight on compost quality fortification and microbial enrichment

Goswami, Linee; Mukhopadhyay, Rupak; Bhattacharya, Suvendu; Das, P.; Goswami, Rinku

doi:10.1016/j.biortech.2018.07.001

Cited by 45 publications

(14 citation statements)

References 35 publications

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“…The effect of pH (3,4,5,6,7,8,9, and 10) on the growth of the isolated strains was measured in a 100-well bacterial culture plate. The pH was adjusted by adding either 0.1 M HCl or 0.1 M NaOH as needed, which were tested in triplicate.…”

Section: Conditions For Bacterial Growthmentioning

confidence: 99%

“…Both B. cereus D. and B. cereus 332 were able to tolerate changes in the pH of the external environment, indicating their great potential for applications in pollution control. The pH value of chromium-containing wastewater or sludge is usually neutral [5,26]. Therefore, pH 7.0 was selected as the culture condition for subsequent experiments.…”

Section: The Effect Of Ph On the Growth Of The Isolated Strainsmentioning

confidence: 99%

“…Chromium is a toxic heavy metal contaminant [1][2][3][4], which is heavily produced in waste from industries, including tanneries, electroplating, metal smelting, acid mine drainage, and other industries [5][6][7]. These untreated chromium-containing pollutants are mostly released into the environment, posing threats to ecosystems [2,5]. There are two common and stable oxidation states of chromium in the environment, namely Cr(VI) and Cr(III) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, the first level standard of chromium content in a soil environment is less than 90 mg/kg. However, the chromium content of industrial wastes far exceeds these safety standards, and could be as high as 717.61 mg/kg in tannery sludge [5].…”

Section: Introductionmentioning

confidence: 99%

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Isolation and Identification of Chromium Reducing Bacillus Cereus Species from Chromium-Contaminated Soil for the Biological Detoxification of Chromium

Gao

et al. 2020

IJERPH

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Chromium contamination has been an increasing threat to the environment and to human health. Cr(VI) and Cr(III) are the most common states of chromium. However, compared with Cr(III), Cr(VI) is more toxic and more easily absorbed, therefore, it is more harmful to human beings. Thus, the conversion of toxic Cr(VI) into Cr(III) is an accepted strategy for chromium detoxification. Here, we isolated two Bacillus cereus strains with a high chromium tolerance and reduction ability, named B. cereus D and 332, respectively. Both strains demonstrated a strong pH and temperature adaptability and survival under 8 mM Cr(VI). B. cereus D achieved 87.8% Cr(VI) removal in 24 h with an initial 2 mM Cr(VI). Cu(II) was found to increase the removal rate of Cr(VI) significantly. With the addition of 0.4 mM Cu(II), 99.9% of Cr(VI) in the culture was removed by B. cereus 332 in 24 h. This is the highest removal efficiency in the literature that we have seen to date. The immobilization experiments found that sodium alginate with diatomite was the better method for immobilization and B. cereus 332 was more efficient in immobilized cells. Our research provided valuable information and new, highly effective strains for the bioremediation of chromium pollution.

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Section: Conditions For Bacterial Growthmentioning

confidence: 99%

Section: The Effect Of Ph On the Growth Of The Isolated Strainsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Isolation and Identification of Chromium Reducing Bacillus Cereus Species from Chromium-Contaminated Soil for the Biological Detoxification of Chromium

Gao

et al. 2020

IJERPH

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“…The particular physiological behavior and gut environment of earthworms signi cantly altered the microbial community of soil and reduced ARGs abundances [11][12][13][14][30][31][32]. Earthworms also have excellent performance in environmental bioremediation, such as heavy metals and organic pollutants [43][44][45][46]. Some of these environmental pollutants may contribute to the horizontal transfer of ARGs [47,48].…”

Section: Signi Cance Of This Studymentioning

confidence: 99%

Did Application of Digested Sewage Sludge as Soil Amendment Alter the Abundances of Antibiotic Resistance Genes and Microbial Communities in Soil and Earthworm Gut?

Li¹,

Li²,

Shao³

et al. 2020

Preprint

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Background Digested sewage sludge has been widely applied as soil amendment for enhanced crop production. However, given that digested sludge is abundant with antibiotic resistance genes (ARGs) and antibiotic resistant bacteria, the impact of digested sludge amendment on the abundances of ARGs and microbial communities in soil and soil fauna (e.g., earthworms) remains largely unknown. In this study, the patterns of ARGs and microbial communities in soil and gut of earthworms after 80-days cultivation with digested sewage sludge amendment were investigated to gain insights into this impact. Results The results show that the digested sludge amendment increased the initial abundances of ARGs (e.g., tetA, tetQ, and sulII) in soil. However, after 80-days cultivation, the absolute abundances of target ARGs decreased by 62.3–95.4%. The reduction in ARGs absolute abundances was further enhanced by 31.4–84.7% in the presence of earthworms. In contrast, the relative abundances of some ARGs (e.g., tetA, sulI, and blaTEM−1) in the gut of earthworms increased by 41–130 folds. The microbial community structure of soil was greatly altered because of the introduction of digested sewage sludge at initial, but it recovered to its original pattern after 80-days cultivation. This could be attributed to the gradual attenuation of anaerobic microorganisms under aerobic conditions in soil. In particular, the presence of earthworms further enhanced this phenomenon. The reduction of ARGs in the amended soils was likely attributed to microbial community shift based on redundancy analysis. Several bacterial families (e.g., Saprospiraceae, Chitinophagaceae, and Rhodanobacteraceae) were significantly correlated with the target ARGs. Conclusions Our results reveal that the enrichment of ARGs in soil caused by digested sludge-amendment would recover to their original levels before amendment, highlighting the contribution of earthworms to reducing the ARG abundances in amended soil via shifting the microbial community. However, we also found that the amended soil could increase ARGs abundance in the earthworm gut, which may enhance the potential risk of ARGs spread via food chain. These results may provide a new sight on the control of ARGs occurrence and dissemination in sludge-amended soil ecosystem with consideration of the impact of earthworms.

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Vermi-Remediation of Metal(loid)s Contaminated Surfaces

Goswami

Das

Hussain

et al. 2023

Bio-Inspired Land Remediation

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Detoxification of chromium-rich tannery industry sludge by Eudrillus eugeniae: Insight on compost quality fortification and microbial enrichment

Cited by 45 publications

References 35 publications

Isolation and Identification of Chromium Reducing Bacillus Cereus Species from Chromium-Contaminated Soil for the Biological Detoxification of Chromium

Isolation and Identification of Chromium Reducing Bacillus Cereus Species from Chromium-Contaminated Soil for the Biological Detoxification of Chromium

Did Application of Digested Sewage Sludge as Soil Amendment Alter the Abundances of Antibiotic Resistance Genes and Microbial Communities in Soil and Earthworm Gut?

Vermi-Remediation of Metal(loid)s Contaminated Surfaces

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