Eisenia fetida mediated vermi-transformation of tannery waste sludge into value added eco-friendly product: An insight on microbial diversity, enzyme activation, and metal detoxification

Chakraborty, Priyanka; Sarkar, Sampad; Mondal, Sandip; Agarwal, B. K.; Kumar, Arvind; Bhattacharya, Sabyasachi; Bhattacharya, Satya Sundar; Bhattacharyya, Pradip

doi:10.1016/j.jclepro.2022.131368

Cited by 23 publications

(13 citation statements)

References 68 publications

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“…These data differ from those studies in which a decrease in K was observed at the end of the vermicomposting process of tanning sludge mixed with cattle dung [20]. This decrease could be related to K consumption by the earthworms [21]. It is important to note that in all treatments, K concentrations were much higher at the end of the trial than they have been at the beginning.…”

Section: Preparation and Characterizations Of Vermicompostcontrasting

confidence: 94%

“…A signi cant decrease in the C/N ratio (which is one of the most traditional indicators of the maturation of a compost) after the vermicomposting process in all treatments was observed. These results are related to the decrease in TOC and increase in N concentrations observed after vermicomposting which corroborates with the results of different studies that also demonstrated that the acceleration in humidi cation promoted by earthworms during vermicomposting causes a decrease in the C/N ratio [21].…”

Section: Preparation and Characterizations Of Vermicompostsupporting

confidence: 90%

“…1 shows the Total Organic Carbon (TOC), Total Kjeldahl Nitrogen (TKN), Total Pottasium (TK), Total Pospurus (TP), and carbon-nitrogen ratio (C/N) analysed nutrient data from 0-and 90-day vermicomposting. The TOC parameter shows organic carbon signi cant decline, which is in congruence with the other studies' vermicomposting [20,21]. There are two main reasons why TOC decreases after the vermicomposting process: the mineralization of the organic matter (a process that happens when earthworms and microorganisms work together), and the annelids' diet, as they use some of the carbon in their diet to build their biomass.…”

Section: Preparation and Characterizations Of Vermicompostsupporting

confidence: 86%

“…A linear rise in N concentration was seen as the doses of primary waste and lime were increased in the cattle dung. Even though these statistics don't match with other reports [21], they are consistent with other research that used vermicomposting on substrates other than tanning sludge [20,21]. The mass reduction during vermicomposting is associated with an increase in nitrogen (N) due to the nitrogenating of the earthworms' byproducts and the release of carbon through their metabolic processes [21].…”

Section: Preparation and Characterizations Of Vermicompostsupporting

confidence: 68%

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Leather Industries Solid Waste Conversion to Organic Fertilizer through Vermicomposting: Utilization for Plant Growth

Abdulla-Al-Mamun

Hossain

et al. 2023

Preprint

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The generation of leather industries' solid waste is a matter of concern in the present world for its potential polluting ability. This study has assessed intend vermicomposting of leather industries generated lime flesh and shaving waste through a mix with cattle dung using Eisenia fetida earthworm, aiming at sustainable reuse in agriculture. The chromium content of shaving waste was optimized and brought under 2 mg/kg using hydrogen peroxide with potassium carbonate treatment and lime flesh was treated with hydrochloric acid treatment. Treated shaving waste and lime flesh were mixed with cattle dung in a proportion portion of 1:1 and 2:1 in different vermicompost fields. After 30 days 40 Eisenia fetida were introduced in each field and vermicomposted for 90 days within 50% of moisture was maintained. The number of earthworms was observed notably increases in every bed of 1:1 portion of vermicompost and a higher 2:1 portion of waste remarkably attacked the growth of worms. The parameters of this study were analyses and the number of earthworms, pH, total organic carbon (TOC), total Kjeldahl nitrogen (TKN), carbon and nitrogen ratio (C: N), total potassium (TK) and total phosphorus (TP) readings were taken at 0, 30, 60 and 90 days respectively. The resulting composting in a substantial reduction of pH, TOC and the C: N ratio was notably decreased by approximately nine-fold and increases in TKN and TP were seen. A slight reduction of TK was also observed. The results show that the earthworm Eisenia fetida has been able to convert the lime flesh and shaving waste into nutrient-enriched fertilizer products in the same proportion of waste and cow dung. However, the resultant vermicompost was applied on the Napier grass plantation. The accumulation of heavy metal effect on plants was investigated systemically for eco-friendly plant growth. The composts and plants’ different parts were analyzed for heavy metals and those found under permissible limits recommended by WHO. It was found vermicompost enhanced the organic matter significantly and nutrients are also improved for better crop yield.

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Section: Preparation and Characterizations Of Vermicompostcontrasting

confidence: 94%

Section: Preparation and Characterizations Of Vermicompostsupporting

confidence: 90%

Section: Preparation and Characterizations Of Vermicompostsupporting

confidence: 86%

Section: Preparation and Characterizations Of Vermicompostsupporting

confidence: 68%

See 2 more Smart Citations

Leather Industries Solid Waste Conversion to Organic Fertilizer through Vermicomposting: Utilization for Plant Growth

Abdulla-Al-Mamun

Hossain

et al. 2023

Preprint

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“…In general, earthworm survival is closely related to their density, habitat environment, and food quality [ 25 ]. As shown in Figure 1 , earthworm survival showed a slightly decreasing trend for all three treatments ( Figure 1 a), but the net weight increased in all cases ( Figure 1 b).…”

Section: Resultsmentioning

confidence: 99%

Response of Antibiotic Resistance Genes and Related Microorganisms to Arsenic during Vermicomposting of Cow Dung

Chen

Zhang

et al. 2022

IJERPH

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Antibiotic resistance pollution in livestock manure is a persistent issue that has drawn public attention. Vermicomposting is an ecofriendly biological process that can render livestock manure harmless and resourceful. However, little is known about the impact of vermicomposting on antibiotic resistance in livestock manure under stress caused by potentially toxic arsenic levels. Herein, lab-scale vermicomposting was performed to comprehensively evaluate the shift in antibiotic resistance genes (ARGs) and related microorganisms in fresh earthworm casts as well as vermicompost product health (i.e., nutrient availability and enzyme activity) when they were fed on arsenic-contaminated cow manure. The results showed that the earthworms’ interaction with cow dung led to a significant reduction in ARG concentrations, especially for tetracycline ARGs (tet-ARGs), β-lactam ARGs (bla-ARGs), and quinolone ARGs (qnr-ARGs). However, arsenic significantly enhanced ARG accumulation in earthworm casts in a dose-dependent manner. Moreover, vermicomposting increased the percentage of Bacteroidota in the converted products. Furthermore, arsenic exposure at low concentrations promoted the proliferation of Proteobacteria, whereas high concentrations had little effect on Proteobacteria. Our study provides valuable insight into the changes in the antibiotic resistome and related microorganisms during vermicomposting of arsenic-amended cow manure, and it is crucial to explain the environmental impact of earthworms and improve our understanding of the reciprocal benefits of soil invertebrates.

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An eco‐friendly management of organic waste and recycling of pond water of zoo aquatic animals by using Eudrilus eugeniae in Gandhi Zoological Park: A case study of vermicompost maturity

Mir

Shrivastava

2023

Environmental Quality Mgmt

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Zoo waste is a common problem in urban areas, as it overloads municipalities. To enhance the park's appeal, sustainability, and cleanliness, a pilot vermicomposting process was implemented as an alternative for organic waste disposal. It aimed to address the negative effects of poor organic waste management. Three types of pond water, namely hippopotamus, crocodile, and gharial, were recycled. Additionally, ostrich droppings and the nitrogenous compounds abundant in carnivore feces were utilized. The study sought to improve organic waste management and recycle pond water using exotic worms. Chemical and physical analyses were conducted on pond water and vermicompost obtained from Gandhi Zoological Park, revealing their high nutrient content. Fourier transform infrared spectroscopy was employed to study the functional groups present in the compost and vermicompost, allowing the detection of vermicompost maturity. The biomass of exotic earthworms, as well as the count of cocoons, juveniles, and adults, was assessed during different seasons of the year. This approach facilitated the recycling of pond water and the reduction of organic waste within the zoo premises. It involved the symbiotic cooperation of earthworms and bacterial colonies, transforming the waste into a high‐quality product with balanced macro nutrients. The novelty of the study lies in its focus on nutrient recycling in pond water, ostrich droppings, and vermicomposting of organic waste from carnivores.

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Eisenia fetida mediated vermi-transformation of tannery waste sludge into value added eco-friendly product: An insight on microbial diversity, enzyme activation, and metal detoxification

Cited by 23 publications

References 68 publications

Leather Industries Solid Waste Conversion to Organic Fertilizer through Vermicomposting: Utilization for Plant Growth

Leather Industries Solid Waste Conversion to Organic Fertilizer through Vermicomposting: Utilization for Plant Growth

Response of Antibiotic Resistance Genes and Related Microorganisms to Arsenic during Vermicomposting of Cow Dung

An eco‐friendly management of organic waste and recycling of pond water of zoo aquatic animals by using Eudrilus eugeniae in Gandhi Zoological Park: A case study of vermicompost maturity

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