Vermicomposting of coal fly ash using epigeic and epi-endogeic earthworm species: nutrient dynamics and metal remediation

Usmani, Zeba; Kumar, Vipin; Mritunjay, Sujeet Kumar

doi:10.1039/c6ra27329g

Cited by 35 publications

(12 citation statements)

References 74 publications

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“…The trend of TBG was T2 > T1 > T7 > T6 > T3 > T8 > T4 > T5 > T9. These results show that mixtures composed of 100% by-product give poor results, similar to recent studies, such as Usmani et al [35], who reported that poor biomass growth of earthworms was observed in the treatment comprised solely of coal fly ash, without manure, and Gong et al [36] where better results were obtained when garden wastes were mixed with cattle manure and/or spent mushroom substrate than in solitary. Similar conclusions were obtained during vermicomposting of water lettuce by Suthar et al [37].…”

Section: Biological Resultssupporting

confidence: 88%

Feasibility of Vermicomposting of Spent Coffee Grounds and Silverskin from Coffee Industries: A Laboratory Study

et al. 2020

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In the coffee industry, several by-products are generated during the production and consumption of coffee and represent an important waste from an environmental viewpoint. For improving the knowledge about this issue, a laboratory vermicomposting study of coffee silverskin (CS) and spent coffee grounds (SCG) spiked with mature horse manure (HM) in different proportions and using earthworm Eisenia andrei was carried out. The 60-day study focused on biological parameters such as total biomass gain, growth rate, cocoon production, and mortality. This study also investigated whether the vermicompost obtained could be useful and lacked toxicity through a seed germination test using hybrid wheat seeds. Results showed a disparity depending on the type of residue and the mixture used. Best options were those treatments with a medium–low amount of residue; 25% for SCG and 25% or 50% for CS. In addition, lack of toxicity was confirmed in all treatments. In conclusion, it is possible to carry out a vermicomposting of SCG and CS with some specific features.

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Section: Biological Resultssupporting

confidence: 88%

Feasibility of Vermicomposting of Spent Coffee Grounds and Silverskin from Coffee Industries: A Laboratory Study

et al. 2020

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“…Inclusion of RP to supply 8% phosphorus resulted in 2.81 times more Cr; 2.52 times more Cu; 2.76 times more Cd; 6.3 times more Pb and 3.58 times more Zn; within the earthworm tissues; relative to the control at the end of the experiment. According to Usmani et al. (2017) , the metal accumulation ability in earthworms can be evaluated based on the concentration of the metals within the earthworm tissues divided by the metal concentration in the vermicomposts.…”

Section: Resultsmentioning

confidence: 99%

“…Earthworms have, however, been reported to accumulate heavy metals in their bodies and their involvement in vermicomposting of wastes could reduce the amounts of heavy metals present in the final vermicomposts ( Dai et al., 2004 ; Goswami et al., 2016 ). A protein called metallothionein, which plays a critical role in regulation of heavy metal ion chemistry within cells, has been reported to be produced within the gut of earthworms upon exposure to heavy metals ( Goswami et al., 2016 ; Usmani et al., 2017 ). However, there are no studies that have focused on changes in heavy metals during vermicomposting of rock phosphate, and on influence of the presence of earthworms on heavy metal concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…However, there are no studies that have focused on changes in heavy metals during vermicomposting of rock phosphate, and on influence of the presence of earthworms on heavy metal concentrations. It is essential to understand more the biodegradation, nutrient release and changes in heavy metal concentrations during vermicomposting of cow dung – waste paper mixture amended with rock phosphate ( Usmani et al., 2017 ). Thus, the objectives of this study were to evaluate the influence of different inclusion levels of igneous rock phosphate during vermicomposting of cow dung-waste paper mixture on (i) phosphorus and nitrogen bioavailability, compost maturity, and microbial biomass carbon; and (ii) heavy metal concentration in compost and bioaccumulation in earthworms.…”

Section: Introductionmentioning

confidence: 99%

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Vermicomposting manure-paper mixture with igneous rock phosphate enhances biodegradation, phosphorus bioavailability and reduces heavy metal concentrations

Mupondi

Mnkeni

Muchaonyerwa

et al. 2018

Heliyon

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In organic soil fertility management, rock phosphate (RP) is gaining momentum as an acceptable phosphorus source, though much of this P is not bioavailable for plant uptake, particularly in igneous RP. This study evaluated the nutrient solubilization, biodegradation and heavy metal concentration when cow dung – waste paper mixture amended with increasing rates of igneous RP was vermicomposted with E. fetida. The cow dung was optimized to a C/N ratio of 30 using waste paper and amended with RP to provide 0%; 2%; 4% and 8% of elemental phosphorus on a dry w/w basis. Incorporation of RP at 2% and 8% P enhanced compost biodegradation resulting in a 12% and 22% significantly (P < 0.001) lower final C/N ratio, respectively, compared to the control; together with higher humification parameters. Amending the cow dung – waste paper mixture with 2%, 4% and 8% P as rock phosphate, resulted in a 39%; 50% and 65% more resin extractable P, respectively, relative to the control. Similarly, the bicarbonate extractable P, which represents the bioavailable P fraction, increased consistently by 19%; 28% and 33% following 2%, 4% and 8% RP application, respectively. Though incorporation of RP initially resulted in increased heavy metal levels, reductions of 40%; 35%; 35%; 40% and 45% for Cr, Cu, Cd, Pb and Zn, respectively, were observed in the 8% RP treatment after 8 weeks, due to the presence of earthworms. Vermicomposting with E. fetida significantly reduced heavy metals to levels below the maximum permissible concentration of potentially toxic elements in soils after 8 weeks. This study demonstrates the potential of optimized vermicomposting with igneous RP for generating nutrient rich organic fertilizers.

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“…nitrogen (N) and phosphorous (P), and a lower rate of FA degradation after its application in soil. Moreover, FA has a prevalence of heavy metals in the material and soluble forms 10 . FA comprises a high concentration of toxic heavy metals like Cr, Pb, Cd, Ni, Cu, Zn, etc.…”

Section: Introductionmentioning

confidence: 99%

Enhanced soil fertility, plant growth promotion and microbial enzymatic activities of vermicomposted fly ash

Usmani

Kumar

Gupta

et al. 2019

Sci Rep

Self Cite

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It is reported that coal consumption in the Asia-Pacific region is going to increase to about 87.2 percent by 2035. Management of coal combustion residues (CCRs) generated by industries is a major bottleneck towards handling the repercussions of coal usage. The present study investigates a management technique for these potentially hazardous wastes by means of vermicomposting. In the present investigation, studies were made on the effects of various concentrations of vermicomposted fly ash (VCF) added to agricultural soil, on the growth and yield of tomato ( Lycopersicon esculentum Mill.) and brinjal ( Solanum melongena L.) plants. The toxicity of trace elements in VCF were estimated using coefficient of pollution and potential ecological risk index, which revealed no apparent risks to the environment. A gradual increase in VCF concentrations in the agricultural soil improved the physico-chemical properties, enzymatic activities, microbial biomass, carbon and microbial population upto 90 days after sowing of seeds. The VCF amendments significantly ( p < 0 . 05 ) improved the soil quality (2.86% nitrogen and 1.05% Phosphorous) and germination percentage (82.22%) of seeds in L . esculentum and also in S . melongena . The results of this study reveal that, CCRs can be effectively managed in agriculture specially in developing economies.

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Vermicomposting of coal fly ash using epigeic and epi-endogeic earthworm species: nutrient dynamics and metal remediation

Abstract: Study highlights the metal removal efficiency and nutrient dynamics of three potent earthworm species from coal fly ash with a comparative aspect.

Cited by 35 publications

References 74 publications

Feasibility of Vermicomposting of Spent Coffee Grounds and Silverskin from Coffee Industries: A Laboratory Study

Feasibility of Vermicomposting of Spent Coffee Grounds and Silverskin from Coffee Industries: A Laboratory Study

Vermicomposting manure-paper mixture with igneous rock phosphate enhances biodegradation, phosphorus bioavailability and reduces heavy metal concentrations

Enhanced soil fertility, plant growth promotion and microbial enzymatic activities of vermicomposted fly ash

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