Department Of Environmental Science And Technology

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Author: search.filters.author.Mago, Monika

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    Sustainable utilization and treatment of barnyard grass (Echinochloa crus-galli) weed biomass using vermitechnology
    (Springer, 2023-07-18T00:00:00) Gupta, Renuka; Mago, Monika; Garg, Vinod Kumar
    The present research is an attempt to manage Barnyard grass (Echinochloa crus-galli), a common rice weed, sustainably by vermicomposting technology. Echinochloa crus-galli (EC) biomass blended with cow dung in combination: 20:80, 40:60, 50:50, 60:40, and 80:20 with two controls 100% CD and 100% EC were vermicomposted�for 63�days. Earthworms could not grow well in feedstocks having higher percentage of EC. Total Kjeldahl nitrogen, total available phosphorus and total potassium in final vermicomposts were in the range of 13.6�21.5�g�kg?1, 11.8�15.9�g�kg?1, and 20.1�27.6�g�kg?1, respectively. Respiration rate (42�98 mgCO2 kg?1 VC 48�h?1) confirms vermicompost maturity and falls within the recommended limits (< 120 mgCO2 kg?1 VC 48�h?1). Vermicomposting process reduced the weed mass by 2.20�3.03 folds depicting its�effective decomposition. It was inferred from the results�that this weed can be converted into nutrient-rich manure employing vermicomposting and�this process facilitating the management of E. crus-galli in a cost-effective and environmentally sustainable manner. � 2023, International Society for Tropical Ecology.
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    Infusion of fruit-vegetable waste biomass into bakery sludge to enhance nutrient availability and vermicompost maturity using Eisenia fetida
    (Springer Science and Business Media Deutschland GmbH, 2022-12-23T00:00:00) Gupta, Renuka; Mago, Monika; Garg, Vinod Kumar
    Vermicomposting of bakery sludge (BS) was studied when amended with fruit-vegetable waste (FV) and cow dung (CD) with different proportions in vermi-units (VU): VU1(CD100), VU2(CD75BS25), VU3(CD50BS25FV25), VU4(CD25BS25FV50), and VU5(CD25 BS50FV25). Results showed a reduction in pH and total organic carbon and an increase in electrical conductivity, ash content, nitrogen, phosphorus, and potassium after vermicomposting. Carbon/nitrogen decrease followed: VU3 > VU1 > VU4 > VU2 > VU5, whereas a maximum reduction in carbon/phosphorus (60.7%) was observed in VU3 and a minimum (44.8%) in VU5. Seed germination assay of Cicer arietinum was 71�138% with maximum in VU3. Respiration rates of 69�115 mgCO2 kg?1VC48h?1 were achieved signifying stability and non-toxic impact. The presence of FV waste in vermi-units enhanced earthworm population, biomass, growth rate, and cocoons. VU3 exhibited higher macro- and micronutrients as well as worm growth and fecundity over other vermi-units. Based on results, FV waste and CD amendment at 25% and 50%, respectively, are suggested as appropriate to produce enriched vermicompost from BS using Eisenia fetida. � 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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    Sustainable treatment and nutrient recovery from leafy waste through vermicomposting
    (Elsevier Ltd, 2021-11-22T00:00:00) Mago, Monika; Gupta, Renuka; Yadav, Anoop; Kumar Garg, Vinod
    The present investigation was carried out to evaluate the vermicomposting potential of two cruciferous vegetables' residual biomasses under laboratory conditions. Cabbage and cauliflower residual biomasses were spiked with 60% cow dung and vermicomposted for 90 days. The results showed a decrease in pH (5.3�9.8%), Total Organic Carbon (36.7�42.8%); increase in Electrical Conductivity (33�99.4%) and ash content (144.7�187.8%) after vermicomposting. Significant reduction in C:N ratio (49.5�76.4%) and C:P ratio (62.8�66.04%), increase in Total Kjeldahl Nitrogen (49.3�85.3%), Total Available Phosphorus (68.2�98.1%), Total Potassium (91.8�120.3%) were observed. FT-IR spectra of the vermicomposts had lesser band heights and peak intensities than raw materials. This evidenced decomposition of organic compounds and vermicompost stability. Germination Index values was calculated to determine the phytotoxicity level. Earthworms' growth and prolificacy was evaluated in terms of biomass gain, cocoons production and worm growth rate. Finally, it was inferred that cruciferous vegetables' biomass can be used for vermicomposting. The cauliflower residual biomass has shown better decomposition efficiency than cabbage residual biomass. � 2021 Elsevier Ltd
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    Management of banana crop waste biomass using vermicomposting technology
    (Elsevier Ltd, 2021-01-20T00:00:00) Mago, Monika; Yadav, Anoop; Gupta, Renuka; Garg, V.K.
    This study reports the vermicomposting of banana crop waste biomass by Eisenia fetida. Cow dung has been used as bulking agent in this study. The experiment was conducted in six vermireactors containing different ratios of banana leaf waste biomass (BL) and cow dung (CD) for 105 days. Earthworm activity significantly reduced pH, TOC, C:N and C:P ratio of the wastes. Whereas macronutrients and micronutrients content increased after vermicomposting. TOC content of wastes reduced by 40�64% and C:N ratio of the vermicomposts was in the range of 8.9�24.3. The benefit ratio for heavy metals (Cu, Fe, Zn, Cd, Pb, Mn and Cr) was in the range of 0.23�3.44. The results indicated that the growth and fecundity of the earthworms was best in the vermireactors having 20�40% BL. Finally, it was concluded that vermicomposting can be included in the overall scheme of banana crop waste management. � 2021 Elsevier Ltd