Department Of Environmental Science And Technology

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Author: search.filters.author.Gupta, RenukaSubject: search.filters.subject.Seed germination

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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