Vermicomposting of tannery sludge mixed with cattle dung into valuable manure using earthworm Eisenia fetida (Savigny)

Pankaj

Chemical Speciation & Bioavailability

et al. 2014

Vermicomposting of phumdi biomass is a good alternative for protecting Loktak Lake and is advantageous for agriculture purposes. Research was carried out on bioavailability and leachability of nutrients (Na, K, Ca and Mg) and heavy metals (Zn, Cu, Mn, Fe, Ni, Pb, Cd and Cr) during vermicomposting of phumdi biomass for 45 days using Eisenia fetida earthworm. The bioavailability of heavy metals was determined in the form of water soluble and diethylene triamine penta-acetic acid (DTPA) extractable. The toxicity characteristic leaching procedure test was performed to determine the leachable heavy metals during the vermicomposting process. The concentration of nutrients increased during the process; whereas the concentration of water soluble, DTPA extractable and leachable heavy metals decreased significantly in all the trials. The vermicomposting of phumdi biomass by Eisenia fetida was very effective for the reduction of bioavailability and leachability of selected heavy metals. The leachability test confirmed that prepared vermicompost is not hazardous for soil, plants and human health. The possibility of using earthworms to mitigate the metal toxicity and to enhance the nutrient profile in phumdi biomass vermicompost, is advantageous in sustainable land renovation practices on a low-input basis.

Section: Earthworm Population and Biomass In Different Treatmentsupporting

confidence: 90%

“…While microbes are reliable for biochemical degradation of organic matter, earthworms are the important drivers of the process by conditioning the substrate and altering its biological activity (Gupta and Garg, 2008;Khwairakpam and Bhargava, 2009;Vig et al, 2011;Singh and Kalamdhad, 2013c).…”

Section: Introductionmentioning

confidence: 99%

Reduction of bioavailability of heavy metals during vermicomposting of phumdi biomass of Loktak Lake (India) using Eisenia fetida

Pankaj

Chemical Speciation & Bioavailability

et al. 2014

Malays. j. sustain. agric.

“…Decreasing trends of TOC was observed in each reactor during the vermicomposting process shows the stabilization of organic matter substrate due to combined actions of earthworms and microorganisms. It has been reported that earthworms modify substrate conditions, which subsequently enhance the carbon losses from the substrate through microbial respiration in the form of CO2 [4]. TOC reduction of 22% to 31% was observed in each vermireactor (refer table 3).…”

Section: Maturity and Quality Of Vermicompost Produced From Vermireacmentioning

confidence: 89%

“…Initially electrical conductivity was (2.01 to 3.8) into all vermireactor and it was increased to (3.3 to 4.11 mS/cm). The increase in EC was due to loss of organic matter and release of mineral salts in available forms such as phosphate, ammonium, potassium etc [4]. Decreasing trends of TOC was observed in each reactor during the vermicomposting process shows the stabilization of organic matter substrate due to combined actions of earthworms and microorganisms.…”

Section: Maturity and Quality Of Vermicompost Produced From Vermireacmentioning

confidence: 95%

“…It is a bio-oxidative process in which earthworm and microorganism play joint role to convert organic waste into matured and stabilized vermicompost. Although microbes are responsible for biochemical degradation of organic matter, earthworms are important driver of the process by conditioning the substrate and altering the biological activity [4]. However the quality and time required for the vermicomposting depends on the composition of initial waste mixture being processed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vermicomposting of Flower Waste: Optimization of Maturity Parameter by Response Surface Methodology

Sharma¹,

Yadav²

2017

In the present study, response surface methodology (RSM) was used to develop an approach for the optimization of quantity of flower waste and cow dung to determine maturity during the vermicomposting of flower waste. The effect of maturity parameters such as C:N ratio, Germination index and CO2 evolution rate were studied using central composite design (CCD). Eisenia foetida was used in different combination of flower waste and cow dung during the vermicomposting of flower waste. Results of study showed significant effect of both variables and their interactions with process parameters during vermicomposting process. The optimum results obtained from response surface methodology was nearly equal between predicted and experimental analysis. The optimum variation of process parameter was pH 7.07-7.12, electrical conductivity 3.28 -3.42 mS/cm, total organic carbon 33.72-34.06%, C: N ratio 14-15, phosphorous 4.95-5.21 g/kg and potassium 13.99-14.31 g/kg. The results suggest that compost obtained from the vermicomposting of flower waste and cow dung contains sodium, potassium and phosphorous which are beneficial for the plant growth. Flower waste compost is suitable for organic manure which reduces the quantity of waste by converting into valuable products.

Env Prog and Sustain Energy

A review on vermicomposting of organic wastes

Ali

Sajid

Khalid

et al. 2015

Generation of the huge amount of solid waste around the globe is a major ecological and technical problem. Vermicomposting may be the viable option to handle solid waste in an environmentally friendly way. This review provides a general overview of viability of vermicomposting processes as an ecofriendly approach. The integrated approach of composting and vermicomposting processes provides better results. Further, to optimize the process of vermicomposting, codigestion of organic wastes provides better opportunity for both microorganisms and earthworms to convert the organic fraction of solid waste under controlled environmental conditions. Feeding, stocking density, pH, C/N ratio, temperature, and moisture, by inference, seem to be the critical factors that influence the vermicomposting process. Furthermore, the end product of vermicomposting, the nutrient‐rich compost, could be used for biogas production. Hence, the management of solid waste and energy production can be achieved at the same time with no further costs. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1050–1062, 2015