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Value added product recovery from sludge generated during gum arabic refining process by vermicomposting.
Environmental Monitoring and Assessment 2016 September
Gum arabic is multifunctional and used in food products, pharmaceutical, confectionery, cosmetic, printing and textile industry. Gum arabic has an excellent market and its production is being increased to meet the market demand. In the process, huge quantity of solid waste is generated during its refining process. An attempt has been made to vermicompost this organic waste using Eudrilus eugeniae. This research work is first of its kind. Literature on this substrate has not been reported anywhere else for vermicomposting. Results were excellent with volatile solid reduction of 51.34 %; C/N ratio reduced to 16.31 % indicating efficient loss of carbon as carbon dioxide during vermicomposting period. Manurial value, i.e. nitrogen, phosphorus and potassium content in the range, required for the plants also increased. Porosity of 67.74 % and water holding capacity of 65.75 % were observed. The maturity of the vermicompost was evaluated through scanning electron microscopy wherein the complete conversion of large raw material particles into finer particles forming a uniform matrix with more surface area was observed indicating its efficient conversion. Microbial quality of vermicompost was also studied. The final vermicompost is free of fungal cells and pathogenic bacteria.
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