Value added product recovery from sludge generated during gum arabic refining process by vermicomposting

Area of Science:

• Agricultural Science
• Environmental Science
• Biotechnology

Background:

• Gum arabic is a valuable natural gum with diverse industrial applications.
• Significant amounts of organic solid waste are generated during gum arabic processing.
• Sustainable waste management strategies are needed for this industrial byproduct.

Purpose of the Study:

• To investigate the vermicomposting of gum arabic processing waste using Eudrilus eugeniae.
• To assess the efficiency of the vermicomposting process and the quality of the resulting vermicompost.
• To establish a novel method for valorizing gum arabic waste.

Main Methods:

• Vermicomposting of gum arabic waste with the earthworm Eudrilus eugeniae.
• Analysis of volatile solids reduction and C/N ratio changes.
• Assessment of nutrient content (N, P, K), porosity, and water holding capacity.
• Evaluation of vermicompost maturity using scanning electron microscopy (SEM).
• Microbial analysis to determine the absence of pathogens.

Main Results:

• Achieved a volatile solids reduction of 51.34% and a C/N ratio reduction to 16.31%.
• Increased nitrogen, phosphorus, and potassium content, indicating enhanced manurial value.
• Observed high porosity (67.74%) and water holding capacity (65.75%).
• SEM confirmed efficient conversion into a uniform matrix with increased surface area.
• Final vermicompost was free from fungal cells and pathogenic bacteria.

Conclusions:

• Vermicomposting with Eudrilus eugeniae is an effective method for treating gum arabic processing waste.
• The produced vermicompost is a high-quality organic fertilizer with improved physical and manurial properties.
• This process offers a sustainable solution for gum arabic waste management and resource recovery.