Optimization of Vermicomposting Performance with Bagasse and EM-4: Implications for Organic Fertilizer Quality
Sakunda Anggarini*, Andreas Nelson Edoardo Simarmata, Irnia Nurika

Department of Agroindustrial Technology, Faculty of Agricultural Technology, Universitas Brawijaya
Jl. Veteran Malang, 65145
*Email : s_anggarini[at]ub.ac.id

Abstract

Improving the nutrient profile of vermicompost is essential for sustainable agriculture and reducing reliance on synthetic fertilizers. This study introduces an integrated approach using sugarcane bagasse and EM-4 bioactivator to enhance vermicomposting efficiency and meet the Indonesian National Standard (SNI) 7763:2018 for organic fertilizers. A factorial design with varying EM-4 concentrations (2-6%) and bagasse levels (12.5-50%) was applied to evaluate nutrient enrichment and compost maturity. The optimal formulation 6% EM-4 with 25% bagasse, substantially increased total Nitrogen, Phosporus and Potassium contents while reducing the C/N ratio. These results were surpassing SNI thresholds, outperforming control treatments and demonstrating clear improvements in organic fertilizer quality. This approach highlights a cost-effective and scalable method for waste valorization, converting agroindustrial residues into nutrient-rich vermicompost. The findings emphasize the role of sugarcane bagasse and EM-4 in producing high-quality organic fertilizers that support sustainable agriculture and advance environmentally responsible waste management within the circular economy principles.

Keywords: EM-4- Organic fertilizer quality- Sugarcane bagasse- Sustainable agriculture- Vermicompost- Waste valorization

Topic: Agricultural and bioprocess engineering