Comparative Analysis of Biodegradable Biomaterial Capsules for Ecological Restoration of Degraded Areas: An Expanded Technical and Economic Feasibility Study of Thirteen Viable Materials

Ecological restoration of degraded areas requires innovative, cost-effective, and environmentally sustainable solutions. This expanded study presents a comprehensive comparative analysis of biodegradable capsules manufactured from thirteen viable biomaterials—including wool, cotton, coconut fiber, rice husks, sugarcane bagasse, sisal, poultry feathers, wheat straw, corn stover, coffee husks, cocoa shells, banana fiber, and peanut shells—for seed encapsulation and soil rehabilitation applications. We evaluated physical properties (water retention 78-312%, decomposition rates 2-48 months, structural integrity), chemical composition (C:N ratios 3.1-126:1, pH 5.8-8.2, nutrient content), biological effects (microbial activity stimulation 95-162% of control, germination rates 76-94%), and economic feasibility (production costs USD 0.05-18.50/kg, material availability, scalability). Results indicate that material selection must be strategically matched to environmental conditions and restoration objectives. Wool capsules demonstrate superior long-term performance in arid environments (312% water retention, 12-24 month decomposition), while agricultural residues (wheat straw USD 0.05/kg, corn stover USD 0.08/kg, coffee husks USD 0.10/kg) enable ultra-low-cost large-scale restoration. Coconut fiber emerges as the most versatile option, combining near-wool water retention (289%) with widespread tropical availability and competitive costs (USD 0.65-3.80/kg). Coffee and cocoa processing residues demonstrate exceptional C:N ratios (18-20:1) and nitrogen content (2.5-2.8%), providing rapid nutrient release. Hybrid formulations combining complementary materials achieve 75-98% of wool performance at 2-34% of wool cost, with the Premium formulation (45% coconut + 25% banana + 20% cocoa + 10% feathers) surpassing wool performance (IPM 94.7 vs 94.1) at only 17% of the cost. This research provides a comprehensive technical framework with material selection matrices for diverse climatic zones, degradation types, and economic contexts, enabling evidence-based selection of optimal biomaterials for capsule-based ecological restoration projects worldwide. Textile Waste Valorization Through Biodegradable Capsule Production for Ecological Restoration: Comprehensive Technical and Economic Feasibility Analysis of Recycled Natural Fiber Clothing Paper Link: https://doi.org/10.5281/zenodo.17971266 Organic Waste as a Catalyst for Tropical Forest Restoration: A Comprehensive Analysis of the Guanacaste Orange Peel Experiment Paper link: https://doi.org/10.5281/zenodo.17957848