Modular black soldier fly bioconversion of spent peel into protein, lipid and frass

Overview

FreezeM, a black soldier fly (BSF) reproduction specialist, offers a modular on-site bioconversion solution that transforms spent peel — a high-volume, high-moisture waste stream from fruit processing — into three saleable outputs: insect protein meal, lipid, and stabilized frass soil amendment. The process uses BSF larvae to consume the moisture and soluble fraction of neutralized peel in situ, eliminating the need for energy-intensive drying or pressing that burdens conventional waste treatment.

The value proposition is threefold: new revenue from protein and lipid products, a high-quality fertilizer output, and reduced neutralization and disposal costs. Pectin-extraction peel is largely limonene-depleted, removing the usual barrier to citrus in insect diets and making the substrate especially well-suited to BSF bioconversion.

Technical specifications

Key features:

• Peel can form 50–70% of the larval diet at industrial feed conversion ratios
• Accepts the stream as-is at 75–85% moisture and pH 1.8–3.0, requiring only neutralization
• Batch variability in peel is handled as a recipe parameter through blending with protein- and starch-rich co-products
• Cellulose and hemicellulose fractions exit as stabilized frass fertilizer, not waste
• Modular 10–30 t/day sites built on proven Flybox rearing systems, avoiding mega-factory capex
• FreezeM supplies dosed neonates, so no breeding unit is needed on site

Development plan: Validation is staged across three phases — diet screening and larval trials (0–3 months), tonne-scale repeat runs and business case development (3–9 months), and a 12-month operating modular site with continuous recipe optimization (9–24 months).

Technology readiness level

The technology is at an early validation stage. Phase 1 bench-scale diet screening characterizes substrate variability (dry matter, pH, fiber, protein, sugars, minerals, nitrates, solvent residues) and runs larval trials at 0–40% inclusion against controls, measuring larval weight, feed conversion ratio, survival, and substrate mass and moisture reduction. A positive business case from tonne-scale runs gates progression to a 12-month operating modular site at a selected processing facility.