The Phase 1 hub is sized to match cultivation supply with digester demand — all harvested azolla feeds CBM production. But azolla is also 25–30% protein by dry weight and its digestate is a rich nitrogen fertilizer. As DM-XTech scales to multiple hubs, cultivation capacity can flex toward poultry feed, aquaculture supplement, and biofertilizer markets where commercially attractive. These are optional secondary markets, not built-in surplus — but at scale they represent meaningful additional value and a partial displacement of the Philippines' ₱1.5 billion annual soybean meal import bill.
Azolla at 25–30% crude protein (dry weight) can replace 20–30% of conventional soya-based protein supplement in broiler and layer diets. Studies across Asia report comparable or improved growth rates and feed conversion ratios. Fresh azolla can be fed directly without drying.
Indicative value: ₱12–18/kg fresh weight delivered to poultry farms.
Azolla is well-documented as a duckweed/fern supplement for tilapia, catfish, and milkfish aquaculture in the Philippines. It can be broadcast directly into fish ponds or mixed into pellet feed. The high amino acid profile (essential amino acids present) supports fish growth comparably to commercial protein concentrates.
Indicative value: ₱8–12/kg fresh weight for direct pond broadcasting.
Digester effluent from Azolla digestion is an excellent liquid biofertilizer: rich in plant-available nitrogen (from the fixed N₂), phosphorus, and micronutrients. Applied back to the leased cultivation paddies it cycles nitrogen locally; surplus volumes can be sold to surrounding rice and vegetable farms as a synthetic-fertilizer replacement.
Indicative fertilizer cost offset: ₱3,000–₱5,000/ha/yr for recipient farms (see Add-on F below for hub-scale quantification).
Revenue diversification note: The base case financial projections in this document model DM-X CBM fuel sales only. Azolla feed sales and biofertilizer income represent additional revenue streams that improve project economics beyond the base case — they are not required for loan serviceability but represent meaningful upside as the system scales into Phase 2 replication hubs and beyond.
The Philippines has a second major agricultural import dependency that receives far less public attention than fuel — but is structurally almost identical in its vulnerability. Soybean meal is the primary protein ingredient for Philippine poultry, layer, aquaculture, and pet-food industries. The country produces essentially none of it domestically, and imports are forecast to grow year on year. Any feedstock that can partially substitute for imported soybean meal addresses a real gap in national agricultural resilience.
For azolla to substitute for any meaningful share of imported soybean meal, it has to perform nutritionally — against the criteria feed formulators actually measure. This section documents azolla's crude protein, essential amino acid profile, digestibility by species, and practical inclusion rates, side by side with soybean meal and other common feed protein sources.
| Feed | Crude protein |
Lysine (% of CP) |
Methionine (% of CP) |
Threonine (% of CP) |
|---|---|---|---|---|
| Azolla pinnata | 25–30% | 4.5% | 1.8% | 3.5% |
| Soybean meal (48% CP) | 48% | 6.3% | 1.4% | 3.9% |
| Fish meal | 60–65% | 7.5% | 2.8% | 4.2% |
| Corn (maize) | 8–10% | 2.8% | 2.1% | 3.7% |
| Napier grass | 8–10% | 3.5% | 1.2% | 3.0% |
| Rice straw | 4–5% | 2.5% | 1.0% | 2.8% |
Anaerobic digestion does not destroy nitrogen — it conserves and mineralises it. The nitrogen that Anabaena azollae fixed from atmosphere during cultivation remains in the digester effluent, now in its most plant-available form (ammonium). For a standard 50 Nm³/h CBM hub, this represents a meaningful secondary nitrogen stream that can be cycled back to cultivation paddies or sold to adjacent rice and vegetable farms.