Executive Summary
Nigeria is the largest aquaculture producer in sub-Saharan Africa, yet its fish feed sector remains heavily import-dependent. In 2024, the country imported between 300,000 and 400,000 metric tons of fish feed and ingredients annually, spending over $1.2 billion to bridge a demand gap of approximately 2.4 million metric tons. A mid-sized aquafeed mill in Ogun State, southwestern Nigeria, sought to replace imported floating extruded feed with locally manufactured alternatives for catfish (Clarias gariepinus) and Nile tilapia (Oreochromis niloticus) farming operations. After evaluating multiple equipment suppliers, the mill selected the Hongyang SZLH series ring die pellet mill integrated with a post-extrusion conditioning system. Within six months of commissioning, the facility achieved a sustained production capacity of 3.5–4 metric tons per hour, pellet durability index (PDI) above 96%, and a water stability rating exceeding 6 hours for floating pellets. Feed conversion ratios (FCR) reported by downstream customers improved from an average of 1.8:1 to 1.4:1 compared to imported commercial feed. This case study examines the technical rationale behind the equipment choice, production outcomes, and the tangible economic benefits realized by the Nigerian feed mill.
## 1. Nigeria’s Aquafeed Landscape: A Market Under Pressure
Nigeria’s animal feed market reached approximately 15.18 million metric tons in 2024, with aquafeed representing one of the fastest-growing segments. The country’s aquaculture output is driven by catfish—accounting for roughly 70% of farmed fish production—and tilapia, which has seen accelerated adoption in cage culture systems across Ogun, Lagos, and Delta states.
Despite this growth, domestic fish feed production capacity has lagged behind demand. The National Institute for Freshwater Fisheries Research (NIFFR) has documented that local feed mills manufacture only around 1.2 million metric tons annually against a total requirement exceeding 3.6 million metric tons. The shortfall has historically been filled by imports from Morocco, Mauritania, Brazil, and European suppliers such as Skretting and Aller Aqua.
The macroeconomic environment has intensified the urgency for local substitution. Between mid-2024 and early 2025, the Nigerian Naira depreciated by approximately 50% against the US dollar, directly inflating the landed cost of imported feed by an estimated 30–50%. By late 2025, a standard 15 kg bag of imported floating feed retailed for approximately ₦42,000—a price point that rendered intensive aquaculture operations economically unviable for many small and medium-scale farmers.
This pricing crisis created both a challenge and an opportunity for local feed manufacturers: invest in capable pelletizing equipment to produce floating extruded feed at competitive cost, or lose market share entirely.
## 2. Equipment Selection Rationale: Why Ring Die Over Alternatives
The Ogun State mill operator evaluated three technological pathways for floating fish feed production:
Technology Capital Cost Operating Cost Pellet Quality Suitability for Nigeria
— — — — —
Single-screw extruder (imported) Very high High (spare parts) Excellent Low—long lead times, FX exposure
Local flat-die pellet mill Low Low Inconsistent buoyancy Moderate—high wastage, low throughput
Ring die pellet mill + post-conditioning Moderate Moderate High (with proper conditioning) High—robust, serviceable, proven
The operator selected the ring die pathway for three decisive reasons. First, ring die pellet mills operate at higher throughput per kilowatt-hour than flat-die alternatives, with capacities scaling from 1 to 20 metric tons per hour depending on die dimensions and motor rating. Second, a well-engineered ring die with appropriate compression ratio and steam conditioning can achieve gelatinization levels sufficient to produce floating pellets without a dedicated expander—a significant capital saving. Third, the availability of locally serviceable components such as dies, rollers, and bearings was critical in a market where imported equipment downtime routinely extends to weeks due to customs clearance and logistics bottlenecks.
The Hongyang SZLH ring die pellet mill, equipped with a 160 kW main motor, stainless steel conditioner, and a ring die with a compression ratio of 1:8.5 optimized for floating aquafeed formulations, was selected after the manufacturer provided formulation-specific die testing using Nigerian raw material samples—including local soybean meal, groundnut cake, and cassava starch binder—at their Liyang testing facility.
## 3. Production Performance and Pellet Quality Metrics
Commissioning took place in September 2025, with full production ramping up by November. The key performance indicators recorded over the subsequent four-month monitoring period are summarized below:
Metric Target Actual (4-Month Average)
— — —
Throughput (metric tons/hr) 3.0 3.6
Pellet Durability Index (PDI) ≥95% 96.4%
Water Stability (floating, hours) ≥4 hrs 6.2 hrs
Bulk Density (kg/m³) 450–500 472
Pellet Sinking Rate <5% at 30 min 2.8%
Energy Consumption (kWh/ton) ≤45 42.3
Die Service Life (tons before replacement) 8,000 On track—2,400 tons through with <0.3 mm wear
The PDI result of 96.4% is particularly significant for floating aquafeed. High durability reduces the generation of fines during pneumatic conveying, bagging, and transport—fines that would otherwise sink immediately upon pond application, contributing to feed waste and water quality deterioration. The water stability exceeding 6 hours ensures that pellets remain intact and buoyant throughout the typical catfish feeding window, allowing farmers to visually monitor consumption and adjust feeding rates.
Feed conversion ratios reported by 12 downstream farms tracked by the mill averaged 1.4:1 over a full grow-out cycle, compared to 1.8:1 for the imported extruded feed previously used. At prevailing feed costs, this improvement translates to approximately ₦112,000 in feed cost savings per ton of fish harvested—a decisive competitive advantage for the farmers.
## 4. Economic Impact and Customer Feedback
The shift from imported to locally manufactured floating feed delivered three compounding economic benefits:
1. Feed cost reduction: The mill’s ex-factory price per 15 kg bag was approximately ₦28,000, 33% below the landed cost of imported alternatives at ₦42,000.
2. Supply chain reliability: Lead times collapsed from 6–8 weeks (import cycle) to 48 hours (local delivery). Farmers could order feed on demand rather than maintaining costly buffer stocks.
3. Formulation flexibility: The mill could adjust protein levels and ingredient composition based on seasonal raw material availability—incorporating higher proportions of groundnut cake during harvest season and shifting to soybean meal when prices favored it—without compromising pellet physical quality.
The mill’s production manager, interviewed after the first quarter of operation, noted: “We had tried two other machines before. One could not maintain pellet buoyancy beyond two hours; the other broke down every three weeks. The Hongyang machine has run for four months with only scheduled maintenance. Our customers say the feed stays on the water and the fish eat more aggressively.”
## 5. Conclusion
The Nigerian aquafeed market is at an inflection point. Rising import costs, a depreciating currency, and growing aquaculture output are collectively forcing the industry toward local feed manufacturing. The Ogun State case demonstrates that a properly specified ring die pellet mill—configured with formulation-matched die geometry, adequate steam conditioning, and robust post-pellet handling—can produce floating catfish and tilapia feed at commercial scale, with quality metrics that meet or exceed imported alternatives.
For Hongyang, the Nigerian installation reinforces the company’s track record in markets where equipment resilience, local serviceability, and formulation adaptability are as critical as nominal throughput figures. The mill’s sustained performance over multiple production cycles confirms that the SZLH ring die platform is well-suited to the challenging operating environments and diverse raw material profiles characteristic of West African feed production.
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Data references: Nigeria animal feed market volume figures from Research and Markets (2025); fish feed import statistics and pricing from The Nation Newspaper and industry reports on Nigeria’s aquaculture sector; feed conversion data reported by the mill’s downstream customer survey, December 2025–March 2026.
Post time: Jun-12-2026
