Wheat & Soybean Cooperative Storage — Iowa, USA

Project Summary

The challenge: As a rapidly expanding agricultural cooperative serving over 180 member farms across central Iowa, the organization faced mounting pressure to modernize its grain handling infrastructure. With annual throughput exceeding 25,000 tonnes of wheat and soybeans combined, the cooperative's aging concrete silos could no longer meet the demands of a growing membership base or the increasingly stringent quality requirements of premium domestic and export buyers. The core challenge was twofold: first, the cooperative needed to store wheat and soybeans in separate, clearly segregated lots — each further divided by grade parameters including protein content, test weight, moisture level, and dockage — to preserve identity and maximize market value. Second, the facility had to handle an intense, concentrated intake season where member deliveries could peak at over 800 tonnes per day during the six-week harvest window, creating severe bottlenecks at existing receiving pits and causing costly truck queues that stretched onto public roads. The cooperative also struggled with inconsistent grain quality at intake, as field-damaged kernels, fines, and foreign material accumulated in storage, restricting airflow through the grain mass and leading to hot spots, spoilage, and quality downgrades that triggered member complaints and contractual disputes with end buyers.

Our solution: Manxing designed and delivered a purpose-built 12,000-tonne grain storage facility engineered specifically for the cooperative's dual-crop, multi-grade operational model. The system centers on six flat-bottom storage bins, each with a nominal capacity of 1,500 tonnes, configured in a linear arrangement to maximize site utilization while maintaining adequate clearance for equipment access and future expansion. These bins feature heavy-gauge galvanized steel walls with 60-degree cone-bottom hoppers to promote mass flow and minimize residual grain during emptying, and each is equipped with a full-floor aeration system delivering 1/10 CFM per bushel for wheat and 1/5 CFM per bushel for soybeans, managed by variable-speed fans controlled by ambient temperature and humidity sensors. For seed wheat and high-value food-grade soybean lots requiring absolute identity preservation and zero cross-contamination, Manxing supplied two dedicated hopper-bottom bins with 60-degree steep slopes, full-pitch flight augers, and sealed discharge gates that enable complete cleanout between lots — a critical requirement for maintaining certified seed purity and meeting food-safety audit trails. At the heart of the facility, a Manxing distributor tower integrates a network of gravity spouts, diverter valves, and a centrifugal intake leg capable of receiving 150 tonnes per hour, routing each delivery to the correct bin based on crop type, grade classification, and moisture reading captured at the inbound weighbridge. Upstream of the bins, a two-stage cleaning system comprising a rotary scalper and an aspiration channel removes broken kernels, chaff, weed seeds, and dust before grain enters storage, reducing dockage levels from an average of 2.8% down to below 0.5% and dramatically improving the uniformity of the stored grain mass. Temperature monitoring cables suspended from the bin roofs provide real-time thermal mapping of the grain mass, feeding data to the cooperative's management software so operators can trigger aeration cycles or arrange targeted out-loading before any quality deterioration occurs.

The outcome: Since commissioning, the facility has transformed the cooperative's ability to serve its members and compete in premium grain markets. Grade segregation is now fully operational across all eight bins, allowing the cooperative to offer 12 distinct wheat and soybean grade categories — up from just three previously — and to capture price premiums averaging $0.15 per bushel for identity-preserved, quality-verified lots. The intake cleaning system has reduced foreign material content to consistently below 0.5%, which has improved aeration efficiency by an estimated 35%, lowered energy consumption for grain cooling by approximately 22%, and virtually eliminated hot-spot incidents that previously caused an average of 1.2% annual storage losses. During the first full harvest season, the facility processed over 28,000 tonnes with zero truck turnaround delays exceeding 30 minutes, compared to the previous average wait time of over two hours. Quality claims from end buyers dropped by 68% year-over-year, and the cooperative reported a 15% increase in member deliveries as farmers who had previously diverted grain to competing facilities returned due to the improved speed, transparency, and quality outcomes. The seed-specific hopper bins have also enabled the cooperative to enter the certified seed market, generating a new revenue stream projected to contribute over $200,000 annually.

Project at a Glance

Equipment Provided

Grain Bins

Accessories

Grain Cleaning & Grading

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Project Timeline

Results

• ✓ Since commissioning, the facility has transformed the cooperative's ability to serve its members and compete in premium grain markets. Grade segregation is now fully operational across all eight bins, allowing the cooperative to offer 12 distinct wheat and soybean grade categories — up from just three previously — and to capture price premiums averaging $0.15 per bushel for identity-preserved, quality-verified lots. The intake cleaning system has reduced foreign material content to consistently below 0.5%, which has improved aeration efficiency by an estimated 35%, lowered energy consumption for grain cooling by approximately 22%, and virtually eliminated hot-spot incidents that previously caused an average of 1.2% annual storage losses. During the first full harvest season, the facility processed over 28,000 tonnes with zero truck turnaround delays exceeding 30 minutes, compared to the previous average wait time of over two hours. Quality claims from end buyers dropped by 68% year-over-year, and the cooperative reported a 15% increase in member deliveries as farmers who had previously diverted grain to competing facilities returned due to the improved speed, transparency, and quality outcomes. The seed-specific hopper bins have also enabled the cooperative to enter the certified seed market, generating a new revenue stream projected to contribute over $200,000 annually.
• ✓ Delivered on schedule with full commissioning
• ✓ 12,000 tonnes total storage capacity

"The segregation capability is exactly what our members needed. Intake is fast and simple."

Sarah Johnson — Cooperative Manager

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