For small and medium-sized oilseed processing plants, selecting the optimal extraction method is one of the most critical decisions affecting both profitability and operational efficiency. Two dominant technologies—double pressing (secondary pressing) and single solvent extraction—offer distinct advantages depending on raw material type, production scale, and market demands. This article breaks down their technical differences, real-world performance metrics, and how to choose based on your specific needs.
| Criteria | Double Pressing | Single Solvent Extraction |
|---|---|---|
| Residual Oil Rate | ~3–5% | ~1–2% |
| Energy Consumption (kWh/kg oil) | ~1.8–2.2 | ~1.0–1.4 |
| Initial Equipment Investment | $150k–$300k | $250k–$500k |
| Best For Raw Materials | Peanuts, Sesame, Sunflower | Soybeans, Cottonseed, Rapeseed |
| Refining Complexity | Moderate (higher free fatty acids) | Low (cleaner extract) |
| Production Stability | High with continuous press like ZY24 | Very high but requires skilled operators |
These figures reflect typical values from verified installations across Asia, Africa, and Latin America. While solvent extraction achieves higher yield per ton of seed, it comes with greater complexity and upfront cost—a trade-off many smaller mills can’t afford.
In double pressing systems, consistent feed quality and mechanical reliability are non-negotiable. The ZY24 (202-3) spiral oil press has become a trusted workhorse in over 300+ small-scale operations worldwide due to its robust design, low maintenance, and ability to handle variable moisture content in peanuts or cottonseed without clogging.
One case study from Nigeria shows a peanut mill increasing daily throughput by 22% after switching from batch presses to a continuous ZY24 system. Their residual oil dropped from 6% to 4.2%, while energy use remained stable—an ideal balance for budget-conscious yet quality-driven producers.
If you're processing peanuts or sesame seeds and want to keep initial costs under $250k while maintaining good yields and clean output, double pressing with a reliable spiral press like ZY24 is your best bet. It’s also easier to train staff on, especially in regions where skilled labor is scarce.
However, if you’re targeting soybean or cottonseed markets where every percentage point of oil recovery counts—and you have access to trained technicians and steady electricity—solvent extraction makes sense long-term. Just remember: ROI usually takes 18–24 months to realize.
Whether you’re scaling up or optimizing an existing setup, understanding these core differences empowers smarter investment decisions. Don’t just follow trends—align your process with your goals.
See how this machine boosts efficiency, reduces waste, and delivers consistent results across diverse crops—without breaking the bank.
Learn More About ZY24 (202-3) Spiral Press
