This project features a complete production line integrating pre-drying, fermentation, secondary drying, and crushing/packaging, employing a segmented processing technology tailored for high-moisture distillery grain waste. The core technology utilizes a double-stage, three-pass rotary drum dryer. The first-stage pre-drying reduces the moisture content of the waste from 60% to 35%. After microbial fermentation to increase protein content, the second-stage drying precisely controls the temperature to reduce the moisture content to 12%. The equipment boasts high thermal efficiency, low energy consumption, automated continuous operation, uniform drying, and a nutrient retention rate exceeding 88%, while meeting environmental standards.
Compared to traditional single-stage drying, which directly dries high-moisture waste (around 60% moisture content) to the target value (below 12%), resulting in high heat consumption and low thermal efficiency, the segmented process reduces the moisture content to the suitable fermentation range (around 35%) during pre-drying. The heat generated by microorganisms during fermentation reduces the heat demand for secondary drying, resulting in overall energy savings of 25%-30% compared to traditional processes.
After drying, the distiller's grains are rich in crude protein and probiotics, making them a high-quality raw material for premium livestock and poultry feed and aquatic bait. They command a significant market premium, align with green farming policies, and enable the high-value utilization of waste.
