Many biomass plant owners face headaches with wet agricultural waste. Crop stalks, rice husk, corn cobs and straw often carry high moisture after harvest. If you feed this wet material directly into pellet or briquette machines, you will get broken pellets, low output and frequent machine blockages. Proper moisture reduction and pretreatment are critical to turn damp farm waste into qualified solid fuel.

First, assess the actual moisture of your raw materials. Fresh agricultural waste can easily hit 35% to 60% moisture. For pellet making, the target range should be 12–15%. For briquette production, 10–18% works better. Simple field drying is the most cost-effective choice when weather permits. Spread the waste thin on dry ground and turn it regularly to speed up evaporation. But natural drying relies heavily on weather, so it cannot be the only solution all year round.

When rainy seasons come, mechanical drying becomes necessary. A biomass dryer is the reliable option for large-scale factories. You need to control drying temperature carefully. Overheating will burn the fiber and reduce fuel value, while insufficient drying leaves too much water inside. Match the feeding rate and hot air flow, so materials come out with stable moisture. Before drying, shred big stalks into small, uniform pieces. Small particles dry faster and more evenly, avoiding pockets of trapped wet material.

Another point many people overlook is storage. After drying, do not let materials re-absorb moisture. Store treated agricultural waste in covered, ventilated warehouses. Seal stock piles properly and check moisture level regularly before sending materials into production lines.

You should also adjust your forming process accordingly. Even after drying, leftover moisture variations can affect pressing. Test small batches first. If material is still slightly wet, lower feeding speed and check die pressure.

Handling high moisture agricultural waste well directly cuts production failure and improves final fuel quality. A good combination of natural drying, mechanical drying and proper storage helps factories run steadily and produce consistent biomass fuel all year.