The primary challenge associated with coco coir lies in its high salinity (manifested as elevated EC values); relying solely on mechanical dewatering cannot remove these salts, which would otherwise adversely affect its performance in subsequent agricultural cultivation. Consequently, specialized processing techniques employ a comprehensive treatment strategy: an initial "water-washing and desalination" phase, followed by "high-pressure dewatering."
**Uniform Spreading and Pre-dewatering:** The coco coir is conveyed to a spreading unit, where it is distributed uniformly across a filter screen to undergo preliminary gravity-assisted dewatering.
**Spray Desalination (Core Differentiating Advantage):** A spraying mechanism is positioned either immediately before the material enters the high-pressure zone or during its entry. Through a series of nozzles, the spread-out coco coir is thoroughly rinsed with clean water; this process dissolves water-soluble salts—such as potassium, sodium, and chlorides—contained within the coir, flushing them away with the water flow to achieve highly efficient desalination.
**Multi-stage High-Pressure Roller Dewatering:** The desalinated, wet coco coir then enters the high-pressure dewatering zone, which consists of multiple sets of opposing pressure rollers. Upper and lower filter belts sandwich the material, guiding it along an "S-shaped" path as it sequentially passes around a series of rollers with progressively decreasing diameters. As the pressure gradually increases through each stage, the vast majority of the moisture—including the water introduced during the spraying process—is forcefully squeezed out of the material.
**Discharge:** The entire process concludes with the discharge of the coco coir "filter cake"; this cake is characterized by low moisture content and low salinity, making it ready for immediate use in subsequent drying, packaging, or direct application.
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