Ensilaged Marigold Flower Dewatering Screw Press

Ensilaged Marigold Flowers Dewatering

Marigold flowers are widely used in the extraction of lutein, a natural pigment valued for its applications in poultry feed additives, nutraceuticals, and cosmetics. However, due to their seasonal nature and high perishability, marigold flowers are often ensilaged—a preservation technique in which the fresh flowers are fermented under controlled anaerobic conditions. While this allows year-round utilization, the resulting ensilaged mass is heavy, fibrous, and high in moisture, making it challenging to process further without proper dewatering.

Nature of the Material

The ensilaged marigold material has undergone partial fermentation, leading to a dense, semi-decomposed, and moist composition. The moisture content typically exceeds 75–80%, with significant bound and absorbed water due to the flower’s fibrous cellular structure. The fermentation also makes the mass slightly acidic and slippery, which needs to be considered during material handling and pressing.

Preprocessing & Feeding

The ensilaged material is generally stored in pits or silos and manually or mechanically fed into a hopper or conveyor system. In most applications, no shredding is required, as the fermentation softens the structure adequately. However, material flow aids may be needed depending on storage density and compaction.

Dewatering Using Screw Press

Our Dewatering Screw Press is designed to effectively handle this type of fibrous and partially fermented biomass. The high-torque, slow-speed screw press ensures consistent throughput and superior dewatering performance.

Key Process Highlights:

Input Moisture: Typically 75–80%
Output Moisture: Reduced to 55–60%, depending on variety and ensilage condition
Volume Reduction: Substantial—helping downstream operations such as drying or pigment extraction
Press Configuration: Open frame design with provision for washing and corrosion-resistant construction due to slight acidity of material

The press also breaks down any residual clumps, allowing for more uniform drying or extraction in subsequent steps.

Downstream Applications

Drying: The semi-dry output can be fed into rotary drum dryers or flash dryers for further moisture reduction before pigment extraction.
Lutein Extraction: The reduced moisture improves extraction efficiency and reduces the solvent load in chemical or supercritical CO₂ extraction methods.
Composting: Pressed marigold biomass can also be used for organic manure or composting, offering a sustainable alternative to disposal.

Key Benefits

Handles tough, fibrous, and semi-fermented biomass with ease
Significantly reduces drying load and improves processing efficiency
Enables round-the-year processing of seasonal marigold crops
Customizable based on pH resistance and capacity requirements
Robust design suitable for continuous operation

By integrating our Dewatering Screw Press into the marigold processing line, producers can drastically improve yield efficiency, cut down drying and solvent costs, and maintain a continuous, efficient, and scalable production process for lutein or other bioactive compounds.

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