Post-harvest processing is where harvested cannabis and hemp material is prepared for its next stage of production. Drying, trimming, sizing, and milling all play a role in creating a consistent material stream for extraction, formulation, or other downstream processes.
Choosing the right mill is an important part of that process. The ideal equipment depends on the material being processed, the desired particle size, production requirements, and the characteristics you need to preserve.
Start With Your Material
Cannabis and hemp materials can vary considerably depending on the plant, harvest conditions, moisture content, and processing method.
Post-harvest materials may include:
- Dried flower
- Trim
- Biomass
- Hemp flower
- Stalks and other plant material
These materials don’t necessarily behave the same way during size reduction. Resin content, moisture, fiber content, and feed size can all affect milling performance.
Before selecting equipment, it’s important to understand the physical characteristics of the material entering the mill.
What Particle Size Do You Need?
The desired finished particle size should be one of the first considerations when selecting a mill.
Some applications may require a relatively coarse grind, while others benefit from a finer, more uniform particle size. The appropriate target depends on what happens to the material after milling.
For example, a consistent particle size can help create more predictable material for downstream extraction or processing. Producing an unnecessarily fine grind, however, can increase energy consumption and potentially generate additional heat.
The right mill should provide the particle size your process requires, not simply the smallest particle size possible.
Moisture Content Matters
Moisture content can significantly influence how cannabis and hemp materials behave during size reduction.
Material that is too moist may be difficult to process efficiently, while excessively dry material can create different handling and processing considerations.
Maintaining consistent feed conditions helps produce more predictable milling results. If your post-harvest material varies from batch to batch, the mill and operating parameters may need to accommodate those changes.
Consider Your Throughput Requirements
Production volume is another important factor.
A small laboratory or development operation may need only a few pounds per hour, while commercial processing can require significantly higher throughput. Selecting equipment based on today’s production requirements alone may also limit future growth.
KannaMill offers multiple equipment configurations designed to accommodate different processing scales, from laboratory and pilot applications through production-scale processing.
The goal is to match mill capacity to the actual process, not to purchase significantly more equipment than necessary or create a bottleneck as production increases.
Temperature and Material Characteristics
Cannabis and hemp materials can contain valuable compounds that make temperature management an important consideration during processing.
Mechanical size reduction generates heat, and the amount of heat produced can be influenced by factors such as material properties, feed rate, screen size, and mill operating conditions.
For applications where temperature control is especially important, cryogenic milling may be an option worth evaluating.
KannaMill equipment can be configured for cryogenic processing, helping manufacturers address applications where maintaining material characteristics during size reduction is a priority.
Cleaning and Process Considerations
Post-harvest processing equipment should also fit into the overall manufacturing environment.
Easy access to components, appropriate materials of construction, and equipment designed with cleaning and maintenance in mind can simplify routine operation.
For manufacturers operating within controlled production environments, equipment should also support established quality and sanitation procedures.
KannaMill equipment is manufactured to support cGMP processes, providing a foundation for controlled and repeatable size reduction within cannabis and hemp processing operations.
Choosing the Right Mill for Your Process
There is no single mill configuration that is right for every post-harvest application.
When evaluating equipment, consider:
- Material type and characteristics
- Moisture content
- Desired particle size
- Required throughput
- Temperature sensitivity
- Batch or continuous processing
- Cleaning and maintenance requirements
- Downstream processing requirements
- Current and future production needs
A Better Approach to Post-Harvest Size Reduction
Post-harvest milling is more than simply reducing plant material to a smaller size. Consistency, temperature management, throughput, cleanliness, and downstream processing requirements all need to be considered when selecting equipment.
KannaMill provides purpose-built size reduction solutions for cannabis and hemp processing, with equipment configurations designed to support applications ranging from laboratory development through commercial production.
Need help selecting the right mill for your post-harvest application? Talk with KannaMill about your material, particle-size requirements, and production goals.