Integrating AFS Remediation Cartridges into Your Closed-Loop System

Plug-and-Play Purity: Optimizing Your Closed-Loop System with AFS Cartridge Filter Remediation

Successfully remediating color, heavy metals, or pesticides requires a combination of high-grade adsorbent media and precise operational execution. By following this guide, your lab can maximize the contact time between the solvent and the media, ensuring that the "clean" cannabinoids are separated from "dirty" pesticide/heavy metals or discolored compounds.

1. Pre-Run Preparation: Understanding the Flow

Before installation, verify your system’s flow direction. AFS cartridges are designed to work within a Color Remediation Column (CRC) or a dedicated remediation housing situated between the extraction column and the collection vessel.

• Solvent Ratio: For optimal color and compound removal, we recommend a higher solvent-to-biomass ratio (typically 8:1 or 10:1). Remediation often requires more solvent to be effectively pulled through the media bed without clogging.
• Temperature Control: While color remediation often performs best at cryogenic temperatures, heavy metal and pesticide remediation can sometimes benefit from slightly warmer temperatures (around -20°C to -40°C) to increase the solubility of certain target compounds, depending on the specific situation.

2. Installation Steps

The AFS "Plug-and-Play" design eliminates the need for manual packing, which is the primary cause of "channeling" (when solvent bypasses the media).

1. Inspect the Seals: Ensure the hermetically sealed 2.5um filter paper on both the top and bottom of the cartridge is intact.
2. Seating the Cartridge: Drop the cartridge into your PTFE-compatible housing. Ensure the cartridge is seated firmly against the bottom gasket of your housing to prevent "blow-by."
3. Pressure Check: Once the housing is sealed, perform a standard pressure test with nitrogen to ensure there are no leaks in your hardware.

3. The Remediation Run: Key Parameters

To ensure the media captures the color, heavy metals, or pesticides listed in our proven database, you must manage the flow rate.

• Residence Time: Do not rush the solvent through the cartridge. Adsorption is a surface-area-dependent process. A slow, steady flow ensures the darker compounds and heavy metal and pesticide molecules have adequate time to "stick" to the AFS media recipe.
• Pressure Differential: Monitor the gauges on both sides of the remediation column. A sudden drop in pressure might indicate channeling, while a significant spike may indicate that the media is saturated or the oil is too thick.

4. Post-Run and Verification

Once the extraction is complete, the AFS system makes the most difficult part of the job—cleanup—the easiest.

• Recovery: Ensure all solvent is recovered from the remediation housing using a nitrogen push to "squeeze" the remaining cannabinoids out of the media.
• Safe Disposal: Because the AFS cartridge fully encapsulates the media, you can remove the spent cartridge without creating a cloud of silica or clay dust. Dispose of the cartridge according to your local regulations especially for any hazardous waste (since it now contains concentrated heavy metals or  pesticides).
• Testing: Always send a sample of the remediated oil to a third-party lab for a Heavy Metals, "Pesticide Suitability", or full compliance test to verify the batch is clean before further processing.

Troubleshooting Common Issues