Why correct glycol disposal procedure is important

Glycol from a pressure relief valve (PRV) must be disposed of properly because it is regulated waste and cannot be disposed of on the ground or down drains. The type of glycol (propylene or ethylene), the degree of contamination, and local laws all affect the particular disposal technique.

Important steps for glycol disposal

Contain the glycol: In a closed system, the PRV discharge should end in an appropriate, properly labelled, and sealed container made for chemical waste, usually a special “glycol discharge bottle.”

• Determine the type of glycol and Any Contaminants: Ascertain whether the fluid is ethylene glycol (which is more toxic) or propylene glycol (which is less toxic) and check for contamination. This information, usually available in the product’s Safety Data Sheet (SDS), influences its classification as either hazardous or non-hazardous waste. The presence of contaminants can elevate a non-hazardous status to hazardous.
  
• Avoid pouring into drains: Never dispose of glycol in sinks, storm drains, or on the ground, as this can lead to water supply contamination, harm aquatic life, and result in penalties.
  
• Locate a licensed disposal facility or recycler: use a licensed hazardous waste disposal service or a specialised recycler.

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