Understanding Tank Vent Filtration in the Bottled Water Process

Tank vent filtration is a filtration system designed to prevent contaminants from entering the water storage tanks used in bottled water production. It involves the use of specialized filters installed on tank vents to capture and remove airborne impurities, such as dust particles, bacteria, and volatile organic compounds (VOCs), that could compromise the quality and safety of the water. Tank vent filters must be properly sized to not hinder airflow, in order to maintain pressure equilibrium and prevent storage tank damage.

Importance of Tank Vent Filters

• Preserving Water Quality: Airborne contaminants such as dust, bacteria, and VOCs can adversely affect the quality of water by introducing unwanted tastes, odors, or impurities. Tank vent filters act as a barrier ensuring only clean air enters storage tanks.
• Maintaining Product Consistency: Products that taste and look the same are crucial in the bottled water industry. Tank vent filters can minimize variations in water resulting in a reliable and satisfying customer experience.
• Compliance with Regulations: Bottled water is subject to strict regulatory requirements and quality standards. Tank vent filters help production meet these requirements set by regulatory authorities.

Benefits of Tank Filters

• Enhanced Safety: With a reduced risk of bacteria and VOCs, consumers can trust that the water they are drinking is safe and the plant can trust it will meet regulations
• Extended Shelf Life: By preventing contamination it helps prolong the shelf life of the bottle, preserving freshness and ensuring quality over time.
• Reduced Production and Equipment Costs: Airborne contamination can lead to costly product recalls and can also damage downstream equipment. Without vents, product storage tanks would implode or explode due to pressure changes.

Key Tank Vent Filter Requirments

• Particle and Microorganism Removal: Tank vent filters should effectively capture and remove dust, airborne debris, bacteria, viruses, and volatile organic compounds. High particle and high microbial filtration efficiencies are key to preventing the contamination of bottled water.
• Airflow Capacity: Need to have a sufficient airflow capacity to meet required ventilation and airflow rates for tanks. Ensure it does not cause excessive pressure drops or flow restrictions as either could damage storage tanks.
• Longevity and Durability: Should have a long service life and be resistant to wear and tear. The filters should be able to withstand environmental conditions and maintain their filtration efficiency over an extended period without frequent replacements.
• Compliance with Regulations: Must meet regulatory requirements and standards set by relevant authorities, such as the Food and Drug Administration (FDA) or other local regulatory bodies. Ensure that the selected filters comply with these regulations to ensure the safety and quality of the bottled water.
• Compatibility with Existing Systems: Tank vent filters should be compatible with the existing ventilation systems and tank designs used in the bottled water production facility. Consider the compatibility aspects to ensure seamless integration and proper functioning of the filtration system.

Recommended Tank Vent Filters

Global Filter recommends two different types of membrane filters for tank vent filtration in bottled water production.