In the manufacture of beverages, food and pharmaceuticals, depth and surface filters are commonly used. Depth filtration forces liquids through a random pattern of channels in filter media in order to trap particles. Depth filtration often functions as rough or primary filtration, because it removes larger particles before they reach finer pleated and membrane filters, extending the life and freshness of “downstream” filtration surfaces.

Surface filtration uses a thin porous material to capture particles, allowing clarified liquid to flow through. Bag filters are examples.

Depth Filters for Solid Removal and Adsorption

Depth filters remove high levels of contaminant including particles, submicron particles, colloidal material, and soluble material, as fluid travels through a complex, meandering path. String wound and melt blown filters are examples of depth filters.

Surface Filters for Clarification and Sterilization

Bag filters are examples of surface filters. Two important areas for bag filtration are at the source or introduction of water and ingredients, and downstream, where the product is exposed to risk.

Reliable filtration requires the appropriate efficiency and micron size in the right location. A micron rating refers to the particle size that a filter is designed to catch. Efficiency defines the percentage of capture in that micron range. Consider both factors in your filter selection.

Particles vary in size and shape, so it’s wise to test out and refine the type of filter elements that will be most effective for your application. Other considerations for your filter media include:

  • Capacity and retention
  • Filter life and performance
  • Flow rates

We can help you understand and follow regulatory best practices, map out a filter replacement schedule, and analyze your processes for potential areas of improvement.

Don’t Overlook Wash Water Filtration

The filtration of bottle and barrel washing water are frequently overlooked. Proper filtration of wash water is especially important when pasteurization is not part of the process, because micro-organisms from poorly filtered water can recontaminate non-pasteurized products. That’s why wash water should be filtered as carefully as the product itself. ¹

End-to-End Filtration for Safety and Quality

Every factory operates differently and has different needs. Think about water supply, contaminants and microorganisms, product texture and taste, product shelf life and safety, productivity and sustainability. Surface Matics can help you figure out the best filtration system, specifically for your operation.

¹https://www.sciencedirect.com/topics/engineering/depth-filter
https://www.newfoodmagazine.com/article/89676/water-treatment-industry-work/
https://www.watertechonline.com/wastewater/article/14214347/zero-liquid-discharge-a-myth-or-necessity-for-food-and-beverage-companies
https://www.pharmamanufacturing.com/articles/2012/143/
Depth filters and surface filters are used in beverage manufacturing.
Filtration Catalog