The Secrets of Beer Filtration System

When it comes to production, achieving a clear and polished appearance is often desired. One way to accomplish this is through the use of beer filter systems. These systems help stabilize the beer and remove unwanted elements, such as dead , that could affect the taste and appearance of the final product. In this article, we will explore the different types of beer filter systems available and discuss their benefits.

There are two main techniques used in beer filtration: surface filtration and cake filtration. Surface filtration involves passing the beer through layers of filter material to remove impurities. This method is commonly used in large-scale breweries and can result in a highly clarified beer. On the other hand, cake filtration involves the formation of a filter cake on the surface of the filter material. This cake traps particles and helps to achieve a clearer beer.

Before delving into the specifics of beer filter systems, it's important to note that filtering a beer before bottling is generally not recommended. Filtering can strip the beer of some of its natural flavor and character, and can also remove beneficial yeast that can contribute to the beer's development over time. However, if you are concerned about having a cloudy beer, there are alternative methods, such as using beer finings, that can help clarify the beer without the need for filtration.

For those who are kegging their beer, filtering can be a viable option to achieve a clear and visually appealing product. When choosing a beer filter system, one of the key considerations is the micron rating of the filter. A 0.35 micron nominal filter is often recommended for removing the majority of yeast from the beer, with up to 90% removal at 0.4 micron and 10% removal at 1.2 micron. It's important to note that using a finer filter, such as a 1 micron absolute filter, will result in slower filtration and is not typically recommended for bottling beer.

In addition to achieving a clear appearance, beer filter systems can also help stabilize the beer. Removing impurities, such as dead yeast, can prevent off-flavors from developing and extend the shelf life of the beer. This is particularly important for commercial breweries that need to ensure consistency and quality in their products.

When it comes to choosing a beer filter system, there are a variety of options available on the market. From cartridge filters to plate and frame filters, each system has its own advantages and considerations. It's important to carefully evaluate your specific needs and budget before making a decision.

Beer filter systems can be a valuable tool for achieving a clear and visually appealing beer. While filtering before bottling is generally discouraged, kegging brewers may find it beneficial to invest in a filter system. By understanding the different filtration techniques and micron ratings, brewers can make an informed decision that aligns with their goals and needs. Cheers to a well-filtered and delicious brew!

Beer Filtration System 1695290172

Should I Filter Beer Or Not?

Filtering beer is a topic that often sparks debate among brewers. The decision to filter or not to filter ultimately depends on personal preference and the desired outcome for the beer. Here are some key points to consider when deciding whether or not to filter your beer:

1. Clarity: Filtering beer can help achieve a crystal-clear appearance by removing any sediment or particles that may be present. If having a visually clear beer is important to you, then filtering can be a good option.

2. Flavor: Some brewers argue that filtering beer can strip away certain flavor compounds, resulting in a beer that may be perceived as slightly less flavorful compared to an unfiltered version. However, this effect is often minimal and may not be noticeable to most consumers.

3. Mouthfeel: Filtering can also affect the mouthfeel of the beer. By removing certain proteins and yeast cells, filtered beer can have a smoother and lighter mouthfeel. However, this may not be desired for certain beer styles where a fuller body is preferred.

4. Shelf stability: Filtering beer can enhance its shelf stability by reducing the presence of yeast and other microorganisms. This can help prevent off-flavors and extend the beer's overall shelf life. If you plan to store your beer for an extended period or distribute it commercially, filtering can be beneficial.

5. Time and equipment: Filtration requires additional time and equipment. It can be a more labor-intensive process, as you need to set up and clean the filtration system. If you are on a small scale or simply prefer a less complicated brewing process, then filtering may not be necessary.

Filtering beer is not necessary for homebrewers, especially if you are kegging your beer. However, if you desire a visually clear beer, improved shelf stability, and have the time and equipment to do so, then filtering can be a viable option. Ultimately, the decision to filter or not to filter should be based on your personal preferences and the desired characteristics of the final product.

What Does A Beer Filter Do?

A beer filter serves multiple purposes in the brewing process. It plays a crucial role in stabilizing and enhancing the appearance of beer. Here are some key functions of a beer filter:

1. Clarification: The main objective of a beer filter is to remove any suspended particles or solids present in the beer. These particles can include yeast, proteins, hop debris, or other unwanted sediments. By passing the beer through a filter, these impurities are effectively removed, resulting in a clearer and visually appealing beer.

2. Polishing: In addition to clarification, filtration helps to polish the beer, giving it a professional and finished look. This is especially important for beers that are intended to be crystal clear, such as lagers or light-colored ales. The filter aids in removing any haze or cloudiness, resulting in a bright and attractive appearance.

3. Stability: Filtration also plays a vital role in improving the stability of beer. By removing unwanted elements like dead yeast cells, bacteria, or other microorganisms, the filter helps prevent spoilage and maintain the beer's flavor and quality over time. This is particularly important for beers that are intended for a longer shelf life or for commercial distribution.

4. Control of flavor and aroma: While filtration primarily focuses on physical clarification, it can also have a subtle impact on the flavor and aroma of the beer. Some compounds or hop oils that contribute to the beer's taste and aroma can be filtered out to a certain extent. Brewers carefully consider the desired balance between clarity and flavor when deciding on the filtration process.

5. Efficiency in packaging: Filtration can assist in packaging beer more efficiently. By eliminating particulate matter, the beer is less likely to clog or damage the filling equipment. This ensures a smoother and more efficient packaging process, reducing the risk of contamination or product loss.

A beer filter is a crucial tool in the brewing industry. It helps achieve a clear and visually appealing beer while also improving its stability and enhancing the overall drinking experience.


The beer filter system plays a crucial role in stabilizing and enhancing the appearance of beer. While filtering before bottling is generally not recommended, it can be beneficial for those who desire a clear and polished beer. The two main techniques employed in beer filtration are surface filtration and cake filtration, both of which effectively remove unwanted elements such as dead yeast.

When selecting a beer filter, it is important to consider the micron rating. A 0.35 micron nominal filter is highly effective in removing yeast from the beer, while a 1 micron absolute filter is also available but may take longer to filter and is not recommended for bottling purposes.

By utilizing a beer filter system, brewers can ensure the longevity and palatability of their beer, as well as achieve a desirable appearance. Whether kegging or bottling, filtering can be a valuable tool in the brewing process, providing a clear and visually appealing final product.

Photo of author

Thomas Ashford

Thomas Ashford is a highly educated brewer with years of experience in the industry. He has a Bachelor Degree in Chemistry and a Master Degree in Brewing Science. He is also BJCP Certified Beer Judge. Tom has worked hard to become one of the most experienced brewers in the industry. He has experience monitoring brewhouse and cellaring operations, coordinating brewhouse projects, and optimizing brewery operations for maximum efficiency. He is also familiar mixology and an experienced sommelier. Tom is an expert organizer of beer festivals, wine tastings, and brewery tours.