What Is Nitro Beer? – How to Nitrogenate Beer
With an unlimited number of alcoholic beverages available to beer enthusiasts worldwide, brewers are always on the lookout for the next breakthrough in delivering a more pleasant drinking experience. Using nitrogen gas for food, such as nitrogen for modified atmosphere packaging, nitro cold brew coffee, and nitro beer have become very popular as of late.
Traditionally, most beers are infused with carbon dioxide (CO2) to create a lively bubbly finish. However, some distillers are replacing CO2 with nitrogen to create a different perspective on their favorite draughts.
What Is Nitro Beer?
Nitro beer is beer that is finished using nitrogen instead of carbon dioxide. A nitrogen-infused beer has a smoother, creamier look and taste largely due to the smaller gas bubbles produced when it interacts with beer. These characteristic effects are because nitrogen is largely insoluble in liquids and as such gives the person sampling a nitro beer a “heavier” mouth feel.
Carbonation vs. Nitrogenation
There are pros and cons to completing a brewery process with either carbonation or nitrogenation. On one hand, we have carbonation which is a longstanding traditional approach to beer making. Carbonation creates a brew with larger bubbles offering a lively, coarser feel on the tongue. By contrast, a nitrogen beer setup results in a brew with smaller bubbles than a carbonated one.
The debate between experts on which process creates the superior beer is unlikely to conclude any time soon. If properly done, either method will result in a superb drink with consumers rating based on subjective expectations of how a beer should look, and what it should taste like.
How to Nitrogenate Beer
By combining a mix of nitrogen and CO2 under elevated pressure, brewers can create a nitro beer. Compared to carbon dioxide, nitrogen is highly resistant to dissolution and this property is exploited to obtain a beer with high keg pressure but low carbonation. Depending on the beer type being nitrogenated, the applied pressure is varied. For a stout, about 8 psi of pressure is sufficient to nitrogenate the brew.
The cascading effect seen in a glass of nitrogenated beer is due to the varying rates of dissolution when interacting with the beer liquid. When served, the nitrogen gas bubbles are pulled down the sides of the glass while the CO2 bubbles rise through the middle. Further, the use of a restrictor plate placed in front of the faucet will form very small bubbles in the served beer giving it a thick, creamy head with a smoother, less acidic mouthfeel.
Gas Composition of a Nitro Beer
Nitro-beers typically have a gas composition of 70 percent nitrogen and 30 percent carbon dioxide. The absence of oxygen gas in Nitrogenated beers allows them to retain their flavors longer as oxidation is minimized.
Brewery Uses of Nitrogen
Nitrogen gas has become almost indispensable in the brewing industry as its use is integrated across various phases of the beer-making process. Some key uses of nitrogen gas in breweries are outlined below:
- Nitrogen flushing is done to eliminate gaseous impurities (carbon dioxide and oxygen) from brewery vessels inhibiting the onset of undesirable oxidative reactions
- Nitrogen purging will remove residual wort or mash from a previously brewed batch preventing them from oxidizing and ruining a fresh brew
- Pressurized nitrogen gas can serve as a transport medium pushing beer from one tank chamber to the other
- Nitrogen gas is used to pressurize kegs before transport, storage, or use
Where to Buy an Onsite Nitrogen Generator for Breweries
For large scale, long-term brewery operations, it is a smart business choice to invest in a nitrogen generator rather than depend on the use of nitrogen gas supplied via gas cylinders. However, purchasing an onsite nitrogen generation system should be given a fair amount of thought. It is advisable to purchase your onsite nitro brewery generator from a trusted source.
NiGen provides an impressive selection of nitrogen generators suited to all your brewery needs. If your brewery only has a temporary need for nitrogen generation, consider our nitrogen generator rental units before implementing nitrogen in your permanent process.
Benefits of Using Onsite Nitrogen Generator in Breweries
The foremost benefits of integrating nitrogen generators in breweries are a reduction in overall production costs, efficient gas usage with no wastage, and a reduction in downtime.
Lower Cost of Operation
Although the cost of purchasing and installing an onsite nitrogen generator might seem steep, in the long term it costs significantly less to operate when compared to the amounts spent on the gas supplied by cylinders
Efficient Gas Usage
The use of an onsite generator will allow operators to produce only the required amounts of the gas when needed. This boosts efficiency as all the gas produced is utilized in the associated processes without any waste. You can also select an onsite generator that delivers nitrogen purity grades to suit your exact application.
Reduction in Costly Delivery Downtime
Brewers operating with nitrogen supplied by gas cylinders might experience downtime where their production processes are halted due to supplier delays. Purchasing a nitrogen generator eliminates this problem as the required amounts of the gas can be generated around the clock without interrupting the production cycle.
NiGen Provides Reliable N2 Generators for Breweries
At NiGen, we offer the most efficient nitrogen generation systems and industrial air dryers suited for use in your brewery. Our nitrogen generator supply and installation services are designed to help cater to all your nitrogen gas requirements.