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Sparging can refer to injecting gas into a liquid or squirting liquid onto a solid. Injecting gas is used for carbonated drinks, water treatment, and extending the shelf life of foods. Spraying a solid with liquid is used in brewing to wash sugar from the grain. Different objects can be used for these processes, and careful consideration of temperature and pressure is necessary for brewing.
Sparging is a technical term generally recognized to have two meanings. First, it can refer to a process of injecting gas into a liquid. Examples of this type of sparging include carbonated drinks and water treatment. Secondly, sparging can refer to the act of squirting liquid onto a solid. A good example when referring to the word in this sense is the brewing process.
The first type of sparging, which involves injecting gas into a liquid, is commonly used for many purposes. One product that people are familiar with that is made this way is a soft drink or soda. Such a drink is often classified as a carbonated drink. That’s because it’s made from a liquid that’s been injected with carbon dioxide, which causes its fizz.
Water can also be treated through this process. Air sparging is a groundwater remediation technique. It involves adding oxygen to contaminated water and soil, thus aiding the decomposition of contaminants. Treating water with ozone works in much the same way. The ozone is pumped into a water supply and the bacteria are destroyed when it comes into contact with the gas.
Another use for this type of sparging is to extend the shelf life of foods. This is done by injecting bubbles of nitrogen into items such as oils and mayonnaise. Nitrogen removes most of the oxygen. If oxygen was left in those products at high levels, the products won’t last long.
The gas injected during the sparging process is often forced through a porous object. The size of the pores is important, as it helps control the size of the bubbles produced. For example, when fine bubbles are needed, gas is forced through an object with very small holes. Finer bubbles are often more effective and can save processing time.
There are several objects that can be used for these types of processes. These include porous metal aerators, diffusers and spargers. Each can have advantages and disadvantages depending on what it is used for.
The second definition involves spraying a solid with a liquid. This process is often used in brewing. It refers to the spraying of the grains after the wort has run off. The sweet, unfermented product resulting from the mashing of the grains is the wort.
In this case, sparge refers to using water to wash the sugar from the grain. This is not an ill-advised task. There are several processes for sparging beer. You may need to consider both water temperature and water pressure. Otherwise, the flavor of the beer could be negatively affected.
