The skill of Italian Coffee Mechanism in making Coffee Water softening
Picture: Qingdao Xiumen Coffee-Laoshan Store (East Tel:6778.8860, 2km Road, south of Yangkou Tunnel, Binhai Avenue)
When the espresso machine is installed, a set of water treatment system is usually installed, which mainly includes two steps, purification and softening.
Purification, also known as filtration, is sometimes three-stage filtration.
Softening is scientifically defined as the process of removing calcium and magnesium ions from water.
The Italian coffee maker uses softened water.
1. Softened water Softened Water
That is, the calcium and magnesium ions have been removed and the water has changed from "hard" to "soft".
two。 The "soft" and "hard" of water-- hardness
Hardness is a term used to describe the content of calcium and magnesium ions in water.
The hardness of 1 degree is equivalent to 1 liter (L) of water containing 10 mg (mg) of calcium oxide.
Hardness less than 8 degrees is called soft water.
A hardness higher than 17 degrees is called hard water.
A hardness between 8 and 17 is called moderately hard water.
Rain, snow, rivers and lakes are all soft water, while springs, deep wells and sea water are all hard water.
Completely different standards are used in industry, and water with only 10 hardness in industry is also called high hard water.
3. Reasons for using "soft water"
To put it simply, it is to reduce the formation of scale and reduce the formation of scale in the coffee machine boiler.
Usually, scale will form on the inner wall of a hot kettle after it has been used for a period of time. The reason for the formation of scale is that the water contains inorganic salts, which are usually invisible to the human eye, but after heating and boiling, the "calcium" and "magnesium" ions in them form carbonates that are insoluble in water.
The softening of water is the removal of "calcium" and "magnesium" ions. If the culprit of the scale is gone, the scale will naturally be gone.
4. The principle of softening
Softening is usually carried out by resin ion exchange.
The general principle is that when water passes through the resin, the sodium ions contained in the resin replace calcium and magnesium ions. See the formula:
Calcium removal:
CaCO3+2Na-R=Ca-R+Na2CO3
Ca (HCO3) 2+2Na-R=Ca-R+2NaHCO3
Removal of magnesium:
MgCO3+2Na-R=Mg-R+Na2CO3
Mg (HCO3) 2+2Na-R=Mg-R+2NaHCO3
(the above content is organized according to the content of Baidu)
Source: Qingdao Xiumen Coffee blog
- Prev
How to drink coffee to lose weight?
Even for coffee lovers, the convenience of a fully automatic coffee machine is commendable. At present, there are many high-quality fully automatic coffee machines on the market, of which the $300 (about 1861 yuan) Breville Grind Control is a very recommended choice. It has an adjustable grinder that can cook up to 12 cups of coffee at a time. If
- Next
Interpretation of Common problems of espresso
Italian concentration can be a way of extraction, it can be a drink. As a way of extraction, Italian concentration is the most frequent contact with the public and the most familiar to ordinary consumers. Perhaps because it is too familiar, it gives rise to the most doubts. TX, who has just started to learn coffee, the most common doubts are as follows: 1. Espresso beans: mixed beans? Single
Related
- What is the meaning of lactic acid fermentation with coffee bean treatment?
- How to judge the state of foam by sound?
- How does the latte pull out the unicorn pattern? Come to get for a little trick to improve the flower pull!
- Will flower pulling affect the taste of the latte?
- Do you know the history of coffee?
- The difference between honey treatment and sun washing what is raisin honey treatment?
- What kind of milk can a novice use to make coffee foam to keep the foam longer? The correct method and skills of milking tutorial sharing
- Why do washed coffee beans taste sour? Flavor characteristics of washed Coffee
- Introduction to the skill of how to practice the size and height of water injection around the circle of hand-brewed coffee
- How do beginners practice coffee flower drawing from scratch?