A lot should be considered when you plan to find your micro brewery like brew tech,micro brewery configuration,microbrewery equipment cost and price,find a location for micro brewery, license and regulation of beer machine. This article column is specially to answer some common question during brewing.
What is the function of adding gypsum or calcium chloride to mash?
Adding gypsum or calcium chloride to the mash has a significant effect on improving the water quality of brewing water and preventing the pH rise of mash caused by carbonate hardness. Reasonable use has no adverse effect on the quality of beer, and the cost is low. It is a common method to improve the water quality in beer production. The main functions of adding gypsum or calcium chloride are as follows (taking gypsum as an example)
(1) Eliminating alkalinity of HCO3 and CO3
Ca2++2HCO3→→CO2↑+CaCO3++H2O
CaSO4+NaCO4→→CaCO3↓+NaSO4
(2) The elimination of alkaline gypsum from K2HPO4 can change alkaline dihydrogen phosphate into acidic dihydrogen phosphate, but at the same time, calcium phosphate precipitation will be formed, reducing part of soluble phosphorus Acid salts.
4K2HPO4+3Ca(PO4)↓+2KH2PO4+3K2SO4
(3) Adjust the concentration of calcium ion in water. When the concentration of calcium ion in brewing water is lower than 30mg / L, gypsum can be added to adjust.
(4) To promote enzyme reaction, adding gypsum or calcium chloride can not only improve water quality, but also promote a variety of enzyme reactions in the process of saccharification. For example, Ca2 + and C can increase the activity of a-amylase. In addition, this method is an important means to adjust the reasonable proportion of ions and improve the flavor of beer.
The amount of gypsum and calcium chloride can be calculated according to the following relationship: for every 0.18mmol/l increase in non carbonate hardness, 24g gypsum (without crystal water) or 20g calcium chloride (without crystal water) should be added to each ton of water.
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