Determination of beer fermentation by carbon dioxide detector

                     Carbon dioxide is one of the main by-products in beer fermentation. According to the detection of carbon dioxide detector, the theoretical calculation of each 1kg maltose fermentation can produce 0.514 tons of carbon dioxide, and each 1kg glucose fermentation can produce 0.489 tons of carbon dioxide.Due to the beginning of the fermentation of impure carbon dioxideemissions, carbon dioxide dissolved in part of the wine, the actual recovery of carbon dioxide is usually 45% to 70%, the empirical data is after the recovery of 25-27 kg.

The influence factors of carbon dioxide measured by carbon dioxide detector were analyzed.Through the same sake can, the same filling condition, the same measuring device, the same operator's condition, to the different concentration, the different specifications of a large number of finished beer at any time detection found that the influence factor is diverse, this different factor for its production should do a certain degree of control.

, when the carbon dioxide content in beer is measured in carbon dioxide detector instrument measurement value will not only as the change of pressure, at the same time for the change in temperature is obvious, as the temperature rise is distribution, determination of carbon content in beer values increased with the increase of measured sample bottleneck air volume down.

When nitrogen is used as the backup pressure gas, the content of bottleneck air will be very high, and the influence on the measured value of carbon dioxide detector is much more obvious than that when carbon dioxide is used as the backup pressure gas.Temperature control is the most important. Choose a constant temperature water bath pot with high precision and strictly control the temperature of beer water bath (25 ± 0.1℃) and time (20-30min) to ensure the accuracy of the measurement results of carbon dioxide detector.

                     The pressure control of the sample is also very important. During the measurement process of carbon dioxide detector, the valve should be controlled so that the gas flow cannot be too large. Otherwise, a large amount of gas will be emitted, resulting in incomplete reaction of carbon dioxide and alkali liquor, resulting in a low final result.At the same time, wait until the liquid level is completely still before reading the static volume of air in the bottleneck.If the bottleneck air volume is high after the first air discharge, the operation must be repeated 2-3 times.