The production of monosodium glutamate (MSG) is generally divided into four main processes such as sugar production, glutamate fermentation, neutralization and extraction and refining.
First: MSG production generally adopts the dual-enzyme sugar production process of medium-temperature amylase or high-temperature amylase liquefaction, high conversion rate liquid saccharase saccharification. Enzymatic sugar process, especially the use of high-temperature amylase liquefaction of the new double enzyme sugar process, the starch - enzyme conversion rate and the quality of the sugar solution are higher than the previous acid process or acid enzyme process.
Secondly, the starch is liquefied by amylase to produce dextrin, which is then converted into glucose by saccharase. The product obtained from enzymatic sugar production can be called enzymatic sugar solution to distinguish it from hydrolyzed sugar solution such as acid method. Hydrolysis tank made of stainless steel with high mechanical strength, acid, alkali, long service time, but the cost is higher. Enamel hydrolysis tank (enamel lining) has the advantage of good corrosion resistance, resistance to concentrated hydrochloric acid and 150 ℃ high temperature, but the disadvantage is brittle, if the impact is easy to break and can not be welded on the enamel equipment.
Third: lined with acid-resistant tiles and acid-resistant rubber pressurized saccharification tanks have the advantage of withstanding greater pressure, heat, acid, mechanical strength is also good, the general factory can be hands-on construction, but the use of a long period of time, the tiles have detached phenomenon, it must be frequently checked and maintained. Fermentation flow plus sterile concentrated sugar will be sterilized sugar solution configured to culture well into the form of MSG.