一、用辣蓼曲发酵饲料提取“七○二”: 每100斤饲料加200斤水,浸泡5分钟,加热(保持90℃)一个小时,在加热过程中,加36%的烧碱三斤,边加边搅拌,再用纱布过滤,滤出的溶液就是“七○二”。二、用酒糟提取“七○二”,方法完全同上。三、用老面(即酵面)接麦麸水提取“七○二”: First, the spicy Polygonum song fermented feed extraction “702”: 100 kg of feed plus 200 pounds of water, soak for 5 minutes, heated (to maintain 90 ℃) an hour, during the heating process, add 36% cassava three pounds, While adding edge mixing, then gauze filtration, the solution is filtered out “702.” Second, the use of distiller’s grains to extract “702”, the method is exactly the same as above. Third, with the old noodles (ie, yeast) pick the wheat bran extract “702”: