利用薯渣生产柠檬酸钙,然后加工成柠檬酸,其原料广泛、设备简单、投资少见效快,非常适宜于农户及乡镇企业采用。其原料配制是将干薯渣粉碎过筛后,100kg 原料对水85kg,并加入氮源辅料。氮源辅料如用硫酸铵,其用量为薯渣重量的0.7%,如用尿素则为0.4%,如用米糖或麦麸则为10%或16%。然后将曲料搅拌均匀后,即上蒸锅蒸煮1h,以杀死杂菌。在菌种制备上,所选用菌种为宇佐美曲霉 C2B3,开始先接种在麦芽汁、洋葱培养基上培养3—4d,然后接入扩大培养基(配制方法:麸皮5kg、碳酸钙0.5kg、硫酸钙5g、加水5—5.5kg,拌匀 The use of potato residue production of calcium citrate, and then processed into citric acid, a wide range of raw materials, simple equipment, quick investment ineffective, very suitable for farmers and township enterprises. The preparation of raw materials is to crush the dried potato shredded, 100kg of raw water 85kg, and add nitrogen source materials. Nitrogen source materials, such as the use of ammonium sulfate, the amount of 0.7% by weight of potato residue, such as 0.4% with urea, such as with rice bran or wheat bran then 10% or 16%. Then stir the material, then steamed cooking 1h, to kill bacteria. In the strain preparation, the selected strain as Aspergillus kawachii C2B3, the beginning of the first inoculation wort, onion medium 3-4d, and then access to expand the medium (preparation method: bran 5kg, calcium carbonate 0.5kg, Calcium sulfate 5g, add water 5-5.5kg, mix well