黄姜综合利用关键技术研究.docVIP

黄姜综合利用关键技术研究 摘 要 本研究应用循环经济理论和清洁生产原理，引进先进的加工工艺及设备，通过实验室小试及中试生产试验验证，实现了黄姜加工的资源化利用和清洁生产。 所开展的工作及取得的结论或成果包括以下几个方面： 1. 黄姜淀粉和纤维素的提取 以传统提取红薯淀粉的方法为基础，经历了手工提取分离，实验室提取分离和机械法提取分离三个阶段，完成了黄姜中淀粉和纤维素提取分离的研究，最终优选确定了针磨，带式压榨，沉降式卧螺离心，气流烘干等设备使纤维素、淀粉、皂素三者完全分离和提取，纤维与木质素回收率达到85%～90%，淀粉回收率达90%左右，皂素损失在2％以下。 2. 黄姜浆料的膜浓缩 采用膜浓缩技术减少了进入水解过程的浆料量，从而降低用酸量和废水排放量。通过实验室规律性研究和中试生产试验验证，通过膜浓缩，可以将浆料浓缩57倍，使固形物含量达到7%。与传统工艺相比，酸解物料量减少了50%。 3. 黄姜废水的资源化利用 酸解废水酸性大，糖度高，生化性差是导致废水处理成本高的重要原因，本实验将酸解废水通过加入石灰乳中和酸度，得到石膏产品，每吨废水可回收利用二水石膏95 kg。废水经中和回收石膏后采用抗污染膜进行浓缩回收水解糖，浓缩倍数可达到十倍，每吨废水可回收水解糖100 kg。分离出的清水通过二级ESPA1膜处理，COD值仅为30.5 mg/L，达到了国家一级排放标准，可以循环利用。 4. 经济可行性分析 采用黄姜资源化利用技术后，90%以上的淀粉和纤维素得到了回收利用大幅度减少了酸解物料量和耗酸量，降低酸解废水的浓度和数量，提高皂素回收率，从源头治污，实现了资源多元化综合利用，每年可为年产100吨皂素企业增加564万元的综合经济效益，创造了显著的经济效益，环境效益和社会效益。 RESEARCH ON THE KEY TECHNOLOGY OF RESOURCE UTILIZATION FOR DIOSCOREA ZINGIBERENSIS C.H.WRIGHT ABSTRACT Based on the cycle economic theory and clean production principle, the resource utilization and clean production of Dioscorea zingiberensis C. H. Wright processing was achieved by imported processing and verified by equipments lab experiment and Pilot production. The conclusions and achievements were summarized as follows: 1. Starch and cellulose extraction of Dioscorea zingiberensis C. H. Wright Based on traditional method of sweet potato extraction, the starch and cellulose of Dioscorea zingiberensis C. H. Wright were extracted through three stages, manual, laboratory and machinery extraction separation. The mulling, belt-pressing, centrifuging and gas flow drying equipments, by which the cellulose, starch and disogenin could be completely extracted and separated, were finally determined. The recovery rate of cellulose and lignose reached 85- 90%, and that of starch was about 90%. And the loss rate of disogenin was under 2%. 2. Membrane concentration of Dioscorea zingiberensis C. H. Wright slurry The hydrolization slurry amount was reduced by adopting membrane concentration technology and thus the adding amount of aci