【作者】 王亚楠； 曾运航； 周建飞； 石碧；

【Author】 WANG Ya-nan;ZENG Yunhang;ZHOU Jianfei;SHI Bi;National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University;Key Laboratory of Leather Chemistry and Engineering(Sichuan University),Ministry of Education;

【机构】 制革清洁技术国家工程实验室(四川大学)； 皮革化学与工程教育部重点实验室(四川大学)；

【摘要】 以实现污染物的源头控制为目标,开发了基于酶作用的制革准备工段清洁集成技术。首先用荧光示踪技术探究了酶在脱毛和软化工序中的传质特性和作用机理,证实了脱毛酶主要作用于表皮层和粒面层而导致脱毛,这也是纯酶脱毛易损伤粒面的主要原因;软化酶的快速渗透和均匀作用能够显著改善软化效果。以上述理论为指导,开发了产品质量稳定、易控的酶辅低硫少灰保毛脱毛技术,废水COD、硫化物和悬浮物等污染物负荷分别降低了53%、82%和93%;开发了效果可媲美铵盐助软化的无氨软化技术,从源头消除了氨氮的产生。应用该脱毛-软化清洁集成技术,所得成革的物理和感观性能等均与常规成革相当。更多还原

【Abstract】 Integrated cleaner beamhouse processes based on enzyme action was developed to minimize pollution from the origin.The mass transfer characteristics and action mechanisms of enzymes in unhairing and bating processes were investigated using fluorescence tracing.The removal of hair depends on the action of unhairing enzyme on epidermis and grain layers.This was the main reason that enzymatic unhairing causes damage to grain.In addition,the rapid penetration and uniform action of bating enzyme could significantly improve the bating performance.Based on the above theories,an enzyme assisted low-sulfide hair-save unhairing technology was developed.This process was safe and easy to control,with high quality of finished leather.COD,sulfide and SS in the wastewater were reduced by 53%,82%and93%,respectively.A non-ammonia bating technology was also developed.Its bating performance was comparable to that of conventional bating using ammonium salts.Meanwhile,ammonia nitrogen in bating wastewater was eliminated from the origin.Leather made by the integrated cleaner beamhouse processes exhibited comparable physical and organoleptic properties to conventional ones.更多还原