Minimization of the Environmental Impact of Leather Processing: A Benign and Enzyme-based Integrated Leather Processing Technology
Traditional leather processing posed great threat to the environment due to its numerous do-undo procedures and use of tremendous amount of chemicals,especially toxic reagents such as sulfides,lime,ammonium salts,etc.To minimize the pollution loads and avoid using unsafe substances in leather manufacturing,an enzyme-based dehairing and fiber opening,silicate pretreating,liming-deliming-bating free chrome tanning and post-tanning integrated leather processing technology has been achieved using biocatalysts for goatskins under slight basic condition.It has been found that the extent of hair removal,opening up of fiber bundles and shrinkage temperatures of crust leather are comparable to that produced by traditional methods.Scanning electron microscopic analysis,determination of physical-mechanical properties and organoleptic evaluation further verify that performance of the leathers is on par with conventionally processed leathers.Most important is that,reductions in water consumption,wastewater discharge,COD and TS loads are in the order of 60％ when compared to conventional leather processing.Thus,the developed leather manufacturing technology offers immense potential for greener production of skins and hides to leather coupled with environmental excellence.
Cleaner production Enzyme-based processing Sodium silicates pretreating Integrated processing technology
Wei XU Lifen HAO Qiufeng AN Lei ZHOU
Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry,Ministry of Education,Sha Technical Center for Safety of Industrial Products of Tianjin Entry-Exit Inspection and Quarantine B
国际会议
哈尔滨
英文
1614-1618
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）