| 摘要 |
- 45 Attorney Docket No. 11 198US01 TANNING PROCESS WITH REDUCED WASTE DISCHARGE Abstract A tanning process reduces discharges of liquid waste, solid waste and gaseous waste. By virtue of liquid waste recycling, the process reduces solid material digestion or decomposition, and coverts wastes to reusable materials. Liquid waste and solid waste are also reduced. Chemical material volatilization is also reduced, which helps to reduce gaseous waste discharge. The liquid waste recycling procedures are implemented independently in the steps of waster soaking, liming, re-liming, de-liming and softening, pickling and chrome tanning, degreasing, re-tanning, neutralizing and dyeing. The process reduces water consumption by more than 70%, and reduces energy consumption by more than 20%. In addition, the process reduces solid waste discharge by over 70%, thereby saving 15% to 100% of chemical materials, as well as reducing air pollution caused by chemical material volatilization. The process significantly improves leather quality. + Water soaking liquid wast Fresh water -i Water soaking Filtering + Solid waste 1 Waste recycling +* Liming liquid waste Fresh water - 1 Liming a Filtering + Solid waste - Waste recycling Fresh water Re-liming] Re-liming liquid waste Fresh water - De-liming and De-liming and softening liquid waste Softening |
