基于海水制备蓝湿革工序的污染分析初步探究

Study on the Pollution Analysis of Preparing Wet-blue Process Based on Seawater

通过对海水和工业水制备蓝湿革的不同工序产生废液中的不同污染物含量进行对比,并经加权处理后衡量制革工序的环保性能。结果发现,除了氯离子外,其他污染物含量均未有明显的改变;从工序综合评价上看,海水预浸水、浸灰、脱灰和软化工序具有更好的环保性能,而海水浸酸、铬鞣工序的生态性能相对较差,但均能满足工艺要求,且污染物含量处于正常的范围。海水制革废液中的氯离子含量约为一般工业水制革废液中氯离子含量的3倍,这与海水本身具有较高的氯离子含量有关;但海水制革过程中水体中增加的氯离子含量低于工业水制革,仍体现了较好的工艺生态性能。这意味着海水制备蓝湿革是可行的,尤其是海水更适合用于浸水、浸灰、脱灰、软化等制革前处理工序,这为减少制革工艺的淡水使用量,合理利用海水资源提供了一种新可能。

By comparing the pollutant content in the waste liquid generated from different processes of preparing wet-blue from seawater and industrial water,the environmental performance of the tanning process was measured after weighted treatment.The results showed that there is no significant change in the content of other pollutants except for chloride ions;from the comprehensive evaluation of the process,soaking,liming,deliming,and softening by seawater have better environmental performance,while pickling and chrome-tanning by seawater have relatively poor ecological performance,but all can meet the process requirements,and the pollutant content is still within the normal range.The chloride ion content in tannery wastewater by seawater is about three times that of general tannery wastewater by industrial water,but this is related to the high chloride ion content of seawater itself.However,the increased chloride ion content in water during the process of seawater tanning is lower than that in industrial water tanning,which still indicates that seawater tanning has better process ecological performance.It is suggested that the preparation of the wet-blue by seawater is feasible,especially for pre-treatment processes such as soaking,liming,deliming and softening,which provides a new possibility for reducing the use of fresh water and making rational use of seawater in the tanning process.