酸解破乳作用处理高含固率洗毛废水的研究  

Demulsification of woolscouring effluent with high organic solid content through acidic hydrolyzation

作　　者：何锋[1] 周立祥[1] 王电站[1] 

机构地区：[1]南京农业大学资源环境学院环境工程系,南京210095

出　　处：《环境污染治理技术与设备》2006年第5期100-103,共4页Techniques and Equipment for Environmental Pollution Control

基　　金：江苏省自然科学基金重点资助项目(BK2004213);江苏省建设厅科技重点资助项目(JS2004ZB05)

摘　　要：洗毛废水是一种高浓度有机废水,含固率高,主要成分是羊毛脂、羧酸盐和土杂,由于强极性物质的存在和胶体强的负电性,导致洗毛废水形成稳定的乳化体系。本试验通过加入硫酸改变洗毛废水的有机组成,降低体系的Zeta电位,破坏体系的稳定性,从而使得有机物发生凝聚沉降,达到去除COD的目的。硫酸加入量达到0.2%或以上时对洗毛废水中SS的自然沉降性、絮凝性和极性有很大影响,比阻从远大于9.81×1013m/kg,下降为5.54×1010m/kg,COD去除率达到86.8%,SS去除率达到98%。因此,洗毛废水加酸处理后通过机械脱水,实现固液分离,以降低原废水的色度和大幅降低COD的方式,是可供考虑的处理工艺。Woolscouring effluent containing a great amount of lanolin, suint and dust is an organic wastewater with a high concentration of COD and SS. In this study, sulfuric acid was added into woolscouring effluent with an aim to reduce the polarity and Zeta potential of suspended organic colloid, resulting in organic colloid to agglomerate and sedimentate. It was showed that COD and SS of woolscouring effluent could be removed easily by mechanical dewater procedure when the amount of H2SO4 added to the wastewater was more than 0.2% and maintained in the system for 2 h at 60℃. After treated, woolscouring effluent had a good spontaneous sedimentation and dewaterability, as indicated by lower resistance rate of SS with 5.54×10^10 m/kg. The highest removal rates of COD and SS are 86.8% and nearly 100% , respectively.

关 键 词：酸解作用 破乳 洗毛废水 COD 去除 

分 类 号：X703[环境科学与工程—环境工程]