Treatment of oil-in-water emulsions: performance of a sawdust bed filter.
Treatment of oil-in-water emulsions: performance of a sawdust bed filter.
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DOI：
10.1016/j.jhazmat.2005.09.023
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发表时间：
2006-04
影响因子：
13.6
通讯作者：
Á. Cambiella;Enrique Ortea;G. Ríos;J. M. Benito;C. Pazos;J. Coca
中科院分区：
文献类型：
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作者：
Á. Cambiella;Enrique Ortea;G. Ríos;J. M. Benito;C. Pazos;J. Coca
研究了操作条件对处理水包油乳化液的锯末床过滤器性能的影响。采用3vol.%油的金属加工液作为水包油乳状液，锯末作为过滤介质和吸附剂。由于乳状液的稳定性高，将少量的无机盐(硫酸钙)与脱硫剂混合，作为凝聚剂，实现乳状液的破乳。考察了流速、床层高度、温度、混凝剂加入量等因素对处理效果的影响。实验结果表明，水包油乳状液的除油过程包括混凝、聚结、吸附或过滤等几个过程。进水中的含油量可去除99%以上。实验结果表明，在滤料中加入少量的凝聚剂盐，木屑等低成本的吸附剂用于水包油乳状液的处理是可行的。
The effect of operating conditions on the performance of a sawdust bed filter used for the treatment of an oil-in-water emulsion was investigated. A metalworking fluid (3vol.% oil) was used as oil-in-water emulsion and sawdust as filter medium and sorbent. Because of the high stability of the emulsion, small amounts of inorganic salt (calcium sulphate) were mixed with the sorbent, acting as coagulant to achieve the emulsion breakdown. The influence of flow rate, bed height, temperature and the amount of coagulant salt added was studied. Experimental results show that several processes are involved in oil removal from oil-in-water emulsions, i.e. coagulation, coalescence, adsorption or straining. More than 99% of oil content in the influent stream was removed. Experimental results show that low-cost sorbents like sawdust are feasible to be used in the treatment of oil-in-water emulsions if small amounts of coagulant salts are added to the filter media.