聚电解质在含油污水处理中的应用

含油污水是集悬浮固体、油、溶解气及盐于一体的多相体系，有较强的腐蚀性，易结垢，外排会污染地下水，玻坏生态平衡．故含油污水处理日益受到重视．污水处理方法较多，混凝沉降是重要方法之一，它应用化学剂与污水中的悬浮体形成絮体从水中滤除．聚电解质是重要的污水处理剂．文章阐述了聚电解质在含油污水处理中的应用，指出无机聚电解质处理污水时对ＰＨ值有特定要求，絮凝以电荷中和及捕集为主，所得絮体小且易碎；有机聚电解质对ＰＨ值无特定要求，絮凝以吸附及桥联为主，絮体大且牢固．二者复配使用，效果更好．

Application of Polyelectrolyte in the Treatment of Oily Sewage

Oily sewage is a by-product of oil production. Because of its corrosiveness,scaling and pollution to environment,a great deal of attention has been paid to the treatment of oily sewage. Flocculation and sedimentation is one of the most important methods. In this method,chemicals are used to form floccules with suspensions in sewage,then the floccules are separated from water. The chemicals mostly used is polyelectrolyte.The paper points out the special requirement for PH.value when inorganic polyelectrolyte is used to treat oily sewage. Flocculation is formed mainly by neutralization and capturing of charges. The obtained floccules are small and easy to break. Organic polyelectrolyte has no special requirement for PH value and the flocculation is formed mainly by adsorption and forming briges. The floccules are big and solid. SO for treating oily sewage,it is better to use both inorganic and organic polyelectrolyte.