污水深度处理技术研究进展

摘要: 城市污水的深度处理与再生回用一直是国际上普遍关注的焦点,城镇污水深度处理技术及其深度处理的目的是进一步去除二级（强化）处理未能完全去除的有机污染物、SS、色度、嗅味和矿化物等。常见的深度处理技术包括混凝沉淀、介质过滤（含生物过滤）、膜处理、膜生物反应器（MBR）及氧化等。根据不同的尾水特性，选择适合的深度处理工艺，达到尾水再生利用的目的。

关键词: 深度处理；再生水；工艺

Research progress of wastewater depth treatment technology

Abstract: The depth of the urban sewage treatment and regeneration recycle has always been the focus of widespread concern in the world, as well as the purpose of the depth of the urban sewage treatment technology and its depth is to further remove the secondary (strengthen) failed to completely remove organic pollutants, SS, chromaticity, smelling and mineral compound etc. Common depth treatment technologies include coagulation sedimentation, medium filtration (including biofiltration), membrane treatment, membrane bioreactor (MBR) and oxidation. According to different tail-water characteristics, the suitable depth treatment technology is selected to achieve the purpose of tail water recycling.

Key words: Advanced treatment; Reclaimed water; Technology

随着社会经济的发展，城镇用水量保持着高速增长的态势，而水污染问题却日益严重，水资源短缺成为重要问题。污水厂尾水的再生利用是解决水资源短缺的重要途径之一，这不仅可以有效解决城市化进程中用水需求无法满足的问题，也可以改善尾水排放对环境造成的污染，所以污水的深度处理成为了问题的关键。

1 城市污水深度处理与再生回用的必要性

据统计，我国的669座城市中，缺水城市达400个，全国城市平均每天缺水1600万立方米，每年因缺水影响工业产值约2400亿元。水资源的匮乏、需水量的增加和污染的日益严重，不仅制约了城市经济的发展，更加降低了人民的生活水平。