【摘要】 土地处理作为一种生态处理技术以其设备简单、投资少、操作管理方便、能耗低 ,以及净化效果良好而具有广阔的发展前景。文中系统总结了污水土地处理系统国内外研究现状 ,结合当前中国城市供、排水以及用水的特点 ,提出了在城市水循环中应用土地处理技术 ,实现污水资源化的三个方向 :城镇居民区生活污水资源化、城市污水土地处理资源化、微污染原水给水预处理。其中 ,城镇居民区生活污水资源化所采用的砂滤系统及湿地系统 ,存在的主要问题是水力负荷低、处理能力低。如何解决这一问题是一个具有实用意义的研究方向。城市污水集中土地处理所采用的技术目前已经比较成熟 ,存在的问题是占地面积太大。因此必须根据各地区的实际情况 ,因地制宜地选用。应用土地处理技术进行微污染给水预处理是一个新的研究方向 ,它为解决生物预处理技术所不能解决的Ames试验阳性提供了可能 ,同时也不失为一种廉价有效的方法。更多还原

【Abstract】 As a ecological treating techniques, the land treatment systems are of good developing prospects because of its advantages, such as simple of facilities, economization of investment, convenience of operation, lower cost of energy and better effect of purgation. This paper summarizes the research status of wastewater land treatment system home and abroad. From the characteristics of municipal water supplying, draining and application in China at present, this paper also presents three aspects of carrying out wastewater renovation on using the techniques of land treatment in municipal water circulation as follows:renovation of domestic wastewater produced by inhabitants in cities or towns, renovation of wastewater of cities by land treatment techniques and light polluted original water pretreatment for supplement. Among them, sand filter system and wetland system used for renovation of domestic wastewater have problems of lower hydraulic loading and disposal capability. How to solve the problems is a meaningful study. The techniques used for disposing of city wastewater have been mature,but the problem is that the covered land is too large. Therefore, adjusting measures to local conditions depending on the local circumstance is a good way. Application of land treatment techniques to pretreatment of lighter polluted water for drinking water supply is a new study direction. The application offers some possibilities for solving the problem of positivity of Ames test and others, which could not be solved by biological pretreatment techniques, and it is also a cheap and effective method too.更多还原