摘要
复氧是困扰人工快渗、构造湿地等污水渗滤土地处理系统已久的问题。国际上目前采用的方法主要有3种:一是采用干湿交替的工作方式进行系统复氧,一是设置通气管对系统内部进行复氧,再一是利用植物的根系对系统内部进行复氧。研究结果表明,干湿交替的工作方式对系统的复氧条件有明显改善,而小水力负荷周期的工作方式对系统的复氧更为有效。通气管的设置通常与间歇性布水工作方式相结合,其效果通常要明显好于单纯采用干湿交替的工作方式。植物根系对系统的复氧,常因植物不同类型而具有不同的氧传输能力,植物根茎所能到达的范围往往决定了系统有效处理部位的大小。
Oxygen recovery has been a puzzled problem in Wastewater Land Infiltration Treating Systems such as Constructed Wetlands, Constructed Rapid Infiltration Systems for a long time. There are three methods which have been widely used in the world to achieve oxygen recovery effectively. They are (1)using flooding and drying alternate working fashion, (2)setting ventilation pipes in the systems, and (3) using roots and stems of plants, respectively. The research results show that, flooding and drying alternate working fashion can improve oxygen recovery for the systems obviously, however, shorter hydraulic loading cycle can make oxygen recovery more effective. In general, ventilation pipes setting were connected with intermittent loading fashions. This connection will be more effective than flooding and drying alternate working fashion for oxygen recovery. Oxygen recovery through roots and stems of plants are different, because different types of plants usually have different oxygen transmission capabilities. The scopes of effective treating places were determined by scale of roots reaching.
出处
《水文地质工程地质》
CAS
CSCD
2003年第1期103-106,109,共5页
Hydrogeology & Engineering Geology
基金
国家自然科学基金项目(49832005)
国家重点基础研究发展规划项目(G1999045706).
