1996年对《安全饮用水法》的修正案要求美国环境保护局在2000年8月前颁布一项法规，管理废过滤器反冲洗水的回收。根据大型供水设施的经验和目前可用的少量数据，如果对回收流进行有效处理和流量控制，则废过滤器反冲洗水和其他废物流的回收被认为是一种可接受的做法。本文概述了废过滤器反冲洗水和其他循环水流的特点。课程包括:回收废物流；废过滤器反冲洗水和其他循环流的成分；废物流回收的潜在影响；经处理的循环流的潜在水质目标；循环流量的均衡和控制；治疗方案: 固体分离；交替沉积过程；膜过滤；消毒和清除水平；过滤循环描述。

The 1996 amendments to the Safe Drinking Water Act require that the US Environmental Protection Agency promulgate a regulation governing the recycle of spent-filter backwash water by August 2000. Based on experience with large water utilities and the small amount of data currently available, recycling of spent-filter backwash water and other waste streams is considered an acceptable practice when effective treatment and flow control of the recycle stream are provided. This paper outlines the characteristics of spent-filter backwash water and other recycle streams. Topics covered include: recycled waste streams; composition of spent-filter backwash water and other recycle streams; potential impacts of waste stream recycling; potential water quality goals for treated recycle streams; equalization and control of recycle flow; treatment options: solids separation; alternative sedimentation processes; membrane filtration; level of disinfection and removal; and, filtration cycle description.