美国环境保护局（USEPA） 负责确定联邦最低工资 应制定《清洁水法案》要求 国家污染物排放标准 系统允许排放产生的残余沉积物 在水处理厂。美国环保局的一个关键因素 评估是当时剩余物管理的成本 目前不存在此类处理的设施 或者在治疗上会有重大改变 需要满足这种基于技术的管理 要求AWWA启动该项目是为了提供 独立的成本信息有助于美国环保局 成本效益分析。 成本估算是为实施 现有混凝和混凝系统的残余物管理 各种规模和固体生产的石灰软化厂 费率。除了资本成本，每年 与剩余物管理相关的成本如下: 估计并用于计算20- 年电流 剩余物管理的价值。这项工作还提供了 关于可降低成本的重点领域的指导 减少。包括6个参考文献、表格、图表。

The US Environmental Protection Agency (USEPA) was charged with determining whether minimum federal Clean Water Act requirements should be established for National Pollutant Discharge Elimination System permits on the discharge of residuals produced at water treatment plants. A key factor in USEPA's evaluation was the cost of residuals management at facilities where such treatment does not currently exist or where significant treatment changes would be required to meet such a technology-based management requirement. AWWA initiated this project to provide independent cost information to aid in the USEPA cost-benefit analysis. Cost estimates were developed for implementing residuals management at existing coagulation and lime-softening plants of various sizes and solids production rates. In addition to capital costs, annual costs associated with residuals management were estimated and used to calculate the 20-year current worth for residuals management. The work also provides guidance on focus areas where costs can be reduced. Includes 6 references, tables, figures.