本标准规定了用于处理生活污水的二级处理系统（STS）和高级二级处理系统的设计、调试、性能和符合性测试要求。可根据本标准测试的设计水力处理能力范围从最小1200L/d到最大5000L/d。还提供了安装、操作和维护指南。

This Standard sets out requirements for the design, commissioning, performance and compliance testing of secondary treatment systems (STS) and advanced secondary treatment systems designed to treat domestic wastewater. The design hydraulic treatment capacities that may be tested in accordance with this Standard range from a minimum of 1200L/d to a maximum of 5000L/d. Guidance on installation, operation and maintenance is also provided.