1.1 本规程涵盖了对水和废水进行压力在线混凝-絮凝过滤的程序。适用于悬浮物含量相对较低（<30 mg/L）的水和废水。本规程适用于大于100 mm（4 in.）的任何尺寸的过滤器直径。 1.2 在水中进行压力在线混凝-絮凝过滤试验的实践依赖于浊度测量来评估水质，参考试验方法 D7315 , D6698 或 D6855 进行浊度测量。 1.3 本规程可用于确定絮凝剂或混凝剂或两者以及过滤介质（a）在去除水和废水中的悬浮物和胶体物质方面的有效性。 1.4 过滤器反洗间隔、反洗要求、冲洗要求以及过滤速率对出水水质的影响也可以通过该实践获得。 1.5 以国际单位制表示的数值应视为标准值。括号中给出的值是英寸的数学转换- 磅单位仅供参考，不被视为标准单位。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 压力在线混凝-絮凝-过滤是去除水和废水中悬浮物和胶体物质的有效工艺。 5.2 该过程的有效性取决于絮凝剂或混凝剂的类型和浓度，或两者，pH值、温度、过滤介质（a）和过滤速率。这种做法允许评估这些不同的参数。 5.3 该规程也可用于确定过滤器反洗和冲洗要求。 5.4 从该实践中获得的结果可用于大型系统的工厂设计。

1.1 This practice covers the procedure used to perform pressure in-line coagulation-flocculation-filtration of water and waste water. It is applicable to water and waste water with relatively low suspended solids (<30 mg/L). The practice is applicable for any size filter greater than 100 mm (4 in.) in diameter. 1.2 This practice for performing pressure in-line coagulation-flocculation-filtration tests in water relies on turbidity measurement to assess the water quality, referring to Test Methods D7315 , D6698 , or D6855 to perform the turbidity measurement. 1.3 This practice can be used to determine the effectiveness of flocculants or coagulants, or both, and filter medium(a) in removing suspended and colloidal material from water and waste water. 1.4 Interval between filter backwashing, backwash requirements, rinse requirements, and effect of filtration rate on effluent quality can also be obtained with this practice. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Pressure in-line coagulation-flocculation followed by filtration is an effective process to remove suspended and colloidal matter from water and waste water. 5.2 The effectiveness of this process is dependent on the type and concentration of the flocculant or coagulant, or both, the pH, the temperature, the filtration medium(a), and the filtration rate. This practice permits the evaluation of these various parameters. 5.3 This practice can also be used to determine filter backwash and rinse requirements. 5.4 The results obtained from this practice can be used for plant design of large systems.