1.1 本试验方法测定了在实验室条件下，在高温下暴露于受控堆肥环境中的塑料材料的需氧生物降解程度和速率。本试验方法旨在在类似堆肥条件的受控条件下产生可重复和可重复的试验结果，其中达到了高温。将试验物质暴露于来自城市固体废物堆肥的接种物中。好氧堆肥发生在温度、通风和湿度受到密切监测和控制的环境中。 注1: 在堆肥过程中，大型专业管理设施最容易达到高温。然而，较小的住宅堆肥单元也可能达到这些温度，通常称为“后院”或“家庭”堆肥。 1.2 本试验方法旨在获得样品中碳转化为二氧化碳的百分比。生物降解速率也进行了监测。 1.3 本试验方法适用于所有塑料材料，这些材料拟在达到高温的设施中进行堆肥。 1.4 以国际单位制表示的数值应视为标准。 1.5 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。 第节给出了具体的危险说明 8. . 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和健康实践，并确定监管限制的适用性。 1.7 本试验方法等同于ISO 14855 1.8 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 堆肥装置内塑料的生物降解是一种重要现象，因为它可能会影响由塑料包围的其他材料的分解以及由此产生的堆肥材料的质量和外观。塑料的生物降解也将允许通过大型、专业管理的堆肥厂和运行良好的住宅单元安全处置这些塑料，在那里可以达到高温。开发该程序是为了确定塑料制品在受控堆肥过程中的需氧生物降解率和程度。 5.2 限制- 由于堆肥设施的建造和运行存在很大差异，并且堆肥系统的监管要求也不同，因此本程序无意模拟任何特定堆肥系统的环境。然而，预计其类似于在最佳条件下运行的堆肥过程的环境，其中达到了高温。更具体地说，该程序旨在创建一个标准的实验室环境，允许在受控堆肥条件下快速且可重复地测定需氧生物降解性。

1.1 This test method determines the degree and rate of aerobic biodegradation of plastic materials on exposure to a controlled-composting environment under laboratory conditions, at thermophilic temperatures. This test method is designed to yield reproducible and repeatable test results under controlled conditions that resemble composting conditions, where thermophilic temperatures are achieved. The test substances are exposed to an inoculum that is derived from compost from municipal solid waste. The aerobic composting takes place in an environment where temperature, aeration and humidity are closely monitored and controlled. Note 1: During composting, thermophilic temperatures are most readily achieved in large-scale, professionally-managed facilities. However, these temperatures may also be reached in smaller residential composting units, frequently referred to as “backyard” or “home” composting. 1.2 This test method is designed to yield a percentage of conversion of carbon in the sample to carbon dioxide. The rate of biodegradation is monitored as well. 1.3 This test method is designed to be applicable to all plastic materials, which are intended to be composted in facilities that achieve thermophilic temperatures. 1.4 The values stated in SI units are to be regarded as the standard. 1.5 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. Specific hazard statements are given in Section 8 . 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 and health practices and determine the applicability of regulatory limitations prior to use. 1.7 This test method is equivalent to ISO 14855. 1.8 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 Biodegradation of a plastic within a composting unit is an important phenomenon because it may affect the decomposition of other materials enclosed by the plastic and the resulting quality and appearance of the composted material. Biodegradation of plastics will also allow the safe disposal of these plastics through large, professionally-managed composting plants and well-run residential units, where thermophilic temperatures are achieved. This procedure has been developed to permit the determination of the rate and degree of aerobic biodegradability of plastic products when placed in a controlled composting process. 5.2 Limitations— Because there is a wide variation in the construction and operation of composting facilities and because regulatory requirements for composting systems vary, this procedure is not intended to simulate the environment of any particular composting system. However, it is expected to resemble the environment of a composting process operated under optimum conditions where thermophilic temperatures are achieved. More specifically, the procedure is intended to create a standard laboratory environment that will permit a rapid and reproducible determination of the aerobic biodegradability under controlled composting conditions.