BS EN ISO 14853:2017规定了测定最终厌氧菌浓度的方法 厌氧微生物对塑料的生物降解性。本节中描述的条件 国际标准不一定符合最大值的最佳条件 发生生物降解的程度。试验要求将试验材料暴露在污泥中一段时间 高达90天，比厌氧消化池中的正常污泥停留时间（25至30天）长， 虽然工业现场的消化池可以有更长的保留时间。该方法适用于以下材料:天然和/或合成聚合物、共聚物或其混合物；含有增塑剂、着色剂或其他化合物等添加剂的塑料材料；水溶性聚合物；在试验条件下不会抑制接种物中微生物的材料。 可以使用抑制对照或其他适当的方法来确定抑制效果 （参见ISO 13641）。如果试验材料对接种物有抑制作用，则试验浓度越低， 可以使用另一种接种物或预先暴露的接种物。交叉引用:ISO 13641ISO 11923ISO 11734ISO 7827ISO 8245购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS EN ISO 14853:2017 specifies a method for the determination of the ultimate anaerobic biodegradability of plastics by anaerobic microorganisms. The conditions described in this International Standard do not necessarily correspond to the optimum conditions for the maximum degree of biodegradation to occur. The test calls for exposure of the test material to sludge for a period of up to 90 d, which is longer than the normal sludge retention time (25 to 30 d) in anaerobic digesters, although digesters at industrial sites can have much longer retention times.The method applies to the following materials:natural and/or synthetic polymers, copolymers or mixtures thereof;plastic materials which contain additives such as plasticizers, colorants or other compounds;water-soluble polymers;materials which, under the test conditions, do not inhibit the microorganisms present in the inoculum.Inhibitory effects can be determined using an inhibition control or by another appropriate method (see e.g. ISO 13641). If the test material is inhibitory to the inoculum, a lower test concentration, another inoculum or a pre-exposed inoculum can be used.Cross References:ISO 13641ISO 11923ISO 11734ISO 7827ISO 8245All current amendments available at time of purchase are included with the purchase of this document.