标准编号：ISO 5815-1:2019
中文名称：水质 n天后生物化学氧 需求（BODn ）测定 第1部分：烯丙基硫脲添加剂稀释和接种法
英文名称：Water quality — Determination of biochemical oxygen demand after n days (BODn) — Part 1: Dilution and seeding method with allylthiourea addition
发布日期：2019-07
标准范围
This document specifies the determination of the biochemical oxygen demand of waters by dilution and
seeding with suppression of nitrification after 5 d or 7 d incubation time.
It is applicable to all waters having biochemical oxygen demands usually between 1 mg/l and
6 000 mg/l. It applies particularly to waste waters but also suits for the analysis of natural waters.
For biochemical oxygen demands greater than 6 000 mg/l of oxygen, the method is still applicable, but
special care is needed taking into consideration the representativeness of subsampling for preparation
of the dilution steps. The results obtained are the product of a combination of biochemical and chemical
reactions in presence of living matter which behaves only with occasional reproducibility. The results
do not have the rigorous and unambiguous character of those resulting from, for example, a single,
well-defined, chemical process. Nevertheless, the results provide an indication from which the quality
of waters can be estimated.
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