недоступно на русском языке

Тезис Предпросмотр

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.


Общая информация

  • Текущий статус :  Published
    Дата публикации : 2019-07
  • Версия : 2
  • :
    ISO/TC 147/SC 5
    Biological methods
  • 13.060.50
    Examination of water for chemical substances

Приобрести данный стандарт

Формат Язык
PDF + ePub
Бумажный
  • CHF118

Жизненный цикл


Появились вопросы?

Ознакомьтесь с FAQ

Работа с клиентами
+41 22 749 08 88

Часы работы:
Понедельник – пятница: 09:00-12:00, 14:00-17:00 (UTC+1)

Будьте в курсе актуальных новостей ИСО

Подписывайтесь на наши новости, обзоры, а также на информацию о продуктах.