CB* 3328.3-1988
Method for inspecting quality of water discharged from treatment of vessel sewage. Method of test for biochemical oxygen demand (English Version)

Standard No.

CB* 3328.3-1988

Language

Chinese, Available in English version

Release Date

1988

Published By

Professional Standard-Ships

Scope

This standard is applicable to the inspection of water quality and biochemical oxygen demand of ship sewage treatment discharge water, and also applies to the inspection of water quality and biochemical oxygen demand of other wastewater discharge water. This standard specifies methods for the experimental and routine determination of biochemical oxygen demand by dilution and inoculation of water. This standard applies to all water bodies with biochemical oxygen demand greater than or equal to 3mg/L, but not greater than 6000mg/L. This method can still be applied when the biochemical oxygen demand is greater than 6000mg/L, but errors will occur due to dilution, so the results must be interpreted with caution. The results obtained are the result of a combination of biochemical and chemical reactions. It does not have strict, well-defined characteristics and is different from the results of a single chemical process. But it can still be used as a basis for evaluating water quality. Substances present in the water, such as biocides, toxic metals or free chlorine, inhibit biochemical oxidation. The presence of algae or digestive microorganisms can bias results to a higher level.