| 摘要 |
PURPOSE:To allow independent measurement of C-BOD (biochemical oxygen demand) due to oxidation of organic substance and N-BOD based on nitrification while eliminating the clogging of piping system. CONSTITUTION:A biosenscr 31 measuring C-BOD using microorganisms eating organic substances is combined with a biosensor 32 measuring N-BOD using nitrified bacterium eating ammonia nitrogen and further provided with a pretreatment unit 2 and a suspesoid removing unit 33 thus allowing independent measurement of C-BOD and N-BOD and more detailed analysis of water quality. Even if suspesoid or suspended matters remain in the sample water passed through the pretreatment unit 2, they scarcely cause clogging of piping system and thereby the maintenance frequency can be decreased while enhancing the measurement accuracy. |
