[Endogenous respiration process analysis of heterotrophic biomass and autotrophic biomass based on respiration map ].

The endogenous process is an important metabolic part of the activated sludge, and the understanding of this process is still unclear. Characteristics of endogenous respiration for heterotrophic bacteria and autotrophic nitrifiers were analyzed using respirogram. Results showed that both heterotrophic and autotrophic bacteria entered the stage of endogenous respiration at almost the same time, but heterotrophic bacteria first entered the stage of dormancy i.

[Spectral characteristics of soluble metabolites during endogenous respiration].

Endogenous respiration phase plays an important role in the sewage treatment process. In order to clearly understand the endogenous respiration process of the activated sludge process, three-dimensional fluorescence spectroscopy, ultraviolet spectroscopy and respirogram were employed for the analysis of endogenous respiration process. Results showed that the three-dimensional fluorescence spectroscopy and UV spectroscopy could identify all stages significantly.