Research of odor emission in Jizhuangzi Sewage Treatment Plant in Tianjin
- Received Date: 19/08/2012
- Accepted Date: 29/04/2012
- Available Online: 09/04/2013
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Key words:
- sewage treatment plant /
- odor concentration /
- odor intensity /
- dispersion mode
Abstract: The air samples were collected in Jizhuangzi Sewage Treatment Plant in 2011, and the odor concentration, dispersion mode, sphere of influence, and the correlation coefficient between each main structure were analyzed in the sewage treatment plant. The results indicate that the concentration of odor emitted from the grid is the highest (4.31 ng/mL), 95.61% of which is H2S. The range of other main structures’ odor concentration is from 0.09 to 0.32 ng/mL, the concentration decreases obviously compared with the previous process. The odor emission is consistent with the Gauss dispersion mode, and the sphere of influence is less then 100 m. The odor emitted from the grid has the main contribution to the odor concentration of the boundary, whose percentage is 42.68%. The degrees of correlation of grid and primary settling tank, dehydration machine room and secondary settling tank are more than 90%.