Temporal Variation Characteristics and Influencing Factors of H2S Emission Concentration in Aerated Grit Chamber
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
7 7
Page:
74-77
Column:
Date of publication:
2020-04-01
- Keywords:
- aerated grit chamber; hydrogen sulfide (H2S); temporal variation characteristics; influencing factor
- Abstract:
- In order to understand temporal variation characteristics and influencing factors of H2S emission concentration in wastewater treatment structures, real-time online monitoring of H2S concentration in an aerated grit chamber of a wastewater treatment plant (WWTP) in Suzhou was carried out from August to October with heavy odor pollution in 2014 and 2015 respectively (the sampling interval was 30 s). The H2S emission concentration of WWTP fluctuated greatly and had obvious variation characteristics, which was the highest at 11:00-14:00, 17:00-19:00 and 22:00-02:00 and the lowest at 05:00-09:00 and 15:00-16:00 in a day. The effects of wastewater flow rate, sulfide concentration, pH value and water temperature on H2S emission concentration were further investigated. The emission concentration of H2S had significant positive correlations with wastewater flow rate (1 180-2 360 m3/h), sulfide concentration (0.36-0.71 mg/L) and water temperature (26.8-27.1 ℃). The Pearson correlation coefficients of sulfide concentration and water temperature with H2S concentration were 0.84 and 0.62, respectively. Within a day, pH value fluctuated within a small range (7.07-7.23), showing no significant correlation with H2S concentration.
Last Update:
2020-04-01