LUOGa,ZHOUZuo-yong,ZHAODong-quan,et al.Characteristics and Influencing Factors of H2S Emission from Residential Septic Tanks[J].China Water & Wastewater,2022,38(13):1-7.
Characteristics and Influencing Factors of H2S Emission from Residential Septic Tanks
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第13期
Page:
1-7
Column:
Date of publication:
2022-07-01
- Keywords:
- septic tank; H2S; emission characteristics; influence factor
- Abstract:
- H2S emission from septic tanks in residential areas is an important cause of odor pollution and complaints in communities. In this study, a residential area was selected and the septic tanks emissions flow rate, H2S concentration, influent quality and flow rate were continuously monitored, and H2S emissions and related influencing factors were analyzed. The results showed that the monthly measured septic tanks H2S emission concentrations in this residential area were （69.9 ± 25.4） mg/m3 and showed a pattern of high in summer and low in winter. Influent pH, oxidation reduction potential (ORP), and sulfate were significantly negatively correlated with monthly monitored H2S emission concentrations, while air temperature, humidity, water temperature, COD, and sulfide concentrations were significantly positively correlated with H2S emission concentrations. The variation of septic tanks H2S emission concentration with time was measured on a day in June, and it was found that there was a significant peak of H2S emission concentration during the time of meal and wash for residents, and the Pearson correlation coefficient R value of 0.32 between sewage flow rate and H2S emission concentration was significantly correlated. The annual per capita H2S emission from septic tanks in this residential area was 2.34×10-3 kg, and the total annual emission of H2S from septic tanks in residential areas in Beijing City was estimated to be 51.3 t.
Last Update:
2022-07-01