Understanding key factors influencing hydrogen sulfide emissions in sewer systems

Abstract

Hydrogen sulfide (H?S) emissions are a major contributor to sewer corrosion, posing risks to infrastructure durability, public health, and the environment. A comprehensive understanding of the factors influencing H?S formation and emissions remains incomplete despite extensive research. This study aims to analyze the impact of hydrogen sulfide factors (HSF) and evaluate their role in hydrogen sulfide impacts (HSI). The research follows a four-stage methodology. First, an extensive literature review and expert interviews were conducted to identify and categorize HSF. Second, a pilot survey was developed to refine the questionnaire, followed by the third stage, where a structured questionnaire was distributed to industry professionals. Finally, Structural Equation Modeling (SEM) was applied to analyze relationships among the identified factors. The results confirm a strong model, demonstrating the significant influence of HSF on HSI, with an R² value of 76.3%, highlighting the robustness of the proposed framework. This research provides critical insights for decision-makers, particularly infrastructure construction engineers, by prioritizing key factors that drive H?S emissions and implementing effective mitigation strategies. Additionally, it aids environmental engineers and policymakers in developing preventive measures to minimize the environmental and health impacts of H?S emissions. This study enhances the understanding of hydrogen sulfide emissions dynamics by offering a systematic and data-driven approach. It supports more informed decision-making for designing, operating, and maintaining resilient sewer networks.