城市生活排水系统废气产排量测算模拟研究——以餐饮污水为例

Simulation investigation on the generation of waste gas from municipal sewerage system: The case of catering sewage﹡

摘要: 通过实验室静态模拟试验，研究了城市餐饮污水水质的变化规律，特征气体污染物产生规律，并分析了CH4、CO2、H2S产生量与水质变化规律之间的关联性，计算了各种有害气体的产气系数.结果表明，CH4、CO2、H2S的产排量随着污水停留时间的延长呈上升趋势；CODcr是影响甲烷和二氧化碳产生的主要指标，硫酸根是影响硫化氢产生的主要指标.三者的产气系数分别为：3.71～17.9g/kgCODcr去除量、24.5～40.4g/kgCODcr去除量、1.50～7.10g/kg硫酸根去除量.

Abstract: In this paper, a static simulation device was used to investigate the generation of gas and the change of sewage quality for catering sewage. And the relationship between the amount of gas production and change of sewage qualities were analyzed. The coefficients of several harmful gases were calculated. Results showed that the generated amounts of methane, carbon dioxide, hydrogen sulfide were increased with hydraulic retention time. The removal of CODcr was the major indicator of methane and carbon dioxide generation, while the removal of SO42- was the major indicator of hydrogen sulfide generation. Methane, carbon dioxide and hydrogen sulfide generation coefficients were 3.71～17.9g/kg as the removal of CODcr, 24.5～40.4g/kg as the removal of CODcr, 1.50～7.10g/kg as the removal of SO42-.