污水井中气体分布规律及影响因素研究

为研究污水井中气体分布规律和影响因素,以北京市某区部分沟段污水井为研究对象,根据不同污水来源将沟段分为餐饮区、住宅区和商业区。在不同季节现场检测了不同分区污水井内氧气、二氧化碳、硫化氢等气体浓度,得出了气体分布规律和影响因素。研究结果表明,污水沟段内氧气、二氧化碳和硫化氢的分布情况受污水来源和季节影响;污水井内氧气和二氧化碳分布具有季节差异,夏季和秋季氧气含量较低,二氧化碳含量较高,春季和冬季氧气含量较高,二氧化碳含量较低;大部分污水沟段硫化氢含量超标,相对春、夏、秋3个季节,冬季硫化氢含量较低;相对商业区和住宅区,餐饮区污水井硫化氢含量超标最严重。

Gas Distribution Regularities and Influencing Factors in Sewage Wells

In order to study the gas distribution and influencing factors in sewage wells, the sewage wells in some ditches of a district of Beijing were taken as the research object. According to different sewage sources, the ditches were divided into catering area, residential area and commercial area. The concentration of oxygen, carbon dioxide, hydrogen sulfide and other gases in sewage wells in different zones were measured in different seasons. The gas distribution regularities was obtained and the influencing factors were analyzed. The results show that the distribution of oxygen, carbon dioxide and hydrogen sulfide in sewage ditches is affected by sewage source and season;the distribution of oxygen and carbon dioxide in sewage wells has seasonal differences, the oxygen content in summer and autumn is lower, the carbon dioxide content is higher, the oxygen content in spring and winter is higher, and the carbon dioxide content is lower;the hydrogen sulfide content in most sewage ditches exceeds the standard. Compared with spring, summer and autumn, the content of hydrogen sulfide in winter is lower in most sewage ditches. Compared with commercial and residential areas, the content of hydrogen sulfide in sewage wells in catering areas is over standard most seriously.