Methane emission from sewers.

摘要: Recent studies have shown that sewer systems produce and emit a significant amount of methane. Methanogens methane under anaerobic conditions in biofilms sediments, the stratification methanogens sulfate-reducing bacteria may explain simultaneous production sulfide sewers. No sinks or methanotrophic activities been identified sewers to date. Therefore, most would be emitted at interface between sewage atmosphere gravity sewers, pumping stations, inlets wastewater treatment plants, although oxidation aeration basin plant has reported recently. Online measurements also revealed highly dynamic temporal spatial variations caused by factors such as hydraulic retention time, area-to-volume ratio, temperature, concentration organic matter sewage. Both mechanistic empirical models proposed predict Due sensitivity environmental conditions, chemicals effective controlling suppress diminish production. In this paper, we review recent on emission from including mechanisms, quantification, modeling, mitigation.