Геотубная Технология Очистки Сточных Вод И Проблемы Дезодорирования Биогазовых Выбросов

Using the operation of sewage-purification facilities as an example, the author subjects to analysis the causes of ill-smelling emanations within the limits of a capital city, which are technogenic in character. It has been shown that the most likely cause of odors of this kind is the formation of ill-smelling sulfur-containing organic compounds from the class of mercaptans (or thiols - according to the new classifi cation). These substances are released into the biogas from geotubes as a result of anaerobic digestion of biomass. The process is associated with the interaction between the products resulting from the transformations of biochemically decomposed organic compounds and hydrogen sulfi de, which is always contained in biogas. These processes are initiated in the volume of geotubes, which have the role of biogas reactors in sewage-purifi cation facilities, due to the solar heating of biomass. In this case, the mesophilic fermentation conditions optimal for this reaction are achieved (up to 30 ± 3°C or more). The spread of the ill-smelling emanation is facilitated by the porous structure of the geotube material, the area of each of them being of approximately 3000 m2, and their total number being of several tens. The eff ect of such emanations is cyclical in nature, which is manifested annually in recent years, since their intensity coincides with the increase of average summer temperatures. Therefore, the emanations in question can also be attributed to the manifestation of global warming. In this regard, in order to prevent the repetition of this process, which can develop even more, an analysis and study of its characteristics is required.