INFLUENCE OF CLIMATIC FACTORS ON THE OPERATION OF NATURAL-TECHNICAL SYSTEMS FOR THE SEWAGE SLUDGE TREATMENT 120
The prospects of the use of solar energy, which helps to reduce capital costs for the treatment of sewage sludge under natural conditions, provides leadership in the selection of natural-technical sy stems for the treatment sewage sludge - drying beds (sewage dumps). A distinctive feature of the functioni ng of drying beds is the direct dependence of the operating mode on the climate load (µ), i. e. the combin ed influence of average annual air temperature and precipitation. The dynamics of µ was studied for dry ing beds located within the territory of the Leningrad region. The paper analyzes the regulatory require ments and recommendations for the operation of drying beds that «migrate» from one version of regulatory documents to another. The main standard criteria of climate load (µ) do not match the actual influen ce of average annual air temperature and precipitation as basic parameters of the operation of natural-technical waste treatment systems. It was found that the average annual amount of precipitation exceeded the established norms by 1 to 3 steps, while the range of average annual air temperatures of the entire chronological series corresponded to the standard step of ranking. The influence of atmospheric precipitation chan ged the value of µ and its territorial specifics. The results of the study allow for the conclusion that the increasing precipitation could contribute to the loss of operational and environmental protection pr operties of the natural-technical sewage sludge treatment systems designed and operated in accordance with th e regulatory requirements.