Emissões atmosféricas odorantes de uma estação de tratamento de efluentes: limites geográficos da pluma

Abstract

The discomfort caused by bad odors, resulting from anthropic activities, is an increasingly recurrent environmental issue, due to environmental discomfort in local populations under the influence of the plume. The absence of a national standard for parameterization of the method for calculating nuisances represents an environmental challenge for public authorities and environmental management. The European standard EN 16841: 2016 part I and II, inspired by the German standard VDI 3940 parts I and II, applied in the evaluation of odor in the environment, comprises techniques and sensory methods of field inspections to determine the extent of the plume of recognizable odors , through a qualified human panel is the standard oriented to member countries by the European Committee for Standardization for air quality. In this method, the human olfactory apparatus is used as a successful technology that is not artificially replicable in the real on-site identification of odorant compounds, from a known source. That said, the main objective of this work is to measure the geographic limits of fluctuation of the odorous plume in the territory of influence of the sewage treatment plant, the ETE Curado, located in Recife / PE. The research is guided by the proposal of the European method of dynamic plume VDI 3940 part II, simpler to apply and less costly, in the perspective of not using non-human means of capturing the adverse effect of odor. The selection and qualification procedure of the human panel of evaluators was based on the ASTM 679 and ASTM 544 methods, using acetone as the reference substance. The situational investigation of the region of movement of the odorous penumbra proceeded in the period of six months, from February to July of the year of 2019. The results of measurement of the plume, resulted in different responses of position and movement, due to local characteristics of time, orography , roughness and low kinetic mobility mobility. With the results obtained, it was possible to establish the landmarks for the fluctuation of the plume, constituting relevant subsidies for planning the activities of the ETE activities and, alternatively, the proposition of a practical guide for the application of the VDI 3940-1 dynamic plume method