Características sensoriais e o risco microbiológico em águas cinza tratadas para reúso predial
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Data
2015-11-04
Autores
Oliveira, Laila de Oliveira Vaz
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Universidade Federal do Espírito Santo
Resumo
Risk perceptions are triggered by emotional reactions and are represented as a feeling or instinct to indicate quickly whether something is good or bad, safe or unsafe. Thus, judgment and perceptions of risk are less knowledge-based than "think" about a hazard and more about how you feel about it (affective reactions). Thus, perceptions as pleasant or unpleasant odor of the effluent to be reused can induce feelings of low or high risk to the user, directly influencing the user's decision to reuse the water. This study aims to analyze the sensory characteristics (odor) of the greywater at different stages of treatment to different types of reuse systems through sensory methodologies, and to evaluate the microbiological risk inserted into the reuse of greywater. The main focus is to identify possible links between these characteristics and their effects on the microbiological risk and the perception of the users of treated greywater. The main objective of the survey is to provide technical support for the practice of consolidation of reuse in Brazilian buildings according to criteria and parameters which ensure the health and environmental performance of building reuse greywater systems. Therefore, was developed three items: (1) Greywater reuse in buildings In Quantitative Assessment Of Microbiological Risk Perspective, (2) Quantitative Assessment Of Microbiological Risk Arising From Greywater reuse in buildings Treated For A Anaerobic Filter Followed From Wetlands and (3) Study of the perception of the reuse system user via olfactometry analysis of greywater treated at different quality levels. It is possible to establish a relationship between the olfactometry analysis and microbiological risk. The results of olfactometry analysis revealed that the treated effluent in Wetland presented odor with enough intensity to be perceived, even with their considerably reduced intensity indicating that treatment as satisfactory in removing the odor generating effluent of good acceptance and microbiologically safe, not adding risk the user. As technical support for the practice of consolidation of reuse in Brazilian buildings becomes plausible to propose a limit on water reuse in sanitary basin 1000NMP / 100ml without adding risk to the user.
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Greywater , Building reuse , Quantitative Assessment Of Microbiological Risk , Sensory analysis , Água cinza , Reúso predial , Risco microbiológico , Análise sensorial