Avaliação do reaproveitamento da água da chuva e o reuso de água em lava-rápido na Baixada Santista
Data
2021-08-04
Autores
Momensso, Felipe 
Orientadores
Penteado, Eduardo Dellosso
Tipo
Trabalho de conclusão de curso
Título da Revista
ISSN da Revista
Título de Volume
Resumo
A problemática da água no Brasil é marcada por perdas durante a
distribuição, desperdício e desigualdades no abastecimento. O cenário futuro aponta
para o crescimento econômico e fatores climáticos corroborando com o aumento do
consumo desenfreado de água, os quais exigem soluções ambientais em prol da redução
do uso, principalmente em atividades em que há grande consumo. Desta forma, este
trabalho teve como objetivo analisar a viabilidade econômica da aplicação de um projeto
sustentável, envolvendo o tratamento e o reuso da água utilizada nas lavagens de carros
e o aproveitamento da água de chuva em lava-rápidos na cidade de Guarujá, São Paulo.
A aplicação da água proveniente da captação de chuva e o reuso da água utilizada nas
lavagens foram avaliadas como um único sistema em conjunto para diminuir o consumo
de água nos comércios de lavagem de veículos. Para o desenvolvimento do projeto
foram realizados levantamentos bibliográficos, coletas de dados climatológicos e
financeiros. Posteriormente foi aplicada a metodologia de VPL (Valor Presente Líquido)
para determinar a viabilidade do projeto. Foi verificado que a aplicação do tratamento de
água para reuso, com o sistema de gradeamento, caixa de água e óleo (SAO) e flotação
por ar dissolvido possui uma eficiência na remoção de contaminantes estimada em 95%
e atende os padrões de lançamento de efluentes exigidos pelas legislações ambientais.
Também foi avaliado que o sistema de reuso e o aproveitamento da água de chuva foram
capazes de atender toda demanda mensal de água do lava-rápido. Com isso concluímos
que este projeto possui investimento sustentável e rentável, com um retorno de
investimento de 5 meses e uma TIR (taxa interna de retorno) de 9%.
The water problem in Brazil is marked by losses during distribution, waste, and inequalities in the supply. The future scenario points to economic growth and climatic factors corroborating the increase in the unbridled consumption of water, which requires environmental solutions to reduce its use, especially in activities where there is high consumption. Thus, this study aimed to analyze the economic feasibility of implementing a sustainable project involving the treatment and reuse of water used in car washes and the use of rainwater in a car wash in the city of Guarujá, São Paulo. The application of water from rainwater catchment and the reuse of water used in car washes were evaluated as a single system to reduce water consumption in car wash businesses. For the development of the project, bibliographic research, climatological and financial data collection was carried out. Afterward, the NPV (Net Present Value) methodology was applied to determine the project's viability. It was verified that the application of water treatment for reuse, with a system of grading, water and oil separator container (SAO), and dissolved air flotation has an efficiency in the removal of contaminants estimated at 95% and meets the standards of effluent discharge required by environmental laws. It was also evaluated that the reuse system and the use of rainwater were able to meet the entire monthly water demand of the car wash. Thus, we conclude that this project has a sustainable and profitable investment, with a return on investment of 5 months and an IRR (internal rate of return) of 9%.
The water problem in Brazil is marked by losses during distribution, waste, and inequalities in the supply. The future scenario points to economic growth and climatic factors corroborating the increase in the unbridled consumption of water, which requires environmental solutions to reduce its use, especially in activities where there is high consumption. Thus, this study aimed to analyze the economic feasibility of implementing a sustainable project involving the treatment and reuse of water used in car washes and the use of rainwater in a car wash in the city of Guarujá, São Paulo. The application of water from rainwater catchment and the reuse of water used in car washes were evaluated as a single system to reduce water consumption in car wash businesses. For the development of the project, bibliographic research, climatological and financial data collection was carried out. Afterward, the NPV (Net Present Value) methodology was applied to determine the project's viability. It was verified that the application of water treatment for reuse, with a system of grading, water and oil separator container (SAO), and dissolved air flotation has an efficiency in the removal of contaminants estimated at 95% and meets the standards of effluent discharge required by environmental laws. It was also evaluated that the reuse system and the use of rainwater were able to meet the entire monthly water demand of the car wash. Thus, we conclude that this project has a sustainable and profitable investment, with a return on investment of 5 months and an IRR (internal rate of return) of 9%.
Descrição
Citação
MOMENSSO, Felipe. Avaliação do reaproveitamento da água da chuva e o reuso de água em lava-rápido na Baixada Santista. 2021. 66 f. Trabalho de conclusão de curso (Graduação em Engenharia Ambiental) - Instituto do Mar, Universidade Federal de São Paulo, Santos, 2021.