830
C. Faé et al.
Table 3 Monthly cost for use of treated water in environments
Local
Daily demand
(L/day)
Daily cost
with sewage
rate (R$)
Frequency
(days)
Monthly
demand
(L/month)
Total monthly
value (R$)
Cleaning
Rooms
3,482.16
31.08
20
69,643.32
621.72
Halls
1,555.98
13.89
20
31,119.60
277.92
Irrigation
Gardens 2,685.06
23.98
8
21,480.48
191.81
Total
7,723.20
38.31
–
122,243.40
1,091.45
the apparatus, by model. The flow of Haier appliances was considered to be composed
of four appliances, since the collection model was installed so that all were drained
to the same outlet. According to observations of the water generation, it was found
that the Split models presented higher energy efficiency, consequently the window
models produced a larger volume of water. Apparatus, especially the Split, had a
large initial production of water due to the high humidity rates in the environments,
whose value stabilized over time, since the volume generated in the first minutes
was higher than the volume generated in the final minutes. Finally, considering all
appliances, in all study rooms, a daily volume of 289.36 L was found.
From the results obtained, Table 4, it was set up as a way of comparison for the
analyzed sources and parameters. In addition to the comparison between the sources,
an analysis of compliance with CONAMA Resolution 357/2005 was carried out,
according to the maximum permitted values (MPV) for waters of class 3. The results
of the chemical and microbiological analysis indicate a similarity of values between
the sources, allowing the use of both for purpose of cleaning the rooms and corridors,
besides watering the gardens, after a simple filtration process that has the purpose of
reducing the matter avoid accumulation of solids in the reservoirs.
From the quantitative and qualitative analysis, as well as the location of the air
conditioners and the local drainage, it seems more efficient the use of two reservoirs
separately for each source of water. For rainwater, with the possibility of supplying
a large part of the cleaning demand of the rooms and corridors with each rain for
at least two days of use, a water box with a volume of 15,000 L should be adopted,
located near Labiotecs and discharge of the roof, reducing costs with new pipes.
According to the rainfall characteristics in the municipality and the catchment area,
it is predicted that the reservoir has the capacity to be filled in about 84 min of heavy
rainfall.
The reservoir intended to store the volume of water generated by the air conditioners has been calculated for the maximum accumulation period of three days if
the reserved volume is used for washing and irrigation twice a week. Therefore, its
volume was estimated at 851.8 L and adopting a safety factor of 10%, a volume of
934 L is obtained. Commercially, a 1000 L reservoir is indicated as the more appropriate for the project, and the best position for the project will be in the center of
C. Faé et al.
Table 3 Monthly cost for use of treated water in environments
Local
Daily demand
(L/day)
Daily cost
with sewage
rate (R$)
Frequency
(days)
Monthly
demand
(L/month)
Total monthly
value (R$)
Cleaning
Rooms
3,482.16
31.08
20
69,643.32
621.72
Halls
1,555.98
13.89
20
31,119.60
277.92
Irrigation
Gardens 2,685.06
23.98
8
21,480.48
191.81
Total
7,723.20
38.31
–
122,243.40
1,091.45
the apparatus, by model. The flow of Haier appliances was considered to be composed
of four appliances, since the collection model was installed so that all were drained
to the same outlet. According to observations of the water generation, it was found
that the Split models presented higher energy efficiency, consequently the window
models produced a larger volume of water. Apparatus, especially the Split, had a
large initial production of water due to the high humidity rates in the environments,
whose value stabilized over time, since the volume generated in the first minutes
was higher than the volume generated in the final minutes. Finally, considering all
appliances, in all study rooms, a daily volume of 289.36 L was found.
From the results obtained, Table 4, it was set up as a way of comparison for the
analyzed sources and parameters. In addition to the comparison between the sources,
an analysis of compliance with CONAMA Resolution 357/2005 was carried out,
according to the maximum permitted values (MPV) for waters of class 3. The results
of the chemical and microbiological analysis indicate a similarity of values between
the sources, allowing the use of both for purpose of cleaning the rooms and corridors,
besides watering the gardens, after a simple filtration process that has the purpose of
reducing the matter avoid accumulation of solids in the reservoirs.
From the quantitative and qualitative analysis, as well as the location of the air
conditioners and the local drainage, it seems more efficient the use of two reservoirs
separately for each source of water. For rainwater, with the possibility of supplying
a large part of the cleaning demand of the rooms and corridors with each rain for
at least two days of use, a water box with a volume of 15,000 L should be adopted,
located near Labiotecs and discharge of the roof, reducing costs with new pipes.
According to the rainfall characteristics in the municipality and the catchment area,
it is predicted that the reservoir has the capacity to be filled in about 84 min of heavy
rainfall.
The reservoir intended to store the volume of water generated by the air conditioners has been calculated for the maximum accumulation period of three days if
the reserved volume is used for washing and irrigation twice a week. Therefore, its
volume was estimated at 851.8 L and adopting a safety factor of 10%, a volume of
934 L is obtained. Commercially, a 1000 L reservoir is indicated as the more appropriate for the project, and the best position for the project will be in the center of