Hi All,
I apologize that I did not get back to you earlier. I have been out of the office for the last couple days. What exciting conversation! I’m so enjoying this dialogue because it’s been such a great opportunity to learn more about this water system. Thank you.
So, in response to your inquiries….
Etta Projects’ exper...
Hi All,
I apologize that I did not get back to you earlier. I have been out of the office for the last couple days. What exciting conversation! I’m so enjoying this dialogue because it’s been such a great opportunity to learn more about this water system. Thank you.
So, in response to your inquiries….
Etta Projects’ experience with the system:
As you may have guessed this is a new technology used by Etta Projects. Etta Projects is currently implementing the same technology in a different village, Montegrande, but due to the heavy rains we faced this year we have had to postpone the implementation of the water system on a number of occasions. It’s scheduled to go in next week! Etta Projects has had the opportunity for our in-country staff to travel to Cochabamba on a number of occasions to receive training directly from Plastiforte and to meet with other nonprofits that are using this same system, including the reputable Water For People. Joe Sesil, a water engineer and member of PWX who commented above (thanks, Joe, for your expertise :-)), also met with Plastiforte and gave the system his stamp of approval. Because we learned from experts in the field such as Joe and we saw firsthand successful cases of other nonprofits using this water system with great success and community satisfaction, we opted to move forward with this technology. Again it seems like a cost effective alternative to the elevated water tank that works well in villages similar to Nueva America, and it protects the quality of the water before distribution.
In response to your inquiries....
Electricity:
As Joe mentioned, Nueva America has a reliable source of electricity with few power outages. Many villages in the surrounding area have water systems that run on electrical pumps, and we have not observed any major issues or prolonged periods of water shortages.
The life of the water pump has a life span of 7 to 10 years (I believe I was being conservative by giving 5 years). Unfortunately even though the area has high electricity coverage, the life span of the pump could be impacted by the high and low voltage in the communities. We have not seen this occur in any village where we implemented water systems, but recognize this as a potential risk. During our training program we make water committees aware of this risk. Local municipalities should help villages replace pumps in these cases if the village solicits their support. The cost can fluctuate for a pump repair, but even in the more serious cases, to change a pump would cost between $1000 to $2000.
The cost of electricity in the rural areas to run the pump is low. It is likely that communities of up to about 50 families, spend a maximum of 200 Bs/month. (less than 30$ us/month).
Ongoing Support:
The project includes intensive training of a 6-member water committee that will manage the water system. The members will participate in workshops related to Committee Organizational Structure; Roles & Responsibilities; Financial Management; Mobilizing the Village; Water Quality; Hygiene; and Technical Operation and Management of the Water System. The training sessions will spread over 9 months and will include a 5-day intensive training course in Cochabamba by Plastiforte. After completion of the project cycle, Etta Projects will make bimonthly visits to Nueva America to monitor the administration and sustainability of the water system. We will also participate in some of the regular monthly community meetings, where the water committee’s monthly report will be incorporated into the regular agenda (the committee will report to the community the financials and other relevant matters). Etta Projects is also coordinating and partnering with the local municipality who is also responsible for continued monitoring the water system.
Water System:
The pipe is 1000 meters long and has a diameter of 3 inches. The data that Plastiforte gave regarding the pump turning on once per week is just one case example we were given. I apologize if I was not clear in my explanation. I will try to clarify…
The tower works with the pumps to maintain a stable water system pressure. The system pressure is controlled by a pressure switch set for minimum and maximum pressures – giving us a cut-in and a cut-out pressure for the pumps. As water is drawn down, the system pressure starts to drop. When it reaches the minimum system pressure, the pump cuts back in and runs until the system pressure reaches the normal maximum pressure.
The system is precharged with air to a pressure that is close to the minimum system pressure (the cut-in pressure). As the system fills, water is pumped into the bladder, compressing the air cushion in the tank. This causes an increase in system pressure. The pumps continue to run until the system pressure reaches the maximum setting (the cut-out pressure for the pump). As water is drawn from the system, the pressure will begin to decrease. When the system pressure reaches the minimum setting, the pumps will turn back on and restart the cycle. Maintaining a stable air pressure ensures that the system will run at peak efficiency, preventing the pumps from short-cycling.
According to Plastiforte, this system has the capacity to serve up to 100 homes. We are serving 40 families. The classic tower can control pressure control with a range of adjustment from 1.0 to 4.6 bars. At peak hours of water consumption, the pump may function two possibly three times a day. There may also be days that is should not have to turn on. Included in this project is the installation of domestic water meters, therefore families will be more compelled to conserve water and not leave faucets running.
The pressure switch is the main component that will need to be replaced. The cost is $30-$50. Most electrical technicians can do this work, and it does not have to be done by Plastiforte. All other tower parts are covered by the guarantee from Plastiforte for up to 20 years.
According to Engineer John Rodriguez from Water For People the “tower requires virtually no maintenance and system operates without major problems.” Water For People is currently installing 3 more towers in the peri urban of Cochabamba. John states, “If you ask me, in general, I think that that this technology works very well, in normal conditions of water quality and with a good network of energy. It can easily last 7-10 years without problems.” John says that WFP implemented these systems, they have measured both the sustainability of the water system and community satisfaction. He says this system offers both.
In response to your questions regarding the well: The depth of the well is 122 meters (w/ 4” diameter). The water table is high in this area; the static water level being 13 meters. According to statistics provided by the Prefecture the well has the capability to pump 7920 liters per hour.
Again, I appreciate all your comments. I realize that I don’t have all the specifics, but I am heading to Bolivia on August 8, hopefully in time to participate in the inauguration of a water system using this same technology in the village Montegrande. I look forward to speaking directing with the representatives at Plastiforte and getting more detailed information. In the meantime, I hope this clarified some of your questions and concerns. To be honest, many of your comments caused me to stop and reflect about the quality and sustainability of this technology. The bottom line is that Etta Projects wants to do both what is in our capacity and what’s best for this village. Etta Projects is committed to providing a sustainable water system to the village Nueva America, we are not committed to a specific technology…; however, based on information and observation of this water system, characteristics of the community and by positive reviews of it by water experts, we trust this system to be a viable option.
Thanks again and I look forward to ongoing discussions!
Katie