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Pakistan-US Science and Technology Cooperation Program
Phase 7 (2017 Deadline)

Design and testing of water ATMs - water dispensing and quality measurement units
US Partner: Mustafa Naseem, University of Colorado
Pakistan Partner: Tauseef Tauqeer, Information Technology University
 
Project summary
This project will design and test a water dispensing unit that also measures water quality to provide community access to safe drinking water in Pakistan and explore commercialization options. The dispensing units will be piloted at water filtration plants across the Punjab province.

Progress Reports

2018: Pakistan is an extremely water starved country, with water levels falling below 1000 cubic meters per capita in the recent past. Access to clean drinking water is an even greater challenge, with 16 million people in Pakistan having no choice but to drink dirty water, resulting in 41,000 children dying of diarrhea per year due to poor water and sanitation facilities. The Government of Punjab (GoP) has decided to construct Water Filtration Plants – community clean water collection points, where community members can collect clean drinking water from the node in jerry cans at no monetary cost. Research has shown that due to filtration mechanisms not being properly maintained, water quality at water filtration plants is also below appropriate levels – one study found that 27 out of 33 Water Filtration Plants in Islamabad were providing unsafe drinking water to their customers.

This project aims to create a Water ATM – an electronic device with a water dispensing unit and a water quality measurement unit. The water dispensing unit will allow consumers to collect water from water filtration plants by using an electronic (RFID) card. The water dispensing unit has four parts (a) an RFID card reader that authenticates the user (b) a solenoid valve that opens and closes the flow of water (c) a flow meter that measures the amount of water dispensed (d) a microprocessor (computer) that saves these data and communicates it to a web based dashboard. The water quality measurement unit tests different water quality parameters such as pH, turbidity and residual chlorine by using electronic probes. This data is collected without any human involvement and is uploaded to a web-based dashboard that the water utility can use to ensure that the water being dispensed is safe to drink.

So far, the water dispensing unit has been designed and fabricated. It has been deployed on a water filtration plant and the data collected at the unit can be successfully uploaded to a web-based dashboard. On the water quality measurement side, certain water quality parameters such as the pH, conductivity and oxidation reduction potential (ORP) can be measured without human intervention. Turbidity can be measured, but the water sample needs to be collected by a human and placed in a vial. We are working to automate this. The water dispensing unit and the water quality measurement unit have been integrated, such that they can both now write to the same microprocessor (computer) installed locally on the water ATM. This microprocessor communicates with the web-based dashboard using cellular data.



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