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Novel Tech
Our team has designed a novel liquid chlorine doser (the Venturi) that employs properties of fluid dynamics to automatically add liquid chlorine at the point of water collection (e.g. taps), without moving parts or electricity. The Venturi’s ability to precisely dose at tap outflows across varying flow rates enables consistent dosing under the taste detection limit of most users, increasing user acceptability. The use of dilute bleach as the chlorine source enables a large potential target market because dilute bleach is widely available in low-income settings.

The venturi doser was originally designed by Stanford engineers to fit onto shared handpumps, commonly found in low income urban settings.  ​The most recent version of the device was co-designed by MSR Global Health and Stanford University to fit onto shared taps at Kenyan kiosks. The Venturi uses commercially available Waterguard as its liquid chlorine source; bottles can be poured directly into the device when refills are needed. Recently we completed a field test of the chlorinator at kiosks in Kisumu, Kenya in collaboration with SWAP, PATH, and MSR Global Health. 

Our model implementation in Bangladesh 

In Dhaka, our POC disinfection model relies on monthly payments from landlords, who typically own shared water points in Dhaka. Interacting with landlords (as opposed to individual households) reduces the transaction costs of operating the chlorine dosers and also allows for regular payments to be timed with monthly rent collection. This model is accomplished by having landlords lease the device, which allows for the device to be removed and installed at another location once service payments cease. The capital cost of the technology, labor for installation and all operational costs for the safe water device is amortized over the recurring user fees gained from small increases in monthly rent. We have marketed and sold the device to almost 100 landlords in Dhaka thus far.
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Our model implementation in Kenya

In Kenya, we conducted a competitive market analysis and developed a business plan for POC in collaboration with PATH and SWAP. We recently completed a business pilot in which we sold lease and lease-to-own sales packages to kiosk owners. Kiosks paid >$250 USD over 6 months to own the devices and they have selling chlorinated water now for two years. 
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Our models at work

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  • Home
  • About
    • Our Team
  • Technology
  • Partners
  • Contact & Press