Teens in­vent so­lar-power wa­ter pu­ri­fier

The Jewish Chronicle - - World News - BY NATHAN JEFFAY

CLEAN DRINK­ING wa­ter could soon be far more ac­ces­si­ble in the de­vel­op­ing world, thanks to two in­no­va­tive high-school pupils from Ne­tanya.

Maya Braun and Avishai Ketko, study part­ners at the city’s Moshe Sharett School, have in­vented a so­lar-pow­ered, por­ta­ble wa­ter pu­ri­fier. The 17-yearolds’ in­ven­tion will com­pete for the pres­ti­gious Stockholm Wa­ter Prize later this month.

Cur­rently, one of the most pop­u­lar DIY wa­ter pu­rifi­ca­tion tech­niques is SODIS, which, ac­cord­ing to the World Health Or­gan­i­sa­tion, takes longer to work than many peo­ple in the heat can bear to wait — at least five hours.

Maya and Avishai’s de­vice pu­ri­fies wa­ter in­stantly by re­flect­ing ul­tra­vi­o­let rays with a con­fig­u­ra­tion of mir­rors. The highly con­cen­trated rays pu­rify the drops in­stantly and can pro­duce 1.2 litres of clean wa­ter an hour.

The pu­ri­fier was in­vented as course­work for their science bagrut – equiv­a­lent of A-Level – which they com­plete next year.

Asked if she would like to es­tab­lish a start-up to man­u­fac­ture their pu­ri­fier, Maya said: “Yes, but we’re still 12th graders, so we’ll see.”

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