Keep­ing har­bours clean

Element - - Clean Technology -

GHD Lim­ited and Auck­land Trans­port are the win­ners of the 2012 En­gi­neer­ing Ex­cel­lence Award for Ex­cel­lence in En­vi­ron­men­tal Prac­tice for their Tetra Trap de­sign, which pre­vents the flow of road pol­lu­tants to Auck­land’s wa­ter­ways and har­bour via the stormwa­ter sys­tem. The Te­tra­trap is a kind of screen which im­proves the cap­ture of lit­ter and con­tam­i­nants. It can be retro­fit­ted to catch­pits and re­duces the dis­charge of pol­lu­tants, sed­i­ments and heavy met­als into the en­vi­ron­ment. With no mov­ing parts, the fil­ter screens are easy to main­tain, re­quire no spe­cial clean­ing regime, can be man­u­fac­tured lo­cally, and are fully recyclable. The project raises aware­ness for cities else­where on the ben­e­fits of a sim­ple but ef­fec­tive so­lu­tion to re­duce the ex­tent of stormwa­ter con­tam­i­nants and gross pol­lu­tants from en­ter­ing re­ceiv­ing en­vi­ron­ments. There is al­ready in­ter­na­tional in­ter­est with the pos­si­bil­ity of the traps be­ing used soon in Aus­tralia.

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