DOST is a device for disturbance of stagnant water.

 
 

Stagnant water can become a breeding ground for mosquitoes and anaerobic bacteria which leads to diseases such as
malaria, dengue fever, legionella and many more.

DOST, as a temporary solution for water hygiene, aims to reduce these risks by causing surface agitation, in turn leading to less bacteria and mosquitoes in the water.

DOST works by harnessing energy from the sun to rotate a motor with a cam attached to it. On the cam rests a rod which moves up and down because of the rotation of the cam. This causes the weight at the end of some fishing wire attached to the rod to bob in and out of the water, causing a splash and ripple effect.

The set up involves securing the device into the ground, placing a small pebble into the holder to create a weight, tying the holder onto the fishing wire, adjusting the length of the rod with the screw mechanism to tighten it in place, and finally adjust the length of the string.