Due to developed urbanisation the Kaikondrahalli lake in Bengaluru faces a constant battle to survive in a clean state. Carrying the burden of maintaining this lake is the Bruhat Bengaluru Mahanagara Palike (BBMP), the city’s municipal authority, and the Mahadevpura Parisara Samrakshane Mattu Abhivrudhi Samiti (MAPSAS), a citizens group that works to revive lakes.

A system developed in Japan that uses beneficial microorganisms to break down toxins and food waste present in lake water. Kiran Kulkarni is assisting MAPSAS in creating the recipe.

This ball is made mixing bokashi powder (husk and sawdust) with red soil, cow dung, sludge from the bottom of the lake and EM solution, which among other things contains molasses (jaggery). According to MAPSAS, jaggery acts as food for the microorganisms (that eat up the sludge) to grow. Mixture is formed into large balls and left to ferment for a week until a fuzzy white fungus coating appears. The appearance of this coating means that the Bokashi Balls have been activated for water purification.

The balls are then dropped into the lake, where the microorganisms will eat all the sludge present in the lake, keeping it clean. This is really a healthy way to keep the lakes clean and green.