Fly Ash is the residual output from the boiler furnace after bagasse has completely burnt out.
This bagasse ash is generally spread over farms and dump in ash pond which causes environmental problems also research states that Workplace exposure to dusts from the processing of bagasse can cause the chronic lung condition pulmonary fibrosis, more specifically referred to as bagassosis. So there is great need for its reuse, also it is found that bagasse ash is high in silica so it can be used as substitute to construction material.
This fly ash is also used as a substitute for firewood. It is rich in potassium and is also used by local farmers for cultivation.