Development of a multi-nutrient fertilizer from liquid waste of solar salt manufacturing process

Abstract

Magnesium plays a key role in the growth of a plant by acting as the central atom of the chlorophyll molecule. This study is carried out to develop a low-cost multi-nutrient fertilizer by utilizing the bittern solution. This fertilizer is capable of fulfilling the Magnesium, Potassium and Calcium requirement of a plant effectively. A dilution series of bittern was prepared, and a series of tests was carried out to demonstrate the importance of multi-nutrient fertilizer to the growth of a plant. This fertilizer contains 1.27%, 0.31% and 0.01% of highly water soluble Magnesium, Potassium and Calcium respectively to cater the short term requirement of a plant. Developing an indigenous source of supply for fertilizer is important both for the agricultural and strategic reasons. The major drawback of conventional salt production has been overcome by using bittern to produce a multi-nutrient source for plants. It could also mitigate negative environmental impacts by successfully controlling pollutant discharge. Therefore, this novel process can be considered as a comprehensive solution towards sustainable development.