One of the objectives of this work was to esimate and compare the impact of bio-based fertilizer produced out of WW treatment with the petro-chemical based fertilizers. In India, three fertilizers were commonly used namely, urea, diammonium phosphate (DAP), mono ammonium phosphate (MAP) . The GWP of a fertilizer varies based on a factors such as production process and raw material usage. The GWP of conventional fertilisers varied between 6760 and 8980 g CO2 Eq./kg of fertilizer .