ZA FERTILIZER ENVIRONMENTAL IMPACT BASED ON LIFE CYCLE ASSESSMENT ON ITS PRODUCTIONTerannisa N. Balqis, Aditya P. Iswara and Rachmat Boedisantoso
ZA fertilizer is ammonium sulfate fertilizer commonly used in Indonesia to increase nitrogen and sulfur content in the soil. ZA fertilizer production consists of six stages; carbonation unit, reaction unit, filtration unit, neutralization unit, evaporation and crystallization unit, and drying and cooling unit which produce air emission, specifically carbon emission. This study was conducted to identify the environmental impact of ZA fertilizer using the Life Cycle Assessment (LCA) method based on data on raw materials, chemicals and fuels used, products and emissions resulting from its production process. Life cycle impact assessment was analyzed using midpoint approach with TRACI 2.1 method in Sima Pro 9.0. The result shows that acidification is the largest impact generated with 2.42 x 10w kg SO2 eq, in the Neutralization unit. The acidification in this unit is caused by addition of sulfuric acid to neutralize the liquor and electricity usage which resulting ammonia and carbon dioxide emissions.