Water consumption optimization and wastewater minimization in Petro Jordan Abadi plant's phosphoric acid production (HDH Nissan-C process)

This research introduces a water optimization strategy at PT Petro Jordan Abadi's phosphoric acid facility, utilizing the hemihydrate-dihydrate (HDH) Nissan-C process. A thorough water balance modeling and analysis was performed to assess reuse potential within the plant's operations. Following this research, a circular water reuse network was devised and executed, utilizing the cooling tower blowdown water from the sulfuric acid (SA) plant as make-up for the phosphoric acid (PA) process. This internal recycling technique efficiently converts a waste stream into a resource, consistent with the tenets of industrial symbiosis and the circular economy. The execution of the revamped water system has produced substantial performance enhancements. Freshwater use decreased by nearly 17%, from around 5.3 to 4.4 m3 for every metric ton of P2O5 produced. This equates to around 630 m3 of water conserved daily, directly compensating for an equivalent volume of freshwater that would otherwise be extracted from external sources.