You are using an outdated browser For a better experience using this site, please upgrade to a modern web browser. Subscribe Get Daily Email Subscribe --> Contact Us Sign in Home News & Features Compliance Costs Bunker Prices Bunker Intelligence Asia/Pacific News Latest Features World Americas EMEA Asia/Pacific Home News & Features Asia / Pacific KR to Coordinate IMO Work on Ammonia Effluent and NOx Rules KR to Coordinate IMO Work on Ammonia Effluent and NOx Rules by Ship & Bunker News Team Tuesday May 12, 2026 Tweet Follow @shipandbunker The 13th session of the IMO PPR earlier this year. Image Credit: KR South Korea ’s Korean Register (KR) said it is coordinating two IMO expert groups covering ammonia effluent management and procedures linked to failures of NOx reduction systems. As interest in ammonia-fuelled ships grows, concerns remain over the handling of toxic ammonia effluent and the lack of global rules governing its management, KR said in an email statement on Tuesday . Ammonia effluent refers to wastewater containing small amounts of ammonia formed when unburned ammonia mixes with water during bunkering, engine operation or exhaust cleaning. Ship & Bunker reported in February that the IMO’s Pollution Prevention and Response sub-committee (PPR 13) had discussed the development of guidelines for managing ammonia effluent from ships. KR said it formed a joint working group in 2025 with South Korea’s Ministry of Oceans and Fisheries, the Korea Testing & Research Institute and major shipbuilders including Samsung Heavy Industries and Hanwha Ocean to help develop technical and regulatory frameworks. Following discussions at the IMO’s PPR 13 meeting earlier this year, the organisation agreed to move forward with formal consideration of ammonia effluent management ahead of schedule. KR Senior Surveyor Kim Joonghu n will coordinate the ammonia effluent expert group, which held its first meeting on May 7 with about 100 participants from governmen