German ferry operator TT-Line has announced that its ro-ro passenger vessels, Nils Holgersson and Peter Pan, effectively utilized bio-LNG in 2025, achieving notable emissions reductions. Commissioned in 2022 and 2023, these 230-meter vessels are powered by dual-engine systems and operate in the Baltic Sea, connecting Germany, Sweden, Poland, and Lithuania.
TT-Line collaborated with Everllence to conduct continuous emission measurements on the Nils Holgersson for nearly a year, optimizing operations. Findings indicated no significant aging effects on the engines related to methane emissions, consistent emission values between tests and onboard measurements, and no adverse impacts on engine parameters during bio-LNG operations.
Andreas Schaerli, COO of TT-Line, emphasized that using climate-neutral bio-LNG, derived from waste materials, significantly contributes to climate protection in the Baltic Sea. Customers can offset their journey’s emissions by choosing bio-LNG during booking, aligning with TT-Line’s commitment to innovative, sustainable solutions in ferry transport.
Bio-LNG is sourced from agricultural waste in northern Europe, where biogas is processed and transported to TT-Line vessels. Replacing one tonne of fossil LNG with bio-LNG results in a 100% reduction in CO2 emissions, underscoring the environmental benefits of this fuel alternative.
Share it now


















